/* iKuuu 官网全局样式 - 深海军蓝 + 青色渐变主题 */
:root{
  --bg:#0b1120; --bg2:#0e1628; --surface:#131c30; --surface2:#182238;
  --border:#233152; --border2:#2d3d63;
  --txt:#e8edf7; --muted:#9aa8c7; --muted2:#718096;
  --cyan:#22d3ee; --emerald:#34d399; --indigo:#818cf8;
  --grad:linear-gradient(135deg,#22d3ee 0%,#34d399 100%);
  --grad2:linear-gradient(135deg,#818cf8 0%,#22d3ee 100%);
  --shadow:0 20px 50px -18px rgba(2,8,23,.7);
  --radius:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
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:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--cyan);text-decoration:none;transition:.2s}
a:hover{color:var(--emerald)}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
.section{padding:76px 0}
.section-head{text-align:center;max-width:760px;margin:0 auto 48px}
.section-head .kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--cyan);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.25);padding:6px 16px;border-radius:999px;margin-bottom:18px}
.section-head h2{font-size:34px;line-height:1.3;font-weight:800;margin-bottom:14px;color:#fff}
.section-head p{color:var(--muted);font-size:16px}
h1,h2,h3,h4{line-height:1.3;font-weight:800;color:#fff}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:100;background:rgba(11,17,32,.86);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff}
.nav-logo img{width:34px;height:34px;border-radius:8px}
.nav-logo b{color:var(--emerald)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:var(--muted);font-size:14.5px;font-weight:500;position:relative}
.nav-links a:hover{color:#fff}
.nav-links a.act{color:#fff}
.nav-cta{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:10px;font-weight:700;font-size:15px;line-height:1.2;cursor:pointer;border:none;transition:.2s}
.btn-primary{background:var(--grad);color:#06202a}
.btn-primary:hover{color:#06202a;filter:brightness(1.1);transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1px solid var(--border2);color:var(--txt)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-lg{padding:15px 32px;font-size:16px}
.btn-sm{padding:8px 16px;font-size:13.5px;border-radius:8px}
.btn-block{width:100%}

/* Hero */
.hero{position:relative;padding:72px 0 60px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 20% 0%,rgba(34,211,238,.14),transparent),radial-gradient(ellipse 50% 40% at 85% 20%,rgba(129,140,248,.12),transparent);pointer-events:none}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;position:relative}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.3);color:var(--emerald);font-size:13px;font-weight:700;padding:7px 14px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:46px;font-weight:900;margin-bottom:18px;letter-spacing:-.5px}
.hero p.lead{color:var(--muted);font-size:18px;max-width:540px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-stats .stat b{display:block;font-size:28px;font-weight:900;color:#fff}
.hero-stats .stat span{color:var(--muted);font-size:13px}

/* 客户端模拟器 */
.sim{position:relative;background:linear-gradient(160deg,#151f38,#0d1426);border:1px solid var(--border2);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.sim-titlebar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--border)}
.sim-dot{width:11px;height:11px;border-radius:50%}
.sim-titlebar .t{flex:1;text-align:center;font-size:12.5px;color:var(--muted)}
.sim-body{padding:18px}
.sim-status{display:flex;align-items:center;gap:12px;background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.3);border-radius:12px;padding:14px 16px;margin-bottom:16px}
.sim-status .ring{width:44px;height:44px;border-radius:50%;border:3px solid var(--emerald);display:flex;align-items:center;justify-content:center;flex:none}
.sim-status .ring i{width:14px;height:14px;background:var(--emerald);border-radius:50%;box-shadow:0 0 12px var(--emerald)}
.sim-status .lbl b{display:block;font-size:14.5px;color:#fff}
.sim-status .lbl span{font-size:12px;color:var(--muted)}
.sim-status .ping{margin-left:auto;text-align:right}
.sim-status .ping b{font-size:20px;color:var(--emerald);font-weight:900}
.sim-status .ping span{display:block;font-size:11px;color:var(--muted)}
.sim-block{margin-bottom:14px}
.sim-block h4{font-size:13px;color:var(--muted);font-weight:600;margin-bottom:8px;text-transform:uppercase;letter-spacing:.5px}
.sim-node{display:flex;align-items:center;gap:10px;padding:11px 14px;background:var(--surface);border:1px solid var(--border);border-radius:10px;margin-bottom:8px;font-size:13.5px}
.sim-node.act{border-color:var(--emerald);background:rgba(52,211,153,.07)}
.sim-node .flag{width:26px;height:18px;border-radius:4px;flex:none;display:flex;align-items:center;justify-content:center;font-size:12px}
.sim-node .name{color:var(--txt);font-weight:600}
.sim-node .bar{margin-left:auto;height:5px;width:90px;background:var(--border);border-radius:99px;overflow:hidden}
.sim-node .bar i{display:block;height:100%;background:var(--grad);border-radius:99px}
.sim-node .ms{width:42px;text-align:right;font-size:12px;color:var(--muted)}
.sim-connect{display:block;text-align:center;width:100%;padding:14px;background:var(--grad);color:#06202a;font-weight:800;font-size:15px;border-radius:12px}
.sim-connect:hover{color:#06202a;filter:brightness(1.08)}
.sim-speed{display:flex;gap:10px;margin-top:14px}
.sim-speed .cell{flex:1;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px 6px}
.sim-speed .cell b{display:block;font-size:15px;color:#fff}
.sim-speed .cell span{font-size:11px;color:var(--muted)}

