: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;--border:rgba(42,157,92,.18);--border2:rgba(42,157,92,.45);--shadow:0 12px 28px rgba(8,10,9,.35);--r:12px;--shell:1120px}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--deep)}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%;height:auto}.shell{width:min(calc(100% - 32px),var(--shell));margin:0 auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:200;background:var(--sand);color:#08110C;padding:10px 14px;border-radius:8px}.skip-link:focus{top:10px}
.topline{position:fixed;z-index:90;top:0;left:0;right:0;height:22px;background:#050706;color:var(--bright);border-bottom:1px solid var(--border)}.topline-inner{height:22px;display:flex;align-items:center;justify-content:space-between;font-size:12px;line-height:1}.text-button{min-height:22px;padding:0 6px;border:0;background:transparent;color:var(--bright);cursor:pointer}.mainbar{position:fixed;z-index:89;top:22px;left:0;right:0;height:60px;background:var(--deep);border-bottom:1px solid var(--border2)}.mainbar-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.brand-link,.footer-logo,.drawer-brand{display:inline-flex;align-items:center;gap:9px;min-height:44px}.brand-image img,.footer-logo img,.drawer-brand img{height:28px;width:auto;object-fit:contain;object-position:center}.brand-link .brand-fallback{font-size:16px;font-weight:800;color:var(--title)}.brand-link .brand-image:not(:empty)+.brand-fallback{display:none}.drawer-trigger{min-height:44px;padding:0 16px;border:1px solid var(--border2);border-radius:10px;background:var(--panel);color:var(--text);cursor:pointer;display:flex;align-items:center;gap:8px;justify-self:center}.app-link{justify-self:end;min-height:44px;padding:0 17px;display:inline-flex;align-items:center;border-radius:10px;background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C;font-weight:800;font-size:14px}.tabs{position:fixed;z-index:88;top:82px;left:0;right:0;height:40px;background:#10291D;border-bottom:1px solid var(--border2)}.tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}.tabs a{min-height:32px;padding:0 16px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;color:var(--text);font-size:13px}.tabs a.is-active{background:var(--green);color:#08110C;font-weight:800}.site-main{padding-top:122px;min-height:60vh}
.page-hero{padding:48px 0 22px}.eyebrow{font-size:12px;color:var(--bright);letter-spacing:.12em;margin:0 0 6px}h1,h2,h3{margin:0;color:var(--title);line-height:1.3}h1{font-size:24px}h2{font-size:20px}h3{font-size:16px}.page-hero p{max-width:780px;margin:16px 0 0;color:var(--muted)}.section{padding:26px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}.section-heading p{margin:0;color:var(--muted)}
.cover-slot,.media-slot{background:var(--deep);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:flex;align-items:center;justify-content:center}.cover-slot{width:100%;height:260px}.media-slot{min-height:160px}.cover-slot img,.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.hero-copy{padding-top:22px}.hero-copy h1{margin-bottom:10px}.hero-copy p{max-width:800px;margin:0}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{min-height:44px;padding:0 18px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;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:#0A0E0C;border:1px solid var(--border2);color:var(--text)}
.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(--border);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}.card .media-slot{margin:-4px -4px 16px;height:180px}.card h2,.card h3{margin-bottom:8px}.card p{margin:0 0 8px;color:var(--muted)}.more{display:inline-flex;align-items:center;min-height:44px;margin-top:8px;color:var(--bright);font-weight:700}.feature{display:grid;grid-template-columns:minmax(0,380px) 1fr;gap:18px;align-items:stretch}.feature .media-slot{height:200px}.feature-copy{background:var(--panel);border:1px solid var(--border);border-radius:var(--r);padding:20px}.feature-copy p{margin:10px 0 0}.number-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin-top:16px}.number-item{padding:12px;border-radius:10px;background:var(--panel2);border:1px solid var(--border)}.number-item strong{display:block;color:var(--bright);font-size:12px}.number-item span{color:var(--text)}
.lesson-list,.plain-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}.lesson-list li,.plain-list li{padding:14px 15px;border-radius:10px;background:var(--panel);border:1px solid var(--border)}.lesson-list strong,.plain-list strong{display:block;color:var(--title)}.lesson-list span,.plain-list span{display:block;color:var(--muted);margin-top:4px}.timeline{position:relative;display:grid;gap:14px;margin-left:9px;padding-left:20px}.timeline:before{content:"";position:absolute;left:3px;top:4px;bottom:4px;width:1px;background:var(--border2)}.timeline-item{position:relative;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:14px 16px}.timeline-item:before{content:"";position:absolute;left:-23px;top:18px;width:9px;height:9px;border-radius:50%;background:var(--bright);box-shadow:0 0 0 4px var(--bg)}.timeline-item h2,.timeline-item h3{margin:8px 0}.timeline-item p{margin:0;color:var(--muted)}.status{display:inline-flex;min-height:26px;align-items:center;padding:0 9px;border-radius:999px;background:var(--green);color:#08110C;font-size:12px;font-weight:800}
.article{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:22px}.article+.article{margin-top:14px}.grid-2 .article+.article{margin-top:0}.article h2{margin-bottom:10px}.article h3{margin-top:18px;margin-bottom:6px}.article p{margin:0 0 12px}.article p:last-child{margin-bottom:0}.article ul{margin:8px 0 0;padding-left:20px}.article li+li{margin-top:6px}.note{margin-top:14px;padding:14px 16px;border-left:3px solid var(--green);background:var(--panel2);color:var(--muted);border-radius:0 10px 10px 0}.faq-item{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px}.faq-item+.faq-item{margin-top:12px}.faq-item h2{font-size:16px;margin-bottom:8px}.faq-item p{margin:0}.index-link-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.index-link{min-height:110px;padding:16px;background:var(--panel);border:1px solid var(--border);border-radius:12px;display:flex;flex-direction:column;justify-content:space-between}.index-link strong{color:var(--title)}.index-link span{color:var(--muted)}.app-feature{display:grid;grid-template-columns:minmax(0,340px) 1fr;gap:20px;align-items:center}.app-feature .media-slot{height:360px}.app-copy{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:22px}.icon-title{display:flex;align-items:center;gap:12px}.icon-slot{width:48px;height:48px;border-radius:10px;background:var(--deep);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;overflow:hidden}.icon-slot img{width:48px;height:48px;object-fit:contain}
.site-footer{margin-top:44px;background:#050706;border-top:1px solid var(--border2);padding:34px 0 calc(72px + env(safe-area-inset-bottom))}.footer-grid{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:22px}.site-footer h2{font-size:13px;margin-bottom:9px;color:var(--sand)}.site-footer section>a{display:block;color:var(--muted);font-size:13px;padding:4px 0}.footer-brand p{font-size:13px;color:var(--muted);margin:12px 0 0;max-width:420px}.footer-logo strong{font-size:16px}.footer-logo em{font-size:12px;color:var(--bright);font-style:normal}.footer-bottom{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px;padding-top:18px;border-top:1px solid var(--border);font-size:13px;color:var(--soft)}.footer-bottom a{color:var(--muted)}
.drawer{position:fixed;z-index:120;top:0;bottom:0;left:0;width:min(400px,86vw);background:var(--deep);border-right:1px solid var(--border2);box-shadow:var(--shadow);transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s ease}.drawer-open .drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:68px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.drawer-brand strong{font-size:16px}.icon-button{width:44px;height:44px;border:1px solid var(--border2);border-radius:10px;background:var(--panel);color:var(--title);font-size:24px;cursor:pointer}.drawer-scroll{height:calc(100% - 68px);overflow-y:auto;padding:10px 14px 28px}.drawer-group{padding:10px 0}.drawer-group h2{font-size:12px;color:var(--bright);margin:0 0 8px;letter-spacing:.1em}.drawer-group a{display:block;padding:10px 12px;border-radius:10px}.drawer-group a:hover,.drawer-group a:focus-visible{background:var(--panel)}.drawer-group strong{display:block;font-size:14px;color:var(--title)}.drawer-group span{display:block;margin-top:2px;color:var(--muted);font-size:12px}
.search-panel{position:fixed;z-index:119;top:82px;left:0;right:0;padding:12px 16px;visibility:hidden;pointer-events:none;transform:translateY(-10px);opacity:0;transition:.2s ease}.search-open .search-panel{visibility:visible;pointer-events:auto;transform:none;opacity:1}.search-card{width:min(760px,100%);margin:0 auto;background:var(--deep);border:1px solid var(--border2);border-radius:14px;padding:16px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between;gap:16px}.search-head strong{display:block;color:var(--title)}.search-head span{display:block;color:var(--muted);font-size:13px}.search-links{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}.search-links a{min-height:44px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:var(--panel);border:1px solid var(--border);color:var(--text)}.page-mask{position:fixed;z-index:110;inset:0;background:rgba(0,0,0,.62);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}.page-mask.is-active{opacity:1;visibility:visible;pointer-events:auto}.scroll-locked{overflow:hidden}.mobile-bottom{display:none}a:focus-visible,button:focus-visible{outline:2px solid var(--sand);outline-offset:3px}.btn:hover,.app-link:hover{filter:brightness(1.08)}.btn-secondary:hover,.drawer-trigger:hover{border-color:var(--bright)}
@media(max-width:900px){.grid-4,.index-link-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature,.app-feature{grid-template-columns:1fr}.feature .media-slot{height:220px}.footer-grid{grid-template-columns:2fr 1fr 1fr}}
@media(max-width:640px){body{padding-bottom:calc(48px + env(safe-area-inset-bottom))}.mainbar-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}.brand-link{min-width:0}.brand-link .brand-image img{max-width:120px}.drawer-trigger,.app-link{padding:0 12px}.tabs{display:none}.site-main{padding-top:82px}.page-hero{padding-top:34px}.cover-slot{height:260px}.grid-2,.grid-3,.grid-4,.index-link-grid{grid-template-columns:1fr}.number-list{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-2 .article+.article{margin-top:0}.search-panel{top:0;bottom:0;padding:0;background:var(--deep)}.search-card{width:100%;height:100%;border:0;border-radius:0;padding:22px 16px;overflow-y:auto}.search-links{grid-template-columns:1fr}.mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;z-index:105;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#050706;border-top:1px solid var(--border2)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:12px;color:var(--muted)}.mobile-bottom a.is-active{background:var(--green);color:#08110C;font-weight:800}.site-footer{padding-bottom:34px}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.app-feature .media-slot{height:320px}}

.content-media{height:220px}