:root{--primary:#6366f1;--primary-dark:#4f46e5;--cyan:#22d3ee;--amber:#f59e0b;--bg:#0f172a;--bg2:#1e293b;--card:#ffffff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--ok:#10b981;--radius:16px;--shadow:0 10px 40px rgba(15,23,42,.12)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-dark{background:var(--bg);color:#e2e8f0}
.section-grad{background:linear-gradient(135deg,#6366f1 0%,#4f46e5 45%,#22d3ee 130%)}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.section-tag{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.5px;color:var(--primary);background:rgba(99,102,241,.1);padding:6px 14px;border-radius:999px;margin-bottom:14px}
.section-title{font-size:34px;font-weight:800;line-height:1.25;margin-bottom:16px}
.section-sub{color:var(--muted);font-size:17px;max-width:720px}
.center{text-align:center}
.center .section-sub{margin:0 auto}
.mt32{margin-top:32px}
.mt48{margin-top:48px}

/* 导航 */
.nav{position:sticky;top:0;z-index:100;background:rgba(15,23,42,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#fff}
.brand img{width:34px;height:34px;border-radius:8px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{color:#cbd5e1;font-size:14px;padding:8px 14px;border-radius:8px;font-weight:500;transition:.2s}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav-links a.btn{background:var(--amber);color:#1e293b;font-weight:700}
.nav-links a.btn:hover{background:#fbbf24}
.lang-toggle{margin-left:6px;font-size:13px;color:#a5b4fc;border:1px solid rgba(165,180,252,.4);padding:6px 12px;border-radius:8px}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}

/* Hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(99,102,241,.35),transparent),var(--bg);color:#fff;padding:80px 0 60px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:46px;font-weight:900;line-height:1.15;margin:18px 0 20px}
.hero h1 span{background:linear-gradient(90deg,#22d3ee,#818cf8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-desc{font-size:18px;color:#cbd5e1;max-width:560px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:16px;padding:14px 28px;border-radius:12px;transition:.2s;cursor:pointer;border:0}
.btn-primary{background:var(--amber);color:#1e293b}
.btn-primary:hover{background:#fbbf24;transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.18)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.hero-stats{display:flex;gap:36px;margin-top:34px}
.hero-stats .n{font-size:30px;font-weight:900;color:#fff}
.hero-stats .l{font-size:13px;color:#94a3b8}

/* 客户端模拟器 */
.simulator{background:#0b1220;border:1px solid rgba(255,255,255,.12);border-radius:20px;box-shadow:0 30px 80px rgba(0,0,0,.5);overflow:hidden}
.sim-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#111a2e;border-bottom:1px solid rgba(255,255,255,.08)}
.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{margin-left:10px;font-size:12px;color:#64748b}
.sim-body{padding:22px}
.sim-status{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(90deg,rgba(99,102,241,.2),rgba(34,211,238,.15));border:1px solid rgba(99,102,241,.4);border-radius:14px;padding:16px 18px;margin-bottom:18px}
.sim-status .left{display:flex;align-items:center;gap:12px}
.sim-flag{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#6366f1,#22d3ee);display:flex;align-items:center;justify-content:center;font-weight:900;color:#fff;font-size:18px}
.sim-status .name{font-weight:700;color:#fff;font-size:15px}
.sim-status .ip{font-size:12px;color:#94a3b8}
.sim-connect{background:#10b981;color:#fff;border:0;padding:10px 20px;border-radius:10px;font-weight:700;font-size:14px}
.sim-row{display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.06);font-size:13px}
.sim-row .k{color:#94a3b8}
.sim-row .v{color:#e2e8f0;font-weight:600}
.sim-nodes{margin-top:14px}
.sim-node{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:12px;background:rgba(255,255,255,.04);margin-bottom:8px}
.sim-node .dot{width:10px;height:10px;border-radius:50%;background:#10b981}
.sim-node .cnt{color:#e2e8f0;font-weight:600;font-size:13px}
.sim-node .ping{margin-left:auto;font-size:12px;color:#22d3ee;font-weight:700}

/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--primary)}
.feature-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#6366f1,#22d3ee);display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;margin-bottom:18px}
.feature-card h3{font-size:19px;font-weight:800;margin-bottom:10px}
.feature-card p{color:var(--muted);font-size:15px}

/* 公告 */
.notice{background:var(--bg2);color:#e2e8f0;border-radius:var(--radius);padding:20px 26px;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.notice .tag{background:var(--amber);color:#1e293b;font-weight:800;font-size:13px;padding:5px 12px;border-radius:8px;white-space:nowrap}
.notice p{font-size:15px;color:#cbd5e1}

/* 信任背书 */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-item{text-align:center;padding:28px 16px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius)}
.trust-item .num{font-size:34px;font-weight:900;color:var(--primary)}
.trust-item .lbl{color:var(--muted);font-size:14px;margin-top:6px}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:#fff}
.scene-card .ph{height:160px;background:linear-gradient(135deg,#6366f1,#22d3ee);display:flex;align-items:center;justify-content:center;color:#fff;font-size:40px}
.scene-card .bd{padding:20px}
.scene-card h3{font-size:17px;font-weight:800;margin-bottom:8px}
.scene-card p{color:var(--muted);font-size:14px}

/* 对比表 */
.compare-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.compare-table th,.compare-table td{padding:16px 18px;text-align:center;font-size:14px}
.compare-table thead th{background:var(--bg);color:#fff;font-weight:700}
.compare-table thead th.hl{background:var(--primary)}
.compare-table tbody tr:nth-child(even){background:#f8fafc}
.compare-table td:first-child{text-align:left;font-weight:600}
.compare-table .yes{color:var(--ok);font-weight:800}
.compare-table .no{color:#cbd5e1}

