:root{--bg:#F5FAFE;--deep:#E7F2FA;--card:#FFFFFF;--sub:#D7EAF6;--title:#16324A;--text:#2A4156;--muted:#4E6A80;--aux:#6E8899;--blue:#4AA3E0;--light:#6BB8EC;--navy:#1B4A6E;--mist:#EAF5FC;--border:rgba(74,163,224,.16);--strong-border:rgba(74,163,224,.42);--shadow:0 12px 28px rgba(27,74,110,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.modal-open{overflow:hidden}a{color:var(--navy);text-decoration:none}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(74,163,224,.35);outline-offset:2px}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;display:block}.shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;background:#fff;color:var(--navy);padding:10px 14px;border-radius:8px;box-shadow:var(--shadow)}.skip-link:focus{top:8px}
.topline{position:fixed;z-index:80;top:0;left:0;right:0;height:22px;background:var(--navy);color:#fff;font-size:12px}.topline-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.plain-button{border:0;background:transparent;color:#fff;padding:0 4px;min-height:22px}.masthead{position:fixed;z-index:79;top:22px;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid var(--border)}.masthead-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-lockup{justify-self:start;display:flex;align-items:center;min-width:44px;min-height:44px}.brand-logo,.footer-logo{height:28px;width:auto;object-fit:contain;object-position:center}.brand-text,.footer-brand-text{font-size:22px;font-weight:800;letter-spacing:.06em;color:var(--navy)}.drawer-toggle{justify-self:center;min-height:44px;padding:0 18px;border:1px solid var(--strong-border);background:#fff;color:var(--navy);border-radius:12px;font-weight:700}.drawer-toggle:hover{background:var(--mist)}.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:12px;background:linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%);color:#fff;font-size:14px;font-weight:700}.app-link:hover{color:#fff;filter:brightness(1.03)}
.section-tabs{position:fixed;z-index:78;top:82px;left:0;right:0;height:40px;background:var(--mist);border-bottom:1px solid var(--border)}.tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}.tabs-inner a{min-height:34px;display:flex;align-items:center;padding:0 18px;border-radius:10px;color:var(--navy);font-size:13px}.tabs-inner a.is-active{background:var(--blue);color:#fff}.site-main{padding-top:146px;min-height:70vh}.page-hero,.section-block{margin-bottom:24px}.page-hero{padding:30px;border-radius:14px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow)}.eyebrow{font-size:13px;color:var(--blue);font-weight:800;letter-spacing:.08em}h1,h2,h3{margin:0;color:var(--title);line-height:1.3}h1{font-size:24px;margin-top:7px;margin-bottom:12px}h2{font-size:20px;margin-bottom:12px}h3{font-size:16px;margin-bottom:8px}p{margin:0 0 12px}.lead{font-size:16px;color:var(--muted);max-width:820px}.muted{color:var(--muted)}.cover-slot,.media-slot{display:flex;align-items:center;justify-content:center;background:var(--mist);border:1px solid var(--border);border-radius:14px;overflow:hidden}.cover-slot{width:100%;height:260px;margin-bottom:18px}.cover-slot img,.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-slot.small{height:180px}.media-slot.medium{height:200px}.media-slot.app{height:min(360px,60vw)}
.btn-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{min-height:42px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:11px;font-size:14px;font-weight:700}.btn.primary{background:linear-gradient(135deg,#6BB8EC 0%,#4AA3E0 55%,#1B4A6E 100%);color:#fff}.btn.secondary{background:#fff;border:1px solid var(--strong-border);color:var(--navy)}.btn:hover{transform:translateY(-1px)}.grid-3,.grid-2,.grid-4{display:grid;gap:16px}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}.card,.article-card,.note-card,.index-card,.term-card,.shelf-item,.number-item,.timeline-item,.faq-item{background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)}.card,.article-card,.note-card,.index-card,.term-card,.shelf-item,.number-item,.faq-item{padding:20px}.card p:last-child,.article-card p:last-child,.note-card p:last-child,.term-card p:last-child,.faq-item p:last-child{margin-bottom:0}.section-block{padding:26px;border-radius:14px;background:var(--deep);border:1px solid var(--border)}.section-block.white{background:#fff}.section-head{display:flex;justify-content:space-between;align-items:end;gap:14px;margin-bottom:16px}.section-head p{margin:0;color:var(--muted);max-width:700px}
.numbered-list{display:grid;gap:12px}.number-item{display:grid;grid-template-columns:56px 1fr;gap:14px;align-items:start}.number{display:flex;align-items:center;justify-content:center;min-height:48px;border-radius:12px;background:var(--blue);color:#fff;font-size:18px;font-weight:800}.shelf{display:grid;gap:10px}.shelf-item{display:grid;grid-template-columns:130px 1fr auto;gap:18px;align-items:center}.shelf-tag{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 12px;border-radius:10px;background:var(--mist);color:var(--navy);font-weight:700}.timeline{position:relative;display:grid;gap:14px}.timeline:before{content:"";position:absolute;left:17px;top:10px;bottom:10px;width:2px;background:var(--strong-border)}.timeline-item{position:relative;margin-left:42px;padding:18px 20px}.timeline-item:before{content:"";position:absolute;left:-34px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--blue);border:3px solid #fff;box-shadow:0 0 0 1px var(--strong-border)}.status{display:inline-flex;min-height:30px;align-items:center;padding:0 10px;border-radius:999px;background:var(--mist);color:var(--navy);font-size:13px;font-weight:700}.quote-note{border-left:4px solid var(--blue);padding:16px 18px;background:#fff;border-radius:0 12px 12px 0;color:var(--muted)}
