/* roulang page: index */
:root {
  --bg: #0b0e13;
  --bg-deep: #080a0e;
  --bg-hero: #10141c;
  --surface: #151c26;
  --surface-raised: #1a2230;
  --line: #263040;
  --line-strong: #3e4b5f;
  --gold: #c7a871;
  --gold-bright: #dcbe84;
  --gold-deep: #b08d55;
  --blue-gray: #9aafc3;
  --headline: #e9e6de;
  --copy: #aab4c2;
  --muted: #7c8799;
  --ok: #6fa88d;
  --error: #c47a6e;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, Consolas, monospace;
  --radius: 3px;
  --radius-pill: 999px;
  --shadow: 0 10px 28px rgba(0, 0, 0, 0.18);
  --space-section: 118px;
  --container: 1200px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--copy);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
h1, h2, h3, p, figure, blockquote, dl, dd { margin: 0; }
.container { width: min(calc(100% - 40px), var(--container)); margin-inline: auto; }
:where(a, button, input, summary):focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
  border-radius: 2px;
}
::selection { background: rgba(199, 168, 113, 0.22); color: #fff; }
.no-scrollbar { scrollbar-width: none; -ms-overflow-style: none; }
.no-scrollbar::-webkit-scrollbar { display: none; }
.section { padding-block: var(--space-section); border-bottom: 1px solid var(--line); }
.section-head { display: flex; flex-direction: column; gap: 14px; margin-bottom: 54px; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.22em;
  line-height: 1;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--gold); opacity: .75; }
.section-title { font-family: var(--serif); font-weight: 600; color: var(--headline); font-size: clamp(30px, 4vw, 42px); line-height: 1.25; letter-spacing: .02em; }
.section-sub { max-width: 680px; color: var(--muted); font-size: 16px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  line-height: 1;
  font-weight: 500;
  border-radius: var(--radius-pill);
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, color .25s ease, box-shadow .25s ease, transform .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--gold); color: #14181f; }
.btn-primary:hover { background: var(--gold-bright); box-shadow: 0 6px 22px rgba(199, 168, 113, .14); color: #14181f; }
.btn-outline { background: transparent; border-color: #4b5666; color: #c7cbd4; }
.btn-outline:hover { border-color: var(--gold); color: #fff; }
.btn-text { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: #c7cbd4; }
.btn-text span { transition: transform .25s ease; }
.btn-text:hover { color: var(--gold); }
.btn-text:hover span { transform: translateX(4px); }
.btn-sm { min-height: 36px; padding: 0 16px; font-size: 14px; }
.btn-lg { min-height: 56px; padding: 0 34px; font-size: 16px; border-radius: 30px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(8, 10, 14, .94); border-bottom: 1px solid var(--line); }
.header-top { height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--headline); }
.brand-mark { width: 30px; height: 30px; color: var(--gold); flex: none; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-name { font-family: var(--serif); font-size: 22px; font-weight: 600; letter-spacing: .06em; }
.brand-name em { font-style: normal; font-size: 12px; color: var(--muted); margin-left: 4px; letter-spacing: .18em; font-family: var(--sans); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-form {
  display: flex;
  align-items: center;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: #0d1118;
  padding-left: 12px;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.search-form.open, .search-form:focus-within { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(199, 168, 113, .1); }
.search-input {
  width: 0;
  padding: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--headline);
  font-size: 14px;
  visibility: hidden;
  opacity: 0;
  transition: width .35s ease, padding .35s ease, opacity .3s ease;
}
.search-form.open .search-input { width: 190px; padding: 0 8px; visibility: visible; opacity: 1; }
.search-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 0;
  color: var(--muted);
  border-radius: 50%;
  transition: color .2s ease, background .2s ease;
}
.search-btn:hover { color: var(--gold); background: rgba(255,255,255,.05); }
.link-arrow { display: inline-flex; align-items: center; gap: 6px; }

/* Channel tabs */
.channel-wrap { border-top: 1px solid var(--line); overflow-x: auto; }
.nav-tabs { display: flex; gap: 8px; width: max-content; min-width: 100%; padding: 7px 0 11px; }
.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: #718096;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #f2efe9; }
.nav-item.active { color: #f2efe9; background: rgba(199,168,113,.1); border-color: rgba(199,168,113,.38); }
.nav-item.active::before { content: ""; width: 5px; height: 5px; background: var(--gold); border-radius: 50%; display: inline-block; flex: none; }

/* Hero */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: calc(100vh - 108px);
  padding: 96px 0 72px;
  background:
    linear-gradient(98deg, rgba(8,10,14,.94) 10%, rgba(8,10,14,.76) 55%, rgba(16,20,28,.8)),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid var(--line);
}
.hero-inner { width: 100%; }
.hero-kicker { color: var(--gold); font-size: 13px; letter-spacing: .2em; margin-bottom: 24px; display: flex; align-items: center; gap: 10px; }
.hero-kicker::after { content: ""; height: 1px; width: 64px; background: var(--gold); opacity: .5; }
.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--headline);
  font-size: clamp(38px, 6.3vw, 72px);
  line-height: 1.22;
  letter-spacing: .01em;
  max-width: 12em;
}
.hero-lead { max-width: 34em; margin-top: 28px; font-size: 17px; line-height: 1.9; color: #c2cad4; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }
.hero-note { margin-top: 22px; color: var(--muted); font-size: 13px; }
.hero-note span { color: var(--gold); }
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 72px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 2px;
  background: rgba(12,16,22,.52);
  backdrop-filter: none;
}
.hero-metric { padding: 24px 18px; border-left: 1px solid rgba(255,255,255,.12); }
.hero-metric:first-child { border-left: 0; }
.hero-metric strong { display: block; font-family: var(--serif); color: #e9e6de; font-size: 28px; font-weight: 500; letter-spacing: .02em; }
.hero-metric span { display: block; margin-top: 6px; color: #8c9aac; font-size: 12px; letter-spacing: .08em; }
.scroll-indicator { margin-top: 46px; width: 52px; height: 1px; background: rgba(199,168,113,.5); position: relative; overflow: hidden; }
.scroll-indicator::after { content: ""; position: absolute; inset: 0; background: var(--gold); transform: translateX(-100%); animation: scrollHint 2.4s ease infinite; }
@keyframes scrollHint {
  0% { transform: translateX(-100%); }
  60% { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

/* Brand / About */
.about { background: var(--bg); }
.about-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 72px;
  align-items: start;
}
.about-pull {
  font-family: var(--serif);
  font-size: clamp(28px, 3.4vw, 44px);
  color: var(--headline);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: .01em;
  border-left: 2px solid var(--gold);
  padding-left: 28px;
}
.about-pull strong { color: var(--gold); font-weight: 500; }
.about-copy { display: flex; flex-direction: column; gap: 18px; }
.about-copy p { font-size: 15px; line-height: 1.95; color: var(--copy); }
.about-copy p strong { color: #dfe0dd; font-weight: 600; }
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; margin-top: 28px; padding-top: 30px; border-top: 1px solid var(--line); }
.about-stat { display: flex; flex-direction: column; }
.about-stat strong { font-family: var(--serif); color: #e9e6de; font-size: 30px; font-weight: 500; }
.about-stat span { margin-top: 4px; color: var(--muted); font-size: 13px; }
.vertical-note { position: absolute; left: 0; top: 28px; writing-mode: vertical-rl; text-orientation: upright; letter-spacing: .24em; font-size: 12px; color: rgba(199,168,113,.45); }

/* Section cards, category entries */
.channel-grid { display: grid; grid-template-columns: 1.2fr .9fr 1.1fr; gap: 24px; align-items: start; }
.channel-card { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: 2px; overflow: hidden; min-height: 300px; display: flex; flex-direction: column; transition: border-color .3s ease, background .3s ease, transform .3s ease; }
.channel-card:hover { background: var(--surface-raised); border-color: rgba(199,168,113,.32); transform: translateY(-4px); }
.channel-media { height: 176px; overflow: hidden; background: var(--bg-deep); position: relative; }
.channel-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s ease; }
.channel-card:hover .channel-media img { transform: scale(1.03); }
.channel-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8,10,14,0) 35%, rgba(8,10,14,.5)); }
.channel-num { position: absolute; top: 14px; left: 16px; z-index: 2; color: rgba(255,255,255,.72); font-family: var(--mono); font-size: 12px; letter-spacing: .18em; }
.channel-body { padding: 24px 24px 28px; display: flex; flex-direction: column; flex: 1; }
.channel-body h3 { font-family: var(--serif); color: #e9e6de; font-size: 23px; font-weight: 600; letter-spacing: .02em; }
.channel-body p { margin-top: 10px; color: var(--muted); font-size: 14px; line-height: 1.85; }
.channel-link { margin-top: auto; padding-top: 20px; }

/* Featured static content */
.featured-grid { display: grid; grid-template-columns: minmax(0, 1.9fr) minmax(0, 1fr); gap: 24px; }
.cover-card { position: relative; display: flex; align-items: flex-end; overflow: hidden; border: 1px solid var(--line); border-radius: 2px; background: #0d1118; }
.cover-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .82; transition: transform 1.3s ease; }
.cover-card:hover img { transform: scale(1.03); }
.cover-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(185deg, rgba(10,13,18,.18) 0%, rgba(10,13,18,.86) 92%); }
.cover-card .cover-main-card { }
.feature-main { grid-row: span 2; aspect-ratio: 16 / 7.1; width: 100%; min-height: 340px; }
.feature-side { aspect-ratio: 4 / 5; width: 100%; min-height: 300px; }
.cover-info { position: relative; z-index: 2; padding: 28px 30px; max-width: 640px; }
.cover-info h3 { font-family: var(--serif); color: #f1eeea; font-size: 26px; font-weight: 600; line-height: 1.35; margin-top: 14px; letter-spacing: .02em; }
.cover-info p { color: #c1cad0; font-size: 14px; line-height: 1.85; margin-top: 12px; }
.cover-meta { display: flex; align-items: center; gap: 16px; margin-top: 18px; color: var(--muted); font-size: 12px; letter-spacing: .05em; }
.cover-side .cover-info { padding: 24px 22px; }
.cover-side .cover-info h3 { font-size: 21px; }
.cover-side .cover-info p { font-size: 13px; }
.cover-side .badge { margin-bottom: 14px; }
.feature-note { position: relative; z-index: 4; margin-top: -26px; margin-right: 12px; margin-left: 12px; background: var(--surface-raised); border: 1px solid rgba(199,168,113,.45); padding: 22px 26px; border-radius: 2px; box-shadow: var(--shadow); }
.feature-note p { font-family: var(--serif); color: #e3e0da; font-size: 17px; line-height: 1.7; }
.feature-note strong { color: var(--gold); font-weight: 500; }
.feature-note small { display: block; margin-top: 12px; color: var(--muted); font-size: 12px; letter-spacing: .1em; }

