:root{
--bg:#E4E8EA;--deep:#C8D0D4;--surface:#F2F5F6;--surface2:#D6DDE0;--title:#1E2A2E;--text:#2E3C42;
--muted:#5A6A70;--soft:#7A8A90;--gray:#5A7A80;--steel:#6A8890;--copper:#B88860;
--line:rgba(30,42,46,.12);--focus:rgba(90,122,128,.48);--shadow:0 12px 28px rgba(30,42,46,.08);--shell:960px}
*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;overflow-x:hidden}
body.no-scroll{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{display:block;max-width:100%}
.shell{width:min(calc(100% - 32px),var(--shell));margin:0 auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:100;background:var(--title);color:var(--surface);padding:8px 12px}.skip-link:focus{top:8px}
.xun-edge{position:fixed;top:0;left:0;right:0;z-index:55;height:20px;background:var(--gray);color:var(--surface);font-size:12px}.xun-edge-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.search-trigger{height:20px;border:0;background:transparent;color:var(--surface);padding:0 6px}
.gray-head{position:fixed;top:20px;left:0;right:0;z-index:54;height:54px;background:var(--surface);border-bottom:1px solid var(--copper)}.gray-head-inner{height:54px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:8px;min-height:44px;color:var(--title);font-size:16px;font-weight:800}.brand-media{height:24px;max-width:130px;display:flex;align-items:center}.brand-logo{height:24px;width:auto;object-fit:contain;object-position:center}.brand-media:not(:empty)+.brand-fallback{display:none}
.head-actions{display:flex;align-items:center;gap:8px}.app-button,.box-button{height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:6px;font-size:14px}.app-button{background:var(--surface);border:1px solid var(--gray);color:var(--title)}.box-button{background:linear-gradient(135deg,var(--gray) 0%,var(--copper) 100%);border:0;color:var(--surface)}
.xun-bars{position:fixed;top:74px;left:0;right:0;z-index:48;height:44px;background:var(--surface);border-bottom:1px solid var(--line)}.xun-bars-inner{height:44px;display:flex;align-items:center;justify-content:center;gap:28px}.xun-bar-item{width:88px;min-height:44px;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;color:var(--muted);font-size:13px}.bar-mark{width:88px;height:4px;background:var(--gray);border-radius:2px}.xun-bar-item.is-current{font-weight:800;color:var(--title)}.xun-bar-item.is-current .bar-mark{height:6px;background:var(--copper)}
.site-main{padding-top:118px;min-height:70vh}.section{padding:44px 0}.section.tight{padding:30px 0}
h1,h2,h3,p{margin-top:0}h1{font-size:24px;line-height:1.3;color:var(--title);margin-bottom:16px}h2{font-size:20px;line-height:1.45;color:var(--title);margin-bottom:14px}h3{font-size:16px;line-height:1.5;color:var(--title);margin-bottom:8px}p{margin-bottom:14px}.lead{font-size:16px;line-height:1.8;color:var(--muted);max-width:800px}.kicker{font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--gray)}
.btns{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.btn{height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:6px;font-size:14px;font-weight:800}.btn-primary{background:linear-gradient(135deg,var(--gray) 0%,var(--copper) 100%);color:var(--surface)}.btn-secondary{background:var(--surface);border:1px solid var(--gray);color:var(--title)}
.home-bars{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:18px}.home-bars span{display:inline-flex;flex-direction:column;gap:4px;font-size:13px;color:var(--title)}.home-bars i{display:block;width:70px;height:4px;border-radius:2px;background:var(--gray)}
.stagger-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:22px;align-items:start}.stagger-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:22px;box-shadow:var(--shadow)}.stagger-card.low{margin-top:38px}
.media-slot{background:var(--surface2);border:1px solid var(--line);border-radius:6px;display:flex;align-items:center;justify-content:center;padding:10px}.media-slot img{max-width:100%;max-height:100%;object-fit:contain;object-position:center}.stagger-media{height:180px;margin-bottom:14px}.stack-media{height:190px;margin-bottom:14px}
.horizontal-records{display:grid;gap:12px}.horizontal-record{display:grid;grid-template-columns:64px 1fr;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:18px 20px;align-items:center}.horizontal-record.has-media{grid-template-columns:64px 1fr 220px}.record-no{width:46px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--gray);color:var(--surface);border-radius:4px;font-weight:800}.horizontal-record .media-slot{height:132px}
.fold-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.fold-card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:24px}.fold-card:after{content:"";position:absolute;right:0;bottom:0;border-style:solid;border-width:0 0 28px 28px;border-color:transparent transparent var(--deep) transparent}
.center-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}.center-card{text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:22px}.center-card .media-slot{height:180px;margin-bottom:14px}
.period-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.period{background:var(--surface);border-top:4px solid var(--copper);border-radius:6px;padding:20px}
.status-list{display:grid;gap:10px}.status{display:grid;grid-template-columns:120px 1fr;gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:16px;align-items:center}.status strong{display:flex;align-items:center;justify-content:center;min-height:36px;background:var(--gray);color:var(--surface);border-radius:4px}
.app-top{max-width:700px;margin:0 auto}.app-media{height:320px;margin-bottom:18px}.app-icon{width:48px;height:48px;object-fit:contain;margin:0 auto 12px}
.article-flow{display:grid;gap:16px}.article-box{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:22px}.article-box ul{margin:0;padding-left:20px}
