/* ===== iKuuu 官方站点样式 · 极光蓝紫深色科技风 ===== */
:root{
  --bg:#080c1a;--bg-2:#0e1428;--card:#111a33;--card-2:#16213f;
  --line:#243055;--line-soft:#1c2745;
  --brand:#4f6df5;--brand-2:#8b5cf6;--accent:#22d3ee;
  --grad:linear-gradient(135deg,#4f6df5 0%,#8b5cf6 55%,#22d3ee 100%);
  --text:#e8ecf4;--muted:#9aa5bd;--dim:#6b7690;
  --ok:#34d399;--warn:#fbbf24;--err:#f87171;
  --radius:16px;--radius-s:10px;
  --shadow:0 12px 40px rgba(2,6,23,.55);
  --maxw:1180px;
}
*{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","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4{line-height:1.3;font-weight:700;letter-spacing:.2px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
::selection{background:#4f6df5;color:#fff}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#243055;border-radius:8px}

/* 按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--grad);color:#fff;font-weight:700;padding:13px 26px;border-radius:12px;font-size:15px;transition:.2s;border:none;cursor:pointer}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(79,109,245,.4);color:#fff}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.btn.ghost:hover{border-color:var(--brand);color:#fff}
.btn.lg{padding:16px 34px;font-size:17px}
.btn.sm{padding:9px 18px;font-size:13px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:100;background:rgba(8,12,26,.85);backdrop-filter:blur(14px);border-bottom:1px solid var(--line-soft)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800}
.brand img{width:34px;height:34px;border-radius:8px}
.brand b{color:#fff}
.brand span{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:24px;margin-left:auto;font-size:15px}
.nav-links a{color:var(--muted);padding:6px 2px;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:#fff}
.nav-cta{margin-left:6px}
.nav-toggle{display:none;margin-left:auto;font-size:24px;color:#fff;background:none;border:none}

/* Hero */
.hero{position:relative;padding:64px 0 72px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 500px at 20% 0%,rgba(79,109,245,.25),transparent 60%),radial-gradient(700px 500px at 90% 20%,rgba(139,92,246,.2),transparent 60%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:44px;line-height:1.22;margin:18px 0}
.hero h1 .ac{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{color:var(--muted);font-size:17px;max-width:520px;margin:18px 0 28px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(79,109,245,.14);border:1px solid rgba(79,109,245,.4);color:#c7d2fe;padding:7px 14px;border-radius:999px;font-size:13px;font-weight:600}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:30px;margin-top:30px}
.hero-stats .n{font-size:26px;font-weight:800;color:#fff}
.hero-stats .l{font-size:13px;color:var(--dim)}

/* 客户端模拟器 */
.sim{background:linear-gradient(180deg,#111a33,#0c1226);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.sim-top{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line-soft)}
.sim-dot{width:11px;height:11px;border-radius:50%}
.sim-dot.r{background:#f87171}.sim-dot.y{background:#fbbf24}.sim-dot.g{background:#34d399}
.sim-title{color:var(--muted);font-size:13px;margin-left:8px}
.sim-body{padding:20px}
.sim-status{display:flex;align-items:center;gap:14px;background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.25);border-radius:12px;padding:16px;margin-bottom:16px}
.sim-ring{width:54px;height:54px;border-radius:50%;border:4px solid rgba(52,211,153,.2);border-top-color:#34d399;animation:spin 1.6s linear infinite;display:flex;align-items:center;justify-content:center;font-size:20px}
@keyframes spin{to{transform:rotate(360deg)}}
.sim-status .t b{font-size:16px;color:#fff;display:block}
.sim-status .t span{font-size:12px;color:var(--muted)}
.sim-node{display:flex;align-items:center;justify-content:space-between;background:var(--card);border:1px solid var(--line-soft);border-radius:10px;padding:12px 14px;margin-bottom:10px;font-size:14px}
.sim-node .fl{display:flex;align-items:center;gap:10px}
.sim-node .fl .ico{width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:15px}
.sim-node .val{color:var(--ok);font-weight:700;font-size:13px}
.sim-bar{height:6px;background:var(--line-soft);border-radius:6px;overflow:hidden;margin:14px 0 8px}
.sim-bar i{display:block;height:100%;width:72%;background:var(--grad);border-radius:6px}
.sim-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--dim)}