/* 卡片网格 */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-5{grid-template-columns:repeat(5,1fr)}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:var(--border2);box-shadow:var(--shadow)}
.card .ico{width:52px;height:52px;border-radius:12px;background:var(--grad2);display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:24px;color:#fff}
.card h3{font-size:18px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}
.card .num{font-size:13px;color:var(--cyan);font-weight:800;letter-spacing:1px}

/* 公告区 */
.notice{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;display:flex;align-items:center;gap:14px}
.notice .tag{background:var(--grad);color:#06202a;font-weight:800;font-size:12.5px;padding:5px 12px;border-radius:6px;flex:none}
.notice .txt{color:var(--muted);font-size:14.5px}
.notice .txt a{color:var(--cyan);font-weight:600}

/* 对比表 */
.cmp{width:100%;border-collapse:collapse;background:var(--surface);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.cmp th,.cmp td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--border);font-size:14.5px}
.cmp th{background:var(--surface2);color:var(--muted);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.5px}
.cmp td:first-child{font-weight:700;color:#fff}
.cmp .yes{color:var(--emerald);font-weight:700}
.cmp .no{color:var(--muted2)}
.cmp .self{background:rgba(34,211,238,.06)}
.cmp .self td:first-child{color:var(--cyan)}
.cmp-wrap{overflow-x:auto}

/* 新闻 Tab */
.tabs{display:flex;gap:10px;margin-bottom:26px;flex-wrap:wrap}
.tab{display:inline-flex;padding:10px 20px;border-radius:999px;background:var(--surface);border:1px solid var(--border);color:var(--muted);font-size:14px;font-weight:600;cursor:pointer}
.tab:hover{color:#fff}
.tab.act{background:var(--grad);color:#06202a;border-color:transparent}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);border-color:var(--border2)}
.news-card .thumb{height:150px;background:var(--grad2);display:flex;align-items:center;justify-content:center;font-size:40px}
.news-card .body{padding:18px}
.news-card .meta{font-size:12px;color:var(--muted2);margin-bottom:8px}
.news-card h3{font-size:15.5px;line-height:1.4;margin-bottom:8px}
.news-card h3 a{color:#fff}
.news-card h3 a:hover{color:var(--cyan)}
.news-card p{color:var(--muted);font-size:13.5px}

/* 评论 */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.review .stars{color:#fbbf24;letter-spacing:2px;margin-bottom:10px;font-size:15px}
.review p{color:var(--muted);font-size:14.5px;margin-bottom:16px}
.review .user{display:flex;align-items:center;gap:12px}
.review .avatar{width:42px;height:42px;border-radius:50%;background:var(--grad2);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:16px}
.review .user b{display:block;font-size:14px;color:#fff}
.review .user span{font-size:12px;color:var(--muted2)}

/* 下载卡片 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.25s;display:flex;flex-direction:column;gap:12px}
.dl-card:hover{transform:translateY(-4px);border-color:var(--border2)}
.dl-card .os{width:54px;height:54px;margin:0 auto;border-radius:14px;background:var(--grad2);display:flex;align-items:center;justify-content:center;font-size:26px}
.dl-card h3{font-size:15.5px}
.dl-card .ver{font-size:12px;color:var(--muted2)}
.dl-card .btn{margin-top:auto}

/* 信任背书 */
.trust{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.trust-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;text-align:center}
.trust-item .ico{font-size:34px;margin-bottom:12px}
.trust-item b{display:block;font-size:16px;color:#fff;margin-bottom:6px}
.trust-item span{font-size:13px;color:var(--muted)}

/* 应用场景 */
.scene{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.scene .ico{font-size:30px;margin-bottom:12px}
.scene h3{font-size:17px;margin-bottom:8px}
.scene p{color:var(--muted);font-size:14px}

/* FAQ */
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-item summary{padding:18px 22px;cursor:pointer;font-weight:700;color:#fff;font-size:16px;list-style:none;display:flex;align-items:center;justify-content:space-between}
.faq-item summary::after{content:"+";font-size:22px;color:var(--cyan);transition:.2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{padding:0 22px 20px;color:var(--muted);font-size:14.5px}
.faq-answer ol{margin:10px 0 0 20px}
.faq-answer ol li{margin-bottom:8px}
.faq-answer h4{color:var(--cyan);font-size:14.5px;margin:12px 0 6px}