/* Badge */
.badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(199,168,113,.12); color: var(--gold-bright); border: 1px solid rgba(199,168,113,.28); padding: 4px 12px; border-radius: var(--radius-pill); font-size: 12px; letter-spacing: .08em; line-height: 1.4; }

/* Latest List */
.latest { background: var(--bg); }
.news-list { display: flex; flex-direction: column; border-top: 1px solid var(--line); margin-top: 42px; }
.news-row {
  display: grid;
  grid-template-columns: 128px minmax(0, 1fr) 150px;
  gap: 26px;
  align-items: center;
  padding: 22px 8px;
  border-bottom: 1px solid var(--line);
  border-radius: 2px;
  transition: background .25s ease, border-color .25s ease;
}
.news-row:hover { background: rgba(255,255,255,.018); border-color: var(--line-strong); }
.news-tag { width: max-content; color: var(--gold); border: 1px solid rgba(199,168,113,.35); font-size: 12px; letter-spacing: .1em; padding: 4px 12px; border-radius: 999px; }
.news-body { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.news-title { color: #e4e1db; font-size: 18px; font-weight: 600; line-height: 1.5; transition: color .2s; }
.news-row:hover .news-title { color: var(--gold-bright); }
.news-excerpt { color: var(--muted); font-size: 13px; line-height: 1.75; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.news-date { color: var(--muted); font-size: 12px; text-align: right; letter-spacing: .06em; font-family: var(--mono); }
.empty-state { border: 1px dashed var(--line-strong); border-radius: 2px; padding: 68px 24px; display: flex; flex-direction: column; align-items: center; gap: 18px; color: var(--muted); background: rgba(255,255,255,.012); }
.empty-state::before { content: ""; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-strong); position: relative; }
.empty-state::after { content: "✦"; position: absolute; color: var(--gold); font-size: 20px; transform: translateY(-12px); }
.empty-state p { font-size: 15px; }
.latest-more { display: flex; justify-content: flex-end; margin-top: 32px; }

/* Insight section / dark band */
.insight {
  background:
    linear-gradient(120deg, rgba(8,10,14,.92) 12%, rgba(10,13,18,.72) 70%, rgba(13,17,24,.82)),
    url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  border: 0;
}
.insight-grid { display: grid; grid-template-columns: 1fr .92fr; gap: 56px; align-items: center; }
.insight h2 { max-width: 11em; }
.insight-lead p { margin-top: 18px; color: var(--copy); font-size: 15px; max-width: 500px; }
.insight-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px 40px; }
.insight-stat { border-top: 1px solid rgba(199,168,113,.26); padding-top: 16px; }
.insight-stat strong { display: block; font-family: var(--serif); color: #e9e6de; font-size: 34px; font-weight: 500; letter-spacing: .02em; }
.insight-stat strong i { color: var(--gold); font-style: normal; font-size: 20px; margin-right: 2px; }
.insight-stat span { color: var(--muted); font-size: 13px; letter-spacing: .04em; margin-top: 8px; display: block; }

/* Trust */
.trust { background: var(--bg); }
.trust-quote { max-width: 860px; }
.trust-quote blockquote { position: relative; font-family: var(--serif); color: #e3e0da; font-size: clamp(22px, 2.4vw, 30px); line-height: 1.7; font-weight: 500; padding: 20px 0 24px 38px; border-left: 2px solid var(--gold); }
.trust-quote blockquote::before { content: "“"; position: absolute; top: -20px; left: -8px; font-size: 80px; color: rgba(199,168,113,.25); font-family: var(--serif); line-height: 1; }
.trust-quote figcaption { display: flex; align-items: center; gap: 12px; margin-top: 16px; color: var(--muted); font-size: 14px; }
.trust-quote figcaption strong { color: #d2d1cd; font-weight: 600; }
.trust-logo-strip { margin-top: 74px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 26px 0; overflow: hidden; }
.trust-logo-track { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px 48px; color: #667589; font-family: var(--serif); font-size: 18px; letter-spacing: .04em; transition: color .2s; }
.trust-logo-track span { opacity: .78; }
.trust-logo-track span:hover { color: var(--gold); opacity: 1; }
.trust-note { margin-top: 30px; color: var(--muted); font-size: 12px; text-align: center; letter-spacing: .1em; }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  background: transparent;
  border: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  text-align: left;
  padding: 22px 0;
  color: #e4e1db;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.5;
  transition: color .2s;
}
.faq-q:hover { color: var(--gold-bright); }
.faq-icon { position: relative; width: 22px; height: 22px; flex: none; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: currentColor; transition: transform .25s ease; }
.faq-icon::before { top: 10px; left: 1px; width: 20px; height: 1px; }
.faq-icon::after { top: 1px; left: 10px; width: 1px; height: 20px; }
.faq-item.active .faq-icon::after { transform: rotate(90deg); opacity: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-a-inner { padding: 0 0 24px; color: var(--muted); font-size: 15px; line-height: 1.9; max-width: 760px; }
.faq-help { background: var(--surface); border: 1px solid var(--line); padding: 24px; border-radius: 2px; display: flex; flex-direction: column; align-items: flex-start; }
.faq-help h3 { font-family: var(--serif); font-size: 22px; color: var(--headline); font-weight: 600; margin-bottom: 12px; }
.faq-help p { color: var(--muted); font-size: 14px; line-height: 1.8; margin-bottom: 20px; }
.faq-help .btn { margin-top: 2px; }

/* Subscribe / CTA */
.cta-block { background: var(--bg); }
.cta-card { background: var(--surface); border: 1px solid var(--line); border-radius: 3px; padding: 58px 56px; display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; position: relative; overflow: hidden; }
.cta-card::before { content: "✦"; position: absolute; right: 0; top: -34px; color: rgba(199,168,113,.13); font-size: 200px; line-height: 1; pointer-events: none; transform: rotate(10deg); }
.cta-left h2 { font-family: var(--serif); font-size: clamp(28px, 3vw, 38px); color: #f0ede7; font-weight: 600; line-height: 1.35; }
.cta-left p { margin-top: 16px; color: var(--muted); font-size: 15px; line-height: 1.9; max-width: 510px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; position: relative; z-index: 2; }
.subscribe-wrap { background: #0d1118; border: 1px solid var(--line); border-radius: 3px; padding: 24px; display: flex; flex-direction: column; gap: 14px; position: relative; z-index: 2; }
.subscribe-wrap label { color: var(--muted); font-size: 13px; letter-spacing: .06em; }
.subscribe-row { display: flex; gap: 8px; flex-wrap: nowrap; }
.subscribe-input {
  flex: 1;
  min-width: 0;
  height: 46px;
  background: var(--bg-deep);
  border: 1px solid #394455;
  color: var(--headline);
  font-size: 14px;
  padding: 0 16px;
  border-radius: 2px;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.subscribe-input:focus { outline: 0; border-color: var(--gold); box-shadow: 0 0 0 3px rgba(199,168,113,.1); }
.form-msg { font-size: 13px; min-height: 18px; transition: color .2s; }
.form-msg.error { color: var(--error); }
.form-msg.success { color: var(--ok); }
.subscribe-tip { color: #5e6b7b; font-size: 12px; }

/* Footer */
.footer { background: var(--bg-deep); border-top: 1px solid var(--line); padding: 72px 0 34px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 42px; }
.footer-brand .brand-name { font-size: 24px; }
.footer-brand p { margin-top: 20px; color: var(--muted); font-size: 14px; line-height: 1.9; max-width: 280px; }
.footer-col h4 { color: #dfe0dd; font-size: 14px; font-weight: 600; letter-spacing: .14em; margin-bottom: 18px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 12px; }
.footer-col a { color: var(--muted); font-size: 14px; transition: color .2s; }
.footer-col a:hover { color: var(--gold); }
.footer-contact { color: var(--muted); font-size: 14px; display: flex; flex-direction: column; gap: 12px; }
.footer-contact a { color: var(--copy); }
.footer-contact strong { color: #dfe0dd; font-weight: 600; }
.footer-bottom { margin-top: 64px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; color: #5e6b7b; font-size: 13px; flex-wrap: wrap; gap: 10px; }

/* Responsive */
@media (max-width: 1080px) {
  .hero-metrics { grid-template-columns: repeat(2, 1fr); row-gap: 0; }
  .hero-metric:nth-child(2) { border-left: 0; }
  .channel-grid { grid-template-columns: 1fr 1fr; }
  .faq-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-card { padding: 40px 34px; grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .featured-grid { grid-template-columns: 1fr; }
  .feature-main { grid-row: auto; aspect-ratio: 16 / 8; }
  .feature-side { aspect-ratio: 4 / 3.2; }
  .insight-grid { grid-template-columns: 1fr; }
  .vertical-note { display: none; }
}
@media (max-width: 768px) {
  :root { --space-section: 82px; }
  .header-top { height: 58px; }
  .header-brand-cta { display: none; }
  .hero { padding: 86px 0 54px; }
  .hero-metrics { grid-template-columns: repeat(2, 1fr); }
  .hero-metric { padding: 18px 14px; }
  .channel-grid { grid-template-columns: 1fr; }
  .news-row { grid-template-columns: 1fr; gap: 12px; padding: 22px 4px; }
  .news-tag { width: auto; }
  .news-date { text-align: left; }
  .latest-more { justify-content: flex-start; }
  .cta-actions .btn { flex: 1; min-width: 0; }
  .scroll-indicator { display: none; }
  .feature-note { margin-left: 0; }
}
@media (max-width: 520px) {
  .container { width: min(calc(100% - 30px), var(--container)); }
  .header-top { gap: 8px; }
  .header-actions { gap: 8px; }
  .brand-name { font-size: 19px; }
  .hero { padding: 68px 0 46px; }
  .hero h1 { font-size: 35px; line-height: 1.3; }
  .hero-lead { font-size: 15px; }
  .hero-actions .btn { flex: 1; justify-content: center; }
  .hero-metrics { grid-template-columns: 1fr 1fr; }
  .hero-metric:nth-child(2) { border-left: 0; }
  .hero-metric:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.08); }
  .hero-metric span { letter-spacing: .02em; }
  .section-sub { font-size: 14px; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .cover-info { padding: 20px 18px; }
  .cover-info h3 { font-size: 21px; }
  .faq-icon { width: 18px; }
  .cta-card { padding: 32px 20px; }
  .subscribe-row { flex-wrap: wrap; }
  .subscribe-row .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* roulang page: article */
:root{
  --bg:#0B0E13;
  --bg-soft:#10141C;
  --panel:#151C26;
  --panel-hover:#1A2230;
  --dark:#080A0E;
  --line:#263040;
  --line-strong:#3E4B5F;
  --gold:#C7A871;
  --gold-light:#DCBE84;
  --gold-dim:rgba(199,168,113,.18);
  --sky:#9AAFC3;
  --text:#E9E6DE;
  --body:#AAB4C2;
  --muted:#7C8799;
  --font-serif:"Songti SC","Noto Serif SC","Source Han Serif SC",serif;
  --font-sans:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;
  --radius:4px;
  --radius-pill:999px;
  --shadow-card:0 12px 30px rgba(0,0,0,.16);
  --space:8px;
  --container:1200px;
  --read-width:760px;
  --ease:cubic-bezier(.4,0,.2,1);
}

