/* roulang page: index */
:root {
  --primary: #2F7BE0;
  --primary-hover: #2567c5;
  --primary-light: #EAF2FD;
  --accent: #0FA3A3;
  --accent-light: #E6F7F7;
  --gold: #E8A23E;
  --gold-light: #FBF1E0;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #1E293B;
  --text-2: #64748B;
  --text-3: #94A3B8;
  --border: #DCE7F1;
  --shadow-1: 0 1px 2px rgba(15, 45, 85, 0.04), 0 8px 20px rgba(15, 45, 85, 0.06);
  --shadow-2: 0 2px 4px rgba(15, 45, 85, 0.05), 0 12px 28px rgba(15, 45, 85, 0.10);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-btn: 8px;
  --container: 1200px;
  --section-space: 88px;
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; transition: color .2s ease, box-shadow .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.section { padding: var(--section-space) 0; }
.section-head { max-width: 780px; margin: 0 auto 52px; text-align: center; }
.section-head .eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; font-weight: 600; color: var(--primary);
  background: var(--primary-light); padding: 6px 14px; border-radius: 30px;
  margin-bottom: 16px; letter-spacing: .2px;
}
.section-head h2 { font-size: 30px; line-height: 1.35; font-weight: 700; letter-spacing: .5px; }
.section-head p { margin-top: 12px; color: var(--text-2); font-size: 16px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: var(--radius-btn); font-size: 15px; font-weight: 600;
  line-height: 1; padding: 13px 22px; transition: all .2s ease; white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex: 0 0 auto; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 16px rgba(47, 123, 224, 0.24); }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(47, 123, 224, 0.30); }
.btn-primary:active { transform: translateY(0); filter: brightness(.96); }
.btn-ghost { background: #fff; color: var(--primary); border: 1px solid var(--border); box-shadow: 0 2px 6px rgba(15, 45, 85, 0.04); }
.btn-ghost:hover { border-color: var(--primary); background: var(--primary-light); transform: translateY(-1px); }
.btn-ghost:active { transform: translateY(0); filter: brightness(.98); }
.btn-small { padding: 9px 16px; font-size: 14px; }
.btn-large { padding: 15px 28px; font-size: 16px; }

/* badge */
.badge {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--primary);
  background: var(--primary-light); padding: 2px 10px; border-radius: 30px; line-height: 1.6;
}
.badge-green { color: #0B7C7C; background: var(--accent-light); }
.badge-gold { color: #A76A0C; background: var(--gold-light); }

/* header ================================================= */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 1px 0 var(--border), 0 8px 24px rgba(15, 45, 85, 0.04);
}
.site-header .brand-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 13px 0; transition: padding .25s ease;
}
.site-header .brand {
  display: inline-flex; align-items: center; gap: 10px;
}
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px; flex: 0 0 auto;
  background: var(--primary); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; box-shadow: 0 6px 14px rgba(47, 123, 224, 0.26);
}
.brand-name { font-size: 21px; font-weight: 700; letter-spacing: .5px; }
.brand-name b { font-weight: 700; }
.brand-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  width: 38px; height: 38px; border-radius: var(--radius-sm); display: inline-flex;
  align-items: center; justify-content: center; color: var(--text);
  border: 1px solid transparent; transition: all .2s ease;
}
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover { background: var(--primary-light); color: var(--primary); border-color: #C8DFF7; }
.icon-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

.channel-row {
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 48px; transition: min-height .25s ease;
}
.nav-list { display: flex; align-items: center; gap: 2px; overflow-x: auto; scrollbar-width: none; -ms-overflow-style: none; }
.nav-list::-webkit-scrollbar { display: none; }
.nav-list li a {
  display: inline-flex; align-items: center; padding: 8px 14px; font-size: 15px;
  font-weight: 500; color: var(--text-2); border-radius: 6px; position: relative;
  white-space: nowrap;
}
.nav-list li a:hover { color: var(--primary); background: var(--primary-light); }
.nav-list li a.active { color: var(--primary); font-weight: 600; }
.nav-list li a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 0;
  height: 2px; border-radius: 2px; background: var(--primary);
}
.trend-tags { display: flex; align-items: center; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.trend-tags::-webkit-scrollbar { display: none; }
.trend-title { font-size: 12px; color: var(--text-3); white-space: nowrap; display: inline-flex; align-items: center; gap: 4px; }
.trend-title svg { width: 13px; height: 13px; }
.trend-tag {
  font-size: 12px; padding: 3px 10px; border-radius: 30px; background: #F0F4F9;
  color: var(--text-2); border: 1px solid var(--border); white-space: nowrap;
  transition: all .2s;
}
.trend-tag:hover { color: var(--primary); background: var(--primary-light); border-color: #BDD8F5; }

.site-header.is-shrink .brand-row { padding: 8px 0; }
.site-header.is-shrink .channel-row { min-height: 44px; }
.site-header.is-shrink .brand-mark { width: 30px; height: 30px; font-size: 17px; border-radius: 8px; }
.site-header.is-shrink .brand-name { font-size: 18px; }

/* search overlay */
.search-panel {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(255,255,255,.98);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-2);
  transform: translateY(-100%); transition: transform .3s ease;
}
.search-panel.open { transform: translateY(0); }
.search-inner { max-width: var(--container); margin: 0 auto; padding: 22px 24px; display: flex; gap: 12px; }
.search-inner input {
  flex: 1; height: 48px; border: 1px solid var(--border); border-radius: var(--radius-btn);
  padding: 0 16px; font-size: 15px; color: var(--text); outline: none; background: #FAFCFF;
}
.search-inner input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,123,224,.15); }
.search-close { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: var(--radius-btn); border: 1px solid var(--border); background: #fff; color: var(--text); }
.search-close:hover { background: var(--primary-light); border-color: var(--primary); color: var(--primary); }
.search-close svg { width: 20px; height: 20px; }

/* hero ================================================= */
.hero {
  position: relative; background: linear-gradient(150deg, #ffffff 0%, #F4F9FF 58%, #E7F1FC 100%);
  overflow: hidden; padding: 64px 0 80px;
}
.hero-decor { position: absolute; inset: 0; pointer-events: none; opacity: .25; background-image: url("/assets/images/backpic/back-1.png"); background-size: cover; background-position: center; }
.hero-decor-mask { position: absolute; inset: 0; background: linear-gradient(90deg, #fff 0%, rgba(255,255,255,.72) 60%, rgba(255,255,255,.10) 100%); pointer-events: none; }
.hero-grid {
  position: relative; display: grid; grid-template-columns: 44% 56%;
  align-items: center; gap: 48px;
}
.hero-copy { padding-right: 8px; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600;
  color: var(--primary); background: #fff; border: 1px solid #CFE3F9;
  border-radius: 30px; padding: 6px 14px; margin-bottom: 20px; box-shadow: 0 2px 6px rgba(47,123,224,.08);
}
.hero-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.hero h1 { font-size: 38px; line-height: 1.35; font-weight: 700; letter-spacing: .5px; }
.hero h1 .highlight {
  color: var(--primary); position: relative; background: linear-gradient(transparent 70%, #D8E9FC 0);
}
.hero-sub { margin-top: 18px; font-size: 16px; line-height: 1.85; color: var(--text-2); max-width: 520px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 14px 22px; margin-top: 22px;
}
.hero-trust li { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-2); }
.hero-trust li svg { width: 16px; height: 16px; color: var(--accent); }
.hero-visual { position: relative; }
.device-frame {
  background: #fff; border-radius: var(--radius-lg); padding: 14px 14px 18px;
  box-shadow: 0 24px 70px rgba(21, 72, 122, 0.14), 0 2px 8px rgba(15, 45, 85, .08);
  border: 1px solid #E6EDF5; transform: rotate(0.8deg);
}
.device-bar {
  display: flex; align-items: center; gap: 8px; padding: 4px 6px 12px;
}
.device-bar i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.device-bar i:nth-child(1){ background:#FF6B5E; }
.device-bar i:nth-child(2){ background:#F7B849; }
.device-bar i:nth-child(3){ background:#3CCF6D; }
.device-bar .url-box {
  flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 6px;
  height: 28px; font-size: 12px; color: var(--text-2); display: flex; align-items: center;
  padding: 0 12px; gap: 6px; overflow: hidden; white-space: nowrap;
}
.device-bar .url-box svg { width: 12px; height: 12px; }
.device-screen { border-radius: 10px; overflow: hidden; border: 1px solid #EDF2F8; background: var(--bg); }
.device-screen img { width: 100%; height: 330px; object-fit: cover; }
.hero-float-card {
  position: absolute; right: -18px; bottom: 44px; background: #fff; border-radius: 12px;
  box-shadow: var(--shadow-2); border: 1px solid var(--border); padding: 12px 16px;
  display: flex; align-items: center; gap: 10px; font-size: 13px;
}
.hero-float-card .fc-icon {
  width: 34px; height: 34px; border-radius: 9px; background: var(--accent-light);
  color: var(--accent); display: flex; align-items: center; justify-content: center;
}
.hero-float-card svg { width: 17px; height: 17px; }
.hero-float-card b { display: block; font-size: 14px; line-height: 1.3; }
.hero-float-card span { color: var(--text-3); font-size: 12px; }

/* feature proof ========================================== */
.feature-grid { display: grid; grid-template-columns: 42% 58%; gap: 24px; align-items: stretch; }
.stat-panel {
  background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-1);
  padding: 30px; display: flex; flex-direction: column; justify-content: space-between;
  border-top: 3px solid var(--primary); overflow: hidden; position: relative;
}
.stat-panel .stat-cover {
  position: absolute; inset: 0; opacity: .18; background-image: url("/assets/images/backpic/back-2.png");
  background-size: cover; background-position: center; pointer-events: none; mask-image: linear-gradient(120deg, transparent 20%, #000 90%);
}
.stat-head { display: flex; align-items: center; gap: 10px; position: relative; }
.stat-head .ico { width: 40px; height: 40px; background: var(--primary-light); color: var(--primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; }
.stat-head .ico svg { width: 20px; height: 20px; }
.stat-head h3 { font-size: 18px; font-weight: 700; }
.stat-body { position: relative; display: flex; gap: 22px; flex-wrap: wrap; margin-top: 24px; }
.stat-item { flex: 1 1 120px; }
.stat-item .num { font-size: 32px; font-weight: 700; color: var(--primary); line-height: 1.2; letter-spacing: -.5px; display: flex; align-items: baseline; gap: 4px; }
.stat-item .num small { font-size: 13px; font-weight: 500; color: var(--text-2); }
.stat-item p { font-size: 13px; color: var(--text-2); margin-top: 2px; }
.stat-updated { position: relative; margin-top: 16px; font-size: 12px; color: var(--text-3); display: flex; align-items: center; gap: 6px; }
.stat-updated svg { width: 13px; height: 13px; color: var(--accent); }

.right-features { display: flex; flex-direction: column; gap: 20px; }
.feature-card {
  background: #fff; border-radius: var(--radius-md); padding: 26px 28px;
  box-shadow: var(--shadow-1); display: grid; grid-template-columns: 48px 1fr; gap: 16px;
  align-items: flex-start; transition: transform .2s ease, box-shadow .2s ease;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.fc-ico { width: 48px; height: 48px; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; }
.fc-ico svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: 17px; font-weight: 700; }
.feature-card p { margin-top: 4px; font-size: 14px; color: var(--text-2); line-height: 1.8; }
.feature-card .feature-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }

/* carousel =============================================== */
.carousel-section { background: #fff; }
.carousel-wrap { position: relative; max-width: 940px; margin: 0 auto; }
.carousel-viewport { overflow: hidden; border-radius: var(--radius-lg); }
.carousel-track { display: flex; transition: transform .5s cubic-bezier(.25,.8,.25,1); }
.carousel-slide { flex: 0 0 100%; padding: 4px 10px; }
.carousel-slide .slide-frame {
  border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden;
  background: #fff; box-shadow: var(--shadow-1);
}
.slide-img { position: relative; aspect-ratio: 16/9; background: var(--bg); }
.slide-img img { width: 100%; height: 100%; object-fit: cover; }
.slide-caption { padding: 16px 20px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.slide-caption b { font-size: 16px; }
.slide-caption span { color: var(--text-2); font-size: 13px; }
.carousel-controls { display: flex; justify-content: center; align-items: center; gap: 20px; margin-top: 24px; }
.carousel-btn {
  width: 42px; height: 42px; border-radius: 50%; background: #fff; color: var(--text-2);
  border: 1px solid var(--border); display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 8px rgba(15,45,85,.06); transition: all .2s;
}
.carousel-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.carousel-btn svg { width: 19px; height: 19px; }
.carousel-dots { display: flex; gap: 8px; }
.carousel-dots button { width: 8px; height: 8px; border-radius: 8px; background: #C6D7E8; transition: all .25s; }
.carousel-dots button.active { width: 22px; background: var(--primary); }
.carousel-dots button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* system requirement ===================================== */
.sys-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.sys-card { background: #fff; box-shadow: var(--shadow-1); border-radius: var(--radius-lg); padding: 28px 30px; }
.sys-card .sys-head { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.sys-card .sys-ico { width: 44px; height: 44px; border-radius: 11px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; }
.sys-card .sys-ico svg { width: 21px; height: 21px; }
.sys-card h3 { font-size: 18px; }
.sys-card .sys-head p { font-size: 12px; color: var(--text-3); }
.sys-list { display: flex; flex-direction: column; }
.sys-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; padding: 12px 0; border-bottom: 1px dashed var(--border); }
.sys-row:last-child { border-bottom: none; padding-bottom: 0; }
.sys-row dt { font-size: 14px; color: var(--text-2); flex: 0 0 110px; }
.sys-row dd { font-size: 14px; font-weight: 500; text-align: right; color: var(--text); }

