:root {
  --bg: #f6f1e7;
  --surface: rgba(255, 251, 244, 0.94);
  --surface-soft: rgba(255, 251, 244, 0.72);
  --ink: #16231d;
  --muted: #5c695f;
  --line: rgba(22, 35, 29, 0.12);
  --accent: #c9a76a;
  --accent-deep: #8f6f39;
  --green: #143326;
  --green-soft: #1f4837;
  --shadow: 0 22px 70px rgba(20, 38, 30, 0.10);
  --radius-lg: 30px;
  --radius-md: 22px;
  --radius-sm: 16px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
  background:
    radial-gradient(circle at top left, rgba(201,167,106,.18), transparent 28%),
    radial-gradient(circle at right top, rgba(20,51,38,.08), transparent 22%),
    linear-gradient(180deg, #faf6ef 0%, #f2ecdf 100%);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font: inherit; }
video { display: block; width: 100%; height: 100%; object-fit: cover; background: #1d2a23; }
.site-shell { width: min(1420px, calc(100% - 28px)); margin: 0 auto; padding: 16px 0 40px; }
.announcement {
  margin: 0 0 16px;
  padding: 12px 18px;
  border-radius: 16px;
  border: 1px solid rgba(201,167,106,.44);
  background: rgba(20, 51, 38, 0.92);
  color: #f7f1e6;
  font-size: 14px;
}
.site-header {
  position: sticky;
  top: 8px;
  z-index: 30;
  margin-bottom: 28px;
  padding: 18px 22px 20px;
  background: rgba(255, 251, 244, 0.82);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(201,167,106,.18);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.brandbar,
.brand-tools,
.main-nav,
.meta-strip,
.hero-actions,
.footer-grid { display: flex; flex-wrap: wrap; gap: 12px; }
.brandbar { justify-content: space-between; align-items: center; margin-bottom: 14px; }
.brandmark { display: inline-flex; align-items: center; gap: 14px; }
.brandmark strong {
  display: block;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: .04em;
}
.brandmark span,
.brand-tools span,
.section-intro,
.breadcrumb,
.search-feedback,
.info-meta,
.footer-card p,
.hero-list li,
.card-panel p,
.json-panel { color: var(--muted); }
.brand-tools { justify-content: flex-end; font-size: 13px; }
.main-nav { margin-bottom: 14px; }
.nav-link {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.64);
  transition: transform .24s ease, background .24s ease, border-color .24s ease;
}
.nav-link:hover,
.nav-link.is-active {
  transform: translateY(-1px);
  border-color: rgba(201,167,106,.76);
  background: rgba(201,167,106,.12);
}
.search-bar-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-bottom: 10px;
}
.search-input,
.search-trigger,
.hero-actions a {
  min-height: 52px;
  border-radius: 18px;
}
.search-input {
  border: 1px solid rgba(20,51,38,.12);
  background: rgba(255,255,255,.78);
  padding: 0 16px;
}
.search-trigger,
.hero-actions a,
.share-button {
  border: 0;
  padding: 0 18px;
  background: linear-gradient(135deg, var(--green), var(--green-soft));
  color: #f8f2e7;
  box-shadow: 0 16px 34px rgba(20,51,38,.22);
  transition: transform .24s ease, box-shadow .24s ease;
}
.search-trigger:hover,
.hero-actions a:hover,
.share-button:hover { transform: translateY(-1px); box-shadow: 0 18px 36px rgba(20,51,38,.26); }
.search-feedback { margin: 0 0 10px; font-size: 14px; }
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
}
.hero {
  padding: 50px 38px;
  min-height: 580px;
  border-radius: 36px;
  background-size: cover;
  background-position: center;
  color: #f7f1e6;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hero-small { min-height: 520px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, .8fr);
  gap: 24px;
  align-items: end;
  min-height: 460px;
}
.eyebrow {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(247,241,230,.82);
}
.hero h1,
.section-heading h2,
.card-panel h3,
.footer-card h3,
.topic-card h3,
.video-copy h3,
.trust-card h3,
.info-card h3,
.faq-item summary { margin: 0; }
.hero h1 {
  max-width: 11ch;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.03;
  letter-spacing: .02em;
}
.lead {
  max-width: 60ch;
  font-size: 18px;
  color: rgba(247,241,230,.9);
}
.meta-chip,
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.14);
  color: #f7f1e6;
  font-size: 14px;
}
.card-panel {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid rgba(201,167,106,.18);
