*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#ffffff;--bg-soft:#f5f7fb;--ink:#0f172a;--ink-2:#334155;--muted:#64748b;--line:#e2e8f0;--brand:#5b8cff;--brand-2:#7c4dff;--navy:#0b1220;--navy-2:#111a2e;--ok:#10b981;--warn:#f59e0b;--danger:#ef4444;--radius:16px;--radius-sm:10px;--shadow:0 10px 40px rgba(15,23,42,.08);--shadow-lg:0 24px 70px rgba(15,23,42,.14)}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-alt{background:var(--bg-soft)}
.section-dark{background:var(--navy);color:#e2e8f0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
h1,h2,h3,h4{line-height:1.25;font-weight:800;color:var(--ink)}
.section-dark h1,.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-title{font-size:clamp(26px,4vw,40px);margin-bottom:14px}
.section-desc{color:var(--muted);font-size:17px;max-width:720px;margin:0 auto 44px}
.center{text-align:center}
/* 头部导航 */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);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;font-weight:800;font-size:20px;color:var(--ink)}
.brand img{width:34px;height:34px;border-radius:8px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:8px 14px;border-radius:8px;font-size:15px;font-weight:600;color:var(--ink-2);transition:.2s}
.nav-links a:hover{color:var(--brand);background:var(--bg-soft)}
.nav-cta{margin-left:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:15px;padding:12px 24px;border-radius:12px;cursor:pointer;transition:.2s;border:1px solid transparent;line-height:1.2}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 22px rgba(91,140,255,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(91,140,255,.45)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-light{background:#fff;color:var(--navy)}
.btn-lg{padding:15px 32px;font-size:16px;border-radius:14px}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
/* Hero */
.hero{padding:72px 0 56px;background:radial-gradient(1200px 600px at 80% -10%,rgba(124,77,255,.12),transparent 60%),radial-gradient(900px 500px at 0% 0%,rgba(91,140,255,.14),transparent 55%),var(--bg)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(34px,5vw,56px);letter-spacing:-.02em;margin-bottom:20px}
.hero h1 .grad{background:linear-gradient(135deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:18px;color:var(--muted);margin-bottom:28px;max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-meta{display:flex;gap:26px;flex-wrap:wrap;font-size:14px;color:var(--muted)}
.hero-meta strong{display:block;font-size:22px;color:var(--ink);font-weight:800}
/* 客户端模拟器 */
.simulator{background:var(--navy);border-radius:20px;padding:18px;box-shadow:var(--shadow-lg);position:relative}
.sim-bar{display:flex;align-items:center;gap:8px;padding:0 4px 14px;border-bottom:1px solid rgba(255,255,255,.08);margin-bottom:16px}
.sim-dot{width:12px;height:12px;border-radius:50%}
.sim-dot.r{background:#ff5f57}.sim-dot.y{background:#febc2e}.sim-dot.g{background:#28c840}
.sim-title{margin-left:8px;color:#94a3b8;font-size:12px;font-family:ui-monospace,Menlo,monospace}
.sim-body{display:grid;grid-template-columns:200px 1fr;gap:16px}
.sim-side{background:rgba(255,255,255,.04);border-radius:12px;padding:14px}
.sim-side .node{display:flex;align-items:center;gap:8px;padding:9px 10px;border-radius:8px;font-size:13px;color:#cbd5e1;margin-bottom:4px}
.sim-side .node.active{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.sim-side .node .flag{width:20px;height:14px;border-radius:3px;background:#334155;display:inline-block;overflow:hidden}
.sim-main{background:rgba(255,255,255,.04);border-radius:12px;padding:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}
.sim-ring{width:150px;height:150px;border-radius:50%;border:8px solid rgba(91,140,255,.2);border-top-color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:18px;animation:spin 3s linear infinite}
.sim-ring .core{width:70px;height:70px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:22px;animation:spin 3s linear infinite reverse}
@keyframes spin{to{transform:rotate(360deg)}}
.sim-main .status{font-size:15px;color:#e2e8f0;font-weight:700;margin-bottom:4px}
.sim-main .sub{font-size:12px;color:#94a3b8;font-family:ui-monospace,Menlo,monospace}
.sim-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;width:100%;margin-top:20px}
.sim-stat{background:rgba(255,255,255,.05);border-radius:10px;padding:10px;font-size:12px;color:#94a3b8}
.sim-stat b{display:block;font-size:16px;color:#fff}
/* 公告区 */
.notice{border:1px solid rgba(91,140,255,.25);background:rgba(91,140,255,.06);border-radius:var(--radius);padding:18px 22px;display:flex;gap:14px;align-items:flex-start}