.app-layout{display:grid;grid-template-columns:minmax(260px,.8fr) 1.2fr;gap:22px;align-items:center}.icon-row{display:flex;align-items:center;gap:14px;margin-bottom:14px}.icon-slot{width:48px;height:48px;background:var(--mist);border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.icon-slot img{width:48px;height:48px;object-fit:contain}.faq-list{display:grid;gap:12px}.faq-item h2,.faq-item h3{margin-bottom:8px}.prose{max-width:860px}.prose p{margin-bottom:14px}.notice{padding:16px 18px;border-radius:12px;background:var(--mist);border:1px solid var(--strong-border)}
.site-footer{margin-top:42px;padding:34px 0 calc(18px + env(safe-area-inset-bottom));background:var(--navy);color:#E7F2FA;border-top:1px solid rgba(231,242,250,.35);font-size:13px}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:24px}.site-footer a{display:block;color:#E7F2FA;margin:6px 0}.site-footer a:hover{color:#fff}.site-footer h2{font-size:14px;color:#fff;margin-bottom:10px}.footer-brand{display:flex;flex-direction:column;align-items:flex-start}.footer-logo-wrap{min-height:40px;display:flex;align-items:center}.footer-brand strong{font-size:16px;color:#fff}.footer-brand p{max-width:360px;margin-top:12px;color:#E7F2FA}.footer-bottom{padding-top:22px;margin-top:22px;border-top:1px solid rgba(231,242,250,.25)}
.overlay{position:fixed;inset:0;z-index:110;background:rgba(22,50,74,.42);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.publication-drawer{position:fixed;z-index:120;top:0;right:0;width:min(400px,86vw);height:100dvh;background:#fff;transform:translateX(105%);visibility:hidden;pointer-events:none;transition:.25s ease;overflow-y:auto;box-shadow:-16px 0 42px rgba(27,74,110,.18)}.publication-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;min-height:68px;padding:10px 18px;background:#fff;border-bottom:1px solid var(--border)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-close,.search-head button{min-width:52px;min-height:44px;border:1px solid var(--strong-border);background:#fff;color:var(--navy);border-radius:10px}.drawer-groups{padding:10px 18px 28px}.drawer-groups section{padding:14px 0;border-bottom:1px solid var(--border)}.drawer-groups h2{font-size:14px;color:var(--blue);margin-bottom:8px}.drawer-groups a{display:block;padding:10px 0}.drawer-groups a strong{display:block;color:var(--title)}.drawer-groups a span{display:block;color:var(--muted);font-size:13px;line-height:1.5;margin-top:2px}
.search-layer{position:fixed;z-index:121;left:0;right:0;top:82px;visibility:hidden;pointer-events:none;opacity:0;transition:.2s ease}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(760px,calc(100% - 32px));margin:16px auto;padding:20px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow)}.search-head{display:flex;justify-content:space-between;gap:14px;align-items:start}.search-head strong{font-size:18px;color:var(--title)}.search-head p{color:var(--muted)}.search-card label{display:block;margin:14px 0 6px;color:var(--muted)}.search-card input{width:100%;min-height:44px;border:1px solid var(--strong-border);border-radius:10px;padding:0 12px;color:var(--text);background:#fff}.preset-links{display:flex;flex-wrap:wrap;gap:9px;margin-top:14px}.preset-links a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 14px;border-radius:10px;background:var(--mist);color:var(--navy);font-weight:700}.mobile-bottom{display:none}
@media(max-width:820px){.site-main{padding-top:104px;padding-bottom:72px}.section-tabs{display:none}.masthead-inner{grid-template-columns:1fr auto 1fr;gap:8px}.app-link{padding:0 10px}.grid-3,.grid-2,.grid-4,.app-layout,.footer-grid{grid-template-columns:1fr}.page-hero,.section-block{padding:20px}.cover-slot{height:220px}.shelf-item{grid-template-columns:1fr;gap:8px}.number-item{grid-template-columns:46px 1fr}.number{min-height:44px;font-size:16px}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.search-layer{top:0;bottom:0;background:var(--navy);padding:16px;overflow:auto}.search-card{width:100%;min-height:calc(100dvh - 32px);margin:0;background:var(--navy);color:#fff;border-color:rgba(231,242,250,.25)}.search-head strong,.search-head p,.search-card label{color:#fff}.search-head button{background:#fff}.preset-links a{background:#fff;color:var(--navy)}.mobile-bottom{position:fixed;z-index:90;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(5,1fr);background:#fff;border-top:1px solid var(--border)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-width:0;color:var(--navy);font-size:13px}.mobile-bottom a.is-active{background:var(--blue);color:#fff}}
@media(max-width:520px){.shell{width:min(100% - 32px,1120px)}.page-hero,.section-block,.card,.article-card,.note-card,.index-card,.term-card,.shelf-item,.number-item,.faq-item{border-radius:10px}.cover-slot{height:190px}.media-slot.small{height:160px}.media-slot.medium{height:180px}.btn-row{display:grid;grid-template-columns:1fr}.btn{width:100%}}