/* user reviews =========================================== */
.review-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.review-card { background: #fff; box-shadow: var(--shadow-1); border-radius: var(--radius-md); padding: 26px 26px 20px; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; }
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-2); }
.review-card.mid { background: var(--primary); color: #fff; }
.review-card.mid .review-user p { color: #D7E9FC; }
.review-card.mid .meta-date { color: #C3DCF7; }
.stars { display: flex; gap: 3px; margin-bottom: 14px; }
.stars svg { width: 15px; height: 15px; color: var(--gold); }
.review-text { font-size: 14px; line-height: 1.85; color: var(--text); flex: 1; }
.review-card.mid .review-text { color: #F3F8FE; }
.review-user { display: flex; align-items: center; gap: 10px; margin-top: 18px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px; }
.review-card.mid .avatar { background: rgba(255,255,255,.22); color: #fff; }
.review-user b { font-size: 14px; display: block; line-height: 1.3; }
.review-user p { font-size: 12px; color: var(--text-3); }

/* download section ======================================= */
.download-section { background: linear-gradient(180deg, #F5F8FC 0%, #EAF3FC 100%); }
.dl-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px; }
.dl-card { background: #fff; border-radius: var(--radius-md); padding: 22px 16px; box-shadow: var(--shadow-1); text-align: center; border: 1px solid transparent; transition: all .2s ease; position: relative; }
.dl-card:hover { box-shadow: var(--shadow-2); border-color: #C9DFF7; transform: translateY(-3px); }
.dl-card .platform-icon { width: 50px; height: 50px; border-radius: 14px; margin: 0 auto 10px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; }
.dl-card .platform-icon svg { width: 24px; height: 24px; }
.dl-card h3 { font-size: 17px; }
.dl-card p { font-size: 12px; color: var(--text-3); margin-top: 2px; }
.dl-card .btn { width: 100%; margin-top: 14px; }
.dl-meta { margin-top: 12px; font-size: 12px; color: var(--text-2); line-height: 1.6; }
.download-sub-links { display: flex; justify-content: center; gap: 24px; margin-top: 34px; flex-wrap: wrap; }
.download-sub-links a { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; color: var(--text-2); }
.download-sub-links a:hover { color: var(--primary); }
.download-sub-links a svg { width: 16px; height: 16px; }

/* news list ============================================== */
.news-list { display: flex; flex-direction: column; gap: 16px; max-width: 960px; margin: 0 auto; }
.news-card { background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-1); transition: transform .2s ease, box-shadow .2s ease; }
.news-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); }
.news-card a { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 14px; align-items: center; }
.news-card__thumb { border-radius: 8px; overflow: hidden; aspect-ratio: 16/10; background: var(--bg); }
.news-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-card__body { padding-right: 10px; min-width: 0; }
.news-card__meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-3); }
.news-card__meta time { display: inline-flex; align-items: center; gap: 4px; }
.news-card__meta time svg { width: 13px; height: 13px; }
.news-card__title { font-size: 16px; font-weight: 600; margin-top: 6px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-card__summary {
  font-size: 13px; color: var(--text-2); margin-top: 5px; line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.news-card__more { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; color: var(--primary); margin-top: 8px; font-weight: 600; }
.news-empty {
  border: 1px dashed var(--border); background: #fff; border-radius: var(--radius-md);
  padding: 42px 20px; text-align: center; color: var(--text-2); font-size: 15px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.news-empty svg { width: 32px; height: 32px; color: var(--text-3); opacity: .8; }

/* faq ==================================================== */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item { background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-1); margin-bottom: 14px; overflow: hidden; transition: box-shadow .2s; }
.faq-item.open { box-shadow: var(--shadow-2); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px; font-size: 15px; font-weight: 600; color: var(--text); text-align: left;
  transition: color .2s;
}
.faq-question:hover { color: var(--primary); }
.faq-question svg { width: 18px; height: 18px; flex: 0 0 auto; color: var(--text-3); transition: transform .3s ease, color .2s; }
.faq-item.open .faq-question { color: var(--primary); }
.faq-item.open .faq-question svg { transform: rotate(90deg); color: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-answer-inner { padding: 0 22px 20px; font-size: 14px; line-height: 1.9; color: var(--text-2); border-top: 1px dashed var(--border); padding-top: 14px; margin: 0 22px 0 22px; padding-bottom: 20px; }
.faq-answer-inner a { color: var(--primary); text-decoration: underline; text-underline-offset: 4px; text-decoration-color: #C6DFF9; }
.faq-answer-inner a:hover { color: var(--primary-hover); }

/* final cta ============================================== */
.cta-zone { background: #fff; }
.cta-box {
  background: linear-gradient(130deg, #EAF3FD 0%, #F7FBFF 45%, #E5F2FF 100%);
  border: 1px solid #D6E6F8; border-radius: 20px; padding: 48px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap;
}
.cta-box .cta-copy h2 { font-size: 26px; font-weight: 700; line-height: 1.35; }
.cta-box .cta-copy p { margin-top: 10px; color: var(--text-2); font-size: 15px; max-width: 540px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.cta-note { margin-top: 22px; display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; font-size: 12px; color: var(--text-3); }
.cta-note span { display: inline-flex; align-items: center; gap: 5px; }
.cta-note svg { width: 14px; height: 14px; color: var(--accent); }

/* footer ================================================= */
.site-footer { background: #11202F; color: #A6B7C8; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; padding: 56px 0 40px; }
.footer-brand .brand { display: inline-flex; align-items: center; gap: 9px; font-size: 19px; color: #fff; font-weight: 700; }
.footer-brand .brand-mark { width: 32px; height: 32px; font-size: 17px; }
.footer-brand p { font-size: 13px; line-height: 1.9; margin-top: 16px; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul a { font-size: 13px; color: #A6B7C8; transition: color .2s; }
.footer-col ul a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #26384A; padding: 17px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 12px; color: #6B7E91; }
.footer-bottom a { color: #6B7E91; }
.footer-bottom a:hover { color: #BDCDDC; }

/* mobile nav */
.m-nav-btn { display: none; }
.mobile-drawer { display: none; position: fixed; top: 0; left: 0; bottom: 0; width: 300px; max-width: 88vw; z-index: 210; background: #fff; box-shadow: var(--shadow-2); transform: translateX(-105%); transition: transform .3s ease; }
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer .drawer-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 20px 14px; border-bottom: 1px solid var(--border); }
.mobile-drawer .drawer-nav { padding: 12px; }
.mobile-drawer .drawer-nav a { display: block; padding: 12px 12px; border-radius: 8px; font-size: 15px; color: var(--text); font-weight: 500; }
.mobile-drawer .drawer-nav a:hover, .mobile-drawer .drawer-nav a.active { background: var(--primary-light); color: var(--primary); }
.drawer-mask { display: none; position: fixed; inset: 0; background: rgba(17,32,47,.44); z-index: 205; }
.drawer-mask.show { display: block; }

/* back to top */
.to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 99; width: 44px; height: 44px;
  background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 22px rgba(47,123,224,.3); opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); background: var(--primary-hover); }
.to-top svg { width: 20px; height: 20px; }

/* responsive ============================================ */
@media (max-width: 1060px) {
  :root { --section-space: 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-copy { padding-right: 0; }
  .hero-visual { max-width: 720px; margin: 0 auto; }
  .hero-float-card { right: 8px; bottom: 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .dl-grid { grid-template-columns: 1fr 1fr; gap: 18px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}
@media (max-width: 820px) {
  .section-head h2 { font-size: 25px; }
  .sys-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; max-width: 540px; margin: 0 auto; }
  .cta-box { padding: 36px 24px; }
  .news-card a { grid-template-columns: 100px 1fr; gap: 14px; }
  .channel-row { align-items: stretch; flex-direction: column; gap: 4px; }
  .nav-list li a { font-size: 14px; padding: 7px 12px; }
  .nav-list li a.active::after { bottom: auto; height: auto; width: auto; }
}
@media (max-width: 640px) {
  :root { --section-space: 52px; }
  .container { padding-left: 16px; padding-right: 16px; }
  .hero { padding: 44px 0 56px; }
  .hero h1 { font-size: 27px; }
  .hero-sub { font-size: 15px; }
  .hero-actions .btn { width: 100%; }
  .hero-float-card { display: none; }
  .device-screen img { height: 300px; }
  .brand-row { padding-top: 10px; padding-bottom: 10px; }
  .brand-name { font-size: 18px; }
  .channel-row { display: none; }
  .m-nav-btn { display: inline-flex; }
  .feature-card { grid-template-columns: 40px 1fr; gap: 12px; padding: 20px 16px; }
  .fc-ico { width: 40px; height: 40px; }
  .fc-ico svg { width: 19px; height: 19px; }
  .dl-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 26px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; justify-content: center; text-align: center; }
  .news-card a { grid-template-columns: 1fr; }
  .news-card__thumb { aspect-ratio: 16/7; }
  .cta-actions { width: 100%; flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .slide-caption { flex-direction: column; align-items: flex-start; gap: 4px; }
  .sys-card { padding: 22px 18px; }
  .carousel-slide { padding: 0; }
  .to-top { right: 16px; bottom: 16px; }
}