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

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

body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

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

a{
  color:inherit;
  text-decoration:none;
}

input,button,textarea{
  font-family:inherit;
  font-size:inherit;
}

h1,h2,h3,h4{
  margin:0;
  font-weight:600;
  color:var(--text);
}

ul,ol{
  margin:0;
  padding:0;
}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(11,14,19,.97);
  border-bottom:1px solid var(--line);
}

.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:60px;
  gap:16px;
}

.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-weight:600;
  letter-spacing:.02em;
  flex-shrink:0;
}

.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  color:var(--gold);
  border:1px solid rgba(199,168,113,.35);
  border-radius:50%;
  background:rgba(199,168,113,.04);
}

.brand-mark svg{
  width:24px;
  height:24px;
}

.brand-name{
  font-size:20px;
  font-family:var(--font-serif);
  letter-spacing:.05em;
}

.brand-name em{
  font-style:normal;
  color:var(--gold);
  font-size:13px;
  margin-left:8px;
  letter-spacing:.18em;
}

.header-actions{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:14px;
}

.search-form{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:6px;
}

.search-input{
  width:0;
  height:36px;
  padding:0;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  background:#0D1118;
  color:var(--text);
  font-size:13px;
  opacity:0;
  transition:width .28s var(--ease),opacity .2s,border-color .2s,background .2s;
}

.search-input::placeholder{
  color:var(--muted);
}

.search-form.is-open .search-input{
  width:190px;
  padding:0 14px;
  border-color:var(--line-strong);
  opacity:1;
}

.search-input:focus{
  outline:none;
  border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(199,168,113,.12);
}

.search-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:32px;
  height:32px;
  border-radius:50%;
  background:transparent;
  border:1px solid var(--line-strong);
  color:var(--body);
  cursor:pointer;
  transition:border-color .2s,color .2s,background .2s;
}

.search-btn:hover{
  color:var(--gold);
  border-color:var(--gold);
}

.channel-wrap{
  overflow-x:auto;
  border-top:1px solid rgba(38,48,64,.75);
  padding:7px 0;
}

.no-scrollbar{
  scrollbar-width:none;
  -ms-overflow-style:none;
}

.no-scrollbar::-webkit-scrollbar{
  display:none;
}

.nav-tabs{
  display:flex;
  align-items:center;
  gap:6px;
  white-space:nowrap;
  min-width:max-content;
}

.nav-item{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:34px;
  padding:0 16px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  background:transparent;
  color:#718096;
  font-size:14px;
  letter-spacing:.03em;
  transition:color .2s,background .2s,border-color .2s;
}

.nav-item:hover{
  color:var(--text);
  background:rgba(255,255,255,.06);
}

.nav-item.active{
  color:#F2EFE9;
  border-color:rgba(199,168,113,.6);
  background:rgba(199,168,113,.08);
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 24px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.02em;
  transition:background .2s,border-color .2s,color .2s,transform .2s,box-shadow .2s;
  cursor:pointer;
}

.btn-primary{
  background:var(--gold);
  color:#14181F;
}

.btn-primary:hover{
  background:var(--gold-light);
  box-shadow:0 6px 14px rgba(199,168,113,.16);
  transform:translateY(-1px);
}

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

.btn-sm{
  height:32px;
  padding:0 16px;
  font-size:13px;
  border-radius:var(--radius-pill);
}

.header-brand-cta{
  display:inline-flex;
}

.article-page .site-main{
  min-height:60vh;
}

.article-hero{
  position:relative;
  padding:82px 0 72px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(108deg,rgba(11,14,19,.98) 20%,rgba(16,20,28,.86) 62%,rgba(11,14,19,.88)),url('/assets/images/backpic/back-2.webp');
  background-position:center 35%,center 45%;
  background-size:cover,cover;
}

.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  letter-spacing:.06em;
  color:var(--muted);
}

.breadcrumb a{
  color:var(--body);
  transition:color .2s;
}

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

.breadcrumb .divider{
  color:#566378;
}

.article-title{
  max-width:900px;
  margin:30px 0 22px;
  font-family:var(--font-serif);
  font-size:clamp(36px,4.6vw,56px);
  line-height:1.25;
  letter-spacing:.01em;
  color:var(--text);
  text-wrap:balance;
}

.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:10px;
  font-size:14px;
  color:var(--muted);
  letter-spacing:.03em;
}

.article-meta .meta-label{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--gold);
  font-size:13px;
}

.article-meta .dot{
  color:#4A5568;
}

.article-wrap{
  padding:64px 0 72px;
}

.article-content{
  max-width:var(--read-width);
  margin:0 auto;
}

.article-content > *{
  margin-top:0;
  margin-bottom:1.5rem;
}

.article-content p{
  font-size:17px;
  line-height:1.95;
  color:var(--body);
}

.article-content > p:first-of-type::first-letter{
  font-family:var(--font-serif);
  font-size:1.65em;
  font-weight:600;
  color:var(--text);
  float:left;
  line-height:1;
  margin-right:6px;
}

.article-content h2{
  font-size:28px;
  line-height:1.4;
  margin-top:52px;
  margin-bottom:18px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(38,48,64,.72);
  font-family:var(--font-serif);
  font-weight:600;
}

.article-content h3{
  font-size:22px;
  line-height:1.5;
  margin-top:38px;
  margin-bottom:12px;
  color:#F2EFE9;
}

.article-content h4{
  font-size:18px;
  margin-top:32px;
  margin-bottom:10px;
  color:#E2DFD6;
}

.article-content ul,
.article-content ol{
  padding-left:22px;
  margin-bottom:24px;
  line-height:1.9;
  color:var(--body);
}

.article-content li{
  margin-bottom:8px;
}

.article-content a{
  color:var(--sky);
  border-bottom:1px solid rgba(154,175,195,.34);
  transition:border-color .2s,color .2s;
}

.article-content a:hover{
  color:var(--gold-light);
  border-bottom-color:var(--gold);
}

.article-content blockquote{
  margin:36px 0;
  padding:8px 24px 8px 28px;
  border-left:2px solid var(--gold);
  background:rgba(199,168,113,.045);
  color:#C6CEDD;
  font-family:var(--font-serif);
  font-size:19px;
  line-height:1.8;
}

.article-content blockquote p{
  margin-bottom:0;
  font-size:19px;
}

.article-content img{
  margin:32px auto;
  border-radius:2px;
  border:1px solid var(--line);
}

.article-content figure{
  margin:36px 0;
}

.article-content figure img{
  margin-bottom:10px;
}

.article-content figcaption{
  font-size:12px;
  color:var(--muted);
  text-align:center;
  letter-spacing:.04em;
}

.article-content hr{
  border:0;
  border-top:1px solid var(--line);
  margin:48px 0;
}

.article-content table{
  width:100%;
  border-collapse:collapse;
  font-size:14px;
  margin-bottom:32px;
}

.article-content th{
  background:var(--panel);
  color:var(--text);
  text-align:left;
  padding:10px 14px;
  border:1px solid var(--line);
}

.article-content td{
  padding:10px 14px;
  border:1px solid var(--line);
  color:var(--body);
}

.article-content iframe,
.article-content video{
  max-width:100%;
  border-radius:2px;
}

.article-foot{
  max-width:var(--read-width);
  margin:0 auto;
  padding:28px 0 0;
  border-top:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}

.article-foot .foot-note{
  font-size:13px;
  color:var(--muted);
}

.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--body);
  font-size:14px;
  font-weight:600;
  letter-spacing:.02em;
  transition:color .2s,gap .2s;
}

.text-link svg{
  transition:transform .2s;
}

.text-link:hover{
  color:var(--gold);
}

.text-link:hover svg{
  transform:translateX(4px);
}

.related-section{
  padding:84px 0 92px;
  background:var(--bg-soft);
  border-top:1px solid var(--line);
}

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:20px;
  margin-bottom:40px;
}

.eyebrow{
  display:block;
  font-size:12px;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--gold);
  margin-bottom:8px;
}

.section-head h2{
  font-family:var(--font-serif);
  font-size:30px;
  line-height:1.35;
  font-weight:600;
}

.section-head p{
  max-width:380px;
  margin:0;
  font-size:14px;
  color:var(--muted);
}

.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}

.rel-card{
  display:flex;
  flex-direction:column;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  transition:border-color .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease),background .3s;
}

.rel-card:hover{
  transform:translateY(-4px);
  border-color:rgba(199,168,113,.45);
  background:var(--panel-hover);
  box-shadow:var(--shadow-card);
}

.rel-media{
  position:relative;
  aspect-ratio:16/10;
  overflow:hidden;
  background:var(--dark);
}

.rel-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .7s var(--ease),opacity .3s;
  opacity:.92;
}

.rel-card:hover .rel-media img{
  transform:scale(1.035);
  opacity:1;
}

.rel-tag{
  position:absolute;
  left:12px;
  top:12px;
  display:inline-block;
  padding:4px 10px;
  background:rgba(11,14,19,.78);
  border:1px solid rgba(199,168,113,.5);
  color:#F2EFE9;
  font-size:12px;
  letter-spacing:.05em;
  border-radius:var(--radius-pill);
  backdrop-filter:none;
}

.rel-body{
  display:flex;
  flex-direction:column;
  flex:1;
  padding:20px 20px 22px;
}

.rel-body h3{
  font-size:18px;
  line-height:1.55;
  margin-bottom:8px;
  font-family:var(--font-serif);
  font-weight:600;
  color:var(--text);
  transition:color .2s;
}

