:root{--brand:#ffa200;--brand2:#ff8a00;--navy:#0b1b2b;--navy2:#122b45;--teal:#00b8a9;--ink:#1a2332;--muted:#5a6b7f;--line:#e6ebf2;--bg:#f6f8fb;--card:#fff;--radius:16px;--shadow:0 10px 34px rgba(11,27,43,.08)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
/* top bar */
.topbar{background:var(--navy);color:#cfe0f2;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;min-height:38px}
.topbar a{color:#ffd27a;margin-left:16px}
.topbar .hint{color:#9fb4c9}
/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--navy)}
.logo img{width:36px;height:36px;border-radius:9px}
.logo .dot{color:var(--brand)}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:15px;font-weight:600;color:#33465b;position:relative;padding:6px 0}
.nav a:hover,.nav a.active{color:var(--brand2)}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:3px;background:var(--brand);border-radius:3px}
.nav-cta{display:flex;gap:10px;align-items:center}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:12px;font-weight:700;font-size:15px;line-height:1;cursor:pointer;transition:.2s;border:2px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 8px 22px rgba(255,162,0,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,162,0,.45)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy2)}
.btn-outline{border-color:var(--navy);color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-ghost{border-color:var(--line);color:#33465b;background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand2)}
.btn-lg{padding:15px 32px;font-size:16px;border-radius:14px}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}
.btn-block{width:100%}
/* hero */
.hero{background:radial-gradient(1100px 500px at 85% -10%,rgba(255,162,0,.18),transparent 60%),linear-gradient(180deg,#0b1b2b,#122b45);color:#fff;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;padding-top:64px;padding-bottom:64px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,162,0,.14);border:1px solid rgba(255,162,0,.4);color:#ffd27a;padding:6px 14px;border-radius:30px;font-size:13px;font-weight:600}
.hero h1{font-size:46px;line-height:1.18;margin:18px 0 14px;font-weight:900;letter-spacing:.5px}
.hero h1 .hl{color:var(--brand)}
.hero p.lead{color:#c6d6e8;font-size:17px;max-width:520px;margin-bottom:26px}
.hero-meta{display:flex;gap:26px;margin-top:26px;flex-wrap:wrap}
.hero-meta .m b{display:block;font-size:24px;color:#fff}
.hero-meta .m span{font-size:13px;color:#9fb4c9}
/* device mockup */
.mockup{position:relative}
.mockup-window{background:#0f2438;border:1px solid #2a4460;border-radius:16px;box-shadow:0 30px 70px rgba(0,0,0,.35);overflow:hidden}
.mockup-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#0a1a2a;border-bottom:1px solid #22374f}
.mockup-bar i{width:12px;height:12px;border-radius:50%;display:inline-block}
.mockup-bar .r{background:#ff5f57}.mockup-bar .y{background:#febc2e}.mockup-bar .g{background:#28c840}
.mockup-bar .url{flex:1;margin-left:8px;background:#13293f;border-radius:6px;color:#8fb4d4;font-size:12px;padding:5px 12px}
.mockup-body{padding:20px;display:grid;gap:16px}
.conn-card{background:linear-gradient(135deg,#ffa200,#ff8a00);border-radius:12px;padding:18px;display:flex;align-items:center;gap:16px;color:#fff}
.conn-card .ic{width:52px;height:52px;border-radius:12px;background:rgba(255,255,255,.22);display:grid;place-items:center;font-size:26px}
.conn-card b{display:block;font-size:18px}
.conn-card span{font-size:12px;opacity:.9}
.conn-card .big{margin-left:auto;text-align:right}
.conn-card .big b{font-size:26px}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.stat-tile{background:#132a40;border-radius:12px;padding:14px;text-align:center}
.stat-tile b{display:block;font-size:20px;color:#ffd27a}
.stat-tile span{font-size:12px;color:#8fb4d4}
.server-list{background:#132a40;border-radius:12px;padding:14px}
.server-list .s{display:flex;justify-content:space-between;align-items:center;padding:9px 6px;border-bottom:1px dashed #233a52;font-size:14px}
.server-list .s:last-child{border:0}
.server-list .s em{font-style:normal;color:#4cdc9a}
/* section */
.section{padding:72px 0}
.section-alt{background:#fff}
.section-head{text-align:center;max-width:720px;margin:0 auto 44px}
.section-head .tag{display:inline-block;color:var(--brand2);font-weight:700;font-size:14px;letter-spacing:1px;margin-bottom:8px}
.section-head h2{font-size:32px;font-weight:900;color:var(--navy);line-height:1.3}
.section-head p{color:var(--muted);margin-top:12px;font-size:16px}
/* notice */
.notice{background:linear-gradient(90deg,#fff8ea,#fff3d8);border:1px solid #ffe1a3;border-radius:var(--radius);padding:16px 20px;display:flex;gap:14px;align-items:center;margin:-36px auto 0;max-width:1200px;box-shadow:var(--shadow)}
