:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --text: #172033;
  --muted: #65758b;
  --primary: #ff7a45;
  --primary-dark: #d95728;
  --blue: #4f7cff;
  --line: #e8edf5;
  --soft: #fff4ed;
  --shadow: 0 16px 45px rgba(31, 45, 70, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; height: auto; display: block; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header {
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 14px 0; }
.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.logo img { width: 176px; height: auto; }
.main-nav { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.main-nav a { padding: 9px 12px; border-radius: 999px; color: #334155; font-size: 15px; }
.main-nav a:hover, .main-nav a.active { background: var(--soft); color: var(--primary-dark); }
.search-strip { padding: 0 0 14px; }
.search-box { display: flex; align-items: center; gap: 10px; background: #f4f7fb; border: 1px solid var(--line); border-radius: 18px; padding: 10px; }
.search-box input { flex: 1; border: 0; background: transparent; outline: none; padding: 10px 12px; font-size: 15px; }
.btn { border: 0; border-radius: 999px; background: var(--primary); color: #fff; padding: 10px 18px; cursor: pointer; font-weight: 700; display: inline-flex; align-items: center; gap: 6px; }
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #eef3ff; color: #3555b7; }
.btn.ghost { background: #fff; color: var(--text); border: 1px solid var(--line); }
.hero { padding: 42px 0 28px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr); gap: 26px; align-items: stretch; }
.hero-card, .panel, .content-card { background: var(--surface); border: 1px solid var(--line); border-radius: 28px; box-shadow: var(--shadow); }
.hero-card { padding: 34px; position: relative; overflow: hidden; }
.hero-card::after { content: ""; position: absolute; right: -90px; top: -120px; width: 300px; height: 300px; border-radius: 999px; background: rgba(255,122,69,.14); }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--primary-dark); font-weight: 800; font-size: 14px; background: var(--soft); border-radius: 999px; padding: 7px 12px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 12px; }
h1 { font-size: clamp(32px, 5vw, 54px); letter-spacing: -.04em; }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }
p { margin: 0 0 12px; }
.lead { color: #3b4a5f; font-size: 18px; max-width: 720px; }
.domain-pill { display: inline-flex; align-items: center; gap: 7px; border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 8px 12px; color: var(--muted); font-size: 14px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 26px; }
.stat { background: #f8fafc; border: 1px solid var(--line); border-radius: 20px; padding: 16px; }
.stat strong { display: block; font-size: 24px; color: var(--text); }
.stat span { color: var(--muted); font-size: 13px; }
.hero-media { overflow: hidden; }
.hero-media figure { margin: 0; height: 100%; }
.hero-media img { width: 100%; height: 340px; object-fit: cover; }
figcaption { padding: 12px 16px; color: var(--muted); font-size: 13px; background: #fff; border-top: 1px solid var(--line); }
.section { padding: 34px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.section-head p { color: var(--muted); max-width: 740px; }
.more { color: var(--primary-dark); font-weight: 800; white-space: nowrap; }
.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 24px; overflow: hidden; box-shadow: 0 10px 30px rgba(31,45,70,.05); }
.card-body { padding: 18px; }
.card p { color: var(--muted); }
.meta { display: flex; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 13px; margin: 10px 0; }
.tag { border-radius: 999px; background: #f3f6fb; color: #44546a; padding: 5px 9px; font-size: 12px; }
.video-card .video-shell { position: relative; background: #111827; overflow: hidden; aspect-ratio: 16/9; }
.video-card img, .video-card video { width: 100%; height: 100%; object-fit: cover; transition: transform .28s ease; }
.play-badge { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; transition: opacity .24s ease; background: rgba(0,0,0,.26); color: #fff; }
.play-badge span { width: 62px; height: 62px; border-radius: 999px; background: rgba(255,255,255,.92); color: var(--primary); display: grid; place-items: center; font-weight: 900; box-shadow: 0 8px 24px rgba(0,0,0,.18); }
.video-card:hover .play-badge { opacity: 1; }
.video-card:hover img { transform: scale(1.04); }
.hot-list { display: grid; gap: 12px; }
.hot-item { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; padding: 14px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.rank { width: 34px; height: 34px; border-radius: 12px; background: var(--soft); color: var(--primary-dark); display: grid; place-items: center; font-weight: 900; }
.kpi { color: var(--muted); font-size: 13px; white-space: nowrap; }
.author { display: flex; gap: 14px; align-items: center; }
.avatar { width: 58px; height: 58px; border-radius: 18px; background: linear-gradient(135deg, #ffb083, #7aa2ff); display: grid; place-items: center; color: #fff; font-weight: 900; flex: 0 0 auto; }
.comment { padding: 18px; }
.comment blockquote { margin: 0; color: #39485d; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 14px 18px; }
.faq details + details { margin-top: 12px; }
.faq summary { cursor: pointer; font-weight: 800; }
.cta { background: linear-gradient(135deg, rgba(255,122,69,.13), rgba(79,124,255,.13)); border: 1px solid var(--line); border-radius: 28px; padding: 28px; }
.info-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); }
.info-table th, .info-table td { text-align: left; padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
.info-table th { width: 150px; background: #f7f9fd; }
.breadcrumb { margin: 22px 0 0; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--primary-dark); font-weight: 700; }
.page-title { padding: 34px 0 14px; }
.page-title .panel { padding: 28px; }
.article-list { display: grid; gap: 16px; }
.article { padding: 18px; display: grid; grid-template-columns: 180px 1fr; gap: 18px; }
.article img { border-radius: 18px; aspect-ratio: 16/10; object-fit: cover; }
.site-footer { margin-top: 40px; background: #111827; color: #e5e7eb; padding: 36px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr repeat(3, .8fr); gap: 24px; }
.site-footer .logo img { filter: brightness(0) invert(1); }
.site-footer a { color: #e5e7eb; display: block; margin: 8px 0; }
.site-footer p, .site-footer small { color: #aeb8c7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 24px; padding-top: 18px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%) translateY(20px); background: #172033; color: #fff; padding: 12px 18px; border-radius: 999px; opacity: 0; pointer-events: none; transition: .22s ease; z-index: 50; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
@media (max-width: 920px) {
  .header-inner, .section-head { align-items: flex-start; flex-direction: column; }
  .hero-grid, .grid.cols-3, .grid.cols-4, .grid.cols-2, .footer-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; }
  .article { grid-template-columns: 1fr; }
  .main-nav { width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .hero-card { padding: 24px; }
}