/* iKuuu 官网样式 - 深色科技风 */
:root{--bg:#0a0f1e;--bg2:#0e1628;--card:#121c30;--card2:#16223a;--line:rgba(148,163,184,.16);--txt:#e6edf7;--muted:#93a3ba;--accent:#22d3ee;--accent2:#38bdf8;--grad:linear-gradient(135deg,#22d3ee,#3b82f6);--green:#34d399;--amber:#fbbf24;--red:#f87171;--radius:14px;--shadow:0 10px 40px rgba(2,6,18,.5)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--txt);line-height:1.65;font-size:16px;overflow-x:hidden}
a{color:var(--accent);text-decoration:none;transition:.2s}
a:hover{color:#7dd3fc}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 22px}
.hidden{display:none}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}

/* 顶部导航 */
.topbar{position:sticky;top:0;z-index:100;background:rgba(10,15,30,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:26px;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--txt)}
.brand img{width:32px;height:32px;border-radius:8px}
.brand span{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;gap:20px;margin-left:auto;align-items:center;flex-wrap:wrap}
.nav-links a{color:var(--muted);font-size:14.5px;font-weight:600;padding:6px 2px}
.nav-links a:hover,.nav-links a.active{color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:700;font-size:15px;padding:11px 22px;cursor:pointer;border:1px solid transparent;white-space:nowrap}
.btn-primary{background:var(--grad);color:#05121a}
.btn-primary:hover{color:#05121a;filter:brightness(1.1);box-shadow:0 8px 24px rgba(34,211,238,.35)}
.btn-outline{background:transparent;color:var(--accent);border-color:rgba(34,211,238,.5)}
.btn-outline:hover{background:rgba(34,211,238,.1)}
.btn-lg{padding:14px 30px;font-size:16.5px}
.btn-sm{padding:8px 16px;font-size:13.5px}
.btn-full{width:100%}

/* Hero */
.hero{position:relative;padding:64px 0 56px;background:radial-gradient(1200px 500px at 20% -10%,rgba(59,130,246,.22),transparent 60%),radial-gradient(900px 420px at 85% 0,rgba(34,211,238,.16),transparent 55%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:46px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:6px;background:rgba(34,211,238,.12);border:1px solid rgba(34,211,238,.3);color:#7dd3fc;font-size:13px;font-weight:700;padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:46px;line-height:1.18;font-weight:900;letter-spacing:-.5px;margin-bottom:18px}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:17.5px;color:var(--muted);margin-bottom:26px;max-width:520px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap}
.hero-stats .st b{display:block;font-size:24px;color:var(--txt)}
.hero-stats .st span{font-size:13px;color:var(--muted)}

/* 客户端模拟器 */
.sim{position:relative}
.sim-window{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.sim-titlebar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--card2);border-bottom:1px solid var(--line)}
.sim-dots{display:flex;gap:6px}
.sim-dots i{width:11px;height:11px;border-radius:50%;display:block}
.sim-dots i:nth-child(1){background:#f87171}.sim-dots i:nth-child(2){background:#fbbf24}.sim-dots i:nth-child(3){background:#34d399}
.sim-titlebar .t{margin-left:8px;font-size:13px;color:var(--muted)}
.sim-body{padding:20px}
.sim-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.sim-brand img{width:34px;height:34px;border-radius:8px}
.sim-brand b{font-size:17px}
.sim-connect{display:flex;flex-direction:column;align-items:center;gap:10px;padding:22px;background:var(--bg2);border-radius:12px;border:1px solid var(--line);margin-bottom:18px}
.power-btn{width:96px;height:96px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:30px;box-shadow:0 0 0 10px rgba(34,211,238,.12),0 0 40px rgba(34,211,238,.4);position:relative}
.power-btn svg{width:40px;height:40px}
.sim-status{font-size:14px;color:var(--green);font-weight:700}
.sim-status.off{color:var(--muted)}
.sim-list{display:flex;flex-direction:column;gap:10px}
.sim-node{display:flex;align-items:center;gap:12px;padding:12px 14px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;font-size:14px}
.sim-node .flag{font-size:20px}
.sim-node .nm{flex:1;font-weight:600}
.sim-node .ping{color:var(--green);font-weight:700;font-size:13px}
.sim-node.active{border-color:rgba(34,211,238,.5);background:rgba(34,211,238,.06)}
.sim-foot{display:flex;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}

