:root{--paper:#F3F8FD;--deep:#0E3A5C;--text:#24384C;--muted:#5A7388;--soft:#7A93A8;--sky:#5BA3D0;--tide:#3D7EA6;--mist:#C5E4F5;--sand:#E8C9A0;--line:rgba(14,58,92,.12);--shadow:0 14px 34px rgba(14,58,92,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.75 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}.shell{width:min(1120px,calc(100% - 32px));margin:auto}.site-top{position:fixed;inset:0 0 auto;z-index:100}.tide-line{height:28px;background:var(--tide);color:#fff;font-size:13px}.tide-line-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.plain-btn{border:0;background:transparent;color:#fff;min-height:28px;cursor:pointer}.tide-platform{height:50px;background:#fff;border-bottom:1px solid var(--mist)}.platform-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;min-height:44px;font-weight:800;color:var(--deep);font-size:20px}.brand img,.footer-brand img,.bay-brand img{height:26px;width:auto;object-fit:contain}.platform-actions{display:flex;gap:8px;align-items:center}.primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:10px;border:1px solid var(--sky);font-weight:700;cursor:pointer}.primary-btn{background:var(--tide);color:#fff;border-color:var(--tide)}.secondary-btn{background:#fff;color:var(--deep)}.compact{min-height:40px}.tide-bridge{height:64px;background:var(--mist);border-bottom:1px solid rgba(255,255,255,.85)}.bridge-grid{height:100%;display:grid;grid-template-columns:repeat(5,1fr)}.bridge-grid a{display:flex;align-items:center;justify-content:center;color:var(--deep);font-weight:700;border-right:1px solid rgba(255,255,255,.9)}.bridge-grid a.active{background:#fff}.site-main{padding-top:166px}.page-hero,.section-block,.content-card,.info-band{width:min(1120px,calc(100% - 32px));margin:0 auto 24px}.page-hero{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:var(--shadow)}h1,h2,h3{color:var(--deep);line-height:1.3;margin:0 0 12px}h1{font-size:clamp(28px,4vw,32px)}h2{font-size:22px}h3{font-size:18px}.eyebrow{color:var(--tide);font-weight:800;letter-spacing:.04em}.lead{font-size:17px;color:var(--muted);max-width:820px}.hero-actions,.card-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.cover-slot,.media-slot{background:linear-gradient(135deg,var(--mist),#fff);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.cover-slot{max-height:200px;min-height:160px;margin-bottom:22px}.cover-slot img{width:100%;height:100%;max-height:200px;object-fit:contain;object-position:center}.fallback-title{color:var(--deep);font-size:24px;font-weight:800}.section-block{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px}.section-block.tint{background:#EDF6FC}.section-block.dark{background:var(--deep);color:var(--mist)}.section-block.dark h2,.section-block.dark h3{color:#fff}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.topic-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}.topic-card .media-slot{height:165px;margin-bottom:14px}.topic-card .media-slot img{width:100%;height:100%;object-fit:contain}.split{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:center}.split.reverse{grid-template-columns:.85fr 1.15fr}.split .media-slot{min-height:180px;max-height:320px}.split .media-slot img{max-height:300px;width:100%;object-fit:contain}.prose p{margin:0 0 14px}.prose ul{padding-left:1.2em}.prose li{margin-bottom:8px}.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.mini-card{padding:18px;border-radius:12px;border:1px solid var(--line);background:#fff}.notice{border-left:4px solid var(--sand);padding:12px 14px;background:#fffaf4;border-radius:0 10px 10px 0}.tide-bay,.search-panel{position:fixed;z-index:130;visibility:hidden;pointer-events:none;opacity:0;transition:.2s ease}.tide-bay.show,.search-panel.show{visibility:visible;pointer-events:auto;opacity:1}.tide-bay{left:0;top:78px;width:300px;height:min(480px,calc(100vh - 90px));background:#fff;border-radius:0 0 12px 0;box-shadow:var(--shadow);overflow:auto;padding:16px}.bay-head,.search-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.bay-brand{display:flex;align-items:center;gap:8px;color:var(--deep)}.icon-btn{width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--deep);cursor:pointer;font-size:24px}.bay-group{margin-top:14px}.bay-group h2{font-size:14px;color:var(--soft);margin-bottom:6px}.bay-group a{display:block;padding:8px 10px;border-radius:8px}.bay-group a:hover{background:var(--paper)}.bay-group span{display:block;color:var(--deep);font-weight:700}.bay-group small{display:block;color:var(--muted);font-size:12px;line-height:1.45}.search-panel{left:max(16px,calc((100vw - 1120px)/2));top:78px;width:min(440px,calc(100% - 32px));background:#fff;border-radius:0 0 12px 12px;box-shadow:var(--shadow);padding:18px}.search-look{padding:16px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--muted);margin:12px 0}.search-links{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.search-links a{min-height:44px;display:flex;align-items:center;padding:0 12px;border:1px solid var(--mist);border-radius:10px;color:var(--deep)}.overlay{position:fixed;inset:0;z-index:120;background:rgba(14,58,92,.28);opacity:0;pointer-events:none}.overlay.show{opacity:1;pointer-events:auto}.ui-open{overflow:hidden}.site-footer{background:var(--deep);color:var(--mist);margin-top:40px}.footer-inner{padding:36px 0 28px}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;margin-bottom:24px}.footer-brand div{display:flex;flex-direction:column}.footer-brand span{font-size:12px;color:var(--mist)}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-grid h2{font-size:16px;color:#fff}.footer-grid a{display:block;color:var(--mist);padding:3px 0}.footer-note{border-top:1px solid rgba(197,228,245,.18);padding-top:18px;margin-top:24px;color:var(--mist)}.copyright{color:#fff;font-size:14px}.mobile-bottom{display:none}.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:12px}.faq-item h2{font-size:18px}.article-list{display:grid;gap:14px}.article-list article{padding:18px;background:#fff;border:1px solid var(--line);border-radius:12px}.app-showcase{display:grid;grid-template-columns:1fr 320px;gap:24px;align-items:start}.app-showcase .media-slot{min-height:320px}.app-showcase img{max-height:420px;object-fit:contain}.mark-row{display:flex;gap:14px;align-items:center}.mark-row img{width:64px;height:64px;object-fit:contain}.primary-btn:hover,.secondary-btn:hover,.bridge-grid a:hover,.footer-grid a:hover,.search-links a:hover{filter:brightness(.97)}a:focus-visible,button:focus-visible{outline:3px solid var(--sand);outline-offset:2px}
@media(max-width:800px){.tide-bridge{display:none}.site-main{padding-top:94px;padding-bottom:68px}.three-grid,.mini-grid,.split,.split.reverse,.app-showcase,.footer-grid{grid-template-columns:1fr}.page-hero,.section-block{padding:20px}.tide-bay{top:78px;width:calc(100% - 16px);height:62vh;border-radius:0 0 12px 0}.search-panel{top:78px;left:8px;width:calc(100% - 16px)}.mobile-bottom{position:fixed;z-index:110;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;color:var(--deep);font-size:14px}.mobile-bottom a.active{background:var(--tide);color:#fff}.site-footer{margin-bottom:50px}.platform-actions{gap:6px}.primary-btn,.secondary-btn{padding:0 12px}.cover-slot{min-height:140px}.topic-card .media-slot{height:155px}}
@media(max-width:420px){.tide-line{font-size:12px}.brand{font-size:18px}.primary-btn,.secondary-btn{font-size:14px;padding:0 10px}.page-hero,.section-block{width:min(100% - 32px,1120px)}}