:root{--navy:#0a1628;--navy2:#0f2038;--navy3:#132a45;--card:#152c4a;--accent:#00d9c0;--accent2:#38bdf8;--gold:#fbbf24;--red:#f87171;--bg:#f5f8fc;--text:#e8eef7;--muted:#8ca3c0;--ink:#14243a;--inkmuted:#5b6b85;--line:#dbe4f0;--radius:16px;--shadow:0 12px 40px rgba(10,22,40,.12)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:70px 0}
.section.alt{background:#fff}
.muted{color:var(--inkmuted)}
.center{text-align:center}
/* 顶部导航 */
.topbar{background:var(--navy);color:var(--text);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.2)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:#fff}
.brand img{width:34px;height:34px;border-radius:8px}
.brand span em{color:var(--accent);font-style:normal}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:#c9d7ec;font-size:15px;font-weight:500;padding:6px 2px;position:relative}
.nav a:hover,.nav a.active{color:#fff}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:2px;background:var(--accent);border-radius:2px}
.nav-cta{background:var(--accent);color:var(--navy)!important;padding:8px 18px!important;border-radius:20px;font-weight:700}
.nav-cta:hover{filter:brightness(1.05)}
/* Hero */
.hero{background:radial-gradient(1200px 500px at 70% -10%,#0e2c4d 0%,transparent 60%),linear-gradient(160deg,#0a1628 0%,#0f2038 60%,#0d1f36 100%);color:var(--text);padding:70px 0 90px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(56,189,248,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(56,189,248,.05) 1px,transparent 1px);background-size:48px 48px;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;position:relative;z-index:2}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;color:#fff}
.hero h1 em{color:var(--accent);font-style:normal}
.hero .sub{margin:20px 0 28px;font-size:18px;color:#b7c8de;max-width:540px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:26px;font-weight:700;font-size:16px;transition:.2s;cursor:pointer;border:none}
.btn-primary{background:var(--accent);color:var(--navy)}
.btn-primary:hover{box-shadow:0 8px 24px rgba(0,217,192,.4);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.15)}
.hero-meta{display:flex;gap:26px;margin-top:30px;flex-wrap:wrap}
.hero-meta .hm{display:flex;flex-direction:column}
.hero-meta .hm b{font-size:24px;color:#fff}
.hero-meta .hm span{font-size:13px;color:var(--muted)}
/* 客户端模拟器 */
.simulator{background:#0d1c31;border:1px solid rgba(56,189,248,.25);border-radius:18px;box-shadow:0 24px 60px rgba(0,0,0,.45);overflow:hidden}
.sim-title{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#0a1426;border-bottom:1px solid rgba(255,255,255,.08)}
.sim-title .dot{width:11px;height:11px;border-radius:50%}
.sim-title .d1{background:#ff5f57}.sim-title .d2{background:#febc2e}.sim-title .d3{background:#28c840}
.sim-title .appname{margin-left:10px;font-size:13px;color:#9fb3cc}
.sim-body{padding:18px}
.sim-status{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(120deg,#0f3b3a,#0e2c4d);border-radius:12px;padding:16px;margin-bottom:16px}
.sim-status .st{display:flex;align-items:center;gap:10px}
.sim-status .ping{width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(0,217,192,.25);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}
.sim-status .loc{color:#fff;font-weight:600;font-size:15px}
.sim-status .loc small{display:block;color:var(--muted);font-weight:400;font-size:12px}
.sim-connect{background:var(--accent);color:var(--navy);font-weight:800;border-radius:22px;padding:11px 26px;text-align:center;font-size:15px}
.sim-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.sim-metric{background:#12263f;border-radius:10px;padding:12px;text-align:center}
.sim-metric b{display:block;color:#fff;font-size:18px}
.sim-metric span{font-size:12px;color:var(--muted)}
.sim-graph{background:#12263f;border-radius:10px;padding:14px;margin-bottom:16px}
.sim-graph .glabel{font-size:12px;color:var(--muted);margin-bottom:8px;display:flex;justify-content:space-between}
.sim-graph .bars{display:flex;align-items:flex-end;gap:5px;height:60px}
.sim-graph .bars i{flex:1;background:linear-gradient(180deg,var(--accent2),var(--accent));border-radius:3px;opacity:.85}
.sim-servers{display:flex;flex-direction:column;gap:8px}
.sim-server{display:flex;align-items:center;justify-content:space-between;background:#12263f;border-radius:10px;padding:10px 14px;font-size:14px;color:#c9d7ec}
.sim-server .flag{font-size:18px}
.sim-server .ms{color:var(--accent);font-weight:600}
.sim-server.active{border:1px solid var(--accent)}
/* 公告区 */
.notice{background:linear-gradient(90deg,#0f3b3a,#0e2c4d);border:1px solid rgba(0,217,192,.3);border-radius:12px;padding:16px 22px;display:flex;align-items:center;gap:14px;color:#dff5ef;margin-top:-40px;position:relative;z-index:5;box-shadow:0 8px 30px rgba(0,0,0,.15)}
.notice .badge{background:var(--accent);color:var(--navy);font-weight:700;font-size:12px;padding:3px 10px;border-radius:14px;white-space:nowrap}
/* 区块标题 */
.sec-head{text-align:center;max-width:680px;margin:0 auto 46px}
.sec-head .kicker{display:inline-block;background:rgba(0,217,192,.12);color:#0c8f7c;font-weight:700;font-size:13px;padding:5px 16px;border-radius:20px;margin-bottom:14px}