.rel-card:hover .rel-body h3{
  color:var(--gold-light);
}

.rel-body p{
  margin:0 0 16px;
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

.rel-more{
  margin-top:auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--sky);
  font-weight:600;
  transition:color .2s;
}

.rel-more svg{
  transition:transform .2s;
}

.rel-card:hover .rel-more{
  color:var(--gold);
}

.rel-card:hover .rel-more svg{
  transform:translateX(4px);
}

.missing-section{
  padding:100px 0;
  max-width:680px;
  margin:0 auto;
}

.missing-box{
  text-align:center;
  border:1px dashed var(--line-strong);
  border-radius:var(--radius);
  background:var(--panel);
  padding:70px 40px 74px;
}

.missing-box h1{
  font-family:var(--font-serif);
  font-size:44px;
  margin-bottom:18px;
}

.missing-box p{
  color:var(--muted);
  max-width:420px;
  margin:0 auto 28px;
  font-size:15px;
}

.footer{
  background:var(--dark);
  border-top:1px solid var(--line);
  padding-top:64px;
}

.footer-grid{
  display:grid;
  grid-template-columns:2.2fr 1.2fr 1.2fr 1.5fr;
  gap:44px;
  padding-bottom:54px;
}

.footer-brand .brand{
  margin-bottom:18px;
}

.footer-brand p{
  margin:0;
  max-width:360px;
  font-size:14px;
  line-height:1.85;
  color:var(--muted);
}

.footer-col h4,
.footer-contact strong{
  font-size:15px;
  color:var(--text);
  margin-bottom:18px;
  font-weight:600;
  letter-spacing:.03em;
  display:block;
}

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

.footer-col a{
  color:var(--body);
  font-size:14px;
  transition:color .2s;
}

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

.footer-contact{
  display:flex;
  flex-direction:column;
  gap:20px;
  font-size:14px;
  color:var(--muted);
  line-height:1.8;
}

.footer-contact a{
  color:var(--body);
  transition:color .2s;
}

.footer-contact a:hover{
  color:var(--gold);
}

.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  padding:18px 0;
  border-top:1px solid rgba(38,48,64,.66);
  font-size:12px;
  color:#5D6B7D;
}

.footer-bottom a{
  color:#7C8799;
}

a:focus-visible,
button:focus-visible,
input:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  border-radius:2px;
}

::selection{
  background:rgba(199,168,113,.22);
  color:var(--text);
}

@media (max-width:1020px){
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:36px;
  }
  .related-grid{
    grid-template-columns:repeat(2,1fr);
  }
}

@media (max-width:820px){
  .article-title{
    margin-top:22px;
  }
  .article-hero{
    padding:58px 0 54px;
  }
  .article-wrap{
    padding:44px 0 52px;
  }
  .search-form.is-open .search-input{
    width:130px;
  }
}

@media (max-width:640px){
  .container{
    padding-left:18px;
    padding-right:18px;
  }
  .header-brand-cta,
  .header-actions .btn-sm{
    display:none;
  }
  .related-grid{
    grid-template-columns:1fr;
  }
  .article-content{
    font-size:16px;
  }
  .article-content p{
    font-size:16px;
  }
  .article-content blockquote{
    font-size:17px;
  }
  .article-content h2{
    font-size:24px;
  }
  .article-content h3{
    font-size:20px;
  }
  .article-title{
    font-size:32px;
    line-height:1.28;
  }
  .section-head{
    flex-direction:column;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
    padding-bottom:38px;
  }
  .footer-bottom{
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:6px;
  }
  .article-foot{
    align-items:flex-start;
  }
  .rel-media{
    aspect-ratio:16/9;
  }
}

@media (max-width:480px){
  .brand-name{
    font-size:18px;
  }
  .brand-mark{
    width:30px;
    height:30px;
  }
  .search-form.is-open .search-input{
    width:100px;
    font-size:12px;
  }
  .nav-item{
    padding:0 12px;
    font-size:13px;
  }
  .article-content img{
    margin:24px auto;
  }
  .missing-box{
    padding:50px 22px;
  }
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms!important;
    animation-iteration-count:1!important;
    transition-duration:.001ms!important;
    scroll-behavior:auto!important;
  }
}

/* roulang page: category1 */
:root{
  --bg:#0B0E13;
  --bg-soft:#10141C;
  --bg-deep:#080A0E;
  --panel:#151C26;
  --panel-hover:#1A2230;
  --border:#263040;
  --border-strong:#3E4B5F;
  --gold:#C7A871;
  --gold-bright:#DCBE84;
  --moon:#9AAFC3;
  --body:#AAB4C2;
  --text:#E9E6DE;
  --muted:#7C8799;
  --success:#6FA88D;
  --warning:#C69B6F;
  --error:#C47A6E;
  --radius-s:2px;
  --radius-m:4px;
  --radius-pill:999px;
  --font-serif:"Songti SC","Noto Serif SC","Source Han Serif SC",serif;
  --font-sans:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  --shadow:0 12px 30px rgba(0,0,0,.16);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--body);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color-scheme:dark;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,p,figure,ul{margin:0;}
ul{padding:0;list-style:none;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
button,input{font:inherit;}
button{cursor:pointer;}
.container{
  max-width:1200px;
  margin-inline:auto;
  width:calc(100% - 48px);
}
:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:3px;
  border-radius:var(--radius-m);
}

/* 按钮体系 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  border-radius:var(--radius-pill);
  border:1px solid transparent;
  padding:14px 26px;
  font-size:15px;
  font-weight:500;
  line-height:1;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .1s ease;
}
.btn-lg{padding:17px 32px;font-size:16px;}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:var(--gold);
  color:#14181F;
  font-weight:600;
}
.btn-primary:hover{background:var(--gold-bright);}
.btn-primary:active,.btn-ghost:active{transform:translateY(1px);}
.btn-ghost{
  border-color:#4B5666;
  background:transparent;
  color:#C7CBD4;
}
.btn-ghost:hover{border-color:var(--gold);color:#fff;}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--gold);
  font-size:14px;
  line-height:1.2;
  transition:gap .2s ease;
}
.text-link::after{content:"→";transition:transform .2s ease;}
.text-link:hover{color:var(--gold-bright);}
.text-link:hover::after{transform:translateX(4px);}

/* 导航 */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,14,19,.98);
  border-bottom:1px solid var(--border);
}
.header-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  min-height:64px;
  padding-top:10px;
  padding-bottom:10px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-serif);
  font-size:23px;
  color:var(--text);
  white-space:nowrap;
}
.brand-mark{
  color:var(--gold);
  width:34px;
  height:34px;
  display:inline-flex;
  flex:none;
}
.brand-mark svg{width:100%;height:100%;}
.brand-name em{
  font-style:normal;
  font-size:.72em;
  color:var(--gold);
  letter-spacing:.2em;
  margin-left:2px;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:14px;
  margin-left:auto;
}
.search-form{
  display:flex;
  align-items:center;
  border:1px solid var(--border-strong);
  background:var(--bg);
  border-radius:var(--radius-pill);
  height:40px;
  min-width:40px;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.search-form:focus-within{
  border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(199,168,113,.12);
}
.search-input{
  width:0;
  padding:0;
  border:0;
  background:transparent;
  color:var(--text);
  font-size:14px;
  opacity:0;
  transition:width .3s ease,opacity .2s ease,padding .3s ease;
}
.search-input:focus{outline:none;}
.search-input::placeholder{color:var(--muted);}
.search-btn{
  border:0;
  background:transparent;
  color:var(--body);
  width:38px;
  height:38px;
  border-radius:50%;
  display:grid;
  place-items:center;
  flex:none;
  transition:color .2s ease;
}
.search-btn:hover{color:var(--gold);}
.search-form.expanded .search-input{
  width:168px;
  padding-left:14px;
  padding-right:6px;
  opacity:1;
}
.header-brand-cta{
  flex:none;
}
.channel-wrap{
  border-top:1px solid rgba(38,48,64,.55);
  overflow-x:auto;
  overflow-y:hidden;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channel-wrap::-webkit-scrollbar{display:none;}
.nav-tabs{
  display:flex;
  gap:8px;
  width:max-content;
  padding:8px 0 10px;
}
.nav-item{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:8px 18px;
  border-radius:var(--radius-pill);
  color:var(--muted);
  font-size:15px;
  white-space:nowrap;
  transition:background-color .2s ease,color .2s ease;
}
.nav-item:hover{
  background:rgba(255,255,255,.07);
  color:var(--text);
}
.nav-item.active{
  background:rgba(199,168,113,.14);
  color:var(--text);
}
.nav-item.active::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:2px;
  width:4px;
  height:4px;
  border-radius:50%;
  background:var(--gold);
  transform:translateX(-50%);
}

/* Hero */
.hero-category{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:clamp(72px,9vw,128px) 0 clamp(56px,8vw,104px);
  background:var(--bg-soft);
}
.hero-category::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-2;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;
  background-position:center;
  opacity:.26;
  filter:saturate(.85);
}
.hero-category::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background:linear-gradient(180deg,rgba(11,14,19,.72) 0%,rgba(11,14,19,.94) 100%);
}
.hero-inner{
  display:grid;
  grid-template-columns:minmax(0,1.6fr) minmax(280px,.72fr);
  gap:64px;
  align-items:center;
}
.overline{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  color:var(--gold);
}
.overline span + span::before{
  content:"/";
  margin-right:10px;
  opacity:.5;
  color:var(--border-strong);
}
.hero-title{
  margin-top:18px;
  font-family:var(--font-serif);
  font-size:clamp(44px,7vw,76px);
  font-weight:600;
  color:var(--text);
  line-height:1.12;
  letter-spacing:.01em;
}
.hero-lead{
  max-width:34em;
  margin-top:22px;
  color:var(--body);
  font-size:17px;
  line-height:1.85;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:34px;
}
.hero-note{
  margin-top:24px;
  color:var(--muted);
  font-size:13px;
}
.hero-card{
  background:rgba(21,28,38,.85);
  border:1px solid var(--border);
  border-top:1px solid var(--gold);
  border-radius:var(--radius-m);
  padding:26px 26px 24px;
}
.hero-card h3{
  font-family:var(--font-serif);
  font-weight:600;
  font-size:20px;
  color:var(--text);
  letter-spacing:.02em;
}
.check-list{
  margin-top:20px;
  display:grid;
  gap:14px;
}
.check-list li{
  position:relative;
  padding-left:26px;
  color:var(--body);
  font-size:14px;
  line-height:1.7;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.55em;
  width:7px;
  height:7px;
  border:1px solid var(--gold);
  border-radius:50%;
}
.hero-card-tip{
  margin-top:20px;
  padding-top:18px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:13px;
  line-height:1.8;
}

