/* roulang page: index */
:root{
  --c-primary:#2f5fd0;
  --c-primary-d:#24499f;
  --c-primary-soft:#eef3fd;
  --c-accent:#e8863b;
  --c-ok:#1f9d6b;
  --c-warn:#d97706;
  --c-ink:#0f172a;
  --c-text:#334155;
  --c-muted:#64748b;
  --c-faint:#94a3b8;
  --c-line:#e6ebf2;
  --c-bg:#f7f9fc;
  --c-white:#ffffff;
  --radius:14px;
  --radius-lg:18px;
  --radius-sm:10px;
  --shadow:0 6px 24px rgba(31,63,120,.07);
  --shadow-h:0 12px 32px rgba(31,63,120,.12);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-d);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4,h5{color:var(--c-ink);font-weight:700;line-height:1.32;letter-spacing:-.01em;margin:0;}
h1{font-size:clamp(28px,4vw,42px);}
h2{font-size:clamp(22px,3vw,30px);}
h3{font-size:19px;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid rgba(47,95,208,.55);outline-offset:3px;border-radius:6px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:78px 0;}
.section-alt{background:var(--c-white);}
.section-line{border-top:1px solid var(--c-line);}
.sec-head{max-width:780px;margin-bottom:36px;}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.sec-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--c-primary);background:var(--c-primary-soft);border-radius:999px;padding:4px 12px;margin-bottom:14px;}
.sec-title{margin-bottom:12px;}
.sec-sub{color:var(--c-muted);font-size:15.5px;}

/* 顶部信息条 */
.topbar{background:#f2f5fb;border-bottom:1px solid var(--c-line);font-size:13px;color:var(--c-muted);}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 20px;min-height:38px;display:flex;align-items:center;gap:18px;}
.topbar-domain{font-weight:700;color:var(--c-primary-d);letter-spacing:.02em;white-space:nowrap;}
.topbar-note{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.topbar-note span{color:var(--c-primary);font-weight:600;}
.topbar-actions{display:flex;align-items:center;gap:12px;white-space:nowrap;}
.topbar-link{color:var(--c-muted);}
.topbar-link:hover{color:var(--c-primary);text-decoration:none;}
.topbar-btn{display:inline-block;border:1px solid #cfdaee;border-radius:999px;padding:3px 12px;color:var(--c-primary-d);background:#fff;font-size:12.5px;cursor:pointer;transition:.2s;}
.topbar-btn:hover{border-color:var(--c-primary);background:var(--c-primary-soft);color:var(--c-primary-d);}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease;}
.site-header.scrolled{box-shadow:0 6px 20px rgba(31,63,120,.08);}
.nav-inner{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:22px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand:hover{text-decoration:none;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--c-primary),#4b7ae8);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;box-shadow:0 6px 16px rgba(47,95,208,.28);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:16.5px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em;}
.brand-desc{font-size:11.5px;color:var(--c-faint);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{display:inline-block;padding:8px 14px;border-radius:9px;font-size:15px;color:var(--c-text);font-weight:500;transition:.2s;}
.nav-link:hover{background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;}
.nav-link.active{background:var(--c-primary-soft);color:var(--c-primary-d);font-weight:700;}
.nav-cta{display:inline-flex;align-items:center;gap:7px;padding:9px 20px;border-radius:10px;background:var(--c-primary);color:#fff;font-weight:600;font-size:14.5px;box-shadow:0 6px 16px rgba(47,95,208,.25);transition:.22s;}
.nav-cta:hover{background:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,95,208,.3);}
.nav-toggle{border:1px solid var(--c-line);background:#fff;border-radius:10px;width:42px;height:40px;display:none;align-items:center;justify-content:center;color:var(--c-ink);}
.mobile-panel{display:none;border-top:1px solid var(--c-line);background:#fff;}
.mobile-panel.open{display:block;}
.mobile-panel .nav-link{display:block;margin:4px 16px;}

