:root{--bg:#f5fbff;--white:#fff;--soft:#eaf7fc;--light:#dff5fb;--cyan:#25c8d1;--sky:#25b6e8;--blue:#1787db;--ocean:#174b78;--title:#173b60;--body:#2d4359;--muted:#687f93;--line:#dcebf3;--footer:#123653;--shadow:0 14px 46px rgba(18,64,103,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}body.drawer-open{overflow:hidden}a{color:var(--ocean);text-decoration:none}a:hover{color:var(--blue)}button{font:inherit}img{max-width:100%}.container{width:min(1160px,calc(100% - 48px));margin:auto}.skip-link{position:absolute;left:12px;top:-80px;background:white;z-index:200;padding:8px 14px}.skip-link:focus{top:12px}*:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.site-header{position:sticky;top:0;z-index:40;background:#fff;box-shadow:0 1px 0 var(--line)}.header-inner{height:72px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;justify-content:center;flex:0 0 auto;min-width:118px}.brand 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21px;color:var(--title)}.hero p.lead{font-size:17px;line-height:1.85;margin:0 0 23px;max-width:600px}.hero-actions{display:flex;gap:13px;align-items:center;flex-wrap:wrap}.text-link{font-weight:800;padding:8px 0;border-bottom:1px solid var(--cyan)}.media{display:flex;align-items:center;justify-content:center;background:var(--soft);border-radius:15px;overflow:hidden;min-width:0;aspect-ratio:16/10}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-empty{background:linear-gradient(145deg,#dff5fb,#eaf7fc 62%,#d8f0ff);position:relative}.media-mark{height:45%;aspect-ratio:1;border:2px solid rgba(37,182,232,.18);border-radius:50%;position:relative}.media-mark:before,.media-mark:after{content:"";position:absolute;background:rgba(23,135,219,.11);border-radius:50%}.media-mark:before{width:50%;height:50%;left:-30%;top:20%}.media-mark:after{width:30%;height:30%;right:-20%;bottom:-10%}.hero-media{aspect-ratio:16/10}.hero-media.media-empty{background:radial-gradient(circle at 70% 30%,#98e7f1 0,transparent 45%),linear-gradient(135deg,#e0f5ff,#b8e9f4)}.page-intro{background:linear-gradient(125deg,#e7f8fc,#f5fbff);border-bottom:1px solid var(--line)}.intro-inner{padding:52px 0 46px}.page-intro h1{font-size:34px;line-height:1.4;margin:0 0 16px;color:var(--title)}.intro-inner>p:last-child{max-width:790px;font-size:17px;margin:0}.section{padding:47px 0}.section+.section{padding-top:20px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:0 0 23px}.section-title h2,h2{font-size:26px;color:var(--title);line-height:1.4;margin:0 0 17px}.section-title h2{margin:0}.section-title p{font-size:14px;margin:6px 0 0;color:var(--muted)}h3{font-size:20px;color:var(--title);line-height:1.45;margin:0 0 12px}p{margin:0 0 18px}p:last-child{margin-bottom:0}.grid{display:grid;gap:20px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-card{background:white;border:1px solid var(--line);border-radius:15px;padding:24px;box-shadow:var(--shadow)}.feature-card .num{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.12em}.feature-card h3{margin:10px 0 10px}.feature-card p{font-size:15px;color:var(--muted)}.feature-card>a:last-child{font-size:14px;font-weight:800;color:var(--blue);display:inline-block;margin-top:14px}.feature-card .media{margin:-8px -8px 20px;aspect-ratio:16/9}.split{display:grid;grid-template-columns:1fr 1fr;gap:35px;align-items:center}.split.reverse .visual{order:-1}.split .visual .media{aspect-ratio:16/10}.article{max-width:820px;margin:0 auto}.article 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