/* ==================================================================
快连 kuailianxz.com.cn —— 光速跃迁 · 数据洪流主题
设计语言:深空黑底 + 电光青 + 青绿翡翠 + 全屏粒子光速 hero
+ 左侧悬浮玻璃导航 + 光速粒子流招牌 + 暗色玻璃 + 跑马灯/节点洪流
================================================================== */
:root{
--bg:#0a0e1a; /* 浅薰衣草底 */
--bg2:#0e1424; /* 抬升浅薰衣草 */
--panel:#111a2e; /* 面板 */
--panel2:#16203a; /* 面板 hover */
--neon:#22d3ee; /* 紫罗兰 */
--neon2:#34d399; /* 图标蓝 */
--deep:#0ea5e9; /* 深紫 */
--deepest:#0284c7; /* 靛蓝 */
--amber:#fbbf24; /* 品红粉 */
--ink:#e6edf7; /* 主文字 */
--muted:#94a3b8; /* 弱文字 */
--line:#24304a; /* 边线 */
--soft:#0e1424; /* 软面板 */
--grad:linear-gradient(135deg,#22d3ee 0%,#34d399 100%);
--grad-good:linear-gradient(90deg,#22d3ee 0%,#34d399 100%);
--glow:0 0 24px rgba(34,211,238,.30);
--shadow-sm:0 1px 3px rgba(15,27,45,.10);
--shadow-md:0 18px 44px rgba(15,27,45,.16);
--radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--neon);text-decoration:none}
a:hover{color:var(--neon2)}
img{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
/* ---------- 左侧悬浮玻璃导航 siderail ---------- */
.siderail{position:fixed;left:16px;top:16px;bottom:16px;z-index:80;width:224px;
background:rgba(17,26,46,.72);backdrop-filter:blur(20px);
border:1px solid var(--line);border-radius:22px;box-shadow:0 24px 70px rgba(0,0,0,.55);
display:flex;flex-direction:column;align-items:stretch;gap:4px;padding:22px 14px}
.sr-logo{display:flex;flex-direction:row;align-items:center;gap:11px;flex:0 0 auto;text-decoration:none;padding:4px 8px 18px;margin-bottom:12px;border-bottom:1px solid var(--line)}
.sr-mark{width:38px;height:38px;border-radius:10px;box-shadow:var(--glow)}
.sr-txt{display:flex;flex-direction:column;line-height:1.05}
.sr-name{font-size:18px;font-weight:800;color:var(--ink);letter-spacing:1px}
.sr-tag{font-size:8.5px;font-weight:700;letter-spacing:1.6px;color:var(--neon);text-transform:uppercase;margin-top:2px}
.sr-nav{display:flex;flex-direction:column;align-items:stretch;gap:4px;flex:1;overflow-y:auto;overflow-x:visible}
.sr-item{display:flex;align-items:center;gap:10px;padding:11px 12px;font-size:14px;font-weight:600;width:100%;
color:var(--muted);border-radius:10px;background:none;border:none;cursor:pointer;font-family:inherit;
text-align:left;transition:.16s ease;text-decoration:none;white-space:nowrap}
.sr-item:hover{color:var(--neon);background:var(--soft)}
.sr-item.on{color:var(--neon);background:rgba(34,211,238,.10);box-shadow:inset 3px 0 0 var(--neon)}
.sr-ic{width:18px;height:18px;flex:0 0 auto;display:flex;align-items:center;justify-content:center;color:inherit}
.sr-ic svg{width:18px;height:18px;display:block}
.sr-label{flex:1}
.sr-caret{font-size:12px;opacity:.5}
.sr-dd{position:relative}
.sr-dd-menu{position:absolute;left:calc(100% + 10px);top:0;min-width:200px;background:var(--panel);
border:1px solid var(--line);border-radius:12px;padding:8px;box-shadow:var(--shadow-md);
opacity:0;visibility:hidden;transform:translateX(-6px);transition:.18s ease;z-index:90}
.sr-dd:hover .sr-dd-menu,.sr-dd:focus-within .sr-dd-menu{opacity:1;visibility:visible;transform:translateX(0)}
.sr-dd-menu a{display:block;padding:9px 13px;font-size:13.5px;color:var(--ink);border-radius:8px}
.sr-dd-menu a:hover{background:var(--soft);color:var(--neon)}
.sr-cta{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;font-weight:800;
font-size:14.5px;color:#ffffff;background:var(--grad);border-radius:12px;box-shadow:var(--glow);transition:.2s;white-space:nowrap;margin-top:8px}