/* Hero 卡片堆叠 */
.hero{padding:56px 0 68px;background:linear-gradient(180deg,#f3f7ff 0%,var(--c-bg) 78%);}
.hero-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:24px;align-items:start;}
.hero-main{position:relative;background:#fff;border:1px solid var(--c-line);border-radius:22px;box-shadow:var(--shadow-h);padding:40px 40px 34px;overflow:hidden;}
.hero-main::after{content:"";position:absolute;right:-90px;top:-90px;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle,rgba(47,95,208,.14),rgba(47,95,208,0) 68%);}
.hero-main> *{position:relative;z-index:2;}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:var(--c-primary-soft);color:var(--c-primary-d);border-radius:999px;padding:5px 14px;font-size:13px;font-weight:700;margin-bottom:18px;}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--c-accent);display:inline-block;}
.hero h1{margin-bottom:16px;}
.hero-lead{font-size:16px;color:var(--c-text);line-height:1.85;}
.hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 22px;}
.btn-main{display:inline-flex;align-items:center;gap:8px;background:var(--c-primary);color:#fff;border:1px solid var(--c-primary);border-radius:10px;padding:12px 24px;font-weight:600;font-size:15px;cursor:pointer;transition:.22s;box-shadow:0 8px 20px rgba(47,95,208,.22);}
.btn-main:hover{background:var(--c-primary-d);border-color:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-2px);}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--c-primary-d);border:1.5px solid #c6d5f2;border-radius:10px;padding:11px 22px;font-weight:600;font-size:15px;cursor:pointer;transition:.22s;}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;transform:translateY(-2px);}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;padding-top:20px;border-top:1px dashed var(--c-line);}
.trust-item{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--c-muted);background:#f8fafd;border:1px solid var(--c-line);border-radius:999px;padding:5px 13px;}
.trust-item i{color:var(--c-ok);font-style:normal;font-weight:700;}
.hero-side{display:flex;flex-direction:column;gap:20px;}
.hero-mini{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px;transition:.25s ease;}
.hero-mini:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.hero-mini.mini-a{margin-top:0;}
.hero-mini.mini-b{margin-top:14px;}
.hero-mini h3{font-size:16px;margin-bottom:10px;}
.mini-list li{display:flex;gap:9px;font-size:14px;color:var(--c-muted);padding:6px 0;border-bottom:1px dashed #eef1f6;}
.mini-list li:last-child{border-bottom:none;}
.mini-list b{color:var(--c-ink);font-weight:600;}
.mini-thumb{border-radius:12px;overflow:hidden;margin-bottom:14px;border:1px solid var(--c-line);}
.mini-thumb img{width:100%;height:120px;object-fit:cover;}

/* 通用卡片 */
.card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);transition:box-shadow .25s ease,transform .25s ease;padding:26px;}
.card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.card h3{margin-bottom:10px;font-size:18px;}
.card p{color:var(--c-muted);font-size:14.5px;}
.icon-box{width:46px;height:46px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary-d);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;margin-bottom:16px;}
.tag{display:inline-block;background:var(--c-primary-soft);color:var(--c-primary-d);border-radius:999px;padding:3px 11px;font-size:12px;font-weight:600;margin:0 6px 6px 0;}
.tag-orange{background:#fdf1e6;color:#b96620;}
.more-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-primary);margin-top:14px;}
.more-link:hover{text-decoration:none;gap:11px;color:var(--c-primary-d);}

/* 入口分流 */
.channel-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.channel-card{display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.25s ease;color:var(--c-text);}
.channel-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);text-decoration:none;color:var(--c-text);border-color:#cddcf6;}
.channel-card .ch-top{display:flex;align-items:center;gap:10px;}
.channel-card .dot{width:34px;height:34px;border-radius:10px;background:var(--c-primary-soft);color:var(--c-primary-d);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;}
.channel-card strong{font-size:15.5px;color:var(--c-ink);}
.channel-card span.ch-note{font-size:13px;color:var(--c-faint);}
.channel-card.primary{background:linear-gradient(160deg,#eef3fd,#ffffff 70%);border-color:#c9d9f5;}

/* 非对称功能分组 */
.feature-group{display:grid;grid-template-columns:1.35fr 1fr 1fr;gap:20px;}
.feature-wide{grid-row:span 2;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(165deg,#ffffff,#f4f8ff);border:1px solid var(--c-line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow);}
.feature-wide h3{font-size:21px;margin-bottom:12px;}
.feature-wide ul{margin-top:18px;}
.feature-wide li{font-size:14.5px;color:var(--c-muted);padding:7px 0 7px 24px;position:relative;}
.feature-wide li::before{content:"";position:absolute;left:0;top:15px;width:12px;height:12px;border-radius:4px;background:var(--c-primary-soft);border:2px solid var(--c-primary);}

