:root {
    --bg:#0D0D0D; --bg-deep:#070707; --panel:#171717; --panel-2:#222222;
    --title:#F2F2F2; --text:#C8C8C8; --muted:#9A9A9A; --soft:#6E6E6E;
    --silver:#C8C8C8; --silver-hi:#E8E8E8; --ink:#1A1A1A; --mist:#B85A5A;
    --border:rgba(232,232,232,.12); --border-strong:rgba(232,232,232,.36);
    --shadow:0 12px 28px rgba(0,0,0,.45); --radius:12px; --shell:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg-deep)}
body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7;overflow-x:hidden;padding-top:122px}
body.overlay-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{color:inherit}
img{display:block;max-width:100%;height:auto}
.shell{width:min(calc(100% - 32px),var(--shell));margin:0 auto}
.skip-link{position:fixed;left:16px;top:-60px;z-index:400;background:var(--silver-hi);color:var(--bg);padding:10px 14px;border-radius:8px}.skip-link:focus{top:12px}
.site-header{position:fixed;inset:0 0 auto 0;z-index:200}
.ink-line{height:22px;background:var(--bg-deep);border-bottom:1px solid var(--border);font-size:12px;color:var(--silver)}
.ink-line__inner{height:22px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.text-button,.drawer-trigger,.drawer-close,.search-head button{border:0;background:none;padding:0;cursor:pointer}
.text-button{position:relative;min-width:44px;height:22px;text-align:right;color:var(--silver-hi)}.text-button:before{content:"";position:absolute;inset:-11px -4px}
.material-bar{height:60px;background:var(--ink);border-bottom:1px solid var(--border-strong)}
.material-bar__inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:18px}
.brand-link{display:flex;align-items:center;justify-self:start;min-height:44px}.brand-link img,.drawer-brand img,.footer-brand img{height:28px;width:auto;max-width:180px;object-fit:contain}.brand-fallback{font-size:16px;font-weight:700;color:var(--silver-hi)}
.drawer-trigger{justify-self:center;min-width:76px;height:44px;border:1px solid var(--border-strong);border-radius:999px;color:var(--silver-hi);background:#111}
.app-link{justify-self:end;display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 16px;border-radius:999px;background:linear-gradient(135deg,#E8E8E8 0%,#C8C8C8 55%,#8A8A8A 100%);color:#0D0D0D;font-weight:700}
.case-tabs{height:40px;background:#111;border-bottom:1px solid var(--border)}
.case-tabs__inner{height:40px;display:flex;justify-content:center;align-items:center;gap:8px}.case-tabs a{height:32px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:8px;font-size:13px;color:var(--silver)}.case-tabs a.is-active{background:var(--silver);color:var(--bg)}
.site-main{min-height:70vh;padding-bottom:72px}
.page-hero{padding:36px 0 22px;border-bottom:1px solid var(--border)}
.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--muted);text-transform:uppercase}.page-hero h1,.cover-copy h1{font-size:24px;line-height:1.3;margin:8px 0 12px;color:var(--title)}
.page-hero p,.cover-copy p{margin:0;max-width:840px;color:var(--text)}
.cover{padding:26px 0 38px}.cover .banner-slot{width:100%;height:260px;background:var(--ink);border:1px solid var(--border);border-radius:14px;overflow:hidden;display:flex;align-items:center;justify-content:center}.banner-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.cover-copy{padding:20px 0 0}.cover-actions,.button-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:10px;font-size:14px;font-weight:700}.btn-primary{background:linear-gradient(135deg,#E8E8E8 0%,#C8C8C8 55%,#8A8A8A 100%);color:#0D0D0D}.btn-secondary{background:#111;color:var(--silver-hi);border:1px solid var(--border-strong)}
.btn:hover,.app-link:hover,.drawer-trigger:hover{filter:brightness(1.08)}a:focus-visible,button:focus-visible{outline:2px solid var(--silver-hi);outline-offset:3px}