  box-shadow: var(--shadow);
}
.hero-side {
  background: rgba(255, 248, 237, 0.16);
  color: #f7f1e6;
  backdrop-filter: blur(10px);
}
.hero-side p,
.hero-side li { color: rgba(247,241,230,.88); }
.hero-list { margin: 12px 0 0; padding-left: 18px; }
.content-section { padding: 34px 0; }
.section-heading { margin-bottom: 18px; }
.section-heading h2 { font-size: clamp(28px, 4vw, 42px); line-height: 1.15; }
.section-intro { margin: 10px 0 0; max-width: 72ch; font-size: 16px; }
.topic-grid,
.video-grid,
.trust-grid,
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.topic-card,
.trust-card,
.info-card,
.footer-card {
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(20,38,30,.06);
}
.topic-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 18px;
  margin-bottom: 14px;
}
.video-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 14px 34px rgba(20,38,30,.06);
}
.video-shell {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #1b2a22;
}
.video-tag,
.play-badge,
.video-counter {
  position: absolute;
  z-index: 2;
  border-radius: 999px;
  font-size: 13px;
}
.video-tag {
  top: 14px;
  left: 14px;
  padding: 7px 12px;
  background: rgba(20,51,38,.86);
  color: #f7f1e6;
}
.video-counter {
  right: 14px;
  bottom: 14px;
  padding: 7px 12px;
  background: rgba(247,241,230,.88);
  color: var(--green);
}
.play-badge {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(.92);
  opacity: 0;
  padding: 12px 16px;
  background: rgba(255,255,255,.9);
  color: var(--green);
  font-weight: 700;
  transition: opacity .24s ease, transform .24s ease;
}
.video-shell:hover .play-badge,
.video-card.is-active .play-badge {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.video-copy { padding: 16px 18px 18px; }
.metric-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  gap: 18px;
  align-items: start;
}
.reverse { grid-template-columns: minmax(280px, .8fr) minmax(0, 1.2fr); }
.sticky-side { position: sticky; top: 110px; }
.ordered-list { margin: 12px 0 0; padding-left: 18px; }
.status-stack { display: grid; gap: 10px; margin-top: 14px; }
.json-panel {
  margin: 0;
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: #fffdf8;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.faq-grid { display: grid; gap: 12px; }
.faq-item {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.7);
  padding: 14px 16px;
}
.faq-item summary { cursor: pointer; font-weight: 700; }
.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.keyword-chip {
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid rgba(201,167,106,.34);
  background: rgba(201,167,106,.08);
  color: var(--green);
  font-size: 14px;
}
.site-footer {
  margin-top: 16px;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(18,37,29,.98), rgba(16,31,25,.98));
  color: #f7f1e6;
}
.footer-grid { justify-content: space-between; align-items: flex-start; }
.footer-grid > * { flex: 1 1 260px; }
.footer-brand { margin-bottom: 10px; }
.footer-card {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.08);
  box-shadow: none;
}
.footer-card h3,
.site-footer strong,
.site-footer span,
.site-footer p { color: #f7f1e6; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.is-hidden { display: none !important; }
@media (max-width: 1100px) {
  .topic-grid,
  .video-grid,
  .trust-grid,
  .info-grid,
  .split-layout,
  .reverse,
  .hero-grid { grid-template-columns: 1fr; }
  .sticky-side { position: static; }
}
@media (max-width: 720px) {
  .site-shell { width: min(100%, calc(100% - 18px)); }
  .site-header { top: 4px; padding: 16px; border-radius: 22px; }
  .brandbar { align-items: flex-start; }
  .brandbar,
  .brand-tools,
  .main-nav,
  .meta-strip,
  .hero-actions,
  .footer-grid { gap: 10px; }
  .search-bar-wrap { grid-template-columns: 1fr; }
  .hero { padding: 28px 20px; min-height: 480px; border-radius: 26px; }
  .hero h1 { max-width: none; font-size: clamp(34px, 11vw, 52px); }
  .lead { font-size: 16px; }
  .section-heading h2 { font-size: 28px; }
  .video-copy,
  .topic-card,
  .trust-card,
  .info-card,
  .card-panel,
  .footer-card { padding: 16px; }
  .site-footer { padding: 22px 16px; border-radius: 24px; }
}