.sr-cta:hover{filter:brightness(1.1);box-shadow:0 0 30px rgba(34,211,238,.55);color:#ffffff}
/* ---------- 移动端顶栏 mbar ---------- */
.mbar{display:none;position:sticky;top:0;z-index:70;height:58px;background:rgba(10,14,26,.92);
backdrop-filter:blur(10px);border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:0 16px}
.mbar-toggle{font-size:22px;color:var(--ink);background:none;border:none;cursor:pointer;line-height:1}
.mbar-logo{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;font-size:18px}
.mbar-logo img{width:28px;height:28px;border-radius:7px}
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:75;opacity:0;visibility:hidden;transition:.25s}
.overlay.show{opacity:1;visibility:visible}
/* ---------- 按钮 btn(斜切速度箭头) ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;font-size:15px;
border-radius:4px;padding:13px 26px;transition:.2s ease;border:1px solid transparent;cursor:pointer;
font-family:inherit;position:relative;text-decoration:none}
.btn-primary{background:var(--grad);color:#ffffff;box-shadow:var(--glow)}
.btn-primary::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--neon2);border-radius:4px 0 0 4px}
.btn-primary:hover{filter:brightness(1.1);box-shadow:0 0 30px rgba(34,211,238,.6);transform:translateY(-2px);color:#ffffff}
.btn-outline{border-color:var(--deep);color:var(--neon);background:transparent}
.btn-outline:hover{background:rgba(14,165,233,.12)}
.btn-ghost{background:rgba(34,211,238,.1);color:var(--neon);border-color:rgba(34,211,238,.4)}
.btn-ghost:hover{background:rgba(34,211,238,.2);color:var(--neon2)}
.btn-lg{padding:16px 32px;font-size:17px}
.btn-sm{padding:8px 16px;font-size:13.5px}
.btn-block{width:100%}
/* ---------- 全屏虚化照片 hero ---------- */
.hero{position:relative;overflow:hidden;background:
radial-gradient(1000px 500px at 80% -10%,rgba(34,211,238,.16),transparent 60%),
radial-gradient(800px 460px at 8% 110%,rgba(14,165,233,.12),transparent 55%),var(--bg)}
.hero-bg{position:absolute;inset:-14px;width:calc(100% + 28px);height:calc(100% + 28px);object-fit:cover;
filter:blur(4px) brightness(1.1) saturate(1.05);z-index:0}
.hero-veil{position:absolute;inset:0;z-index:1;
background:linear-gradient(180deg,rgba(10,14,26,.5),rgba(10,14,26,.82) 58%,var(--bg))}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:46px;align-items:center;
padding-top:70px;padding-bottom:70px}
.hero .wrap.hero-center{display:flex;flex-direction:column;align-items:center;text-align:center;gap:0}
.hero-center .hero-sub{max-width:640px}
.hero-center .hero-cta{flex-direction:row;align-items:center;justify-content:center}
.hero-center .hero-platforms{justify-content:center}
.hero-warp{width:100%;max-width:760px;margin-top:26px}
.hero-warp .orbit{max-width:760px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:1px;
color:var(--neon);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.25);padding:6px 14px;
border-radius:6px;margin-bottom:20px}
.hero-kicker .dot{width:8px;height:8px;border-radius:50%;background:var(--neon);box-shadow:0 0 0 4px rgba(34,211,238,.18);
animation:pulse 1.8s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(34,211,238,.4)}50%{box-shadow:0 0 0 8px rgba(34,211,238,0)}}
.hero-title{font-size:47px;line-height:1.14;font-weight:800;letter-spacing:-.5px;margin-bottom:18px;color:var(--ink)}
.hero-title .hl{background:var(--grad-good);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;color:var(--muted);max-width:520px;margin-bottom:28px}
.hero-cta{display:flex;flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:20px}