.notice .tag{flex-shrink:0;background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:6px}
.notice p{color:var(--ink-2);font-size:15px}
/* 卡片网格 */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.card .icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px;background:linear-gradient(135deg,rgba(91,140,255,.14),rgba(124,77,255,.14));color:var(--brand)}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
/* 对比表格 */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow)}
table.compare{width:100%;border-collapse:collapse;min-width:640px;font-size:15px}
table.compare th,table.compare td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line)}
table.compare thead th{background:var(--navy);color:#fff;font-weight:700}
table.compare thead th.hl{background:linear-gradient(135deg,var(--brand),var(--brand-2))}
table.compare tbody th{text-align:left;font-weight:600;color:var(--ink-2);background:var(--bg-soft)}
table.compare td.yes{color:var(--ok);font-weight:700}
table.compare td.no{color:var(--muted)}
/* 新闻 */
.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:36px;flex-wrap:wrap}
.tab{background:var(--bg-soft);border:1px solid var(--line);color:var(--ink-2);font-weight:600;font-size:14px;padding:10px 20px;border-radius:999px;cursor:pointer;transition:.2s}
.tab.active,.tab:hover{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:.25s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-card .thumb{height:170px;background:linear-gradient(135deg,#1e293b,#334155);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.7);font-size:13px;overflow:hidden}
.news-card .thumb img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:20px;flex:1;display:flex;flex-direction:column}
.news-card .cat{font-size:12px;color:var(--brand);font-weight:700;margin-bottom:8px}
.news-card h3{font-size:16px;margin-bottom:10px;line-height:1.45}
.news-card h3 a:hover{color:var(--brand)}
.news-card .meta{font-size:13px;color:var(--muted);margin-top:auto}
/* 评论 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{border:1px solid var(--line);border-radius:var(--radius);padding:26px;background:#fff}
.review .stars{color:var(--warn);letter-spacing:2px;margin-bottom:12px;font-size:16px}
.review p{color:var(--ink-2);font-size:15px;margin-bottom:18px}
.review .user{display:flex;align-items:center;gap:12px}
.review .avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review .user b{display:block;font-size:14px}
.review .user span{font-size:12px;color:var(--muted)}
/* 下载 */
.download-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-card{border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center;background:#fff;transition:.25s;display:flex;flex-direction:column;gap:12px;align-items:center}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.dl-card .os{width:56px;height:56px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;background:var(--bg-soft)}
.dl-card b{font-size:15px}
.dl-card span{font-size:12px;color:var(--muted)}
/* 信任背书 */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-item{border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;background:#fff}
.trust-item .big{font-size:28px;font-weight:800;color:var(--brand);display:block;margin-bottom:4px}
.trust-item p{font-size:13px;color:var(--muted)}
/* 应用场景 */
.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scenario{border-radius:var(--radius);padding:30px;background:linear-gradient(160deg,#fff,#f5f7fb);border:1px solid var(--line)}
.scenario h3{font-size:18px;margin:14px 0 10px}
.scenario .icon{font-size:30px}
.scenario p{color:var(--muted);font-size:14.5px}
/* FAQ */
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:14px;background:#fff;overflow:hidden}
.faq-item summary{padding:18px 22px;font-weight:700;font-size:16px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;color:var(--ink)}
.faq-item summary::after{content:"+";font-size:24px;color:var(--brand);font-weight:400;transition:.2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .answer{padding:0 22px 22px;color:var(--ink-2);font-size:15px}
.faq-item .answer ol{margin:10px 0 0 20px;list-style:decimal}
.faq-item .answer ol li{margin-bottom:8px}
.faq-item .answer a{color:var(--brand);font-weight:600}
/* CTA */
.cta{background:linear-gradient(135deg,var(--navy),var(--navy-2));border-radius:24px;padding:56px 40px;text-align:center;color:#e2e8f0;position:relative;overflow:hidden}
.cta h2{font-size:clamp(26px,4vw,36px);color:#fff;margin-bottom:14px}
.cta p{color:#94a3b8;margin-bottom:28px;font-size:16px}
/* 页脚 */