/* roulang page: article */
:root {
  --primary: #2F7BE0;
  --primary-deep: #1f64bf;
  --primary-soft: #eaf2fc;
  --secondary: #0FA3A3;
  --gold: #f0b34b;
  --bg: #f5f8fc;
  --card: #ffffff;
  --text: #1e293b;
  --text-sub: #64748b;
  --line: #dce7f1;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15,45,85,.04), 0 8px 20px rgba(15,45,85,.05);
  --shadow-md: 0 2px 4px rgba(15,45,85,.05), 0 14px 30px rgba(15,45,85,.08);
  --header-h: 112px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-deep); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow,
.post-width {
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}
:focus-visible {
  outline: 3px solid rgba(47,123,224,.38);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255,255,255,.98);
  box-shadow: 0 1px 0 rgba(15,45,85,.05), 0 6px 18px rgba(15,45,85,.03);
}
.site-header .container { display: flex; flex-direction: column; }
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  padding: 8px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: .01em;
  font-size: 18px;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  border-radius: 10px;
  font-size: 17px;
  letter-spacing: 0;
  box-shadow: 0 6px 14px rgba(47,123,224,.24);
}
.brand-tools { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  color: #475569;
  background: #f1f5f9;
  transition: all .2s ease;
}
.icon-btn:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
.icon-btn:active { transform: scale(.96); }
.icon-btn svg { width: 19px; height: 19px; }
.m-nav-btn { display: none; }
.channel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 50px;
  border-top: 1px solid #eef3f8;
  flex-wrap: wrap;
}
.nav-list {
  display: flex;
  align-items: center;
  height: 50px;
  gap: 4px;
}
.nav-list li { height: 100%; }
.nav-list a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 100%;
  padding: 0 16px;
  color: #334155;
  font-weight: 500;
  font-size: 15px;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  opacity: 0;
  transform: scaleX(.6);
  transition: all .2s ease;
}
.nav-list a:hover,
.nav-list a.active { color: var(--primary); }
.nav-list a:hover::after,
.nav-list a.active::after {
  opacity: 1;
  transform: scaleX(1);
}
.trend-tags {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  padding: 4px 0;
}
.trend-title {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #8492a6;
  font-size: 12px;
  margin-right: 2px;
}
.trend-title svg { width: 14px; height: 14px; color: var(--secondary); }
.trend-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: #eef4fa;
  color: #62748c;
  line-height: 1.5;
  transition: all .2s ease;
}
.trend-tag:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
.breadcrumb-bar {
  border-bottom: 1px solid #e8eef5;
  background: #fff;
}
.crumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  min-height: 46px;
  gap: 6px;
  font-size: 13px;
  color: #8492a6;
}
.crumb-list a { color: var(--primary); }
.crumb-list .sep { color: #b9c6d6; }
.crumb-list .current { display: inline-block; max-width: 320px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
main { min-height: calc(100vh - 300px); }
.post-page-main { padding: 28px 0 60px; }
.post-article {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 52px 48px 48px;
  margin: 26px 0 26px;
}
.post-header { margin-bottom: 34px; }
.post-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 13px;
  color: var(--text-sub);
}
.post-kicker .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 999px;
  padding: 3px 12px;
  font-weight: 600;
  font-size: 12px;
}
.post-title {
  font-size: 33px;
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text);
  margin-bottom: 16px;
}
.post-meta-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 20px;
  color: var(--text-sub);
  font-size: 13px;
}
.post-meta-list .meta-divider { width: 1px; height: 12px; background: #dce5ee; }
.meta-mini { display: inline-flex; align-items: center; gap: 6px; color: #75849a; }
.meta-mini svg { width: 15px; height: 15px; opacity: .65; }
.post-body {
  font-size: 16px;
  line-height: 1.9;
  color: #243341;
}
.post-body::after {
  content: "";
  display: block;
  width: 100%;
  height: 1px;
  background: #e9eff6;
  margin: 44px 0 0;
}
.post-body h2,
.post-body h3,
.post-body h4 {
  margin: 1.6em 0 .7em;
  line-height: 1.45;
  color: #10233f;
  font-weight: 700;
}
.post-body h2 { font-size: 26px; padding-top: .2em; }
.post-body h3 { font-size: 20px; color: #1c3759; }
.post-body p { margin-bottom: 1.35em; }
.post-body a {
  color: var(--primary);
  text-decoration: underline;
  text-decoration-color: rgba(47,123,224,.35);
  text-underline-offset: 3px;
}
.post-body ul,
.post-body ol { margin: 0 0 1.5em 1.5em; }
.post-body ul li { list-style: disc; margin-bottom: .44em; }
.post-body ol li { list-style: decimal; margin-bottom: .44em; }
.post-body img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin: 1.7em auto;
  max-height: 640px;
  object-fit: cover;
}
.post-body blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  background: #f3f8ff;
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: #41536a;
}
.post-body blockquote p { margin-bottom: .2em; }
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 14px;
  background: #fff;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.post-body table th,
.post-body table td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
}
.post-body table th { background: #f2f7fd; color: #20344e; font-weight: 600; }
.post-body code {
  background: #eef3f9;
  color: #234;
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}
.post-body pre {
  background: #152b47;
  color: #e9f1fb;
  padding: 18px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.6em 0;
  line-height: 1.65;
}
.post-body pre code { background: transparent; color: inherit; padding: 0; }
.post-tail {
  margin-top: 20px;
}
.post-cta-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, #f6fafe, #e9f3fd);
  border: 1px solid #dfeafa;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 38px;
}
.post-cta-line p { font-size: 16px; color: #264064; font-weight: 600; line-height: 1.6; }
.post-cta-line span { display: block; font-size: 13px; color: #63738b; font-weight: 400; margin-top: 2px; }
.post-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  transition: all .2s ease;
}
.post-cta-btn:hover {
  background: var(--primary-deep);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(47,123,224,.22);
}
.empty-post {
  background: #fff;
  border: 1px dashed #d4e0ed;
  border-radius: var(--radius-lg);
  padding: 80px 24px;
  text-align: center;
  margin: 40px 0;
  box-shadow: none;
}
.empty-post .empty-title { font-size: 20px; color: #2b3a50; margin-bottom: 12px; }
.empty-post p { color: var(--text-sub); font-size: 14px; margin-bottom: 20px; }
.empty-link {
  display: inline-flex;
  align-items: center;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  padding: 9px 20px;
  font-weight: 600;
  font-size: 14px;
}
.empty-link:hover { background: var(--primary-deep); color: #fff; }
/* Extra reading */
.reading-area {
  margin: 64px 0 38px;
}
.area-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 26px;
}
.area-title h2 { font-size: 27px; color: var(--text); font-weight: 700; letter-spacing: -.01em; }
.area-title .more-link {
  font-size: 13px;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}
.area-title .more-link svg { width: 14px; height: 14px; }
.reading-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 22px;
  align-items: stretch;
}
.richtext-nav {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow .22s ease, transform .22s ease;
  display: flex;
  flex-direction: column;
}
.richtext-nav:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.richtext-media { display: block; aspect-ratio: 16 / 8.6; overflow: hidden; background: #eef3f8; }
.richtext-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.richtext-nav:hover .richtext-media img { transform: scale(1.025); }
.richtext-content { padding: 24px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.richtext-kicker {
  display: inline-block;
  width: max-content;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 3px 12px;
  margin-bottom: 12px;
}
.richtext-title { font-size: 19px; font-weight: 700; line-height: 1.5; color: var(--text); margin-bottom: 8px; }
.richtext-nav:hover .richtext-title { color: var(--primary); }
.richtext-desc { font-size: 13.5px; color: var(--text-sub); line-height: 1.75; flex: 1; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.richtext-link { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--primary); font-weight: 600; }
.richtext-link svg { width: 14px; height: 14px; }
.wide-nav-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 22px;
}
.wide-nav {
  display: flex;
  align-items: stretch;
  border-radius: var(--radius-md);
  background: #fff;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  min-height: 132px;
  transition: box-shadow .22s ease, transform .22s ease;
}
.wide-nav:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.wide-nav-thumb {
  width: 31%;
  min-width: 120px;
  overflow: hidden;
  background: #eef3f8;
}
.wide-nav-thumb img { width: 100%; height: 100%; object-fit: cover; }
.wide-nav-content { padding: 18px 20px; display: flex; flex-direction: column; justify-content: center; }
.wide-nav-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 6px;
}
.wide-nav:hover .wide-nav-title { color: var(--primary); }
.wide-nav-read { font-size: 13px; color: var(--text-sub); }
.wide-nav-read strong { font-weight: 600; color: var(--text); }
/* small common blocks */
.article-faq-box {
  background: #fff;
  border: 1px solid #e8eef5;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 30px 38px 18px;
  margin: 50px 0;
}
.article-faq-box h2 { font-size: 25px; margin-bottom: 18px; }
.faq-list details {
  border-bottom: 1px solid #e5edf6;
  border-radius: 0;
}
.faq-list summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  padding: 17px 8px;
  color: #263650;
  font-weight: 650;
  font-size: 16px;
  line-height: 1.6;
  transition: color .2s ease;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:hover { color: var(--primary); }
.faq-list summary .arrow {
  width: 20px;
  height: 20px;
  margin-top: 5px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #edf3f9;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: #647b94;
  font-weight: 400;
  transition: all .2s ease;
}
.faq-list details[open] summary { color: var(--primary); }
.faq-list details[open] .arrow {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-list details .answer {
  padding: 0 10px 22px 40px;
  color: #5d6f85;
  font-size: 14px;
  line-height: 1.95;
}
.section-light {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 28px 34px;
  margin: 30px 0;
}
.footer-pre-cta {
  background: #0f2c4b;
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  display: flex;
  align-items: center;
  gap: 22px;
  justify-content: space-between;
  flex-wrap: wrap;
  margin: 58px 0 14px;
  color: #fff;
}
.footer-pre-cta h2 { font-size: 21px; color: #fff; margin-bottom: 4px; }
.footer-pre-cta p { font-size: 14px; opacity: .78; }
.footer-pre-cta .btn-light {
  display: inline-flex;
  align-items: center;
  background: #fff;
  color: #0f2c4b;
  font-weight: 700;
  padding: 9px 22px;
  border-radius: 8px;
  font-size: 14px;
  transition: all .2s ease;
}
.footer-pre-cta .btn-light:hover { background: #dcebff; color: #0a2036; }
/* footer */
.site-footer {
  background: #fff;
  border-top: 1px solid #e5ecf4;
  margin-top: 66px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 44px;
  padding: 42px 0 28px;
}
.footer-col h4 { font-size: 15px; color: #1f3044; margin-bottom: 14px; font-weight: 700; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: #627187; font-size: 14px; }
.footer-col ul a:hover { color: var(--primary); }
.footer-brand p { color: #66768f; font-size: 13.5px; line-height: 1.85; margin-top: 14px; }
.footer-brand .brand { font-size: 18px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  border-top: 1px solid #edf2f7;
  padding: 18px 0;
  color: #94a3b8;
  font-size: 12px;
}
@media (max-width: 1024px) {
  .trend-tags { display: none; }
  .container { padding-left: 20px; padding-right: 20px; }
}
@media (max-width: 768px) {
  .brand-mini { min-height: 54px; }
  .m-nav-btn { display: inline-flex; }
  .channel-row {
    position: fixed;
    inset: auto 0 auto 0;
    top: 62px;
    display: block;
    background: #fff;
    box-shadow: 0 20px 30px rgba(15,45,85,.12);
    max-height: 0;
    overflow: hidden;
    border: 0;
    transition: max-height .25s ease;
  }
  .site-header.nav-open .channel-row { max-height: 460px; overflow-y: auto; border-bottom: 1px solid #e8eef5; }
  .nav-list { display: block; height: auto; padding: 8px 12px; }
  .nav-list li { height: auto; }
  .nav-list a { display: flex; height: 44px; padding: 0 12px; }
  .nav-list a::after { display: none; }
  .nav-list a.active { background: var(--primary-soft); border-radius: 8px; }
  .breadcrumb-bar { margin-top: 0; }
  .post-article { padding: 34px 22px 30px; border-radius: 14px; margin-top: 18px; }
  .post-width, .container-narrow { padding-left: 16px; padding-right: 16px; }
  .post-title { font-size: 27px; }
  .post-meta-list { gap: 8px 12px; }
  .post-meta-list .meta-divider { height: 10px; }
  .reading-grid { grid-template-columns: 1fr; }
  .wide-nav-row { grid-template-columns: 1fr; }
  .richtext-desc { -webkit-line-clamp: 3; }
  .article-faq-box { padding: 24px 18px 10px; }
  .footer-top { grid-template-columns: 1fr; gap: 30px; }
  .footer-pre-cta { padding: 24px 22px; }
}
@media (max-width: 480px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .post-title { font-size: 24px; line-height: 1.45; }
  .post-cta-line { padding: 18px 16px; }
  .post-cta-btn { width: 100%; }
  .richtext-content { padding: 18px 16px 20px; }
  .wide-nav { flex-direction: column; }
  .wide-nav-thumb { width: 100%; min-width: 0; max-height: 130px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* roulang page: category1 */
:root{
  --primary:#2F7BE0;
  --primary-dark:#1F63C4;
  --primary-soft:#EAF2FD;
  --teal:#0FA3A3;
  --teal-soft:#E4F7F7;
  --gold:#F0B34B;
  --gold-soft:#FFF5E0;
  --bg:#F5F8FC;
  --white:#FFFFFF;
  --text:#1E293B;
  --muted:#64748B;
  --border:#DCE7F1;
  --shadow-sm:0 1px 2px rgba(15,45,85,.04), 0 4px 12px rgba(15,45,85,.06);
  --shadow-md:0 2px 5px rgba(15,45,85,.06), 0 16px 32px rgba(15,45,85,.09);
  --radius-sm:6px;
  --radius:14px;
  --radius-lg:20px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none}
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
/* header */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(255,255,255,.98);
  border-bottom:1px solid var(--border);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{
  box-shadow:0 8px 22px rgba(15,45,85,.05);
}
.brand-row{
  height:62px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-mark{
  width:36px;
  height:36px;
  border-radius:9px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--primary);
  color:#fff;
  font-size:20px;
  font-weight:700;
  box-shadow:0 6px 14px rgba(47,123,224,.24);
}
.brand-name{
  font-size:22px;
  font-weight:700;
  letter-spacing:.5px;
  color:var(--text);
}
.brand-tools{
  display:flex;
  align-items:center;
  gap:8px;
}
.icon-btn{
  width:38px;
  height:38px;
  border-radius:9px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--muted);
  background:#F4F8FC;
  transition:all .2s ease;
}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{
  background:var(--primary-soft);
  color:var(--primary);
}
.m-nav-btn{display:none}
.channel-row{
  border-top:1px solid #EDF2F7;
  min-height:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.nav-list{
  display:flex;
  align-items:center;
  gap:34px;
}
.nav-list a{
  display:inline-flex;
  align-items:center;
  height:46px;
  font-size:15px;
  font-weight:500;
  color:#334155;
  border-bottom:2px solid transparent;
  transition:color .2s ease;
}
.nav-list a:hover{
  color:var(--primary);
}
.nav-list a.active{
  color:var(--primary);
  border-bottom-color:var(--primary);
  font-weight:600;
}
.trend-tags{
  display:flex;
  align-items:center;
  gap:12px;
}
.trend-title{
  display:inline-flex;
  align-items:center;
  gap:5px;
  font-size:12px;
  color:var(--muted);
  letter-spacing:.4px;
}
.trend-title svg{width:15px;height:15px;color:var(--gold)}
.trend-tag{
  font-size:12px;
  color:var(--muted);
  padding:4px 12px;
  background:#F4F9FD;
  border-radius:99px;
  transition:all .2s ease;
}
.trend-tag:hover{
  color:var(--primary);
  background:var(--primary-soft);
}
/* search overlay */
.search-overlay{
  position:fixed;
  inset:0;
  z-index:110;
  background:rgba(15,30,55,.34);
  display:flex;
  align-items:flex-start;
  justify-content:center;
  padding:14vh 20px 20px;
  opacity:0;
  pointer-events:none;
  transition:opacity .2s ease;
}
.search-overlay.is-open{
  opacity:1;
  pointer-events:auto;
}
.search-panel{
  width:100%;
  max-width:600px;
  background:#fff;
  border-radius:16px;
  box-shadow:var(--shadow-md);
  padding:14px;
}
.search-panel form{
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px 10px;
  border:1px solid var(--border);
  border-radius:11px;
}
.search-panel form:focus-within{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(47,123,224,.12);
}
.search-panel input{
  border:none;
  outline:none;