/* 适用人群 / 对照 */
.fit-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.fit-card{border-radius:var(--radius-lg);padding:28px;border:1px solid var(--c-line);background:#fff;box-shadow:var(--shadow);}
.fit-card h3{font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.fit-card h3 em{font-style:normal;width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:13px;color:#fff;}
.fit-yes h3 em{background:var(--c-ok);}
.fit-no h3 em{background:#b7c2d4;}
.fit-card li{font-size:14.5px;color:var(--c-muted);padding:9px 0;border-bottom:1px dashed #eef1f6;display:flex;gap:10px;}
.fit-card li:last-child{border-bottom:none;}
.fit-card li b{color:var(--c-ink);font-weight:600;}

/* 场景 */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.scene-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.25s ease;display:flex;flex-direction:column;}
.scene-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.scene-bar{height:5px;background:linear-gradient(90deg,var(--c-primary),#7ba2ee);}
.scene-card:nth-child(2) .scene-bar{background:linear-gradient(90deg,var(--c-accent),#f3b57f);}
.scene-card:nth-child(3) .scene-bar{background:linear-gradient(90deg,#1f9d6b,#6fc9a4);}
.scene-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.scene-body ul{margin-top:auto;}
.scene-body li{font-size:14px;color:var(--c-muted);padding:5px 0 5px 22px;position:relative;}
.scene-body li::before{content:"✓";position:absolute;left:0;color:var(--c-ok);font-weight:700;}

/* 演示区 */
.demo-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:30px;align-items:start;}
.browser{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);box-shadow:var(--shadow-h);overflow:hidden;}
.browser-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--c-line);background:#f8fafd;}
.dots{display:flex;gap:6px;}
.dots i{width:10px;height:10px;border-radius:50%;display:block;}
.dots i:nth-child(1){background:#f0a3a3;}
.dots i:nth-child(2){background:#f2cd8a;}
.dots i:nth-child(3){background:#9fd3b6;}
.browser-url{flex:1;background:#fff;border:1px solid var(--c-line);border-radius:999px;font-size:12.5px;color:var(--c-faint);padding:4px 14px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.browser-body img{width:100%;height:340px;object-fit:cover;}
.demo-points li{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--c-line);}
.demo-points li:last-child{border-bottom:none;}
.demo-points em{font-style:normal;flex-shrink:0;width:28px;height:28px;border-radius:9px;background:var(--c-primary-soft);color:var(--c-primary-d);font-weight:700;font-size:13px;display:flex;align-items:center;justify-content:center;}
.demo-points b{display:block;color:var(--c-ink);font-size:15px;margin-bottom:2px;}
.demo-points span{font-size:13.5px;color:var(--c-muted);}
.thumbs{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:22px;}
.thumbs div{border:1px solid var(--c-line);border-radius:12px;overflow:hidden;background:#fff;}
.thumbs img{width:100%;height:78px;object-fit:cover;}

/* 方案 */
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch;}
.plan{position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:28px;display:flex;flex-direction:column;transition:.25s ease;}
.plan:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.plan.featured{border-color:#bcd0f4;box-shadow:0 14px 36px rgba(31,63,120,.14);}
.plan.featured::before{content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--c-primary);border-radius:var(--radius-lg) var(--radius-lg) 0 0;}
.plan-badge{position:absolute;right:20px;top:-13px;background:var(--c-accent);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;box-shadow:0 6px 14px rgba(232,134,59,.28);}
.plan h3{font-size:17px;margin-bottom:6px;}
.plan .plan-note{font-size:13px;color:var(--c-faint);margin-bottom:16px;}
.plan ul{flex:1;margin-bottom:20px;}
.plan li{font-size:14px;color:var(--c-muted);padding:7px 0 7px 24px;position:relative;}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--c-ok);font-weight:700;}
.plan li.off{color:var(--c-faint);}
.plan li.off::before{content:"×";color:#c3cddd;}

/* 案例 */
.case-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:22px;}
.case-main{background:linear-gradient(160deg,#ffffff,#f3f7ff);border:1px solid var(--c-line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:30px;display:flex;flex-direction:column;}
.case-main .case-img{border-radius:12px;overflow:hidden;margin-bottom:18px;border:1px solid var(--c-line);}
.case-main .case-img img{width:100%;height:180px;object-fit:cover;}
.case-data{display:flex;gap:26px;margin:18px 0;flex-wrap:wrap;}
.case-data div b{display:block;font-size:20px;color:var(--c-primary-d);}
.case-data div span{font-size:12.5px;color:var(--c-faint);}
.case-side{display:flex;flex-direction:column;gap:20px;}
.case-small{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;transition:.25s ease;}
.case-small:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.case-small h3{font-size:16px;margin-bottom:8px;}

