:root{--navy:#0b1f3a;--navy2:#122a4d;--cyan:#00d4ff;--teal:#00e5c7;--orange:#ff8a3d;--ink:#1a2b45;--ink2:#5a6b85;--bg:#f5f8fc;--line:#e4ecf5;--white:#fff;--grad:linear-gradient(135deg,#00d4ff,#00e5c7);--shadow:0 12px 40px rgba(11,31,58,.12)}
*{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","Microsoft YaHei","Helvetica Neue",Arial,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%;height:auto;display:block}
ul,ol{list-style:none}
.container{width:min(1180px,92%);margin:0 auto}
.skip{position:absolute;left:-9999px;top:0;background:var(--cyan);color:#fff;padding:8px 14px;z-index:999}
.skip:focus{left:10px;top:10px}

/* 导航 */
.nav{position:sticky;top:0;z-index:100;background:rgba(11,31,58,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px}
.brand img{width:34px;height:34px;border-radius:8px}
.brand small{display:block;font-size:11px;font-weight:400;color:#8fb3d9;line-height:1.1}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{color:#cfe0f2;padding:8px 13px;border-radius:8px;font-size:14px;transition:.2s}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.1)}
.nav-cta{background:var(--grad);color:#04202b!important;font-weight:700;padding:9px 18px!important;border-radius:22px}
.menu-btn{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}
@media(max-width:900px){.nav-links{display:none}.menu-btn{display:block}}

/* Hero */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,#1d4a7a 0%,transparent 60%),linear-gradient(160deg,#081627,#0b1f3a 55%,#0e2a50);color:#fff;overflow:hidden;padding:64px 0 90px}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:44px 44px;opacity:.4;pointer-events:none}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(0,212,255,.12);border:1px solid rgba(0,212,255,.3);color:#7fe8ff;padding:6px 14px;border-radius:20px;font-size:13px;margin-bottom:20px}
.hero h1{font-size:clamp(30px,4vw,50px);line-height:1.2;margin-bottom:18px;letter-spacing:.5px}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{color:#bcd2ea;font-size:17px;max-width:520px;margin-bottom:28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:28px;font-weight:700;font-size:15px;transition:.2s;border:1px solid transparent}
.btn-p{background:var(--grad);color:#04202b;box-shadow:0 10px 30px rgba(0,212,255,.35)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(0,212,255,.5)}
.btn-s{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.2)}
.btn-s:hover{background:rgba(255,255,255,.16)}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-stats b{display:block;font-size:26px;color:#fff}
.hero-stats span{color:#8fb3d9;font-size:13px}

/* 客户端模拟器 */
.sim{background:#fff;border-radius:18px;box-shadow:0 30px 70px rgba(0,0,0,.4);overflow:hidden;border:1px solid rgba(255,255,255,.12)}
.sim-bar{display:flex;align-items:center;gap:8px;padding:13px 16px;background:#f1f5fb;border-bottom:1px solid var(--line)}
.sim-bar i{width:12px;height:12px;border-radius:50%;display:inline-block}
.sim-bar .r{background:#ff5f57}.sim-bar .y{background:#febc2e}.sim-bar .g{background:#28c840}
.sim-bar span{flex:1;text-align:center;font-size:12px;color:#7a8aa5}
.sim-body{padding:22px}
.sim-node{display:flex;align-items:center;justify-content:space-between;padding:13px 14px;border:1px solid var(--line);border-radius:12px;margin-bottom:10px}
.sim-node b{display:flex;align-items:center;gap:9px;font-size:14px;color:#1a2b45}
.sim-node b .flag{width:22px;height:22px;border-radius:50%;background:var(--grad);display:inline-block}
.sim-node span{font-size:12px;color:#00b894}
.sim-meter{background:var(--navy);border-radius:12px;padding:16px;color:#fff;text-align:center;margin:14px 0}
.sim-meter .num{font-size:40px;font-weight:800;line-height:1}
.sim-meter .unit{font-size:14px;color:#8fb3d9}
.sim-meter .bar{height:6px;background:rgba(255,255,255,.15);border-radius:3px;margin-top:12px;overflow:hidden}
.sim-meter .bar i{display:block;height:100%;width:76%;background:var(--grad);border-radius:3px}
.sim-btn{display:block;text-align:center;background:var(--grad);color:#04202b;font-weight:700;padding:14px;border-radius:12px}
.sim-foot{display:flex;justify-content:space-between;font-size:12px;color:#7a8aa5;padding:14px 16px 16px;background:#fff}

/* 通用 section */
.sec{padding:78px 0}
.sec-alt{background:#fff}
.sec-head{text-align:center;max-width:700px;margin:0 auto 48px}
.sec-head .kicker{display:inline-block;color:var(--cyan);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:clamp(24px,3vw,36px);color:var(--navy);line-height:1.3;margin-bottom:12px}
.sec-head p{color:var(--ink2);font-size:16px}