/* 区块 */
section{padding:64px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 42px}
.sec-head h2{font-size:32px;margin-bottom:14px}
.sec-head h2 .ac{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-head p{color:var(--muted)}
.kicker{display:inline-block;color:var(--accent);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}

/* 公告 */
.notice{background:rgba(251,191,36,.06);border:1px solid rgba(251,191,36,.25);border-radius:12px;padding:14px 18px;display:flex;align-items:center;gap:12px;font-size:14px;color:#fde68a}
.notice .tag{background:rgba(251,191,36,.15);color:#fbbf24;padding:3px 10px;border-radius:6px;font-weight:700;font-size:12px;white-space:nowrap}

/* 功能卡片 */
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line-soft);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:var(--brand);box-shadow:var(--shadow)}
.card .ico{width:52px;height:52px;border-radius:14px;background:rgba(79,109,245,.14);display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.card h3{font-size:18px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}

/* 对比表 */
.compare{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.compare table{width:100%;border-collapse:collapse;min-width:640px}
.compare th,.compare td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line-soft);font-size:14.5px}
.compare th{background:var(--card-2);color:#fff;font-size:14px}
.compare td.hl{color:var(--ok);font-weight:700}
.compare tr:last-child td{border-bottom:none}
.compare .brand-col{background:rgba(79,109,245,.08)}

/* 新闻Tab */
.tabs{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
.tab{display:inline-block;padding:9px 20px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--muted)}
.tab:hover,.tab.active{background:var(--grad);color:#fff;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-soft);border-radius:var(--radius);overflow:hidden;transition:.25s}
.news-card:hover{transform:translateY(-4px);border-color:var(--brand)}
.news-card .thumb{aspect-ratio:16/9;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:34px}
.news-card .body{padding:18px}
.news-card .cat{font-size:12px;color:var(--accent);font-weight:700}
.news-card h3{font-size:16px;margin:8px 0 10px;line-height:1.4}
.news-card .date{font-size:12px;color:var(--dim)}

/* 评论 */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{background:var(--card);border:1px solid var(--line-soft);border-radius:var(--radius);padding:24px}
.review .stars{color:var(--warn);font-size:14px;letter-spacing:2px;margin-bottom:12px}
.review p{color:var(--muted);font-size:14.5px;font-style:italic}
.review .who{display:flex;align-items:center;gap:12px;margin-top:16px}
.review .av{width:40px;height:40px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.review .who b{font-size:14px;display:block}
.review .who span{font-size:12px;color:var(--dim)}

/* 下载区 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-item{background:var(--card);border:1px solid var(--line-soft);border-radius:var(--radius);padding:24px 16px;text-align:center;transition:.25s}
.dl-item:hover{transform:translateY(-4px);border-color:var(--brand)}
.dl-item .ico{width:56px;height:56px;border-radius:16px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 14px}
.dl-item h3{font-size:16px;margin-bottom:4px}
.dl-item .ver{font-size:12px;color:var(--dim);margin-bottom:12px}

/* 信任背书 */
.trust{display:flex;gap:22px;flex-wrap:wrap;justify-content:center}
.trust-item{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:14px 22px;font-size:14px}
.trust-item .t{font-size:22px}

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

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line-soft);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-q{padding:18px 22px;font-weight:700;font-size:16px;display:flex;align-items:center;gap:12px;cursor:pointer}
.faq-q .num{width:28px;height:28px;border-radius:8px;background:rgba(79,109,245,.15);color:#c7d2fe;display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0}
.faq-a{padding:0 22px 20px;color:var(--muted);font-size:14.5px}
.faq-a ol{padding-left:20px;margin:8px 0}
.faq-a ol li{list-style:decimal;margin:6px 0}
.faq-a h4{color:#fff;font-size:15px;margin:12px 0 6px}

/* CTA */
.cta{text-align:center;padding:72px 0;background:radial-gradient(700px 400px at 50% 0%,rgba(79,109,245,.25),transparent 60%)}
.cta h2{font-size:34px;margin-bottom:14px}
.cta p{color:var(--muted);margin-bottom:28px}

