/* roulang page: index */
:root{
  --brand:#1d4ed8;
  --brand-deep:#16368f;
  --brand-soft:#eef3ff;
  --accent:#f59e0b;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#f6f8fc;
  --card:#ffffff;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(15,23,42,.05);
  --shadow:0 14px 36px rgba(15,23,42,.08);
  --shadow-lg:0 26px 64px rgba(15,23,42,.16);
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--ink);}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ===== 顶部公告条 ===== */
.topbar{background:#0d2452;color:#c3d4f2;font-size:13px;}
.topbar-inner{display:flex;align-items:center;gap:12px;min-height:42px;flex-wrap:wrap;}
.topbar-badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:999px;background:rgba(245,158,11,.16);color:#fbbf24;font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;}
.topbar p{flex:1 1 auto;min-width:0;margin:0;color:#b9cbea;}
.topbar-link{color:#ffffff;font-weight:600;white-space:nowrap;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:1px;}
.topbar-link:hover{color:#fbbf24;border-color:#fbbf24;}

/* ===== 导航 ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(15,23,42,.04);}
.header-inner{display:flex;align-items:center;gap:26px;min-height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(145deg,#2563eb,#16368f);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;box-shadow:0 8px 18px rgba(29,78,216,.32);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap;}
.brand-text small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.03em;margin-top:2px;}
.main-nav{display:flex;align-items:center;gap:4px;flex:0 0 auto;}
.main-nav a{padding:8px 15px;border-radius:999px;font-size:14.5px;font-weight:500;color:var(--ink-2);white-space:nowrap;}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand);}
.main-nav a.active{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(29,78,216,.22);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{display:flex;align-items:center;gap:7px;background:#f1f5fb;border:1px solid var(--line);border-radius:999px;padding:6px 8px 6px 14px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;}
.search-box:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(29,78,216,.12);}
.search-box input{border:none;background:transparent;outline:none;width:118px;font-size:13.5px;padding:0;}
.search-box button{border:none;background:var(--brand);color:#fff;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;cursor:pointer;font-size:13px;transition:background .2s ease;}
.search-box button:hover{background:var(--brand-deep);}
.menu-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;padding:0;place-items:center;}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:3px auto;border-radius:2px;transition:.25s;}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 26px rgba(29,78,216,.26);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 16px 32px rgba(29,78,216,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px rgba(29,78,216,.24);}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(29,78,216,.3);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);}
.btn-sm{padding:9px 20px;font-size:13.5px;}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.32);}
.btn-light:hover{background:rgba(255,255,255,.2);transform:translateY(-2px);}

/* ===== Hero ===== */
.hero{position:relative;background:#0a1a3c;color:#fff;overflow:hidden;padding:78px 0 92px;}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(880px 460px at 82% 12%,rgba(37,99,235,.5),transparent 62%),radial-gradient(680px 420px at 8% 88%,rgba(14,165,233,.28),transparent 60%);}
.hero-inner{position:relative;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:56px;align-items:center;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);font-size:13px;color:#c7d9ff;letter-spacing:.02em;}
.hero-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:#34d399;}
.hero h1{margin:20px 0 0;font-size:40px;line-height:1.28;font-weight:800;letter-spacing:-.4px;}
.hero h1 em{font-style:normal;color:#8ab4ff;}
.hero-desc{margin:20px 0 0;font-size:15.5px;line-height:1.9;color:#bfd0ee;max-width:600px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:30px;}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:#a8bfe4;}
.hero-points li::before{content:"";width:15px;height:15px;border-radius:50%;background:rgba(52,211,153,.18);border:1px solid rgba(52,211,153,.6);flex:0 0 auto;background-image:linear-gradient(45deg,transparent 45%,#34d399 45%,#34d399 55%,transparent 55%);}

.hero-panel{min-width:0;}
.device-card{background:linear-gradient(170deg,#122a5c,#0b1c3f);border:1px solid rgba(120,160,255,.24);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:22px 22px 20px;position:relative;}
.device-head{display:flex;align-items:center;gap:7px;padding-bottom:16px;border-bottom:1px solid rgba(120,160,255,.16);}
.device-head .dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.24);}
.device-head .dot:nth-child(1){background:#f87171;}
.device-head .dot:nth-child(2){background:#fbbf24;}
.device-head .dot:nth-child(3){background:#34d399;}
.device-title{margin-left:8px;font-size:13px;color:#9db6e0;letter-spacing:.02em;}
.device-list{margin-top:6px;}
.device-list li{display:flex;align-items:flex-start;gap:14px;padding:15px 0;border-bottom:1px dashed rgba(120,160,255,.16);}
.device-list li:last-child{border-bottom:none;}
.device-list .di{flex:0 0 auto;width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:13px;font-weight:700;color:#bfd6ff;background:rgba(37,99,235,.24);border:1px solid rgba(120,160,255,.28);}
.device-list strong{display:block;font-size:14.5px;color:#eaf1ff;font-weight:600;}
.device-list p{margin:3px 0 0;font-size:13px;line-height:1.65;color:#9fb6db;}
.device-foot{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;padding-top:16px;border-top:1px solid rgba(120,160,255,.16);}
.chip{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:12px;color:#c9dbff;background:rgba(255,255,255,.08);border:1px solid rgba(120,160,255,.24);}

/* ===== 通用板块 ===== */
.section{padding:74px 0;}
.section.alt{background:#fff;}
.section-head{max-width:760px;margin:0 auto 44px;text-align:center;}
.eyebrow{display:inline-block;padding:5px 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:600;letter-spacing:.04em;}
.section-title{margin-top:16px;font-size:29px;line-height:1.36;font-weight:800;letter-spacing:-.3px;color:var(--ink);}
.section-desc{margin-top:14px;font-size:15px;line-height:1.85;color:var(--muted);}
.section-head.left{text-align:left;margin-left:0;}

