/* ===== 设计变量（按参考站实测值） ===== */
:root{
    --primary:#0d6efd; --warning:#ffc107; --info:#0dcaf0; --success:#198754; --dark:#212529;
    --body:#212529; --muted:#6c757d; --line:#dee2e6; --bg:#ffffff; --bg-soft:#f8f9fa;
    --r-sm:6px; --r-md:12px; --r-lg:16px; --r-pill:60px;
    --sh-sm:0 2px 4px rgba(0,0,0,.075); --sh-md:0 6px 14px rgba(0,0,0,.06); --sh-lg:0 12px 24px rgba(0,0,0,.05);
    --gut:24px; --c1:1320px; --c2:1180px; --c3:900px;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--body);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;line-height:1.2}
p{margin:0 0 16px}
ul{margin:0;padding:0;list-style:none}
.md-c1{max-width:var(--c1);margin:0 auto;padding:0 12px}
.md-c2{max-width:var(--c2);margin:0 auto;padding:0 12px}
.md-c3{max-width:var(--c3);margin:0 auto;padding:0 12px}
.md-row{display:flex;flex-wrap:wrap;margin:0 -12px}
.md-row>[class*="md-c"]{padding:0 12px}
.md-3{flex:0 0 25%;max-width:25%}.md-4{flex:0 0 33.3333%;max-width:33.3333%}
.md-6{flex:0 0 50%;max-width:50%}.md-8{flex:0 0 66.6667%;max-width:66.6667%}
.md-10{flex:0 0 83.3333%;max-width:83.3333%}.md-12{flex:0 0 100%;max-width:100%}
.md-sec{padding:48px 0}.md-sec-lg{padding:80px 0}.md-tc{text-align:center}.md-mb2{margin-bottom:8px}.md-mb4{margin-bottom:24px}.md-mb5{margin-bottom:48px}
.md-h2{font-size:32px;font-weight:700;color:var(--primary);margin-bottom:24px}
.md-sub{font-size:15px;color:var(--muted);max-width:720px;margin:0 auto 40px;line-height:1.7}

/* ===== 头部：sticky 渐变条 ===== */
.md-header{position:sticky;top:0;z-index:50;box-shadow:var(--sh-sm);background:linear-gradient(to right,#ffe29f,#ffa99f)}
.md-header .md-nav{display:flex;align-items:center;justify-content:space-between;min-height:78px;max-width:var(--c1);margin:0 auto;padding:10px 12px}
.md-logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:#2b1a12;letter-spacing:.3px}
.md-logo small{display:block;font-size:11px;font-weight:600;color:#7a5c4c;letter-spacing:1.6px;text-transform:uppercase}
.md-menu{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.md-menu>li>a{display:block;padding:8px;font-size:16px;font-weight:500;color:#333;border-radius:var(--r-sm);transition:.3s}
.md-menu>li>a:hover,.md-menu>li.active>a{color:#d63384;background:rgba(255,255,255,.3)}
.md-sub-menu{position:absolute;top:100%;left:0;min-width:150px;background:#fff;border-radius:0 0 var(--r-sm) var(--r-sm);box-shadow:var(--sh-md);display:none;z-index:60}
.md-menu>li{position:relative}.md-menu>li:hover .md-sub-menu{display:block}
.md-sub-menu a{display:block;padding:8px 14px;font-size:14px;border-bottom:1px dashed #f1f3f6}
.md-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;font-size:14px;font-weight:600;color:#333;background:var(--warning);border-radius:var(--r-sm);transition:.3s}
.md-btn:hover{background:#ffb300}