/* 页脚 */
footer{border-top:1px solid var(--line-soft);padding:50px 0 30px;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;margin-bottom:12px}
.foot-brand img{width:30px;height:30px;border-radius:8px}
footer p{color:var(--muted);font-size:13.5px}
footer h4{font-size:14px;color:#fff;margin-bottom:14px}
footer .flinks a{display:block;color:var(--muted);font-size:13.5px;padding:4px 0}
footer .flinks a:hover{color:#fff}
.foot-bottom{border-top:1px solid var(--line-soft);padding-top:22px;text-align:center;font-size:12.5px;color:var(--dim)}
.friendlinks{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:center;margin:14px 0}
.friendlinks a{color:var(--dim);font-size:12.5px}
.friendlinks a:hover{color:var(--accent)}

/* 面包屑 */
.crumb{padding:20px 0 0;font-size:13.5px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}
.crumb .sep{margin:0 8px;color:var(--dim)}

/* 页面头 */
.page-hero{padding:52px 0 40px;text-align:center;background:radial-gradient(700px 300px at 50% 0%,rgba(79,109,245,.2),transparent 60%)}
.page-hero h1{font-size:36px;margin-bottom:14px}
.page-hero p{color:var(--muted);max-width:680px;margin:0 auto}

/* 文章详情 */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;padding:36px 0 60px}
.article-main h1{font-size:30px;margin:14px 0 10px;line-height:1.35}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--dim);margin-bottom:22px}
.article-body{color:#cdd5e5;font-size:15.5px}
.article-body p{margin:16px 0}
.article-body h2{font-size:22px;margin:30px 0 14px;color:#fff;padding-left:12px;border-left:4px solid var(--brand)}
.article-body h3{font-size:18px;margin:22px 0 10px;color:#fff}
.article-body ul,.article-body ol{padding-left:24px;margin:12px 0}
.article-body ul li{list-style:disc;margin:6px 0}
.article-body ol li{list-style:decimal;margin:6px 0}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--card-2);color:#fff}
.article-body blockquote{border-left:4px solid var(--accent);background:var(--card);padding:14px 18px;margin:18px 0;color:var(--muted);border-radius:0 10px 10px 0}
.article-body img{border-radius:12px;margin:18px 0}
.article-body .figcaption{font-size:12.5px;color:var(--dim);text-align:center;margin-top:-10px}
.toc{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:18px;margin:20px 0}
.toc b{display:block;margin-bottom:10px;color:#fff}
.toc a{display:block;color:var(--muted);font-size:14px;padding:4px 0}
.toc a:hover{color:var(--accent)}
.sidebar-widget{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:20px;margin-bottom:22px}
.sidebar-widget h4{font-size:15px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line-soft)}
.sidebar-widget .hot{display:flex;gap:10px;margin-bottom:14px}
.sidebar-widget .hot .n{font-size:22px;font-weight:800;color:var(--dim)}
.sidebar-widget .hot a{font-size:13.5px;color:var(--muted);line-height:1.4}
.sidebar-widget .hot a:hover{color:#fff}
.sidebar-widget .cat-link{display:block;color:var(--muted);font-size:13.5px;padding:6px 0;border-bottom:1px solid var(--line-soft)}
.prev-next{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:30px 0}
.pn{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:16px;font-size:14px}
.pn small{color:var(--dim);display:block;margin-bottom:6px}
.pn a{color:var(--text);line-height:1.4}
.pn a:hover{color:var(--accent)}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:20px}
.comments{margin-top:30px}
.comment-item{background:var(--card);border:1px solid var(--line-soft);border-radius:12px;padding:16px;margin-bottom:14px}
.comment-item .top{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.comment-item .av{width:34px;height:34px;border-radius:50%;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;font-weight:700}
.comment-item b{font-size:13.5px}
.comment-item .date{font-size:12px;color:var(--dim);margin-left:auto}
.comment-item p{color:var(--muted);font-size:14px}

/* 面包屑 JSON-LD 无视觉样式 */

@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr}
  .g3,.g2,.g4,.news-grid,.reviews,.scenes{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:repeat(3,1fr)}
  .article-layout{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-links{display:none}
  .nav-toggle{display:block}
  .g3,.g2,.g4,.news-grid,.reviews,.scenes,.dl-grid,.related,.prev-next,.foot-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  section{padding:44px 0}
  .sec-head h2{font-size:26px}
}