  flex:1;
  padding:10px 4px;
  font-size:15px;
  background:transparent;
  color:var(--text);
}
.search-panel input::placeholder{color:#94A3B8}
.search-submit{
  background:var(--primary);
  color:#fff;
  border-radius:8px;
  padding:9px 18px;
  font-size:14px;
  transition:background .2s ease;
}
.search-submit:hover{background:var(--primary-dark)}
.search-shortcut{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  padding:12px 8px 4px;
}
.search-shortcut span{
  font-size:12px;
  color:var(--muted);
}
.search-shortcut a{
  font-size:12px;
  padding:2px 10px;
  border-radius:99px;
  background:#f1f6fb;
  color:#475569;
}
.search-shortcut a:hover{
  background:var(--primary-soft);
  color:var(--primary);
}
/* mobile drawer */
.mobile-drawer{
  display:none;
}
/* main sections */
main{
  overflow:hidden;
}
.section{
  padding:82px 0;
}
.section-soft{
  background:#EFF5FC;
}
.section-head{
  max-width:740px;
  margin-bottom:42px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--primary);
  font-weight:600;
  letter-spacing:1px;
  text-transform:uppercase;
  background:var(--primary-soft);
  padding:5px 12px;
  border-radius:99px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:6px;
  height:6px;
  background:var(--primary);
  border-radius:50%;
}
.section-head h2{
  font-size:31px;
  line-height:1.4;
  font-weight:700;
  color:var(--text);
  margin-bottom:14px;
}
.section-head p{
  font-size:16px;
  color:var(--muted);
}
/* page hero */
.page-hero{
  background:linear-gradient(135deg,#F8FBFF 0%,var(--bg) 55%,#EDF5FF 100%);
  padding:74px 0 70px;
  position:relative;
}
.page-hero::before{
  content:"";
  position:absolute;
  width:340px;
  height:340px;
  left:-120px;
  top:-90px;
  background:radial-gradient(circle,rgba(47,123,224,.1),transparent 65%);
  pointer-events:none;
}
.hero-wrap{
  display:grid;
  grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);
  gap:58px;
  align-items:center;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  color:var(--muted);
  margin-bottom:20px;
}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb i{
  width:14px;
  height:14px;
  position:relative;
  color:#B9C9DA;
}
.breadcrumb i::before{
  content:">";
  font-style:normal;
  font-size:13px;
  line-height:1;
}
.hero-pill{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:13px;
  color:var(--teal);
  background:#e9f7f7;
  border-radius:99px;
  padding:5px 14px;
  font-weight:500;
  margin-bottom:18px;
}
.hero-pill svg{
  width:15px;
  height:15px;
}
.page-hero h1{
  font-size:37px;
  line-height:1.34;
  font-weight:700;
  color:var(--text);
  letter-spacing:.4px;
  margin-bottom:20px;
}
.page-hero h1 span{
  color:var(--primary);
}
.hero-lead{
  font-size:17px;
  line-height:1.9;
  color:#526581;
  max-width:540px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:24px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:9px;
  padding:14px 26px;
  font-size:15px;
  font-weight:600;
  transition:all .2s ease;
  line-height:1.4;
}
.btn svg{
  width:18px;
  height:18px;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
  box-shadow:0 8px 18px rgba(47,123,224,.22);
}
.btn-primary:hover{
  background:var(--primary-dark);
  transform:translateY(-2px);
  box-shadow:0 12px 24px rgba(47,123,224,.26);
}
.btn-primary:active{
  transform:translateY(0);
  filter:brightness(.96);
}
.btn-ghost{
  background:var(--white);
  color:var(--primary);
  border:1px solid #C7DBF0;
}
.btn-ghost:hover{
  border-color:var(--primary);
  background:var(--primary-soft);
  transform:translateY(-2px);
}
.hero-proof{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
}
.hero-proof li{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--muted);
}
.hero-proof svg{
  width:16px;
  height:16px;
  color:var(--teal);
}
.hero-visual{
  position:relative;
}
.hero-window{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  box-shadow:var(--shadow-md);
  overflow:hidden;
}
.window-bar{
  display:flex;
  align-items:center;
  gap:8px;
  background:linear-gradient(#fff,#F6FAFF);
  padding:10px 14px;
  border-bottom:1px solid var(--border);
}
.window-dot{
  width:10px;
  height:10px;
  border-radius:50%;
}
.window-dot:nth-child(1){background:#F47272}
.window-dot:nth-child(2){background:#F0B34B}
.window-dot:nth-child(3){background:#22B07D}
.window-address{
  flex:1;
  margin-left:12px;
  background:#F1F6FC;
  border-radius:7px;
  padding:4px 12px;
  font-size:12px;
  color:var(--muted);
  max-width:260px;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.window-body{
  background:#F9FBFE;
  min-height:280px;
  display:flex;
  align-items:stretch;
}
.window-body img{
  width:100%;
  height:300px;
  object-fit:cover;
  border-radius:0 0 16px 16px;
}
.hero-float-card{
  position:absolute;
  right:-12px;
  bottom:-22px;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:var(--shadow-md);
  border-radius:14px;
  padding:14px 18px;
  width:212px;
  display:flex;
  align-items:center;
  gap:12px;
}
.hero-float-card .float-icon{
  width:38px;
  height:38px;
  border-radius:9px;
  background:var(--teal-soft);
  color:var(--teal);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
}
.hero-float-card p{
  font-size:13px;
  color:var(--text);
  font-weight:600;
  line-height:1.5;
}
.hero-float-card small{
  color:var(--muted);
  font-size:12px;
  display:block;
}
/* entry catalog */
.entry-layout{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:30px;
  align-items:stretch;
}
.entry-stack{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.entry-card{
  background:#fff;
  border-radius:14px;
  padding:24px 26px;
  display:flex;
  gap:20px;
  align-items:flex-start;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(220,231,241,.6);
  transition:transform .25s ease, box-shadow .25s ease;
}
.entry-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
}
.entry-index{
  font-size:26px;
  font-weight:700;
  color:#CFE1F2;
  line-height:1;
  min-width:39px;
  margin-top:3px;
}
.entry-icon{
  width:46px;
  height:46px;
  flex-shrink:0;
  border-radius:11px;
  background:var(--primary-soft);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
}
.entry-icon svg{
  width:23px;
  height:23px;
}
.entry-body h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:6px;
  color:var(--text);
}
.entry-body p{
  font-size:14px;
  color:var(--muted);
  line-height:1.8;
}
.entry-link{
  display:inline-flex;
  align-items:center;
  gap:5px;
  font-size:14px;
  color:var(--primary);
  font-weight:500;
  margin-top:8px;
  transition:gap .2s ease;
}
.entry-link:hover{
  gap:9px;
}
.entry-aside{
  background:#fff;
  border-radius:16px;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(220,231,241,.6);
  overflow:hidden;
  display:flex;
  flex-direction:column;
}
.entry-aside img{
  width:100%;
  height:200px;
  object-fit:cover;
}
.aside-content{
  padding:22px 24px 26px;
}
.aside-content h3{
  font-size:18px;
  font-weight:700;
  color:var(--text);
  margin-bottom:14px;
}
.aside-check-list li{
  position:relative;
  padding:8px 0 8px 32px;
  color:#475569;
  font-size:14px;
  border-bottom:1px dashed #E3ECF5;
}
.aside-check-list li:last-child{border-bottom:none}
.aside-check-list li::before{
  content:"";
  position:absolute;
  left:4px;
  top:15px;
  width:16px;
  height:16px;
  border-radius:50%;
  background:url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><path fill="none" stroke="%230FA3A3" stroke-width="2.2" d="M5 10l3.2 3.2L15 6.5"/></svg>') center/contain no-repeat;
}
/* feature bands */
.feature-band{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  background:#fff;
  border-radius:18px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(220,231,241,.6);
  margin-bottom:30px;
  transition:box-shadow .25s ease;
}
.feature-band:hover{
  box-shadow:var(--shadow-md);
}
.feature-band.reversed .band-media{
  order:2;
}
.band-media{
  min-height:260px;
  position:relative;
  background:#F0F7FE;
}
.band-media img{
  position:absolute;
  width:100%;
  height:100%;
  object-fit:cover;
}
.band-body{
  padding:46px 52px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.band-body .tag{
  align-self:flex-start;
}
.band-body h3{
  font-size:24px;
  font-weight:700;
  line-height:1.5;
  color:var(--text);
  margin:16px 0 14px;
}
.band-body p{
  color:var(--muted);
  font-size:15px;
  margin-bottom:20px;
  line-height:1.9;
}
.band-list{
  display:grid;
  gap:12px;
  margin-top:4px;
}
.band-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:#475569;
  font-size:14px;
}
.band-list svg{
  width:18px;
  height:18px;
  flex-shrink:0;
  color:var(--teal);
  margin-top:5px;
}
.tag{
  display:inline-flex;
  align-items:center;
  font-size:12px;
  font-weight:500;
  color:var(--teal);
  background:var(--teal-soft);
  border-radius:99px;
  padding:4px 13px;
}
/* flow */
.flow-grid{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:22px;
}
.flow-item{
  background:var(--white);
  border:1px solid rgba(220,231,241,.74);
  border-radius:16px;
  padding:26px 24px;
  box-shadow:var(--shadow-sm);
  position:relative;
  transition:transform .25s ease, box-shadow .25s ease;
}
.flow-item:hover{
  transform:translateY(-3px);
  box-shadow:var(--shadow-md);
}
.flow-num{
  font-size:12px;
  font-weight:700;
  letter-spacing:1px;
  color:var(--primary);
  background:var(--primary-soft);
  display:inline-block;
  border-radius:99px;
  padding:3px 12px;
  margin-bottom:18px;
}
.flow-arrow{
  position:absolute;
  top:38px;
  right:-18px;
  width:16px;
  color:#B7D0EA;
  z-index:2;
  display:none;
}
.flow-arrow svg{width:15px;height:15px}
.flow-item h3{
  font-size:17px;
  font-weight:700;
  margin-bottom:12px;
}
.flow-item p{
  font-size:14px;
  color:var(--muted);
  line-height:1.8;
}
/* table section */
.table-intro{
  max-width:680px;
}
.spec-table{
  background:#fff;
  border-radius:16px;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(220,231,241,.7);
  overflow:hidden;
}
.spec-table table{
  width:100%;
  border-collapse:collapse;
}
.spec-table th{
  background:#F3F8FD;
  text-align:left;
  font-size:13px;
  font-weight:600;
  color:#526581;
  padding:14px 20px;
}
.spec-table td{
  padding:18px 20px;
  border-top:1px solid #EDF2F7;
  font-size:14px;
  color:#475569;
  vertical-align:top;
  line-height:1.8;
}
.spec-table td strong{
  color:var(--text);
  font-weight:600;
}
.spec-status{
  display:inline-flex;
  align-items:center;
  gap:5px;
  font-size:12px;
  color:var(--teal);
  background:var(--teal-soft);
  border-radius:99px;
  padding:3px 10px;
  margin-top:4px;
}
.spec-status::before{
  content:"";
  width:5px;
  height:5px;
  border-radius:50%;
  background:currentColor;
}
/* faq */
.faq-center{
  max-width:860px;
  margin:0 auto;
}
.faq-list{
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq-item{
  background:#fff;
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  transition:box-shadow .2s ease;
}
.faq-item.active{
  box-shadow:var(--shadow-sm);
}
.faq-q button{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:22px;
  padding:20px 24px;
  text-align:left;
  background:transparent;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  line-height:1.55;
  transition:color .2s ease;
}
.faq-q button:hover,
.faq-item.active .faq-q button{
  color:var(--primary);
}
.faq-icon{
  width:26px;
  height:26px;
  flex-shrink:0;
  border-radius:7px;
  background:#F1F7FD;
  color:var(--muted);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:transform .25s ease, background .2s ease, color .2s ease;
}
.faq-icon svg{
  width:15px;
  height:15px;
}
.faq-item.active .faq-icon{
  transform:rotate(45deg);
  background:var(--primary);
  color:#fff;
}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .28s ease;
}
.faq-a-inner{
  padding:0 24px 22px;
  color:var(--muted);
  font-size:15px;
  line-height:1.9;
  border-top:1px solid #EDF3F9;
  padding-top:18px;
  margin:0 24px 22px;
  padding-left:0;
  padding-right:0;
}
.faq-a-inner p{
  /* empty */
}
/* cta */
.cta-box{
  background:#fff;
  border-radius:20px;
  box-shadow:var(--shadow-sm);
  border:1px solid rgba(220,231,241,.7);
  padding:46px 52px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  flex-wrap:wrap;
  position:relative;
  overflow:hidden;
}
.cta-box::after{
  content:"";
  position:absolute;
  right:-80px;
  top:-70px;
  width:230px;
  height:230px;
  background:radial-gradient(circle,rgba(47,123,224,.12),transparent 70%);
  pointer-events:none;
}
.cta-copy h2{
  font-size:25px;
  font-weight:700;
  margin-bottom:8px;
}
.cta-copy p{
  color:var(--muted);
  font-size:15px;
  max-width:630px;
}
.cta-actions{
  display:flex;
  gap:13px;
  flex-wrap:wrap;
  position:relative;
  z-index:1;
}
/* footer */
.site-footer{
  background:#0F1B2C;
  color:#A9BEDA;
  margin-top:80px;
  padding-top:66px;
}
.footer-top{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr;
  gap:46px;
  padding-bottom:46px;
  border-bottom:1px solid rgba(255,255,255,.09);
}
.footer-brand .brand-name{
  color:#fff;
}
.footer-brand .brand-mark{
  background:#fff;
  color:var(--primary);
  box-shadow:none;
}
.footer-col p{
  margin-top:18px;
  font-size:14px;
  line-height:1.9;
  color:#8DA6C0;
  max-width:360px;
}
.footer-col h4{
  color:#fff;
  font-size:16px;
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul a{
  font-size:14px;
  color:#8DA6C0;
  transition:color .2s ease, padding-left .2s ease;
}
.footer-col ul a:hover{
  color:#fff;
  padding-left:4px;
}
.footer-bottom{
  padding:22px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:#6E89A5;
}
/* focus visible */
a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:3px;
  border-radius:6px;
}
/* responsive */
@media (max-width:1024px){
  .hero-wrap{
    grid-template-columns:1fr;
    gap:42px;
  }
  .feature-band{
    grid-template-columns:1fr;
  }
  .feature-band.reversed .band-media{
    order:0;
  }
  .band-media{
    min-height:240px;
    position:relative;
  }
  .flow-arrow{
    display:none;
  }
}
@media (max-width:900px){
  .channel-row{
    display:none;
  }
  .m-nav-btn{
    display:inline-flex;
  }
  .mobile-drawer{
    position:absolute;
    top:62px;
    left:0;
    right:0;
    background:#fff;
    border-bottom:1px solid var(--border);
    display:block;
    max-height:0;
    overflow:hidden;
    transition:max-height .3s ease;
    box-shadow:0 20px 36px rgba(15,45,85,.08);
  }
  .mobile-drawer.is-open{
    max-height:560px;
  }
  .drawer-inner{
    padding:16px 24px 22px;
  }
  .drawer-nav{
    display:flex;
    flex-direction:column;
  }
  .drawer-nav a{
    display:block;
    padding:12px 6px;
    font-size:15px;
    font-weight:500;
    border-bottom:1px solid #EEF4FA;
    color:#334155;
  }
  .drawer-nav a.active{
    color:var(--primary);
    font-weight:600;
  }
  .drawer-trend{
    padding:16px 0 4px;
  }
  .drawer-trend p{
    font-size:13px;
    color:var(--muted);
    margin-bottom:8px;
  }
  .drawer-trend a{
    display:inline-block;
    font-size:13px;
    color:#4B6B88;
    background:#F5F8FC;
    padding:4px 12px;
    border-radius:99px;
    margin:0 8px 8px 0;
  }
  .footer-top{
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width:768px){
  .section{
    padding:52px 0;
  }
  .section-head h2{
    font-size:27px;
  }
  .page-hero{
    padding:48px 0 56px;
  }
  .page-hero h1{
    font-size:30px;
  }
  .hero-lead{
    font-size:16px;
  }
  .hero-visual{
    margin-top:10px;
  }
  .window-body img{
    height:250px;
  }
  .hero-float-card{
    position:relative;
    right:auto;
    bottom:auto;
    width:100%;
    margin-top:16px;
    box-shadow:var(--shadow-sm);
  }
  .entry-layout{
    grid-template-columns:1fr;
  }
  .entry-card{
    flex-wrap:wrap;
  }
  .entry-index{
    display:none;
  }
  .flow-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .band-body{
    padding:34px 26px;
  }
  .spec-table{
    overflow:visible;
  }
  .spec-table table{
    border:none;
  }
  .spec-table thead{
    display:none;
  }
  .spec-table tbody{
    display:flex;
    flex-direction:column;
    gap:14px;
  }
  .spec-table tr{
    background:#fff;
    border:1px solid var(--border);
    border-radius:13px;
    padding:6px 4px;
    display:block;
  }
  .spec-table td{
    display:flex;
    flex-wrap:wrap;
    gap:2px 16px;
    border:none;
    padding:10px 18px;
  }
  .spec-table td::before{
    content:attr(data-label);
    font-size:12px;
    color:var(--muted);
    width:92px;
    flex-shrink:0;
    font-weight:500;
  }
  .spec-table td strong{
    width:auto;
  }
  .faq-a-inner{
    margin:0 18px 16px;
    padding:16px 0 0;
    margin-bottom:16px;
  }
  .cta-box{
    padding:32px 24px;
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:30px;
  }
  .footer-bottom{
    justify-content:center;
    text-align:center;
  }
}
@media (max-width:520px){
  .brand-name{
    font-size:19px;
  }
  .hero-wrap{
    gap:28px;
  }
  .page-hero h1{
    font-size:27px;
  }
  .hero-actions,.btn{
    width:100%;
  }
  .btn{
    padding:13px 16px;
  }
  .flow-grid{
    grid-template-columns:1fr;
  }
  .entry-card{
    padding:20px;
  }
  .entry-icon{
    width:40px;
    height:40px;
  }
  .entry-body p{
    font-size:13px;
  }
  .band-list li{
    font-size:13px;
  }
  .spec-table td::before{
    width:80px;
  }
  .cta-actions{
    width:100%;
  }
  .cta-actions .btn{
    width:100%;
  }
  .brand-tools .icon-btn{
    width:36px;
    height:36px;
  }
}

