:root {
  --bg: #fbfaf7;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --ink: #1c1b1a;
  --muted: #68645d;
  --line: rgba(28, 27, 26, 0.1);
  --brand: #f6b93b;
  --brand-soft: #fff3cf;
  --brand-dark: #2a2115;
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --shadow-soft: 0 24px 70px rgba(43, 34, 18, 0.09);
  --shadow-card: 0 18px 50px rgba(43, 34, 18, 0.08);
  --container: min(1180px, calc(100vw - 36px));
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(246, 185, 59, 0.18), transparent 28rem),
    linear-gradient(180deg, #fffdf7 0%, var(--bg) 48%, #ffffff 100%);
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font: inherit; }
.skip-link { position: absolute; left: -999px; top: 12px; background: #111; color: #fff; padding: 10px 14px; border-radius: 999px; z-index: 20; }
.skip-link:focus { left: 16px; }
.site-header { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(18px); background: rgba(251, 250, 247, 0.78); border-bottom: 1px solid var(--line); }
.nav-wrap, .search-wrap, .container { width: var(--container); margin: 0 auto; }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 78px; }
.brand-mark { display: inline-flex; align-items: center; gap: 12px; min-width: 185px; }
.brand-mark img { width: 42px; height: 42px; border-radius: 14px; box-shadow: 0 10px 24px rgba(246, 185, 59, 0.26); }
.brand-name { display: block; font-size: 20px; font-weight: 800; letter-spacing: -0.02em; }
.brand-sub { display: block; font-size: 12px; color: var(--muted); line-height: 1.3; }
.nav-links { display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; }
.nav-links a { padding: 10px 14px; border-radius: 999px; color: #413d37; font-size: 15px; transition: background .25s ease, transform .25s ease, color .25s ease; }
.nav-links a:hover, .nav-links a[aria-current="page"] { background: #1c1b1a; color: #fff; transform: translateY(-1px); }
.header-cta { display: inline-flex; align-items: center; justify-content: center; padding: 11px 17px; border-radius: 999px; background: var(--brand); color: #19130b; font-weight: 800; box-shadow: 0 12px 30px rgba(246, 185, 59, 0.26); }
.search-wrap { padding: 0 0 18px; }
.fake-search { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 8px; border: 1px solid var(--line); background: rgba(255,255,255,.7); border-radius: 999px; box-shadow: 0 16px 40px rgba(43, 34, 18, 0.05); }
.fake-search label { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.fake-search input { min-width: 0; border: 0; outline: 0; background: transparent; padding: 12px 18px; color: var(--ink); }
.fake-search button, .btn, .ghost-btn { border: 0; cursor: pointer; border-radius: 999px; padding: 12px 20px; transition: transform .25s ease, box-shadow .25s ease, background .25s ease; }
.fake-search button, .btn { background: #1c1b1a; color: #fff; font-weight: 800; box-shadow: 0 14px 34px rgba(28,27,26,.16); }
.ghost-btn { background: #fff; color: #1c1b1a; border: 1px solid var(--line); font-weight: 800; }
.fake-search button:hover, .btn:hover, .ghost-btn:hover { transform: translateY(-2px); }
.search-hint { margin: 8px 18px 0; color: var(--muted); font-size: 13px; }
.hero { width: var(--container); margin: 70px auto 42px; display: grid; grid-template-columns: minmax(0, 1.02fr) minmax(320px, .98fr); align-items: center; gap: 48px; }
.eyebrow { display: inline-flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 0 0 16px; color: #6a4c14; font-weight: 800; letter-spacing: .03em; }
.eyebrow::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 8px rgba(246,185,59,.16); }
h1, h2, h3, h4 { line-height: 1.16; letter-spacing: -0.04em; margin: 0; }
h1 { font-size: clamp(42px, 7vw, 86px); max-width: 840px; }
h2 { font-size: clamp(30px, 4.2vw, 56px); }
h3 { font-size: clamp(20px, 2.1vw, 28px); }
.lead { margin: 24px 0 0; font-size: clamp(17px, 2vw, 21px); color: var(--muted); max-width: 680px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 32px; }
.hero-media { margin: 0; position: relative; border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-soft); background: #fff; border: 1px solid rgba(255,255,255,.8); }
.hero-media img { aspect-ratio: 16 / 10; width: 100%; object-fit: cover; }
.hero-media figcaption { position: absolute; left: 18px; right: 18px; bottom: 18px; padding: 12px 16px; border-radius: 999px; background: rgba(255,255,255,.82); backdrop-filter: blur(14px); color: #4a4237; font-size: 13px; }
.section { width: var(--container); margin: 96px auto; }
.section.compact { margin-top: 56px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-head p { max-width: 560px; margin: 0; color: var(--muted); }
.kicker { color: #7b5a15; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; font-size: 13px; margin: 0 0 10px; }
.intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-xl); padding: clamp(24px, 4vw, 44px); box-shadow: var(--shadow-card); }
.panel p { color: var(--muted); margin-bottom: 0; }
.feature-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.feature-list li { padding: 16px 18px; border-radius: var(--radius-md); background: #fff; border: 1px solid var(--line); }
.video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.video-card { position: relative; overflow: hidden; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-card); transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease; }
.video-card:hover { transform: translateY(-6px); box-shadow: 0 24px 70px rgba(43, 34, 18, 0.13); border-color: rgba(246,185,59,.45); }
.video-thumb { position: relative; overflow: hidden; cursor: pointer; background: var(--brand-soft); }
.video-thumb img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform .5s ease, filter .5s ease; }
.video-card:hover .video-thumb img { transform: scale(1.04); filter: saturate(1.05); }
.play-badge { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; transform: scale(.96); transition: opacity .28s ease, transform .28s ease; background: linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,.22)); }