/* 前后对比 */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.compare-col{border-radius:var(--radius-lg);padding:26px;border:1px solid var(--c-line);background:#fff;box-shadow:var(--shadow);}
.compare-col.before{background:#fbfcfe;}
.compare-col.after{background:linear-gradient(165deg,#eef3fd,#ffffff 65%);border-color:#c9d9f5;}
.compare-col h3{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.compare-col h3 i{width:8px;height:8px;border-radius:50%;display:inline-block;}
.compare-col.before h3 i{background:#b7c2d4;}
.compare-col.after h3 i{background:var(--c-primary);}
.compare-col li{font-size:14.5px;color:var(--c-muted);padding:8px 0;border-bottom:1px dashed #eef1f6;}
.compare-col li:last-child{border-bottom:none;}

/* 专题 */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.topic-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:.25s ease;display:flex;flex-direction:column;}
.topic-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.topic-card img{width:100%;height:150px;object-fit:cover;}
.topic-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.topic-body h3{font-size:16.5px;}
.topic-body p{font-size:14px;color:var(--c-muted);flex:1;}
.topic-meta{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--c-faint);margin-top:8px;}

/* 步骤 */
.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.step{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);position:relative;}
.step em{font-style:normal;position:absolute;right:18px;top:14px;font-size:26px;font-weight:700;color:#e8eefb;}
.step h3{font-size:16px;margin:14px 0 8px;}
.step p{font-size:14px;color:var(--c-muted);}

/* 标签云 */
.tagcloud{display:flex;flex-wrap:wrap;gap:12px;}
.tagcloud a{display:inline-block;background:#fff;border:1px solid var(--c-line);border-radius:999px;padding:8px 18px;font-size:14px;color:var(--c-text);box-shadow:0 2px 8px rgba(31,63,120,.05);transition:.2s;}
.tagcloud a:hover{border-color:var(--c-primary);color:var(--c-primary-d);text-decoration:none;transform:translateY(-2px);}

/* 下载 */
.dl-wrap{background:linear-gradient(165deg,#eef3fd,#f7f9fc 70%);border-radius:22px;padding:44px;border:1px solid #dbe6f8;}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:28px;}
.dl-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.25s ease;}
.dl-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.dl-card .icon-box{margin-bottom:14px;}
.dl-card h3{font-size:17px;margin-bottom:6px;}
.dl-card p{font-size:13.5px;color:var(--c-muted);flex:1;margin-bottom:18px;}
.dl-btn{display:block;text-align:center;background:var(--c-primary);color:#fff;border-radius:10px;padding:11px 18px;font-weight:600;font-size:14.5px;transition:.22s;box-shadow:0 8px 18px rgba(47,95,208,.2);}
.dl-btn:hover{background:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-2px);}
.dl-card:nth-child(2) .dl-btn{background:var(--c-accent);box-shadow:0 8px 18px rgba(232,134,59,.24);}
.dl-card:nth-child(2) .dl-btn:hover{background:#d3762f;}

/* 资讯 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.news-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;display:flex;flex-direction:column;gap:10px;transition:.25s ease;height:100%;}
.news-card:hover{box-shadow:var(--shadow-h);transform:translateY(-3px);}
.news-card h3{font-size:16.5px;line-height:1.5;}
.news-card h3 a{color:var(--c-ink);}
.news-card h3 a:hover{color:var(--c-primary-d);text-decoration:none;}
.news-card p{font-size:14px;color:var(--c-muted);flex:1;}
.news-foot{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--c-faint);padding-top:12px;border-top:1px solid var(--c-line);}
.empty-state{background:#fff;border:1px dashed #d6e0ef;border-radius:var(--radius-lg);padding:56px 24px;text-align:center;}
.empty-state .ei{width:56px;height:56px;border-radius:16px;background:var(--c-primary-soft);color:var(--c-primary-d);display:flex;align-items:center;justify-content:center;font-size:22px;margin:0 auto 16px;}
.empty-state p{color:var(--c-muted);font-size:14.5px;margin-bottom:18px;}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:.8fr 1.6fr;gap:36px;align-items:start;}
.faq-side p{font-size:14.5px;color:var(--c-muted);margin-top:12px;}
.accordion-item{border:1px solid var(--c-line);border-radius:12px !important;overflow:hidden;margin-bottom:12px;background:#fff;box-shadow:0 2px 10px rgba(31,63,120,.05);}
.accordion-button{font-size:16px;font-weight:600;color:var(--c-ink);background:#fff;padding:18px 20px;box-shadow:none !important;}
.accordion-button:not(.collapsed){color:var(--c-primary-d);background:var(--c-primary-soft);}
.accordion-button::after{background-image:none;content:"+";font-size:20px;font-weight:700;color:var(--c-primary);width:26px;height:26px;line-height:24px;text-align:center;border-radius:50%;background:var(--c-primary-soft);transform:none;transition:transform .25s ease;}
.accordion-button:not(.collapsed)::after{content:"−";transform:none;background:#fff;}
.accordion-body{font-size:14.5px;color:var(--c-muted);line-height:1.8;padding:4px 20px 20px;}