/* roulang page: category3 */
:root {
  --primary: #2F7BE0;
  --primary-dark: #1765c4;
  --primary-light: #eaf1fb;
  --teal: #0FA3A3;
  --teal-light: #e6f7f6;
  --gold: #F0B34B;
  --gold-light: #fdf4e0;
  --bg: #f5f8fc;
  --card-bg: #ffffff;
  --text-main: #1E293B;
  --text-second: #64748B;
  --border: #DCE7F1;
  --shadow-sm: 0 1px 2px rgba(15,45,85,.04), 0 8px 20px rgba(15,45,85,.06);
  --shadow-hover: 0 12px 28px rgba(15,45,85,.1);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --container: 1200px;
  --transition: .2s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--primary);
  outline: none;
}

ul,
ol,
dl,
dd,
p,
h1,
h2,
h3,
h4,
h5 {
  margin: 0;
  padding: 0;
}

button,
input {
  font-family: inherit;
}

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: #334155;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.icon-btn svg {
  width: 21px;
  height: 21px;
}

.icon-btn:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.icon-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ========== header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .98);
  border-bottom: 1px solid var(--border);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 66px;
  padding: 10px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #3d8bf2, #2f6edb);
  color: #fff;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .5px;
  box-shadow: 0 6px 14px rgba(47, 123, 224, .24);
}

.brand-name {
  font-size: 21px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: .5px;
}

.brand-tools {
  display: flex;
  align-items: center;
  gap: 6px;
}

.m-nav-btn {
  display: none;
}

.search-panel {
  display: none;
  max-height: 0;
  overflow: hidden;
  background: #fff;
  border-bottom: 1px solid var(--border);
  transition: max-height .25s ease;
}

.search-panel.show {
  max-height: 92px;
  border-bottom-color: #cbd9e8;
}

.search-panel-inner {
  padding: 12px 0 16px;
}

.search-wrap {
  display: flex;
  gap: 8px;
}

.search-wrap input {
  width: 100%;
  min-height: 42px;
  padding: 0 14px;
  font-size: 15px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fafc;
  color: var(--text-main);
  transition: box-shadow .2s ease, border-color .2s ease;
}

.search-wrap input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(47, 123, 224, .18);
  outline: none;
  background: #fff;
}

.search-wrap select {
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text-main);
  cursor: pointer;
}

.channel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-list a {
  display: block;
  padding: 10px 14px 13px;
  font-size: 15px;
  font-weight: 600;
  color: #334155;
  border-bottom: 2px solid transparent;
  border-radius: 4px 4px 0 0;
}

.nav-list a:hover {
  color: var(--primary);
  background: rgba(47, 123, 224, .04);
}

.nav-list a.active {
  color: var(--primary);
  border-bottom-color: var(--primary-dark);
}

.trend-tags {
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  padding-bottom: 6px;
}

.trend-title {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-second);
  margin-right: 8px;
}

.trend-title svg {
  width: 14px;
  height: 14px;
  color: var(--gold);
}

.trend-tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 999px;
  background: #f0f4fa;
  color: #556580;
  transition: background var(--transition), color var(--transition);
}

.trend-tag:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* ========== hero ========== */
.hero-section {
  position: relative;
  padding: 64px 0 76px;
  background: linear-gradient(180deg, #ffffff 0%, #eaf2fc 100%);
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: 520px auto;
  background-repeat: no-repeat;
  background-position: 110% 10%;
  opacity: .5;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 44% 56%;
  gap: 52px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 36px;
  line-height: 1.38;
  font-weight: 800;
  letter-spacing: -.5px;
  margin-bottom: 18px;
}

.hero-copy h1 span {
  color: var(--primary);
  font-weight: 800;
}

.hero-sub {
  font-size: 16px;
  color: var(--text-second);
  line-height: 1.85;
  margin: 16px 0 28px;
  max-width: 540px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  border: 0;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), color var(--transition), border-color var(--transition);
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 16px rgba(47, 123, 224, .22);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 12px 20px rgba(47, 123, 224, .28);
}

.btn-primary:active {
  transform: translateY(0);
  filter: brightness(.96);
}

.btn-secondary {
  background: #fff;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn-secondary:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.btn-ghost {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-second);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: #fafcff;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  margin-top: 26px;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-second);
}

.hero-meta-item svg {
  width: 15px;
  height: 15px;
  color: var(--teal);
}

.hero-visual {
  position: relative;
  min-height: 300px;
}

.visual-mock {
  position: relative;
  max-width: 520px;
  margin-left: auto;
  background: #fff;
  border: 1px solid #dbe6f0;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.mock-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: #eef2f7;
}

.mock-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #c3d0e0;
}

.mock-url {
  margin-left: 8px;
  font-size: 12px;
  color: #7a8aa0;
  background: #fff;
  padding: 2px 12px;
  border-radius: 999px;
}

.mock-content img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.visual-mock-back {
  position: absolute;
  z-index: -1;
  top: 34px;
  right: -14px;
  width: 80%;
  height: 100%;
  border-radius: 16px;
  border: 1px solid #e6edf4;
  background: #f7faff;
  transform: rotate(3deg);
}

.breadcrumb-bar {
  padding: 13px 0;
  border-bottom: 1px solid #e7eef5;
  background: #fbfcfe;
}

.breadcrumb {
  font-size: 13px;
  color: var(--text-second);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #9fb0c3;
}

.breadcrumb .cur {
  color: #1f2b38;
  font-weight: 600;
}

/* ========== section ========== */
.section-block {
  padding: 88px 0;
}

.section-block.compact {
  padding: 64px 0;
}

.section-head {
  max-width: 860px;
  margin-bottom: 48px;
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
}

.section-eyebrow {
  display: inline-block;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: 30px;
  line-height: 1.4;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -.3px;
  margin-bottom: 12px;
}

.section-head p {
  font-size: 15px;
  color: var(--text-second);
}

/* feature intro */
.feature-grid {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 28px;
  align-items: stretch;
}

.picture-card {
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.picture-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 260px;
}

.picture-card .picture-overlay {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 18px;
  background: rgba(255, 255, 255, .9);
  backdrop-filter: none;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
}