.hero-platforms{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}
.hero-platforms a{font-size:12.5px;font-weight:600;color:var(--muted);padding:5px 13px;border:1px solid var(--line);
border-radius:6px;background:rgba(255,255,255,.05);transition:.15s}
.hero-platforms a:hover{color:var(--neon);border-color:var(--deep)}
.hero-note{font-size:13px;color:var(--muted)}
.hero-visual{position:relative;display:flex;flex-direction:column;align-items:center;gap:18px}
.hero-visual img{width:100%;max-width:460px;border-radius:16px;box-shadow:var(--shadow-md)}
.orbit{width:100%;max-width:400px;filter:drop-shadow(0 0 26px rgba(34,211,238,.28))}
.orbit-note{font-size:12.5px;color:var(--muted);text-align:center}
/* 玻璃测速卡 */
.hero-glass{background:rgba(255,255,255,.05);border:1px solid rgba(34,211,238,.22);border-radius:20px;
backdrop-filter:blur(14px);padding:30px 28px;box-shadow:var(--shadow-md)}
.speed-ring{width:130px;height:130px;margin:0 auto 22px;border-radius:50%;position:relative;
background:conic-gradient(var(--neon) 0deg,var(--deep) 280deg,rgba(34,211,238,.12) 280deg 360deg);
display:flex;align-items:center;justify-content:center}
.speed-ring::before{content:"";position:absolute;inset:7px;border-radius:50%;background:#0e1424}
.speed-ring-inner{position:relative;text-align:center;line-height:1.1}
.speed-ms{font-size:30px;font-weight:800;color:var(--neon2);display:block}
.speed-ms small{font-size:14px;font-weight:600;color:var(--muted)}
.speed-ring-inner em{font-style:normal;font-size:11px;color:var(--muted);display:block;margin-top:3px}
.speed-meta{display:flex;flex-direction:column;gap:13px;margin-bottom:20px}
.speed-row{display:grid;grid-template-columns:42px 1fr 72px;align-items:center;gap:12px;font-size:13px}
.speed-row > span:first-child{color:var(--muted)}
.speed-row b{font-weight:700;color:var(--ink);text-align:right;font-size:12.5px}
.speed-bar{height:7px;border-radius:99px;background:var(--soft);overflow:hidden}
.speed-bar i{display:block;height:100%;border-radius:99px;background:var(--grad-good);width:0;
transition:width 1.2s cubic-bezier(.2,.7,.2,1)}
.speed-foot{font-size:12px;color:var(--muted);text-align:center;border-top:1px solid var(--line);padding-top:16px}
/* ---------- 跑马灯 marquee ---------- */
.marquee{background:linear-gradient(90deg,var(--deepest),var(--deep) 50%,var(--deepest));overflow:hidden;
border-top:1px solid rgba(34,211,238,.25);border-bottom:1px solid rgba(34,211,238,.25)}
.marquee-track{display:flex;gap:0;width:max-content;animation:mq 28s linear infinite;padding:13px 0}
.marquee-track:hover{animation-play-state:paused}
.marquee-item{font-size:14px;font-weight:600;color:#ffffff;letter-spacing:.5px;padding:0 26px;white-space:nowrap}
.mq-orbit{color:var(--neon);font-size:15px}
@keyframes mq{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
/* ---------- KPI 状态带 stat-band ---------- */
.stat-band{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-cell{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
display:flex;align-items:center;gap:14px;box-shadow:var(--shadow-sm)}
.stat-ic{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
font-size:22px;background:rgba(34,211,238,.12);flex:0 0 auto}
.stat-num{font-size:19px;font-weight:800;line-height:1.15;color:var(--ink)}
.stat-lbl{font-size:12.5px;color:var(--muted)}
.stat-cell.good .stat-ic{background:rgba(34,211,238,.2)}
.stat-cell.good .stat-num{color:var(--neon)}
/* ---------- 通用 section ---------- */
.section{padding:64px 0}
.section.alt{background:var(--bg2)}