/* ===== 下载区 ===== */
.download{background:#fff;padding:64px 0 74px;border-bottom:1px solid var(--line);}
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.dl-card{min-width:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px 26px;box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;display:flex;flex-direction:column;}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.28);}
.dl-icon{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;font-size:22px;background:var(--brand-soft);color:var(--brand);margin-bottom:18px;}
.dl-card h3{font-size:18px;font-weight:700;color:var(--ink);}
.dl-card p{margin:10px 0 20px;font-size:13.8px;line-height:1.8;color:var(--muted);flex:1 1 auto;}
.dl-file{display:block;margin-bottom:16px;font-size:12px;color:#8b9ab3;letter-spacing:.02em;word-break:break-word;}
.dl-card .btn{width:100%;}
.download-note{margin-top:26px;font-size:13px;color:var(--muted);text-align:center;line-height:1.8;}

/* ===== 指标看板 ===== */
.stat-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.stat-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease;}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.stat-label{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--muted);}
.stat-label span{width:8px;height:8px;border-radius:3px;background:var(--brand);}
.stat-main{margin-top:12px;font-size:20px;font-weight:800;color:var(--ink);letter-spacing:-.2px;}
.stat-sub{margin-top:8px;font-size:13px;line-height:1.7;color:var(--muted);}

/* ===== 服务矩阵 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.feature-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.26);}
.feature-card .fi{width:46px;height:46px;border-radius:13px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:19px;margin-bottom:16px;}
.feature-card h3{font-size:17px;font-weight:700;color:var(--ink);}
.feature-card p{margin-top:10px;font-size:13.8px;line-height:1.8;color:var(--muted);}

/* ===== 使用场景 ===== */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.scene-card{min-width:0;background:linear-gradient(180deg,#ffffff,#f8faff);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px;box-shadow:var(--shadow-sm);}
.scene-card .tag{display:inline-block;padding:4px 12px;border-radius:999px;background:rgba(245,158,11,.14);color:#b45309;font-size:12px;font-weight:600;margin-bottom:14px;}
.scene-card h3{font-size:17px;font-weight:700;}
.scene-card p{margin-top:10px;font-size:13.8px;line-height:1.8;color:var(--muted);}

/* ===== 三步上手 ===== */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;counter-reset:step;}
.step-card{position:relative;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 24px 26px;box-shadow:var(--shadow-sm);}
.step-num{width:40px;height:40px;border-radius:12px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700;font-size:16px;box-shadow:0 10px 20px rgba(29,78,216,.24);}
.step-card h3{margin-top:16px;font-size:17px;font-weight:700;}
.step-card p{margin-top:10px;font-size:13.8px;line-height:1.8;color:var(--muted);}

/* ===== 对比 ===== */
.compare-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;}
.compare-head,.compare-row{display:grid;grid-template-columns:180px minmax(0,1fr) minmax(0,1fr);gap:0;}
.compare-head{background:var(--brand);color:#fff;font-size:13.5px;font-weight:600;}
.compare-head div,.compare-row div{padding:16px 22px;min-width:0;}
.compare-row{border-top:1px solid var(--line);}
.compare-row div:first-child{font-weight:600;color:var(--ink);background:#f8fafd;font-size:14px;}
.compare-row div{font-size:13.8px;line-height:1.75;color:var(--muted);}
.compare-row div:last-child{color:var(--ink-2);}
.compare-row:nth-child(even) div:last-child{background:#fbfdff;}

/* ===== 安全保障 ===== */
.safe-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.safe-card{display:flex;gap:16px;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);transition:box-shadow .2s ease,transform .2s ease;}
.safe-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);}
.safe-icon{flex:0 0 auto;width:44px;height:44px;border-radius:12px;background:rgba(52,211,153,.14);color:#0f9d6e;display:grid;place-items:center;font-size:18px;}
.safe-card h3{font-size:16px;font-weight:700;}
.safe-card p{margin-top:8px;font-size:13.6px;line-height:1.8;color:var(--muted);}

/* ===== 专题标签 ===== */
.topic-cloud{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.topic-cloud span{display:inline-flex;align-items:center;padding:9px 20px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:14px;color:var(--ink-2);box-shadow:var(--shadow-sm);transition:.2s ease;}
.topic-cloud span:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);}

/* ===== 资讯列表 ===== */
.news-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.news-card{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;overflow:hidden;}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.26);}
.news-link{display:block;padding:24px 24px 22px;height:100%;}
.news-card h3{font-size:16.5px;font-weight:700;line-height:1.55;color:var(--ink);overflow-wrap:break-word;}
.news-card p{margin-top:10px;font-size:13.6px;line-height:1.8;color:var(--muted);overflow-wrap:break-word;}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:12.5px;color:#8b9ab3;}
.news-meta .tag{display:inline-block;padding:3px 11px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-weight:600;}
.news-empty{grid-column:1/-1;padding:44px 20px;text-align:center;font-size:14px;color:var(--muted);background:#fff;border:1px dashed var(--line);border-radius:var(--radius);}

/* ===== 分类入口 ===== */
.channel-wall{display:grid;grid-template-columns:minmax(0,1fr);gap:18px;}
.channel-card{display:flex;align-items:center;gap:20px;min-width:0;background:linear-gradient(120deg,#12275a,#1d4ed8);color:#fff;border-radius:var(--radius-lg);padding:32px 34px;box-shadow:var(--shadow);transition:transform .22s ease,box-shadow .22s ease;}
.channel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.channel-card .cc-icon{flex:0 0 auto;width:56px;height:56px;border-radius:16px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);display:grid;place-items:center;font-size:22px;}
.channel-card h3{font-size:19px;font-weight:700;}
.channel-card p{margin-top:8px;font-size:13.8px;line-height:1.8;color:#cfdcf7;}
.channel-card .cc-arrow{margin-left:auto;flex:0 0 auto;font-size:22px;color:#a9c1ee;}

/* ===== FAQ ===== */
.faq-list{max-width:900px;margin:0 auto;display:grid;gap:14px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item[open]{border-color:rgba(29,78,216,.32);box-shadow:var(--shadow);}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 54px 20px 24px;font-size:15.5px;font-weight:600;color:var(--ink);position:relative;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--brand);transition:transform .2s ease;}
.faq-item[open] summary::after{content:"–";}
.faq-item .faq-body{padding:0 24px 22px;font-size:14px;line-height:1.9;color:var(--muted);}

