*{box-sizing:border-box}html{scroll-behavior:smooth;background:#0C100E}body{margin:0;background:#0C100E;color:#CDE3D6;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:#EFE6D2;color:#08110C;padding:8px 12px;border-radius:8px}.skip-link:focus{top:8px}.top-rail{position:fixed;z-index:90;top:0;left:0;right:0;height:22px;background:#050706;border-bottom:1px solid rgba(42,157,92,.18)}.top-rail__inner{max-width:1120px;height:22px;margin:0 auto;padding:0 16px;display:flex;align-items:center;justify-content:space-between;color:#3CB371;font-size:12px}.top-search{min-width:44px;height:22px;border:0;background:transparent;color:#3CB371;padding:0 6px}.site-header{position:fixed;z-index:85;top:22px;left:0;right:0}.main-rail{height:60px;background:#080A09;border-bottom:1px solid rgba(42,157,92,.45);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;padding:0 max(16px,calc((100vw - 1120px)/2 + 16px))}.brand-mark{justify-self:start;min-width:44px;min-height:44px;display:flex;align-items:center;font-size:16px;font-weight:800;color:#E8F6EE}.brand-logo{display:block;max-width:160px;height:28px;object-fit:contain;object-position:left center}.drawer-trigger,.app-link{min-height:44px;padding:0 16px;border-radius:10px;font-size:14px;display:inline-flex;align-items:center;justify-content:center}.drawer-trigger{justify-self:center;border:1px solid rgba(42,157,92,.45);background:#141A16;color:#CDE3D6}.app-link{justify-self:end;background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C;font-weight:800}.sub-tabs{height:40px;background:#146B3A;border-bottom:1px solid rgba(42,157,92,.45);display:flex;align-items:center;justify-content:center;gap:8px;padding:4px 16px}.sub-tabs a{min-height:32px;padding:4px 16px;border-radius:8px;display:flex;align-items:center;font-size:13px;color:#E8F6EE}.sub-tabs a.is-current{background:#2A9D5C;color:#08110C;font-weight:800}.site-main{max-width:1120px;margin:0 auto;padding:146px 16px 56px}.page-hero{margin:0 0 22px}.page-hero h1{font-size:24px;line-height:1.3;color:#E8F6EE;margin:0 0 10px}.page-hero p{max-width:850px;margin:0;color:#8FB3A0}.eyebrow{margin:0 0 6px;color:#3CB371;font-size:12px;letter-spacing:.08em;text-transform:uppercase}.hero-copy{padding:18px 0 8px}.hero-copy h1{font-size:24px;line-height:1.3;margin:0 0 10px;color:#E8F6EE}.hero-copy p{margin:0;max-width:820px}.brand-kicker{font-size:13px;color:#3CB371;margin-bottom:4px}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.btn{min-height:42px;padding:8px 16px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;font-size:14px;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C;font-weight:800}.btn-secondary{background:#080A09;border:1px solid rgba(42,157,92,.45);color:#CDE3D6}.btn:hover,.drawer-trigger:hover,.app-link:hover,.sub-tabs a:hover,.footer-grid a:hover,.drawer a:hover,.mobile-dock a:hover{filter:brightness(1.08)}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid #EFE6D2;outline-offset:3px}.media-slot{width:100%;height:220px;background:#080A09;border:1px solid rgba(42,157,92,.18);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.banner-slot{height:260px}.tile-slot{height:180px}.feature-slot{height:200px}.app-slot{height:360px}.app-icon{display:block;width:48px;height:48px;object-fit:contain;object-position:center;margin:0 0 12px}.content-section{margin:20px 0;padding:20px;background:#141A16;border:1px solid rgba(42,157,92,.18);border-radius:12px;box-shadow:0 12px 28px rgba(8,10,9,.35)}.content-section h2{font-size:20px;line-height:1.35;margin:0 0 10px;color:#E8F6EE}.content-section h3{font-size:16px;line-height:1.45;margin:18px 0 6px;color:#E8F6EE}.content-section p{margin:8px 0;color:#CDE3D6}.content-section ul,.content-section ol{padding-left:20px;margin:10px 0}.content-section li{margin:6px 0}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:20px 0}.info-card{background:#141A16;border:1px solid rgba(42,157,92,.18);border-radius:12px;padding:16px;min-width:0}.info-card h2,.info-card h3{margin:12px 0 6px;color:#E8F6EE}.info-card h2{font-size:20px}.info-card h3{font-size:16px}.info-card p{margin:0;color:#CDE3D6}.two-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.lesson-list,.index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;padding:0;list-style:none}.lesson-list li,.index-list a{padding:12px 14px;background:#1A2420;border:1px solid rgba(42,157,92,.18);border-radius:10px}.number-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:14px 0}.number-list div{padding:12px;background:#1A2420;border-radius:10px;border:1px solid rgba(42,157,92,.18)}.number-list strong{display:block;color:#3CB371;font-size:12px;margin-bottom:4px}.timeline{position:relative;margin:12px 0 0;padding-left:26px}.timeline:before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:1px;background:rgba(42,157,92,.45)}.timeline article{position:relative;padding:0 0 18px 12px}.timeline article:before{content:"";position:absolute;left:-23px;top:8px;width:9px;height:9px;border-radius:50%;background:#3CB371;box-shadow:0 