:root{color-scheme:dark;--bg:#0C100E;--deep:#080A09;--card:#141A16;--card2:#1A2420;--title:#E8F6EE;--text:#CDE3D6;--muted:#8FB3A0;--soft:#6E8F7E;--green:#2A9D5C;--bright:#3CB371;--deepgreen:#146B3A;--sand:#EFE6D2;--line:rgba(42,157,92,.18);--line2:rgba(42,157,92,.45);--shadow:0 12px 28px rgba(8,10,9,.35);--radius:12px;--max:1120px}
*{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,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}body.is-locked{overflow:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,a{touch-action:manipulation}button{font:inherit}.skip-link{position:fixed;left:12px;top:-60px;z-index:1000;background:var(--sand);color:#08110C;padding:10px 14px;border-radius:8px}.skip-link:focus{top:10px}.topline{position:fixed;left:0;right:0;top:0;height:22px;background:#050706;border-bottom:1px solid var(--line);z-index:120}.topline-inner,.railbar-inner,.layer-tabs-inner,.site-main,.footer-inner{width:min(var(--max),calc(100% - 32px));margin:0 auto}.topline-inner{height:22px;display:flex;align-items:center;justify-content:space-between;color:var(--bright);font-size:12px}.plain-button{border:0;background:none;color:var(--bright);padding:0 4px;min-height:22px;cursor:pointer}.railbar{position:fixed;left:0;right:0;top:22px;height:60px;background:var(--deep);border-bottom:1px solid var(--line2);z-index:119}.railbar-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.rail-logo{justify-self:start;display:flex;align-items:center;min-height:44px;color:var(--title);font-weight:800;font-size:16px}.rail-logo img{height:28px;width:auto;object-fit:contain}.drawer-open{justify-self:center;min-width:78px;height:40px;border:1px solid var(--line2);border-radius:10px;background:#101612;color:var(--text);cursor:pointer}.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 16px;border-radius:10px;background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C;font-weight:800;white-space:nowrap}.layer-tabs{position:fixed;left:0;right:0;top:82px;height:40px;background:#0D2B1C;border-bottom:1px solid var(--line2);z-index:118}.layer-tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}.layer-tabs a{display:inline-flex;align-items:center;justify-content:center;min-width:104px;height:32px;border-radius:8px;color:var(--text);font-size:13px}.layer-tabs a.is-current{background:var(--green);color:#08110C;font-weight:800}.site-main{padding-top:154px;padding-bottom:70px;min-height:70vh}.page-hero{padding:26px 0 18px}.eyebrow{margin:0 0 8px;color:var(--bright);font-size:12px;letter-spacing:.08em}.page-hero h1{margin:0;color:var(--title);font-size:24px;line-height:1.3}.lead{max-width:820px;margin:12px 0 0;color:var(--muted)}.hero-actions,.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border-radius:10px;font-size:14px;font-weight:800;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C}.btn-secondary{background:#101612;border:1px solid var(--line2);color:var(--text)}.btn:hover,.railbar a:hover,.layer-tabs a:hover,.footer-grid a:hover,.drawer-groups a:hover,.mobile-bottom a:hover{filter:brightness(1.08)}a:focus-visible,button:focus-visible{outline:2px solid var(--sand);outline-offset:3px}.section{padding:24px 0;border-top:1px solid var(--line)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:14px}.section h2{margin:0;color:var(--title);font-size:20px}.section h3{margin:0 0 8px;color:var(--title);font-size:16px}.section p{margin:0 0 12px}.muted{color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card,.info-card,.article-card,.faq-card,.status-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.card,.info-card,.article-card,.faq-card{padding:16px}.card p:last-child,.article-card p:last-child{margin-bottom:0}.media-slot{display:flex;align-items:center;justify-content:center;width:100%;height:180px;background:var(--deep);border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:14px}.media-slot.tall{height:360px}.media-slot.banner{height:260px}.media-slot.medium{height:200px}.media-image{width:100%;height:100%;object-fit:contain;object-position:center}.cover-copy{text-align:center;padding:18px 0 6px}.cover-copy h1{font-size:24px;line-height:1.3;margin:0 0 12px;color:var(--title)}.cover-copy .brandline{color:var(--bright);font-weight:700;margin-bottom:8px}.split-note{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}.number-list{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0}.number-list span,.tag-list span{display:block;background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:10px;color:var(--text)}.number-list b{color:var(--bright);margin-right:6px}.lesson-list,.column-list,.link-list{display:grid;gap:10px}.lesson-list article,.column-list article{padding:14px 0;border-bottom:1px solid var(--line)}.lesson-list article:last-child,.column-list article:last-child{border-bottom:0}.timeline{position:relative;padding-left:22px}.timeline:before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line2)}.timeline article{position:relative;margin-bottom:16px;padding:14px 16px;background:var(--card);border:1px solid var(--line);border-radius:12px}.timeline article:before{content:"";position:absolute;left:-22px;top:20px;width:12px;height:12px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px #0C100E}.status{display:inline-flex;align-items:center;min-height:28px;padding:0 9px;border-radius:999px;background:var(--green);color:#08110C;font-size:12px;font-weight:800}.prose{max-width:900px}.prose h2{margin-top:26px}.prose h3{margin-top:20px}.prose p,.prose li{color:var(--text)}.prose ul{padding-left:1.2em}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}.data-table{width:100%;border-collapse:collapse;min-width:680px;background:var(--card)}.data-table th,.data-table td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.data-table th{color:var(--sand);font-weight:700}.data-table tr:last-child td{border-bottom:0}.notice{padding:14px 16px;border-left:3px solid var(--bright);background:var(--card2);border-radius:0 10px 10px 0}.site-footer{background:#050706;border-top:1px solid var(--line2);color:var(--text);font-size:13px}.footer-inner{padding:30px 0 calc(78px + env(safe-area-inset-bottom))}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}.footer-brand img{height:28px;width:auto;object-fit:contain}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{color:var(--title);font-size:16px}.footer-brand span{color:var(--muted)}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid h2{font-size:13px;color:var(--sand);margin:0 0 8px}.footer-grid a{display:block;color:var(--muted);padding:4px 0}.footer-note{max-width:860px;margin:24px 0 10px;color:var(--muted)}.copyright{margin:0;color:var(--soft)}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.58);z-index:200;opacity:0;pointer-events:none;transition:opacity .2s}.overlay.is-open{opacity:1;pointer-events:auto}.drawer-panel{position:fixed;left:0;top:0;bottom:0;width:400px;max-width:86vw;background:#090D0B;border-right:1px solid var(--line2);z-index:210;transform:translateX(-101%);visibility:hidden;pointer-events:none;transition:transform .22s ease,visibility .22s;overflow-y:auto}.drawer-panel.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:#090D0B;border-bottom:1px solid var(--line);z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand img{height:28px;width:auto;object-fit:contain}.drawer-brand div{display:flex;flex-direction:column}.drawer-brand span{font-size:12px;color:var(--muted)}.drawer-close,.search-close{height:40px;padding:0 14px;border:1px solid var(--line2);border-radius:10px;background:#111713;color:var(--text);cursor:pointer}.drawer-groups{padding:8px 16px 26px}.drawer-groups section{padding:12px 0;border-bottom:1px solid var(--line)}.drawer-groups h2{font-size:13px;color:var(--bright);margin:0 0 8px}.drawer-groups a{display:block;padding:10px;border-radius:10px}.drawer-groups a strong{display:block;color:var(--title)}.drawer-groups a span{display:block;margin-top:2px;color:var(--muted);font-size:12px;line-height:1.55}.search-panel{position:fixed;left:0;right:0;top:82px;z-index:205;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(760px,calc(100% - 32px));margin:12px auto 0;padding:16px;background:#090D0B;border:1px solid var(--line2);border-radius:12px;box-shadow:var(--shadow)}.search-head{display:flex;justify-content:space-between;align-items:center;gap:12px}.search-head strong{color:var(--title);font-size:16px}.search-card p{color:var(--muted)}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{display:inline-flex;align-items:center;min-height:40px;padding:0 12px;border-radius:9px;background:var(--card2);border:1px solid var(--line);color:var(--text)}.mobile-bottom{display:none}.quote-box{padding:18px;background:var(--card2);border:1px solid var(--line);border-radius:12px}.mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.index-app{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:18px;align-items:center}.icon-inline{display:flex;align-items:center;gap:12px;margin-bottom:12px}.icon-inline img{width:48px;height:48px;object-fit:contain;border-radius:10px}.faq-list{display:grid;gap:12px}.faq-card h2{font-size:16px;margin:0 0 8px;color:var(--title)}.faq-card p{margin:0;color:var(--text)}
@media (max-width:800px){.layer-tabs{display:none}.site-main{padding-top:110px;padding-bottom:72px}.card-grid{grid-template-columns:1fr}.split-note,.index-app{grid-template-columns:1fr}.number-list{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:115;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(--line2)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--muted)}.mobile-bottom a.is-current{background:var(--green);color:#08110C;font-weight:800}.search-panel{top:0;bottom:0;background:#070A08}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;padding:18px 16px}.footer-inner{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.media-slot.banner{height:260px}.media-slot.tall{height:320px}}
@media (max-width:520px){.topline-inner,.railbar-inner,.site-main,.footer-inner{width:calc(100% - 32px)}.railbar-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px}.rail-logo{min-width:0;overflow:hidden}.rail-logo img{max-width:92px}.drawer-open{min-width:66px;padding:0 12px}.app-link{padding:0 12px}.page-hero{padding-top:18px}.mini-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.number-list{grid-template-columns:1fr 1fr}.section-head{align-items:start;flex-direction:column}.media-slot{height:170px}}