:root{--ink:#24384c;--blue:#3f8fd9;--paper:#f4f8fb;--line:#dbe7f0;--muted:#60758a}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;background:var(--paper);color:var(--ink);line-height:1.75}img{max-width:100%;display:block}.header{height:72px;display:flex;align-items:center;gap:28px;padding:0 max(22px,6vw);background:#fff;border-bottom:1px solid var(--line)}.brand img{width:118px;height:38px;object-fit:contain}.header nav{display:flex;gap:24px;margin-left:auto}.header nav a{text-decoration:none;color:#61788e;font-size:14px}.top-btn,.cta,.download-panel a,footer a,.mobile-bar a{background:var(--blue);color:#fff;text-decoration:none;border-radius:999px;padding:12px 20px;font-weight:700}.hero{max-width:1180px;margin:0 auto;padding:42px max(22px,6vw) 24px;display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.hero figure img{height:410px;object-fit:cover;border-radius:24px}.eyebrow{margin:0 0 10px;font-size:12px;letter-spacing:1.5px;color:var(--muted);text-transform:uppercase}.hero h1,.editorial h2,.download-panel h2,.faq header h2{margin:0 0 14px;font-size:44px;line-height:1.12}.preview-grid,.topics{max-width:1180px;margin:0 auto;padding:0 max(22px,6vw);display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.preview-grid figure,.topic-card,.download-panel,.faq details{background:#fff;border:1px solid var(--line);border-radius:22px}.preview-grid img{height:220px;object-fit:cover;border-radius:22px 22px 0 0}.preview-grid figcaption{padding:14px 16px;font-weight:700}.topics{padding-top:20px}.topic-card{padding:24px}.editorial,.faq{max-width:1180px;margin:0 auto;padding:34px max(22px,6vw)}.editorial{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center}.editorial img{height:320px;object-fit:cover;border-radius:24px}.faq-list{display:grid;gap:14px}.faq.big details{padding:22px}.faq summary{cursor:pointer;font-weight:700;list-style:none}.faq summary::-webkit-details-marker{display:none}.download-panel{max-width:1180px;margin:18px auto 40px;padding:34px max(22px,6vw);display:flex;align-items:center;justify-content:space-between;gap:16px;background:#eaf3fb}.download-panel h2,.faq header h2{font-size:32px}.mobile-bar{display:none}footer{max-width:1180px;margin:0 auto 24px;padding:0 max(22px,6vw);display:flex;justify-content:space-between;align-items:center;gap:20px}
@media(max-width:900px){body{padding-bottom:64px}.header nav,.top-btn{display:none}.header{height:62px}.hero,.preview-grid,.topics,.editorial{grid-template-columns:1fr}.hero h1{font-size:40px}.hero figure img,.preview-grid img,.editorial img{height:auto;max-height:340px}.download-panel{margin:0 18px 60px;padding:28px;display:block}.download-panel a{display:inline-block;margin-top:12px}footer{display:block;padding:0 18px}.mobile-bar{display:flex;position:fixed;left:0;right:0;bottom:0;height:62px;background:#fff;border-top:1px solid var(--line);align-items:center;justify-content:space-between;padding:0 16px;z-index:40}}
@media(min-width:1600px){.header{padding-inline:max(24px,calc((100vw - 1240px)/2))}}