*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#F3FBFA;color:#163834;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}body.overlay-open{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.top-line{position:fixed;z-index:80;top:0;left:0;right:0;height:22px;background:#0A6B5E;color:#fff;font-size:12px}.top-line-inner,.stage-inner,.quick-tabs-inner,.footer-inner,.page-shell{width:min(1120px,calc(100% - 32px));margin:0 auto}.top-line-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.plain-action{border:0;background:transparent;color:#fff;min-width:44px;height:22px;padding:0 6px;cursor:pointer}.stage-bar{position:fixed;z-index:79;top:22px;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid rgba(14,154,136,.16)}.stage-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.brand-link{justify-self:start;display:inline-flex;align-items:center;min-height:44px}.brand-logo,.footer-logo,.drawer-logo{height:28px;width:auto;max-width:170px;object-fit:contain;object-position:center}.brand-fallback{font-size:16px;font-weight:800;color:#0D2E2B}.drawer-trigger{justify-self:center;display:flex;align-items:center;gap:8px;min-width:76px;height:44px;border:1px solid rgba(14,154,136,.42);border-radius:12px;background:#F7FFFE;color:#0A6B5E;font-weight:700;cursor:pointer}.drawer-trigger i,.drawer-trigger i:before,.drawer-trigger i:after{display:block;width:14px;height:2px;background:#0E9A88;content:""}.drawer-trigger i{position:relative}.drawer-trigger i:before{position:absolute;top:-5px}.drawer-trigger i:after{position:absolute;top:5px}.app-entry{justify-self:end;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 15px;border-radius:12px;background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff;font-size:14px;font-weight:800}.quick-tabs{position:fixed;z-index:78;top:82px;left:0;right:0;height:40px;background:#F7FFFE;border-bottom:1px solid rgba(14,154,136,.16)}.quick-tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}.quick-tabs a{display:inline-flex;align-items:center;justify-content:center;min-width:92px;height:30px;padding:0 14px;border-radius:9px;font-size:13px;color:#0A6B5E}.quick-tabs a.is-active{background:#0E9A88;color:#fff}.site-main{padding-top:122px;padding-bottom:24px}.page-shell{padding:34px 0 64px}.hero-block,.section-block,.note-panel,.policy-block,.faq-item,.index-card,.index-section,.timeline-item,.number-item,.shelf-row,.lesson-card,.directory-card,.discovery-card{background:#fff;border:1px solid rgba(14,154,136,.16);box-shadow:0 12px 28px rgba(10,107,94,.08);border-radius:14px}.hero-block{padding:28px;margin-bottom:22px}.eyebrow{display:inline-block;margin-bottom:8px;color:#0E9A88;font-size:12px;font-weight:800;letter-spacing:.08em}.hero-block h1{margin:0;color:#0D2E2B;font-size:24px;line-height:1.3}.hero-block .lead{max-width:820px;margin:14px 0 0;color:#4A706C}.section-block{padding:24px;margin:18px 0}.section-block h2,.index-section h2,.note-panel h2,.policy-block h2{margin:0 0 12px;color:#0D2E2B;font-size:20px;line-height:1.4}.section-block h3,.index-card h3,.timeline-item h3,.number-item h3,.shelf-row h3,.lesson-card h3,.directory-card h3,.discovery-card h3{margin:0 0 8px;color:#0D2E2B;font-size:16px}.section-block p,.index-section p,.note-panel p,.policy-block p,.faq-item p,.index-card p,.timeline-item p,.number-item p,.shelf-row p,.lesson-card p,.directory-card p,.discovery-card p{margin:8px 0;color:#163834}.media-slot{display:flex;align-items:center;justify-content:center;width:100%;min-height:200px;margin:18px 0;background:#F7FFFE;border:1px dashed rgba(14,154,136,.42);border-radius:14px;overflow:hidden}.media-slot img{display:block;width:100%;height:100%;max-height:100%;object-fit:contain;object-position:center}.media-slot.banner{height:260px;min-height:260px;margin-top:0}.media-slot.card-media{height:180px;min-height:180px}.media-slot.section-media{height:200px;min-height:200px}.media-slot.app-media{height:360px;min-height:260px}.media-slot.icon-slot{width:64px;height:64px;min-height:64px;margin:0}.media-slot.icon-slot img{width:48px;height:48px}.