:root{
--bg:#F3FBFA;--bg-deep:#E4F4F1;--panel:#FFFFFF;--panel-alt:#D4EFEC;--ink:#0D2E2B;--text:#163834;
--muted:#4A706C;--soft:#6A8E89;--brand:#0E9A88;--bright:#1EC8B6;--deep:#0A6B5E;--porcelain:#F7FFFE;
--line:rgba(14,154,136,.16);--line-strong:rgba(14,154,136,.42);--shadow:0 12px 28px rgba(10,107,94,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden}
body.ui-locked{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button{font:inherit;cursor:pointer}
:focus-visible{outline:3px solid rgba(30,200,182,.42);outline-offset:2px}
.skip-link{position:fixed;left:12px;top:-60px;z-index:1500;background:#fff;color:var(--deep);padding:10px 14px;border-radius:8px}.skip-link:focus{top:8px}
.topline{position:fixed;z-index:1000;top:0;left:0;right:0;height:22px;background:var(--deep);color:#fff}
.topline-inner,.masthead-inner,.quicknav-inner,.footer-inner,.content-wrap{width:min(1120px,calc(100% - 32px));margin:0 auto}
.topline-inner{height:22px;display:flex;align-items:center;justify-content:space-between;font-size:12px;line-height:1}
.top-search-btn{border:0;background:transparent;color:#fff;min-height:22px;padding:0 4px}
.masthead{position:fixed;z-index:990;top:22px;left:0;right:0;height:60px;background:#fff;border-bottom:1px solid var(--line)}
.masthead-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:96px;min-height:44px}.brand-logo,.drawer-logo,.footer-logo{height:28px;width:auto;object-fit:contain;object-position:center}
.brand-fallback{font-size:16px;font-weight:800;color:var(--ink)}
.menu-drawer-btn{justify-self:center;min-width:88px;min-height:44px;border:1px solid var(--line-strong);background:var(--porcelain);color:var(--deep);border-radius:999px;font-size:14px}
.menu-drawer-btn:hover{background:var(--panel-alt)}
.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 16px;border-radius:999px;background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff;font-size:14px}
.quicknav{position:fixed;z-index:980;top:82px;left:0;right:0;height:40px;background:var(--porcelain);border-bottom:1px solid var(--line)}
.quicknav-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px}
.quicknav a{display:inline-flex;align-items:center;min-height:32px;padding:0 14px;border-radius:999px;color:var(--deep)}.quicknav a:hover,.quicknav a.is-active{background:var(--brand);color:#fff}
.site-main{padding:150px 0 64px}.content-wrap{display:block}.page-hero{margin-bottom:28px}
.eyebrow{margin:0 0 8px;color:var(--brand);font-size:13px;font-weight:800;letter-spacing:.08em}h1,h2,h3{margin:0;color:var(--ink);line-height:1.3}
h1{font-size:24px;margin-bottom:12px}h2{font-size:20px;margin-bottom:12px}h3{font-size:16px;margin-bottom:8px}p{margin:0 0 14px}
.lead{font-size:16px;color:var(--muted);max-width:840px}.tagline{font-size:18px;font-weight:800;color:var(--ink);margin:8px 0}
.section{margin-top:28px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}
.section.alt{background:var(--porcelain)}.section.deep{background:var(--deep);color:#fff}.section.deep h2,.section.deep h3,.section.deep p{color:#fff}
.section-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.cards-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.card.soft{background:var(--porcelain)}.card p:last-child{margin-bottom:0}
.card-kicker{font-size:12px;color:var(--brand);font-weight:800;letter-spacing:.08em;margin-bottom:6px}
.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:10px;font-size:14px;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,#1EC8B6 0%,#0E9A88 55%,#0A6B5E 100%);color:#fff}.btn-secondary{background:#fff;border:1px solid var(--line-strong);color:var(--deep)}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(10,107,94,.12)}
.media-slot{background:var(--porcelain);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.media-slot img,.media-placeholder{width:100%;height:100%;object-fit:contain;object-position:center}.media-placeholder{background:linear-gradient(135deg,var(--porcelain),var(--bg-deep))}
.media-banner{height:260px}.media-wide{height:200px}.media-card{height:180px}.media-app{height:360px;max-width:520px;margin:0 auto}.hero-image{margin-bottom:18px}.hero-copy{max-width:860px}
.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:var(--shadow)}.feature-card .copy{padding:18px}
.numbered-list,.shelf-list,.faq-list{display:grid;gap:10px}.numbered-item{display:grid;grid-template-columns:54px 1fr;gap:14px;align-items:start;padding:14px 0;border-bottom:1px solid var(--line)}
.numbered-item:last-child{border-bottom:0}.number{font-size:26px;line-height:1;color:var(--brand);font-weight:900}
.shelf-item{display:grid;grid-template-columns:140px 1fr auto;gap:16px;align-items:center;padding:14px 0;border-bottom:1px solid var(--line)}.shelf-item:last-child{border-bottom:0}
.shelf-label{font-weight:800;color:var(--deep)}.shelf-note{color:var(--muted)}.text-link{color:var(--deep);font-weight:800;text-decoration:underline;text-decoration-color:rgba(14,154,136,.36);text-underline-offset:4px}
.timeline{position:relative;margin-left:10px;padding-left:24px}.timeline:before{content:"";position:absolute;left:4px;top:10px;bottom:10px;width:2px;background:var(--line-strong)}
.timeline-item{position:relative;padding:0 0 22px}.timeline-item:before{content:"";position:absolute;left:-25px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 5px var(--bg-deep)}