/* 收口 CTA */
.cta-band{background:linear-gradient(140deg,var(--c-primary),#3f74db);border-radius:22px;padding:48px 40px;color:#fff;text-align:center;box-shadow:0 18px 40px rgba(47,95,208,.22);}
.cta-band h2{color:#fff;}
.cta-band p{color:#dbe6fb;max-width:660px;margin:14px auto 26px;font-size:15px;}
.cta-form{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;max-width:560px;margin:0 auto;}
.cta-form input{flex:1;min-width:220px;height:46px;border-radius:10px;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.14);color:#fff;padding:0 16px;font-size:14.5px;}
.cta-form input::placeholder{color:#cfe0fb;}
.cta-form input:focus{outline:none;border-color:#fff;background:rgba(255,255,255,.22);}
.cta-form .btn-light-solid{background:#fff;color:var(--c-primary-d);border:none;border-radius:10px;padding:0 26px;height:46px;font-weight:700;font-size:15px;transition:.22s;}
.cta-form .btn-light-solid:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(0,0,0,.16);}
.cta-tip{font-size:12.5px;color:#c9dbfa;margin-top:16px;}
.form-tip{font-size:13px;color:#e9f0ff;margin-top:12px;min-height:20px;}

/* 页脚前品牌条 */
.brand-strip{background:#fff;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);padding:30px 0;}
.brand-strip-inner{display:flex;flex-wrap:wrap;align-items:center;gap:20px;justify-content:space-between;}
.brand-strip h3{font-size:18px;}
.brand-strip p{font-size:14px;color:var(--c-muted);margin-top:4px;}
.strip-links{display:flex;gap:22px;font-size:14px;font-weight:600;}

/* 页脚 */
.site-footer{background:#eef2f9;padding:56px 0 0;color:var(--c-muted);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:36px;}
.footer-grid h4{font-size:15px;margin-bottom:14px;color:var(--c-ink);}
.footer-grid li{padding:5px 0;font-size:14px;}
.footer-grid a{color:var(--c-muted);}
.footer-grid a:hover{color:var(--c-primary);}
.footer-about p{font-size:13.8px;line-height:1.8;margin-top:10px;}
.footer-bottom{border-top:1px solid #dde5f0;padding:18px 0;font-size:13px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;}

@media (max-width:1199px){
  .channel-grid{grid-template-columns:repeat(2,1fr);}
  .topic-grid{grid-template-columns:repeat(2,1fr);}
  .step-grid{grid-template-columns:repeat(2,1fr);}
  .news-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991px){
  .nav-links{display:none;}
  .nav-toggle{display:flex;margin-left:auto;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-mini.mini-b{margin-top:0;}
  .feature-group{grid-template-columns:1fr 1fr;}
  .feature-wide{grid-column:1 / -1;grid-row:auto;}
  .scene-grid,.plan-grid,.dl-grid,.compare,.fit-grid,.case-grid,.demo-grid,.faq-wrap{grid-template-columns:1fr;}
  .browser-body img{height:250px;}
  .section{padding:60px 0;}
  .dl-wrap{padding:30px;}
}
@media (max-width:767px){
  .topbar-note{display:none;}
  .wrap{padding:0 16px;}
  .topbar-inner{padding:0 16px;gap:12px;}
  .hero{padding:34px 0 46px;}
  .hero-main{padding:26px 22px;}
  .hero-btns .btn-main,.hero-btns .btn-ghost{width:100%;justify-content:center;}
  .feature-group{grid-template-columns:1fr;}
  .channel-grid,.topic-grid,.news-grid,.step-grid{grid-template-columns:1fr;}
  .thumbs{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-band{padding:34px 22px;}
  .brand-strip-inner{flex-direction:column;align-items:flex-start;}
  .section{padding:48px 0;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .hero-mini{padding:18px;}
  .card,.plan,.news-card{padding:20px;}
}