/* ===== 咨询表单 ===== */
.consult{background:#fff;}
.consult-inner{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:48px;align-items:start;}
.consult-points{margin-top:24px;display:grid;gap:12px;}
.consult-points li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.7;}
.consult-points li::before{content:"✓";flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:12px;display:grid;place-items:center;margin-top:3px;font-weight:700;}
.consult-form{background:#f8faff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px;box-shadow:var(--shadow-sm);min-width:0;}
.form-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px;min-width:0;}
.field label{font-size:13.5px;font-weight:600;color:var(--ink-2);}
.field input,.field select,.field textarea{width:100%;padding:11px 14px;border-radius:10px;border:1px solid var(--line);background:#fff;outline:none;transition:border-color .2s ease,box-shadow .2s ease;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(29,78,216,.12);}
.field textarea{resize:vertical;min-height:96px;}
.consult-form .btn{width:100%;margin-top:6px;}
.form-note{margin-top:14px;font-size:12.5px;line-height:1.75;color:var(--muted);}
.form-tip{margin-top:14px;font-size:13.5px;color:#0f9d6e;display:none;}
.form-tip.show{display:block;}

/* ===== 页脚 ===== */
.site-footer{background:#0a1730;color:#9fb2d0;padding:64px 0 0;margin-top:0;}
.footer-top{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.75fr));gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-text small{color:#8fa5c7;}
.footer-brand p{margin-top:18px;font-size:13.5px;line-height:1.85;color:#8fa5c7;max-width:340px;}
.footer-col h4{font-size:14px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:13.5px;color:#9fb2d0;transition:color .2s ease;}
.footer-col a:hover{color:#7fa9ff;}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:22px 0 28px;font-size:12.5px;color:#7386a6;}
.footer-bottom a{color:#9fb2d0;}
.footer-bottom a:hover{color:#7fa9ff;}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .hero h1{font-size:34px;}
  .hero-inner{gap:38px;}
  .feature-grid,.scene-grid,.steps,.stat-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .download-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
  .consult-inner{grid-template-columns:minmax(0,1fr);gap:32px;}
  .compare-head,.compare-row{grid-template-columns:140px minmax(0,1fr) minmax(0,1fr);}
}
@media (max-width:900px){
  .main-nav{position:fixed;left:0;right:0;top:74px;background:#fff;flex-direction:column;align-items:stretch;gap:2px;padding:14px 20px 20px;border-bottom:1px solid var(--line);box-shadow:0 18px 32px rgba(15,23,42,.12);transform:translateY(-12px);opacity:0;visibility:hidden;transition:opacity .22s ease,transform .22s ease,visibility .22s;}
  .main-nav.open{transform:translateY(0);opacity:1;visibility:visible;}
  .main-nav a{padding:12px 16px;border-radius:10px;font-size:15px;}
  .menu-toggle{display:grid;}
  .search-box{display:none;}
  .header-inner{min-height:66px;gap:14px;}
  .main-nav{top:66px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .hero{padding:56px 0 64px;}
  .hero-inner{grid-template-columns:minmax(0,1fr);gap:36px;}
  .hero h1{font-size:28px;line-height:1.34;}
  .hero-desc{font-size:14.5px;}
  .download-grid{grid-template-columns:minmax(0,1fr);}
  .feature-grid,.scene-grid,.steps,.stat-strip,.news-grid,.safe-grid{grid-template-columns:minmax(0,1fr);}
  .section-title{font-size:23px;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line);padding:6px 0;}
  .compare-row div{padding:8px 20px;}
  .compare-row div:first-child{background:transparent;padding-top:16px;font-size:14.5px;}
  .compare-row div:nth-child(2)::before{content:"以往做法：";color:#94a3b8;font-weight:600;}
  .compare-row div:nth-child(3)::before{content:"客户端操作：";color:var(--brand);font-weight:600;}
  .compare-row:nth-child(even) div:last-child{background:transparent;}
  .channel-card{flex-direction:column;align-items:flex-start;padding:26px 24px;}
  .channel-card .cc-arrow{display:none;}
  .form-row{grid-template-columns:minmax(0,1fr);}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .brand-text{font-size:14.5px;}
  .brand-text small{font-size:10px;}
  .brand-mark{width:36px;height:36px;border-radius:10px;font-size:16px;}
  .hero h1{font-size:24px;}
  .hero-actions .btn{width:100%;}
  .btn{padding:11px 20px;font-size:14.5px;}
  .section-title{font-size:21px;}
  .topbar p{font-size:12.5px;}
  .device-card{padding:18px 16px;}
  .device-list .di{width:46px;height:46px;font-size:12px;}
  .consult-form{padding:22px 18px;}
  .header-actions .btn-sm{padding:8px 15px;font-size:13px;}
}

/* roulang page: article */
:root{
  --brand:#1d4ed8;
  --brand-deep:#16368f;
  --brand-soft:#eef3ff;
  --accent:#f59e0b;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#f6f8fc;
  --card:#ffffff;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(15,23,42,.05);
  --shadow:0 14px 36px rgba(15,23,42,.08);
  --shadow-lg:0 26px 64px rgba(15,23,42,.16);
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease;}
h1,h2,h3,h4,p,figure{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--ink);}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}

/* ===== 顶部公告条 ===== */
.topbar{background:#0d2452;color:#c3d4f2;font-size:13px;}
.topbar-inner{display:flex;align-items:center;gap:12px;min-height:42px;flex-wrap:wrap;}
.topbar-badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:999px;background:rgba(245,158,11,.16);color:#fbbf24;font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;}
.topbar p{flex:1 1 auto;min-width:0;margin:0;color:#b9cbea;}
.topbar-link{color:#ffffff;font-weight:600;white-space:nowrap;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:1px;}
.topbar-link:hover{color:#fbbf24;border-color:#fbbf24;}