/* 区块通用 */
section{padding:60px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 42px}
.sec-head h2{font-size:34px;font-weight:900;letter-spacing:-.3px;margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:16px}
.tag{display:inline-block;background:rgba(34,211,238,.12);color:#7dd3fc;font-size:13px;font-weight:700;padding:5px 14px;border-radius:999px;margin-bottom:14px;letter-spacing:.5px}

/* 公告 */
.announce{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0}
.announce .container{display:flex;align-items:center;gap:14px}
.announce .ic{font-size:22px}
.announce .txt{flex:1;font-size:14.5px;color:var(--muted)}
.announce .txt a{color:var(--accent);font-weight:600}

/* 功能 */
.features{background:var(--bg2)}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.feat-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4);box-shadow:var(--shadow)}
.feat-card .ic{width:50px;height:50px;border-radius:12px;background:rgba(34,211,238,.12);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.feat-card h3{font-size:19px;margin-bottom:10px}
.feat-card p{color:var(--muted);font-size:14.5px}

/* 对比表格 */
.cmp{overflow-x:auto}
.cmp table{width:100%;border-collapse:collapse;min-width:640px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.cmp th,.cmp td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line);font-size:14.5px}
.cmp th{background:var(--card2);font-weight:700;color:var(--txt)}
.cmp th:first-child,.cmp td:first-child{text-align:left}
.cmp td.yes{color:var(--green);font-weight:700}
.cmp td.no{color:var(--muted)}
.cmp tr.self td{background:rgba(34,211,238,.06)}
.cmp tr.self td:first-child{font-weight:800;color:var(--accent)}

/* 新闻 Tab */
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:28px}
.tab{background:var(--card);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:8px 20px;font-size:14px;font-weight:600}
.tab.active,.tab:hover{background:var(--grad);color:#05121a;border-color:transparent}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s}
.news-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.4)}
.news-card .cover{aspect-ratio:16/9;background:linear-gradient(135deg,#1e3a5f,#0e1628);display:flex;align-items:center;justify-content:center;font-size:40px}
.news-card .bd{padding:18px}
.news-card .cat{font-size:12px;color:var(--accent);font-weight:700}
.news-card h3{font-size:16px;margin:8px 0;line-height:1.4}
.news-card h3 a{color:var(--txt)}
.news-card h3 a:hover{color:var(--accent)}
.news-card .meta{font-size:12.5px;color:var(--muted)}
.tab-input{position:absolute;opacity:0;pointer-events:none}
.tab-input:checked+label{background:var(--grad);color:#05121a;border-color:transparent}
.tab-panels .panel{display:none}
#nt1:checked~.tab-panels #p1,#nt2:checked~.tab-panels #p2,#nt3:checked~.tab-panels #p3{display:grid}

/* 用户评论 */
.reviews{background:var(--bg2)}
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.rev-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.rev-stars{color:var(--amber);font-size:16px;margin-bottom:12px}
.rev-card p{color:var(--txt);font-size:14.5px;margin-bottom:16px}
.rev-user{display:flex;align-items:center;gap:10px}
.rev-avatar{width:40px;height:40px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;font-weight:800;color:#05121a}
.rev-user b{display:block;font-size:14px}
.rev-user span{font-size:12.5px;color:var(--muted)}

/* 下载区 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.25s}
.dl-card:hover{transform:translateY(-4px);border-color:rgba(34,211,238,.5)}
.dl-card .ic{font-size:42px;margin-bottom:14px}
.dl-card h3{font-size:16px;margin-bottom:6px}
.dl-card p{font-size:12.5px;color:var(--muted);margin-bottom:16px}
.dl-card .btn{width:100%}

