:root{
  --bg:#0C100E;--deep:#080A09;--panel:#141A16;--sub:#1A2420;--title:#E8F6EE;--text:#CDE3D6;
  --muted:#8FB3A0;--aux:#6E8F7E;--green:#2A9D5C;--bright:#3CB371;--dark-green:#146B3A;--sand:#EFE6D2;
  --border:rgba(42,157,92,.18);--border-strong:rgba(42,157,92,.45);--shadow:0 12px 28px rgba(8,10,9,.35);
  --max:960px;--top:20px;--brand:54px;--quick:44px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--bg)}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.no-scroll{overflow:hidden}
a{color:inherit;text-decoration:none}button,input{font:inherit}.wrap{width:min(var(--max),calc(100% - 32px));margin:0 auto}.skip-link{position:fixed;left:16px;top:-60px;z-index:200;background:var(--sand);color:#08110C;padding:8px 12px;border-radius:6px}.skip-link:focus{top:8px}.site-header{position:fixed;inset:0 0 auto;z-index:100}.top-strip{height:20px;background:#050706;color:var(--bright);font-size:12px;border-bottom:1px solid var(--border)}.top-strip-inner,.brand-bar-inner,.quick-nav-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.text-button,.menu-button,.close-button{border:0;background:transparent;color:var(--text);cursor:pointer;min-width:44px;min-height:44px}.top-strip .text-button{min-height:20px;padding:0 4px;color:var(--bright);font-size:12px}.brand-bar{height:54px;background:#080A09;border-bottom:1px solid var(--border-strong)}.brand-link,.footer-brand,.panel-brand{display:flex;align-items:center;gap:10px}.small-logo{display:inline-flex;width:auto;min-width:30px;height:24px;align-items:center}.small-logo img{height:24px;width:auto;max-width:150px;object-fit:contain;object-position:center}.brand-fallback{font-size:16px;font-weight:700;color:var(--title)}.brand-link .small-logo:has(img)+.brand-fallback{display:none}.brand-actions{display:flex;align-items:center;gap:6px}.header-app-link,.menu-button{height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 14px;border-radius:8px}.header-app-link{color:#08110C;background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);font-size:14px;font-weight:700}.menu-button{border:1px solid var(--border-strong);color:var(--text)}.quick-nav{height:44px;background:#080A09;border-bottom:1px solid var(--border)}.quick-nav-inner{justify-content:flex-start;gap:10px}.quick-link{width:88px;height:22px;display:flex;align-items:center;justify-content:center;border:1px solid var(--border-strong);border-radius:999px;color:var(--text);font-size:13px;line-height:1}.quick-link.is-current{background:var(--green);color:#08110C;border-color:var(--green);font-weight:700}.site-main{padding-top:118px;min-height:70vh}.page-section{padding:42px 0}.page-section.compact{padding:30px 0}.section-head{margin-bottom:22px}.eyebrow{margin:0 0 8px;color:var(--bright);font-size:12px;letter-spacing:.08em}.section-head h1,.hero-copy h1,.page-hero h1{margin:0;color:var(--title);font-size:24px;line-height:1.3}.section-head h2,.content-card h2,.article-block h2,.feature-copy h2,.policy-block h2{margin:0 0 10px;color:var(--title);font-size:20px;line-height:1.35}.section-head h3,.content-card h3,.article-block h3,.lesson h3,.faq-item h2,.status-row h2{margin:0 0 8px;color:var(--title);font-size:16px;line-height:1.45}.lead{margin:12px 0 0;color:var(--text);max-width:760px}.main-line{font-size:18px;color:var(--sand);margin:10px 0}.body-copy{color:var(--text);margin:0}.muted{color:var(--muted)}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn{min-height:42px;padding:0 18px;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;font-size:14px;white-space:nowrap;border:1px solid transparent}.btn.primary{background:linear-gradient(135deg,#3CB371 0%,#2A9D5C 55%,#146B3A 100%);color:#08110C;font-weight:700}.btn.secondary{background:#0A0D0B;border-color:var(--border-strong);color:var(--text)}a:hover,.btn:hover,.quick-link:hover{filter:brightness(1.06)}a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--sand);outline-offset:3px}.index-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}.index-tabs a{border:1px solid var(--border-strong);border-radius:999px;padding:5px 12px;font-size:13px;color:var(--text)}.content-card,.article-block,.policy-block,.lesson,.status-row,.index-box{background:var(--panel);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow)}.content-card,.article-block,.policy-block,.lesson,.index-box{padding:20px}.media-slot{width:100%;background:#080A09;border:1px solid var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.slot-176{height:176px}.slot-168{height:168px}.slot-160{height:160px}.slot-200{height:200px}.slot-app{height:320px;width:240px;max-width:100%;margin-left:auto}.mini-icon{width:48px;height:48px;border-radius:10px;background:#080A09;border:1px