:root{--bg:#F3F6F9;--surface:#FFFFFF;--surface-2:#E8EEF5;--ink:#0B1220;--text:#1E293B;--muted:#475569;--soft:#64748B;--blue:#2563EB;--blue-light:#60A5FA;--blue-dark:#1D4ED8;--lime:#65A30D;--slate:#334155;--line:rgba(37,99,235,.16);--shadow:0 14px 36px rgba(11,18,32,.08);--radius:18px;--max:1180px;--header:136px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.72 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;overflow-x:hidden}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.site-shell{width:min(calc(100% - 32px),var(--max));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:2000;background:#fff;color:var(--blue-dark);padding:10px 16px;border-radius:999px;box-shadow:var(--shadow)}.skip-link:focus{top:8px}.site-header{position:fixed;inset:0 0 auto;z-index:1200}.status-bar{height:32px;background:var(--slate);color:#fff}.status-inner{height:32px;display:flex;align-items:center;justify-content:space-between;font-size:13px}.status-brand{font-weight:700;letter-spacing:.03em}.text-button{border:0;background:transparent;color:#fff;min-width:44px;height:32px;padding:0 4px}.command-bar{height:60px;background:#fff;border-bottom:1px solid var(--line)}.command-inner{height:60px;display:grid;grid-template-columns:80px 1fr 110px;align-items:center}.square-button{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:12px;display:grid;place-content:center;gap:4px}.square-button span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}.command-logo{justify-self:center;display:flex;align-items:center;min-height:44px}.command-logo img{max-height:32px;width:auto}.command-logo strong{font-size:20px;color:var(--ink);letter-spacing:.04em}.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;color:#fff;background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%);border-radius:999px;font-weight:700}.tab-bar{height:44px;background:#fff;border-bottom:1px solid var(--line)}.tab-inner{height:44px;display:grid;grid-template-columns:repeat(6,1fr);align-items:stretch}.tab-inner a{display:flex;align-items:center;justify-content:center;position:relative;color:var(--muted);font-size:14px}.tab-inner a::after{content:"";position:absolute;left:25%;right:25%;bottom:0;height:3px;background:transparent;border-radius:3px}.tab-inner a.is-current{color:var(--blue);font-weight:700}.tab-inner a.is-current::after{background:var(--blue)}a:focus-visible,button:focus-visible{outline:3px solid rgba(37,99,235,.35);outline-offset:3px}.site-main{padding-top:calc(var(--header) + 34px);min-height:60vh}.page-hero{padding:28px 0 18px}.eyebrow{margin:0 0 10px;color:var(--blue);font-weight:800;letter-spacing:.08em;font-size:13px}.page-hero h1,.cover-copy h1{margin:0;color:var(--ink);font-size:clamp(28px,4vw,32px);line-height:1.2;letter-spacing:-.02em}.lead{max-width:800px;margin:16px 0 0;color:var(--muted);font-size:17px}.cover-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}.cover-copy{padding:clamp(24px,5vw,52px)}.cover-copy p{max-width:760px;margin:18px 0;color:var(--muted)}.cover-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button-primary,.button-secondary{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 20px;border-radius:999px;font-weight:750}.button-primary{color:#fff;background:linear-gradient(135deg,#60A5FA 0%,#2563EB 52%,#1D4ED8 100%)}.button-secondary{background:#fff;color:var(--blue-dark);border:1px solid 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p{margin:0 0 14px;color:var(--muted)}.text-link{color:var(--blue);font-weight:750}.stack-list{display:grid;gap:14px}.stack-card{display:grid;grid-template-columns:220px 1fr;gap:18px;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px}.stack-card img,.stack-card .media-slot{width:100%;height:170px;object-fit:cover}.stack-card h3{margin:2px 0 10px;color:var(--ink)}.stack-card p{margin:0 0 12px;color:var(--muted)}.mural-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.mural-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;min-height:160px}.mural-item .num{color:var(--lime);font-weight:900}.mural-item h3{color:var(--ink);margin:18px 0 8px}.mural-item