.play-badge span { display: inline-grid; place-items: center; width: 68px; height: 68px; border-radius: 50%; color: #fff; background: rgba(28,27,26,.9); box-shadow: 0 18px 40px rgba(0,0,0,.22); }
.video-card:hover .play-badge, .video-card.is-playing .play-badge { opacity: 1; transform: scale(1); }
.video-body { padding: 20px; }
.video-body h3 { margin-bottom: 10px; font-size: 21px; }
.video-body p { color: var(--muted); margin: 0; font-size: 15px; }
.metrics { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
.metrics span, .tag { display: inline-flex; align-items: center; border-radius: 999px; padding: 6px 10px; background: #f8f6ef; color: #5d554a; font-size: 12px; font-weight: 700; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.board-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.board-card { display: flex; flex-direction: column; min-height: 250px; padding: 24px; border-radius: var(--radius-lg); background: rgba(255,255,255,.88); border: 1px solid var(--line); box-shadow: var(--shadow-card); transition: transform .28s ease, background .28s ease; }
.board-card:hover { transform: translateY(-5px); background: #fff; }
.board-card p { color: var(--muted); margin: 12px 0 18px; }
.board-meta { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; color: #6d5c3b; font-weight: 800; }
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.stat { padding: 28px; border-radius: var(--radius-lg); background: #1c1b1a; color: #fff; box-shadow: var(--shadow-card); }
.stat strong { display: block; font-size: clamp(32px, 4vw, 50px); line-height: 1; letter-spacing: -.04em; }
.stat span { color: rgba(255,255,255,.68); font-size: 14px; }
.review-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.review-card { padding: 24px; border-radius: var(--radius-lg); background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-card); }
.review-card blockquote { margin: 0 0 18px; color: #3b3731; }
.review-card footer { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 14px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { border: 1px solid var(--line); border-radius: 20px; background: #fff; overflow: hidden; }
.faq-question { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 18px; border: 0; background: transparent; text-align: left; padding: 20px 22px; cursor: pointer; font-weight: 900; color: var(--ink); }
.faq-answer { display: none; padding: 0 22px 22px; color: var(--muted); }
.faq-item.is-open .faq-answer { display: block; }
.faq-icon { width: 28px; height: 28px; border-radius: 50%; background: var(--brand-soft); display: inline-grid; place-items: center; flex: 0 0 auto; }
.join-card { display: grid; grid-template-columns: .9fr 1.1fr; gap: 24px; align-items: stretch; background: #1c1b1a; color: #fff; border-radius: var(--radius-xl); padding: clamp(26px, 5vw, 54px); box-shadow: 0 26px 90px rgba(28,27,26,.18); }
.join-card p { color: rgba(255,255,255,.72); }
.join-form { display: grid; gap: 12px; }
.join-form input, .join-form textarea { width: 100%; border: 1px solid rgba(255,255,255,.16); background: rgba(255,255,255,.08); color: #fff; border-radius: 18px; padding: 14px 16px; outline: 0; }
.join-form input::placeholder, .join-form textarea::placeholder { color: rgba(255,255,255,.48); }
.join-form button { background: var(--brand); color: #19130b; border: 0; border-radius: 999px; padding: 14px 18px; font-weight: 900; cursor: pointer; }
.form-note { min-height: 24px; color: #ffe2a6; margin: 0; }
.share-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.share-row button { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 10px 14px; cursor: pointer; font-weight: 800; }
.breadcrumb { width: var(--container); margin: 38px auto 0; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: #4b3b15; font-weight: 800; }
.page-hero { width: var(--container); margin: 58px auto 48px; padding: clamp(30px, 6vw, 64px); border-radius: var(--radius-xl); background: rgba(255,255,255,.74); border: 1px solid var(--line); box-shadow: var(--shadow-soft); }
.page-hero p { color: var(--muted); max-width: 800px; }
.content-grid { width: var(--container); margin: 48px auto 100px; display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.article-card, .timeline-card { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-card); }
.article-card p, .timeline-card p { color: var(--muted); }
.rule-list { display: grid; gap: 12px; padding: 0; margin: 20px 0 0; list-style: none; }
.rule-list li { padding: 16px 18px; border-radius: 16px; background: #f9f7f0; }
.site-footer { margin-top: 100px; background: #11100f; color: #fff; }
.footer-inner { width: var(--container); margin: 0 auto; padding: 46px 0; display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; }
.footer-brand { display: flex; gap: 14px; align-items: center; }
.footer-brand img { width: 44px; height: 44px; border-radius: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.footer-links a { color: rgba(255,255,255,.7); padding: 8px 0; }
.footer-meta { grid-column: 1 / -1; color: rgba(255,255,255,.55); border-top: 1px solid rgba(255,255,255,.1); padding-top: 18px; display: flex; gap: 16px; justify-content: space-between; flex-wrap: wrap; }
@media (max-width: 980px) {
  .nav-wrap { align-items: flex-start; flex-direction: column; padding: 18px 0; }
  .header-cta { display: none; }
  .hero, .intro-grid, .join-card, .footer-inner { grid-template-columns: 1fr; }
  .video-grid, .board-grid, .review-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .content-grid { grid-template-columns: 1fr; }
  .section-head { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 640px) {
  :root { --container: min(100vw - 24px, 1180px); }
  .nav-links { justify-content: flex-start; }
  .fake-search { grid-template-columns: 1fr; border-radius: 28px; }
  .fake-search button { width: 100%; }
  .hero { margin-top: 38px; gap: 28px; }
  .video-grid, .board-grid, .review-grid, .stats { grid-template-columns: 1fr; }
  .panel, .page-hero { border-radius: 26px; }
  .footer-links { justify-content: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; scroll-behavior: auto !important; transition-duration: .001ms !important; }
}