/* 数据条 */
.metrics-strip{
  border-block:1px solid var(--border);
  background:rgba(16,20,28,.6);
}
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
}
.metric-item{
  padding:34px 30px 34px 4px;
  border-right:1px solid var(--border);
}
.metric-item:last-child{border-right:0;}
.metric-main{
  display:flex;
  align-items:baseline;
  gap:14px;
}
.metric-num{
  font-family:var(--font-serif);
  font-size:clamp(48px,5vw,72px);
  line-height:1;
  color:var(--gold);
}
.metric-label{
  color:var(--text);
  font-size:15px;
  letter-spacing:.04em;
}
.metric-desc{
  margin-top:12px;
  color:var(--muted);
  font-size:13px;
  line-height:1.7;
}

/* 通用区块 */
.section{
  padding:clamp(68px,8vw,104px) 0;
}
.section--alt{
  background:var(--bg-soft);
  border-block:1px solid var(--border);
}
.section-head{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) minmax(0,.9fr);
  align-items:end;
  gap:28px;
  margin-bottom:52px;
}
.section-title{
  margin-top:14px;
  font-family:var(--font-serif);
  font-weight:600;
  font-size:clamp(30px,3.6vw,44px);
  line-height:1.25;
  color:var(--text);
  letter-spacing:.01em;
}
.section-note{
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
  max-width:36em;
}

/* 路线流程 */
.roadmap{
  border-top:1px solid var(--border);
}
.road-row{
  display:grid;
  grid-template-columns:72px 120px minmax(0,1fr) 180px;
  gap:26px;
  align-items:start;
  padding:30px 0;
  border-bottom:1px solid var(--border);
}
.road-index{
  font-family:var(--font-serif);
  font-size:30px;
  line-height:1;
  color:var(--gold);
  opacity:.85;
}
.road-stage{
  padding:6px 0 0;
}
.road-stage span{
  display:inline-block;
  border:1px solid var(--border-strong);
  color:var(--moon);
  font-size:12px;
  letter-spacing:.08em;
  padding:4px 12px;
  border-radius:var(--radius-pill);
}
.road-title{
  font-family:var(--font-serif);
  font-size:20px;
  font-weight:600;
  color:var(--text);
  line-height:1.4;
}
.road-copy{
  margin-top:8px;
  color:var(--body);
  font-size:15px;
  line-height:1.8;
}
.road-result{
  border-left:1px solid var(--border);
  padding:4px 0 0 18px;
  color:var(--muted);
  font-size:13px;
  line-height:1.8;
}
.road-result strong{
  display:block;
  color:var(--gold);
  font-weight:500;
  font-size:12px;
  letter-spacing:.08em;
  margin-bottom:6px;
}

/* 目录卡 */
.google{
  display:block;
}
.directory-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
}
.dir-card{
  display:grid;
  grid-template-columns:196px minmax(0,1fr);
  background:var(--panel);
  border:1px solid var(--border);
  border-radius:var(--radius-m);
  overflow:hidden;
  transition:background-color .25s ease,border-color .25s ease,transform .25s ease;
}
.dir-card:hover{
  background:var(--panel-hover);
  border-color:rgba(199,168,113,.48);
  transform:translateY(-2px);
}
.dir-thumb{
  position:relative;
  margin:0;
  min-height:250px;
  overflow:hidden;
  background:var(--bg-deep);
}
.dir-thumb img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .6s ease;
}
.dir-card:hover .dir-thumb img{
  transform:scale(1.025);
}
.dir-body{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:24px 22px 22px;
}
.dir-tag{
  color:var(--gold);
  font-size:12px;
  font-weight:600;
  letter-spacing:.1em;
}
.dir-body h3{
  font-family:var(--font-serif);
  font-size:20px;
  color:var(--text);
  font-weight:600;
  line-height:1.35;
}
.dir-body h3 a{
  transition:color .2s ease;
}
.dir-body h3 a:hover{
  color:var(--gold-bright);
}
.dir-body p{
  color:var(--body);
  font-size:14px;
  line-height:1.75;
  flex:1;
}
.dir-link-zone{
  margin-top:4px;
}

/* 适用场景 */
.scene-layout{
  display:grid;
  grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  gap:72px;
  align-items:start;
}
.scene-guide h3{
  font-family:var(--font-serif);
  font-size:clamp(24px,2.6vw,32px);
  color:var(--text);
  line-height:1.4;
  font-weight:600;
  max-width:17em;
}
.scene-guide p{
  margin-top:20px;
  color:var(--body);
  font-size:15px;
  line-height:1.9;
  max-width:30em;
}
.scene-guide .text-link{
  margin-top:24px;
}
.scene-cards{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.scene-card{
  border:1px solid var(--border);
  background:var(--panel);
  border-radius:var(--radius-m);
  padding:24px 22px;
  transition:border-color .2s ease,background-color .2s ease;
}
.scene-card:nth-child(even){
  transform:translateY(14px);
}
.scene-card:hover{
  border-color:var(--border-strong);
  background:var(--panel-hover);
}
.scene-card .scene-index{
  display:inline-block;
  color:var(--gold);
  font-size:13px;
  letter-spacing:.08em;
  margin-bottom:16px;
}
.scene-card h4{
  font-size:18px;
  font-weight:600;
  color:var(--text);
  line-height:1.4;
}
.scene-card p{
  margin-top:10px;
  color:var(--body);
  font-size:14px;
  line-height:1.75;
}

/* FAQ */
.faq-wrap{
  max-width:880px;
}
.faq-item{
  border-bottom:1px solid var(--border);
  list-style:none;
}
.faq-item:first-of-type{
  border-top:1px solid var(--border);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:24px 4px;
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{
  display:none;
}
.faq-item h3{
  font-size:17px;
  font-weight:500;
  color:var(--text);
  line-height:1.6;
  transition:color .2s ease;
}
.faq-item summary:hover h3{
  color:var(--gold-bright);
}
.faq-plus{
  color:var(--gold);
  font-size:26px;
  font-weight:300;
  line-height:1;
  flex:none;
  transition:transform .2s ease;
}
.faq-item[open] .faq-plus{
  transform:rotate(45deg);
}
.faq-answer{
  padding:0 36px 26px 4px;
  color:var(--body);
  font-size:15px;
  line-height:1.9;
}
.faq-answer p + p{
  margin-top:12px;
}

/* CTA */
.cta-band{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  padding:clamp(72px,8vw,110px) 0;
  background:var(--bg-deep);
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:-1;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  opacity:.2;
}
.cta-inner{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);
  align-items:center;
  gap:48px;
}
.cta-title{
  margin-top:16px;
  font-family:var(--font-serif);
  font-size:clamp(30px,3.6vw,44px);
  font-weight:600;
  color:var(--text);
  line-height:1.3;
  max-width:16em;
}
.cta-copy{
  margin-top:18px;
  color:var(--body);
  font-size:16px;
  line-height:1.9;
  max-width:34em;
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
}

/* 页脚 */
.footer{
  background:var(--bg-deep);
  border-top:1px solid var(--border);
  padding:60px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.7fr) minmax(0,.9fr) minmax(0,1fr) minmax(0,1.1fr);
  gap:32px;
}
.footer .brand{
  font-size:22px;
}
.footer-brand p{
  margin:18px 0 0;
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
  max-width:36em;
}
.footer-col h4,
.footer-contact div strong{
  font-size:14px;
  color:var(--text);
  font-weight:600;
  letter-spacing:.05em;
}
.footer-col ul{
  margin-top:18px;
  display:grid;
  gap:12px;
}
.footer-col ul a{
  color:var(--muted);
  font-size:14px;
  transition:color .2s ease;
}
.footer-col ul a:hover{
  color:var(--gold);
}
.footer-contact{
  display:grid;
  align-content:start;
  gap:20px;
}
.footer-contact div{
  color:var(--muted);
  font-size:14px;
  line-height:1.8;
}
.footer-contact a{
  color:var(--body);
  transition:color .2s ease;
}
.footer-contact a:hover{
  color:var(--gold);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:14px;
  margin-top:48px;
  padding-top:20px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:13px;
}

/* 响应式 */
@media (max-width:1024px){
  .hero-inner{
    grid-template-columns:minmax(0,1fr) minmax(260px,.85fr);
    gap:40px;
  }
  .directory-grid{
    grid-template-columns:1fr 1fr;
  }
  .dir-card{
    grid-template-columns:150px minmax(0,1fr);
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width:860px){
  .hero-inner{
    grid-template-columns:1fr;
    gap:36px;
  }
  .section-head{
    grid-template-columns:1fr;
    margin-bottom:38px;
  }
  .scene-layout{
    grid-template-columns:1fr;
    gap:36px;
  }
  .scene-cards{
    grid-template-columns:1fr 1fr;
  }
  .road-row{
    grid-template-columns:60px 1fr;
    gap:10px 22px;
    grid-template-areas:
      "index stage"
      "copy copy"
      "result result";
  }
  .road-index{grid-area:index;}
  .road-stage{grid-area:stage;}
  .road-desc{grid-area:copy;}
  .road-result{grid-area:result;border-left:0;padding:14px 0 0;border-top:1px solid var(--border);margin-top:6px;}
}
@media (max-width:720px){
  .container{
    width:calc(100% - 32px);
  }
  .header-top{
    min-height:58px;
  }
  .metrics-grid{
    grid-template-columns:1fr;
  }
  .metric-item{
    border-right:0;
    border-bottom:1px solid var(--border);
    padding:20px 0;
  }
  .metric-item:last-child{
    border-bottom:0;
  }
  .directory-grid{
    grid-template-columns:1fr;
  }
  .dir-card{
    grid-template-columns:128px minmax(0,1fr);
  }
  .dir-thumb{
    min-height:220px;
  }
  .dir-body{
    padding:18px 16px;
  }
  .cta-inner{
    grid-template-columns:1fr;
    gap:28px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .footer-bottom{
    flex-direction:column;
    margin-top:36px;
  }
  .footer-contact{
    grid-column:auto;
  }
}
@media (max-width:560px){
  .brand{
    font-size:20px;
  }
  .brand-mark{
    width:30px;
    height:30px;
  }
  .header-brand-cta{
    display:none;
  }
  .search-form .search-input{
    transition:width .3s ease,opacity .2s ease;
  }
  .search-form.expanded .search-input{
    width:128px;
    padding-left:12px;
  }
  .hero-title{
    font-size:clamp(38px,12vw,56px);
  }
  .hero-actions .btn{
    width:100%;
  }
  .scene-cards{
    grid-template-columns:1fr;
  }
  .scene-card:nth-child(even){
    transform:none;
  }
  .directory-grid{
    gap:14px;
  }
  .dir-card{
    grid-template-columns:106px minmax(0,1fr);
    gap:0;
  }
  .dir-thumb{
    min-height:210px;
  }
  .dir-body{
    padding:14px 14px 16px;
  }
  .dir-body h3{
    font-size:17px;
  }
  .dir-body p{
    font-size:13px;
  }
  .road-row{
    grid-template-columns:1fr;
    grid-template-areas:
      "index"
      "stage"
      "copy"
      "result";
  }
  .road-index{
    margin-bottom:6px;
  }
  .road-stage{
    margin-bottom:8px;
  }
}