.section{padding:34px 0;border-bottom:1px solid var(--border)}.section:last-child{border-bottom:0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}.section h2{font-size:20px;line-height:1.35;margin:0;color:var(--title)}.section h3{font-size:16px;margin:0 0 8px;color:var(--silver-hi)}.section p{margin:0 0 12px}.section p:last-child{margin-bottom:0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.card p{color:var(--text)}.card .meta{font-size:12px;color:var(--muted);margin-bottom:8px}.media-slot{height:200px;background:var(--ink);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;align-items:center;justify-content:center;margin-bottom:14px}.media-slot img{width:100%;height:100%;object-fit:contain;object-position:center}.media-180{height:180px}.media-200{height:200px}.media-app{height:360px;max-width:520px;margin-inline:auto}.media-icon{height:74px;width:74px;margin:0;background:var(--panel-2)}.media-icon img{width:48px;height:48px;object-fit:contain}.feature-number{font-size:32px;line-height:1;color:var(--silver-hi);font-weight:700;letter-spacing:-.04em}.number-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.number-card{padding:16px;border-top:1px solid var(--border-strong);background:linear-gradient(180deg,rgba(232,232,232,.06),transparent)}
.shelf{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.shelf-item{min-height:150px;background:var(--panel);border:1px solid var(--border);border-left:3px solid var(--silver);border-radius:10px;padding:16px}.shelf-item small{color:var(--muted);display:block;margin-bottom:7px}.shelf-item strong{color:var(--title);display:block;margin-bottom:8px}
.timeline{position:relative;margin-left:8px;padding-left:28px}.timeline:before{content:"";position:absolute;left:5px;top:7px;bottom:7px;width:1px;background:var(--border-strong)}.timeline-item{position:relative;padding:0 0 22px}.timeline-item:before{content:"";position:absolute;left:-28px;top:7px;width:11px;height:11px;border-radius:50%;background:var(--silver-hi);box-shadow:0 0 0 5px var(--bg)}.timeline-item .status{display:inline-flex;height:26px;align-items:center;padding:0 10px;border-radius:999px;background:var(--panel-2);border:1px solid var(--border);font-size:12px;color:var(--silver-hi);margin-bottom:8px}
.memo-list{display:grid;gap:12px}.memo-item{display:grid;grid-template-columns:64px 1fr;gap:14px;padding:16px;background:var(--panel);border:1px solid var(--border);border-radius:10px}.memo-item b{color:var(--silver-hi)}
.article-list{display:grid;gap:14px}.article-item{padding:18px;background:var(--panel);border:1px solid var(--border);border-radius:12px}.article-item .kicker{font-size:12px;color:var(--muted);letter-spacing:.08em}.article-item h2,.article-item h3{margin:4px 0 10px}
.policy{max-width:900px}.policy section{padding:22px 0;border-bottom:1px solid var(--border)}.policy section:last-child{border-bottom:0}.policy ul{margin:10px 0 0;padding-left:20px}.policy li{margin:6px 0}
.faq-list{display:grid;gap:12px}.faq-item{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px}.faq-item h2{font-size:16px;margin-bottom:8px}
.notice{padding:16px 18px;border:1px solid rgba(184,90,90,.45);background:rgba(184,90,90,.08);border-radius:12px;color:var(--silver-hi)}
.site-footer{background:var(--bg-deep);border-top:1px solid var(--border-strong);color:var(--silver);padding:34px 0 70px;font-size:13px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:24px}.footer-grid h2{font-size:13px;margin:0 0 10px;color:var(--silver-hi)}.footer-grid a{display:block;color:var(--muted);padding:3px 0}.footer-grid a:hover{color:var(--silver-hi)}.footer-brand{display:flex;flex-direction:column;align-items:flex-start;gap:8px}.footer-brand strong{font-size:16px;color:var(--title)}.footer-brand span{font-size:12px;color:var(--soft)}.footer-note{padding-top:24px;margin-top:24px;border-top:1px solid var(--border)}.footer-note p{margin:0 0 8px;max-width:860px;color:var(--muted)}
