:root{--bg:#0D0D0D;--deep:#070707;--panel:#171717;--panel2:#222;--title:#F2F2F2;--text:#C8C8C8;--muted:#9A9A9A;--soft:#6E6E6E;--silver:#C8C8C8;--bright:#E8E8E8;--ink:#1A1A1A;--red:#B85A5A;--line:rgba(232,232,232,.12);--line-strong:rgba(232,232,232,.36);--shadow:0 12px 28px rgba(0,0,0,.45);--max:1120px;--top:122px}
*{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}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:min(calc(100% - 32px),var(--max));margin:0 auto}.site-header{position:fixed;inset:0 0 auto;z-index:1000;box-shadow:0 2px 0 rgba(255,255,255,.03)}.inkline{height:22px;background:var(--deep);border-bottom:1px solid var(--line);font-size:12px;color:var(--silver)}.inkline-inner{height:22px;display:flex;align-items:center;justify-content:space-between}.text-button{appearance:none;border:0;background:none;color:var(--bright);padding:0 4px;min-height:22px}.material-bar{height:60px;background:var(--ink);border-bottom:1px solid var(--line)}.material-bar-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.brand-link{justify-self:start;display:inline-flex;align-items:center;min-height:44px}.brand-logo{display:block;height:28px;width:auto;max-width:170px;object-fit:contain;object-position:left center}.brand-wordmark{font-size:16px;font-weight:700;color:var(--title);letter-spacing:.08em}.drawer-trigger,.app-link,.button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:0 18px;font-size:14px;white-space:nowrap}.drawer-trigger{border:1px solid var(--line-strong);background:var(--panel);color:var(--bright);justify-self:center}.app-link{justify-self:end;background:linear-gradient(135deg,#E8E8E8 0%,#C8C8C8 55%,#8A8A8A 100%);color:var(--bg);font-weight:700}.case-tabs{height:40px;background:var(--deep);border-bottom:1px solid var(--line)}.case-tabs-inner{height:40px;display:flex;align-items:center;justify-content:center;gap:8px}.case-tabs a{height:32px;min-width:88px;display:flex;align-items:center;justify-content:center;border-radius:8px;font-size:13px;color:var(--silver)}.case-tabs a:hover,.case-tabs a:focus-visible{background:var(--panel2)}.case-tabs a.is-current{background:var(--bright);color:var(--bg);font-weight:700}.site-main{padding-top:calc(var(--top) + 28px);padding-bottom:48px;min-height:70vh}.page-hero{padding:28px 0 18px}.eyebrow{font-size:12px;color:var(--muted);letter-spacing:.18em;text-transform:uppercase}.page-hero h1,.cover-copy h1{font-size:24px;line-height:1.3;color:var(--title);margin:8px 0 12px}.page-hero p,.cover-copy p{margin:0;max-width:820px}.cover{padding:20px 0 8px}.media-slot{width:100%;background:var(--ink);border:1px solid var(--line);border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-banner{height:260px}.media-feature{height:200px}.media-card{height:180px}.media-app{height:360px}.media-inline{height:220px}.cover-copy{padding:20px 0 12px}.cover-copy .brand-kicker{color:var(--bright);font-weight:700;letter-spacing:.08em}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.button.primary{background:linear-gradient(135deg,#E8E8E8 0%,#C8C8C8 55%,#8A8A8A 100%);color:var(--bg);font-weight:700}.button.secondary{border:1px solid var(--line-strong);background:var(--deep);color:var(--bright)}.section{padding:26px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:16px}.section-head h2{font-size:20px;color:var(--title);margin:0}.section-head p{margin:0;color:var(--muted);max-width:580px}.cards-3,.cards-2,.cards-4{display:grid;gap:16px}.cards-3{grid-template-columns:repeat(3,1fr)}.cards-2{grid-template-columns:repeat(2,1fr)}.cards-4{grid-template-columns:repeat(4,1fr)}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:var(--shadow)}.card h3{font-size:16px;color:var(--title);margin:12px 0 8px}.card p{margin:0;color:var(--text)}.number-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}.number-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px;min-height:130px}.number-item