/* iKuuu 官网全局样式 */
:root{--primary:#0f766e;--primary-d:#115e59;--accent:#f59e0b;--dark:#0b1220;--dark2:#111c2e;--bg:#f6f8fb;--txt:#1f2937;--muted:#64748b;--line:#e5e7eb;--card:#fff;--radius:14px;--shadow:0 8px 30px rgba(2,20,40,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",-apple-system,sans-serif;color:var(--txt);background:var(--bg);line-height:1.7;font-size:16px}
a{text-decoration:none;color:inherit}
img{max-width:100%;height:auto;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
section{padding:64px 0}
.sec-head{text-align:center;max-width:760px;margin:0 auto 40px}
.sec-tag{display:inline-block;color:var(--primary);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}
.sec-title{font-size:32px;font-weight:800;color:var(--dark);line-height:1.3}
.sec-desc{color:var(--muted);margin-top:12px;font-size:16px}

/* 顶部导航 */
.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{width:34px;height:34px;border-radius:8px}
.brand strong{font-size:20px;color:var(--dark);font-weight:800}
.brand strong span{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:15px;font-weight:600;color:var(--txt);position:relative}
.nav-links a:hover{color:var(--primary)}
.nav-cta{display:flex;gap:10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;transition:.2s;border:none}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-accent{background:var(--accent);color:#241c00}
.btn-accent:hover{background:#d98a06}
.btn-outline{border:2px solid var(--primary);color:var(--primary);background:transparent}
.btn-outline:hover{background:var(--primary);color:#fff}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-sm{padding:8px 16px;font-size:14px}

/* Hero */
.hero{background:linear-gradient(135deg,#0b1220 0%,#123a52 55%,#0f766e 100%);color:#fff;padding:70px 0 90px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:rgba(245,158,11,.14);top:-160px;right:-120px;filter:blur(30px)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;position:relative;z-index:2}
.hero h1{font-size:42px;font-weight:900;line-height:1.2;margin:16px 0 18px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .sub{font-size:18px;color:#cbd5e1;max-width:520px}
.hero-badges{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0}
.hero-badges span{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);padding:7px 14px;border-radius:20px;font-size:13px}
.hero-cta{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}
.hero-stats{display:flex;gap:34px;margin-top:34px}
.hero-stats b{font-size:26px;display:block;color:#fff}
.hero-stats span{font-size:13px;color:#94a3b8}

/* 客户端模拟器 */
.simulator{background:#0f172a;border-radius:16px;box-shadow:0 30px 70px rgba(0,0,0,.45);overflow:hidden;border:1px solid rgba(255,255,255,.12)}
.sim-top{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#1e293b;border-bottom:1px solid #334155}
.sim-dot{width:12px;height:12px;border-radius:50%}
.sim-dot.r{background:#f87171}.sim-dot.y{background:#fbbf24}.sim-dot.g{background:#34d399}
.sim-url{flex:1;background:#0f172a;border-radius:8px;padding:5px 12px;font-size:12px;color:#64748b;display:flex;align-items:center;gap:6px}
.sim-url img{width:14px;height:14px}
.sim-body{padding:22px;background:linear-gradient(180deg,#0f172a,#111c33)}
.sim-status{display:flex;align-items:center;gap:10px;padding:14px;background:#1e293b;border-radius:12px;margin-bottom:16px}
.sim-status .on{width:11px;height:11px;background:#34d399;border-radius:50%;box-shadow:0 0 0 4px rgba(52,211,153,.25)}
.sim-status b{color:#e2e8f0}
.sim-status small{color:#94a3b8;display:block}
.sim-node{display:flex;justify-content:space-between;align-items:center;padding:14px;background:#1e293b;border-radius:12px;margin-bottom:10px;border:1px solid #334155}
.sim-node.active{border-color:var(--primary);background:#123a44}
.sim-node .flag{width:30px;height:30px;border-radius:50%;background:linear-gradient(135deg,#34d399,#0ea5e9);display:flex;align-items:center;justify-content:center;font-weight:800;color:#fff;font-size:13px}
.sim-node b{color:#e2e8f0}
.sim-node small{color:#7dd3fc;font-size:12px}
.sim-node .ping{color:#34d399;font-weight:700;font-size:13px}
.sim-connect{width:100%;margin-top:12px;padding:15px;background:var(--primary);color:#fff;border:none;border-radius:12px;font-weight:800;font-size:16px;cursor:pointer}
.sim-connect:hover{background:var(--primary-d)}