.sec-head{text-align:center;max-width:640px;margin:0 auto 40px}
.sec-head.left{text-align:left;margin-left:0}
.sec-head .kicker{display:inline-block;font-size:12px;font-weight:800;letter-spacing:2px;color:var(--neon);
text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:32px;font-weight:800;letter-spacing:-.3px;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:15.5px}
/* ---------- 玻璃功能网格 glass-grid ---------- */
.glass-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.g-card{background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
backdrop-filter:blur(8px);position:relative;overflow:hidden;transition:.2s ease}
.g-card::after{content:"";position:absolute;top:-34px;right:-34px;width:96px;height:96px;border-radius:50%;
background:radial-gradient(circle,rgba(34,211,238,.22),transparent 70%)}
.g-card:hover{border-color:rgba(34,211,238,.4);transform:translateY(-4px);box-shadow:var(--glow)}
.g-ic{font-size:30px;line-height:1;margin-bottom:14px}
.g-title{font-size:17px;font-weight:700;margin-bottom:9px;color:var(--ink)}
.g-desc{font-size:14px;color:var(--muted)}
/* ---------- 全屏虚化节点带 nodes ---------- */
.nodes{position:relative;overflow:hidden;background:var(--bg)}
.nodes .hero-bg{filter:blur(4px) brightness(1.08) saturate(1.05)}
.nodes-inner{position:relative;z-index:2;padding-top:70px;padding-bottom:70px}
.nodes-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;margin-top:6px}
.nodes-grid .sec-head{margin-bottom:0}
.node-list{list-style:none;display:flex;flex-direction:column;gap:11px}
.node-item{display:grid;grid-template-columns:88px 52px 1fr;align-items:center;gap:12px;font-size:14px;
padding:11px 14px;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:11px}
.node-item span:first-child{font-weight:600;color:var(--ink)}
.node-item span:nth-child(2){font-weight:800;color:var(--neon);text-align:right}
.node-item i{height:6px;border-radius:99px;background:var(--grad-good)}
.worldmap{width:100%;filter:drop-shadow(0 0 20px rgba(34,211,238,.16))}
.map-legend{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.map-legend span{font-size:12.5px;font-weight:600;color:var(--neon);background:rgba(34,211,238,.1);
border:1px solid rgba(34,211,238,.2);padding:4px 12px;border-radius:6px}
.light .kicker{color:var(--neon2)}
.light h2{color:var(--ink)}
.light p{color:var(--muted)}
/* ---------- 横向照片 rail photorail ---------- */
.photorail{display:flex;gap:18px;overflow-x:auto;padding-bottom:14px;scroll-snap-type:x mandatory}
.photorail::-webkit-scrollbar{height:8px}
.photorail::-webkit-scrollbar-thumb{background:var(--deep);border-radius:99px}
.ph-card{position:relative;border-radius:16px;overflow:hidden;aspect-ratio:4/5;min-width:250px;
flex:0 0 250px;display:block;scroll-snap-align:start;border:1px solid var(--line)}
.ph-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.ph-card:hover img{transform:scale(1.07)}
.ph-card span{position:absolute;left:0;right:0;bottom:0;padding:34px 16px 14px;
background:linear-gradient(180deg,transparent,rgba(10,14,26,.88));color:#e6edf7;font-weight:700;font-size:15px}
/* ---------- 光轨时间线 timeline ---------- */
.timeline{position:relative;max-width:720px;margin:0 auto;padding-left:10px}
.timeline::before{content:"";position:absolute;left:26px;top:10px;bottom:10px;width:2px;
background:linear-gradient(180deg,var(--neon),var(--deepest));box-shadow:0 0 12px rgba(34,211,238,.5)}
.tl-item{position:relative;padding:0 0 34px 74px}
.tl-item:last-child{padding-bottom:0}