/* ===== 导航 ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(15,23,42,.04);}
.header-inner{display:flex;align-items:center;gap:26px;min-height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(145deg,#2563eb,#16368f);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;box-shadow:0 8px 18px rgba(29,78,216,.32);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap;}
.brand-text small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.03em;margin-top:2px;}
.main-nav{display:flex;align-items:center;gap:4px;flex:0 0 auto;}
.main-nav a{padding:8px 15px;border-radius:999px;font-size:14.5px;font-weight:500;color:var(--ink-2);white-space:nowrap;}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand);}
.main-nav a.active{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(29,78,216,.22);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{display:flex;align-items:center;gap:7px;background:#f1f5fb;border:1px solid var(--line);border-radius:999px;padding:6px 8px 6px 14px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;}
.search-box:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(29,78,216,.12);}
.search-box input{border:none;background:transparent;outline:none;width:118px;font-size:13.5px;padding:0;}
.search-box button{border:none;background:var(--brand);color:#fff;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;cursor:pointer;font-size:13px;transition:background .2s ease;}
.search-box button:hover{background:var(--brand-deep);}
.menu-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;padding:0;place-items:center;}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:3px auto;border-radius:2px;transition:.25s;}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 26px rgba(29,78,216,.26);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 16px 32px rgba(29,78,216,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px rgba(29,78,216,.24);}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(29,78,216,.3);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);}
.btn-sm{padding:9px 20px;font-size:13.5px;}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(29,78,216,.35);outline-offset:2px;}

/* ===== 文章页头部 ===== */
.page-head{position:relative;background:#0a1a3c;color:#fff;padding:36px 0 46px;overflow:hidden;}
.page-head::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(820px 420px at 84% 0%,rgba(37,99,235,.48),transparent 62%),radial-gradient(620px 360px at 4% 100%,rgba(14,165,233,.24),transparent 60%);}
.page-head-inner{position:relative;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:#9db6dd;}
.crumbs a{color:#c3d6f5;}
.crumbs a:hover{color:#ffffff;}
.crumbs span.sep{color:#5c78a8;}
.crumbs .current{color:#dfe9fb;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.head-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.head-tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);font-size:12.5px;color:#c7d9ff;}
.head-tag.is-accent{background:rgba(245,158,11,.16);border-color:rgba(245,158,11,.42);color:#fbbf24;font-weight:600;}
.page-head h1{position:relative;margin:18px 0 0;font-size:32px;line-height:1.42;font-weight:800;letter-spacing:-.3px;color:#ffffff;max-width:920px;overflow-wrap:break-word;}
.article-meta{position:relative;display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;margin-top:18px;font-size:13.5px;color:#b7cbea;}
.article-meta i{display:inline-block;width:6px;height:6px;border-radius:50%;background:#34d399;margin-right:8px;vertical-align:middle;}

/* ===== 文章主体布局 ===== */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 322px;gap:28px;align-items:start;padding:34px 0 10px;}
.article-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:34px 38px 40px;min-width:0;}
.article-card-head{display:flex;align-items:center;gap:10px;padding-bottom:18px;margin-bottom:24px;border-bottom:1px dashed var(--line);font-size:13.5px;color:var(--muted);}
.article-card-head strong{color:var(--ink);font-weight:700;font-size:14px;}
.article-content{font-size:15.5px;line-height:1.95;color:var(--ink-2);min-width:0;overflow-wrap:break-word;}
.article-content h2{position:relative;margin:34px 0 14px;padding-left:14px;font-size:22px;line-height:1.5;font-weight:800;color:var(--ink);}
.article-content h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:linear-gradient(180deg,#2563eb,#16368f);}
.article-content h3{margin:26px 0 12px;font-size:18px;font-weight:700;color:var(--ink);}
.article-content h4{margin:20px 0 10px;font-size:16px;font-weight:700;color:var(--ink);}
.article-content p{margin:0 0 16px;}
.article-content ul,.article-content ol{margin:0 0 18px;padding-left:22px;}
.article-content ul{list-style:disc;}
.article-content ol{list-style:decimal;}
.article-content li{margin:7px 0;}
.article-content a{color:var(--brand);border-bottom:1px solid rgba(29,78,216,.28);}
.article-content a:hover{color:var(--brand-deep);border-color:var(--brand-deep);}
.article-content strong{color:var(--ink);font-weight:700;}
.article-content blockquote{margin:20px 0;padding:16px 20px;background:var(--brand-soft);border-left:4px solid var(--brand);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--ink-2);}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;}
.article-content th,.article-content td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;}
.article-content th{background:#f3f6fc;font-weight:700;color:var(--ink);}
.article-content img{border-radius:var(--radius-sm);margin:18px 0;}
.article-content code{padding:2px 6px;border-radius:6px;background:#eef3ff;color:var(--brand-deep);font-size:13.5px;}
.empty-state{padding:26px 4px 10px;text-align:left;}
.empty-state h2{margin:0 0 10px;font-size:21px;font-weight:800;color:var(--ink);}
.empty-state p{margin:0 0 20px;color:var(--muted);}

/* ===== 侧栏 ===== */
.side-col{display:flex;flex-direction:column;gap:20px;min-width:0;position:sticky;top:96px;}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:22px 22px 24px;}
.side-card h2{margin:0 0 6px;font-size:16px;font-weight:800;color:var(--ink);}
.side-card p{margin:0 0 16px;font-size:13.5px;line-height:1.8;color:var(--muted);}
.side-dl{display:flex;flex-direction:column;gap:10px;}
.side-dl a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 15px;border-radius:12px;border:1px solid var(--line);background:#f8faff;font-size:14px;font-weight:600;color:var(--ink);transition:all .18s ease;}
.side-dl a:hover{border-color:var(--brand);background:#fff;color:var(--brand);transform:translateY(-1px);box-shadow:0 10px 22px rgba(29,78,216,.12);}
.side-dl a span.file{font-size:12px;font-weight:500;color:var(--muted);}
.side-points li{position:relative;padding-left:20px;margin:9px 0;font-size:13.5px;line-height:1.8;color:var(--ink-2);}
.side-points li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--brand-soft);border:2px solid var(--brand);}