b{display:block;color:var(--bright);font-size:26px;line-height:1;margin-bottom:14px}.number-item strong{color:var(--title);display:block;margin-bottom:6px}.shelf{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.shelf a,.shelf-item{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:16px;min-height:140px;display:flex;flex-direction:column;justify-content:space-between}.shelf small{color:var(--muted)}.shelf strong{color:var(--title);font-size:16px}.proof-list{display:grid;gap:10px;counter-reset:proof}.proof-item{display:grid;grid-template-columns:54px 1fr;gap:14px;align-items:start;padding:16px;border-radius:12px;border:1px solid var(--line);background:var(--panel)}.proof-num{font-size:26px;line-height:1;color:var(--bright);font-weight:700}.timeline{position:relative;display:grid;gap:14px;margin-left:10px}.timeline:before{content:"";position:absolute;left:10px;top:10px;bottom:10px;width:1px;background:var(--line-strong)}.timeline-item{position:relative;padding-left:42px}.timeline-item:before{content:"";position:absolute;left:3px;top:10px;width:15px;height:15px;border-radius:50%;background:var(--bright);border:4px solid var(--bg)}.timeline-item .inner{padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:12px}.status{display:inline-flex;padding:3px 9px;border-radius:999px;background:var(--bright);color:var(--bg);font-size:12px;font-weight:700}.memo-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.memo{padding:18px;border-left:3px solid var(--red);background:var(--panel);border-radius:0 12px 12px 0}.memo h3{margin:0 0 8px;color:var(--title)}.article{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px}.article h2{font-size:20px;color:var(--title);margin:28px 0 10px}.article h2:first-child{margin-top:0}.article h3{font-size:16px;color:var(--title);margin:20px 0 8px}.article p{margin:0 0 14px}.article ul,.article ol{padding-left:22px;margin:8px 0 18px}.article li{margin-bottom:8px}.article a{color:var(--bright);text-decoration:underline;text-underline-offset:3px}.callout{padding:16px 18px;border:1px solid var(--line-strong);border-radius:12px;background:var(--deep);margin:18px 0}.callout strong{color:var(--title)}.faq-list{display:grid;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}.faq-item h2,.faq-item h3{font-size:16px;color:var(--title);margin:0 0 8px}.faq-item p{margin:0}.app-showcase{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:24px;align-items:center}.app-icon{width:48px;height:48px;border-radius:12px;background:var(--panel2);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:14px}.app-icon img{width:48px;height:48px;object-fit:contain}.link-list{display:grid;gap:10px}.link-list a{display:flex;justify-content:space-between;gap:18px;padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}.link-list a span:last-child{color:var(--muted)}.site-footer{background:var(--deep);border-top:1px solid var(--line);color:var(--silver);font-size:13px;padding:30px 0 70px}.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:22px}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{font-size:16px;color:var(--title)}.footer-brand span{color:var(--muted);font-size:11px;letter-spacing:.14em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.footer-grid section{display:flex;flex-direction:column;gap:6px}.footer-grid h2{font-size:13px;color:var(--title);margin:0 0 4px}.footer-grid a:hover,.footer-grid a:focus-visible{color:var(--bright)}.footer-note{margin:22px 0 8px;color:var(--muted);max-width:900px}.copyright{margin:0;color:var(--soft)}.overlay{position:fixed;inset:0;z-index:1090;background:rgba(0,0,0,.64);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-active{opacity:1;visibility:visible}.material-drawer{position:fixed;left:0;top:0;bottom:0;z-index:1100;width:min(400px,86vw);background:var(--deep);border-right:1px