@media (min-width:901px){
  .search-form .search-input{
    width:190px;
    padding-left:16px;
    padding-right:6px;
    opacity:1;
  }
}
@media (prefers-reduced-motion:reduce){
  *{
    scroll-behavior:auto!important;
    transition-duration:.01ms!important;
    animation-duration:.01ms!important;
  }
  .dir-card:hover{
    transform:none;
  }
  .dir-thumb img{
    transform:none!important;
  }
}

/* roulang page: category2 */
:root {
  --bg: #0B0E13;
  --bg-deep: #080A0E;
  --bg-soft: #10141C;
  --panel: #11161F;
  --panel-2: #151C26;
  --panel-3: #1A2230;
  --border: #263040;
  --border-soft: rgba(38, 48, 64, 0.62);
  --border-strong: #3E4B5F;
  --gold: #C7A871;
  --gold-light: #DCBE84;
  --gold-soft: rgba(199, 168, 113, 0.16);
  --ink: #E9E6DE;
  --body: #AAB4C2;
  --muted: #7C8799;
  --success: #6FA88D;
  --warning: #C69B6F;
  --danger: #C47A6E;
  --radius: 4px;
  --radius-pill: 999px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--body);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  display: block;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
p {
  margin: 0 0 1em;
}
p:last-child {
  margin-bottom: 0;
}
h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.3;
}
button,
input {
  font: inherit;
}
button {
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.container {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}
.no-scrollbar {
  scrollbar-width: none;
}
.no-scrollbar::-webkit-scrollbar {
  display: none;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 500;
  font-size: 15px;
  line-height: 1.2;
  transition: background .25s ease, border-color .25s ease, color .25s ease, transform .15s ease, box-shadow .25s ease;
  user-select: none;
}
.btn:active {
  transform: translateY(1px);
}
.btn-primary {
  background: var(--gold);
  color: #14181F;
}
.btn-primary:hover {
  background: var(--gold-light);
  box-shadow: 0 8px 18px rgba(199, 168, 113, 0.16);
}
.btn-primary:active {
  background: #B99B63;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0);
  border-color: #4B5666;
  color: #C7CBD4;
}
.btn-ghost:hover {
  border-color: var(--gold);
  color: #fff;
  background: rgba(199, 168, 113, 0.06);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
}
.btn .arrow {
  transition: transform .2s ease;
}
.btn:hover .arrow {
  transform: translateX(4px);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(11, 14, 19, 0.97);
  border-bottom: 1px solid var(--border);
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  color: var(--gold);
  width: 28px;
  height: 28px;
  display: inline-flex;
}
.brand-mark svg {
  width: 100%;
  height: 100%;
}
.brand-name {
  font-family: var(--serif);
  font-size: 21px;
  color: var(--ink);
  letter-spacing: .06em;
  line-height: 1;
  white-space: nowrap;
}
.brand-name em {
  font-style: normal;
  font-size: .78em;
  color: var(--gold);
  margin-left: 4px;
  letter-spacing: .1em;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-form {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input {
  width: 0;
  border: 1px solid transparent;
  background: transparent;
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 14px;
  padding: 0;
  opacity: 0;
  transition: width .28s ease, padding .28s ease, opacity .28s ease, border-color .28s ease, background .28s ease;
  outline: none;
}
.search-form.is-open .search-input {
  width: 210px;
  padding: 9px 12px;
  opacity: 1;
  background: #0D1118;
  border-color: #394455;
}
.search-form.is-open .search-input:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(199, 168, 113, 0.14);
}
.search-btn {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  color: var(--muted);
  border: 1px solid transparent;
  transition: border-color .25s ease, color .25s ease, background .25s ease;
}
.search-btn:hover {
  color: var(--ink);
  border-color: var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
}
.channel-wrap {
  border-top: 1px solid rgba(38, 48, 64, 0.8);
  background: rgba(11, 14, 19, 0.66);
}
.nav-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding: 8px 0;
}
.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
  font-size: 14px;
  color: #718096;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  padding: 7px 15px;
  letter-spacing: .02em;
  transition: background .22s ease, color .22s ease, border-color .22s ease;
}
.nav-item::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
  opacity: 0;
  transition: opacity .2s ease;
}
.nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
}
.nav-item.active {
  color: #F2EFE9;
  border-color: rgba(199, 168, 113, 0.5);
  background: rgba(199, 168, 113, 0.08);
}
.nav-item.active::before {
  opacity: 1;
}

/* Sections */
.section {
  padding: 96px 0;
}
.section + .section {
  border-top: 1px solid var(--border-soft);
}
.section-flow {
  background: #0D121A;
}
.section-kicker {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12px;
  letter-spacing: .28em;
  color: var(--gold);
  margin-bottom: 20px;
  font-weight: 500;
}
.section-kicker::after {
  content: "";
  height: 1px;
  width: 72px;
  background: var(--border-strong);
}
.section-title {
  font-size: clamp(2rem, 3.9vw, 2.75rem);
  letter-spacing: .02em;
  margin-bottom: 22px;
  max-width: 16em;
}
.section-desc {
  font-size: 16px;
  color: var(--body);
  max-width: 48em;
  margin: 0;
}
.split-head {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 40px;
}

/* Hero */
.hero-equipment {
  min-height: 76vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background-image:
    linear-gradient(90deg, rgba(11, 14, 19, 0.96) 0%, rgba(11, 14, 19, 0.82) 52%, rgba(11, 14, 19, 0.5) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size: cover;
  background-position: 52% center;
}
.hero-equipment::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 14, 19, 0.04) 0%, rgba(11, 14, 19, 0.2) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
}
.hero-copy {
  max-width: 800px;
  padding: 100px 0 96px;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--gold);
  margin-bottom: 28px;
}
.hero-eyebrow::before {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--gold);
}
.hero-equipment h1 {
  font-size: clamp(44px, 7vw, 75px);
  line-height: 1.18;
  letter-spacing: .01em;
  color: var(--ink);
  margin-bottom: 30px;
  font-weight: 500;
}
.hero-lead {
  max-width: 38em;
  font-size: 17px;
  line-height: 1.9;
  color: #C3CBD6;
  margin-bottom: 42px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: .18em;
  z-index: 2;
}
.hero-scroll-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}
.hero-scroll::after {
  content: "";
  width: 1px;
  height: 12px;
  background: var(--gold);
  opacity: .55;
}

/* Intro metrics */
.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 50px;
}
.metric-cell {
  background: var(--panel);
  padding: 30px 28px;
  transition: background .25s ease;
}
.metric-cell:hover {
  background: var(--panel-2);
}
.metric-num {
  font-family: var(--serif);
  font-size: 2.65rem;
  color: var(--gold);
  line-height: 1.1;
  margin-bottom: 8px;
}
.metric-label {
  color: var(--ink);
  font-weight: 500;
  font-size: 15px;
  margin-bottom: 6px;
}
.metric-description {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}

/* Compare entries */
.compare-list {
  border-top: 1px solid var(--border);
  margin-top: 30px;
}
.compare-entry {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) 350px;
  grid-template-areas: "index content media";
  gap: 46px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
  transition: background .2s ease;
}
.compare-entry:nth-child(even) {
  grid-template-columns: 350px minmax(0, 1fr) 120px;
  grid-template-areas: "media content index";
}
.entry-index {
  grid-area: index;
  font-family: var(--serif);
  font-size: clamp(2rem, 4.6vw, 3rem);
  color: var(--border-strong);
  line-height: 1;
  align-self: start;
  transition: color .25s ease;
}
.compare-entry:hover .entry-index {
  color: var(--gold);
}
.entry-content {
  grid-area: content;
}
.entry-title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 21px;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 12px;
}
.entry-summary {
  color: var(--body);
  font-size: 15px;
  line-height: 1.85;
  max-width: 52em;
}
.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(199, 168, 113, 0.08);
  border: 1px solid rgba(199, 168, 113, 0.22);
  color: #C7CBD4;
  font-size: 12px;
  letter-spacing: .03em;
}
.entry-media {
  grid-area: media;
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #0E131B;
  border: 1px solid var(--border);
}
.entry-media img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  filter: saturate(.82) brightness(.96);
  transition: transform .5s ease, filter .3s ease;
}
.compare-entry:hover .entry-media img {
  transform: scale(1.02);
  filter: saturate(.9) brightness(1);
}

/* Flow */
.flow-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px 52px;
}
.flow-prose {
  font-size: 16px;
  line-height: 1.9;
  max-width: 38em;
}
.flow-prose p + p {
  margin-top: 18px;
}
.flow-list {
  margin-top: 6px;
}
.flow-item {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.flow-item:first-child {
  border-top: 1px solid var(--border);
}
.flow-num {
  font-family: var(--serif);
  font-size: 26px;
  color: var(--gold);
  line-height: 1;
}
.flow-item-title {
  font-weight: 600;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.4;
}
.flow-item-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

/* Scene section */
.scene-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 72px;
  align-items: center;
}
.scene-media {
  position: relative;
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0D1118;
}
.scene-media img {
  width: 100%;
  max-height: 620px;
  aspect-ratio: 3/4;
  object-fit: cover;
  filter: saturate(.78) brightness(.92) contrast(1.04);
}
.scene-media figcaption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  margin: 0;
  padding: 8px 14px;
  background: rgba(8, 10, 14, 0.78);
  backdrop-filter: none;
  color: #E0DFD7;
  font-size: 12px;
  border: 1px solid rgba(199, 199, 199, .12);
  border-radius: var(--radius-pill);
}
.scene-subtitle {
  color: var(--gold);
  font-size: 13px;
  letter-spacing: .12em;
  margin-bottom: 12px;
  display: block;
}
.scene-title {
  font-family: var(--serif);
  font-size: 27px;
  margin-bottom: 32px;
  line-height: 1.4;
}
.scene-list {
  border-top: 1px solid var(--border);
}
.scene-item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.scene-item-number {
  font-family: var(--serif);
  font-size: 24px;
  color: var(--gold);
  line-height: 1;
}
.scene-item-wrap strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 4px;
}
.scene-item-wrap p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