solid var(--border);display:flex;align-items:center;justify-content:center}.mini-icon img{width:48px;height:48px;object-fit:contain}.cut-feature{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:stretch}.cut-feature .content-card{display:flex;flex-direction:column;justify-content:center}.narrow-two{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:14px}.narrow-two .article-block{min-height:100%}.narrow-two .article-block:first-child{border-radius:10px 4px 4px 10px}.narrow-two .article-block:last-child{border-radius:4px 10px 10px 4px}.page-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}.page-pair .content-card:first-child{transform:translateY(8px)}.line-list{display:grid;gap:12px}.line-item{display:grid;grid-template-columns:120px 1fr;gap:18px;padding:18px 0;border-top:1px solid var(--border)}.line-item:first-child{border-top:0}.line-item strong{color:var(--sand)}.lesson-list{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:12px}.lesson{min-height:150px}.lesson p{margin:0}.sound-list{display:grid;gap:10px}.sound-row{padding:16px 18px;background:linear-gradient(90deg,var(--panel),var(--sub));border:1px solid var(--border);border-radius:10px}.sound-row b{display:block;color:var(--title);margin-bottom:4px}.status-list{display:grid;gap:10px}.status-row{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:16px 18px;align-items:start}.status-badge{display:inline-flex;justify-content:center;align-items:center;min-height:34px;border-radius:999px;background:var(--green);color:#08110C;font-weight:700}.wrap-flow{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:24px;align-items:start}.flow-copy p:first-of-type{margin-top:0}.flow-media{float:right;width:240px}.flow-media .mini-icon{margin:14px 0 0 auto}.home-app-wrap{display:block}.home-app-wrap .flow-media{margin:0 0 14px 24px}.home-app-wrap:after{content:"";display:block;clear:both}.home-after{display:grid;gap:18px}.faq-mini{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-mini details{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:14px 16px}.faq-mini summary{cursor:pointer;color:var(--title);font-weight:700}.faq-mini p{margin:10px 0 0}.site-footer{background:#050706;border-top:1px solid var(--border-strong);padding:34px 0 calc(34px + env(safe-area-inset-bottom));font-size:13px}.footer-brand-row{margin-bottom:22px}.footer-brand strong,.panel-brand strong{display:block;color:var(--title);font-size:16px}.footer-brand small,.panel-brand small{display:block;color:var(--muted);font-size:11px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid h2{font-size:13px;color:var(--bright);margin:0 0 8px}.footer-grid a{display:block;color:var(--text);padding:3px 0}.footer-note{border-top:1px solid var(--border);margin-top:24px;padding-top:18px;color:var(--muted)}.overlay{position:fixed;inset:0;background:rgba(0,0,0,.58);z-index:130;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-active{opacity:1;visibility:visible;pointer-events:auto}.side-panel{position:fixed;z-index:140;right:16px;top:82px;width:min(32vw,440px);max-height:76vh;background:#0A0D0B;border:1px solid var(--border-strong);border-radius:12px;box-shadow:var(--shadow);transform:translateX(calc(100% + 40px));visibility:hidden;pointer-events:none;transition:.24s;overflow:auto}.side-panel.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.panel-head{position:sticky;top:0;background:#0A0D0B;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:12px 14px;z-index:1}.panel-groups{padding:8px 14px 18px}.panel-groups section{padding:12px 0;border-top:1px solid var(--border)}.panel-groups section:first-child{border-top:0}.panel-groups h2{font-size:13px;color:var(--bright);margin:0 0 8px}.panel-groups a{display:block;padding:7px 8px;border-radius:8px}.panel-groups a:hover{background:var(--sub)}.panel-groups b{display:block;color:var(--title)}.panel-groups span{display:block;color:var(--muted);font-size:12px}.search-layer{position:fixed;z-index:145;left:0;right:0;top:74px;visibility:hidden;opacity:0;pointer-events:none;transition:.2s}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto}.search-card{width:min(760px,calc(100% - 32px));margin:0 auto;background:#0A0D0B;border:1px solid var(--border-strong);border-radius:0 0 12px 12px;box-shadow:var(--shadow);padding:18px}.search-head{display:flex;justify-content:space-between;gap:18px;align-items:center}.search-head strong{display:block;color:var(--title);font-size:18px}.search-head span{display:block;color:var(--muted);font-size:13px}.search-input-wrap{display:block;color:var(--muted);font-size:12px}.search-input-wrap input{display:block;margin-top:6px;width:100%;min-height:44px;border-radius:8px;border:1px solid var(--border-strong);background:var(--panel);color:var(--title);padding:0 12px}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-links a{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:8px;border:1px solid var(--border-strong);color:var(--text)}.search-empty{color:var(--muted);margin:12px 0 0}.mobile-bottom{display:none}.page-hero{padding:38px 0 22px}.page-hero .lede{max-width:740px;margin:14px 0 0}.layout-index{display:grid;grid-template-columns:180px 1fr;gap:22px}.layout-index .index-rail{display:flex;flex-direction:column;gap:8px;position:sticky;top:138px;height:max-content}.layout-index .index-rail a{padding:10px 12px;background:var(--panel);border:1px solid var(--border);border-radius:8px;color:var(--text)}.layout-index .index-body{display:grid;gap:16px}.layout-cut{display:grid;grid-template-columns:1fr;gap:18px}.layout-cut .cut-band{display:grid;grid-template-columns:180px 1fr;gap:22px;align-items:start;padding:22px 0;border-top:1px solid var(--border)}.layout-cut .cut-band:first-child{border-top:0}.layout-cut .cut-band h2{margin:0;color:var(--sand);font-size:18px}.layout-pages{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}.layout-pages .content-card:nth-child(even){margin-top:28px}.layout-tight-two{display:grid;grid-template-columns:.8fr 1.2fr;gap:16px}.layout-tight-two .stack{display:grid;gap:14px}.lens-list{display:grid;gap:12px}.lens-item{display:grid;grid-template-columns:90px 1fr;background:var(--panel);border:1px solid var(--border);border-radius:10px;overflow:hidden}.lens-step{display:flex;align-items:center;justify-content:center;background:var(--sub);color:var(--sand);font-weight:700}.lens-copy{padding:16px}.classroom-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.classroom-grid .lesson:nth-child(3){grid-column:1 / span 2}.column-index{display:grid;grid-template-columns:1fr 1fr;gap:14px}.column-index .article-block:first-child{grid-row:span 2}.explore-list{display:grid;gap:12px}.explore-link{display:grid;grid-template-columns:150px 1fr auto;gap:18px;align-items:center;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:16px}.explore-link b{color:var(--title);font-size:16px}.explore-link span{color:var(--muted)}.explore-link i{font-style:normal;color:var(--bright)}.policy-list{display:grid;gap:14px}.policy-block p:last-child{margin-bottom:0}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.faq-list{display:grid;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:18px}.faq-item p{margin:0}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.contact-note{padding:14px 16px;border-left:3px solid var(--green);background:var(--panel);color:var(--text)}
@media (max-width:760px){
  :root{--quick:0px}.wrap{width:calc(100% - 32px)}.quick-nav{display:none}.site-main{padding-top:74px;padding-bottom:68px}.page-section{padding:30px 0}.cut-feature,.narrow-two,.page-pair,.lesson-list,.wrap-flow,.layout-index,.layout-pages,.layout-tight-two,.classroom-grid,.column-index,.help-grid,.contact-grid{grid-template-columns:1fr}.layout-pages .content-card:nth-child(even){margin-top:0}.classroom-grid .lesson:nth-child(3){grid-column:auto}.cut-feature .media-slot{order:-1}.line-item,.status-row,.layout-cut .cut-band,.lens-item,.explore-link{grid-template-columns:1fr}.lesson-list{gap:10px}.slot-app{width:100%;max-width:240px;margin:0 auto}.home-app-wrap .flow-media{float:none;margin:0 auto 18px;width:240px;max-width:100%}.faq-mini{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.side-panel{top:66px;right:8px;width:88%;max-height:76vh}.search-layer{inset:0;background:#080A09;top:0;padding:16px;overflow:auto}.search-card{width:100%;min-height:100%;border-radius:12px;margin:0;padding:18px;background:#080A09}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);left:0;right:0;bottom:0;z-index:120;background:#050706;border-top:1px solid var(--border-strong);min-height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;color:var(--text);font-size:13px}.mobile-bottom a.is-current{background:var(--green);color:#08110C;font-weight:700}.site-footer{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.layout-index .index-rail{position:static;display:grid;grid-template-columns:repeat(2,1fr)}.brand-actions{gap:4px}.header-app-link,.menu-button{padding:0 10px}.brand-fallback{font-size:15px}.top-strip-inner{padding:0}.slot-200{height:180px}
}
@media (max-width:420px){.footer-grid{grid-template-columns:1fr}.header-app-link{font-size:13px}.brand-bar-inner{gap:8px}.line-item{gap:8px}.side-panel{width:calc(100% - 16px)}.index-tabs{gap:6px}.index-tabs a{padding:5px 10px}.layout-index .index-rail{grid-template-columns:1fr 1fr}}