/* 新闻 Tab */
.news-tabs{display:flex;gap:8px;margin-bottom:28px;flex-wrap:wrap}
.news-tab{padding:9px 20px;border-radius:999px;border:1px solid var(--line);font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;background:#fff}
.news-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.news-list{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.2s;display:block}
.news-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.news-card .thumb{height:150px;background:linear-gradient(135deg,#6366f1,#22d3ee);display:flex;align-items:center;justify-content:center;color:#fff;font-size:34px}
.news-card .bd{padding:18px}
.news-card .cat{font-size:12px;color:var(--primary);font-weight:700}
.news-card h4{font-size:16px;font-weight:800;margin:6px 0 8px;line-height:1.4}
.news-card .date{font-size:12px;color:#94a3b8}

/* 用户评论 */
.review-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:#f59e0b;font-size:16px;margin-bottom:12px}
.review-card p{font-size:14px;color:#334155;margin-bottom:16px}
.review-card .user{display:flex;align-items:center;gap:10px}
.review-card .ava{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#6366f1,#22d3ee);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}
.review-card .uname{font-weight:700;font-size:14px}
.review-card .umeta{font-size:12px;color:#94a3b8}

/* 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 16px;text-align:center;transition:.2s}
.dl-card:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.dl-card .ico{font-size:40px;margin-bottom:12px}
.dl-card h4{font-size:15px;font-weight:800;margin-bottom:6px}
.dl-card .ver{font-size:12px;color:#94a3b8;margin-bottom:14px}
.dl-card .btn{padding:10px 18px;font-size:13px;width:100%}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:14px;margin-bottom:14px;background:#fff;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:20px 24px;font-size:17px;font-weight:700;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q .arr{color:var(--primary);font-size:20px;transition:.3s}
.faq-a{padding:0 24px 22px;color:var(--muted);font-size:15px;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .arr{transform:rotate(45deg)}
.faq-a ol{padding-left:20px;margin-top:8px}
.faq-a ol li{margin-bottom:8px}

/* CTA */
.cta{padding:80px 0;text-align:center}
.cta h2{font-size:36px;font-weight:900;color:#fff;margin-bottom:16px}
.cta p{color:#e2e8f0;font-size:17px;margin-bottom:30px}

/* 页脚 */
.footer{background:var(--bg);color:#94a3b8;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.footer h5{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px}
.footer a{display:block;color:#94a3b8;font-size:14px;margin-bottom:9px}
.footer a:hover{color:#22d3ee}
.footer .brand{color:#fff}
.footer .desc{font-size:13px;color:#64748b;margin-top:10px;max-width:300px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;font-size:13px;color:#64748b;text-align:center}

/* 内页头部 */
.page-head{background:radial-gradient(900px 400px at 70% -20%,rgba(99,102,241,.4),transparent),var(--bg);color:#fff;padding:64px 0}
.page-head h1{font-size:36px;font-weight:900;margin:14px 0 10px}
.page-head p{color:#cbd5e1;font-size:16px;max-width:640px}
.breadcrumb{font-size:13px;color:#94a3b8;margin-bottom:6px}
.breadcrumb a{color:#a5b4fc}
.breadcrumb a:hover{color:#fff}

/* 文章页 */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:40px;padding:56px 0}
.article-body h1{font-size:30px;font-weight:900;line-height:1.3;margin-bottom:16px}
.article-meta{display:flex;gap:16px;align-items:center;font-size:13px;color:#94a3b8;margin-bottom:26px;flex-wrap:wrap}
.article-body h2{font-size:22px;font-weight:800;margin:34px 0 14px;padding-left:12px;border-left:4px solid var(--primary)}
.article-body p{margin-bottom:16px;color:#334155;font-size:16px}
.article-body img{border-radius:12px;margin:20px 0}
.article-fig{font-size:12px;color:#94a3b8;text-align:center;margin:-12px 0 22px}
.article-pager{display:flex;justify-content:space-between;margin-top:44px;padding-top:24px;border-top:1px solid var(--line);gap:12px}
.article-pager a{font-size:14px;color:var(--primary);font-weight:600}
.article-pager a:hover{text-decoration:underline}
.back-link{font-size:14px;color:var(--primary);font-weight:600}

/* 侧边栏 */
.sidebar-card{border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px}
.sidebar-card h4{font-size:16px;font-weight:800;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.sidebar-card .hot-item{display:block;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;color:#334155;line-height:1.5}
.sidebar-card .hot-item:hover{color:var(--primary)}
.sidebar-card .cat-item{display:block;padding:7px 0;font-size:14px;color:#334155}
.sidebar-card .cat-item:hover{color:var(--primary)}

/* 404 */
.error-page{text-align:center;padding:120px 20px}
.error-page .code{font-size:110px;font-weight:900;background:linear-gradient(135deg,#6366f1,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.error-page h2{font-size:28px;font-weight:800;margin:20px 0 12px}
.error-page p{color:var(--muted);margin-bottom:28px}

/* 响应式 */
@media(max-width:960px){
.hero-grid{grid-template-columns:1fr}
.features-grid,.scene-grid,.review-grid{grid-template-columns:1fr 1fr}
.trust-grid,.download-grid{grid-template-columns:1fr 1fr}
.news-list{grid-template-columns:1fr 1fr}
.article-layout{grid-template-columns:1fr}
.nav-links{display:none}
.nav-toggle{display:block}
}
@media(max-width:600px){
.features-grid,.scene-grid,.review-grid,.news-list,.trust-grid,.download-grid{grid-template-columns:1fr}
.hero h1{font-size:34px}
.section-title{font-size:28px}
}