:root {
  --bg: #f7f9fc;
  --card: #ffffff;
  --text: #1d2a3f;
  --muted: #5f6f86;
  --brand: #4169f5;
  --brand-dark: #13213c;
  --accent: #18b894;
  --line: #dfe7f3;
  --soft: #edf4ff;
  --warm: #fff5e7;
  --shadow: 0 18px 45px rgba(19, 33, 60, 0.10);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: linear-gradient(180deg, #f7f9fc 0%, #eef4ff 45%, #ffffff 100%); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1160px, calc(100% - 32px)); margin: 0 auto; }
.skip-link { position: absolute; left: -999px; top: 12px; background: var(--brand-dark); color: #fff; padding: 10px 14px; border-radius: 10px; z-index: 999; }
.skip-link:focus { left: 12px; }
.site-header { background: rgba(255,255,255,.88); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 0; }
.logo-wrap { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.logo-wrap img { width: 138px; height: auto; }
.logo-kicker { color: var(--muted); font-size: 13px; }
.nav-list { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; justify-content: flex-end; }
.nav-list a { padding: 9px 12px; border-radius: 999px; color: #263852; font-weight: 700; font-size: 14px; }
.nav-list a:hover, .nav-list a[aria-current="page"] { background: var(--soft); color: var(--brand); }
.header-domain { font-size: 13px; color: var(--muted); padding-bottom: 12px; }
.search-strip { border-top: 1px solid var(--line); background: rgba(247,250,255,.92); }
.fake-search { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 14px 0; }
.fake-search label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.fake-search input { border: 1px solid var(--line); border-radius: 16px; padding: 12px 14px; font-size: 15px; background: #fff; outline: none; }
.fake-search input:focus { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(65,105,245,.12); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 16px; padding: 12px 18px; background: var(--brand); color: #fff; font-weight: 800; box-shadow: 0 12px 25px rgba(65,105,245,.24); cursor: pointer; }
.btn.secondary { background: #fff; color: var(--brand-dark); border: 1px solid var(--line); box-shadow: none; }
.btn:hover { transform: translateY(-1px); }
.hero { padding: 42px 0 28px; }
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 34px; align-items: center; }
.breadcrumb { color: var(--muted); font-size: 14px; margin: 12px 0 0; }
.badge { display: inline-flex; align-items: center; gap: 8px; border: 1px solid #cfe0ff; background: #fff; color: var(--brand); border-radius: 999px; padding: 7px 12px; font-weight: 800; font-size: 14px; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--brand-dark); margin: 0 0 14px; }
h1 { font-size: clamp(36px, 5vw, 62px); letter-spacing: -1.5px; }
h2 { font-size: clamp(28px, 3vw, 40px); }
h3 { font-size: 22px; }
p { margin: 0 0 14px; color: var(--muted); }
.hero p { font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat-card { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 14px; box-shadow: var(--shadow); }
.stat-card strong { display: block; color: var(--brand-dark); font-size: 24px; }
.hero-media { position: relative; }
.hero-media figure { margin: 0; border-radius: 30px; overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--line); background: #fff; }
figcaption { padding: 12px 16px; color: var(--muted); font-size: 14px; background: #fff; }
.section { padding: 56px 0; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 24px; }
.section-head p { max-width: 720px; }
.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 26px; padding: 24px; box-shadow: var(--shadow); }
.card.compact { padding: 18px; }
.icon { width: 46px; height: 46px; display: inline-flex; align-items: center; justify-content: center; border-radius: 16px; background: var(--soft); color: var(--brand); font-weight: 900; margin-bottom: 14px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.tag { border-radius: 999px; background: #f0f4fb; color: #47607f; padding: 6px 10px; font-size: 13px; font-weight: 700; }
.video-grid { grid-template-columns: repeat(3, 1fr); }
.video-card { position: relative; overflow: hidden; border-radius: 26px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); }
.video-box { position: relative; aspect-ratio: 16/10; overflow: hidden; background: var(--brand-dark); }