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{display:inline-flex;align-items:center;justify-content:center;height:42px;padding:0 17px;border-radius:11px;font-size:14px;font-weight:800;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff}.btn-secondary{background:#fff;border:1px solid rgba(14,154,136,.42);color:#0A6B5E}.btn:hover,.app-entry:hover,.drawer-trigger:hover,.search-presets a:hover,.quick-tabs a:hover{transform:translateY(-1px)}a:focus-visible,button:focus-visible{outline:3px solid rgba(30,200,182,.35);outline-offset:2px}.three-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:18px 0}.index-card{padding:18px}.index-card .media-slot{margin:0 0 14px}.index-section{padding:24px;margin:18px 0}.number-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:16px}.mini-number{padding:14px;border-radius:12px;background:#D4EFEC;color:#0D2E2B}.mini-number strong{display:block;color:#0E9A88;font-size:18px}.shelf-list,.timeline,.number-list,.lesson-grid,.directory-grid,.discovery-grid{display:grid;gap:12px;margin-top:14px}.shelf-row{display:grid;grid-template-columns:72px 1fr auto;gap:16px;align-items:center;padding:16px}.shelf-no,.big-no{font-weight:900;color:#0E9A88}.shelf-no{font-size:22px}.shelf-tag{font-size:13px;color:#4A706C}.number-item{display:grid;grid-template-columns:72px 1fr;gap:14px;padding:18px}.big-no{font-size:32px;line-height:1}.timeline{position:relative;padding-left:18px}.timeline:before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:2px;background:#D4EFEC}.timeline-item{position:relative;padding:18px}.timeline-item:before{content:"";position:absolute;left:-19px;top:23px;width:10px;height:10px;border-radius:50%;background:#0E9A88;box-shadow:0 0 0 4px #F3FBFA}.status{display:inline-flex;align-items:center;min-height:28px;padding:0 9px;border-radius:999px;background:#D4EFEC;color:#0A6B5E;font-size:12px;font-weight:800}.lesson-grid,.directory-grid,.discovery-grid{grid-template-columns:repeat(2,1fr)}.lesson-card,.directory-card,.discovery-card{padding:20px}.note-panel{padding:22px;background:#E4F4F1}.policy-block{padding:22px}.app-feature{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(260px,.7fr);gap:22px;align-items:start}.app-brand-line{display:flex;align-items:center;gap:12px}.faq-list{display:grid;gap:12px}.faq-item{padding:20px}.faq-item h2{font-size:16px;line-height:1.5;margin:0;color:#0D2E2B}.link-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.link-cards a{display:block;padding:18px;border:1px solid rgba(14,154,136,.16);border-radius:12px;background:#F7FFFE}.link-cards strong{display:block;color:#0D2E2B;margin-bottom:5px}.link-cards span{color:#4A706C;font-size:13px}.site-footer{background:#0A6B5E;color:#D4EFEC;border-top:1px solid rgba(247,255,254,.35)}.footer-inner{padding:34px 0 80px}.footer-brand{display:flex;align-items:center;gap:14px;padding-bottom:20px;border-bottom:1px solid rgba(247,255,254,.22)}.footer-brand strong,.footer-brand span{display:block}.footer-brand strong{color:#fff;font-size:16px}.footer-brand span{font-size:12px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;padding:22px 0}.footer-grid h2{margin:0 0 8px;color:#fff;font-size:13px}.footer-grid a{display:block;padding:4px 0;font-size:13px}.footer-note,.copyright{font-size:13px;color:#D4EFEC}.copyright{margin-bottom:0}.screen-mask{position:fixed;z-index:90;inset:0;background:rgba(4,35,31,.45);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.screen-mask.is-open{opacity:1;visibility:visible;pointer-events:auto}.nav-drawer{position:fixed;z-index:92;left:50%;bottom:0;width:min(720px,100%);max-height:70vh;transform:translate(-50%,105%);background:#fff;border-radius:16px 