.tl-node{position:absolute;left:0;top:0;width:54px;height:54px;border-radius:50%;background:#0e1424;
border:2px solid var(--neon);box-shadow:0 0 18px rgba(34,211,238,.4);display:flex;align-items:center;
justify-content:center;font-weight:800;font-size:20px;color:var(--neon2)}
.tl-body{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px 24px}
.tl-body h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.tl-body p{color:var(--muted);font-size:14.5px}
/* ---------- 平台下载卡 dl-grid ---------- */
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.dl-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:24px;display:block;
position:relative;overflow:hidden;transition:.2s ease}
.dl-card::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:var(--grad);
opacity:0;transition:.2s}
.dl-card:hover{border-color:rgba(34,211,238,.4);transform:translateY(-4px);box-shadow:var(--glow)}
.dl-card:hover::before{opacity:1}
.dl-ic{font-size:32px;line-height:1;margin-bottom:14px}
.dl-card h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px}
.dl-card p{font-size:13px;color:var(--muted)}
/* ---------- 快速入口 rel-grid ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:6px}
.rel-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
box-shadow:var(--shadow-sm);display:block;transition:.2s ease}
.rel-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4);box-shadow:var(--glow)}
.rel-card .tag{display:inline-block;font-size:11px;font-weight:800;letter-spacing:1px;color:var(--neon);
background:rgba(34,211,238,.1);padding:3px 10px;border-radius:6px;margin-bottom:12px}
.rel-card h4{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.rel-card p{color:var(--muted);font-size:13.5px}
.rel-grid.single{grid-template-columns:1fr;gap:14px}
.rel-grid.single .rel-card{display:flex;align-items:center;gap:16px;padding:18px 24px}
.rel-grid.single .rel-card:hover{transform:translateX(6px)}
.rel-grid.single .rel-card .tag{flex:0 0 auto;margin-bottom:0}
.rel-grid.single .rel-card h4{margin:0;font-size:17px;flex:0 0 auto}
.rel-grid.single .rel-card p{margin:0;font-size:14px}
.rel-grid.single .rel-card::after{content:"→";margin-left:auto;color:var(--neon);font-weight:800;font-size:18px}
/* ---------- bento(版本页复用) ---------- */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bento-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.bento-card::after{content:"";position:absolute;top:-30px;right:-30px;width:90px;height:90px;border-radius:50%;
background:radial-gradient(circle,rgba(34,211,238,.2),transparent 70%)}
.bento-card .ic{font-size:30px;line-height:1;margin-bottom:14px;color:var(--deep)}
.bento-card h3{font-size:17px;font-weight:700;margin-bottom:9px;color:var(--ink)}
.bento-card p{font-size:14px;color:var(--muted)}
/* ---------- 步骤 steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.step{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
padding:26px 24px;box-shadow:var(--shadow-sm)}
.step .n{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#ffffff;font-weight:800;
display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px;box-shadow:var(--glow)}
.step .b{display:block}
.step h3{font-size:17px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.step p{color:var(--muted);font-size:14.5px}
/* ---------- 左右图文 split ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.split.rev{direction:rtl}
.split.rev > *{direction:ltr}
.split .img{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-md)}
.split .img img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.split h2{font-size:30px;font-weight:800;letter-spacing:-.3px;margin-bottom:16px;color:var(--ink)}