solid var(--line-strong);transform:translateX(-100%);transition:.22s ease;visibility:hidden;pointer-events:none;overflow:auto}.material-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:var(--deep);z-index:2;display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;align-items:center;gap:10px}.drawer-brand>div{display:flex;flex-direction:column}.drawer-brand span{font-size:10px;color:var(--muted);letter-spacing:.12em}.icon-button{min-height:44px;border:1px solid var(--line-strong);border-radius:9px;background:var(--panel);color:var(--bright);padding:0 12px}.drawer-body{padding:8px 16px 28px}.drawer-body section{padding:14px 0;border-bottom:1px solid var(--line)}.drawer-body h2{font-size:12px;color:var(--muted);margin:0 0 8px;letter-spacing:.15em}.drawer-body a{display:block;padding:10px 8px;border-radius:8px}.drawer-body a:hover,.drawer-body a:focus-visible{background:var(--panel)}.drawer-body strong{display:block;color:var(--title);font-size:14px}.drawer-body span{display:block;color:var(--muted);font-size:12px}.search-layer{position:fixed;z-index:1110;left:0;right:0;top:82px;visibility:hidden;pointer-events:none;opacity:0;transition:.18s}.search-layer.is-open{visibility:visible;pointer-events:auto;opacity:1}.search-card{width:min(calc(100% - 32px),760px);margin:0 auto;background:var(--ink);border:1px solid var(--line-strong);border-radius:0 0 14px 14px;padding:18px;box-shadow:var(--shadow)}.search-head{display:flex;justify-content:space-between;gap:18px;align-items:center}.search-head>div{display:flex;flex-direction:column}.search-head strong{color:var(--title);font-size:16px}.search-head span{color:var(--muted);font-size:13px}.search-presets{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-presets a{min-height:44px;padding:0 14px;border:1px solid var(--line);border-radius:9px;display:inline-flex;align-items:center;background:var(--panel);color:var(--bright)}.ui-locked{overflow:hidden}.mobile-bottom{display:none}a:focus-visible,button:focus-visible{outline:2px solid var(--bright);outline-offset:3px}
@media(max-width:820px){:root{--top:82px}.case-tabs{display:none}.site-main{padding-top:calc(var(--top) + 22px);padding-bottom:86px}.material-bar-inner{grid-template-columns:1fr auto 1fr;gap:6px}.brand-logo{max-width:115px}.brand-wordmark{font-size:15px}.drawer-trigger,.app-link{padding:0 11px;min-height:44px}.cards-3,.cards-4,.shelf{grid-template-columns:repeat(2,1fr)}.cards-2,.memo-grid,.app-showcase{grid-template-columns:1fr}.number-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.search-layer{inset:0;top:0;background:var(--deep)}.search-layer.is-open{visibility:visible}.search-card{width:100%;height:100%;border:0;border-radius:0;padding:22px 16px;overflow:auto}.mobile-bottom{position:fixed;left:0;right:0;bottom:0;z-index:1050;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--deep);border-top:1px solid var(--line-strong);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;min-width:0}.mobile-bottom a.is-current{background:var(--bright);color:var(--bg);font-weight:700}.site-footer{padding-bottom:90px}.media-banner{height:220px}.media-app{height:320px}.article{padding:18px}}
@media(max-width:520px){.shell{width:min(calc(100% - 32px),var(--max))}.inkline-inner{font-size:11px}.brand-wordmark{letter-spacing:0}.cards-3,.cards-4,.shelf,.number-grid,.footer-grid{grid-template-columns:1fr}.page-hero{padding-top:18px}.media-banner{height:190px}.media-card{height:160px}.media-feature{height:180px}.section{padding:20px 0}.section-head{align-items:start;flex-direction:column;gap:6px}.proof-item{grid-template-columns:44px 1fr}.proof-num{font-size:22px}.link-list a{flex-direction:column;gap:4px}.app-link{font-size:12px}.drawer-trigger{font-size:13px}}

.mt-16{margin-top:16px}.mt-18{margin-top:18px}