.sec-head h2{font-size:34px;font-weight:800;color:var(--navy);margin-bottom:12px}
.sec-head p{color:var(--inkmuted);font-size:16px}
.hero .sec-head h2{color:#fff}
.hero .sec-head p{color:#b7c8de}
/* 卖点 */
.points-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.point{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.25s}
.point:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.point .icon{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,var(--accent),var(--accent2));display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px;color:#fff}
.point h3{font-size:20px;color:var(--navy);margin-bottom:10px}
.point p{color:var(--inkmuted);font-size:15px}
/* 核心功能 */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;position:relative;overflow:hidden}
.feature .num{position:absolute;right:18px;top:10px;font-size:64px;font-weight:800;color:#eef4fb;line-height:1}
.feature .icon{width:52px;height:52px;border-radius:12px;background:rgba(0,217,192,.14);color:#0c8f7c;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px}
.feature h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.feature p{color:var(--inkmuted);font-size:15px}
/* 对比表 */
.cmp-wrap{overflow-x:auto;background:#fff;border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
table.cmp{width:100%;border-collapse:collapse;min-width:640px}
table.cmp th,table.cmp td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line);font-size:15px}
table.cmp thead th{background:var(--navy);color:#fff;font-weight:700}
table.cmp thead th.hl{background:var(--accent);color:var(--navy)}
table.cmp tbody td:first-child{text-align:left;font-weight:600;color:var(--navy)}
table.cmp .yes{color:#0c8f7c;font-weight:700}
table.cmp .no{color:#b0bccd}
table.cmp tbody tr:hover{background:#f7fafd}
/* 新闻 */
.news-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.news-tab{background:#fff;border:1px solid var(--line);border-radius:22px;padding:8px 20px;font-weight:600;color:var(--inkmuted);font-size:14px}
.news-tab.on{background:var(--navy);color:#fff;border-color:var(--navy)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;display:block}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.news-card .thumb{height:170px;background:linear-gradient(135deg,#0e2c4d,#00d9c0);display:flex;align-items:center;justify-content:center;font-size:44px}
.news-card .body{padding:20px}
.news-card .cat{font-size:12px;color:#0c8f7c;font-weight:700}
.news-card h3{font-size:17px;color:var(--navy);margin:8px 0;line-height:1.5}
.news-card .meta{font-size:12px;color:var(--inkmuted)}
/* 评论 */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.review .stars{color:var(--gold);letter-spacing:2px;font-size:18px;margin-bottom:12px}
.review p{color:var(--inkmuted);font-size:15px;margin-bottom:16px}
.review .user{display:flex;align-items:center;gap:12px}
.review .avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--accent2),var(--accent));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}
.review .user b{display:block;color:var(--navy);font-size:14px}
.review .user span{font-size:12px;color:var(--inkmuted)}
/* 下载区 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 16px;text-align:center;transition:.25s;display:block}
.dl-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--accent)}
.dl-card .ico{font-size:44px;margin-bottom:12px}
.dl-card b{display:block;color:var(--navy);font-size:16px;margin-bottom:6px}
.dl-card span{font-size:13px;color:var(--inkmuted)}
/* 信任背书 */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.trust .ico{font-size:34px;margin-bottom:10px}
.trust b{display:block;color:var(--navy);margin-bottom:6px}
.trust span{font-size:13px;color:var(--inkmuted)}
/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene{background:linear-gradient(160deg,#0f2038,#0a1628);color:var(--text);border-radius:var(--radius);padding:30px 26px}
.scene .icon{font-size:34px;margin-bottom:14px}
.scene h3{font-size:19px;color:#fff;margin-bottom:10px}
.scene p{color:#b7c8de;font-size:15px}
/* FAQ */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:700;color:var(--navy);font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:24px;color:var(--accent);font-weight:400;transition:.2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-body{padding:0 24px 22px;color:var(--inkmuted);font-size:15px}
.faq-item .faq-body ol{padding-left:20px;margin-top:8px}
.faq-item .faq-body ol li{margin-bottom:8px}
.faq-cats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.faq-cat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;transition:.2s;display:block}
.faq-cat:hover{border-color:var(--accent);box-shadow:var(--shadow)}
.faq-cat .icon{font-size:30px;margin-bottom:10px}
.faq-cat h3{color:var(--navy);font-size:17px;margin-bottom:6px}
.faq-cat span{color:var(--inkmuted);font-size:13px}
/* CTA */
.cta{background:radial-gradient(900px 400px at 50% -20%,#0e2c4d,transparent 60%),linear-gradient(160deg,#0a1628,#0f2038);color:#fff;text-align:center;padding:80px 0;border-radius:0}
.cta h2{font-size:36px;font-weight:800;margin-bottom:14px}
.cta p{color:#b7c8de;margin-bottom:28px;font-size:17px}
