:root{
  --bg:#F4F1F8;--deep:#E4DEEC;--paper:#FBF8FF;--soft:#EEE8F4;
  --ink:#161418;--text:#2A242C;--muted:#5A5460;--aux:#7A7480;
  --blue:#4A8AB8;--pink:#C46A8A;--green:#6A9A48;--gold:#C4A04A;--purple:#6A4A9A;
  --border:rgba(22,20,24,.12);--strong:rgba(106,74,154,.45);--shadow:0 12px 28px rgba(22,20,24,.08);--max:960px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.7 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-60px;z-index:9999;background:var(--ink);color:var(--paper);padding:10px 14px;border-radius:10px}.skip-link:focus{top:8px}.site-head{position:fixed;inset:0 0 auto;z-index:1000}.jiu-edge{height:20px;background:var(--ink);color:var(--gold);font-size:12px}.top-inner,.brand-row,.fan-nav,.page-shell,.footer-inner{max-width:var(--max);margin:auto}.top-inner{height:20px;display:flex;align-items:center;justify-content:space-between;padding:0 16px}.text-button{border:0;background:none;color:var(--gold);padding:0;cursor:pointer}.color-head{height:54px;background:var(--paper);border-bottom:1px solid rgba(106,74,154,.35)}.brand-row{height:54px;display:flex;align-items:center;justify-content:space-between;padding:0 16px}.brand{display:inline-flex;align-items:center;min-height:44px;font-size:16px;font-weight:800}.brand img,.footer-brand img,.bag-brand img{height:24px;width:auto;object-fit:contain;object-position:center}.brand-actions{display:flex;align-items:center;gap:8px}.app-link,.bag-button,.button,.button-secondary{height:42px;min-width:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border-radius:10px;border:1px solid transparent;white-space:nowrap;font-size:14px}.app-link,.button{background:linear-gradient(135deg,var(--blue) 0%,var(--pink) 50%,var(--purple) 100%);color:var(--paper)}.bag-button{background:var(--paper);border-color:var(--purple);color:var(--ink);cursor:pointer}.fan-nav{height:44px;background:var(--paper);display:flex;align-items:center;justify-content:center;gap:24px;border-bottom:1px solid var(--border)}.fan-item{position:relative;width:72px;height:44px;display:flex;align-items:center;justify-content:center;font-size:13px}.cap{position:absolute;width:72px;height:22px;border:1px solid var(--blue);border-radius:36px 36px 3px 3px;background:var(--paper)}.fan-item>span:last-child{position:relative;z-index:1;line-height:22px;color:var(--muted)}.fan-item.current .cap{background:var(--purple);border-color:var(--purple)}.fan-item.current>span:last-child{color:var(--paper)}
.page-shell{padding:146px 16px 64px;min-height:60vh}.hero{padding:30px 0 28px}.hero h1,.page-hero h1{font-size:24px;line-height:1.3;margin:10px 0;color:var(--ink)}.hero .lead,.page-hero .lead{font-size:16px;color:var(--muted);max-width:760px}.mini-index{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}.mini-index a{position:relative;width:72px;height:28px;display:flex;align-items:center;justify-content:center;font-size:13px}.mini-index .cap{width:72px;height:22px;left:0;top:2px}.mini-index a>span:last-child{position:relative;z-index:1}.button{margin-top:12px}.button-secondary{border-color:var(--purple);background:var(--paper);color:var(--ink)}.button:hover,.button:focus-visible,.app-link:hover,.app-link:focus-visible{filter:brightness(.96)}.button-secondary:hover,.button-secondary:focus-visible,.bag-button:hover,.bag-button:focus-visible{background:var(--soft)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(106,74,154,.35);outline-offset:2px}.section{margin:24px 0;padding:26px;background:var(--paper);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)}.section h2{font-size:20px;margin:0 0 12px;color:var(--ink)}.section h3{font-size:16px;margin:18px 0 6px;color:var(--ink)}.section p{margin:0 0 12px}.media-slot{background:var(--paper);border:1px dashed rgba(106,74,154,.28);min-height:120px;display:flex;align-items:center;justify-content:center;overflow:hidden;border-radius:10px}.media-slot img{display:block;max-width:100%;max-height:100%;width:100%;height:100%;object-fit:contain;object-position:center}
/* 首页：扇切 */
.ring-layout{display:grid;grid-template-columns:1fr 250px;gap:28px;align-items:center}.ring-media{width:230px;height:176px;border-radius:115px 115px 10px 10px;justify-self:center;background:var(--paper);border:1px solid var(--strong)}
/* 首页与玖记：三联窄 */