/* ===== 通用版块 ===== */
.section{padding:54px 0;}
.section.alt{background:#ffffff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin:0 0 30px;}
.section-kicker{display:inline-flex;align-items:center;gap:8px;padding:5px 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:700;letter-spacing:.02em;}
.section-head h2{margin:14px 0 0;font-size:27px;line-height:1.42;font-weight:800;color:var(--ink);letter-spacing:-.3px;}
.section-head p{margin:12px 0 0;font-size:14.5px;line-height:1.9;color:var(--muted);}

/* ===== 下载区 ===== */
.download-wrap{background:linear-gradient(135deg,#0a1a3c,#14316b);border-radius:var(--radius-lg);padding:40px 42px;color:#fff;position:relative;overflow:hidden;box-shadow:var(--shadow);}
.download-wrap::after{content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;background:radial-gradient(circle,rgba(59,130,246,.42),transparent 68%);}
.download-head{position:relative;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:26px;}
.download-head h2{font-size:25px;font-weight:800;color:#fff;line-height:1.4;}
.download-head p{margin:10px 0 0;font-size:14px;color:#b9cbea;max-width:640px;line-height:1.85;}
.dl-grid{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;}
.dl-card{min-width:0;background:rgba(255,255,255,.07);border:1px solid rgba(140,175,255,.26);border-radius:var(--radius);padding:20px 20px 22px;display:flex;flex-direction:column;gap:12px;transition:transform .2s ease,background .2s ease,border-color .2s ease;}
.dl-card:hover{transform:translateY(-3px);background:rgba(255,255,255,.11);border-color:rgba(140,175,255,.54);}
.dl-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:rgba(37,99,235,.34);border:1px solid rgba(140,175,255,.4);font-size:13px;font-weight:700;color:#dce8ff;letter-spacing:.04em;}
.dl-card h3{margin:0;font-size:16.5px;font-weight:700;color:#fff;}
.dl-card p{margin:0;font-size:13px;line-height:1.8;color:#a9c1e8;}
.dl-card .btn{margin-top:auto;width:100%;}
.dl-file{margin-top:14px;font-size:12.5px;color:#93aed8;}
.dl-file code{background:rgba(255,255,255,.1);border-radius:6px;padding:2px 7px;color:#d9e6fb;}

/* ===== 版本对照表 ===== */
.compare-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden;}
.compare-scroll{overflow-x:auto;}
.compare-table{width:100%;border-collapse:collapse;font-size:14px;min-width:620px;}
.compare-table thead th{background:#f3f6fc;color:var(--ink);font-weight:700;text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;}
.compare-table tbody td{padding:15px 18px;border-bottom:1px solid var(--line);color:var(--ink-2);vertical-align:top;}
.compare-table tbody tr:last-child td{border-bottom:none;}
.compare-table tbody tr:hover{background:#fafcff;}
.file-pill{display:inline-block;padding:3px 10px;border-radius:8px;background:var(--brand-soft);color:var(--brand-deep);font-size:13px;font-weight:700;}
.compare-table a{color:var(--brand);font-weight:600;}
.compare-table a:hover{color:var(--brand-deep);text-decoration:underline;}

/* ===== 安装要点卡片 ===== */
.point-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.point-card{min-width:0;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;}
.point-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.26);}
.point-num{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:11px;background:var(--brand-soft);color:var(--brand);font-size:14px;font-weight:800;}
.point-card h3{margin:14px 0 8px;font-size:16.5px;font-weight:700;color:var(--ink);}
.point-card p{margin:0;font-size:13.8px;line-height:1.85;color:var(--muted);}

/* ===== FAQ ===== */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item[open]{border-color:rgba(29,78,216,.32);box-shadow:var(--shadow);}
.faq-item summary{list-style:none;cursor:pointer;padding:17px 22px;font-size:15.5px;font-weight:600;color:var(--ink);display:flex;align-items:center;justify-content:space-between;gap:14px;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:16px;font-weight:700;transition:transform .2s ease;}
.faq-item[open] summary::after{content:"−";transform:rotate(180deg);}
.faq-body{padding:0 22px 20px;font-size:14.2px;line-height:1.9;color:var(--ink-2);}

/* ===== 收口区 ===== */
.closing{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 34px;box-shadow:var(--shadow-sm);}
.closing h2{margin:0 0 8px;font-size:21px;font-weight:800;color:var(--ink);}
.closing p{margin:0;font-size:14px;line-height:1.85;color:var(--muted);max-width:720px;}
.closing-actions{display:flex;flex-wrap:wrap;gap:12px;}
.notice{margin-top:22px;padding:16px 20px;border-radius:var(--radius);background:#fff8ec;border:1px solid #fbe2b7;font-size:13.5px;line-height:1.85;color:#8a5a08;}
.notice strong{color:#7a4d05;}

/* ===== 页脚 ===== */
.site-footer{background:#0a1730;color:#a9bcd8;margin-top:44px;}
.footer-top{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));gap:34px;padding:48px 24px 34px;}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-text small{color:#8ba4c9;}
.footer-brand p{margin:0;font-size:13.5px;line-height:1.9;color:#93a9c9;max-width:420px;}
.footer-col h4{margin:0 0 14px;font-size:14px;font-weight:700;color:#ffffff;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:9px;}
.footer-col a{font-size:13.5px;color:#9fb4d2;}
.footer-col a:hover{color:#ffffff;}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;align-items:center;padding:18px 24px 26px;border-top:1px solid rgba(255,255,255,.08);}
.footer-bottom p{margin:0;font-size:12.5px;color:#7d93b4;}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .header-inner{gap:16px;}
  .search-box input{width:92px;}
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .side-col{position:static;top:auto;flex-direction:row;flex-wrap:wrap;}
  .side-card{flex:1 1 280px;}
  .dl-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .point-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-head h1{font-size:28px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .topbar p{font-size:12.5px;}
  .header-inner{min-height:64px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px;gap:12px;}
  .search-box{display:none;}
  .menu-toggle{display:grid;}
  .main-nav{display:none;flex:1 1 100%;flex-direction:column;align-items:stretch;gap:6px;order:3;padding:10px 0 4px;border-top:1px solid var(--line);margin-top:6px;}
  .main-nav.is-open{display:flex;}
  .main-nav a{padding:11px 14px;border-radius:12px;font-size:14.5px;background:#f6f9ff;}
  .article-card{padding:26px 20px 30px;}
  .page-head{padding:28px 0 36px;}
  .page-head h1{font-size:23px;line-height:1.5;}
  .section{padding:40px 0;}
  .section-head h2{font-size:22px;}
  .download-wrap{padding:28px 22px;}
  .dl-grid{grid-template-columns:minmax(0,1fr);}
  .point-grid{grid-template-columns:minmax(0,1fr);}
  .closing{grid-template-columns:minmax(0,1fr);padding:24px 22px;}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px;padding:36px 20px 26px;}
  .footer-bottom{padding:16px 20px 24px;flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  body{font-size:14.5px;}
  .brand-text{font-size:15px;white-space:normal;}
  .header-actions .btn{padding:9px 16px;font-size:13px;}
  .page-head h1{font-size:20px;}
  .article-content{font-size:15px;}
  .article-content h2{font-size:19px;}
  .download-head h2{font-size:21px;}
  .head-tag{font-size:12px;}
}