/* 信任背书 */
.trust{background:var(--bg2)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.trust-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.trust-item .ic{font-size:32px;margin-bottom:10px}
.trust-item b{display:block;font-size:15px;margin-bottom:6px}
.trust-item span{font-size:13px;color:var(--muted)}

/* 应用场景 */
.use-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.use-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.use-card .ic{font-size:30px;margin-bottom:14px}
.use-card h3{font-size:17px;margin-bottom:10px}
.use-card p{color:var(--muted);font-size:14.5px}

/* FAQ */
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:18px 20px;font-weight:700;font-size:16px;list-style:none;display:flex;align-items:center;justify-content:space-between}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{font-size:20px;color:var(--accent);transition:.2s}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-body{padding:0 20px 20px;color:var(--muted);font-size:14.5px}
.faq-body ol,.faq-body ul{padding-left:20px;margin:10px 0}
.faq-body li{margin:6px 0}
.faq-cat{margin-bottom:34px}
.faq-cat h3{font-size:22px;margin-bottom:16px;padding-left:12px;border-left:4px solid var(--accent)}

/* 底部 CTA */
.cta{background:radial-gradient(900px 400px at 50% 0,rgba(34,211,238,.2),transparent 60%),var(--bg2);text-align:center}
.cta h2{font-size:34px;font-weight:900;margin-bottom:14px}
.cta p{color:var(--muted);margin-bottom:26px;font-size:16px}
.cta .btn{margin:0 6px}

/* 页脚 */
footer{background:#070b16;border-top:1px solid var(--line);padding:48px 0 30px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;margin-bottom:34px}
.foot-col h4{font-size:15px;margin-bottom:16px;color:var(--txt)}
.foot-col a{display:block;color:var(--muted);font-size:14px;margin-bottom:10px}
.foot-col a:hover{color:var(--accent)}
.foot-col p{color:var(--muted);font-size:13.5px;margin-bottom:12px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.foot-brand img{width:30px;height:30px;border-radius:8px}
.foot-brand b{font-size:18px}
.friendlinks{border-top:1px solid var(--line);padding-top:20px;margin-bottom:20px}
.friendlinks .fl-t{font-size:13px;color:var(--muted);margin-bottom:10px}
.friendlinks a{display:inline-block;font-size:13px;color:#5b6b82;margin:0 14px 8px 0}
.friendlinks a:hover{color:var(--accent)}
.copyright{text-align:center;font-size:13px;color:#5b6b82;padding-top:20px;border-top:1px solid var(--line)}
.copyright a{color:#5b6b82}

/* 面包屑 */
.crumbs{background:var(--bg2);border-bottom:1px solid var(--line);padding:14px 0;font-size:13.5px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px}
.crumbs li{color:var(--muted)}
.crumbs li+li::before{content:"/";margin-right:6px;color:#3b4a63}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--accent)}