/* ===== Hero：深色 + 40px 网格线 ===== */
.md-hero{position:relative;overflow:hidden;background:#1a1a1a;color:#fff;text-align:center;padding:120px 20px}
.md-hero:before{content:"";position:absolute;inset:0;opacity:.1;z-index:0;
    background-image:linear-gradient(#333 1px,transparent 1px),linear-gradient(90deg,#333 1px,transparent 1px);background-size:40px 40px}
.md-hero-in{position:relative;z-index:2;max-width:var(--c3);margin:0 auto}
.md-hero h1{font-size:44.8px;font-weight:800;letter-spacing:2px;text-transform:uppercase;margin-bottom:25px;line-height:1.2}
.md-hero p{font-size:19.2px;line-height:1.8;color:#ccc;margin-bottom:40px}
.md-hero-btns a{display:inline-block;margin:10px 15px;padding:12px 28px;border-radius:var(--r-pill);border:2px solid #4facfe;border-image:linear-gradient(135deg,#00f2fe,#4facfe) 1;background:transparent;color:#fff;font-size:16px;font-weight:700;transition:.4s}
.md-hero-btns a:hover{background:linear-gradient(to right,#4facfe,#00f2fe);color:#000;border-color:transparent}

/* ===== 关于段 + 大图 ===== */
.md-about p{font-size:16px;line-height:1.9;color:#555}
.md-figure{display:block;border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-sm);margin-top:40px;background:#eef1f6}
.md-figure mip-img,.md-figure img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}

/* ===== 1 主卡 + 3 子卡 ===== */
.md-cards{display:flex;flex-wrap:wrap;margin:0 -12px}
.md-cards>*{padding:0 12px}
.md-card{display:block;height:100%;padding:24px;border-radius:var(--r-sm);transition:.3s;margin-bottom:24px}
.md-card.main{background:var(--primary);color:#fff;box-shadow:var(--sh-md)}
.md-card.main:hover{transform:translateY(-4px);box-shadow:0 8px 16px rgba(13,110,253,.3)}
.md-card.sub{background:#fff;border:1px solid var(--line);box-shadow:var(--sh-sm)}
.md-card.sub:hover{transform:translateY(-4px);box-shadow:0 8px 16px rgba(0,0,0,.08);border-color:var(--primary)}
.md-card mip-img,.md-card img{display:block;width:160px;max-height:160px;object-fit:contain;margin-bottom:16px}
.md-card h3{font-size:16px;font-weight:700;margin-bottom:12px}
.md-card p{font-size:14.4px;line-height:1.5;margin:0;opacity:.9}

/* ===== 横向图文卡列表（news-10 式） ===== */
.md-list{display:flex;flex-direction:column;gap:24px}
.md-item{display:flex;align-items:stretch;gap:24px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;box-shadow:var(--sh-sm);transition:box-shadow .3s,transform .3s}
.md-item:hover{box-shadow:var(--sh-lg);transform:translateY(-2px)}
.md-item .thumb{flex:0 0 200px;width:200px;height:140px;overflow:hidden;border-radius:8px;background:#eef1f6}
.md-item .thumb mip-img,.md-item .thumb img{display:block;width:100%;height:100%;object-fit:cover}
.md-item .txt{flex:1 1 auto;min-width:0;display:flex;flex-direction:column;justify-content:space-between}
.md-item h3{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.45}
.md-item .desc{font-size:14px;color:var(--muted);margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.md-item .foot{display:flex;justify-content:space-between;align-items:center;font-size:14px;color:var(--muted)}
.md-item .more{padding:5px 12px;font-size:14px;color:var(--primary);border:1px solid var(--primary);border-radius:var(--r-sm)}
.md-item .more:hover{background:var(--primary);color:#fff}

/* ===== 时间线（3px 竖线 + 26px 序号圆） ===== */
.md-tl{position:relative;border-left:3px solid var(--primary);padding-left:30px;margin-top:40px}
.md-tl>li{position:relative;margin-bottom:40px;padding-left:10px}
.md-tl>li:last-child{margin-bottom:0}
.md-tl .dot{position:absolute;left:-32px;top:0;width:26px;height:26px;border-radius:50%;background:var(--primary);color:#fff;font-size:14px;font-weight:600;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(13,110,253,.3)}
.md-tl .box{background:#fff;padding:20px 24px;border-radius:var(--r-md);box-shadow:var(--sh-md);transition:.3s}
.md-tl .box:hover{box-shadow:0 10px 22px rgba(0,0,0,.08)}
.md-tl h5{font-size:16px;font-weight:600;color:#002c5f;margin-bottom:10px}
.md-tl p{font-size:15px;color:#495057;line-height:1.7;margin:0}

