:root{--bg:#2B2C30;--deep:#1A1B1E;--panel:#34363C;--panel2:#3E4046;--title:#F2F2F4;--text:#D8D8DC;--muted:#A8A8B0;--soft:#888890;--gold:#D4B06A;--blue:#7A92B0;--border:rgba(242,242,244,.12);--focus:rgba(212,176,106,.48);--shadow:0 12px 28px rgba(0,0,0,.28)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.shell{width:min(960px,calc(100% - 32px));margin:0 auto}.top-strip{position:fixed;z-index:70;top:0;left:0;right:0;height:20px;background:var(--deep);color:var(--title);font-size:12px}.strip-inner{height:20px;display:flex;align-items:center;justify-content:space-between}.text-btn,.menu-btn,.close-btn{border:0;background:none;color:inherit;cursor:pointer}.text-btn{min-width:44px;height:20px;padding:0;text-align:right}.site-head{position:fixed;z-index:69;top:20px;left:0;right:0;height:54px;background:var(--panel);border-bottom:1px solid var(--focus)}.head-inner{height:54px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;min-height:44px;font-size:16px;font-weight:700}.logo-slot{display:inline-flex;align-items:center}.logo-slot img{display:block;height:24px;max-width:160px;object-fit:contain;object-position:center}.logo-slot img+.brand-fallback{display:none}.brand-fallback{display:inline-block}.brand 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var(--gold);color:var(--gold)}.page-main{padding-top:144px;padding-bottom:54px;min-height:70vh}.hero,.section{margin:0 auto 24px}.hero{padding:28px;background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)}h1,h2,h3{color:var(--title);margin-top:0}h1{font-size:24px;line-height:1.3;margin-bottom:12px}h2{font-size:20px;margin-bottom:12px}h3{font-size:16px;margin-bottom:8px}p{margin:0 0 14px}.lead{font-size:17px;color:var(--title)}.muted{color:var(--muted)}.eyebrow{font-size:12px;color:var(--gold);letter-spacing:.08em;text-transform:uppercase}.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{height:42px;min-width:112px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;border-radius:7px;font-size:14px;border:1px solid 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img{width:100%;height:100%;object-fit:contain;object-position:center}.vertical-split{display:grid;grid-template-columns:minmax(180px,280px) 1fr;gap:22px;align-items:stretch}.vertical-split .media-slot{height:200px}.list-rows{display:grid;gap:12px}.list-row{display:grid;grid-template-columns:116px 1fr;gap:14px;padding:14px 0;border-top:1px solid var(--border)}.list-row:first-child{border-top:0}.list-row .media-slot{height:90px}.grid-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.card{background:var(--panel2);border:1px solid var(--border);border-radius:8px;padding:18px}.card .media-slot{height:150px;margin-bottom:12px}.rack-head .media-slot{height:180px;margin-bottom:14px}.periods{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.period{padding:16px;border-left:3px solid var(--gold);background:var(--panel2);border-radius:6px}.status-list{display:grid;gap:10px}.status-item{display:flex;gap:12px;align-items:flex-start;padding:14px;background:var(--panel2);border-radius:7px}.status-badge{flex:0 0 auto;padding:3px 8px;border-radius:999px;background:var(--deep);color:var(--gold);font-size:12px}.app-layout{display:grid;grid-template-columns:minmax(180px,300px) 1fr;gap:24px;align-items:center}.app-layout .media-slot{height:320px}.app-icons{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:8px}.app-icons .small-icon{width:48px;height:48px;object-fit:contain}.method-list,.topic-list,.memo-list,.terms{display:grid;gap:12px}.method,.topic,.memo,.term{padding:16px;background:var(--panel2);border-left:3px solid var(--blue);border-radius:6px}.center-cards{display:grid;gap:16px;max-width:720px;margin:0 auto}.center-card{text-align:center;padding:22px;background:var(--panel2);border:1px solid var(--border);border-radius:9px}.faq-list 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a:focus-visible{color:var(--title);outline:none}.footer-note{margin-top:22px;color:var(--muted);max-width:800px}.copyright{color:var(--soft)}.overlay{position:fixed;z-index:80;inset:0;background:rgba(0,0,0,.48);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.show{opacity:1;visibility:visible;pointer-events:auto}.side-menu{position:fixed;z-index:90;left:16px;bottom:64px;width:280px;max-height:400px;background:var(--panel);border:1px solid var(--focus);border-radius:10px;box-shadow:var(--shadow);transform:translateY(24px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s;overflow:hidden}.side-menu.open{transform:none;opacity:1;visibility:visible;pointer-events:auto}.menu-top{height:54px;padding:0 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.mini-brand{display:flex;align-items:center;gap:8px}.close-btn{min-width:44px;min-height:44px}.menu-scroll{max-height:346px;overflow:auto;padding:10px 14px}.menu-group{margin-bottom:14px}.menu-group h3{font-size:12px;color:var(--gold);margin-bottom:5px}.menu-group a{display:block;padding:8px;border-radius:6px}.menu-group a:hover,.menu-group a:focus-visible{background:var(--panel2);outline:none}.menu-group b{display:block;color:var(--title);font-size:13px}.menu-group span{display:block;color:var(--muted);font-size:12px}.search-panel{position:fixed;z-index:91;left:0;right:0;top:74px;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.search-panel.open{opacity:1;visibility:visible;pointer-events:auto}.search-card{width:min(620px,calc(100% - 32px));margin:0 auto;background:var(--panel);border:1px solid var(--focus);box-shadow:var(--shadow);padding:18px;border-radius:0 0 10px 10px}.search-head{display:flex;align-items:center;justify-content:space-between}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{min-height:44px;padding:0 14px;display:inline-flex;align-items:center;background:var(--deep);border:1px solid var(--border);border-radius:6px}.search-presets a:hover,.search-presets a:focus-visible{border-color:var(--gold);outline:none}.mobile-bottom{display:none}.locked{overflow:hidden}.page-title-box{margin-bottom:20px}.page-title-box p{max-width:760px}.single-col{max-width:780px;margin:0 auto}.split-left-img{display:grid;grid-template-columns:300px 1fr;gap:22px;align-items:start}.split-left-img .media-slot{height:280px}.grid-feature{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.timeline{display:grid;gap:0}.timeline-item{position:relative;padding:0 0 18px 26px;border-left:2px solid var(--gold)}.timeline-item:before{content:"";position:absolute;left:-6px;top:5px;width:10px;height:10px;border-radius:50%;background:var(--gold)}
@media(max-width:760px){.grid-nav{display:none}.page-main{padding-top:98px;padding-bottom:76px}.hero,.section{padding:20px}.vertical-split,.app-layout,.split-left-img{grid-template-columns:1fr}.vertical-split .media-slot{height:190px}.app-layout .media-slot{height:300px}.grid-cards,.grid-feature,.periods{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,1fr)}.mobile-bottom{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(4,1fr);background:var(--deep);border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px}.mobile-bottom a.active{background:var(--gold);color:var(--deep);font-weight:700}.site-footer{padding-bottom:90px}.side-menu{left:6%;width:88%;bottom:60px}.search-panel{top:0;bottom:0;background:var(--deep);padding-top:90px}.search-card{background:var(--deep);border:0;width:100%;border-radius:0;box-shadow:none}.home-index{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.shell{width:calc(100% - 32px)}.head-link,.menu-btn{padding:0 8px}.footer-groups{grid-template-columns:1fr}.list-row{grid-template-columns:1fr}.list-row .media-slot{height:160px}.hero{padding:18px}.home-index{grid-template-columns:1fr 1fr}}