:root{--bg:#f6f7f9;--card:#ffffff;--text:#1f2933;--muted:#64748b;--line:#e5e7eb;--brand:#172033;--accent:#2563eb;--soft:#eef4ff}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1180px,92%);margin:auto}.topbar{background:#101827;color:#fff}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:18px 0}.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:24px}.logo-badge{width:42px;height:42px;border-radius:14px;background:#fff;color:#101827;display:grid;place-items:center}.menu{display:flex;gap:18px;flex-wrap:wrap;font-size:15px}.menu a{opacity:.9}.menu a:hover{opacity:1}.search-wrap{background:#fff;border-bottom:1px solid var(--line);padding:14px 0}.fake-search{display:flex;gap:10px}.fake-search input{flex:1;border:1px solid var(--line);border-radius:12px;padding:13px 15px;font-size:15px}.btn{border:0;border-radius:12px;padding:13px 18px;background:var(--accent);color:#fff;font-weight:700;cursor:pointer}.btn.secondary{background:#111827}.hero{padding:58px 0 36px}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:32px;align-items:center}.eyebrow{display:inline-flex;background:var(--soft);color:#1d4ed8;border-radius:999px;padding:6px 12px;font-weight:700;font-size:14px}.hero h1{font-size:46px;line-height:1.18;margin:18px 0 16px;color:#111827}.hero p{font-size:18px;color:var(--muted);margin:0 0 20px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap}.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}.trust div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px}.trust b{display:block;font-size:22px;color:#111827}.video-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:0 18px 50px rgba(15,23,42,.08)}.video-card .cover{aspect-ratio:16/9;object-fit:cover;width:100%}.play{position:absolute;left:50%;top:42%;transform:translate(-50%,-50%) scale(.9);width:74px;height:74px;border-radius:50%;background:rgba(255,255,255,.92);display:grid;place-items:center;opacity:0;transition:.25s}.play:after{content:"";border-left:20px solid #111827;border-top:13px solid transparent;border-bottom:13px solid transparent;margin-left:5px}.video-card:hover .play{opacity:1;transform:translate(-50%,-50%) scale(1)}.video-meta{padding:16px}.stats{display:flex;gap:14px;color:#64748b;font-size:14px;flex-wrap:wrap}.tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.tag{background:#f1f5f9;color:#334155;border-radius:999px;padding:4px 9px;font-size:12px}.section{padding:44px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section h2{font-size:30px;margin:0;color:#111827}.section .lead{color:var(--muted);margin:8px 0 0}.grid{display:grid;gap:18px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 10px 26px rgba(15,23,42,.04)}.card h3{margin:0 0 8px;color:#111827;font-size:20px}.card p{margin:0;color:var(--muted)}.step{font-size:28px;font-weight:900;color:#1d4ed8}.timeline{border-left:3px solid #dbeafe;margin-left:10px}.timeline .card{margin:0 0 16px 22px;position:relative}.timeline .card:before{content:"";position:absolute;left:-34px;top:24px;width:18px;height:18px;border-radius:50%;background:#2563eb}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:10px;overflow:hidden}.faq-q{padding:16px 18px;font-weight:800;cursor:pointer}.faq-a{padding:0 18px 16px;color:var(--muted);display:none}.faq-item.open .faq-a{display:block}.review{display:flex;flex-direction:column;gap:10px}.stars{color:#f59e0b}.contact-box{background:#111827;color:#fff;border-radius:28px;padding:32px;display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}.footer{background:#101827;color:#d1d5db;margin-top:40px;padding:34px 0}.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.breadcrumb{font-size:14px;color:#64748b;margin:22px 0}.page-title{padding:34px 0}.page-title h1{font-size:38px;margin:0}.video-list{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.notice{background:#fff7ed;border:1px solid #fed7aa;border-radius:16px;padding:14px;color:#9a3412;margin:16px 0}@media(max-width:900px){.hero-grid,.grid-3,.grid-2,.footer-grid,.contact-box,.video-list{grid-template-columns:1fr}.hero h1{font-size:34px}.menu{font-size:14px}.trust{grid-template-columns:1fr}.section-head{display:block}}