.status{display:inline-flex;align-items:center;min-height:28px;padding:0 9px;border-radius:999px;background:var(--bg-deep);color:var(--deep);font-size:12px;font-weight:800}
.index-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.index-card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;min-height:140px}
.index-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow)}.index-card span{display:block;margin-top:8px;color:var(--muted);font-size:13px}
.prose h2{margin-top:26px}.prose h3{margin-top:20px}.faq-item{padding:18px;background:#fff;border:1px solid var(--line);border-radius:12px}.faq-item h2{font-size:17px}
.app-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:24px;align-items:center}.brand-statement{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:center}
.site-footer{background:var(--deep);color:#D4EFEC;border-top:1px solid rgba(247,255,254,.34);padding:32px 0 calc(32px + env(safe-area-inset-bottom))}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}.footer-brand strong,.footer-brand span{display:block;color:#fff}.footer-brand span{font-size:13px;color:#D4EFEC}
.footer-links{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.footer-links h2{font-size:13px;color:#fff;margin-bottom:8px}.footer-links a{display:block;font-size:13px;padding:3px 0;color:#D4EFEC}
.footer-links a:hover{color:#fff;text-decoration:underline}.footer-note,.copyright{font-size:13px;margin-top:18px;margin-bottom:0}.copyright{color:#fff}
.site-overlay{position:fixed;inset:0;z-index:1100;background:rgba(13,46,43,.38);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
.site-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}
.drawer-panel{position:fixed;z-index:1200;left:50%;bottom:0;width:min(720px,100%);max-height:70vh;transform:translate(-50%,105%);background:#fff;border-radius:18px 18px 0 0;box-shadow:0 -18px 50px rgba(13,46,43,.2);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s ease;overflow:auto}
.drawer-panel.is-open{transform:translate(-50%,0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;z-index:3;display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:#fff;border-bottom:1px solid var(--line)}
.drawer-brand{display:flex;align-items:center;gap:10px}.icon-close,.search-close{min-height:44px;padding:0 14px;border:1px solid var(--line-strong);border-radius:999px;background:#fff;color:var(--deep)}
.drawer-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px;padding:10px 18px 24px}.drawer-group{padding-top:14px}.drawer-group h2{font-size:13px;color:var(--brand);margin-bottom:6px}
.drawer-group a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.drawer-group strong{display:block;color:var(--ink)}.drawer-group span{display:block;color:var(--muted);font-size:13px;margin-top:2px}
.search-layer{position:fixed;z-index:1210;top:82px;left:50%;width:min(720px,calc(100% - 32px));transform:translateX(-50%) translateY(-16px);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
.search-layer.is-open{transform:translateX(-50%) translateY(0);opacity:1;visibility:visible;pointer-events:auto}.search-card{background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);padding:18px}
.search-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.search-head strong{font-size:18px;color:var(--ink)}.search-head p{font-size:13px;color:var(--muted);margin:2px 0 0}
.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.search-presets a{display:inline-flex;align-items:center;min-height:42px;padding:0 14px;border-radius:999px;background:var(--porcelain);border:1px solid var(--line);color:var(--deep);font-weight:800}
.search-help{font-size:13px;color:var(--muted);margin:14px 0 0}.mobile-bottom{display:none}
@media(max-width:760px){
.quicknav{display:none}.site-main{padding:108px 0 82px}.topline-inner,.masthead-inner,.footer-inner,.content-wrap{width:calc(100% - 32px)}.masthead-inner{gap:8px}.brand-link{min-width:0}.brand-logo{max-width:104px}
.menu-drawer-btn{min-width:72px;padding:0 12px}.app-link{padding:0 12px}.section{padding:18px}.section-grid,.feature-grid,.cards-2,.footer-links,.drawer-groups,.index-grid,.app-layout,.brand-statement{grid-template-columns:1fr}
.media-banner{height:260px}.media-card{height:180px}.media-wide{height:200px}.media-app{height:340px}.shelf-item{grid-template-columns:1fr;gap:5px}
.drawer-panel{left:0;width:100%;max-height:78vh;transform:translateY(105%)}.drawer-panel.is-open{transform:translateY(0)}
.search-layer{inset:0;width:auto;transform:none;background:var(--deep);color:#fff;padding:calc(28px + env(safe-area-inset-top)) 16px 72px;overflow:auto}.search-layer.is-open{transform:none}
.search-card{background:transparent;border:0;box-shadow:none;padding:0}.search-head strong,.search-head p{color:#fff}.search-close{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.search-presets a{background:#fff;color:var(--deep);border-color:#fff}.search-help{color:#D4EFEC}
.mobile-bottom{position:fixed;z-index:970;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 var(--line)}
.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:13px;color:var(--deep)}.mobile-bottom a.is-active{background:var(--brand);color:#fff}
.site-footer{padding-bottom:calc(86px + env(safe-area-inset-bottom))}
}

.section-spacer{margin-top:18px}.timeline-spacer{margin-top:22px}.app-icon{width:48px;height:48px;object-fit:contain;object-position:center;margin:12px auto 0}