:root{
  --bg:#f7f4ef;
  --surface:#ffffff;
  --ink:#111827;
  --muted:#6b7280;
  --line:rgba(17,24,39,.12);
  --soft:#ece6dc;
  --accent:#b89563;
  --accent-dark:#85683b;
  --shadow:0 24px 70px rgba(17,24,39,.09);
  --radius:28px;
  --container:min(1180px, calc(100% - 40px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:linear-gradient(180deg,#fbfaf8 0%,var(--bg) 60%,#fff 100%);line-height:1.75;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img,video{max-width:100%;display:block}
img{height:auto}
button,input,textarea{font:inherit}
.skip-link{position:absolute;left:-999px;top:16px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:999px;z-index:999}.skip-link:focus{left:16px}
.site-header{position:sticky;top:0;z-index:40;background:rgba(251,250,248,.84);backdrop-filter:saturate(140%) blur(18px);border-bottom:1px solid var(--line)}
.header-inner{width:var(--container);margin:auto;padding:18px 0 10px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand-logo{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.02em}.brand-logo img{width:154px;height:auto}.logo-text{display:none}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 14px;color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}.main-nav a{padding:9px 14px;border-radius:999px;color:#374151;font-size:15px}.main-nav a:hover,.main-nav a[aria-current="page"]{background:#fff;box-shadow:0 8px 24px rgba(17,24,39,.06);color:#111827}
.search-shell{width:var(--container);margin:0 auto 14px}.site-search{display:grid;grid-template-columns:1fr auto;gap:10px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px;box-shadow:0 10px 30px rgba(17,24,39,.05)}.site-search input{border:0;outline:0;background:transparent;padding:12px 18px;color:var(--ink);min-width:0}.site-search button,.btn{border:0;border-radius:999px;background:var(--ink);color:#fff;padding:12px 20px;cursor:pointer;transition:.2s ease}.site-search button:hover,.btn:hover{transform:translateY(-1px);box-shadow:0 12px 24px rgba(17,24,39,.16)}.search-hint{margin:8px 18px 0;color:var(--muted);font-size:14px;min-height:24px}
main{overflow:hidden}.container{width:var(--container);margin:auto}.section{padding:92px 0}.section.compact{padding:64px 0}.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--accent-dark);font-size:14px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.eyebrow::before{content:"";width:28px;height:1px;background:var(--accent)}h1,h2,h3{line-height:1.12;margin:0 0 18px;letter-spacing:-.03em}h1{font-size:clamp(42px,7vw,92px)}h2{font-size:clamp(32px,4vw,56px)}h3{font-size:clamp(22px,2vw,28px)}p{margin:0 0 18px;color:#4b5563}.lead{font-size:clamp(18px,2vw,22px);max-width:740px}.muted{color:var(--muted)}
.hero{padding:82px 0 64px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(320px,.82fr);gap:54px;align-items:center}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:34px 0}.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.domain-pill{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 14px;color:#374151;font-size:14px}.hero-media{position:relative}.hero-card{border-radius:42px;overflow:hidden;box-shadow:var(--shadow);background:#fff;padding:12px}.hero-card img{border-radius:32px;aspect-ratio:14/9;object-fit:cover}.float-card{position:absolute;right:-18px;bottom:28px;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.7);box-shadow:0 18px 45px rgba(17,24,39,.13);border-radius:24px;padding:18px 20px;min-width:220px}.float-card strong{display:block;font-size:28px}.breadcrumb{font-size:14px;color:var(--muted);margin-bottom:26px}.breadcrumb a{color:#374151}.page-hero{padding:72px 0 28px;border-bottom:1px solid var(--line)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}.feature-image{border-radius:36px;overflow:hidden;box-shadow:var(--shadow);background:#fff;padding:10px}.feature-image img{border-radius:28px;aspect-ratio:4/3;object-fit:cover}
.grid{display:grid;gap:20px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:rgba(255,255,255,.78);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 16px 42px rgba(17,24,39,.045);transition:.24s ease}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.card .num{font-size:13px;color:var(--accent-dark);font-weight:800;letter-spacing:.1em}.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.tag,.video-tag{display:inline-flex;border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 10px;color:#4b5563;font-size:13px}.video-tag{background:#111827;color:#fff;border-color:#111827}