/* 公告 */
.notice{background:linear-gradient(135deg,#00d4ff,#00e5c7);color:#04202b;padding:14px 0;font-size:14px}
.notice a{font-weight:700;text-decoration:underline}

/* 核心功能 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;transition:.25s}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#bdeefc}
.feat .ico{width:56px;height:56px;border-radius:14px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px}
.feat h3{font-size:19px;color:var(--navy);margin-bottom:10px}
.feat p{color:var(--ink2);font-size:14px}
@media(max-width:900px){.feat-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.feat-grid{grid-template-columns:1fr}}

/* 对比表 */
.compare{overflow-x:auto;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
.compare table{width:100%;border-collapse:collapse;min-width:640px}
.compare th,.compare td{padding:16px 18px;text-align:center;font-size:14px;border-bottom:1px solid var(--line)}
.compare thead th{background:var(--navy);color:#fff;font-weight:700}
.compare thead th.hl{background:var(--grad);color:#04202b}
.compare td:first-child,.compare th:first-child{text-align:left;font-weight:600;color:var(--navy)}
.compare tbody tr:last-child td{border-bottom:none}
.compare .ok{color:#00b894;font-weight:700}.compare .no{color:#c9d4e3}

/* 新闻 tab */
.tabs{display:flex;justify-content:center;gap:8px;margin-bottom:32px;flex-wrap:wrap}
.tab{display:inline-block;padding:9px 20px;border-radius:22px;background:#e8f0f9;color:var(--ink2);font-size:14px;cursor:pointer}
.tab.on{background:var(--grad);color:#04202b;font-weight:700}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.25s}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-card img{height:160px;width:100%;object-fit:cover}
.news-card .body{padding:18px}
.news-card .meta{font-size:12px;color:#9aabbf;margin-bottom:8px}
.news-card h3{font-size:16px;line-height:1.5;margin-bottom:8px}
.news-card h3 a{color:var(--navy)}
.news-card h3 a:hover{color:var(--cyan)}
.news-card p{font-size:13px;color:var(--ink2)}
@media(max-width:900px){.news-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.news-grid{grid-template-columns:1fr}}

/* 评论 */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px}
.rev .stars{color:#ffb400;letter-spacing:2px;margin-bottom:12px}
.rev p{color:var(--ink2);font-size:14px;margin-bottom:16px}
.rev .who{display:flex;align-items:center;gap:10px}
.rev .who b{width:40px;height:40px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px}
.rev .who span{font-size:13px;color:#9aabbf}
@media(max-width:900px){.rev-grid{grid-template-columns:1fr}}

/* 下载区 */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px 18px;text-align:center;transition:.25s}
.dl:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#bdeefc}
.dl .ico{width:60px;height:60px;border-radius:16px;background:var(--navy);display:flex;align-items:center;justify-content:center;font-size:28px;margin:0 auto 14px}
.dl h3{font-size:16px;color:var(--navy);margin-bottom:6px}
.dl span{font-size:12px;color:var(--ink2);display:block;margin-bottom:14px}
.dl a.btn{background:var(--grad);color:#04202b;padding:9px 20px;font-size:13px}
@media(max-width:900px){.dl-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.dl-grid{grid-template-columns:1fr 1fr}}

/* 信任背书 */
.trust{background:var(--navy);color:#fff;padding:60px 0}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;text-align:center}
.trust b{font-size:34px;display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:6px}
.trust span{color:#8fb3d9;font-size:14px}
@media(max-width:700px){.trust-grid{grid-template-columns:1fr 1fr}}

/* 应用场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene{position:relative;border-radius:16px;overflow:hidden;min-height:200px;display:flex;align-items:flex-end;padding:24px;color:#fff;background:var(--navy2)}
.scene h3{font-size:19px;margin-bottom:6px}
.scene p{font-size:13px;color:#cfe0f2}
@media(max-width:900px){.scene-grid{grid-template-columns:1fr}}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:700;color:var(--navy);font-size:16px;list-style:none;position:relative;padding-right:52px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:24px;color:var(--cyan);transition:.2s}
.faq-item[open] summary::after{content:"–"}
.faq-item .ans{padding:0 24px 22px;color:var(--ink2);font-size:14px}
.faq-item .ans ol{padding-left:20px;list-style:decimal}
.faq-item .ans li{margin-bottom:8px}
.faq-item .ans li b{color:var(--navy)}