.picture-overlay strong {
  display: block;
  font-size: 15px;
  color: var(--text-main);
  margin-bottom: 4px;
}

.picture-overlay span {
  font-size: 13px;
  color: var(--text-second);
}

.info-card-stack {
  display: grid;
  gap: 16px;
}

.info-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 24px 26px;
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--primary);
  transition: box-shadow var(--transition), transform var(--transition);
}

.info-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.info-card.compact-card {
  border-left-color: var(--teal);
}

.info-card .card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 14px;
}

.info-card.compact-card .card-icon {
  background: var(--teal-light);
  color: var(--teal);
}

.info-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.info-card p {
  font-size: 14px;
  color: var(--text-second);
  line-height: 1.8;
}

/* ============ spec table ========== */
.guide-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.spec-table-wrap {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.table-scroll {
  overflow-x: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 820px;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 16px 18px;
  border-bottom: 1px solid #eaf0f5;
  font-size: 14px;
}

.spec-table thead th {
  background: #f7fafc;
  color: #293548;
  font-weight: 700;
  white-space: nowrap;
  padding: 15px 18px;
}

.spec-table tbody tr:last-child td {
  border-bottom: 0;
}

.spec-table tbody tr:nth-child(even) {
  background: #fbfdff;
}

.spec-table .platform-cell {
  font-weight: 700;
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}

.pill-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 12px;
}

.badge-teal {
  display: inline-block;
  padding: 2px 10px;
  background: var(--teal-light);
  border-radius: 999px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 700;
}

.badge-gold {
  display: inline-block;
  padding: 2px 10px;
  background: var(--gold-light);
  border-radius: 999px;
  color: #a6741b;
  font-size: 12px;
  font-weight: 700;
}

.table-note {
  font-size: 13px;
  color: var(--text-second);
  padding: 8px 4px 0;
}

/* ============ steps ========== */
.step-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step-card {
  background: var(--card-bg);
  padding: 28px 22px 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}

.step-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.step-card::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 12px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 1px;
  margin-bottom: 10px;
}

.step-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-second);
}

/* ============ scenario cards ========== */
.scene-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  grid-template-rows: 1fr 1fr;
  gap: 20px;
}

.scene-card {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 24px 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.scene-card:first-child {
  grid-row: 1 / 3;
  flex-direction: column;
  background: linear-gradient(180deg, #f7faff, #fff);
  padding: 0;
  overflow: hidden;
}

.scene-card:first-child img {
  width: 100%;
  height: 210px;
  object-fit: cover;
}

.scene-card:first-child h3 {
  padding: 0 24px;
}

.scene-card:first-child p {
  padding: 0 24px 24px;
}

.scene-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  background: var(--gold-light);
  border-radius: 12px;
  color: #b67f1f;
  font-size: 22px;
  font-weight: 700;
}

.scene-card:nth-child(2) .scene-icon {
  background: var(--teal-light);
  color: var(--teal);
}

.scene-card:nth-child(3) .scene-icon {
  background: var(--primary-light);
  color: var(--primary);
}

.scene-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 6px;
}

.scene-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-second);
}

/* ============ comparison download CTA ========== */
.download-resume-section {
  background: linear-gradient(180deg, #f5f8fc, #eAF2fc);
  border-top: 1px solid var(--border);
}

.download-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  background: #fff;
  border-radius: 20px;
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.download-copy h2 {
  font-size: 24px;
  line-height: 1.5;
  font-weight: 800;
  margin-bottom: 12px;
}

.download-copy p {
  color: var(--text-second);
  font-size: 14px;
  line-height: 1.8;
  max-width: 480px;
}

.download-btns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.download-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  text-align: center;
  transition: all var(--transition);
}

.download-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.download-item strong {
  display: block;
  font-size: 14px;
  color: var(--text-main);
  margin: 8px 0 2px;
}

.download-item small {
  display: block;
  font-size: 12px;
  color: var(--text-second);
  margin-bottom: 10px;
}

.download-item .btn {
  min-height: 34px;
  padding: 0 12px;
  font-size: 13px;
}

/* ============ FAQ ========== */
.faq-section {
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.faq-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.faq-item:focus-within,
.faq-item.open {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 17px 22px;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  transition: color var(--transition);
}

.faq-q:hover {
  color: var(--primary);
}

.faq-q:focus-visible {
  outline: 2px solid var(--primary);
  border-radius: 8px;
}

.faq-q svg {
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  transition: transform .25s ease, color .25s ease;
  color: var(--text-second);
}

.faq-item.open .faq-q svg {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}

.faq-a-inner {
  padding: 0 22px 20px;
  border-top: 1px solid #eef3f8;
  margin-top: 4px;
  background: #f9fbfd;
  border-radius: 0 0 14px 14px;
}

.faq-a-inner p {
  font-size: 14px;
  color: var(--text-second);
  line-height: 1.9;
  padding-top: 15px;
}

/* ============ final CTA ========== */
.cta-section {
  padding: 72px 0 88px;
  background: var(--bg);
}

.cta-card {
  position: relative;
  background: #fff;
  border-radius: 20px;
  padding: 44px 48px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.cta-card::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(47, 123, 224, .06);
}

.cta-card h2 {
  font-size: 25px;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--text-main);
}

.cta-card p {
  color: var(--text-second);
  font-size: 14px;
  max-width: 600px;
}

.cta-action {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============ footer ========== */
.site-footer {
  background: #fff;
  border-top: 1px solid var(--border);
  padding-top: 60px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 40px;
}

.footer-brand .brand-name {
  font-size: 20px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-second);
  line-height: 1.9;
  max-width: 360px;
  margin-top: 16px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
  color: #263445;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col a {
  font-size: 14px;
  color: #5b6b7f;
}

.footer-col a:hover {
  color: var(--primary);
}

.footer-bottom {
  border-top: 1px solid #eaf0f5;
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-size: 12px;
  color: #93a3b5;
}

/* ============ global response ========== */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .hero-copy h1 {
    font-size: 30px;
  }

  .channel-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
  }

  .trend-tags {
    padding: 6px 0 8px;
    overflow-x: auto;
    max-width: 100%;
    scrollbar-width: thin;
  }

  .nav-list {
    flex-wrap: wrap;
    width: 100%;
  }

  .section-block {
    padding: 72px 0;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .step-wrap {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .m-nav-btn {
    display: inline-flex;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 0;
    padding: 8px 0 16px;
  }

  .nav-list.show {
    display: flex;
  }

  .nav-list a {
    border-bottom: 0;
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 15px;
  }

  .nav-list a.active {
    background: var(--primary-light);
    color: var(--primary);
  }

  .trend-tags {
    display: none;
  }

  .hero-section {
    padding: 44px 0 60px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: 2;
  }

  .visual-mock {
    max-width: 100%;
  }

  .visual-mock-back {
    display: none;
  }

  .breadcrumb-bar {
    overflow-x: auto;
    white-space: nowrap;
  }

  .section-block {
    padding: 56px 0;
  }

  .section-head {
    margin-bottom: 32px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .feature-grid,
  .download-block {
    grid-template-columns: 1fr;
  }

  .picture-card img {
    height: 240px;
    min-height: auto;
  }

  .scene-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .scene-card:first-child {
    grid-row: auto;
  }

  .download-block {
    padding: 26px 22px;
  }

  .download-btns {
    grid-template-columns: 1fr;
  }

  .cta-card {
    padding: 32px 24px;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .footer-top .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .container {
    width: calc(100% - 32px);
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 17px;
  }

  .brand-row {
    min-height: 58px;
  }

  .hero-copy h1 {
    font-size: 27px;
  }

  .hero-sub {
    font-size: 15px;
  }

  .button-row .btn {
    width: 100%;
  }

  .step-wrap {
    grid-template-columns: 1fr;
  }

  .info-card {
    padding: 18px;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.7;
  }
}