/* roulang page: article */
:root{
  --c-primary:#2f5fd0;
  --c-primary-d:#24499f;
  --c-primary-soft:#eef3fd;
  --c-accent:#e8863b;
  --c-ok:#1f9d6b;
  --c-warn:#d97706;
  --c-ink:#0f172a;
  --c-text:#334155;
  --c-muted:#64748b;
  --c-faint:#94a3b8;
  --c-line:#e6ebf2;
  --c-bg:#f7f9fc;
  --c-white:#ffffff;
  --radius:14px;
  --radius-lg:18px;
  --radius-sm:10px;
  --shadow:0 6px 24px rgba(31,63,120,.07);
  --shadow-h:0 12px 32px rgba(31,63,120,.12);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;font-family:var(--font);font-size:16px;line-height:1.75;
  color:var(--c-text);background:var(--c-bg);-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-d);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;}
button{font-family:inherit;}
:focus-visible{outline:2px solid rgba(47,95,208,.55);outline-offset:3px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:76px 0;}
.section-alt{background:var(--c-white);}
.section-line{border-top:1px solid var(--c-line);}
.sec-head{max-width:760px;margin:0 0 34px;}
.sec-head h2{font-size:clamp(22px,3vw,32px);margin-bottom:10px;}
.sec-head p{color:var(--c-muted);font-size:15.5px;margin:0;}
.sec-eyebrow{display:inline-block;color:var(--c-accent);font-weight:700;font-size:13px;letter-spacing:.06em;margin-bottom:10px;}

/* 按钮 */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);padding:12px 24px;font-weight:600;font-size:15px;
  cursor:pointer;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease,color .22s ease;
}
.btn-main{background:var(--c-primary);color:#fff;border:1px solid var(--c-primary);box-shadow:0 8px 20px rgba(47,95,208,.22);}
.btn-main:hover{background:var(--c-primary-d);border-color:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 12px 26px rgba(47,95,208,.28);}
.btn-main:active{transform:translateY(0);}
.btn-ghost{background:#fff;color:var(--c-primary-d);border:1.5px solid #c6d5f2;}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(0);}

/* 顶部信息条 */
.topbar{background:#f2f5fb;border-bottom:1px solid var(--c-line);font-size:13px;color:var(--c-muted);}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 20px;min-height:38px;display:flex;align-items:center;gap:18px;}
.topbar-domain{font-weight:700;color:var(--c-primary-d);letter-spacing:.02em;white-space:nowrap;}
.topbar-note{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.topbar-note span{color:var(--c-primary);font-weight:600;}
.topbar-actions{display:flex;align-items:center;gap:12px;white-space:nowrap;}
.topbar-link{color:var(--c-muted);font-size:13px;}
.topbar-link:hover{color:var(--c-primary);text-decoration:none;}
.topbar-btn{border:1px solid #cfdaee;border-radius:999px;padding:3px 12px;color:var(--c-primary-d);background:#fff;font-size:12.5px;cursor:pointer;transition:.2s;}
.topbar-btn:hover{border-color:var(--c-primary);background:var(--c-primary-soft);}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease;}
.site-header.scrolled{box-shadow:0 6px 20px rgba(31,63,120,.08);}
.nav-inner{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:22px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand:hover{text-decoration:none;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--c-primary),#4b7ae8);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;box-shadow:0 6px 16px rgba(47,95,208,.28);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:16.5px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em;}
.brand-desc{font-size:11.5px;color:var(--c-faint);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{display:inline-block;padding:8px 14px;border-radius:9px;font-size:15px;color:var(--c-text);font-weight:500;transition:.2s;}
.nav-link:hover{background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;}
.nav-link.active{background:var(--c-primary-soft);color:var(--c-primary-d);font-weight:700;}
.nav-cta{display:inline-flex;align-items:center;gap:7px;padding:9px 20px;border-radius:var(--radius-sm);background:var(--c-primary);color:#fff;font-weight:600;font-size:14.5px;box-shadow:0 6px 16px rgba(47,95,208,.25);transition:.22s;}
.nav-cta:hover{background:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,95,208,.3);}
.nav-toggle{border:1px solid var(--c-line);background:#fff;border-radius:10px;width:42px;height:40px;display:none;align-items:center;justify-content:center;color:var(--c-ink);cursor:pointer;}
.mobile-panel{display:none;border-top:1px solid var(--c-line);background:#fff;padding-bottom:12px;}
.mobile-panel.open{display:block;}
.mobile-panel .nav-link{display:block;margin:4px 16px;}