/* 文章 */
.article{padding:44px 0}
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:40px}
.article-main{max-width:760px}
.article-head h1{font-size:32px;font-weight:900;line-height:1.35;margin-bottom:16px}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13.5px;color:var(--muted);margin-bottom:22px}
.article-cover{aspect-ratio:16/8;border-radius:var(--radius);background:linear-gradient(135deg,#1e3a5f,#0e1628);display:flex;align-items:center;justify-content:center;font-size:70px;margin-bottom:26px;border:1px solid var(--line)}
.article-body{font-size:16.5px;line-height:1.85;color:#cbd5e1}
.article-body p{margin-bottom:18px}
.article-body h2{font-size:24px;font-weight:800;margin:32px 0 14px;color:var(--txt);padding-left:12px;border-left:4px solid var(--accent)}
.article-body h3{font-size:19px;font-weight:700;margin:24px 0 10px;color:var(--txt)}
.article-body img{border-radius:12px;margin:18px 0;border:1px solid var(--line)}
.article-body figure{margin:18px 0}
.article-body figcaption{font-size:12.5px;color:var(--muted);text-align:center;margin-top:8px}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden;font-size:14.5px}
.article-body th,.article-body td{padding:12px 14px;border:1px solid var(--line);text-align:left}
.article-body th{background:var(--card2);color:var(--txt)}
.article-body blockquote{border-left:4px solid var(--accent);background:var(--card);padding:16px 20px;border-radius:0 10px 10px 0;margin:20px 0;color:var(--muted)}
.article-body ul,.article-body ol{padding-left:24px;margin:14px 0}
.article-body li{margin:8px 0}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:36px;padding-top:22px;border-top:1px solid var(--line)}
.article-nav a{font-size:14px;color:var(--muted)}
.article-nav a:hover{color:var(--accent)}
.sidebar h3{font-size:16px;margin-bottom:14px;padding-left:10px;border-left:3px solid var(--accent)}
.sidebar .widget{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;margin-bottom:22px}
.sidebar .hot-item{display:flex;gap:12px;margin-bottom:14px;align-items:center}
.sidebar .hot-item .n{width:28px;height:28px;border-radius:8px;background:var(--bg2);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;color:var(--accent)}
.sidebar .hot-item a{color:var(--txt);font-size:14px;line-height:1.4}
.sidebar .hot-item a:hover{color:var(--accent)}
.sidebar .cat-item a{display:block;color:var(--muted);font-size:14px;padding:8px 0;border-bottom:1px dashed var(--line)}
.sidebar .cat-item:last-child a{border-bottom:none}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.rel-card{background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.rel-card .c{aspect-ratio:16/9;background:linear-gradient(135deg,#1e3a5f,#0e1628);display:flex;align-items:center;justify-content:center;font-size:34px}
.rel-card .bd{padding:14px}
.rel-card a{color:var(--txt);font-size:14px;line-height:1.4}
.rel-card a:hover{color:var(--accent)}
.back-list{display:inline-flex;margin-bottom:20px;font-size:14px;color:var(--accent)}

/* 404 */
.err{min-height:calc(100vh - 66px);display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.err h1{font-size:120px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1}
.err h2{font-size:28px;margin:16px 0 12px}
.err p{color:var(--muted);margin-bottom:28px}

/* 下载页 */
.dl-hero{text-align:center;padding:56px 0 30px}
.dl-hero h1{font-size:40px;font-weight:900;margin-bottom:14px}
.dl-hero p{color:var(--muted);max-width:640px;margin:0 auto 24px}
.dl-soft{margin-top:36px}
.soft-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:30px;display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.soft-card .ic{font-size:64px}
.soft-card .info{flex:1;min-width:220px}
.soft-card .info h2{font-size:24px;margin-bottom:8px}
.soft-card .info p{color:var(--muted);font-size:14px}
.soft-card .ver{font-size:13px;color:var(--muted);margin-bottom:6px}
.soft-meta{display:flex;gap:20px;flex-wrap:wrap;margin-top:16px}
.soft-meta span{font-size:13px;color:var(--muted)}

/* 响应式 */
@media(max-width:960px){.hero-grid{grid-template-columns:1fr}.hero h1{font-size:36px}.feat-grid,.news-grid,.rev-grid,.use-grid,.trust-grid{grid-template-columns:repeat(2,1fr)}.dl-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.sidebar{order:2}.foot-grid{grid-template-columns:1fr 1fr}.related-grid{grid-template-columns:1fr}}
@media(max-width:600px){.nav-links{display:none}.feat-grid,.news-grid,.rev-grid,.use-grid,.trust-grid,.dl-grid{grid-template-columns:1fr}.hero h1{font-size:30px}.sec-head h2{font-size:27px}.foot-grid{grid-template-columns:1fr}.hero-stats{gap:18px}}