/* CTA */
.cta{position:relative;background:var(--grad2);border-radius:24px;padding:56px 40px;text-align:center;overflow:hidden}
.cta h2{font-size:32px;margin-bottom:14px}
.cta p{color:rgba(255,255,255,.85);margin-bottom:26px;font-size:16px}
.cta .btn-primary{background:#fff;color:#1e293b}

/* 页脚 */
.footer{background:var(--bg2);border-top:1px solid var(--border);padding:56px 0 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer .brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;color:#fff;margin-bottom:14px}
.footer .brand img{width:32px;height:32px;border-radius:8px}
.footer .about{color:var(--muted);font-size:13.5px;max-width:300px}
.footer h4{font-size:14px;color:#fff;margin-bottom:16px}
.footer-links a{display:block;color:var(--muted);font-size:13.5px;margin-bottom:10px}
.footer-links a:hover{color:var(--cyan)}
.friend-links{border-top:1px solid var(--border);padding:22px 0;display:flex;flex-wrap:wrap;gap:6px 20px}
.friend-links .fl-tag{color:var(--muted2);font-size:13px}
.friend-links a{color:var(--muted);font-size:13px}
.friend-links a:hover{color:var(--cyan)}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;color:var(--muted2);font-size:12.5px}
.footer-bottom a{color:var(--muted2);font-size:12.5px}

/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--muted2);padding:18px 0 0;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb span{color:var(--muted2)}

/* 页面头 */
.page-head{padding:48px 0 24px}
.page-head h1{font-size:38px;margin-bottom:12px}
.page-head p{color:var(--muted);font-size:17px;max-width:720px}

/* 文章 */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.article{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:36px}
.article .art-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--muted2);margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.article .art-meta .cat{color:var(--cyan);font-weight:700}
.article h1{font-size:28px;line-height:1.4;margin-bottom:20px}
.article h2{font-size:21px;margin:28px 0 14px;padding-left:14px;border-left:4px solid var(--cyan)}
.article p{margin-bottom:16px;color:#cbd5e1}
.article figure{margin:22px 0;text-align:center}
.article figure img{border-radius:12px;margin:0 auto}
.article figcaption{font-size:12.5px;color:var(--muted2);margin-top:8px}
.article blockquote{border-left:4px solid var(--emerald);background:rgba(52,211,153,.06);padding:16px 20px;border-radius:0 10px 10px 0;margin:20px 0;color:var(--muted);font-style:italic}
.article .toc{background:var(--surface2);border:1px solid var(--border);border-radius:12px;padding:18px 22px;margin-bottom:26px}
.article .toc h4{font-size:14px;color:var(--cyan);margin-bottom:10px}
.article .toc a{display:block;color:var(--muted);font-size:14px;padding:4px 0}
.article .toc a:hover{color:var(--cyan)}
.table-wrap{overflow-x:auto;margin:20px 0}
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th,.data-table td{padding:12px 14px;border:1px solid var(--border);text-align:left}
.data-table th{background:var(--surface2);color:#fff;font-weight:700}
.data-table td{color:#cbd5e1}
.art-nav{display:flex;justify-content:space-between;gap:16px;margin-top:30px;padding-top:20px;border-top:1px solid var(--border)}
.art-nav a{font-size:14px;font-weight:600}
.art-comments{margin-top:30px}
.art-comments h3{font-size:18px;margin-bottom:18px}
.comment{border:1px solid var(--border);border-radius:12px;padding:16px 18px;margin-bottom:14px;background:var(--bg)}
.comment .c-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.comment .c-head .avatar{width:34px;height:34px;border-radius:50%;background:var(--grad2);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:13px}
.comment .c-head b{font-size:13.5px;color:#fff}
.comment .c-head span{font-size:11.5px;color:var(--muted2)}
.comment p{font-size:13.5px;color:var(--muted);margin:0}

/* 侧边栏 */
.sidebar{position:sticky;top:88px}
.side-widget{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.side-widget h3{font-size:15px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--border)}
.side-widget ul li{margin-bottom:10px}
.side-widget ul li a{color:var(--muted);font-size:13.5px;line-height:1.5;display:block}
.side-widget ul li a:hover{color:var(--cyan)}
.side-widget ul li .hot{color:var(--cyan);font-size:11px;font-weight:700;margin-right:6px}
.side-widget .cat-tag{display:inline-block;background:var(--surface2);border:1px solid var(--border);color:var(--muted);padding:6px 14px;border-radius:999px;font-size:12.5px;margin:0 6px 8px 0}

/* 相关阅读 */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:40px}
.related .news-card{height:100%}

/* 响应式 */
@media(max-width:1024px){
  .hero-inner{grid-template-columns:1fr}
  .grid-4,.grid-5{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .news-grid,.reviews,.related{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .article-layout{grid-template-columns:1fr}
  .sidebar{position:static}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .section{padding:52px 0}
  .hero h1{font-size:32px}
  .grid-2,.grid-3,.grid-4,.grid-5{grid-template-columns:1fr}
  .news-grid,.reviews,.related,.dl-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .footer-grid{grid-template-columns:1fr}
  .hero-stats{gap:20px}
  .article{padding:22px}
}