/* 页脚 */
.footer{background:#081120;color:#9fb3cc;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:32px;margin-bottom:36px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer .f-brand{font-size:20px;font-weight:700;color:#fff;display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer .f-brand img{width:28px;height:28px;border-radius:6px}
.footer p{font-size:14px;line-height:1.8}
.footer ul{list-style:none}
.footer ul li{margin-bottom:10px}
.footer ul a{font-size:14px;color:#9fb3cc}
.footer ul a:hover{color:var(--accent)}
.friend-links{display:flex;flex-wrap:wrap;gap:8px;border-top:1px solid rgba(255,255,255,.08);padding-top:24px;margin-bottom:24px}
.friend-links a{font-size:12px;color:#6f87a6;background:rgba(255,255,255,.04);padding:4px 12px;border-radius:14px}
.friend-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:20px;text-align:center;font-size:13px;color:#5b708e}
/* 面包屑 */
.crumbs{background:var(--navy);color:#9fb3cc;padding:18px 0;font-size:14px}
.crumbs a{color:#c9d7ec}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{margin:0 8px;color:#4a5f7c}
/* 页面通用 hero 头 */
.page-hero{background:linear-gradient(160deg,#0a1628,#0f2038);color:#fff;padding:52px 0;text-align:center}
.page-hero h1{font-size:38px;font-weight:800}
.page-hero p{color:#b7c8de;margin-top:10px;font-size:16px}
/* 文章详情 */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start}
.article-body{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px}
.article-body h1{font-size:30px;color:var(--navy);line-height:1.4;margin-bottom:14px}
.article-body h2{font-size:22px;color:var(--navy);margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--accent)}
.article-body h3{font-size:18px;color:var(--navy);margin:20px 0 10px}
.article-body p{margin-bottom:16px;color:#33415c;font-size:16px}
.article-body .lead{font-size:18px;color:var(--inkmuted);line-height:1.9}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0}
.article-body table th,.article-body table td{padding:12px 14px;border:1px solid var(--line);font-size:14px;text-align:left}
.article-body table th{background:var(--navy);color:#fff}
.article-body table tr:nth-child(even){background:#f7fafd}
.article-meta{display:flex;gap:16px;align-items:center;color:var(--inkmuted);font-size:13px;margin-bottom:20px;flex-wrap:wrap}
.article-meta .tag{background:rgba(0,217,192,.14);color:#0c8f7c;padding:3px 12px;border-radius:14px;font-weight:600}
.article-img{margin:22px 0;border-radius:12px;overflow:hidden;border:1px solid var(--line)}
.article-img img{width:100%}
.article-img figcaption{font-size:12px;color:var(--inkmuted);text-align:center;padding:8px}
.toc{background:#f7fafd;border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:20px 0}
.toc h4{color:var(--navy);margin-bottom:10px}
.toc ol{padding-left:20px}
.toc li{margin-bottom:6px;font-size:15px}
.toc a{color:#0c8f7c}
.sidebar{display:flex;flex-direction:column;gap:22px;position:sticky;top:86px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.side-card h4{color:var(--navy);font-size:16px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--accent)}
.side-card ul{list-style:none}
.side-card ul li{margin-bottom:10px;font-size:14px}
.side-card ul a{color:var(--inkmuted)}
.side-card ul a:hover{color:#0c8f7c}
.comments{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;margin-top:30px}
.comments h3{color:var(--navy);font-size:20px;margin-bottom:20px}
.comment{border-bottom:1px solid var(--line);padding:16px 0}
.comment:last-child{border:none}
.comment .c-head{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.comment .c-head b{color:var(--navy);font-size:14px}
.comment .c-head span{font-size:12px;color:var(--inkmuted)}
.comment p{color:#33415c;font-size:15px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:26px}
.article-nav a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;font-size:14px;color:var(--navy);flex:1}
.article-nav a:hover{border-color:var(--accent)}
.article-nav a.next{text-align:right}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:20px}
/* 404 */
.err404{min-height:70vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:var(--navy);color:#fff;padding:60px 20px}
.err404 h1{font-size:120px;font-weight:800;color:var(--accent);line-height:1}
.err404 p{font-size:20px;margin:20px 0;color:#b7c8de}
.err404 .countdown{color:var(--accent);font-weight:700;font-size:28px}
/* 响应式 */
@media(max-width:960px){.hero-grid{grid-template-columns:1fr}.nav{display:none}.features-grid,.points-grid,.reviews-grid,.news-grid,.scene-grid,.trust-grid,.related{grid-template-columns:1fr 1fr}.dl-grid{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:1fr}.sidebar{position:static}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.features-grid,.points-grid,.reviews-grid,.news-grid,.scene-grid,.trust-grid,.related,.dl-grid,.faq-cats{grid-template-columns:1fr}.hero h1{font-size:34px}.section{padding:46px 0}.footer-grid{grid-template-columns:1fr}}
/* 打印与可访问性 */
.skip{position:absolute;left:-9999px}
.skip:focus{left:0;top:0;background:var(--accent);color:var(--navy);padding:10px 16px;z-index:999}