.split p{color:var(--muted);font-size:15.5px;margin-bottom:14px}
.split ul{list-style:none;margin:14px 0}
.split ul li{padding:7px 0 7px 26px;position:relative;color:var(--ink);font-size:15px}
.split ul li::before{content:"✓";position:absolute;left:0;color:var(--neon);font-weight:800}
/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);
box-shadow:var(--shadow-sm)}
table{width:100%;border-collapse:collapse;min-width:560px}
th,td{padding:14px 18px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line);color:var(--ink)}
th{background:var(--soft);font-weight:700;color:var(--neon2);font-size:13px;letter-spacing:.5px}
tr:last-child td{border-bottom:none}
td:first-child{font-weight:600}
/* ---------- 提示/警示/引用 ---------- */
.tip,.callout{border-radius:12px;padding:16px 18px 16px 46px;font-size:14.5px;margin:18px 0;position:relative}
.tip{background:rgba(34,211,238,.08);border:1px solid rgba(34,211,238,.25)}
.tip::before{content:"";position:absolute;left:15px;top:15px;width:18px;height:18px;background-color:var(--deep);-webkit-mask:url("data:image/svg+xml;utf8,") no-repeat center/contain;mask:url("data:image/svg+xml;utf8,") no-repeat center/contain}
.callout{background:rgba(251,191,36,.08);border:1px solid rgba(251,191,36,.28)}
.callout::before{content:"";position:absolute;left:15px;top:15px;width:18px;height:18px;background-color:var(--deepest);-webkit-mask:url("data:image/svg+xml;utf8,") no-repeat center/contain;mask:url("data:image/svg+xml;utf8,") no-repeat center/contain}
blockquote{border-left:4px solid var(--neon);background:var(--soft);padding:16px 20px;border-radius:0 12px 12px 0;
font-size:15.5px;color:var(--ink);margin:18px 0}
/* ---------- CTA 横幅 ---------- */
.cta-band{position:relative;overflow:hidden;border-radius:20px;padding:56px 44px;text-align:center;color:var(--ink);background:linear-gradient(135deg,#0e1424 0%,#0a0e1a 58%,#070b16 100%);border:1px solid var(--line)}
.cta-band .hero-bg{filter:blur(3px) brightness(1.08) saturate(1.05)}
.cta-band .hero-veil{background:linear-gradient(180deg,rgba(10,14,26,.34),rgba(10,14,26,.72))}
.cta-band > *{position:relative;z-index:2}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:12px}
.cta-band p{opacity:.92;margin-bottom:26px;font-size:16px}
.cta-band .btn-ghost{color:#ffffff;background:var(--grad);border-color:transparent}
.cta-band .btn-ghost:hover{color:#ffffff}
/* ---------- 面包屑 / 页头 ---------- */
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--neon)}
.breadcrumb .sep{margin:0 8px;color:var(--line)}
.page-hero{background:linear-gradient(180deg,var(--bg2),var(--bg));padding:46px 0 30px;border-bottom:1px solid var(--line)}
.page-hero h1{font-size:38px;font-weight:800;letter-spacing:-.4px;margin-bottom:14px;color:var(--ink)}
.page-hero p{color:var(--muted);font-size:16px;max-width:700px}
/* ---------- 文章 ---------- */
.article-hero{background:linear-gradient(180deg,var(--bg2),var(--bg));padding:44px 0 0;border-bottom:1px solid var(--line)}
.article-hero .wrap{max-width:960px}
.article-hero h1{font-size:34px;font-weight:800;letter-spacing:-.4px;margin-bottom:14px;line-height:1.25;color:var(--ink)}
.article-hero p{color:var(--muted);font-size:16px;margin-bottom:18px}
.article-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13px;color:var(--muted);padding-bottom:22px}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-body{max-width:960px;margin:0 auto;padding:36px 24px 64px}
