:root{
  --bg:#0C100E;--deep:#080A09;--panel:#141A16;--panel2:#1A2420;--title:#E8F6EE;--text:#CDE3D6;--muted:#8FB3A0;--soft:#6E8F7E;--green:#2A9D5C;--bright:#3CB371;--darkgreen:#146B3A;--sand:#EFE6D2;--line:rgba(42,157,92,.18);--line-strong:rgba(42,157,92,.45);--shadow:0 12px 28px rgba(8,10,9,.35);--max:1120px
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.modal-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{color:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:300;background:var(--sand);color:var(--deep);padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.shell-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.top-shell{position:fixed;z-index:100;top:0;left:0;right:0}.brand-strip{height:22px;background:#050706;color:var(--bright);font-size:12px;border-bottom:1px solid var(--line)}.brand-strip-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.text-button{border:0;background:none;color:var(--bright);height:22px;padding:0 4px;cursor:pointer}.main-bar{height:60px;background:rgba(8,10,9,.98);border-bottom:1px solid var(--line-strong)}.main-bar-inner{height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-link{justify-self:start;min-height:44px;display:flex;align-items:center}.brand-logo,.drawer-logo,.footer-logo{height:28px;max-width:180px;object-fit:contain;object-position:center}.brand-fallback{font-size:16px;font-weight:800;color:var(--title)}.menu-button{justify-self:center;min-height:44px;min-width:84px;padding:0 16px;border:1px solid var(--line-strong);background:var(--panel);border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:7px;cursor:pointer}.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 17px;border-radius:10px;background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C;font-size:14px;font-weight:800}.section-tabs{height:40px;background:#0E2A1B;border-bottom:1px solid var(--line-strong)}.tabs-inner{height:100%;display:flex;align-items:center;justify-content:center;gap:10px}.tabs-inner a{height:30px;display:flex;align-items:center;padding:0 18px;border-radius:8px;color:var(--text);font-size:13px}.tabs-inner a.is-active{background:var(--green);color:#08110C;font-weight:800}.site-main{padding-top:150px;padding-bottom:64px;min-height:70vh}.content-wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}.page-head{padding:22px 0 18px;border-bottom:1px solid var(--line)}.eyebrow{font-size:12px;color:var(--bright);letter-spacing:.12em;text-transform:uppercase}.page-head h1,.hero-copy h1{font-size:24px;line-height:1.3;color:var(--title);margin:6px 0 10px}.page-head p,.hero-copy p{max-width:830px;margin:0;color:var(--muted)}h2{font-size:20px;line-height:1.4;color:var(--title);margin:0 0 12px}h3{font-size:16px;line-height:1.45;color:var(--title);margin:0 0 8px}p{margin:0 0 12px}.section-block{padding:30px 0;border-bottom:1px solid var(--line)}.section-block:last-child{border-bottom:0}.grid-2,.grid-3,.grid-4{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:var(--shadow)}.card p:last-child{margin-bottom:0}.meta-line{font-size:13px;color:var(--soft)}.tag{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;border:1px solid var(--line-strong);color:var(--muted);font-size:12px}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{min-height:42px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;font-size:14px;font-weight:800}.btn-primary{background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C}.btn-secondary{background:#0A0E0C;color:var(--text);border:1px solid var(--line-strong)}.btn:hover,.app-link:hover,.menu-button:hover{filter:brightness(1.08)}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--sand);outline-offset:3px}.media-slot{width:100%;background:var(--deep);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-banner{height:260px}.slot-card{height:180px}.slot-feature{height:200px}.slot-app{height:340px;max-width:520px}.slot-small{height:150px}.hero-cover{padding-bottom:30px;border-bottom:1px solid var(--line)}.hero-copy{padding-top:18px;max-width:880px}.feature-card .media-slot{margin-bottom:14px}.number-list{display:grid;gap:10px;margin-top:16px}.number-item{display:grid;grid-template-columns:42px 1fr;gap:12px;align-items:start;padding:12px 0;border-top:1px solid var(--line)}.number-item span:first-child{font-weight:900;color:var(--bright)}.lesson-list,.link-list{display:grid;gap:10px}.lesson-list div,.link-list a{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px}.timeline{position:relative;margin-left:8px;padding-left:24px}.timeline:before{content:"";position:absolute;left:4px;top:10px;bottom:10px;width:1px;background:var(--line-strong)}.timeline-item{position:relative;padding:0 0 22px}.timeline-item:before{content:"";position:absolute;left:-24px;top:8px;width:9px;height:9px;border-radius:50%;background:var(--bright);box-shadow:0 0 0 5px var(--bg)}.status{font-size:12px;color:#08110C;background:var(--green);padding:2px 8px;border-radius:999px;font-weight:800}.quote-note{border-left:3px solid var(--bright);padding:12px 16px;background:var(--panel);border-radius:0 10px 10px 0;color:var(--sand)}.definition-list{display:grid;gap:12px}.definition-list div{padding:14px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}.definition-list dt{font-weight:800;color:var(--title);margin-bottom:6px}.definition-list dd{margin:0;color:var(--text)}.faq-list{display:grid;gap:14px}.