:root{--bg:#f7f8fb;--ink:#182033;--muted:#667085;--card:#fff;--line:#e7eaf0;--brand:#3b5bdb;--soft:#eef2ff;--shadow:0 18px 45px rgba(24,32,51,.08)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.75}a{color:inherit;text-decoration:none}.container{width:min(1180px,92vw);margin:auto}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:20px}.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:22px}.logo img{width:40px;height:40px}.nav{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}.nav a{font-weight:700;font-size:14px;color:#344054}.nav a:hover{color:var(--brand)}.search-panel{padding:0 0 14px}.search-box{display:flex;gap:10px}.search-box input{flex:1;border:1px solid var(--line);border-radius:16px;padding:13px 16px;font-size:15px;background:#fff}.search-box button,.btn{border:0;border-radius:16px;padding:13px 18px;font-weight:800;cursor:pointer}.search-box button,.btn.primary{background:var(--brand);color:#fff}.btn.ghost{background:#fff;color:var(--brand);border:1px solid #c7d2fe}.search-tip{margin:8px 0 0;color:var(--muted);font-size:13px}.hero,.page-hero{padding:58px 0;background:linear-gradient(135deg,#ffffff 0%,#eef2ff 100%)}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:38px;align-items:center}.breadcrumb{color:var(--brand);font-weight:800}.hero h1,.page-hero h1{font-size:clamp(34px,5vw,58px);line-height:1.15;margin:14px 0}.lead{font-size:18px;color:#475467}.cta-row{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0}.stats{display:flex;gap:14px;flex-wrap:wrap}.stats span{background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px 14px;box-shadow:var(--shadow)}.stats b{display:block;font-size:20px}.hero-media,.mini-image{margin:0;background:#fff;border-radius:28px;padding:14px;box-shadow:var(--shadow);border:1px solid var(--line)}.hero-media img,.mini-image img{width:100%;border-radius:22px;display:block}.hero-media figcaption,.mini-image figcaption{color:var(--muted);font-size:14px;padding:10px}.section{padding:58px 0}.section.alt{background:#fff}.section h2{font-size:32px;margin:0 0 12px}.section-intro{color:var(--muted);margin-top:0}.compact{padding-top:42px}.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card,.panel,.review,.steps article,.timeline article,.video-card{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}.icon{width:48px;height:48px;border-radius:16px;background:var(--soft);display:grid;place-items:center;font-size:22px;margin-bottom:12px}.card h3,.video-card h3{margin:0 0 8px}.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.video-thumb{height:170px;border-radius:22px;background:linear-gradient(135deg,#dbeafe,#fef3c7);position:relative;overflow:hidden}.video-thumb:before{content:"";position:absolute;inset:18px;border:2px dashed rgba(59,91,219,.24);border-radius:18px}.play{position:absolute;inset:0;margin:auto;width:58px;height:58px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.94);box-shadow:0 12px 26px rgba(0,0,0,.18);opacity:0;transform:scale(.84);transition:.25s}.video-card:hover .play{opacity:1;transform:scale(1)}.tag{position:absolute;left:14px;top:14px;background:#fff;color:var(--brand);font-weight:800;border-radius:999px;padding:4px 10px;font-size:12px}.metrics{display:flex;gap:8px;flex-wrap:wrap;color:var(--muted);font-size:13px}.metrics span{background:#f2f4f7;border-radius:999px;padding:4px 8px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}.check-list{padding:0;list-style:none}.check-list li{background:#fff;border:1px solid var(--line);border-radius:18px;margin:10px 0;padding:12px 14px}.check-list li:before{content:"✓";color:var(--brand);font-weight:900;margin-right:8px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.steps span{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:14px;background:var(--brand);color:#fff;font-weight:900}.timeline{display:grid;gap:12px}.timeline article{display:grid;grid-template-columns:80px 130px 1fr;gap:12px;align-items:center}.faq-list{display:grid;gap:12px}details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px}summary{font-weight:900;cursor:pointer}.review-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.review p{min-height:96px}.review span{display:block;color:var(--muted);font-size:13px}.json-links{display:flex;gap:12px;flex-wrap:wrap}.json-links a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:10px 14px;font-weight:800}.site-footer{background:#101828;color:#e4e7ec;padding:44px 0}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:24px}.footer-grid a{color:#e4e7ec}.footer-grid ul{list-style:none;padding:0;margin:0}.footer-grid li{margin:7px 0}.footer-logo img{background:#fff;border-radius:12px}@media(max-width:900px){.hero-grid,.two-col,.footer-grid{grid-template-columns:1fr}.card-grid,.video-grid,.steps,.review-grid{grid-template-columns:1fr 1fr}.nav{justify-content:flex-start}.header-inner{align-items:flex-start;flex-direction:column}.timeline article{grid-template-columns:1fr}}@media(max-width:560px){.card-grid,.video-grid,.steps,.review-grid{grid-template-columns:1fr}.search-box{flex-direction:column}.hero,.page-hero{padding:36px 0}.section{padding:40px 0}}