/* roulang page: category1 */
:root{
  --brand:#1d4ed8;
  --brand-deep:#16368f;
  --brand-soft:#eef3ff;
  --accent:#f59e0b;
  --ink:#0f172a;
  --ink-2:#334155;
  --muted:#64748b;
  --line:#e2e8f0;
  --bg:#f6f8fc;
  --card:#ffffff;
  --radius-lg:22px;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(15,23,42,.05);
  --shadow:0 14px 36px rgba(15,23,42,.08);
  --shadow-lg:0 26px 64px rgba(15,23,42,.16);
  --max:1180px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;padding:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.75;color:var(--ink);background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease;}
button{font-family:inherit;}
input,select,textarea{font-family:inherit;font-size:14px;color:var(--ink);}
ul,ol{margin:0;padding:0;list-style:none;}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px;}
/* ===== 顶部公告条 ===== */
.topbar{background:#0d2452;color:#c3d4f2;font-size:13px;}
.topbar-inner{display:flex;align-items:center;gap:12px;min-height:42px;flex-wrap:wrap;}
.topbar-badge{display:inline-flex;align-items:center;padding:2px 10px;border-radius:999px;background:rgba(245,158,11,.16);color:#fbbf24;font-size:12px;font-weight:600;letter-spacing:.02em;white-space:nowrap;}
.topbar p{flex:1 1 auto;min-width:0;margin:0;color:#b9cbea;}
.topbar-link{color:#ffffff;font-weight:600;white-space:nowrap;border-bottom:1px solid rgba(255,255,255,.4);padding-bottom:1px;}
.topbar-link:hover{color:#fbbf24;border-color:#fbbf24;}
/* ===== 导航 ===== */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(15,23,42,.04);}
.header-inner{display:flex;align-items:center;gap:26px;min-height:74px;}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(145deg,#2563eb,#16368f);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;box-shadow:0 8px 18px rgba(29,78,216,.32);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;font-size:16px;font-weight:700;color:var(--ink);white-space:nowrap;}
.brand-text small{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.03em;margin-top:2px;}
.main-nav{display:flex;align-items:center;gap:4px;flex:0 0 auto;}
.main-nav a{padding:8px 15px;border-radius:999px;font-size:14.5px;font-weight:500;color:var(--ink-2);white-space:nowrap;}
.main-nav a:hover{background:var(--brand-soft);color:var(--brand);}
.main-nav a.active{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(29,78,216,.22);}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.search-box{display:flex;align-items:center;gap:7px;background:#f1f5fb;border:1px solid var(--line);border-radius:999px;padding:6px 8px 6px 14px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;}
.search-box:focus-within{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(29,78,216,.12);}
.search-box input{border:none;background:transparent;outline:none;width:118px;font-size:13.5px;padding:0;}
.search-box button{border:none;background:var(--brand);color:#fff;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;cursor:pointer;font-size:13px;transition:background .2s ease;}
.search-box button:hover{background:var(--brand-deep);}
.menu-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:#fff;cursor:pointer;padding:0;place-items:center;}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin:3px auto;border-radius:2px;transition:.25s;}
/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;white-space:nowrap;transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 26px rgba(29,78,216,.26);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 16px 32px rgba(29,78,216,.32);}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px rgba(29,78,216,.24);}
.btn-ghost{background:#fff;color:var(--brand);border-color:rgba(29,78,216,.3);}
.btn-ghost:hover{background:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);}
.btn-sm{padding:9px 20px;font-size:13.5px;}
.btn-block{width:100%;}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(29,78,216,.4);outline-offset:2px;}
/* ===== 通用 section ===== */
.section{padding:76px 0;}
.section-alt{background:#fff;}
.section-head{max-width:760px;margin:0 0 38px;}
.section-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);background:var(--brand-soft);padding:5px 13px;border-radius:999px;}
.section-head h2{margin:16px 0 0;font-size:29px;line-height:1.38;font-weight:800;letter-spacing:-.3px;color:var(--ink);}
.section-head p{margin:12px 0 0;font-size:14.5px;line-height:1.85;color:var(--muted);}
/* ===== 分类 Hero ===== */
.hero-cat{position:relative;overflow:hidden;background:linear-gradient(180deg,#e9f0ff 0%,#f6f8fc 100%);padding:64px 0 96px;}
.hero-cat::before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(720px 380px at 88% 4%,rgba(37,99,235,.14),transparent 62%),radial-gradient(520px 320px at 2% 90%,rgba(245,158,11,.1),transparent 64%);}
.hero-inner{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:52px;align-items:center;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 15px;border-radius:999px;background:#fff;border:1px solid rgba(29,78,216,.18);font-size:13px;font-weight:600;color:var(--brand);box-shadow:var(--shadow-sm);}
.hero-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:#22c55e;}
.hero h1{margin:20px 0 0;font-size:38px;line-height:1.3;font-weight:800;letter-spacing:-.5px;color:var(--ink);}
.hero h1 em{font-style:normal;color:var(--brand);}
.hero-desc{margin:18px 0 0;font-size:15.5px;line-height:1.9;color:var(--ink-2);max-width:600px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;}
.hero-points li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-2);}
.hero-points li::before{content:"";width:15px;height:15px;border-radius:50%;background:rgba(34,197,94,.16);border:1px solid rgba(34,197,94,.55);background-image:linear-gradient(45deg,transparent 45%,#16a34a 45%,#16a34a 55%,transparent 55%);flex:0 0 auto;}
.hero-panel{min-width:0;}
.demo-window{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;}
