:root {
  --brand: #d81f3c;
  --brand-dark: #9f142b;
  --ink: #202331;
  --muted: #626b7f;
  --soft: #fff4f5;
  --line: #edf0f5;
  --paper: #ffffff;
  --shadow: 0 20px 60px rgba(32, 35, 49, .09);
}
* { 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(--ink);
  background: linear-gradient(180deg, #fff8f9 0%, #ffffff 42%);
  line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); }
.topbar { display: flex; justify-content: center; gap: .4rem; padding: .35rem 1rem; color: #fff; background: linear-gradient(90deg, var(--brand-dark), var(--brand)); font-size: .92rem; }
.nav-wrap { max-width: 1180px; margin: 0 auto; padding: .85rem 1rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.logo, .footer-logo { display: inline-flex; align-items: center; gap: .65rem; font-weight: 900; }
.logo-mark { display: inline-grid; place-items: center; width: 42px; height: 42px; color: #fff; border-radius: 16px; background: linear-gradient(135deg, var(--brand), #ff7a83); box-shadow: 0 10px 24px rgba(216,31,60,.26); }
.logo-text { font-size: 1.28rem; letter-spacing: .02em; }
.nav-menu { display: flex; gap: .85rem; align-items: center; list-style: none; margin: 0; padding: 0; flex-wrap: wrap; }
.nav-menu a { color: #323747; font-weight: 700; font-size: .95rem; padding: .45rem .2rem; }
.nav-menu a:hover { color: var(--brand); }
.nav-toggle { display: none; border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: .55rem .75rem; font-weight: 700; }
.search-panel { max-width: 1180px; margin: 0 auto; padding: 0 1rem 1rem; }
.search-panel form { display: grid; grid-template-columns: auto minmax(180px, 1fr) auto; gap: .7rem; align-items: center; padding: .75rem; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 10px 24px rgba(32,35,49,.04); }
.search-panel label { font-weight: 800; color: var(--brand-dark); }
.search-panel input { min-width: 0; border: 1px solid #dce2ee; border-radius: 14px; padding: .8rem 1rem; font-size: 1rem; }
.search-panel button, .btn { border: 0; border-radius: 999px; padding: .82rem 1.15rem; background: var(--brand); color: #fff; font-weight: 800; cursor: pointer; box-shadow: 0 12px 28px rgba(216,31,60,.22); }
.search-result { margin: .55rem 0 0; color: var(--muted); font-size: .92rem; }
main { max-width: 1180px; margin: 0 auto; padding: 2rem 1rem 4rem; }
.hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); align-items: center; gap: 2rem; min-height: 570px; }
.eyebrow { display: inline-flex; align-items: center; gap: .45rem; padding: .3rem .75rem; border-radius: 999px; background: var(--soft); color: var(--brand-dark); font-weight: 800; }
h1, h2, h3, h4, h5, h6 { line-height: 1.28; margin: 0 0 .85rem; color: #171a24; }
h1 { font-size: clamp(2.15rem, 5vw, 4.8rem); letter-spacing: -.05em; }
h2 { font-size: clamp(1.55rem, 3vw, 2.6rem); letter-spacing: -.03em; }
h3 { font-size: 1.18rem; }
p { margin: 0 0 1rem; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 760px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .85rem; margin: 1.35rem 0; }
.btn.secondary { color: var(--brand-dark); background: #fff; border: 1px solid #ffd7dd; box-shadow: none; }
.domain-card { display: grid; gap: .25rem; padding: 1rem 1.15rem; border: 1px solid #ffd7dd; background: rgba(255,255,255,.75); border-radius: 18px; max-width: 500px; }
.hero-media, .image-card { border-radius: 34px; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow); overflow: hidden; }
.hero-media figcaption, .image-card figcaption { padding: .9rem 1rem; color: var(--muted); font-size: .94rem; }
.section { margin-top: 3.4rem; }
.section-head { display: flex; justify-content: space-between; gap: 1rem; align-items: end; margin-bottom: 1.25rem; }
.section-head p { max-width: 680px; color: var(--muted); }
.grid { display: grid; gap: 1rem; }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card, .stat-card, .review, .faq-item, .timeline-item, .tip-card { background: #fff; border: 1px solid var(--line); border-radius: 26px; padding: 1.25rem; box-shadow: 0 12px 35px rgba(32,35,49,.05); }
.card p, .review p, .faq-item p, .timeline-item p, .tip-card p { color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: .8rem; }
.tag { display: inline-flex; border-radius: 999px; background: #f4f6fb; color: #5a6478; padding: .25rem .65rem; font-size: .85rem; font-weight: 700; }
.video-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.video-card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: 28px; overflow: hidden; box-shadow: 0 16px 38px rgba(32,35,49,.06); }
.video-poster { position: relative; aspect-ratio: 16/9; overflow: hidden; background: #f6f7fb; }
.video-poster img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.video-overlay { position: absolute; inset: 0; display: grid; place-items: center; opacity: 0; transition: opacity .25s ease; background: rgba(18,22,32,.22); }
.video-play { display: grid; place-items: center; width: 72px; height: 72px; border-radius: 50%; border: 0; background: rgba(255,255,255,.92); color: var(--brand); font-weight: 900; cursor: pointer; }
.video-card:hover .video-overlay, .video-card.is-active .video-overlay { opacity: 1; }
.video-card:hover img { transform: scale(1.06); }
.video-body { padding: 1rem; }
.video-meta { display: flex; gap: .65rem; flex-wrap: wrap; color: var(--muted); font-size: .9rem; }
.steps { counter-reset: step; display: grid; gap: 1rem; }
.step { position: relative; padding-left: 4.2rem; }
.step::before { counter-increment: step; content: counter(step); position: absolute; left: 1.2rem; top: 1.2rem; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 16px; background: var(--brand); color: #fff; font-weight: 900; }
.timeline { display: grid; gap: .9rem; }
.timeline-item { border-left: 5px solid var(--brand); }
.faq-item summary { cursor: pointer; font-weight: 900; color: #171a24; }
.review strong { color: var(--brand-dark); }
.breadcrumb { color: var(--muted); font-size: .95rem; margin-bottom: 1rem; }
.breadcrumb a { color: var(--brand-dark); font-weight: 800; }
.page-hero { padding: 3rem 1.5rem; border-radius: 34px; background: linear-gradient(135deg, #fff2f4, #ffffff); border: 1px solid #ffd7dd; }
.site-footer { background: #171a24; color: #eef1f7; padding: 3rem 1rem 1.4rem; }
.footer-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1.15fr .85fr .9fr; gap: 2rem; }
.site-footer p { color: #bfc6d6; }
.footer-links { list-style: none; padding: 0; margin: 0; display: grid; gap: .45rem; }
.footer-links a:hover { color: #fff; }
.copyright { max-width: 1180px; margin: 2rem auto 0; border-top: 1px solid rgba(255,255,255,.12); padding-top: 1rem; }
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .grid.three, .grid.two, .video-grid, .footer-grid { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-flex; }
  .nav-menu { display: none; width: 100%; flex-direction: column; align-items: flex-start; padding: 1rem 0 0; }
  .nav-wrap { flex-wrap: wrap; }
  .nav-menu.is-open { display: flex; }
  .search-panel form { grid-template-columns: 1fr; }
  h1 { font-size: 2.45rem; }
}