/* FAQ */
.faq-width {
  max-width: 880px;
}
.faq-list {
  border-bottom: 1px solid var(--border);
  margin-top: 24px;
}
.faq-item {
  border-top: 1px solid var(--border);
  transition: background .2s ease;
}
.faq-item[open] {
  background: rgba(255, 255, 255, 0.015);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 24px 8px 24px 0;
  cursor: pointer;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
  list-style: none;
  line-height: 1.5;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  color: var(--gold-light);
}
.faq-icon {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--gold);
  font-size: 20px;
  font-weight: 300;
  transition: transform .2s ease, border-color .2s ease, color .2s ease;
}
.faq-icon::before {
  content: "+";
  line-height: 1;
}
.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  border-color: var(--gold);
}
.faq-answer {
  padding: 0 8px 28px 0;
  color: var(--body);
  font-size: 15px;
  line-height: 1.9;
  max-width: 62em;
}

/* CTA */
.cta-panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 76px 64px;
  background-image:
    linear-gradient(120deg, rgba(8, 10, 14, 0.96) 20%, rgba(8, 10, 14, 0.78) 62%, rgba(8, 10, 14, 0.55)),
    url("/assets/images/backpic/back-1.webp");
  background-size: cover;
  background-position: center;
}
.cta-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  background: linear-gradient(90deg, rgba(199, 168, 113, 0.05), transparent 30%);
  pointer-events: none;
}
.cta-copy {
  position: relative;
  z-index: 1;
  max-width: 650px;
}
.cta-title {
  font-size: clamp(26px, 4vw, 38px);
  margin-bottom: 18px;
}
.cta-copy .section-desc {
  color: #BAC3D0;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.cta-mail {
  margin-top: 20px;
  color: var(--muted);
  font-size: 13px;
}
.cta-mail a {
  color: var(--gold);
  border-bottom: 1px solid rgba(199, 168, 113, 0.3);
  transition: border-color .2s ease, color .2s ease;
}
.cta-mail a:hover {
  border-color: var(--gold);
  color: var(--gold-light);
}

/* Footer */
.footer {
  background: var(--bg-deep);
  color: var(--body);
  margin-top: 96px;
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1.1fr;
  gap: 48px;
  padding: 70px 0 54px;
  border-bottom: 1px solid var(--border);
}
.footer-brand p {
  margin-top: 20px;
  font-size: 14px;
  max-width: 30em;
  color: var(--muted);
  line-height: 1.85;
}
.footer-col h4,
.footer-contact strong {
  font-family: var(--sans);
  font-weight: 600;
  color: var(--ink);
  font-size: 15px;
  margin-bottom: 18px;
  letter-spacing: .04em;
}
.footer-col ul li + li {
  margin-top: 10px;
}
.footer-col a {
  color: var(--body);
  font-size: 14px;
  transition: color .2s ease;
}
.footer-col a:hover {
  color: var(--gold);
}
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 14px;
  line-height: 1.6;
}
.footer-contact strong {
  display: block;
  margin-bottom: 4px;
}
.footer-contact a {
  color: var(--gold);
  font-size: 13px;
  transition: color .2s ease;
}
.footer-contact a:hover {
  color: var(--gold-light);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 22px 0 28px;
  color: var(--muted);
  font-size: 12px;
}
.footer-bottom span {
  line-height: 1.7;
}

/* Responsive */
@media (max-width: 1024px) {
  .section {
    padding: 80px 0;
  }
  .split-head {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .compare-entry,
  .compare-entry:nth-child(even) {
    grid-template-columns: 80px minmax(0, 1fr) 280px;
    gap: 30px;
  }
  .metric-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scene-wrap {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .scene-media img {
    max-height: 460px;
    aspect-ratio: 16/10;
  }
  .flow-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 36px;
  }
  .footer-contact {
    grid-column: span 2;
  }
}

@media (max-width: 820px) {
  .compare-entry,
  .compare-entry:nth-child(even) {
    grid-template-columns: 1fr;
    grid-template-areas:
      "index"
      "content"
      "media";
  }
  .entry-index {
    align-self: auto;
  }
  .hero-equipment {
    min-height: auto;
  }
  .hero-copy {
    padding: 70px 0 80px;
  }
  .header-brand-cta {
    display: none;
  }
  .search-form.is-open .search-input {
    width: 150px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(100% - 32px, 1200px);
  }
  .section {
    padding: 64px 0;
  }
  .hero-equipment h1 {
    font-size: clamp(34px, 10vw, 54px);
  }
  .hero-lead {
    font-size: 15px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .btn {
    width: 100%;
    justify-content: center;
  }
  .hero-actions .btn {
    margin-right: 0;
  }
  .header-top {
    height: 56px;
  }
  .channel-wrap {
    padding: 0 0;
  }
  .nav-tabs {
    padding: 6px 4px;
  }
  .nav-item {
    padding: 6px 12px;
    font-size: 13px;
  }
  .brand-mark {
    width: 24px;
    height: 24px;
  }
  .brand-name {
    font-size: 18px;
  }
  .metric-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1px;
  }
  .metric-cell {
    padding: 22px 18px;
  }
  .metric-num {
    font-size: 2rem;
  }
  .compare-entry {
    padding: 36px 0;
    gap: 22px;
  }
  .entry-title {
    font-size: 18px;
  }
  .entry-summary {
    font-size: 14px;
  }
  .cta-panel {
    padding: 48px 24px;
  }
  .scene-media {
    border-radius: var(--radius);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-contact {
    grid-column: auto;
  }
  .footer {
    margin-top: 64px;
  }
}

@media (max-width: 380px) {
  .metric-grid {
    grid-template-columns: 1fr;
  }
  .flow-item {
    grid-template-columns: 36px 1fr;
  }
  .faq-item summary {
    font-size: 15px;
  }
  .footer-bottom {
    font-size: 11px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category3 */
:root {
  --bg: #0B0E13;
  --bg-deep: #080A0E;
  --bg-raise: #0F141C;
  --panel: #141B24;
  --panel-hover: #1A2230;
  --line: #263040;
  --line-strong: #3E4B5F;
  --gold: #C7A871;
  --gold-hover: #DCBE84;
  --gold-soft: rgba(199, 168, 113, 0.14);
  --moon: #9AAFC3;
  --heading: #E9E6DE;
  --body: #AAB4C2;
  --muted: #7C8799;
  --inactive: #718096;
  --success: #6FA88D;
  --radius: 4px;
  --radius-pill: 999px;
  --shadow: 0 18px 46px rgba(0, 0, 0, 0.18);
  --font-head: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.no-scroll {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

input {
  font-family: inherit;
}

::selection {
  background: rgba(199, 168, 113, 0.26);
  color: #F2EFE9;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.no-scrollbar {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 26px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
  text-align: center;
}

.btn:active {
  transform: translateY(1px);
}

.btn-sm {
  height: 38px;
  padding: 0 18px;
  font-size: 14px;
}

.btn-primary {
  background: var(--gold);
  color: #14181F;
}

.btn-primary:hover {
  background: var(--gold-hover);
  color: #0C0E12;
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-ghost:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.btn-secondary {
  background: transparent;
  border: 1px solid #4B5666;
  color: #C7CBD4;
}

.btn-secondary:hover {
  border-color: var(--gold);
  color: #fff;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: #D2D8E0;
  padding: 0;
  height: auto;
}

.btn-ghost span {
  transition: transform .2s ease;
}

.btn-ghost:hover {
  color: var(--gold);
}

.btn-ghost:hover span {
  transform: translateX(4px);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: 28px;
}

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

.breadcrumb span {
  color: var(--muted);
  opacity: .65;
}

.section {
  padding: 96px 0;
}

.section + .section {
  border-top: 1px solid var(--line);
}

.section-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-transform: uppercase;
}

.section-eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
  opacity: .6;
}

.section-head {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 56px;
}

.section-title {
  font-family: var(--font-head);
  font-weight: 600;
  color: var(--heading);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.section-title em {
  font-style: normal;
  color: var(--gold);
}

.section-desc {
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 42em;
}

.section-desc strong {
  color: var(--body);
  font-weight: 500;
}

@media (max-width: 760px) {
  .section-head {
    grid-template-columns: 1fr;
    gap: 18px;
    margin-bottom: 36px;
  }
  .section {
    padding: 64px 0;
  }
}

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(11, 14, 19, 0.98);
  border-bottom: 1px solid var(--line);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 60px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand svg {
  width: 30px;
  height: 30px;
}

.brand-mark {
  display: inline-flex;
  color: var(--gold);
}

.brand-name {
  display: inline-flex;
  align-items: baseline;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--heading);
}

.brand-name em {
  font-style: normal;
  font-size: 13px;
  font-weight: 400;
  margin-left: 5px;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-form {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  height: 38px;
  overflow: hidden;
  transition: border-color .2s ease, width .2s ease;
}

.search-input {
  width: 0;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--heading);
  font-size: 13px;
  opacity: 0;
  transition: width .25s ease, opacity .2s ease, padding .25s ease;
}

.search-form.open {
  border-color: var(--gold);
}

.search-form.open .search-input {
  width: 190px;
  padding-left: 16px;
  opacity: 1;
}

.search-input::placeholder {
  color: var(--muted);
}

.search-input:focus {
  outline: none;
}

.search-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--body);
  border-radius: var(--radius-pill);
}

.search-btn:hover {
  color: var(--gold);
}

.search-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 1px;
}

.header-brand-cta {
  display: inline-flex;
}

.channel-wrap {
  background: var(--bg-raise);
  border-top: 1px solid var(--line);
}

.nav-tabs {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
}

.nav-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  color: var(--inactive);
  font-weight: 500;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #E4E1D8;
}

.nav-item.active {
  color: #F2EFE9;
  background: var(--gold-soft);
  border-color: rgba(199, 168, 113, 0.42);
}

@media (max-width: 640px) {
  .nav-item {
    padding: 0 14px;
    font-size: 13px;
  }
  .header-brand-cta {
    display: none;
  }
  .brand-name {
    font-size: 19px;
  }
  .brand-name em {
    font-size: 12px;
  }
  .header-top {
    gap: 12px;
  }
  .search-form.open .search-input {
    width: 132px;
  }
}