/* ===== 深色数据/网络段 ===== */
.md-dark{background:linear-gradient(#0a0b13 0%,#10121e 100%);color:#fff;padding:48px 0}
.md-dark .md-h2{color:#fff}
.md-figs{display:flex;flex-wrap:wrap;gap:24px;margin-top:8px}
.md-fig{flex:1 1 260px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-sm)}
.md-fig .thumb{display:block;height:170px;background:#eef1f6}
.md-fig mip-img,.md-fig img{display:block;width:100%;height:100%;object-fit:cover}
.md-fig .txt{padding:14px 16px 18px}
.md-fig h3{font-size:16px;font-weight:700;color:var(--dark);margin-bottom:6px}
.md-fig p{font-size:14px;color:var(--muted);margin:0}

/* ===== 三列卡片流 ===== */
.md-grid{display:flex;flex-wrap:wrap;gap:24px}
.md-grid .md-fig{flex:1 1 calc(33.333% - 16px);max-width:none}

/* ===== 侧栏 ===== */
.md-side{display:flex;flex-direction:column;gap:24px}
.md-side .card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-sm);padding:20px 22px}
.md-side h3{font-size:18px;font-weight:700;margin-bottom:14px;padding-left:11px;border-left:4px solid var(--primary)}
.md-hot{counter-reset:h}
.md-hot li{display:flex;gap:10px;align-items:flex-start;padding:9px 0;border-bottom:1px dashed #eef1f6}
.md-hot li:last-child{border-bottom:0}
.md-hot li:before{counter-increment:h;content:counter(h);flex:0 0 22px;height:22px;line-height:22px;text-align:center;border-radius:5px;background:#eef1f7;color:#667085;font-size:12px;font-weight:700}
.md-hot li:nth-child(-n+3):before{background:var(--primary);color:#fff}
.md-hot a{flex:1 1 auto;min-width:0;font-size:14.5px;line-height:1.55}
.md-tags{display:flex;flex-wrap:wrap;gap:8px}
.md-tags a{padding:5px 11px;border-radius:999px;background:var(--bg-soft);color:#42506a;font-size:13px}
.md-tags a:hover{background:var(--primary);color:#fff}
.md-main{display:flex;gap:32px;align-items:flex-start}
.md-main>.col-a{flex:1 1 auto;min-width:0}
.md-main>.col-b{flex:0 0 320px;width:320px}

/* ===== 分页 ===== */
.md-page{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:32px}
.md-page a,.md-page span{padding:7px 13px;border:1px solid var(--line);border-radius:var(--r-sm);background:#fff;font-size:14px;color:#42506a}
.md-page .current,.md-page a:hover{background:var(--primary);border-color:var(--primary);color:#fff}