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}.faq-item h2{font-size:16px}.site-footer{background:#050706;border-top:1px solid var(--line-strong);color:var(--text);font-size:13px;padding:34px 0 calc(34px + env(safe-area-inset-bottom))}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{color:var(--title);font-size:16px}.footer-brand span{color:var(--muted);font-size:12px}.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.footer-grid h2{font-size:13px;color:var(--bright);margin-bottom:8px}.footer-grid a{display:block;color:var(--text);padding:3px 0}.footer-note{margin:24px 0 8px;color:var(--muted);max-width:900px}.copyright{color:var(--soft);margin:0}.site-drawer{position:fixed;z-index:220;left:0;top:0;bottom:0;width:min(400px,86vw);background:var(--deep);border-right:1px solid var(--line-strong);transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .22s ease,visibility .22s ease;box-shadow:var(--shadow);display:flex;flex-direction:column}.site-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:70px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand strong{color:var(--title)}.icon-close{width:44px;height:44px;border:1px solid var(--line-strong);background:var(--panel);border-radius:10px;font-size:26px;line-height:1;cursor:pointer}.drawer-scroll{overflow:auto;padding:16px}.drawer-group{margin-bottom:20px}.drawer-group h2{font-size:13px;color:var(--bright);margin-bottom:8px}.drawer-group a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.drawer-group a strong{display:block;color:var(--title);font-size:14px}.drawer-group a span{display:block;color:var(--muted);font-size:12px;margin-top:2px}.search-layer{position:fixed;z-index:225;top:82px;left:50%;width:min(760px,calc(100% - 32px));transform:translate(-50%,-14px);visibility:hidden;pointer-events:none;opacity:0;transition:.18s ease}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:translate(-50%,0)}.search-card{background:#090D0B;border:1px solid var(--line-strong);border-radius:0 0 14px 14px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head strong{color:var(--title);font-size:18px}.search-card p{color:var(--muted)}.search-label{display:block;font-size:12px;color:var(--soft);margin-bottom:6px}.search-card input{width:100%;height:44px;border:1px solid var(--line-strong);border-radius:10px;background:var(--panel);color:var(--title);padding:0 12px}.search-presets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}.search-presets a{min-height:44px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);background:var(--panel2);border-radius:10px;color:var(--text)}.search-presets a[hidden]{display:none}.search-empty{margin-top:12px!important}.page-overlay{position:fixed;z-index:210;inset:0;background:rgba(0,0,0,.6);opacity:0;visibility:hidden;pointer-events:none;transition:.18s ease}.page-overlay.is-visible{opacity:1;visibility:visible;pointer-events:auto}.mobile-bottom{display:none}.app-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,420px);gap:24px;align-items:start}.app-icon-row{margin-top:12px}.app-mini-icon{width:48px;height:48px;object-fit:contain;object-position:center}.fine-list{margin:0;padding-left:20px}.fine-list li{margin-bottom:8px}.table-like{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}.table-row{display:grid;grid-template-columns:180px 1fr;gap:1px;background:var(--line)}.table-row>*{background:var(--panel);padding:14px}.table-row strong{color:var(--title)}
@media (max-width:800px){.section-tabs{display:none}.site-main{padding-top:106px;padding-bottom:82px}.grid-3,.grid-4{grid-template-columns:1fr}.grid-2{grid-template-columns:1fr}.main-bar-inner{grid-template-columns:1fr auto 1fr;gap:8px}.brand-logo{max-width:120px}.menu-button{min-width:74px;padding:0 10px}.app-link{padding:0 11px;white-space:nowrap}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.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:#070A08;border-top:1px solid var(--line-strong)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--text)}.mobile-bottom a.is-active{background:var(--green);color:#08110C;font-weight:900}.search-layer{z-index:225;top:0;left:0;right:0;bottom:0;width:100%;transform:none;background:#070A08}.search-layer.is-open{transform:none}.search-card{height:100%;border:0;border-radius:0;padding:calc(20px + env(safe-area-inset-top)) 16px 20px;overflow:auto}.search-presets{grid-template-columns:1fr 1fr}.slot-app{height:320px}.app-layout{grid-template-columns:1fr}.table-row{grid-template-columns:1fr}.table-row>*:first-child{padding-bottom:6px}.table-row>*:last-child{padding-top:6px}.brand-strip-inner,.main-bar-inner,.content-wrap,.footer-inner{width:calc(100% - 32px)}.brand-strip{overflow:hidden}.brand-strip span{white-space:nowrap}.hero-cover{padding-top:0}}
@media (max-width:420px){.main-bar-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr)}.brand-link{max-width:100%;overflow:hidden}.brand-fallback{font-size:15px}.menu-button{min-width:68px}.app-link{font-size:12px;padding:0 8px}.search-presets{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.slot-banner{height:230px}}