/* 文章头部 */
.article-hero{background:linear-gradient(180deg,#f3f7ff 0%,var(--c-bg) 92%);border-bottom:1px solid var(--c-line);padding:30px 0 34px;}
.breadcrumb-nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-muted);margin-bottom:18px;}
.breadcrumb-nav .sep{color:var(--c-faint);}
.breadcrumb-nav .cur{color:var(--c-text);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-title{font-size:clamp(26px,3.6vw,42px);line-height:1.28;margin-bottom:16px;}
.article-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.meta-item{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid var(--c-line);border-radius:999px;padding:5px 14px;font-size:13px;color:var(--c-muted);}
.meta-item i{font-style:normal;color:var(--c-primary);font-weight:700;font-size:12px;}

/* 正文布局 */
.article-layout{display:grid;grid-template-columns:180px minmax(0,1fr) 300px;gap:44px;align-items:start;}
.article-col{min-width:0;}
.article-body{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:38px 40px;font-size:17.5px;line-height:1.9;color:#2b3a4f;
}
.article-body > *:first-child{margin-top:0;}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  font-size:clamp(20px,2.4vw,25px);margin:1.9em 0 .8em;padding-left:14px;position:relative;color:var(--c-ink);
}
.article-body h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:4px;background:var(--c-primary);}
.article-body h3{font-size:19px;margin:1.6em 0 .6em;color:var(--c-ink);}
.article-body h4{font-size:17px;margin:1.4em 0 .5em;color:var(--c-ink);}
.article-body a{color:var(--c-primary);border-bottom:1px solid rgba(47,95,208,.3);}
.article-body a:hover{color:var(--c-primary-d);text-decoration:none;border-bottom-color:var(--c-primary-d);}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em;}
.article-body li{margin-bottom:.45em;}
.article-body blockquote{
  margin:1.4em 0;padding:18px 22px;background:#f6f8fd;border-left:4px solid var(--c-primary);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--c-text);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius);margin:22px auto;box-shadow:var(--shadow);}
.article-body figure{margin:22px 0;}
.article-body figcaption{text-align:center;font-size:13.5px;color:var(--c-faint);margin-top:10px;}
.article-body code{background:#f1f4fa;border-radius:6px;padding:2px 6px;font-size:.92em;color:var(--c-primary-d);}
.article-body pre{background:#f5f7fb;border:1px solid var(--c-line);border-radius:var(--radius-sm);padding:18px 20px;overflow-x:auto;font-size:14px;line-height:1.7;}
.article-body pre code{background:none;padding:0;}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0;}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:1.4em 0;display:block;overflow-x:auto;}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;text-align:left;}
.article-body th{background:#f4f7fc;color:var(--c-ink);font-weight:700;}

/* 标签与分享 */
.article-tags{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:26px;padding:20px 24px;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);}
.tag-list{display:flex;flex-wrap:wrap;gap:10px;}
.tag{display:inline-block;background:var(--c-primary-soft);color:var(--c-primary-d);border-radius:999px;padding:5px 14px;font-size:12.5px;font-weight:600;}
.share-row{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-muted);}
.share-dot{width:32px;height:32px;border-radius:50%;background:#f2f5fb;border:1px solid var(--c-line);display:inline-flex;align-items:center;justify-content:center;color:var(--c-primary-d);font-size:12.5px;font-weight:700;}

/* 作者说明 */
.author-card{display:flex;gap:16px;align-items:flex-start;margin-top:20px;padding:22px 24px;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);}
.author-avatar{width:48px;height:48px;flex:0 0 48px;border-radius:14px;background:linear-gradient(135deg,var(--c-primary),#4b7ae8);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;}
.author-card h3{font-size:15.5px;margin-bottom:6px;}
.author-card p{margin:0;font-size:13.8px;color:var(--c-muted);line-height:1.8;}