.material-drawer{position:fixed;left:0;top:0;bottom:0;width:min(400px,86vw);background:#0b0b0b;z-index:320;transform:translateX(-104%);visibility:hidden;pointer-events:none;transition:transform .24s ease,visibility .24s ease;border-right:1px solid var(--border-strong);box-shadow:var(--shadow);overflow:auto}.material-drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;border-bottom:1px solid var(--border);position:sticky;top:0;background:#0b0b0b;z-index:2}.drawer-brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--title)}.drawer-close{min-width:52px;height:44px;color:var(--silver-hi);cursor:pointer}.drawer-body{padding:12px 14px 34px}.drawer-body section{padding:14px 0;border-bottom:1px solid var(--border)}.drawer-body h2{font-size:12px;color:var(--soft);letter-spacing:.14em;margin:0 0 8px}.drawer-body a{display:grid;grid-template-columns:76px 1fr;gap:10px;min-height:52px;padding:8px;border-radius:8px}.drawer-body a:hover{background:var(--panel)}.drawer-body b{font-size:14px;color:var(--silver-hi)}.drawer-body span{font-size:12px;color:var(--muted)}
.site-mask{position:fixed;inset:0;background:rgba(0,0,0,.68);z-index:280;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.site-mask.is-visible{opacity:1;visibility:visible;pointer-events:auto}
.search-layer{position:fixed;left:0;right:0;top:82px;z-index:310;visibility:hidden;opacity:0;pointer-events:none;transform:translateY(-8px);transition:.2s}.search-layer.is-open{visibility:visible;opacity:1;pointer-events:auto;transform:translateY(0)}.search-card{width:min(calc(100% - 32px),720px);margin:0 auto;background:var(--ink);border:1px solid var(--border-strong);border-radius:0 0 14px 14px;padding:20px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between}.search-head strong{color:var(--title);font-size:18px}.search-head button{height:44px;min-width:52px;cursor:pointer}.search-card p{margin:8px 0 14px;color:var(--muted)}.search-presets{display:flex;flex-wrap:wrap;gap:8px}.search-presets a{display:inline-flex;height:42px;align-items:center;padding:0 15px;background:#111;border:1px solid var(--border);border-radius:999px;color:var(--silver-hi)}
.mobile-bottom{display:none}
.prose{max-width:860px}.prose p{margin:0 0 14px}.prose h2{margin:28px 0 10px}.prose h3{margin:22px 0 8px}.quote-line{border-left:3px solid var(--mist);padding:8px 0 8px 14px;color:var(--silver-hi);margin:14px 0}.mini-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.mini-grid .card{box-shadow:none}.two-column-prose{columns:2;column-gap:32px}.two-column-prose p{break-inside:avoid}
@media (max-width:900px){
    .grid-3,.number-grid,.shelf,.footer-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1.2fr repeat(2,1fr)}
}
@media (max-width:720px){
    body{padding-top:82px;padding-bottom:calc(48px + env(safe-area-inset-bottom))}
    .case-tabs{display:none}
    .material-bar__inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px}
    .brand-link img{max-width:118px;height:24px}.brand-fallback{font-size:15px}.drawer-trigger{min-width:68px}.app-link{height:44px;padding:0 12px;font-size:13px}
    .cover{padding-top:18px}.cover .banner-slot{height:260px}.page-hero{padding-top:26px}
    .grid-3,.grid-2,.number-grid,.shelf,.footer-grid,.mini-grid{grid-template-columns:1fr}
    .media-180{height:180px}.media-200{height:200px}.media-app{height:340px}
    .section{padding:28px 0}.section-head{align-items:flex-start;flex-direction:column}
    .memo-item{grid-template-columns:52px 1fr}.two-column-prose{columns:1}
    .search-layer{top:0;bottom:0;background:var(--bg-deep);overflow:auto}.search-card{width:100%;min-height:100%;border:0;border-radius:0;padding:24px 16px}.search-head{padding-top:env(safe-area-inset-top)}
    .mobile-bottom{position:fixed;left:0;right:0;bottom:0;height:calc(48px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#0a0a0a;border-top:1px solid var(--border-strong);z-index:230;display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom a{min-width:0;display:flex;align-items:center;justify-content:center;height:48px;font-size:12px;color:var(--muted)}.mobile-bottom a.is-active{background:var(--silver);color:var(--bg);font-weight:700}
    .site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.footer-grid{gap:20px}.footer-brand{padding-bottom:4px}
}