.video-box video, .video-box img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.video-card:hover .video-box img, .video-card:focus-within .video-box img { transform: scale(1.04); }
.play-overlay { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(19,33,60,.16); opacity: 0; transition: opacity .2s ease; }
.video-card:hover .play-overlay, .video-card:focus-within .play-overlay { opacity: 1; }
.play-button { width: 64px; height: 64px; border-radius: 50%; border: 0; background: rgba(255,255,255,.94); color: var(--brand); font-size: 28px; cursor: pointer; box-shadow: 0 12px 30px rgba(0,0,0,.16); }
.video-content { padding: 18px; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.metric { background: #f7f9fd; border-radius: 14px; padding: 8px; text-align: center; color: var(--muted); font-size: 12px; }
.metric strong { display: block; color: var(--brand-dark); font-size: 15px; }
.steps { counter-reset: step; }
.step { display: grid; grid-template-columns: 56px 1fr; gap: 16px; align-items: start; }
.step-number { width: 48px; height: 48px; border-radius: 16px; background: var(--brand-dark); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-weight: 900; }
.timeline { position: relative; }
.timeline::before { content: ""; position: absolute; left: 18px; top: 10px; bottom: 10px; width: 2px; background: var(--line); }
.timeline-item { position: relative; display: grid; grid-template-columns: 52px 1fr; gap: 12px; margin-bottom: 16px; }
.timeline-dot { width: 36px; height: 36px; border-radius: 50%; background: var(--accent); border: 6px solid #e8fbf7; z-index: 1; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px 20px; box-shadow: 0 12px 24px rgba(19,33,60,.06); }
.faq details + details { margin-top: 12px; }
.faq summary { cursor: pointer; font-weight: 900; color: var(--brand-dark); }
.faq details p { margin-top: 12px; }
.review { display: flex; flex-direction: column; min-height: 220px; }
.stars { color: #f4a51c; font-weight: 900; letter-spacing: 2px; }
.review footer { margin-top: auto; color: var(--muted); font-size: 14px; }
.cta-band { background: linear-gradient(135deg, var(--brand-dark), #304a8c); color: #fff; border-radius: 32px; padding: 34px; display: grid; grid-template-columns: 1.4fr auto; gap: 24px; align-items: center; box-shadow: var(--shadow); }
.cta-band h2, .cta-band p { color: #fff; }
.domain-box { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22); border-radius: 18px; padding: 16px; color: #fff; }
.site-footer { margin-top: 40px; background: #0f1c33; color: #dfe8ff; padding: 42px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.footer-grid p, .site-footer a { color: #bfcbed; }
.footer-logo img { width: 138px; margin-bottom: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; }
.footer-nav a { border: 1px solid rgba(255,255,255,.16); border-radius: 999px; padding: 8px 12px; }
.copyright { border-top: 1px solid rgba(255,255,255,.12); margin-top: 24px; padding-top: 18px; display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; color: #bfcbed; }
.toast { position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(16px); background: var(--brand-dark); color: #fff; padding: 12px 18px; border-radius: 16px; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: .2s ease; z-index: 100; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.prose-card ul { margin: 0; padding-left: 20px; color: var(--muted); }
.inline-list { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; list-style: none; }
.inline-list li { background: #fff; border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; color: var(--muted); font-weight: 700; }
.table-wrap { overflow-x: auto; border-radius: 22px; border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; }
th { background: #f3f7ff; color: var(--brand-dark); }
@media (max-width: 900px) {
  .header-inner, .section-head, .footer-grid, .cta-band, .hero-grid { grid-template-columns: 1fr; display: grid; }
  .nav-list, .footer-nav { justify-content: flex-start; }
  .grid.cols-3, .grid.cols-2, .video-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr; }
  .fake-search { grid-template-columns: 1fr; }
  .section { padding: 42px 0; }
}