.demo-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;background:#f5f8ff;border-bottom:1px solid var(--line);}
.demo-bar span{width:9px;height:9px;border-radius:50%;background:#cbd5e1;}
.demo-bar span:first-child{background:#fca5a5;}
.demo-bar span:nth-child(2){background:#fcd34d;}
.demo-bar span:nth-child(3){background:#86efac;}
.demo-bar em{margin-left:auto;font-style:normal;font-size:12px;color:var(--muted);letter-spacing:.02em;}
.demo-body{padding:16px;}
.demo-tabs{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap;}
.demo-tabs b{font-size:12.5px;font-weight:600;padding:5px 12px;border-radius:999px;background:#f1f5fb;color:var(--muted);}
.demo-tabs b.on{background:var(--brand);color:#fff;}
.demo-row{display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:var(--radius-sm);background:#f8fafd;margin-bottom:9px;border:1px solid transparent;transition:border-color .2s ease,background .2s ease;}
.demo-row:hover{border-color:rgba(29,78,216,.24);background:#fff;}
.demo-row i{width:32px;height:32px;border-radius:9px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-style:normal;font-size:12px;font-weight:700;flex:0 0 auto;}
.demo-row div{min-width:0;flex:1 1 auto;}
.demo-row strong{display:block;font-size:13.5px;font-weight:600;color:var(--ink);}
.demo-row small{display:block;font-size:12px;color:var(--muted);}
.demo-row u{text-decoration:none;font-size:12px;color:var(--brand);font-weight:600;flex:0 0 auto;}
.demo-foot{border-top:1px solid var(--line);padding:12px 16px;display:flex;align-items:center;gap:10px;background:#fbfcff;}
.demo-foot p{margin:0;font-size:12px;color:var(--muted);}
.demo-foot .pill{font-size:11.5px;font-weight:600;color:#16a34a;background:rgba(34,197,94,.12);padding:3px 10px;border-radius:999px;flex:0 0 auto;}
/* ===== 指标看板 ===== */
.metrics-section{margin-top:-52px;position:relative;z-index:5;padding-bottom:12px;}
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.metric-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;box-shadow:var(--shadow);transition:transform .2s ease,box-shadow .2s ease;}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.metric-card strong{display:block;font-size:30px;line-height:1.1;font-weight:800;color:var(--brand);letter-spacing:-.5px;}
.metric-card span{display:block;margin-top:6px;font-size:14px;font-weight:600;color:var(--ink);}
.metric-card p{margin:8px 0 0;font-size:12.5px;line-height:1.75;color:var(--muted);}
/* ===== 上手顺序 ===== */
.steps-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step;}
.step-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px 22px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;min-width:0;}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.24);}
.step-card::before{counter-increment:step;content:"0" counter(step);display:block;font-size:13px;font-weight:800;color:var(--brand);letter-spacing:.08em;margin-bottom:10px;}
.step-card h3{margin:0 0 8px;font-size:16px;font-weight:700;color:var(--ink);}
.step-card p{margin:0;font-size:13.5px;line-height:1.85;color:var(--muted);}
/* ===== 功能矩阵 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;min-width:0;}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.22);}
.feature-icon{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:15px;font-weight:800;color:var(--brand);background:var(--brand-soft);margin-bottom:16px;}
.feature-card h3{margin:0 0 9px;font-size:16.5px;font-weight:700;color:var(--ink);}
.feature-card p{margin:0;font-size:13.5px;line-height:1.9;color:var(--muted);}
.tag-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px;}
.tag{font-size:12px;color:var(--brand);background:var(--brand-soft);border-radius:999px;padding:3px 11px;font-weight:600;}
/* ===== 对比 ===== */
.compare-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 26px;box-shadow:var(--shadow-sm);min-width:0;}
.compare-card.highlight{border-color:rgba(29,78,216,.28);box-shadow:var(--shadow);}
.compare-card h3{margin:0;font-size:18px;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.compare-card h3 span{font-size:12px;font-weight:600;color:#fff;background:var(--brand);border-radius:999px;padding:3px 11px;}
.compare-list{margin-top:18px;display:flex;flex-direction:column;gap:12px;}
.compare-list li{display:flex;gap:10px;font-size:13.5px;line-height:1.8;color:var(--ink-2);min-width:0;}
.compare-list li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand);margin-top:9px;flex:0 0 auto;}
/* ===== 文件核对表 ===== */
.file-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);}
.file-table th,.file-table td{padding:15px 18px;text-align:left;font-size:13.5px;border-bottom:1px solid var(--line);vertical-align:top;}
.file-table th{background:#f2f6ff;font-weight:700;color:var(--ink);font-size:13px;letter-spacing:.02em;white-space:nowrap;}
.file-table tr:last-child td{border-bottom:none;}
.file-table code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;color:var(--brand-deep);background:var(--brand-soft);padding:2px 8px;border-radius:6px;}
.file-table td a{color:var(--brand);font-weight:600;}
.file-table td a:hover{text-decoration:underline;}
.table-scroll{overflow-x:auto;}
/* ===== 资讯列表 ===== */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.news-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;min-width:0;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(29,78,216,.22);}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);margin-bottom:10px;flex-wrap:wrap;}
.news-meta span{background:var(--brand-soft);color:var(--brand);border-radius:999px;padding:2px 10px;font-weight:600;}
.news-card h3{margin:0 0 10px;font-size:16px;line-height:1.55;font-weight:700;color:var(--ink);}
.news-card h3 a:hover{color:var(--brand);}
.news-card p{margin:0 0 16px;font-size:13.5px;line-height:1.85;color:var(--muted);flex:1 1 auto;}
.news-link{font-size:13.5px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;}