.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.video-card{background:#fff;border:1px solid var(--line);border-radius:32px;overflow:hidden;box-shadow:0 18px 50px rgba(17,24,39,.06);transition:.24s ease}.video-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}.video-frame{position:relative;aspect-ratio:16/10;overflow:hidden;background:#111827}.video-frame img,.video-frame video{width:100%;height:100%;object-fit:cover}.video-frame video{position:absolute;inset:0;opacity:.01}.play-button{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.88);width:70px;height:70px;border-radius:50%;border:1px solid rgba(255,255,255,.55);background:rgba(255,255,255,.86);color:#111827;display:grid;place-items:center;opacity:0;transition:.2s ease}.video-card:hover .play-button,.video-card.is-playing .play-button{opacity:1;transform:translate(-50%,-50%) scale(1)}.play-button::before{content:"";border-left:16px solid currentColor;border-top:10px solid transparent;border-bottom:10px solid transparent;margin-left:4px}.video-body{padding:22px}.video-meta{display:flex;flex-wrap:wrap;gap:10px;color:#6b7280;font-size:13px;margin:14px 0 0}.video-title{font-size:21px;font-weight:800;color:#111827;margin-bottom:10px;line-height:1.25}.video-desc{font-size:15px;color:#4b5563}.play-status{font-size:13px;color:var(--accent-dark);margin-top:12px;min-height:20px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.stat{background:#111827;color:#fff;border-radius:28px;padding:28px}.stat strong{font-size:clamp(30px,4vw,48px);display:block;line-height:1}.stat span{color:#d1d5db;font-size:14px}
.review{min-height:245px}.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:#111827;font-weight:800}.review-head{display:flex;align-items:center;gap:12px;margin-bottom:18px}.review blockquote{margin:0;color:#374151}.faq-list{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;background:transparent;border:0;padding:24px 0;text-align:left;cursor:pointer;color:#111827;font-size:19px;font-weight:800}.faq-question span:last-child{font-size:26px;color:var(--accent-dark)}.faq-answer{display:none;padding:0 0 24px;color:#4b5563;max-width:860px}.faq-item.open .faq-answer{display:block}.faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
.contact-box{display:grid;grid-template-columns:1fr 1fr;gap:26px;background:#111827;color:#fff;border-radius:38px;padding:34px}.contact-box p{color:#d1d5db}.contact-list{list-style:none;margin:22px 0 0;padding:0;color:#e5e7eb}.contact-list li{margin:10px 0}.contact-form{display:grid;gap:12px}.contact-form input,.contact-form textarea{width:100%;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.08);border-radius:18px;color:#fff;padding:13px 15px;outline:0}.contact-form input::placeholder,.contact-form textarea::placeholder{color:#c7cbd1}.contact-form button{background:#fff;color:#111827;border:0;border-radius:999px;padding:13px 18px;cursor:pointer}.form-note{font-size:13px;color:#d1d5db;min-height:20px}
.related-columns{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.related-columns a{background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;display:block}.related-columns small{display:block;color:var(--muted);margin-top:8px}.content-prose{max-width:920px}.content-prose h2{margin-top:34px;font-size:34px}.content-prose ul{padding-left:20px;color:#4b5563}.share-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.share-button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;color:#374151;font-size:14px;cursor:pointer}.share-button:hover{background:#111827;color:#fff}
.site-footer{border-top:1px solid var(--line);background:#fff;padding:46px 0 28px}.footer-grid{width:var(--container);margin:auto;display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:32px}.footer-logo img{width:150px}.footer-links{display:grid;gap:8px}.footer-links a{color:#4b5563}.footer-bottom{width:var(--container);margin:34px auto 0;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:#6b7280;font-size:14px}.notice{background:#fff9ef;border:1px solid rgba(184,149,99,.28);border-radius:24px;padding:18px;color:#6b4d25}
@media (max-width:980px){.hero-grid,.split,.contact-box{grid-template-columns:1fr}.video-grid,.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}.stats,.related-columns{grid-template-columns:repeat(2,1fr)}.float-card{right:16px}.footer-grid{grid-template-columns:1fr 1fr}.header-inner{align-items:flex-start}.nav-toggle{display:inline-flex}.main-nav{display:none;width:100%;padding-top:12px}.main-nav.open{display:flex}.header-inner{flex-wrap:wrap}}
@media (max-width:640px){:root{--container:min(100% - 28px,1180px)}.section{padding:64px 0}.hero{padding:54px 0}.site-search{grid-template-columns:1fr}.site-search button{width:100%}.video-grid,.grid-3,.grid-4,.stats,.related-columns,.footer-grid{grid-template-columns:1fr}.hero-actions{flex-direction:column}.btn{text-align:center}.contact-box{padding:24px;border-radius:28px}h1{font-size:42px}.float-card{position:static;margin:12px 4px 0}.brand-logo img{width:134px}}