.site-footer{background:var(--navy);color:#94a3b8;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col a{display:block;color:#94a3b8;font-size:14px;margin-bottom:10px;transition:.2s}
.footer-col a:hover{color:#fff}
.footer-brand{color:#cbd5e1;font-size:14px;max-width:300px}
.footer-brand img{width:36px;height:36px;border-radius:8px;margin-bottom:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom a{color:#94a3b8}
/* 面包屑 */
.breadcrumb{font-size:14px;color:var(--muted);padding:20px 0;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:var(--brand);font-weight:600}
.breadcrumb .sep{color:#cbd5e1}
/* 文章 */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:48px;align-items:start}
.article{margin:0 auto}
.article-hero{padding:40px 0 0}
.article h1{font-size:clamp(28px,4vw,40px);margin:14px 0 18px}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin-bottom:24px}
.article-cover{border-radius:var(--radius);overflow:hidden;margin-bottom:32px;background:linear-gradient(135deg,#1e293b,#334155)}
.article-cover img{width:100%;height:auto}
.article-body{font-size:17px;color:var(--ink-2)}
.article-body h2{font-size:26px;margin:40px 0 16px;color:var(--ink)}
.article-body h3{font-size:20px;margin:28px 0 12px;color:var(--ink)}
.article-body p{margin-bottom:18px}
.article-body img{border-radius:var(--radius-sm);margin:18px 0}
.article-body ul,.article-body ol{margin:0 0 18px 22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:8px}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-body table th,.article-body table td{border:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body table th{background:var(--bg-soft);font-weight:700}
.article-body blockquote{border-left:4px solid var(--brand);background:var(--bg-soft);padding:16px 20px;margin:20px 0;border-radius:0 8px 8px 0;color:var(--ink-2);font-style:italic}
.article-body a{color:var(--brand);font-weight:600}
.toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:30px}
.toc h3{font-size:15px;margin-bottom:12px}
.toc ol{margin-left:20px;list-style:decimal}
.toc li{margin-bottom:6px;font-size:14px}
.toc a{color:var(--ink-2)}
.toc a:hover{color:var(--brand)}
/* 侧栏 */
.sidebar{position:sticky;top:88px}
.side-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:20px}
.side-card h4{font-size:15px;margin-bottom:14px}
.side-card ul li{margin-bottom:10px;font-size:14px}
.side-card ul li a{color:var(--ink-2)}
.side-card ul li a:hover{color:var(--brand)}
.side-card .hot-num{color:var(--brand);font-weight:800;margin-right:6px}
/* 上一篇/下一篇 */
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--line)}
.article-nav a{flex:1;border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px;font-size:14px;transition:.2s}
.article-nav a:hover{border-color:var(--brand);color:var(--brand)}
.article-nav .label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px}
.article-nav .next{text-align:right}
/* 相关阅读 */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
/* 404 */
.notfound{min-height:72vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 24px}
.notfound .code{font-size:120px;font-weight:800;background:linear-gradient(135deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.notfound h1{font-size:28px;margin:20px 0 12px}
.notfound p{color:var(--muted);margin-bottom:30px}
/* sitemap */
.sitemap-tree{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.sitemap-tree .group h3{font-size:17px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--brand)}
.sitemap-tree .group a{display:block;color:var(--ink-2);font-size:14px;margin-bottom:9px}
.sitemap-tree .group a:hover{color:var(--brand)}
/* 纯CSS Tab */
.tab-radio{position:absolute;opacity:0;pointer-events:none}
.tab-panel{display:none}
#tab1:checked~.tabs label[for=tab1],#tab2:checked~.tabs label[for=tab2],#tab3:checked~.tabs label[for=tab3]{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border-color:transparent}
#tab1:checked~.tab-panels .panel-1,#tab2:checked~.tab-panels .panel-2,#tab3:checked~.tab-panels .panel-3{display:grid}
/* 响应式 */
@media(max-width:1024px){.hero-grid{grid-template-columns:1fr}.sim-body{grid-template-columns:1fr}.grid-3,.reviews-grid,.news-grid,.scenario-grid,.download-grid,.related-grid{grid-template-columns:repeat(2,1fr)}.grid-4,.trust-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.sidebar{position:static}.sitemap-tree{grid-template-columns:1fr}}
@media(max-width:640px){.grid-2,.grid-3,.grid-4,.reviews-grid,.news-grid,.scenario-grid,.download-grid,.trust-grid,.related-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.nav-links{display:none}.hero{padding:48px 0 40px}.section{padding:52px 0}}