.scatter{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:start}.scatter .note{padding:18px;border:1px solid var(--border);border-radius:10px;background:var(--soft);min-height:230px}.scatter .note:nth-child(2){margin-top:28px}.scatter .note:nth-child(3){margin-top:56px}.scatter-media{height:150px;border-radius:10px;margin-bottom:14px}.umbrella-pages{display:grid;grid-template-columns:1fr 1fr;gap:0;perspective:900px}.umbrella-page{position:relative;padding:24px 22px 22px;background:var(--paper);border:1px solid var(--border);border-radius:10px}.umbrella-page:first-child{transform:rotateY(2deg);transform-origin:right;border-right:3px solid var(--purple)}.umbrella-page:last-child{transform:rotateY(-2deg);transform-origin:left;border-left:3px solid var(--purple)}.umbrella-page:before{content:"";position:absolute;top:0;left:0;width:100%;height:7px;background:linear-gradient(90deg,var(--blue),var(--pink),var(--purple));opacity:.75}.umbrella-media{height:180px;border-radius:10px;margin:12px 0}.rack-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}.rack-card{padding:22px;border-radius:10px;background:var(--soft);border:1px solid var(--border)}.rack-media{height:190px;border-radius:10px;margin-bottom:14px}.three-periods{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.period{padding:20px;border-radius:10px;background:var(--soft);border:1px solid var(--border)}.period:nth-child(1){border-top:4px solid var(--blue)}.period:nth-child(2){border-top:4px solid var(--pink)}.period:nth-child(3){border-top:4px solid var(--green)}.wide-media{height:220px;border-radius:10px;margin-bottom:16px}.status-list{display:grid;gap:10px}.status-row{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:14px 16px;border-radius:10px;background:var(--soft);border-left:6px solid var(--purple)}.wrap-figure{float:right;width:min(280px,42%);margin:2px 0 12px 24px}.wrap-figure .media-slot{height:300px;border-radius:10px}.app-icon{width:64px;height:64px;margin:10px auto 16px;border-radius:10px}.clearfix:after{content:"";display:block;clear:both}.page-hero{padding:20px 0 10px}.page-hero .eyebrow{font-size:13px;color:var(--purple);font-weight:700}.narrow-columns{columns:3 240px;column-gap:16px}.narrow-columns .card{break-inside:avoid;margin:0 0 16px;padding:20px;background:var(--paper);border:1px solid var(--border);border-radius:10px}.circle-feature{display:grid;grid-template-columns:240px 1fr;gap:24px;align-items:center}.circle-feature .media-slot{width:220px;height:176px;border-radius:110px 110px 10px 10px}.fold-spine{display:grid;grid-template-columns:1fr 1fr;gap:0;perspective:900px}.fold-spine article{padding:26px;background:var(--paper);border:1px solid var(--border);border-radius:10px}.fold-spine article:first-child{transform:rotateY(2deg);transform-origin:right;border-right:4px solid var(--purple)}.fold-spine article:last-child{transform:rotateY(-2deg);transform-origin:left;border-left:4px solid var(--purple)}.single-stack{display:grid;gap:16px}.single-stack article{padding:22px;background:var(--paper);border-left:5px solid var(--blue);border-radius:0 10px 10px 0}.checklist{display:grid;gap:12px}.checklist article{padding:18px 20px 18px 50px;position:relative;background:var(--paper);border:1px solid var(--border);border-radius:10px}.checklist article:before{content:"✓";position:absolute;left:18px;top:18px;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--purple);color:white}.method-grid,.topic-list,.terms{display:grid;gap:16px}.method-grid article,.topic-list article,.terms article{padding:22px;background:var(--paper);border:1px solid var(--border);border-radius:10px}.topic-list article:nth-child(odd){margin-right:9%}.topic-list article:nth-child(even){margin-left:9%}.center-card{max-width:760px;margin:22px auto;padding:30px;background:var(--paper);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)}.banner-slot{height:200px;border-radius:10px;margin:12px 0 24px}.faq-list details{background:var(--paper);border:1px solid var(--border);border-radius:10px;padding:0 20px;margin:12px 0}.faq-list summary{cursor:pointer;font-weight:700;padding:18px 0}.faq-list p{padding:0 0 18px;margin:0}.link-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.link-cards a{padding:20px;background:var(--paper);border:1px solid var(--border);border-radius:10px}.site-footer{background:var(--ink);color:var(--bg);border-top:1px solid var(--gold);font-size:13px}.footer-inner{padding:34px 16px 76px}.