:root{--bg:#edf7f4;--deep:#d8ebe6;--paper:#fbfffd;--soft:#e2f1ed;--ink:#10251f;--body:#234139;--muted:#57746c;--teal:#146f63;--green:#2f9a83;--aqua:#79bcb0;--line:rgba(16,37,31,.13);--line-strong:rgba(20,111,99,.45);--shadow:0 14px 32px rgba(16,37,31,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,var(--bg),#f8fcfa 36%,var(--bg));color:var(--body);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.site-width{width:min(960px,calc(100% - 32px));margin-inline:auto}.skip-link{position:fixed;left:12px;top:-80px;z-index:1000;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}.top-ribbon{height:22px;background:var(--ink);color:var(--aqua);position:fixed;inset:0 0 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var(--line-strong);background:var(--paper);color:var(--ink)}.menu-button{border:0;background:var(--ink);color:#f5fffc;cursor:pointer}.quick-nav{position:fixed;top:80px;left:0;right:0;z-index:70;height:46px;background:rgba(251,255,253,.94);border-bottom:1px solid var(--line)}.quick-inner{height:100%;display:flex;align-items:center;gap:28px}.quick-inner a{display:flex;align-items:center;gap:8px;min-height:44px;color:var(--muted);font-size:13px}.quick-dot{width:15px;height:15px;border:3px solid var(--teal);border-radius:50%;display:inline-block}.quick-inner a.is-current{color:var(--ink);font-weight:700}.quick-inner a.is-current .quick-dot{background:var(--green)}.site-main{padding-top:158px;padding-bottom:72px}h1,h2,h3{color:var(--ink);margin-top:0}h1{font-size:26px;line-height:1.3;letter-spacing:-.02em}h2{font-size:21px;line-height:1.35}h3{font-size:16px;line-height:1.45}p{margin:0 0 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1fr;gap:18px;padding:18px 0;border-top:1px solid var(--line)}.link-row strong{color:var(--ink)}.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-mini article{background:var(--paper);border:1px solid var(--line);padding:18px;border-radius:20px}.page-head{padding:28px 0 24px;border-bottom:1px solid var(--line)}.page-head p{max-width:790px}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}.content-card{padding:24px;background:var(--paper);border:1px solid var(--line);border-radius:22px}.content-card.full{grid-column:1/-1}.content-card p:last-child{margin-bottom:0}.timeline{display:grid;gap:0;margin-top:18px}.timeline-item{position:relative;padding:8px 0 24px 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span{color:var(--muted);font-size:12px}.search-panel{position:fixed;left:0;right:0;top:80px;z-index:99;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-12px);transition:.2s}.search-panel.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.search-card{width:min(700px,calc(100% - 32px));margin:auto;background:var(--paper);border:1px solid var(--line-strong);border-radius:0 0 24px 24px;box-shadow:var(--shadow);padding:20px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-row{display:grid;grid-template-columns:1fr 92px;gap:8px}.search-row input{min-height:44px;border:1px solid var(--line);border-radius:12px;padding:0 12px;background:#fff}.search-row button{border:0;background:var(--ink);color:#fff;cursor:pointer}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-presets a{border:1px solid var(--line);border-radius:999px;padding:7px 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@media(max-width:760px){.site-width{width:calc(100% - 32px)}.quick-nav{display:none}.site-main{padding-top:112px;padding-bottom:92px}.site-header{height:58px}.header-actions{gap:6px}.app-link,.menu-button{padding:0 12px}.lead-feature,.split-feature,.app-orbit{grid-template-columns:1fr}.round-media{margin:auto}.stagger-grid,.index-rails,.content-grid,.faq-mini{grid-template-columns:1fr}.stagger-card:nth-child(2){margin-top:0}.phase-strip{grid-template-columns:1fr}.link-row{grid-template-columns:1fr;gap:4px}.footer-groups{grid-template-columns:1fr 1fr}.site-footer{padding-bottom:92px}.menu-panel{top:88px;right:6%;width:88%;max-height:76vh}.panel-scroll{max-height:calc(76vh - 74px)}.search-panel{top:0;bottom:0;background:var(--ink);padding-top:72px}.search-card{border-radius:22px;color:var(--body)}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);left:0;right:0;bottom:0;z-index:78;background:var(--paper);border-top:1px solid var(--line-strong);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{height:48px;display:flex;align-items:center;justify-content:center;font-size:13px}.mobile-bottom a.is-current{background:var(--green);color:#f7fffd}.about-banner{height:180px}}