:root{--bg:#EEF5F5;--surface:#FAFDFC;--soft:#DCEBEC;--soft2:#E7F1F1;--title:#103C46;--text:#294F57;--muted:#58757B;--light:#7B9094;--teal:#267D83;--green:#4E9E94;--night:#102C33;--gold:#C4A66A;--white:#F8FBFB;--border:rgba(16,60,70,.14);--border2:rgba(38,125,131,.34);--shadow:0 12px 30px rgba(16,44,51,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:120px}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.82;overflow-x:hidden}a{color:inherit;text-decoration:none}a:hover{color:var(--teal)}button,input{font:inherit}.wrap{width:min(1180px,calc(100% - 40px));margin:0 auto}.brand-strip{background:var(--night);color:var(--white)}.strip-inner{height:36px;display:flex;align-items:center;justify-content:space-between;font-size:14px}.strip-actions{display:flex;gap:20px;align-items:center}.text-button{border:0;background:none;color:inherit;padding:6px 0;cursor:pointer}.main-nav-shell{background:var(--white);position:sticky;top:0;z-index:40;border-bottom:1px solid var(--border)}.main-nav{height:66px;display:grid;grid-template-columns:190px 1fr auto;align-items:center;gap:24px}.brand-mark{display:flex;align-items:center}.brand-logo,.footer-logo{height:34px;width:auto;max-width:170px;object-fit:contain}.brand-text{font-size:22px;font-weight:750;color:var(--title)}.primary-nav{display:flex;justify-content:center;gap:30px}.primary-nav a,.topic-nav a{position:relative;font-size:15px}.primary-nav a.is-current:after,.topic-nav a.is-current:after{content:"";position:absolute;left:20%;right:20%;bottom:-9px;height:2px;background:var(--teal)}.nav-actions{display:flex;align-items:center;gap:10px}.menu-button,.iconish{min-height:44px;border:1px solid var(--border2);background:var(--surface);color:var(--title);border-radius:10px;padding:0 14px;cursor:pointer}.mobile-search{display:none}.topic-index{background:var(--soft2);border-bottom:1px solid var(--border)}.topic-nav{height:42px;display:flex;align-items:center;justify-content:center;gap:32px}.topic-nav a.is-current:after{bottom:-8px}.section{padding:72px 0}.section.compact{padding:48px 0}.surface{background:var(--surface)}.soft{background:var(--soft2)}.night{background:var(--night);color:var(--white)}.eyebrow{display:inline-block;color:var(--teal);font-weight:750;font-size:13px;letter-spacing:.08em}.night .eyebrow{color:var(--gold)}h1,h2,h3{color:var(--title);line-height:1.28;margin-top:0}.night h1,.night h2,.night h3{color:var(--white)}h1{font-size:clamp(28px,4vw,34px);margin-bottom:18px}h2{font-size:clamp(22px,3vw,26px);margin-bottom:16px}h3{font-size:18px;margin-bottom:10px}p{margin:0 0 18px}.lead{font-size:18px;max-width:820px}.reading{max-width:800px}.hero-media{background:var(--white);min-height:160px;display:flex;align-items:center;justify-content:center;border-bottom:1px solid var(--border)}.hero-media img,.content-img{width:100%;height:auto;max-width:100%;object-fit:contain;object-position:center}.hero-media img{max-height:320px}.hero-copy{padding-top:38px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:10px;border:1px solid var(--teal);color:var(--teal);background:transparent}.btn.primary{background:var(--teal);color:white}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:40px}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow)}.plain-card{border-top:2px solid var(--gold);padding:22px 0}.split{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}.split.reverse{grid-template-columns:.85fr 1.15fr}.media-box{background:var(--white);border:1px solid var(--border);border-radius:16px;padding:18px;display:flex;align-items:center;justify-content:center;min-height:220px}.media-box img{max-height:320px}.index-list{display:grid;gap:12px}.index-item{padding:14px 0;border-bottom:1px solid var(--border)}.index-item b{display:block;color:var(--title)}.three-columns{column-count:3;column-gap:34px}.flow{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.flow article{border-left:3px solid var(--gold);padding:18px 20px;background:var(--surface)}.num{font-size:13px;color:var(--gold);font-weight:800;letter-spacing:.12em}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:46px;align-items:start}.side-index{position:sticky;top:124px;border-left:1px solid var(--border);padding-left:22px}.side-index a{display:block;padding:8px 0;color:var(--muted)}.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.status{background:var(--surface);border-radius:12px;border:1px solid var(--border);padding:22px}.topic-links{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.topic-links a{min-height:100px;padding:20px;border:1px solid var(--border);background:var(--surface);border-radius:12px}.long-intro{max-width:920px}.app-layout{display:grid;grid-template-columns:.4fr .6fr;gap:50px;align-items:center}.app-image{display:flex;justify-content:center}.app-image img{max-height:400px;width:auto;max-width:100%;object-fit:contain}.app-icon{width:64px!important;height:64px!important;object-fit:contain}.mini-rule{height:2px;width:44px;background:var(--gold);margin:0 0 20px}.page-hero{padding:58px 0 42px;background:linear-gradient(180deg,var(--surface),var(--bg))}.page-hero-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.72fr);gap:44px;align-items:center}.page-hero .media-box{min-height:210px}.prose-section{padding:62px 0}.prose-section .reading h2{margin-top:32px}.steps{counter-reset:step}.step{display:grid;grid-template-columns:54px 1fr;gap:18px;padding:26px 0;border-bottom:1px solid var(--border)}.step:before{counter-increment:step;content:counter(step,decimal-leading-zero);color:var(--gold);font-weight:800}.terms article{padding:24px 0;border-bottom:1px solid var(--border)}details{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:0 20px;margin:12px 0}summary{cursor:pointer;padding:18px 0;font-weight:700;color:var(--title)}details p{padding-bottom:18px}.site-footer{background:var(--night);color:#d7e5e6;padding:56px 0 86px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:30px}.site-footer h2{color:var(--white);font-size:15px}.site-footer a{display:block;color:#d7e5e6;font-size:14px;padding:4px 0}.footer-logo-row{display:flex!important;align-items:center;gap:12px}.footer-logo-row strong,.footer-logo-row small{display:block}.footer-logo-row small{color:#91aaae;font-size:11px;letter-spacing:.08em}.footer-brand p{font-size:14px;color:#aac0c3}.footer-note{border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:24px;font-size:13px;color:#9db4b8}.overlay{position:fixed;inset:0;background:rgba(16,44,51,.32);z-index:70;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.overlay.open{visibility:visible;opacity:1;pointer-events:auto}.menu-panel,.search-panel{position:fixed;left:0;right:0;top:102px;z-index:80;visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-8px);transition:.2s}.menu-panel.open,.search-panel.open{visibility:visible;opacity:1;pointer-events:auto;transform:none}.menu-panel{background:var(--white);max-height:70vh;overflow:auto;border-top:1px solid var(--border);box-shadow:var(--shadow)}.panel-inner{padding:22px 0 30px}.panel-head{display:flex;align-items:center;justify-content:space-between;gap:20px}.panel-head h2{margin:0}.panel-head button{border:1px solid var(--border);background:var(--surface);border-radius:8px;min-height:40px;padding:0 14px;cursor:pointer}.menu-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:20px}.menu-groups h3{font-size:14px;color:var(--teal)}.menu-groups a{display:block;padding:9px 0}.menu-groups b,.menu-groups span{display:block}.menu-groups span{font-size:12px;line-height:1.5;color:var(--muted);margin-top:2px}.search-panel{display:flex;justify-content:center;padding:0 20px}.search-card{width:min(760px,100%);background:var(--white);border-radius:0 0 16px 16px;padding:26px;box-shadow:var(--shadow)}.search-look{display:block;margin-top:22px;color:var(--muted)}.search-look input{display:block;width:100%;min-height:48px;margin-top:8px;border:1px solid var(--border2);border-radius:10px;padding:0 14px;background:var(--surface)}.quick-links{display:flex;flex-wrap:wrap;gap:10px}.quick-links a{border:1px solid var(--border);border-radius:9px;padding:7px 11px}.layer-open{overflow:hidden}.mobile-bottom{display:none}.link-arrow{font-weight:700;color:var(--teal)}.kicker{color:var(--gold);font-weight:700}.notice{padding:18px 20px;border-left:3px solid var(--teal);background:var(--soft2);border-radius:0 10px 10px 0}
@media(max-width:900px){.primary-nav{display:none}.main-nav{grid-template-columns:1fr auto;height:60px}.nav-actions{justify-self:end}.mobile-search{display:inline-flex}.brand-strip{display:none}.topic-index{display:none}.menu-panel,.search-panel{top:60px}.menu-groups{grid-template-columns:repeat(2,1fr)}.grid-4{grid-template-columns:repeat(2,1fr)}.split,.split.reverse,.page-hero-inner,.app-layout,.article-shell{grid-template-columns:1fr}.side-index{position:static;border-left:0;border-top:1px solid var(--border);padding-left:0;padding-top:18px}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-brand{grid-column:1/-1}.status-grid{grid-template-columns:repeat(2,1fr)}.topic-links{grid-template-columns:repeat(2,1fr)}.three-columns{column-count:2}}
@media(max-width:640px){body{padding-bottom:58px}.wrap{width:min(100% - 32px,1180px)}.section{padding:50px 0}.page-hero{padding:42px 0 28px}h1{font-size:28px}h2{font-size:23px}.main-nav{gap:10px}.brand-logo{max-width:132px;height:31px}.menu-button,.iconish{padding:0 10px;min-width:44px}.grid-4,.grid-3,.grid-2,.flow,.status-grid,.topic-links{grid-template-columns:1fr}.menu-groups{grid-template-columns:1fr 1fr;gap:20px}.menu-panel{max-height:76vh}.search-card{padding:20px}.split,.split.reverse{gap:24px}.hero-media img{max-height:250px}.media-box{min-height:170px}.media-box img{max-height:240px}.app-image img{max-width:85%}.footer-grid{grid-template-columns:1fr 1fr;gap:22px}.footer-brand{grid-column:1/-1}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);left:0;right:0;bottom:0;z-index:55;background:var(--white);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{height:52px;display:flex;align-items:center;justify-content:center;font-size:13px;position:relative}.mobile-bottom a.is-current{color:var(--teal)}.mobile-bottom a.is-current:before{content:"";position:absolute;top:0;width:24px;height:2px;background:var(--teal)}.site-footer{padding-bottom:84px}.three-columns{column-count:1}.hero-actions .btn{flex:1 1 180px}.page-hero-inner{gap:24px}}