.notice .ic{font-size:22px}
.notice b{color:#a36500}
.notice a{color:var(--brand2);font-weight:700}
/* feature */
.feature-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:28px;transition:.25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#ffd9a1}
.feature-card .ic{width:56px;height:56px;border-radius:14px;display:grid;place-items:center;font-size:28px;margin-bottom:16px;background:linear-gradient(135deg,#fff4df,#ffe6bd)}
.feature-card h3{font-size:19px;margin-bottom:10px;color:var(--navy)}
.feature-card p{color:var(--muted);font-size:15px}
.feature-card .num{color:#ffc966;font-weight:800;font-size:13px;letter-spacing:1px}
/* compare */
.compare-wrap{overflow-x:auto}
.compare-table{width:100%;border-collapse:collapse;min-width:640px;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.compare-table th,.compare-table td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--line);font-size:15px}
.compare-table thead th{background:var(--navy);color:#fff;font-weight:700}
.compare-table thead th.hl-col{background:linear-gradient(135deg,var(--brand),var(--brand2))}
.compare-table tbody tr:hover{background:#fff8ec}
.compare-table td:first-child{text-align:left;font-weight:600;color:#33465b}
.yes{color:#1dbf73;font-weight:700}.no{color:#c1ccda}
/* tabs (news) */
.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}
.tab{display:inline-block;padding:10px 22px;border-radius:30px;font-weight:700;font-size:15px;background:#fff;border:1px solid var(--line);color:#33465b}
.tab:hover{border-color:var(--brand)}
.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;display:flex;flex-direction:column;transition:.2s}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-card .thumb{aspect-ratio:16/9;background:#eef3f9;overflow:hidden}
.news-card .thumb img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:18px;flex:1;display:flex;flex-direction:column}
.news-card .cat{font-size:12px;color:var(--brand2);font-weight:700}
.news-card h3{font-size:17px;margin:8px 0;line-height:1.5}
.news-card h3 a:hover{color:var(--brand2)}
.news-card .date{font-size:13px;color:var(--muted);margin-top:auto}
/* reviews */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative}
.review-card .stars{color:#ffb300;font-size:18px;letter-spacing:2px;margin-bottom:12px}
.review-card p{color:#33465b;font-size:15px;margin-bottom:16px}
.review-card .who{display:flex;align-items:center;gap:12px}
.review-card .who .av{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#ffa200,#ff8a00);color:#fff;display:grid;place-items:center;font-weight:800}
.review-card .who b{display:block;font-size:15px}
.review-card .who span{font-size:13px;color:var(--muted)}
/* download */
.platform-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.platform-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;transition:.2s}
.platform-card:hover{border-color:var(--brand);transform:translateY(-4px);box-shadow:var(--shadow)}
.platform-card .ic{font-size:40px;margin-bottom:12px}
.platform-card h3{font-size:16px;margin-bottom:6px}
.platform-card span{display:block;font-size:12px;color:var(--muted);margin-bottom:14px}
/* trust */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.trust-item .ic{font-size:32px;margin-bottom:10px}
.trust-item b{display:block;font-size:16px;color:var(--navy)}
.trust-item span{font-size:13px;color:var(--muted)}
/* scenario */
.scenario-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scenario-card{background:var(--navy);color:#fff;border-radius:var(--radius);padding:24px}
.scenario-card .ic{font-size:30px;margin-bottom:12px}
.scenario-card h3{font-size:17px;margin-bottom:8px;color:#ffd27a}
.scenario-card p{font-size:14px;color:#c6d6e8}
/* faq */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:700;color:var(--navy);display:flex;justify-content:space-between;align-items:center;font-size:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:24px;color:var(--brand2);transition:.2s}
.faq-item[open] summary::after{content:"–"}
.faq-body{padding:0 22px 20px;color:#33465b;font-size:15px}
.faq-body ol{padding-left:20px}
.faq-body li{margin:8px 0}
.faq-body b{color:var(--brand2)}
/* CTA */
.cta{background:linear-gradient(120deg,#0b1b2b,#1b3a5e);color:#fff;text-align:center;border-radius:24px;padding:60px 30px}
.cta h2{font-size:32px;font-weight:900;margin-bottom:12px}
.cta p{color:#c6d6e8;margin-bottom:28px}
.cta .btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
/* footer */
.footer{background:#0a1726;color:#9fb4c9;padding:56px 0 24px;margin-top:0}
.footer .grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{display:block;color:#9fb4c9;margin:8px 0;font-size:14px}