0 0 4px #141A16}.status{display:inline-flex;align-items:center;min-height:28px;padding:3px 9px;border-radius:999px;background:#1A2420;border:1px solid rgba(42,157,92,.45);color:#CDE3D6;font-size:12px}.callout{border-left:3px solid #3CB371;padding:12px 14px;background:#1A2420;border-radius:0 10px 10px 0;color:#CDE3D6}.faq-list details{background:#141A16;border:1px solid rgba(42,157,92,.18);border-radius:12px;padding:14px 16px;margin:10px 0}.faq-list summary{cursor:pointer;color:#E8F6EE;font-weight:700}.faq-list p{margin:10px 0 0}.site-footer{background:#050706;border-top:1px solid rgba(42,157,92,.45);color:#CDE3D6;font-size:13px;padding:32px 16px 88px}.footer-inner{max-width:1120px;margin:0 auto}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:20px}.footer-brand div{display:flex;flex-direction:column}.footer-brand span{color:#8FB3A0}.footer-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.footer-grid h2{font-size:13px;color:#3CB371;margin:0 0 8px}.footer-grid a{display:block;padding:4px 0;color:#CDE3D6}.footer-note{max-width:900px;color:#8FB3A0;margin:24px 0 8px}.copyright{margin:0;color:#6E8F7E}.drawer{position:fixed;z-index:120;top:0;left:0;bottom:0;width:400px;max-width:86vw;background:#080A09;border-right:1px solid rgba(42,157,92,.45);transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s ease;overflow-y:auto;padding:14px 16px 28px}.drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;position:sticky;top:0;background:#080A09;padding:8px 0 12px;z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand span{display:flex;flex-direction:column}.drawer-brand small{color:#8FB3A0}.icon-button{min-width:44px;min-height:44px;border:1px solid rgba(42,157,92,.45);border-radius:10px;background:#141A16;color:#CDE3D6}.drawer-groups section{margin:18px 0}.drawer-groups h2{font-size:13px;color:#3CB371;margin:0 0 8px}.drawer-groups a{display:block;padding:11px 12px;margin:7px 0;background:#141A16;border:1px solid rgba(42,157,92,.18);border-radius:10px}.drawer-groups strong{display:block;color:#E8F6EE}.drawer-groups span{display:block;color:#8FB3A0;font-size:12px;line-height:1.6}.search-layer{position:fixed;z-index:115;left:0;right:0;top:82px;visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-8px);transition:.2s ease}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:translateY(0)}.search-card{max-width:720px;margin:0 auto;background:#080A09;border:1px solid rgba(42,157,92,.45);border-radius:0 0 14px 14px;padding:16px;box-shadow:0 12px 28px rgba(8,10,9,.35)}.search-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.search-card label{display:block;color:#8FB3A0;margin-bottom:6px}.search-card input{width:100%;min-height:44px;border-radius:10px;border:1px solid rgba(42,157,92,.45);background:#141A16;color:#E8F6EE;padding:0 12px}.search-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:12px}.search-links a{min-height:44px;padding:9px 12px;background:#1A2420;border:1px solid rgba(42,157,92,.18);border-radius:10px;display:flex;align-items:center}.page-overlay{position:fixed;z-index:110;inset:0;background:rgba(5,7,6,.72);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}.page-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.lock-scroll{overflow:hidden}.mobile-dock{display:none}.muted{color:#8FB3A0}.sand{color:#EFE6D2}.center{text-align:center}.section-link{display:inline-flex;margin-top:12px;color:#EFE6D2;text-decoration:underline;text-decoration-color:rgba(42,157,92,.45);text-underline-offset:4px}
@media (max-width:820px){.sub-tabs{display:none}.site-main{padding-top:102px;padding-bottom:78px}.main-rail{padding:0 16px;grid-template-columns:1fr auto 1fr}.brand-mark{min-width:0}.brand-mark .brand-logo{max-width:105px}.drawer-trigger,.app-link{padding:0 10px}.search-layer{top:0;bottom:0;background:#080A09}.search-card{height:100%;max-width:none;border:0;border-radius:0;padding:18px 16px;overflow-y:auto}.search-links{grid-template-columns:1fr 1fr}.card-grid,.two-grid,.footer-grid{grid-template-columns:1fr}.number-list{grid-template-columns:1fr 1fr}.lesson-list,.index-list{grid-template-columns:1fr}.mobile-dock{display:grid;position:fixed;z-index:80;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));grid-template-columns:repeat(5,1fr);background:#080A09;border-top:1px solid rgba(42,157,92,.45);padding-bottom:env(safe-area-inset-bottom)}.mobile-dock a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:12px;color:#CDE3D6}.mobile-dock a.is-current{background:#2A9D5C;color:#08110C;font-weight:800}.site-footer{padding-bottom:92px}.banner-slot{height:220px}.app-slot{height:320px}.top-brand{max-width:66vw;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}}
@media (max-width:480px){.main-rail{gap:6px}.drawer-trigger,.app-link{font-size:13px}.app-link{padding:0 8px}.number-list{grid-template-columns:1fr}.search-links{grid-template-columns:1fr}.content-section{padding:16px;margin:14px 0}.hero-copy{padding-top:14px}.banner-slot{height:190px}.tile-slot{height:160px}.feature-slot{height:180px}}