/* roulang page: category2 */
:root {
  --primary: #2F7BE0;
  --primary-dark: #1F60B8;
  --primary-soft: #E9F1FC;
  --accent: #0FA3A3;
  --gold: #F0B34B;
  --bg: #F5F8FC;
  --card: #FFFFFF;
  --text: #1E293B;
  --muted: #64748B;
  --border: #DCE7F1;
  --shadow-sm: 0 1px 2px rgba(15, 45, 85, 0.04), 0 8px 20px rgba(15, 45, 85, 0.06);
  --shadow-lg: 0 12px 28px rgba(15, 45, 85, 0.1);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --space-section: 88px;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd {
  margin: 0;
}
ul,
ol {
  padding: 0;
  list-style: none;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  display: block;
}
button,
input {
  font: inherit;
  border: none;
  background: none;
}
button {
  cursor: pointer;
}
:focus,
summary:focus-visible,
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(47, 123, 224, 0.3);
  outline-offset: 2px;
}
.container {
  width: 100%;
  max-width: 1216px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid rgba(220, 231, 241, 0.8);
  box-shadow: 0 1px 2px rgba(15, 45, 85, 0.04);
}
.site-header .container {
  padding-top: 0;
  padding-bottom: 0;
}
.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 62px;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 19px;
}
.brand:hover {
  color: var(--text);
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
}
.brand-name {
  line-height: 1;
}
.brand-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}
.icon-btn:hover {
  color: var(--primary);
  border-color: rgba(47, 123, 224, 0.4);
  background: var(--primary-soft);
  transform: translateY(-1px);
}
.icon-btn svg {
  width: 19px;
  height: 19px;
}
.m-nav-btn {
  display: none;
}
.channel-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid rgba(220, 231, 241, 0.55);
  min-height: 48px;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
}
.nav-list a {
  display: block;
  padding: 12px 14px;
  color: #3c4a5c;
  font-size: 15px;
  font-weight: 500;
  border-bottom: 3px solid transparent;
  border-radius: 4px 4px 0 0;
  line-height: 1.2;
}
.nav-list a:hover {
  color: var(--primary);
  background: rgba(47, 123, 224, 0.05);
}
.nav-list a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 700;
}
.trend-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.trend-title {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}
.trend-title svg {
  width: 14px;
  height: 14px;
  color: var(--gold);
}
.trend-tag {
  display: inline-block;
  padding: 5px 12px;
  background: #EEF4FB;
  color: #315E8A;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
}
.trend-tag:hover {
  background: var(--primary);
  color: #fff;
}
.search-pop {
  position: absolute;
  top: 100%;
  right: 24px;
  z-index: 70;
  width: 320px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 18px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.search-pop.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.search-pop .sp-title {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 12px;
  font-weight: 500;
}
.search-pop a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}
.search-pop a:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
.search-pop a svg {
  width: 16px;
  height: 16px;
  color: var(--primary);
}
main {
  overflow: hidden;
}
.page-hero {
  background: linear-gradient(135deg, #ffffff 0%, #F1F7FE 100%);
  border-bottom: 1px solid rgba(220, 231, 241, 0.6);
}
.hero-inner {
  padding: 58px 0 56px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 22px;
}
.breadcrumb a {
  color: var(--muted);
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: #B8C6D6;
}
.breadcrumb .current {
  color: #2E3A48;
  font-weight: 500;
}
.hero-title {
  max-width: 920px;
  font-size: 36px;
  line-height: 1.35;
  font-weight: 800;
  color: #12203A;
  letter-spacing: -0.01em;
}
.hero-sub {
  max-width: 820px;
  margin-top: 18px;
  color: #41536A;
  font-size: 17px;
  line-height: 1.85;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 9px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.2s ease;
}
.btn svg {
  width: 17px;
  height: 17px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: 1px solid var(--primary);
  box-shadow: 0 8px 18px rgba(47, 123, 224, 0.22);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.96);
}
.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 1px solid rgba(47, 123, 224, 0.35);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid rgba(220, 231, 241, 0.8);
}
.hero-meta li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--muted);
}
.hero-meta svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
}
.section {
  padding: var(--space-section) 0;
}
.section-white {
  background: #fff;
}
.section-soft {
  background: #EDF4FB;
}
.section-head {
  max-width: 760px;
  margin-bottom: 40px;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.section-title {
  font-size: 29px;
  line-height: 1.4;
  font-weight: 800;
  color: #14243D;
}
.section-lead {
  margin-top: 14px;
  color: #53657C;
  font-size: 16px;
  max-width: 780px;
}
.check-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.check-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(220, 231, 241, 0.5);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  overflow: hidden;
}
.check-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.check-card::before {
  content: "";
  display: block;
  width: 36px;
  height: 4px;
  border-radius: 3px;
  background: var(--primary);
  margin-bottom: 18px;
}
.check-card:nth-child(2)::before {
  background: var(--accent);
}
.check-card:nth-child(3)::before {
  background: var(--gold);
}
.check-card .check-no {
  position: absolute;
  top: 22px;
  right: 22px;
  font-size: 34px;
  font-weight: 800;
  color: rgba(47, 123, 224, 0.1);
  line-height: 1;
}
.check-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #1E3A5F;
  margin-bottom: 12px;
}
.check-card p {
  font-size: 14px;
  color: #5A6B80;
  line-height: 1.8;
}
.dual-section {
  background: #fff;
  border-top: 1px solid rgba(220, 231, 241, 0.7);
  border-bottom: 1px solid rgba(220, 231, 241, 0.7);
}
.dual-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.85fr);
  gap: 42px;
  align-items: start;
}
.block-head {
  margin-bottom: 24px;
}
.block-head .eyebrow {
  margin-bottom: 10px;
}
.block-title {
  font-size: 27px;
  line-height: 1.4;
  font-weight: 800;
  color: #14243D;
}
.question-list {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}
.q-card {
  background: #fff;
  border: 1px solid #E2ECF7;
  border-radius: 14px;
  padding: 24px 26px;
  box-shadow: 0 4px 12px rgba(15, 45, 85, 0.04);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  position: relative;
}
.q-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.q-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.q-no {
  font-size: 13px;
  font-weight: 800;
  color: var(--primary);
  background: var(--primary-soft);
  border-radius: 8px;
  padding: 6px 12px;
  line-height: 1.2;
  flex: none;
  margin-top: 2px;
}
.q-head h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 700;
  color: #1A2C45;
  margin: 0;
}
.q-card > p {
  margin: 14px 0 0;
  padding-left: 0;
  color: #57687C;
  font-size: 15px;
  line-height: 1.85;
}
.q-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.q-tags a {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  background: #F6FAFF;
  border: 1px solid #E1EBF7;
  padding: 4px 10px;
  border-radius: 999px;
}
.q-tags a:hover {
  background: var(--primary);
  color: #fff;
}
.aside-column {
  position: sticky;
  top: 128px;
}
.aside-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  color: #243754;
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}
.aside-title svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
}
.aside-stack {
  display: grid;
  gap: 20px;
}
.aside-card {
  display: block;
  background: #fff;
  border: 1px solid #E2ECF7;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 4px 14px rgba(15, 45, 85, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.aside-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-3px);
}
.aside-media {
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #EAF1F9;
}
.aside-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.aside-card:hover .aside-media img {
  transform: scale(1.02);
}
.aside-body {
  padding: 14px 4px 2px;
}
.aside-body .mini-cat {
  display: inline-block;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  background: var(--primary-soft);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 8px;
}
.aside-body h3 {
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: #1A2C45;
  margin: 0 0 8px;
}
.aside-body p {
  color: #617284;
  font-size: 14px;
  line-height: 1.7;
}
.aside-link {
  margin-top: 12px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.aside-link svg {
  width: 15px;
  height: 15px;
  transition: transform 0.2s ease;
}
.aside-card:hover .aside-link svg {
  transform: translateX(3px);
}
.flow-section {
  position: relative;
}
.flow-wrap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  position: relative;
}
.step-item {
  position: relative;
  background: #fff;
  border-radius: 14px;
  padding: 26px 22px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(220, 231, 241, 0.6);
  z-index: 1;
}
.step-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  transition: all 0.2s ease;
}
.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-bottom: 16px;
}
.step-icon svg {
  width: 22px;
  height: 22px;
}
.step-item:nth-child(2) .step-icon {
  background: #E1F6F5;
  color: var(--accent);
}
.step-item:nth-child(3) .step-icon {
  background: #FDF1DF;
  color: #B77B1B;
}
.step-item:nth-child(4) .step-icon {
  background: #E8F0FD;
  color: #3B5BA5;
}
.step-no {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 30px;
  font-weight: 800;
  color: rgba(15, 45, 85, 0.06);
  line-height: 1;
}
.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: #1B2B3F;
  margin-bottom: 8px;
}
.step-item p {
  font-size: 14px;
  color: #627183;
  line-height: 1.8;
}
.signal-section {
  background: #fff;
  border-top: 1px solid rgba(220, 231, 241, 0.7);
  border-bottom: 1px solid rgba(220, 231, 241, 0.7);
}
.signal-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: center;
}
.signal-copy h2 {
  font-size: 28px;
  line-height: 1.45;
  font-weight: 800;
  color: #132642;
  margin-bottom: 16px;
}
.signal-copy p {
  color: #586980;
  font-size: 16px;
  line-height: 1.85;
}
.signal-list {
  display: grid;
  gap: 12px;
}
.signal-item {
  background: #F8FBFE;
  border-radius: 12px;
  padding: 18px 20px;
  border-left: 4px solid #D5A84C;
  border: 1px solid #EDE4CF;
}
.signal-item strong {
  display: block;
  color: #3A2F18;
  font-size: 16px;
  margin-bottom: 6px;
}
.signal-item span {
  display: block;
  color: #6C634F;
  font-size: 14px;
  line-height: 1.8;
}
.signal-item.danger {
  border-left-color: #C96442;
  border-color: #EDDAD3;
}
.signal-item.danger strong {
  color: #6D2E1B;
}
.signal-item.danger span {
  color: #7C5A4D;
}
.faq-section .section-head {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.faq-panel {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border-radius: 14px;
  border: 1px solid #E2ECF7;
  box-shadow: 0 4px 12px rgba(15, 45, 85, 0.03);
  overflow: hidden;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.faq-item[open] {
  border-color: rgba(47, 123, 224, 0.35);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 600;
  color: #25364A;
  font-size: 16px;
  line-height: 1.6;
  transition: color 0.2s ease;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  color: var(--primary);
}
.faq-arrow {
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: transform 0.2s ease, background-color 0.2s ease;
}
.faq-arrow svg {
  width: 16px;
  height: 16px;
}
.faq-item[open] .faq-arrow {
  background: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 24px 24px;
  color: #5B6C81;
  line-height: 1.9;
  font-size: 15px;
  border-top: 1px solid #EDF3F9;
  margin-top: 0;
}
.faq-answer p {
  padding-top: 18px;
}
.cta-section {
  padding-top: 40px;
  padding-bottom: 80px;
}
.cta-wrap {
  background: linear-gradient(135deg, #ffffff 0%, #EDF5FE 100%);
  border: 1px solid #DCEAF6;
  padding: 44px 46px;
  border-radius: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.cta-copy h2 {
  font-size: 24px;
  font-weight: 800;
  color: #152A45;
  line-height: 1.4;
  margin-bottom: 10px;
}
.cta-copy p {
  color: #56677A;
  font-size: 15px;
  line-height: 1.8;
  max-width: 720px;
}
.cta-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  flex: none;
}
.site-footer {
  background: #fff;
  border-top: 1px solid #E1EAF3;
  padding: 50px 0 24px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 38px;
}
.footer-col .brand {
  margin-bottom: 14px;
}
.footer-col p {
  color: #6B7B90;
  font-size: 14px;
  line-height: 1.85;
  max-width: 360px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #24344A;
  margin-bottom: 14px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: #627386;
  font-size: 14px;
}
.footer-col ul li a:hover {
  color: var(--primary);
}
.footer-bottom {
  border-top: 1px solid #EEF3F8;
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  color: #98A6B5;
  font-size: 13px;
}
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }
  .trend-tags {
    display: none;
  }
  .check-points {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
  }
  .check-card {
    padding: 24px 20px;
  }
  .check-card h3 {
    font-size: 17px;
  }
  .dual-wrap {
    grid-template-columns: 1fr;
  }
  .aside-column {
    position: static;
  }
  .aside-stack {
    grid-template-columns: repeat(3, 1fr);
  }
  .flow-wrap {
    grid-template-columns: repeat(2, 1fr);
  }
  .signal-layout {
    grid-template-columns: 1fr;
  }
  .cta-wrap {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 768px) {
  :root {
    --space-section: 52px;
  }
  .container {
    padding: 0 16px;
  }
  .m-nav-btn {
    display: inline-flex;
  }
  .brand-row {
    min-height: 56px;
  }
  .channel-row {
    display: block;
    border-top: none;
    min-height: 0;
  }
  .channel-row .nav-list {
    display: none;
    padding: 10px 0 16px;
  }
  .site-header.nav-open .nav-list {
    display: block;
  }
  .nav-list li {
    width: 100%;
  }
  .nav-list a {
    border-bottom: 1px solid #EDF3F9;
    border-radius: 8px;
    padding: 12px 8px;
    font-size: 15px;
  }
  .nav-list a.active {
    background: var(--primary-soft);
    border-bottom-color: transparent;
    color: var(--primary);
  }
  .search-pop {
    top: 56px;
    right: 12px;
    left: 12px;
    width: auto;
  }
  .hero-inner {
    padding: 40px 0 36px;
  }
  .hero-title {
    font-size: 27px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .section-title {
    font-size: 24px;
  }
  .block-title {
    font-size: 23px;
  }
  .check-points {
    grid-template-columns: 1fr;
  }
  .aside-stack {
    grid-template-columns: 1fr;
  }
  .flow-wrap {
    grid-template-columns: 1fr;
  }
  .cta-wrap {
    padding: 30px 24px;
  }
  .cta-copy h2 {
    font-size: 21px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
  }
}
@media (max-width: 520px) {
  .brand-name {
    font-size: 18px;
  }
  .q-card {
    padding: 20px;
  }
  .q-head {
    flex-wrap: wrap;
    gap: 10px;
  }
  .q-head h3 {
    font-size: 17px;
  }
  .aside-body h3 {
    font-size: 16px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-meta {
    flex-direction: column;
    gap: 8px;
  }
  .faq-item summary {
    padding: 16px 18px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 18px 20px;
  }
  .footer-bottom span:last-child {
    line-height: 1.6;
  }
}

/* roulang page: category4 */
:root {
            --primary: #2F7BE0;
            --primary-dark: #1f5bb0;
            --primary-light: #eaf2fc;
            --accent: #0FA3A3;
            --gold: #F0B34B;
            --bg: #F5F8FC;
            --card-bg: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #64748B;
            --border: #DCE7F1;
            --shadow-sm: 0 1px 2px rgba(15,45,85,0.04), 0 8px 20px rgba(15,45,85,0.06);
            --shadow-lg: 0 12px 28px rgba(15,45,85,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 999px;
            --container: 1200px;
            --gap: 24px;
            --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        body.no-scroll {
            overflow: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        a {
            text-decoration: none;
            color: var(--primary);
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
        }
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 56px 0;
        }
        .section-header {
            max-width: 840px;
            margin-bottom: 48px;
        }
        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            letter-spacing: .3px;
        }
        .section-title {
            font-size: 30px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.3px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            margin-top: 12px;
            line-height: 1.9;
        }
        .h2-sub {
            font-size: 13px;
            color: var(--primary);
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 6px;
            display: block;
        }

        /* Header */
        .site-header {
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(15, 45, 85, 0.07);
        }
        .site-header .container {
            padding-top: 4px;
            padding-bottom: 4px;
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 56px;
            gap: 16px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 9px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 8px rgba(47, 123, 224, .22);
        }
        .brand-name {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.2px;
        }
        .brand-tools {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .icon-btn {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: background .2s, color .2s;
        }
        .icon-btn:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .icon-btn svg {
            width: 20px;
            height: 20px;
        }
        .m-nav-btn {
            display: none;
        }
        .channel-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 46px;
            border-top: 1px solid transparent;
            gap: 20px;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-list a {
            display: inline-block;
            padding: 10px 14px;
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 15px;
            border-bottom: 2px solid transparent;
            transition: color .2s, border-color .2s;
        }
        .nav-list a:hover {
            color: var(--primary);
            border-bottom-color: var(--primary);
        }
        .nav-list a.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
        }
        .trend-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            flex-shrink: 0;
            max-width: 44%;
        }
        .trend-title {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .trend-title svg {
            width: 14px;
            height: 14px;
        }
        .trend-tag {
            padding: 3px 12px;
            background: rgba(47, 123, 224, 0.08);
            color: var(--primary);
            font-size: 12px;
            border-radius: var(--radius-full);
            white-space: nowrap;
            transition: background .2s;
        }
        .trend-tag:hover {
            background: rgba(47, 123, 224, 0.16);
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 300px;
            background: #fff;
            z-index: 200;
            transform: translateX(-105%);
            transition: transform .3s ease;
            box-shadow: 2px 0 20px rgba(0,0,0,0.1);
            padding: 20px;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .drawer-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }
        .drawer-close {
            font-size: 24px;
            color: var(--text-secondary);
        }
        .drawer-list a {
            display: block;
            padding: 12px 8px;
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            border-bottom: 1px solid #f1f5f9;
        }
        .drawer-list a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .drawer-trends {
            margin-top: 16px;
        }
        .drawer-trends .trend-tag {
            display: inline-block;
            margin: 6px 6px 0 0;
            font-size: 13px;
            padding: 5px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-full);
        }
        .overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, .4);
            z-index: 150;
            opacity: 0;
            visibility: hidden;
            transition: opacity .3s;
        }
        .overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* Search popup */
        .search-pop {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 300;
            background: #fff;
            padding: 24px 0;
            box-shadow: 0 6px 30px rgba(0, 0, 0, .15);
            transform: translateY(-120%);
            transition: transform .35s ease;
        }
        .search-pop.open {
            transform: translateY(0);
        }
        .search-input-wrap {
            display: flex;
            align-items: center;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 4px 4px 4px 18px;
            background: var(--bg);
            max-width: 680px;
            margin: 0 auto;
            transition: box-shadow .2s;
        }
        .search-input-wrap:focus-within {
            box-shadow: 0 0 0 3px rgba(47, 123, 224, 0.25);
            border-color: var(--primary);
        }
        .search-input-wrap input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            padding: 12px 6px;
            font-size: 16px;
            color: var(--text);
        }
        .search-input-wrap button {
            background: var(--primary);
            color: #fff;
            padding: 10px 24px;
            border-radius: 8px;
            font-weight: 600;
            transition: background .2s;
        }
        .search-input-wrap button:hover {
            background: var(--primary-dark);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 15px;
            border: 1px solid transparent;
            transition: all 0.2s ease;
            cursor: pointer;
            line-height: 1;
            white-space: nowrap;
        }
        .btn svg {
            width: 17px;
            height: 17px;
        }
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(47, 123, 224, .25);
        }
        .btn:active {
            transform: translateY(0);
            box-shadow: none;
            filter: brightness(0.96);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover {
            background: var(--primary-light);
        }
        .btn-lg {
            padding: 15px 30px;
            font-size: 16px;
            border-radius: 10px;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .breadcrumb-bar .container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb-bar a {
            color: var(--text-secondary);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-sep {
            color: #cbd5e1;
            margin: 0 4px;
        }