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:24px}.footer-brand span{color:var(--gold)}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.footer-groups h2{font-size:13px;color:var(--gold);margin:0 0 8px}.footer-groups a{display:block;color:var(--bg);padding:4px 0}.footer-note{color:#d8d2df;max-width:760px;margin-top:24px}.copyright{color:var(--gold)}.overlay{position:fixed;inset:0;background:rgba(22,20,24,.45);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:1090}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}
/* 玖屏：左侧滑入 */
.bag-panel{position:fixed;top:50%;left:0;transform:translate(-105%,-50%);width:28%;min-width:280px;max-width:390px;max-height:78vh;background:var(--paper);border:1px solid var(--strong);border-radius:0 10px 10px 0;box-shadow:var(--shadow);visibility:hidden;pointer-events:none;transition:.22s;z-index:1100;display:flex;flex-direction:column}.bag-panel.open{visibility:visible;pointer-events:auto;transform:translate(0,-50%)}.bag-head{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;border-bottom:1px solid var(--border)}.bag-brand{display:flex;align-items:center;gap:8px}.close-button{min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:10px;background:var(--paper);cursor:pointer}.bag-scroll{padding:8px 12px 14px;overflow:auto}.bag-group h2{font-size:12px;color:var(--purple);margin:10px 4px 4px}.bag-group a{display:block;padding:7px 8px;border-radius:8px}.bag-group a:hover{background:var(--soft)}.bag-group strong{font-size:14px}.bag-group span{display:block;font-size:12px;color:var(--muted);line-height:1.4}.search-panel{position:fixed;top:74px;left:0;right:0;z-index:1100;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-14px);transition:.2s}.search-panel.open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.search-inner{max-width:680px;margin:auto;background:var(--paper);border:1px solid var(--strong);border-radius:0 0 10px 10px;padding:20px;box-shadow:var(--shadow)}.search-title{display:flex;align-items:center;justify-content:space-between;gap:12px}.search-inner label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}.search-inner input{width:100%;height:44px;border:1px solid var(--border);border-radius:10px;padding:0 16px;background:white}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-links a{padding:8px 14px;background:var(--soft);border-radius:10px}.search-empty{color:var(--muted)}.mobile-bar{display:none}.notice{padding:16px 18px;border-radius:10px;background:var(--soft);border-left:5px solid var(--gold)}
@media(max-width:720px){.fan-nav{display:none}.page-shell{padding:92px 16px 78px}.brand-row{padding:0 12px}.app-link,.bag-button{padding:0 12px}.top-inner{padding:0 12px}.section{padding:20px;border-radius:10px}.ring-layout,.scatter,.rack-pair,.three-periods,.circle-feature,.fold-spine,.link-cards{grid-template-columns:1fr}.scatter .note:nth-child(n){margin-top:0}.umbrella-pages{grid-template-columns:1fr}.status-row{grid-template-columns:1fr;gap:4px}.narrow-columns{columns:1}.wrap-figure{float:none;width:100%;margin:0 0 16px}.wrap-figure .media-slot{height:280px}.footer-groups{grid-template-columns:1fr 1fr}.mobile-bar{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--paper);z-index:1050;border-top:1px solid var(--border)}.mobile-bar a{display:grid;place-items:center;min-height:48px;font-size:13px}.mobile-bar a.current{background:var(--purple);color:var(--paper)}.bag-panel{top:50%;left:50%;width:88%;min-width:0;max-width:none;max-height:78vh;border-radius:10px;transform:translate(-50%,-55%) scale(.98);opacity:0}.bag-panel.open{transform:translate(-50%,-50%) scale(1);opacity:1}.search-panel{top:0;bottom:0;background:var(--ink);padding:80px 16px 16px}.search-inner{height:100%;max-width:none;background:var(--ink);color:var(--gold);border:0;border-radius:0;box-shadow:none}.search-inner input{background:var(--paper);color:var(--ink)}.search-links a{background:#2A2430;color:var(--paper)}.search-title .close-button{color:var(--paper);border-color:#5A5460;background:#2A2430}.footer-inner{padding-bottom:92px}}