:root{--ink:#172033;--muted:#667085;--line:#e7eaf0;--brand:#e95d42;--soft:#fff5ef;--bg:#f7f8fb}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.topbar{display:flex;gap:18px;justify-content:center;font-size:13px;color:var(--muted);padding:7px 16px;background:#fbfbfd}.nav{max-width:1180px;margin:auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.logo,.footer-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px}.logo-mark{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#ff774f,#ffb347);color:#fff}.nav-links{display:flex;gap:16px;flex-wrap:wrap;color:#344054;font-weight:600}.search-wrap{max-width:1180px;margin:0 auto 14px;padding:0 20px;display:flex;gap:10px}.search-wrap input{flex:1;border:1px solid var(--line);border-radius:14px;padding:13px 15px}.search-wrap button,.btn,.actions button,.side-link,.mock-form button,.shareBtn{border:0;border-radius:14px;padding:12px 18px;background:#fff;border:1px solid var(--line);font-weight:700;cursor:pointer}.primary,.search-wrap button,.mock-form button{background:var(--brand);color:#fff;border-color:var(--brand)}main{max-width:1180px;margin:auto;padding:24px 20px}.hero,.sub-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:0 10px 30px rgba(16,24,40,.06)}.sub-hero{display:block}.eyebrow{color:var(--brand);font-weight:800}.hero h1,.sub-hero h1{font-size:42px;line-height:1.18;margin:8px 0}.hero-actions{display:flex;gap:12px;margin:20px 0}.meta-line,.metrics,.heat,.image-desc{font-size:13px;color:var(--muted)}.video-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;box-shadow:0 8px 24px rgba(16,24,40,.05)}.video-card img{width:100%;aspect-ratio:16/9;object-fit:cover}.play{position:absolute;left:50%;top:35%;transform:translate(-50%,-50%) scale(.85);width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.92);opacity:0;transition:.2s;font-weight:900}.video-card:hover .play{opacity:1;transform:translate(-50%,-50%) scale(1)}.featured .play{opacity:1}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:20px 0}.stats div,.module-card,.section-block,.content-layout aside,.author-grid article,.comments blockquote{background:#fff;border:1px solid var(--line);border-radius:22px;padding:20px}.stats b{display:block;font-size:26px;color:var(--brand)}.grid.modules{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.card-head,.section-title{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.card-head h2,.section-title h2{margin:0}.subtitle{font-weight:800;color:#344054}.module-card ul{padding-left:18px}.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.video-grid.small{grid-template-columns:1fr}.video-body{padding:16px}.tag{display:inline-block;background:var(--soft);color:var(--brand);padding:4px 10px;border-radius:999px;font-size:12px;font-weight:800}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.actions button,.actions a{font-size:13px;padding:8px 10px;border-radius:10px;background:#fafafa}.author-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.author-grid.page{grid-template-columns:repeat(2,1fr)}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;margin:10px 0}.comments blockquote{margin:12px 0}.content-layout{display:grid;grid-template-columns:1fr 280px;gap:20px;margin-top:20px}.main-article{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px}.side-link{display:block;margin:10px 0}.mock-form{display:grid;gap:12px;max-width:680px}.mock-form input,.mock-form textarea{border:1px solid var(--line);border-radius:14px;padding:13px}.site-footer{margin-top:30px;background:#182033;color:#fff;padding:32px 20px;text-align:center}.site-footer p{color:#d0d5dd}@media(max-width:900px){.hero{grid-template-columns:1fr}.grid.modules,.video-grid,.author-grid,.stats{grid-template-columns:1fr}.content-layout{grid-template-columns:1fr}.nav{align-items:flex-start;flex-direction:column}.hero h1{font-size:30px}.search-wrap{flex-direction:column}}