.news-link::after{content:"›";font-size:16px;line-height:1;}
.news-link:hover{color:var(--brand-deep);}
.news-empty{padding:26px;border-radius:var(--radius);background:#fff;border:1px dashed var(--line);color:var(--muted);font-size:14px;text-align:center;}
.news-more{display:flex;justify-content:center;margin-top:32px;}
/* ===== 保障 ===== */
.guard-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.guard-card{background:#fff;border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);min-width:0;}
.guard-card h3{margin:0 0 8px;font-size:16px;font-weight:700;color:var(--ink);}
.guard-card p{margin:0;font-size:13.5px;line-height:1.9;color:var(--muted);}
/* ===== FAQ ===== */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;}
.faq-item[open]{border-color:rgba(29,78,216,.26);box-shadow:var(--shadow);}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 48px 18px 22px;position:relative;font-size:15px;font-weight:600;color:var(--ink);}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:20px;font-weight:400;color:var(--brand);line-height:1;}
.faq-item[open] summary::after{content:"−";}
.faq-item summary:hover{color:var(--brand);}
.faq-item .faq-body{padding:0 22px 20px;font-size:14px;line-height:1.9;color:var(--ink-2);}
.faq-item .faq-body p{margin:0 0 10px;}
.faq-item .faq-body p:last-child{margin-bottom:0;}
/* ===== 下载 / CTA ===== */
.download-band{background:linear-gradient(135deg,#16368f,#1d4ed8 58%,#2563eb);color:#fff;border-radius:var(--radius-lg);padding:48px 44px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;}
.download-band::after{content:"";position:absolute;right:-90px;top:-90px;width:300px;height:300px;border-radius:50%;background:rgba(255,255,255,.08);pointer-events:none;}
.download-inner{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.95fr);gap:40px;align-items:center;}
.download-inner h2{margin:0;font-size:27px;line-height:1.4;font-weight:800;letter-spacing:-.3px;}
.download-inner p{margin:14px 0 0;font-size:14px;line-height:1.9;color:#cfdcf7;max-width:520px;}
.download-btns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
.dl-btn{display:flex;flex-direction:column;align-items:center;gap:4px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);border-radius:var(--radius);padding:16px 10px;color:#fff;text-align:center;transition:background .2s ease,transform .2s ease,border-color .2s ease;}
.dl-btn:hover{background:rgba(255,255,255,.22);transform:translateY(-3px);border-color:#fff;}
.dl-btn strong{font-size:15px;font-weight:700;}
.dl-btn small{font-size:11.5px;color:#cddcf8;word-break:break-word;}
.dl-note{margin:18px 0 0;font-size:12.5px;color:#c2d3f3;line-height:1.8;}
/* ===== 咨询/反馈 ===== */
.consult-wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:32px;align-items:center;}
.consult-list{display:flex;flex-direction:column;gap:14px;margin-top:22px;}
.consult-list li{display:flex;gap:12px;font-size:14px;line-height:1.85;color:var(--ink-2);min-width:0;}
.consult-list li b{flex:0 0 auto;width:24px;height:24px;border-radius:8px;background:var(--brand-soft);color:var(--brand);font-size:12px;font-weight:700;display:grid;place-items:center;margin-top:3px;}
.consult-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px;box-shadow:var(--shadow);}
.consult-card h3{margin:0 0 10px;font-size:18px;font-weight:800;color:var(--ink);}
.consult-card p{margin:0 0 20px;font-size:13.5px;line-height:1.9;color:var(--muted);}
/* ===== 页脚 ===== */
.site-footer{background:#0a1a3c;color:#a8bfe4;padding:64px 0 0;}
.footer-top{display:grid;grid-template-columns:minmax(0,1.6fr) repeat(3,minmax(0,1fr));gap:40px;padding-bottom:44px;}
.footer-brand .brand{margin-bottom:14px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-text small{color:#8fa9d6;}
.footer-brand p{margin:0;font-size:13.5px;line-height:1.9;color:#93aacf;max-width:360px;}
.footer-col h4{margin:0 0 14px;font-size:14px;font-weight:600;color:#fff;letter-spacing:.02em;}
.footer-col ul{display:flex;flex-direction:column;gap:9px;}
.footer-col a{font-size:13.5px;color:#9db3d6;}
.footer-col a:hover{color:#fbbf24;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0 26px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;}
.footer-bottom p{margin:0;font-size:12.5px;color:#7f96bd;}
/* ===== 响应式 ===== */
@media (max-width:1024px){
  .header-inner{gap:16px;flex-wrap:wrap;padding:10px 0;}
  .main-nav{order:3;width:100%;display:none;flex-direction:column;align-items:stretch;gap:6px;padding:6px 0 12px;}
  .main-nav.open{display:flex;}
  .main-nav a{padding:10px 14px;border-radius:12px;}
  .menu-toggle{display:grid;}
  .search-box{margin-left:auto;}
  .hero-inner{grid-template-columns:minmax(0,1fr);gap:38px;}
  .hero h1{font-size:32px;}
  .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .steps-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .guard-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .download-inner{grid-template-columns:minmax(0,1fr);gap:28px;}
  .consult-wrap{grid-template-columns:minmax(0,1fr);}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .hero-cat{padding:44px 0 76px;}
  .hero h1{font-size:27px;line-height:1.36;}
  .hero-desc{font-size:14.5px;}
  .section-head h2{font-size:23px;}
  .compare-grid{grid-template-columns:minmax(0,1fr);}
  .download-band{padding:34px 22px;}
  .download-inner h2{font-size:22px;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:520px){
  .search-box{display:none;}
  .hero h1{font-size:24px;}
  .metric-grid,.steps-grid,.feature-grid,.news-grid,.guard-grid{grid-template-columns:minmax(0,1fr);}
  .download-btns{grid-template-columns:minmax(0,1fr);}
  .footer-top{grid-template-columns:minmax(0,1fr);}
  .brand-text{font-size:15px;}
  .btn{width:100%;}
  .hero-actions .btn,.news-more .btn{width:100%;}
  .file-table th,.file-table td{padding:12px 12px;font-size:12.5px;}
  .metrics-section{margin-top:-36px;}
}