.article-layout{display:grid;grid-template-columns:240px 1fr;gap:44px;align-items:start}
.toc{position:sticky;top:24px;background:var(--panel);border:1px solid var(--line);border-radius:12px;
padding:20px;box-shadow:var(--shadow-sm)}
.toc h4{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--neon);margin-bottom:12px;text-transform:uppercase}
.toc a{display:block;font-size:13.5px;color:var(--muted);padding:7px 0;border-bottom:1px dashed var(--line)}
.toc a:last-child{border-bottom:none}
.toc a:hover{color:var(--neon);padding-left:4px}
.prose h2{font-size:25px;font-weight:800;margin:38px 0 16px;padding-top:10px;color:var(--ink)}
.prose h3{font-size:19px;font-weight:700;margin:28px 0 12px;color:var(--ink)}
.prose p{font-size:16px;color:#cbd5e1;margin-bottom:16px}
.prose ul,.prose ol{margin:0 0 16px 22px;color:#cbd5e1}
.prose li{margin-bottom:8px}
.prose figure{margin:22px 0}
.prose figure img{border-radius:14px;box-shadow:var(--shadow-md);width:100%}
.prose figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px}
/* ---------- 分享 ---------- */
.share{display:flex;gap:10px;margin:30px 0;flex-wrap:wrap}
.share a{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;padding:8px 14px;
border-radius:6px;border:1px solid var(--line);color:var(--muted);background:var(--panel);transition:.2s}
.share a:hover{border-color:var(--deep);color:var(--neon);transform:translateY(-2px)}
/* ---------- FAQ ---------- */
.faq-group{margin-bottom:38px}
.faq-group > h2{font-size:24px;font-weight:800;margin-bottom:18px;color:var(--ink)}
details{background:var(--panel);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;
box-shadow:var(--shadow-sm);overflow:hidden}
summary{cursor:pointer;font-weight:700;padding:18px 22px;list-style:none;position:relative;font-size:15.5px;color:var(--ink)}
summary::after{content:"+";position:absolute;right:20px;top:14px;font-size:22px;color:var(--neon);transition:.2s}
details[open] summary::after{transform:rotate(45deg)}
.faq-a{padding:0 22px 18px;color:var(--muted);font-size:15px}
/* ---------- 页脚 mastfoot ---------- */
.mastfoot{background:#070b16;color:#94a3b8;padding:56px 0 30px;border-top:1px solid #0d1528}
.mf-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:40px}
.mf-brand .wordmark{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.mf-brand .wm-mark{width:34px;height:34px;border-radius:9px}
.mf-brand .wm-text{display:flex;flex-direction:column;line-height:1.1}
.mf-brand .wm-name{font-size:19px;font-weight:800;color:#f1f5f9}
.mf-brand .wm-sub{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--neon2)}
.mf-brand p{font-size:14px;color:#94a3b8;max-width:280px}
.mf-col h4{color:#f1f5f9;font-size:14px;font-weight:700;margin-bottom:14px}
.mf-col a{display:block;color:#94a3b8;font-size:13.5px;padding:5px 0}
.mf-col a:hover{color:var(--neon2)}
.mastfoot .foot-line{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;text-align:center;
font-size:13px;color:#64748b}
/* ---------- 返回顶部 ---------- */
.backtop{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:12px;background:var(--grad);
color:#ffffff;display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer;
border:none;box-shadow:var(--glow);opacity:0;visibility:hidden;transition:.25s;z-index:40}
.backtop.show{opacity:1;visibility:visible}
/* ---------- 居中页 hero(404/search/sitemap) ---------- */
.center-hero{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 24px}
.center-hero h1{font-size:56px;font-weight:800;letter-spacing:-1px;margin-bottom:14px;color:var(--ink)}