p{margin:0;color:var(--muted)}.file-list{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}.file-row{display:grid;grid-template-columns:56px 1fr auto;gap:14px;align-items:center;padding:18px;border-bottom:1px solid 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p{max-width:650px;margin:0;color:#B8C7E3}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand img{width:auto;max-height:32px}.footer-brand div{display:grid}.footer-brand b{color:#fff}.footer-brand span{font-size:12px;color:#9FB0D0}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding:28px 0}.footer-grid h2{font-size:14px;color:#fff;margin:0 0 10px}.footer-grid a{display:block;color:#B8C7E3;padding:4px 0}.footer-bottom{font-size:13px;color:#8294B4;border-top:1px solid rgba(214,228,255,.1);padding-top:18px}.page-overlay{position:fixed;inset:0;z-index:1350;background:rgba(11,18,32,.46);opacity:0;pointer-events:none;transition:opacity .2s}.page-overlay.is-visible{opacity:1;pointer-events:auto}.directory-panel{position:fixed;inset:0;z-index:1500;background:var(--bg);transform:translateY(-103%);visibility:hidden;pointer-events:none;transition:transform .28s ease,visibility 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span{display:block;margin-top:3px;color:var(--soft);font-size:13px}.search-panel{position:fixed;z-index:1480;left:50%;top:104px;width:min(720px,calc(100% - 32px));transform:translate(-50%,-28px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-panel.is-open{transform:translate(-50%,0);opacity:1;visibility:visible;pointer-events:auto}.search-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head h2{margin:0;color:var(--ink);font-size:20px}.search-box{display:block;margin-top:18px}.search-box input{width:100%;height:50px;border:1px solid rgba(37,99,235,.2);background:var(--bg);border-radius:999px;padding:0 18px;color:var(--muted)}.search-card p{color:var(--soft);font-size:14px}.preset-links{display:flex;flex-wrap:wrap;gap:8px}.preset-links a{display:inline-flex;align-items:center;min-height:40px;padding:0 13px;background:var(--surface-2);color:var(--blue-dark);border-radius:999px;font-weight:700;font-size:14px}.panel-open{overflow:hidden}.mobile-bottom-nav{display:none}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:820px){:root{--header:92px}.tab-bar{display:none}.command-inner{grid-template-columns:72px 1fr 96px}.app-link{padding:0 14px;font-size:14px}.site-main{padding-top:calc(var(--header) + 24px);padding-bottom:58px}.theme-list,.feature-copy,.card-grid,.mural-grid,.directory-grid,.footer-grid{grid-template-columns:1fr 1fr}.numbered-feature,.phone-layout,.article-layout{grid-template-columns:1fr}.stack-card{grid-template-columns:150px 1fr}.side-card{position:static}.footer-brand-row{display:grid}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:1100;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);box-shadow:0 -8px 24px rgba(11,18,32,.06)}.mobile-bottom-nav a{display:grid;place-items:center;min-height:50px;color:var(--soft);font-size:13px;font-weight:700}.mobile-bottom-nav a.is-current{color:var(--blue)}.directory-panel{z-index:1600}.search-panel{inset:0;left:0;top:0;width:auto;transform:none!important;background:var(--bg);padding:18px;opacity:0}.search-panel.is-open{opacity:1;overflow:auto}.search-card{min-height:calc(100vh - 36px);box-shadow:none}.page-overlay{z-index:1450}}
@media(max-width:620px){.site-shell{width:min(calc(100% - 32px),var(--max))}.cover-copy{padding:24px 20px}.theme-list,.feature-copy,.card-grid,.mural-grid,.footer-grid{grid-template-columns:1fr}.directory-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stack-card{grid-template-columns:1fr}.stack-card img,.stack-card .media-slot{height:190px}.file-row{grid-template-columns:48px 1fr}.file-row>a{grid-column:2}.meter-row{grid-template-columns:60px 1fr}.long-strip article{grid-template-columns:48px 1fr}.long-strip article>a{grid-column:2}.section-block{padding:28px 0}.section-title{display:grid}.footer-grid{gap:10px}.footer-grid section{padding:8px 0;border-top:1px solid rgba(214,228,255,.08)}.directory-grid section{padding:16px}.directory-head{height:68px}.page-hero{padding-top:18px}}