.footer a:hover{color:#ffd27a}
.footer .brand p{font-size:14px;margin:12px 0;max-width:280px}
.footer-bottom{border-top:1px solid #1c2c40;margin-top:36px;padding-top:20px;text-align:center;font-size:13px;color:#6d8299}
/* breadcrumb */
.breadcrumb{background:#fff;border-bottom:1px solid var(--line)}
.breadcrumb .container{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);padding:14px 0}
.breadcrumb a{color:var(--brand2)}
.breadcrumb .sep{color:#c1ccda}
/* page hero */
.page-hero{background:linear-gradient(180deg,#0b1b2b,#122b45);color:#fff;text-align:center;padding:56px 20px}
.page-hero h1{font-size:36px;font-weight:900}
.page-hero p{color:#c6d6e8;margin-top:10px;font-size:16px}
/* article */
.article-layout{display:grid;grid-template-columns:1fr 320px;gap:36px;align-items:start;padding:40px 0}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px}
.article-main h1{font-size:30px;font-weight:900;line-height:1.35;color:var(--navy);margin:12px 0}
.article-meta{display:flex;gap:18px;color:var(--muted);font-size:13px;flex-wrap:wrap;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:20px}
.article-main .lead{font-size:17px;color:#33465b;background:#fff8ec;border-left:4px solid var(--brand);padding:14px 18px;border-radius:8px;margin-bottom:22px}
.article-main h2{font-size:23px;color:var(--navy);margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--brand2)}
.article-main p{margin-bottom:16px;color:#33465b;font-size:16px;text-align:justify}
.article-main .fig{margin:20px 0}
.article-main .fig img{border-radius:12px;width:100%}
.article-main .fig figcaption{font-size:13px;color:var(--muted);margin-top:8px;text-align:center}
.article-main table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.article-main table th{background:var(--navy);color:#fff;padding:10px 12px;text-align:left}
.article-main table td{border:1px solid var(--line);padding:10px 12px}
.article-main table tr:nth-child(even){background:#fafbfd}
.article-main blockquote{border-left:4px solid var(--brand);background:#fff8ec;padding:14px 18px;border-radius:8px;color:#5a4a1a;margin:18px 0;font-style:italic}
/* toc */
.toc{background:#f6f8fb;border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:24px}
.toc b{color:var(--navy);font-size:15px}
.toc ol{padding-left:20px;margin-top:8px}
.toc a{color:var(--brand2);font-size:14px}
/* sidebar */
.sidebar{display:grid;gap:24px;position:sticky;top:88px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.side-card h3{font-size:17px;color:var(--navy);margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--brand)}
.side-card ul{list-style:none}
.side-card ul li{margin:10px 0;font-size:14px}
.side-card ul li a:hover{color:var(--brand2)}
.side-card .hot b{color:var(--brand);margin-right:6px}
/* comments */
.comments{margin-top:30px}
.comments h3{font-size:20px;color:var(--navy);margin-bottom:18px}
.comment-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.comment-item .av{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#e8eef5,#d3deea);color:var(--navy);display:grid;place-items:center;font-weight:800;flex-shrink:0}
.comment-item b{display:block;font-size:14px}
.comment-item .t{font-size:12px;color:var(--muted)}
.comment-item p{font-size:14px;color:#33465b;margin-top:4px}
/* prev next */
.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:26px}
.prevnext a{background:#f6f8fb;border:1px solid var(--line);border-radius:12px;padding:16px;font-size:14px;color:var(--navy)}
.prevnext a:hover{border-color:var(--brand)}
.prevnext a small{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
.prevnext a.next{text-align:right}
/* sitemap */
.sitemap-links{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.sitemap-links h3{color:var(--navy);margin-bottom:12px;font-size:17px}
.sitemap-links a{display:block;color:#33465b;margin:7px 0;font-size:14px}
.sitemap-links a:hover{color:var(--brand2)}
/* 404 */
.e404{text-align:center;padding:120px 20px}
.e404 h1{font-size:120px;color:var(--brand);line-height:1;font-weight:900}
.e404 p{font-size:18px;color:var(--muted);margin:16px 0 28px}
/* responsive */
@media(max-width:960px){
.hero .container{grid-template-columns:1fr}
.feature-grid,.news-grid,.review-grid,.scenario-grid,.trust-grid{grid-template-columns:repeat(2,1fr)}
.platform-grid{grid-template-columns:repeat(2,1fr)}
.article-layout{grid-template-columns:1fr}
.sidebar{position:static}
.footer .grid{grid-template-columns:1fr 1fr}
.sitemap-links{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
.hero h1{font-size:32px}
.feature-grid,.news-grid,.review-grid,.scenario-grid,.trust-grid,.platform-grid,.footer .grid,.sitemap-links{grid-template-columns:1fr}
.nav{display:none}
.section{padding:48px 0}
}