.center-hero p{color:var(--muted);font-size:17px;margin-bottom:26px}
.search-box{display:flex;gap:10px;max-width:440px;margin:0 auto}
.search-box input{flex:1;padding:13px 18px;border:1px solid var(--line);border-radius:4px;font-size:15px;
font-family:inherit;background:var(--panel);color:var(--ink)}
.search-box button{flex:0 0 auto}
/* ---------- 站点地图 sitemap-list ---------- */
.sitemap-list{max-width:860px;margin:0 auto}
.sitemap-list h2{font-size:20px;font-weight:800;margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--neon);color:var(--ink)}
.sitemap-list a{display:inline-block;padding:5px 0;margin-right:22px;color:var(--muted);font-size:14.5px}
.sitemap-list a:hover{color:var(--neon)}
/* ---------- 中等屏:悬浮导航降级为抽屉 ---------- */
@media(max-width:1640px){
.siderail{position:fixed;left:0;top:0;bottom:0;width:256px;height:100%;border-radius:0 20px 20px 0;flex-direction:column;align-items:stretch;gap:6px;padding:22px 16px;transform:translateX(-100%);transition:transform .28s ease}
.siderail.open{transform:translateX(0)}
.sr-logo{flex-direction:row;padding:4px 0 18px;border-bottom:1px solid var(--line);margin-bottom:12px}
.sr-nav{flex-direction:column;align-items:stretch;gap:4px;overflow-y:auto;flex:1}
.sr-label{flex:1}
.sr-item{width:100%}
.sr-item.on{box-shadow:inset 3px 0 0 var(--neon)}
.sr-dd-menu{left:calc(100% + 10px);top:0;transform:translateX(-6px)}
.sr-dd:hover .sr-dd-menu,.sr-dd:focus-within .sr-dd-menu{transform:translateX(0)}
.sr-cta{margin-left:0;margin-top:14px}
.mbar{display:flex}
}
/* ---------- 响应式 ---------- */
@media(max-width:1100px){
.dl-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:960px){
.siderail{position:fixed;left:0;top:0;bottom:0;width:256px;height:auto;flex-direction:column;align-items:stretch;gap:6px;padding:22px 16px;transform:translateX(-100%);transition:transform .28s ease}
.siderail.open{transform:translateX(0)}
.sr-logo{flex-direction:row;margin-right:0;padding:4px 0 18px;border-bottom:1px solid var(--line);margin-bottom:12px}
.sr-nav{flex-direction:column;align-items:stretch;gap:4px;overflow-y:auto;flex:1}
.sr-label{flex:1}
.sr-item{width:100%}
.sr-item.on{box-shadow:inset 3px 0 0 var(--neon)}
.sr-dd-menu{left:calc(100% + 10px);top:0;transform:translateX(-6px)}
.sr-dd:hover .sr-dd-menu,.sr-dd:focus-within .sr-dd-menu{transform:translateX(0)}
.sr-cta{margin-left:0;margin-top:14px}
.mbar{display:flex}
.hero .wrap{grid-template-columns:1fr;padding-top:48px;padding-bottom:52px}
.hero .wrap.hero-center{padding-top:48px;padding-bottom:52px}
.hero-title{font-size:37px}
.hero-glass{max-width:460px}
.nodes-grid{grid-template-columns:1fr}
.split{grid-template-columns:1fr;gap:26px}
.split.rev{direction:ltr}
.article-layout{grid-template-columns:1fr}
.toc{position:static;margin-bottom:10px}
.glass-grid{grid-template-columns:repeat(2,1fr)}
.stat-band{grid-template-columns:repeat(2,1fr)}
.bento{grid-template-columns:repeat(2,1fr)}
.mf-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
.hero-title{font-size:30px}
.hero .wrap{padding-top:38px;padding-bottom:44px}
.hero-cta{width:100%}
.hero-cta .btn{width:100%}
.steps{grid-template-columns:1fr}
.glass-grid{grid-template-columns:1fr}
.stat-band{grid-template-columns:1fr 1fr}
.bento{grid-template-columns:1fr}
.dl-grid{grid-template-columns:1fr}
.rel-grid{grid-template-columns:1fr}
.rel-grid.single .rel-card{flex-wrap:wrap}
.mf-grid{grid-template-columns:1fr}
.timeline::before{left:22px}
.tl-item{padding-left:62px}
.tl-node{width:46px;height:46px;font-size:17px}
}