/* 公告区 */
.announce{background:var(--accent);color:#241c00}
.announce .container{display:flex;align-items:center;gap:14px;padding:14px 20px}
.announce b{margin-right:8px}
.announce a{text-decoration:underline;font-weight:700}

/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:var(--primary)}
.feature-card .icon{width:52px;height:52px;border-radius:12px;background:rgba(15,118,110,.1);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.feature-card h3{font-size:19px;color:var(--dark);margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:15px}

/* 对比表 */
.compare-wrap{overflow-x:auto}
.compare-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.compare-table th,.compare-table td{padding:15px 18px;text-align:center;border-bottom:1px solid var(--line);font-size:15px}
.compare-table th{background:var(--dark);color:#fff;font-weight:700}
.compare-table td:first-child{text-align:left;font-weight:600}
.compare-table .yes{color:var(--primary);font-weight:800}
.compare-table .no{color:#cbd5e1}
.compare-table tr:last-child td{border-bottom:none}
.compare-table tr.hl{background:rgba(15,118,110,.06)}

/* 新闻 Tabs */
.tabs{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}
.tab-btn{padding:10px 20px;border-radius:24px;border:1px solid var(--line);background:#fff;font-weight:600;cursor:pointer;font-size:14px}
.tab-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.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:.2s}
.news-card:hover{box-shadow:var(--shadow)}
.news-card .thumb{height:160px;background:linear-gradient(135deg,#0f766e,#0ea5e9);display:flex;align-items:center;justify-content:center;font-size:40px;color:#fff}
.news-card .body{padding:18px}
.news-card .meta{font-size:12px;color:var(--muted);margin-bottom:8px}
.news-card h4{font-size:16px;color:var(--dark);line-height:1.5}
.news-card h4 a:hover{color:var(--primary)}

/* 用户评论 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.review-card .stars{color:var(--accent);font-size:16px;letter-spacing:2px}
.review-card p{color:var(--txt);margin:12px 0;font-size:15px}
.review-card .who{display:flex;align-items:center;gap:10px}
.review-card .avatar{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review-card .who b{font-size:14px}
.review-card .who small{color:var(--muted);display:block}

/* 下载区 */
.download-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:.2s}
.dl-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.dl-card .os{font-size:34px;margin-bottom:10px}
.dl-card h4{font-size:16px;color:var(--dark)}
.dl-card small{color:var(--muted);display:block;margin:6px 0 14px}

/* 信任背书 */
.trust{background:var(--dark);color:#fff}
.trust .sec-title{color:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.trust-item{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:26px}
.trust-item .ic{font-size:34px}
.trust-item b{display:block;font-size:16px;margin:10px 0 6px}
.trust-item small{color:#94a3b8}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.scene-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.scene-card .ic{font-size:30px;margin-bottom:12px}
.scene-card h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.scene-card p{color:var(--muted);font-size:15px}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-q{padding:18px 22px;font-weight:700;color:var(--dark);display:flex;justify-content:space-between;align-items:center;cursor:pointer}
.faq-q .plus{color:var(--primary);font-size:22px}
.faq-a{padding:0 22px 20px;color:var(--muted);font-size:15px;border-top:1px dashed var(--line);padding-top:16px}
.faq-a ol{padding-left:20px;margin:10px 0}
.faq-a ol li{margin-bottom:8px}
.faq-a b{color:var(--dark)}