/* ===== 正文 ===== */
.md-crumb{font-size:14px;color:var(--muted);margin-bottom:16px}
.md-art{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-sm);padding:40px}
.md-art h1{font-size:34px;line-height:1.35;margin-bottom:14px}
.md-art .meta{display:flex;flex-wrap:wrap;gap:16px;font-size:14px;color:#8d99a9;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:22px}
.md-body{font-size:17px;line-height:1.9;color:#26313f;word-break:break-word}
.md-body p{margin:0 0 16px;text-indent:2em}
.md-body h2,.md-body h3{margin:26px 0 12px;font-size:20px;padding-left:12px;border-left:4px solid var(--primary);line-height:1.4}
.md-body h3{font-size:17px}
.md-body mip-img,.md-body img{display:block;margin:18px auto;border-radius:var(--r-md);max-width:100%}
.md-body ul,.md-body ol{margin:0 0 16px;padding-left:2em}.md-body li{margin-bottom:7px}
.md-body blockquote{margin:18px 0;padding:14px 18px;background:var(--bg-soft);border-left:4px solid var(--primary);border-radius:0 var(--r-sm) var(--r-sm) 0;color:#4c5a6b}
.md-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px}
.md-body th,.md-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}.md-body th{background:var(--bg-soft)}
.md-body .caption{text-align:center;font-size:13px;color:#93a0b1;text-indent:0;margin:-8px 0 16px}
.md-pn{display:flex;gap:24px;margin-top:26px;font-size:14px}
.md-pn>div{flex:1 1 0;min-width:0;padding:14px 16px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--bg-soft)}
.md-pn em{display:block;font-style:normal;font-size:13px;color:#93a0b1;margin-bottom:4px}
.md-pn a{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== 页脚：4 列半透明圆角卡 ===== */
.md-footer{background:linear-gradient(to right,#1c1f3f,#3d0b40);color:#f8f9fa;padding:48px 0 24px}
.md-fcards{display:flex;flex-wrap:wrap;gap:24px;margin-bottom:24px}
.md-fcards>div{flex:1 1 calc(25% - 18px);min-width:0}
.md-fcard{height:100%;background:rgba(255,255,255,.1);border-radius:var(--r-lg);padding:16px;box-shadow:var(--sh-sm)}
.md-fcard h6{font-size:16px;font-weight:700;margin-bottom:8px}
.md-fcard:nth-child(1) h6,.md-fcards>div:nth-child(1) h6{color:var(--info)}
.md-fcards>div:nth-child(2) h6{color:var(--warning)}.md-fcards>div:nth-child(3) h6{color:var(--success)}.md-fcards>div:nth-child(4) h6{color:var(--primary)}
.md-fcard li{line-height:21px;font-size:14px;color:rgba(255,255,255,.5)}
.md-fcard a{color:rgba(255,255,255,.5)}.md-fcard a:hover{color:#fff}
.md-flinks{display:flex;flex-wrap:wrap;gap:10px;font-size:13px;color:rgba(255,255,255,.45)}
.md-flinks a{color:rgba(255,255,255,.45)}
.md-copy{border-top:1px solid #f8f9fa;padding-top:16px;margin-top:24px;font-size:14px;color:rgba(255,255,255,.5);text-align:center;line-height:1.9}
.md-empty{padding:44px 18px;text-align:center;color:var(--muted)}
.md-empty b{display:block;font-size:19px;color:#39445a;margin-bottom:8px}

/* ===== 响应式 ===== */
@media (max-width:991px){
    .md-nav{flex-wrap:wrap;min-height:0;padding:10px 12px 0}
    .md-menu{order:3;width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap;padding-bottom:8px;gap:0}
    .md-menu>li{flex:0 0 auto}
    .md-menu>li>a{padding:8px 10px}
    .md-btn{margin-left:auto}
    .md-sub-menu{display:none!important}
    .md-main{display:block}.md-main>.col-b{width:100%;margin-top:24px}
}
@media (max-width:767px){
    .md-hero{padding:80px 20px}.md-hero h1{font-size:32px}
    .md-hero-btns a{display:block;width:80%;margin:10px auto}
    .md-h2{font-size:24px}.md-sec{padding:32px 0}.md-sec-lg{padding:48px 0}
    .md-3,.md-4,.md-6,.md-8,.md-10{flex:0 0 100%;max-width:100%}
    .md-item{flex-direction:column}.md-item .thumb{width:100%;height:180px;flex:none}
    .md-grid .md-fig{flex:1 1 100%}
    .md-fcards>div{flex:1 1 100%}
    .md-art{padding:20px 16px}.md-art h1{font-size:24px}
    .md-tl{border-left:0;padding-left:0}.md-tl>li{padding-left:0}
    .md-tl .dot{left:0;top:-14px}.md-tl .box{margin-top:26px;padding:16px 20px}
    .md-pn{display:block}.md-pn>div{margin-bottom:12px}
}
.md-burger{display:none;align-items:center;justify-content:center;width:44px;height:38px;border:1px solid rgba(0,0,0,.15);border-radius:var(--r-sm);background:rgba(255,255,255,.5)}