/* hero */
.category-hero {
  position: relative;
  background:
    linear-gradient(to bottom, rgba(11, 14, 19, 0.78), rgba(11, 14, 19, 0.96)),
    url("/assets/images/backpic/back-2.webp") no-repeat center / cover;
  padding: 108px 0 120px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.category-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: 30%;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  border: 1px solid rgba(199, 168, 113, 0.18);
  pointer-events: none;
}

.category-hero .container {
  position: relative;
  z-index: 2;
}

.hero-overline {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin-bottom: 26px;
}

.hero-overline::before {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
  opacity: .5;
}

.category-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(42px, 7vw, 76px);
  font-weight: 600;
  color: var(--heading);
  letter-spacing: 0.01em;
  line-height: 1.12;
  margin-bottom: 28px;
  max-width: 7em;
}

.category-hero h1 .gold {
  color: var(--gold);
  font-style: normal;
}

.category-hero .hero-lead {
  max-width: 36em;
  font-size: 17px;
  line-height: 1.95;
  color: #BFC7D2;
  margin-bottom: 36px;
}

.category-hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.hero-scroll-line {
  position: absolute;
  bottom: 34px;
  left: 50%;
  margin-left: -1px;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--gold));
  opacity: 0.5;
  pointer-events: none;
}

@media (max-width: 640px) {
  .category-hero {
    padding: 80px 0 100px;
    background-position: 70% center;
  }
}

/* metric strip */
.metric-strip {
  border-bottom: 1px solid var(--line);
  background: var(--bg-deep);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.metric-item {
  padding: 40px 32px 40px 0;
  border-right: 1px solid var(--line);
}

.metric-item:last-child {
  border-right: none;
}

.metric-number {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(34px, 4.4vw, 54px);
  color: var(--gold);
  line-height: 1.1;
  margin-bottom: 8px;
}

.metric-label {
  color: var(--body);
  font-size: 15px;
  font-weight: 500;
}

.metric-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

@media (max-width: 900px) {
  .metric-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .metric-item:nth-child(2) {
    border-right: none;
  }
  .metric-item:nth-child(1),
  .metric-item:nth-child(2) {
    border-bottom: 1px solid var(--line);
  }
  .metric-item {
    padding: 28px 22px 28px 0;
  }
}

@media (max-width: 520px) {
  .metric-grid {
    grid-template-columns: 1fr;
  }
  .metric-item {
    border-right: none;
    border-bottom: 1px solid var(--line);
    padding: 22px 0;
  }
  .metric-item:last-child {
    border-bottom: none;
  }
}

/* intro split */
.split-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}

.split-visual {
  position: relative;
}

.split-visual .image-frame {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.split-visual .image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.split-visual .image-frame:hover img {
  transform: scale(1.02);
}

.split-aside {
  padding: 24px;
}

.split-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 600;
  color: var(--heading);
  line-height: 1.3;
  margin-bottom: 18px;
}

.split-copy > p {
  color: var(--body);
  margin-bottom: 16px;
}

.split-copy .check-list {
  margin-top: 24px;
}

.split-copy .check-list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  color: var(--body);
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.split-copy .check-list li:last-child {
  border-bottom: none;
}

.check-icon {
  color: var(--gold);
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid rgba(199, 168, 113, 0.3);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.check-icon svg {
  width: 11px;
  height: 11px;
}

.half-number {
  color: var(--gold);
  color: #D8BC85;
  font-size: 15px;
  font-family: var(--font-head);
}

@media (max-width: 1024px) {
  .split-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

/* scene cards */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 20px;
}

.scene-card {
  grid-column: span 3;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.scene-card:nth-child(2) {
  grid-column: span 2;
}

.scene-card:nth-child(3) {
  grid-column: span 3;
}

.scene-card:hover {
  background: var(--panel-hover);
  border-color: rgba(199, 168, 113, 0.3);
  transform: translateY(-3px);
}

.scene-icon {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(199, 168, 113, 0.3);
  color: var(--gold);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.scene-icon svg {
  width: 20px;
  height: 20px;
}

.scene-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 10px;
}

.scene-card p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.scene-tag {
  display: inline-block;
  margin-top: 18px;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: var(--gold-soft);
  border: 1px solid rgba(199, 168, 113, 0.18);
  color: var(--gold);
  font-size: 12px;
  letter-spacing: 0.08em;
}

@media (max-width: 960px) {
  .scene-card,
  .scene-card:nth-child(2),
  .scene-card:nth-child(3) {
    grid-column: span 4;
  }
}

@media (max-width: 620px) {
  .scene-grid {
    grid-template-columns: 1fr;
  }
  .scene-card,
  .scene-card:nth-child(2),
  .scene-card:nth-child(3) {
    grid-column: span 1;
  }
}

/* workflow */
.workflow-wrap {
  background: var(--bg-raise);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.step-item {
  position: relative;
  padding-top: 12px;
}

.step-item:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 46px;
  right: -14px;
  width: 1px;
  height: 90px;
  background: var(--line);
}

.step-index {
  font-family: var(--font-head);
  color: var(--gold);
  font-size: 20px;
  font-weight: 600;
  opacity: .9;
}

.step-line {
  width: 34px;
  height: 1px;
  background: var(--gold);
  opacity: .45;
  margin: 14px 0 20px;
}

.step-item h3 {
  font-size: 18px;
  color: var(--heading);
  font-weight: 600;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

@media (max-width: 980px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 28px;
  }
  .step-item:nth-child(2)::after {
    display: none;
  }
}

@media (max-width: 540px) {
  .steps {
    grid-template-columns: 1fr;
  }
  .step-item:not(:last-child)::after {
    display: none;
  }
}

/* quote */
.quote-block {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 64px 0;
  position: relative;
}

.quote-inner {
  max-width: 780px;
  position: relative;
  padding-left: 56px;
}

.quote-inner::before {
  content: "\201C";
  font-family: var(--font-head);
  position: absolute;
  left: 0;
  top: -20px;
  font-size: 100px;
  color: var(--gold);
  opacity: .45;
  line-height: 1;
}

.quote-inner blockquote {
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1.8;
  color: #D7D3CA;
  margin-bottom: 18px;
}

.quote-author {
  color: var(--muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.quote-author::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--gold);
}

@media (max-width: 640px) {
  .quote-inner {
    padding-left: 0;
  }
}

/* FAQ */
.faq-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
}

.faq-side {
  position: sticky;
  top: 150px;
  align-self: start;
}

.faq-side h2 {
  font-family: var(--font-head);
  font-size: 34px;
  line-height: 1.3;
  color: var(--heading);
  margin-bottom: 16px;
}

.faq-side p {
  color: var(--muted);
  font-size: 15px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  text-align: left;
  font-size: 17px;
  font-weight: 500;
  color: #D3D6DE;
  transition: color .2s ease;
}

.faq-toggle:hover {
  color: var(--gold);
}

.faq-toggle[aria-expanded="true"] {
  color: var(--heading);
  font-weight: 600;
}

.faq-icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform .2s ease;
}

.faq-icon::before {
  width: 14px;
  height: 1px;
}

.faq-icon::after {
  width: 1px;
  height: 14px;
}

.faq-toggle[aria-expanded="true"] .faq-icon::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-panel {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height .25s ease, opacity .2s ease, padding .2s ease;
}

.faq-panel.open {
  max-height: 600px;
  opacity: 1;
}

.faq-panel-inner {
  padding: 0 32px 26px 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.faq-extra {
  margin-top: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.faq-extra strong {
  display: block;
  color: var(--heading);
  margin-bottom: 6px;
}

.faq-extra a {
  color: var(--gold);
  font-size: 14px;
}

@media (max-width: 1000px) {
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .faq-side {
    position: static;
  }
}

/* related channels */
.relation-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.relation-card {
  display: flex;
  align-items: center;
  gap: 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: background .2s ease, border-color .2s ease;
}

.relation-card:hover {
  background: var(--panel-hover);
  border-color: rgba(199, 168, 113, 0.34);
}

.relation-icon {
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--gold-soft);
  border: 1px solid rgba(199, 168, 113, 0.2);
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.relation-icon svg {
  width: 22px;
  height: 22px;
}

.relation-info h3 {
  font-size: 17px;
  color: var(--heading);
  font-weight: 600;
  margin-bottom: 4px;
}

.relation-info p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 700px) {
  .relation-grid {
    grid-template-columns: 1fr;
  }
}

/* cta banner */
.cta-banner {
  background:
    linear-gradient(180deg, rgba(8, 10, 14, 0.88), rgba(11, 14, 19, 0.95)),
    url("/assets/images/backpic/back-1.webp") no-repeat center / cover;
  padding: 100px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-inner {
  max-width: 720px;
  text-align: center;
  margin: 0 auto;
}

.cta-inner .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: 20px;
}

.cta-inner .eyebrow::before,
.cta-inner .eyebrow::after {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--gold);
  opacity: .6;
}

.cta-inner h2 {
  font-family: var(--font-head);
  font-size: clamp(32px, 4.6vw, 54px);
  color: var(--heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 22px;
}

.cta-inner p {
  color: #AEB8C5;
  font-size: 16px;
  line-height: 1.9;
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.cta-contact {
  margin-top: 28px;
  font-size: 14px;
  color: var(--muted);
}

.cta-contact a {
  color: var(--gold);
}

.cta-contact a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .cta-banner {
    padding: 72px 0;
    background-position: 70% center;
  }
}

/* footer */
.footer {
  background: var(--bg-deep);
  padding: 72px 0 26px;
  border-top: 1px solid var(--line);
}

.footer .footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer .footer-brand p {
  margin-top: 18px;
  max-width: 34em;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.footer .footer-col h4,
.footer .footer-contact div strong {
  color: var(--heading);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 16px;
}

.footer .footer-col li {
  list-style: none;
  font-size: 14px;
  padding: 7px 0;
}

.footer .footer-col a,
.footer .footer-contact a {
  color: var(--muted);
  transition: color .2s ease;
}

.footer .footer-col a:hover,
.footer .footer-contact a:hover {
  color: var(--gold);
}

.footer .footer-contact {
  display: flex;
  flex-direction: column;
  gap: 16px;
  font-size: 14px;
  color: var(--muted);
}

.footer .footer-contact div br {
  display: block;
  content: "";
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line);
  padding-top: 22px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

@media (max-width: 980px) {
  .footer .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 34px;
  }
}

@media (max-width: 560px) {
  .footer .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-bottom {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}