        /* Hero */
        .hero-cat {
            background: linear-gradient(180deg, #fff 0%, #f0f6ff 100%);
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .hero-cat::before {
            content: "";
            position: absolute;
            right: -120px;
            top: -140px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(47, 123, 224, 0.10) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }
        .hero-cat .container {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 48px;
            align-items: center;
            padding-top: 48px;
            padding-bottom: 48px;
            position: relative;
            z-index: 2;
        }
        .hero-cat__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(47, 123, 224, 0.1);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 18px;
            letter-spacing: .2px;
        }
        .hero-cat h1 {
            font-size: 36px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
            display: flex;
            flex-direction: column;
        }
        .hero-cat h1 .hero-kicker {
            font-size: 20px;
            color: var(--primary);
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }
        .hero-cat h1 .hero-kicker svg {
            width: 24px;
            height: 24px;
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            margin: 16px 0 28px;
            line-height: 1.9;
            max-width: 560px;
        }
        .hero-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: 12.5px;
            color: var(--text-secondary);
            margin-bottom: 26px;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .hero-meta svg {
            width: 15px;
            height: 15px;
            color: var(--accent);
        }
        .hero-ctas {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-media {
            border-radius: 18px;
            overflow: hidden;
            box-shadow: 0 24px 60px rgba(15, 45, 85, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.8);
            position: relative;
            top: 0;
            transition: transform .4s;
        }
        .hero-media:hover {
            transform: translateY(-6px);
        }
        .hero-media img {
            aspect-ratio: 4/3;
            width: 100%;
            object-fit: cover;
        }
        .hero-media__stat {
            position: absolute;
            right: 16px;
            bottom: 16px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 12px;
            padding: 8px 18px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            border: 1px solid rgba(255,255,255,0.8);
            box-shadow: 0 8px 24px rgba(0,0,0,0.12);
        }

        /* Platform note */
        .platform-banner {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 18px 0;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .platform-banner .container {
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .platform-banner svg {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            margin-top: 2px;
            color: var(--accent);
        }
        .platform-banner strong {
            color: var(--text);
            font-weight: 600;
        }

        /* Feature grid — varied asymmetric layout */
        .feature-zone {
            display: grid;
            grid-template-columns: 5fr 3fr 4fr;
            grid-template-areas:
                "f1 f1 f2"
                "f3 f4 f4";
            gap: 20px;
        }
        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 26px;
            transition: transform .3s, box-shadow .3s;
            border: 1px solid rgba(220, 231, 241, 0.5);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .feature-card.f1 {
            grid-area: f1;
            background: linear-gradient(135deg, #ffffff 0%, #edf4fc 100%);
            border-left: 5px solid var(--primary);
        }
        .feature-card.f2 {
            grid-area: f2;
        }
        .feature-card.f3 {
            grid-area: f3;
        }
        .feature-card.f4 {
            grid-area: f4;
        }
        .feat-icon {
            width: 52px;
            height: 52px;
            border-radius: 13px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 18px;
            color: var(--primary);
        }
        .feat-icon.green {
            background: rgba(15, 163, 163, 0.1);
            color: var(--accent);
        }
        .feat-icon.gold {
            background: rgba(240, 179, 75, 0.14);
            color: #b37e14;
        }
        .feat-icon svg {
            width: 25px;
            height: 25px;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 11px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.85;
        }
        .feature-card .feature-stats {
            display: flex;
            gap: 24px;
            margin-top: 18px;
            flex-wrap: wrap;
        }
        .feature-card .feature-stats .stat-item {
            flex: 1;
            min-width: 80px;
        }
        .stat-num {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
        }
        .stat-label {
            font-size: 12.5px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* Scene cards grid — sub-channel magnetic */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .scene-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform .3s, box-shadow .3s;
        }
        .scene-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .scene-img {
            aspect-ratio: 16/10;
            background: var(--primary-light);
            overflow: hidden;
        }
        .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }
        .scene-card:hover .scene-img img {
            transform: scale(1.05);
        }
        .scene-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .scene-body .scene-tag {
            align-self: flex-start;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            padding: 3px 12px;
            border-radius: var(--radius-sm);
            margin-bottom: 10px;
            font-weight: 600;
        }
        .scene-body h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }
        .scene-body p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 14px;
            flex: 1;
        }
        .scene-link {
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .scene-link svg {
            width: 14px;
            height: 14px;
        }

        /* Scenario & process — table + rows */
        .solution-panel {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .solution-head {
            display: flex;
            align-items: space-between;
            padding: 22px 28px;
            border-bottom: 1px solid var(--border);
            background: var(--primary-light);
            gap: 18px;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        .solution-head .solution-title {
            font-weight: 700;
            font-size: 19px;
        }
        .solution-head .solution-note {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .solution-row {
            display: grid;
            grid-template-columns: 1fr 2fr 2.2fr;
            gap: 16px;
            padding: 18px 28px;
            border-bottom: 1px solid #edf2f9;
            align-items: center;
            transition: background 0.2s;
        }
        .solution-row:last-child {
            border-bottom: none;
        }
        .solution-row:hover {
            background: #fbfdff;
        }
        .solution-name {
            font-weight: 600;
            color: var(--text);
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .solution-name .no {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .solution-cond {
            color: var(--text-secondary);
            font-size: 13.5px;
        }
        .solution-action {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .pill {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
            background: #f1f5f9;
            color: var(--text-secondary);
        }
        .pill.blue {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .pill.green {
            background: rgba(15, 163, 163, .12);
            color: #0b7d6b;
        }

        /* CTA Banner */
        .cta-banner {
            background: #fff;
            border-radius: 24px;
            border: 1px solid var(--border);
            box-shadow: 0 8px 30px rgba(15,45,85,0.06);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 56px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(255,255,255,0.93);
            z-index: 1;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            max-width: 620px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 28px;
            margin-bottom: 10px;
        }
        .cta-inner p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 15px;
        }

        /* Comparison table */
        .compare-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            background: #fff;
        }
        .compare-table {
            width: 100%;
            min-width: 720px;
            border-collapse: separate;
            border-spacing: 0;
            font-size: 14px;
        }
        .compare-table th {
            background: var(--primary-light);
            padding: 16px 20px;
            text-align: left;
            color: var(--text);
            font-weight: 600;
            font-size: 14.5px;
            border-bottom: 2px solid var(--border);
        }
        .compare-table th:first-child {
            border-top-left-radius: var(--radius-lg);
        }
        .compare-table th:last-child {
            border-top-right-radius: var(--radius-lg);
        }
        .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid #edf2f9;
            color: var(--text-secondary);
            background: #fff;
            vertical-align: top;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table tr:hover td {
            background: #fbfdff;
        }
        .compare-table td:first-child {
            font-weight: 600;
            color: var(--text);
            width: 120px;
        }
        .export-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            font-size: 12px;
            background: rgba(15, 163, 163, .10);
            color: var(--accent);
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            max-width: 880px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(220, 231, 241, 0.4);
            transition: box-shadow .25s;
        }
        .faq-item.open {
            box-shadow: var(--shadow-lg);
        }
        .faq-q {
            padding: 20px 24px;
            width: 100%;
            text-align: left;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
        }
        .faq-q .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform .3s;
            font-size: 18px;
        }
        .faq-item.open .faq-q .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-a {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            color: var(--text-secondary);
            line-height: 1.85;
            font-size: 14.5px;
            border-top: 0 solid var(--border);
        }
        .faq-item.open .faq-a {
            max-height: 600px;
            padding: 0 24px 22px;
            border-top-width: 1px;
            margin-top: 0;
        }
        .faq-a .faq-inner {
            padding-top: 18px;
        }

        /* Features banner */
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
            counter-reset: step;
        }
        .flow-item {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 26px 22px;
            position: relative;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(220,231,241,.4);
            text-align: center;
        }
        .flow-item::after {
            content: "";
            position: absolute;
            right: -16px;
            top: 50%;
            width: 14px;
            height: 14px;
            border-top: 2px solid var(--primary);
            border-right: 2px solid var(--primary);
            transform: rotate(45deg) translateY(-50%);
            background: transparent;
        }
        .flow-item:last-child::after {
            display: none;
        }
        .flow-num {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 15px;
            font-weight: 700;
            margin: 0 auto 13px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flow-item h3 {
            font-size: 16px;
            margin-bottom: 6px;
        }
        .flow-item p {
            color: var(--text-secondary);
            font-size: 13px;
            line-height: 1.7;
        }

        .big-quote {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 34px 36px;
            box-shadow: var(--shadow-sm);
            border-left: 5px solid var(--primary);
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        .big-quote p {
            font-size: 16px;
            line-height: 2;
            color: var(--text-secondary);
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding-top: 52px;
            margin-top: 72px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 38px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color .2s;
        }
        .footer-col ul a:hover {
            color: var(--primary);
        }
        .footer-brand p {
            margin-top: 12px;
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 360px;
            line-height: 1.8;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12.5px;
            color: var(--text-secondary);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* Responsive */
        @media (min-width: 1440px) {
            :root {
                --container: 1320px;
            }
        }
        @media (max-width: 1024px) {
            .section {
                padding: 60px 0;
            }
            .hero-cat .container {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-cat h1 {
                font-size: 30px;
            }
            .channel-row {
                align-items: center;
                gap: 12px;
            }
            .trend-tags {
                max-width: none;
                overflow-x: auto;
                white-space: nowrap;
                padding-bottom: 4px;
            }
            .m-nav-btn {
                display: inline-flex;
            }
            .nav-list {
                display: none;
            }
            .feature-zone {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "f1"
                    "f2"
                    "f3"
                    "f4";
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 22px;
            }
            .flow-item::after {
                display: none;
            }
            .solution-row {
                grid-template-columns: 1fr;
                gap: 6px;
                padding: 20px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .cta-banner {
                padding: 40px 28px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 25px;
            }
            .section-desc {
                font-size: 15px;
            }
            .container {
                padding: 0 16px;
            }
            .brand-name {
                font-size: 17px;
            }
            .brand-row {
                height: 52px;
            }
            .brand-mark {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .channel-row {
                border-top: 1px solid transparent;
            }
            .trend-title span {
                display: none;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr;
            }
            .solution-head {
                padding: 18px 20px;
            }
            .solution-row {
                padding: 18px 20px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .hero-meta {
                flex-wrap: wrap;
                gap: 10px;
            }
            .hero-ctas .btn {
                width: 100%;
            }
            .faq-q {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-item.open .faq-a,
            .faq-a {
                padding-left: 18px;
                padding-right: 18px;
            }
            .cta-inner h2 {
                font-size: 23px;
            }
            .big-quote {
                padding: 24px;
            }
            .compare-wrap {
                border-radius: var(--radius-md);
            }
        }
        @media (max-width: 520px) {
            .hero-cat .container {
                padding-top: 36px;
                padding-bottom: 36px;
            }
            .hero-cat h1 .hero-kicker {
                font-size: 16px;
            }
            .hero-cat h1 {
                font-size: 24px;
            }
            .trend-tag {
                font-size: 11px;
                padding: 2px 10px;
            }
            .brand-tools .icon-btn:first-child {
                display: inline-flex;
            }
            .newsletter form {
                flex-direction: column;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }