*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#F3FBFA;color:#163834;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{font:inherit}
img{display:block;max-width:100%;height:auto}
.skip-link{position:fixed;left:12px;top:-80px;z-index:9999;background:#fff;color:#0A6B5E;padding:10px 14px;border-radius:8px}
.skip-link:focus{top:10px}
.cyan-line{position:fixed;z-index:500;top:0;left:0;right:0;height:22px;background:#0A6B5E;color:#fff;font-size:12px}
.top-inner,.bar-inner,.mirror-inner,.content-wrap,.footer-inner{width:min(1120px,calc(100% - 32px));margin:0 auto}
.top-inner{height:22px;display:flex;align-items:center;justify-content:space-between}
.plain-action{position:relative;z-index:2;min-width:44px;height:44px;border:0;background:transparent;color:#fff;padding:0 6px;cursor:pointer}
.curtain-bar{position:fixed;z-index:490;top:22px;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid rgba(14,154,136,.16)}
.bar-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}
.brand-link{justify-self:start;display:flex;align-items:center;min-width:86px;height:44px}
.brand-image-slot img,.footer-logo-slot img,.drawer-logo-slot img{height:28px;width:auto;max-width:150px;object-fit:contain;object-position:center}
.brand-image-slot:empty{display:none}
.brand-image-slot:not(:empty)+.brand-fallback{display:none}
.brand-fallback{font-weight:800;color:#0D2E2B;font-size:16px}
.curtain-trigger,.app-link,.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border-radius:10px;font-size:14px;font-weight:700;white-space:nowrap}
.curtain-trigger{justify-self:center;border:1px solid rgba(14,154,136,.42);background:#fff;color:#0A6B5E;padding:0 22px;cursor:pointer}
.app-link{justify-self:end;padding:0 18px;background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff}
.mirror-tabs{position:fixed;z-index:480;top:82px;left:0;right:0;height:40px;background:#F7FFFE;border-bottom:1px solid rgba(14,154,136,.16)}
.mirror-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}
.mirror-inner a{height:30px;display:flex;align-items:center;padding:0 14px;border-radius:8px;color:#0A6B5E;font-size:13px}
.mirror-inner a.is-current{background:#0E9A88;color:#fff}
.site-main{padding-top:122px;min-height:70vh}
.content-wrap{padding:32px 0 56px}
.page-head{padding:26px 0 20px}
.kicker{display:inline-block;margin-bottom:8px;color:#0A6B5E;font-size:13px;font-weight:800;letter-spacing:.08em}
h1,h2,h3,p{margin-top:0}
h1{font-size:24px;line-height:1.3;color:#0D2E2B;margin-bottom:12px}
h2{font-size:20px;line-height:1.45;color:#0D2E2B;margin-bottom:12px}
h3{font-size:16px;line-height:1.45;color:#0D2E2B;margin-bottom:8px}
p{margin-bottom:14px}
.lead{max-width:800px;color:#4A706C;font-size:16px}
.hero-media,.media-slot{background:#F7FFFE;border:1px solid rgba(14,154,136,.16);border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero-media{height:260px}
.media-slot{height:180px}
.media-slot.tall{height:200px}
.media-slot.app-shot{height:360px}
.hero-media img,.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}
.home-intro{padding:18px 0 10px}
.home-intro .brand-name{font-weight:800;color:#0A6B5E;margin-bottom:4px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.button{padding:0 18px;border:1px solid rgba(14,154,136,.42)}
.button.primary{background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff;border-color:transparent}
.button.secondary{background:#fff;color:#0A6B5E}
.section{padding:24px 0}
.section+.section{border-top:1px solid rgba(14,154,136,.16)}
.grid-3,.grid-4,.footer-grid,.discovery-grid{display:grid;gap:16px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card,.soft-card,.number-row,.shelf-row,.policy-block,.faq-item,.timeline-item,.lesson-row{background:#fff;border:1px solid rgba(14,154,136,.16);border-radius:12px;box-shadow:0 12px 28px rgba(10,107,94,.08)}
.card,.soft-card,.policy-block,.faq-item{padding:18px}
.card .media-slot{margin:-2px -2px 16px}
.soft-card{background:#E4F4F1;box-shadow:none}
.card p,.soft-card p,.number-row p,.shelf-row p,.timeline-item p,.lesson-row p{color:#4A706C}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:12px;margin-bottom:14px}
.section-title p{margin:0;color:#6A8E89;font-size:13px}
.number-list,.shelf,.timeline,.lesson-list{display:grid;gap:10px}
.number-row,.shelf-row,.lesson-row{display:grid;grid-template-columns:64px 1fr auto;gap:14px;align-items:center;padding:14px 16px}
.number{font-size:22px;font-weight:900;color:#0E9A88;letter-spacing:.03em}
.row-link{color:#0A6B5E;font-weight:800}
.shelf-row{grid-template-columns:120px 1fr auto}
.shelf-label{font-weight:800;color:#0D2E2B}
.timeline{position:relative;padding-left:18px}
.timeline:before{content:"";position:absolute;left:5px;top:6px;bottom:6px;width:2px;background:#D4EFEC}
.timeline-item{position:relative;padding:16px 16px 16px 18px}
.timeline-item:before{content:"";position:absolute;left:-18px;top:23px;width:10px;height:10px;border-radius:50%;background:#0E9A88;border:3px solid #F3FBFA}
.status{display:inline-flex;align-items:center;min-height:28px;padding:0 10px;border-radius:999px;background:#D4EFEC;color:#0A6B5E;font-size:12px;font-weight:800}
.note-box{padding:18px;border-radius:12px;background:#D4EFEC;color:#163834}
.index-links{display:flex;flex-wrap:wrap;gap:10px}
.index-links a{min-height:44px;display:inline-flex;align-items:center;padding:0 14px;border-radius:10px;background:#fff;border:1px solid rgba(14,154,136,.16);color:#0A6B5E;font-weight:700}
.policy-block+.policy-block,.faq-item+.faq-item{margin-top:12px}
.quote-line{padding-left:14px;border-left:3px solid #1EC8B6;color:#4A706C}
.app-panel{display:grid;grid-template-columns:minmax(220px,340px) 1fr;gap:24px;align-items:center}
.icon-line{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.icon-slot{width:48px;height:48px;border-radius:12px;background:#fff;border:1px solid rgba(14,154,136,.16);display:flex;align-items:center;justify-content:center;overflow:hidden}
.icon-slot img{width:48px;height:48px;object-fit:contain}
.mini-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.mini-links a{min-height:40px;padding:0 12px;display:inline-flex;align-items:center;border:1px solid rgba(14,154,136,.42);border-radius:9px;color:#0A6B5E;background:#fff;font-weight:700}
.site-footer{background:#0A6B5E;color:#D4EFEC;border-top:1px solid rgba(247,255,254,.25)}
.footer-inner{padding:28px 0 calc(28px + env(safe-area-inset-bottom))}
.footer-brand{display:flex;align-items:center;gap:12px;padding-bottom:18px;border-bottom:1px solid rgba(247,255,254,.22)}
.footer-brand strong{display:block;color:#fff;font-size:16px}
.footer-brand span{display:block;font-size:12px}
.footer-grid{grid-template-columns:repeat(4,minmax(0,1fr));padding:20px 0}
.footer-grid h2{font-size:13px;color:#fff;margin-bottom:8px}
.footer-grid a{display:block;font-size:13px;padding:4px 0;color:#D4EFEC}
.footer-note,.copyright{font-size:13px;color:#D4EFEC}
.footer-note{padding-top:14px;border-top:1px solid rgba(247,255,254,.22)}
.copyright{margin-bottom:0}
.page-overlay{position:fixed;inset:0;z-index:700;background:rgba(13,46,43,.36);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}
.page-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}
.curtain-drawer{position:fixed;z-index:720;left:50%;bottom:0;width:min(720px,100%);max-height:70vh;transform:translate(-50%,105%);background:#F7FFFE;border:1px solid rgba(14,154,136,.16);border-radius:16px 16px 0 0;visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s}
.curtain-drawer.is-open{transform:translate(-50%,0);visibility:visible;pointer-events:auto}
.drawer-head{height:62px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid rgba(14,154,136,.16)}
.drawer-brand{display:flex;align-items:center;gap:10px}
.close-button{min-width:60px;min-height:44px;border:1px solid rgba(14,154,136,.42);background:#fff;color:#0A6B5E;border-radius:10px;cursor:pointer}
.drawer-body{padding:14px 18px 24px;overflow-y:auto;max-height:calc(70vh - 62px)}
.drawer-group{padding:8px 0}
.drawer-group h2{font-size:13px;color:#0A6B5E;margin-bottom:8px}
.drawer-group a{display:grid;grid-template-columns:100px 1fr;gap:10px;min-height:44px;padding:8px 0;border-bottom:1px solid rgba(14,154,136,.12)}
.drawer-group b{color:#0D2E2B}
.drawer-group span{color:#4A706C;font-size:13px}
.search-layer{position:fixed;z-index:730;top:82px;left:0;right:0;visibility:hidden;pointer-events:none}
.search-layer.is-open{visibility:visible;pointer-events:auto}
.search-card{width:min(720px,calc(100% - 32px));margin:12px auto 0;background:#fff;border:1px solid rgba(14,154,136,.16);border-radius:14px;box-shadow:0 12px 28px rgba(10,107,94,.08);padding:18px}
.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.search-head strong{font-size:18px;color:#0D2E2B}
.search-head p{margin:4px 0 0;color:#4A706C}
.preset-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.preset-links a{min-height:44px;display:inline-flex;align-items:center;padding:0 14px;border-radius:10px;background:#F3FBFA;border:1px solid rgba(14,154,136,.16);color:#0A6B5E;font-weight:700}
.overlay-open{overflow:hidden}
.mobile-bottom{display:none}
a:hover,.plain-action:hover,.curtain-trigger:hover,.close-button:hover{filter:brightness(.98)}
a:focus-visible,button:focus-visible{outline:3px solid rgba(30,200,182,.45);outline-offset:2px}
@media (max-width:820px){
  .mirror-tabs{display:none}
  .site-main{padding-top:82px;padding-bottom:calc(58px + env(safe-area-inset-bottom))}
  .grid-3,.grid-4,.footer-grid,.discovery-grid,.app-panel{grid-template-columns:1fr}
  .hero-media{height:220px}
  .media-slot{height:170px}
  .media-slot.tall{height:190px}
  .media-slot.app-shot{height:320px}
  .number-row,.shelf-row,.lesson-row{grid-template-columns:56px 1fr}
  .number-row .row-link,.shelf-row .row-link,.lesson-row .row-link{grid-column:2}
  .shelf-row{grid-template-columns:1fr}
  .shelf-row .row-link{grid-column:1}
  .curtain-drawer{max-height:78vh;border-left:0;border-right:0}
  .drawer-body{max-height:calc(78vh - 62px)}
  .search-layer{top:0;bottom:0;background:#0A6B5E;color:#fff}
  .search-card{width:100%;min-height:100%;margin:0;border:0;border-radius:0;background:#0A6B5E;box-shadow:none;padding:calc(28px + env(safe-area-inset-top)) 16px 90px}
  .search-head strong,.search-head p{color:#fff}
  .search-layer .close-button{background:#fff}
  .preset-links a{background:#F7FFFE;color:#0A6B5E}
  .mobile-bottom{position:fixed;z-index:650;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:#fff;border-top:1px solid rgba(14,154,136,.16)}
  .mobile-bottom a{min-height:48px;display:flex;align-items:center;justify-content:center;font-size:12px;color:#0A6B5E}
  .mobile-bottom a.is-current{background:#0E9A88;color:#fff}
}
@media (max-width:520px){
  .top-inner,.bar-inner,.content-wrap,.footer-inner{width:calc(100% - 32px)}
  .bar-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px}
  .brand-link{min-width:0;max-width:100%}
  .brand-image-slot img{max-width:96px}
  .curtain-trigger{padding:0 14px}
  .app-link{padding:0 12px}
  .content-wrap{padding-top:24px}
  h1{font-size:24px}
  .hero-media{height:200px}
  .drawer-group a{grid-template-columns:86px 1fr}
}