.method-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.method-card{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:20px}
.faq-list{display:grid;gap:12px}.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:18px 20px}
.brand-panel{background:var(--title);color:var(--bg);border-radius:8px;padding:28px}.brand-panel h2,.brand-panel h3{color:var(--surface)}
.inner-hero{padding:42px 0 24px}.index-layout{display:grid;grid-template-columns:190px 1fr;gap:24px}.index-links{display:grid;align-content:start;gap:8px}.index-links a{background:var(--gray);color:var(--surface);padding:10px 12px;border-radius:4px;font-weight:800}
.single-column{max-width:760px;margin:0 auto;display:grid;gap:16px}.memo-list{display:grid;gap:12px}.memo{background:var(--surface);border-left:5px solid var(--copper);border-radius:0 6px 6px 0;padding:18px 20px}
.topic-list{display:grid;gap:14px}.topic{display:grid;grid-template-columns:140px 1fr;gap:18px;background:var(--surface);border:1px solid var(--line);border-radius:6px;padding:18px}.topic strong{font-size:16px;color:var(--title)}
.center-stack{max-width:760px;margin:0 auto;display:grid;gap:16px}.center-stack .article-box{text-align:center}.terms{display:grid;gap:16px}.about-banner{height:200px;margin-bottom:24px}.about-banner img{width:100%;height:100%;object-fit:contain;object-position:center}
.site-footer{background:var(--title);color:var(--bg);border-top:1px solid var(--copper);padding:34px 0 76px;font-size:13px}.footer-brand{display:flex;align-items:center;gap:8px;margin-bottom:22px}.footer-logo-wrap{height:24px;min-width:32px}.footer-logo{height:24px;width:auto;object-fit:contain}
.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-groups h2{font-size:13px;color:var(--surface);margin-bottom:8px}.footer-groups a{display:block;padding:3px 0}.footer-note{margin:22px 0 8px;color:#d1dadd}.copyright{margin:0;color:#abb8bc}
.overlay{position:fixed;inset:0;z-index:70;background:rgba(30,42,46,.46);opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}
.xun-box{position:fixed;z-index:80;right:22px;bottom:22px;width:260px;max-height:360px;overflow:auto;background:var(--surface);border:1px solid var(--focus);border-radius:8px;box-shadow:var(--shadow);padding:16px;transform:translateY(24px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.xun-box.is-visible{transform:translateY(0);opacity:1;visibility:visible;pointer-events:auto}
.box-head{display:flex;align-items:center;justify-content:space-between;position:sticky;top:-16px;background:var(--surface);padding:3px 0 10px;border-bottom:1px solid var(--line);z-index:2}.box-brand{display:flex;align-items:center;gap:8px}.box-logo{height:24px;width:auto;object-fit:contain}.close-button{min-height:40px;padding:0 12px;border-radius:4px;border:1px solid var(--gray);background:var(--surface);color:var(--title)}
.box-groups{display:grid;gap:12px;padding-top:12px}.box-groups h2{font-size:13px;margin:0 0 6px;color:var(--copper)}.box-groups a{display:grid;grid-template-columns:76px 1fr;gap:8px;padding:6px 0;border-bottom:1px solid var(--line)}.box-groups span{font-size:12px;color:var(--muted)}
.search-layer{position:fixed;z-index:82;top:74px;left:50%;width:min(620px,calc(100% - 32px));transform:translate(-50%,-12px);background:var(--surface);border:1px solid var(--focus);border-radius:8px;box-shadow:var(--shadow);padding:18px;opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.search-layer.is-visible{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}
.search-head{display:flex;justify-content:space-between;gap:16px;align-items:start}.search-head p{font-size:13px;color:var(--muted);margin:2px 0 12px}.search-layer label{display:block;font-size:13px;margin-bottom:5px}.search-layer input{width:100%;height:44px;border:1px solid var(--line);border-radius:4px;background:var(--bg);padding:0 12px;color:var(--title)}
.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.search-presets a{min-height:40px;display:inline-flex;align-items:center;padding:0 12px;border:1px solid var(--gray);border-radius:4px;background:var(--surface)}
.mobile-bottom{display:none}a:hover,button:hover{opacity:.87}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(90,122,128,.28);outline-offset:2px}
@media(max-width:720px){
.xun-bars{display:none}.site-main{padding-top:74px;padding-bottom:60px}.section{padding:32px 0}
.stagger-grid,.fold-grid,.center-cards,.period-row,.method-grid,.index-layout{grid-template-columns:1fr}.stagger-card.low{margin-top:0}
.horizontal-record,.horizontal-record.has-media{grid-template-columns:52px 1fr}.horizontal-record .media-slot{grid-column:1/-1;height:160px}.status{grid-template-columns:1fr}.footer-groups{grid-template-columns:1fr 1fr}.topic{grid-template-columns:1fr}
.xun-box{width:88%;right:6%;bottom:64px}
.search-layer{inset:0;width:100%;height:100dvh;transform:none;border:0;border-radius:0;background:var(--gray);color:var(--surface);padding:22px 16px}.search-layer.is-visible{transform:none}.search-head p{color:#e0e6e8}.search-layer input{background:#48656b;color:var(--surface);border-color:rgba(255,255,255,.22)}.search-presets a{background:#48656b;color:var(--surface);border-color:var(--surface)}.search-layer .close-button{background:transparent;color:var(--surface);border-color:var(--surface)}
.mobile-bottom{position:fixed;z-index:60;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(4,1fr);height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--title);border-top:1px solid var(--copper)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;color:var(--bg);font-size:13px}.mobile-bottom a.is-current{background:var(--gray);color:var(--surface);font-weight:800}.site-footer{padding-bottom:82px}}
@media(max-width:430px){.app-button,.box-button{padding:0 10px}}