/* 底部 CTA */
.cta{background:linear-gradient(135deg,var(--primary),#0ea5e9);color:#fff;text-align:center}
.cta h2{font-size:34px;font-weight:900}
.cta p{color:#e2f6f4;margin:14px auto 26px;max-width:560px}

/* 页脚 */
.footer{background:#0a0f1a;color:#94a3b8;padding:50px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding-bottom:30px;border-bottom:1px solid #1e293b}
.footer h4{color:#fff;margin-bottom:16px;font-size:16px}
.footer a{display:block;margin-bottom:8px;font-size:14px}
.footer a:hover{color:#fff}
.footer-links{display:flex;flex-wrap:wrap;gap:12px;padding:20px 0;border-bottom:1px solid #1e293b}
.footer-links a{background:#111c2e;padding:6px 14px;border-radius:8px;font-size:13px}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:20px;font-size:13px;flex-wrap:wrap;gap:10px}

/* 面包屑 */
.breadcrumb{background:#fff;border-bottom:1px solid var(--line);padding:14px 0;font-size:14px;color:var(--muted)}
.breadcrumb a{color:var(--primary)}
.breadcrumb span{margin:0 6px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap}

/* 文章页 */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:40px}
.article-main{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:40px}
.article-main h1{font-size:30px;color:var(--dark);line-height:1.35;margin-bottom:16px}
.article-meta{display:flex;gap:20px;color:var(--muted);font-size:14px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:24px}
.article-main h2{font-size:22px;color:var(--dark);margin:32px 0 14px;padding-left:12px;border-left:4px solid var(--primary)}
.article-main p{margin-bottom:16px;color:#374151;font-size:16px}
.article-main img{border-radius:12px;margin:20px 0}
.article-main table{width:100%;border-collapse:collapse;margin:20px 0}
.article-main table th,.article-main table td{border:1px solid var(--line);padding:10px 14px;font-size:14px;text-align:left}
.article-main table th{background:#f1f5f9}
.toc{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:18px 22px;margin-bottom:24px}
.toc b{color:var(--dark)}
.toc ul{margin-top:8px;padding-left:4px}
.toc li{padding:3px 0}
.toc a{color:var(--primary);font-size:14px}
.article-nav{display:flex;justify-content:space-between;gap:12px;margin-top:32px;padding-top:20px;border-top:1px solid var(--line)}
.article-nav a{flex:1;background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:12px 16px;font-size:14px}
.article-nav a:hover{border-color:var(--primary)}

/* 侧栏 */
.sidebar .widget{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.sidebar h3{font-size:17px;color:var(--dark);margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--primary)}
.sidebar .hot-item{display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
.sidebar .hot-item:last-child{border-bottom:none}
.sidebar .hot-item .num{font-size:20px;font-weight:900;color:var(--accent)}
.sidebar .hot-item a{font-size:14px;color:var(--txt);line-height:1.4}
.sidebar .hot-item a:hover{color:var(--primary)}
.sidebar .cat-item{display:flex;justify-content:space-between;padding:8px 0;font-size:14px}
.sidebar .cat-item:hover{color:var(--primary)}

/* 评论 */
.comments{margin-top:30px}
.comment{display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--line)}
.comment .av{width:38px;height:38px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.comment b{font-size:14px}
.comment small{color:var(--muted);margin-left:8px}
.comment p{font-size:14px;color:#4b5563;margin-top:4px}

/* 相关阅读 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:20px}
.related-grid .news-card .thumb{height:110px;font-size:28px}

/* 响应式 */
@media(max-width:960px){
  .hero-grid,.article-layout{grid-template-columns:1fr}
  .features-grid,.reviews-grid,.scene-grid{grid-template-columns:repeat(2,1fr)}
  .download-grid{grid-template-columns:repeat(2,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid,.related-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:30px}
}
@media(max-width:560px){
  .features-grid,.reviews-grid,.scene-grid,.trust-grid,.download-grid,.footer-grid{grid-template-columns:1fr}
}