/* MW4 推广子站 · 黑/炭黑 + 黄；系统字体栈，无外部字体与 CDN 依赖 */
:root{--bg:#08090b;--panel:#12151a;--panel2:#171b22;--line:rgba(255,255,255,.09);--text:#e8ecf2;
--muted:#9aa4b2;--yellow:#ffd247;--yellow-dim:rgba(255,210,71,.14);--radius:14px;--max:1200px}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);line-height:1.7;
font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 20px;width:100%}
.site-header{position:sticky;top:0;z-index:20;background:rgba(8,9,11,.92);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800}
.brand-dot{width:9px;height:9px;border-radius:50%;background:var(--yellow);box-shadow:0 0 12px var(--yellow)}
.nav{display:flex;gap:18px;font-size:14px;color:var(--muted)}
.nav a:hover{color:var(--text)}
@media(max-width:860px){.nav{display:none}}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:12px;
border:1px solid var(--line);background:var(--panel2);color:var(--text);font-weight:700;font-size:14px;cursor:pointer;transition:.15s}
.btn:hover{border-color:#454c58}
.btn.primary{background:var(--yellow);border-color:var(--yellow);color:#111}
.btn.primary:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent}
.hero{padding:clamp(34px,6vw,72px) 0 clamp(24px,4vw,44px);border-bottom:1px solid var(--line);
background:radial-gradient(900px 380px at 12% -10%,rgba(255,210,71,.10),transparent 62%)}
.state{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:800;color:var(--yellow);
border:1px solid var(--yellow-dim);background:rgba(255,210,71,.06);padding:6px 12px;border-radius:999px}
h1{font-size:clamp(30px,5.4vw,52px);line-height:1.16;margin:16px 0 12px;letter-spacing:-.02em}
.lede{font-size:clamp(15px,1.6vw,18px);color:var(--muted);max-width:660px;margin:0 0 24px}
.actions{display:flex;flex-wrap:wrap;gap:12px}
section{padding:clamp(30px,5vw,60px) 0;border-bottom:1px solid var(--line)}
h2{font-size:clamp(21px,2.6vw,30px);margin:0 0 8px;letter-spacing:-.01em}
h3{font-size:17px;margin:0 0 6px}
.eyebrow{color:var(--muted);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.sub{color:var(--muted);margin:0 0 26px;max-width:760px}
.grid{display:grid;gap:16px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:980px){.g4{grid-template-columns:repeat(2,minmax(0,1fr))}.g3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:block;transition:.16s}
a.card:hover{border-color:#454c58;background:var(--panel2);transform:translateY(-2px)}
.card p{color:var(--muted);margin:6px 0 0;font-size:14.5px}
.tag{display:inline-block;font-size:11.5px;font-weight:700;color:var(--yellow);border:1px solid var(--yellow-dim);
background:rgba(255,210,71,.06);padding:3px 9px;border-radius:999px;margin-bottom:10px}
.timeline{list-style:none;margin:0;padding:0}
.timeline li{position:relative;padding:0 0 22px 30px;border-left:1px solid var(--line);margin-left:6px}
.timeline li:last-child{border-left-color:transparent;padding-bottom:0}
.timeline li::before{content:"";position:absolute;left:-5px;top:7px;width:9px;height:9px;border-radius:50%;background:var(--yellow)}
.timeline b{display:block;font-size:15.5px}
.timeline .when{color:var(--yellow);font-size:13px;font-weight:700}
.timeline .note{color:var(--muted);font-size:14px;margin-top:3px}
.faq details{border:1px solid var(--line);border-radius:12px;background:var(--panel);margin-bottom:10px;overflow:hidden}
.faq summary{cursor:pointer;padding:15px 18px;font-weight:700;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--yellow);font-weight:800}
.faq details[open] summary::after{content:"\2212"}
.faq details p{margin:0;padding:0 18px 16px;color:var(--muted);font-size:14.5px}
.check{list-style:none;padding:0;margin:0}
.check li{position:relative;padding:7px 0 7px 28px;color:var(--muted);border-bottom:1px solid rgba(255,255,255,.045)}
.check li:last-child{border-bottom:0}
.check li::before{content:"\2610";position:absolute;left:2px;color:var(--yellow);font-weight:800}
.note-box{border:1px solid var(--yellow-dim);background:rgba(255,210,71,.05);border-radius:12px;padding:15px 18px;color:var(--muted);font-size:14.5px;margin:18px 0}
.breadcrumb{font-size:13px;color:var(--muted);padding:18px 0 0}
.breadcrumb a:hover{color:var(--text)}
.site-footer{padding:34px 0 96px;color:var(--muted);font-size:13.5px}
.site-footer a{color:var(--text)}
.dock{position:fixed;left:0;right:0;bottom:0;z-index:30;display:none;background:rgba(8,9,11,.96);
border-top:1px solid var(--line);padding:8px 10px calc(8px + env(safe-area-inset-bottom))}
.dock-inner{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.dock a{display:flex;align-items:center;justify-content:center;min-height:44px;border-radius:11px;font-size:13.5px;
font-weight:700;background:var(--panel2);border:1px solid var(--line)}
.dock a.primary{background:var(--yellow);color:#111;border-color:var(--yellow)}
@media(max-width:760px){.dock{display:block}}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{text-align:left;padding:11px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--yellow);font-weight:700;white-space:nowrap}
@media(max-width:640px){th,td{display:block;border-bottom:0;padding:4px 0}tr{display:block;padding:10px 0;border-bottom:1px solid var(--line)}}