16px 0 0;box-shadow:0 -16px 50px rgba(10,107,94,.18);visibility:hidden;pointer-events:none;transition:transform .25s ease,visibility .25s}.nav-drawer.is-open{transform:translate(-50%,0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid rgba(14,154,136,.16)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand strong{color:#0D2E2B}.close-btn{min-width:58px;height:40px;border:1px solid rgba(14,154,136,.42);border-radius:10px;background:#fff;color:#0A6B5E;cursor:pointer}.drawer-scroll{max-height:calc(70vh - 69px);overflow-y:auto;padding:16px}.drawer-group{margin-bottom:18px}.drawer-group h2{margin:0 0 9px;font-size:13px;color:#4A706C}.drawer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.drawer-links a{display:block;padding:12px;border-radius:11px;background:#F7FFFE;border:1px solid rgba(14,154,136,.16)}.drawer-links strong,.drawer-links span{display:block}.drawer-links strong{color:#0D2E2B;font-size:14px}.drawer-links span{margin-top:2px;color:#4A706C;font-size:12px;line-height:1.5}.search-layer{position:fixed;z-index:93;top:82px;left:0;right:0;visibility:hidden;pointer-events:none;transform:translateY(-14px);opacity:0;transition:.2s}.search-layer.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.search-card{width:min(720px,calc(100% - 32px));margin:0 auto;padding:22px;background:#fff;border:1px solid rgba(14,154,136,.16);border-radius:0 0 14px 14px;box-shadow:0 18px 40px rgba(10,107,94,.14)}.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.search-head h2{margin:0;color:#0D2E2B;font-size:20px}.search-card p{color:#4A706C}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border-radius:10px;background:#D4EFEC;color:#0A6B5E;font-weight:700}.mobile-bottom{display:none}.muted{color:#4A706C}.check-list{margin:10px 0 0;padding-left:20px}.check-list li{margin:6px 0}.quote-note{padding:16px 18px;border-left:3px solid #0E9A88;background:#F7FFFE;border-radius:0 10px 10px 0}.tag-row{display:flex;flex-wrap:wrap;gap:8px}.tag-row span{display:inline-flex;align-items:center;min-height:30px;padding:0 10px;border-radius:999px;background:#D4EFEC;color:#0A6B5E;font-size:12px;font-weight:700}
@media(max-width:760px){.top-line-inner,.stage-inner,.footer-inner,.page-shell{width:calc(100% - 32px)}.quick-tabs{display:none}.site-main{padding-top:82px;padding-bottom:64px}.stage-inner{grid-template-columns:1fr auto 1fr}.brand-logo{max-width:112px}.drawer-trigger{min-width:64px;padding:0 10px}.app-entry{padding:0 10px}.page-shell{padding-top:24px}.hero-block,.section-block,.index-section{padding:20px}.three-grid,.lesson-grid,.directory-grid,.discovery-grid,.link-cards,.footer-grid,.app-feature{grid-template-columns:1fr}.number-grid{grid-template-columns:repeat(2,1fr)}.shelf-row{grid-template-columns:52px 1fr}.shelf-tag{grid-column:2}.number-item{grid-template-columns:48px 1fr}.drawer-links{grid-template-columns:1fr}.nav-drawer{max-height:78vh}.drawer-scroll{max-height:calc(78vh - 69px)}.search-layer{top:22px;bottom:0;background:#0A6B5E}.search-card{width:100%;height:100%;margin:0;border:0;border-radius:0;background:#0A6B5E;color:#fff;padding:28px 16px}.search-card .eyebrow,.search-card h2,.search-card p{color:#fff}.search-card .close-btn{background:#F7FFFE}.search-presets a{background:#F7FFFE;color:#0A6B5E}.mobile-bottom{position:fixed;z-index:75;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid rgba(14,154,136,.16)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;color:#4A706C}.mobile-bottom a.is-active{background:#0E9A88;color:#fff}.footer-inner{padding-bottom:78px}.media-slot.banner{height:220px;min-height:220px}.media-slot.app-media{height:320px}.footer-grid{gap:12px}.footer-grid>div{padding-bottom:10px;border-bottom:1px solid rgba(247,255,254,.14)}}