/* CTA */
.cta{background:linear-gradient(135deg,#081627,#0b1f3a);color:#fff;text-align:center;padding:80px 0;border-radius:0}
.cta h2{font-size:clamp(26px,3.5vw,40px);margin-bottom:14px}
.cta p{color:#bcd2ea;margin-bottom:28px}

/* 页脚 */
.footer{background:#061527;color:#8fb3d9;padding:60px 0 30px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:36px}
.foot-grid h4{color:#fff;font-size:15px;margin-bottom:16px}
.foot-grid a{display:block;color:#8fb3d9;margin-bottom:9px;font-size:13px}
.foot-grid a:hover{color:var(--cyan)}
.friends{margin-bottom:30px;padding:20px;background:rgba(255,255,255,.03);border-radius:12px}
.friends b{color:#fff;display:block;margin-bottom:10px}
.friends a{color:#8fb3d9;margin-right:16px;font-size:13px;display:inline-block;margin-bottom:6px}
.friends a:hover{color:var(--cyan)}
.copyright{border-top:1px solid rgba(255,255,255,.08);padding-top:22px;font-size:12px;color:#5f7a9a;text-align:center}
@media(max-width:900px){.foot-grid{grid-template-columns:1fr 1fr}}

/* 新闻列表页 */
.page-hero{background:linear-gradient(160deg,#081627,#0b1f3a);color:#fff;padding:60px 0 70px;text-align:center}
.page-hero h1{font-size:clamp(28px,4vw,44px);margin-bottom:14px}
.page-hero p{color:#bcd2ea;max-width:640px;margin:0 auto}
.crumb{font-size:13px;color:#8fb3d9;margin-bottom:14px}
.crumb a{color:#7fe8ff}
.crumb a:hover{text-decoration:underline}

/* 新闻详情 */
.article-wrap{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:40px;box-shadow:var(--shadow)}
.article h1{font-size:clamp(24px,3vw,34px);color:var(--navy);line-height:1.4;margin-bottom:16px}
.article .meta{display:flex;gap:18px;flex-wrap:wrap;font-size:13px;color:#9aabbf;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:26px}
.article .meta b{color:var(--cyan);font-weight:600}
.article .content{font-size:16px;color:#2a3b55;line-height:1.9}
.article .content p{margin-bottom:18px}
.article .content h2{font-size:22px;color:var(--navy);margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--cyan)}
.article .content h3{font-size:18px;color:var(--navy);margin:24px 0 10px}
.article .content img{border-radius:12px;margin:20px 0}
.article .content blockquote{border-left:4px solid var(--orange);background:#fff7ef;padding:16px 20px;border-radius:8px;margin:20px 0;color:#5a4a3a;font-style:italic}
.article .content ul,.article .content ol{padding-left:24px;margin-bottom:18px}
.article .content ul{list-style:disc}.article .content ol{list-style:decimal}
.article .content li{margin-bottom:8px}
.toc{background:#f1f6fc;border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:20px 0}
.toc b{display:block;color:var(--navy);margin-bottom:10px}
.toc a{display:block;color:var(--ink2);font-size:14px;margin-bottom:6px}
.toc a:hover{color:var(--cyan)}
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line)}
.pager a{flex:1;background:#f1f6fc;border:1px solid var(--line);border-radius:12px;padding:16px;font-size:14px;color:var(--ink)}
.pager a:hover{border-color:var(--cyan)}
.pager a span{display:block;font-size:12px;color:#9aabbf;margin-bottom:4px}
.sidebar>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:24px}
.sidebar h4{color:var(--navy);font-size:16px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--cyan)}
.sidebar .hot a{display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:13px;color:var(--ink2)}
.sidebar .hot a:hover{color:var(--cyan)}
.sidebar .hot a:last-child{border-bottom:none}
.sidebar .hot i{font-style:normal;color:var(--orange);font-weight:800}
.sidebar .cat a{display:block;padding:8px 0;color:var(--ink2);font-size:14px;border-bottom:1px dashed var(--line)}
.sidebar .cat a:hover{color:var(--cyan)}
.comments{margin-top:36px;padding-top:28px;border-top:1px solid var(--line)}
.comments h3{color:var(--navy);font-size:20px;margin-bottom:20px}
.comment{background:#f8fafd;border:1px solid var(--line);border-radius:12px;padding:18px;margin-bottom:14px}
.comment .who{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.comment .who b{width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px}
.comment .who span{font-size:12px;color:#9aabbf}
.comment p{font-size:14px;color:var(--ink2)}
@media(max-width:1000px){.article-wrap{grid-template-columns:1fr}.sidebar{display:none}}

/* 404 */
.e404{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;background:linear-gradient(160deg,#081627,#0b1f3a);color:#fff}
.e404 h1{font-size:110px;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:14px}
.e404 p{color:#bcd2ea;margin-bottom:28px}