/* 侧栏 */
.article-side{display:flex;flex-direction:column;gap:20px;min-width:0;}
.side-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 22px 20px;}
.side-card h3{font-size:15.5px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent);}
.tip-list{list-style:none;padding:0;margin:0;}
.tip-list li{position:relative;padding-left:22px;font-size:13.8px;color:var(--c-muted);line-height:1.8;margin-bottom:12px;}
.tip-list li:last-child{margin-bottom:0;}
.tip-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--c-ok);font-weight:700;font-size:13px;}
.side-dl .btn-side{display:block;text-align:center;border-radius:var(--radius-sm);padding:10px 14px;font-size:14px;font-weight:600;background:var(--c-primary-soft);color:var(--c-primary-d);border:1px solid #d9e4f8;margin-bottom:10px;transition:.2s;}
.side-dl .btn-side:last-child{margin-bottom:0;}
.side-dl .btn-side:hover{background:var(--c-primary);color:#fff;border-color:var(--c-primary);text-decoration:none;transform:translateY(-1px);}

/* 空态 */
.empty-state{text-align:center;padding:52px 24px;background:#fbfcfe;border:1px dashed #d8e2f1;border-radius:var(--radius);}
.empty-icon{width:52px;height:52px;margin:0 auto 14px;border-radius:16px;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;}
.empty-state p{color:var(--c-muted);margin-bottom:18px;font-size:15px;}

/* 相关推荐 */
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.post-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);border-color:#d8e2f1;text-decoration:none;}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:#eef3fd;}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
.post-card:hover .post-thumb img{transform:scale(1.04);}
.post-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;min-width:0;}
.post-body h3{font-size:16px;line-height:1.5;margin-bottom:10px;color:var(--c-ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{font-size:13.8px;color:var(--c-muted);line-height:1.75;margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--c-faint);border-top:1px dashed var(--c-line);padding-top:12px;}
.post-foot .more{color:var(--c-primary);font-weight:600;transition:transform .2s ease;}
.post-card:hover .post-foot .more{transform:translateX(3px);}

/* 常见问题 */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:box-shadow .2s ease,border-color .2s ease;}
.faq-item[open]{border-color:#cfdbee;box-shadow:var(--shadow-h);}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:700;color:var(--c-ink);display:flex;align-items:center;gap:12px;transition:color .2s ease;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{content:"?";flex:0 0 26px;width:26px;height:26px;border-radius:50%;background:var(--c-primary-soft);color:var(--c-primary);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;}
.faq-item summary::after{content:"+";margin-left:auto;color:var(--c-primary);font-size:20px;font-weight:700;line-height:1;transition:transform .25s ease;}
.faq-item[open] summary::after{transform:rotate(45deg);}
.faq-item summary:hover{color:var(--c-primary-d);}
.faq-answer{padding:0 22px 20px 60px;font-size:14.8px;color:var(--c-muted);line-height:1.85;}

/* 下载 */
.download-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.dl-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:28px 26px;display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease;}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);}
.dl-icon{width:46px;height:46px;border-radius:14px;background:var(--c-primary-soft);color:var(--c-primary-d);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px;margin-bottom:16px;}
.dl-card h3{font-size:18px;margin-bottom:8px;}
.dl-card p{font-size:14px;color:var(--c-muted);line-height:1.8;margin-bottom:20px;}
.dl-card .btn-main{width:100%;}
.dl-file{margin-top:12px;text-align:center;font-size:12.5px;color:var(--c-faint);letter-spacing:.02em;}

/* 转化条 */
.cta-band{background:linear-gradient(135deg,#eef3fd,#f7f9fc);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);padding:64px 0;text-align:center;}
.cta-band h2{font-size:clamp(22px,3vw,30px);margin-bottom:12px;}
.cta-band p{color:var(--c-muted);font-size:15.5px;max-width:640px;margin:0 auto 26px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;}

/* 页脚 */
.site-footer{background:#eef2f9;border-top:1px solid var(--c-line);padding:56px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:36px;}
.site-footer h4{font-size:15px;color:var(--c-ink);margin-bottom:14px;}
.site-footer p{font-size:14px;color:var(--c-muted);line-height:1.8;margin:0;}
.site-footer ul{list-style:none;padding:0;margin:0;}
.site-footer li{margin-bottom:10px;}
.site-footer a{color:var(--c-muted);font-size:14px;}
.site-footer a:hover{color:var(--c-primary);text-decoration:none;}
.footer-bottom{border-top:1px solid #dde4ef;padding:18px 0;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-faint);}

/* 响应式 */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:28px;}
  .article-rail{display:none;}
}
@media (max-width:991px){
  .section{padding:56px 0;}
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .article-body{padding:30px 26px;font-size:16.8px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .download-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .wrap{padding:0 16px;}
  .topbar-inner{padding:0 16px;gap:12px;}
  .topbar-note{display:none;}
  .nav-inner{gap:12px;padding:10px 16px;}
  .nav-links{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;margin-left:auto;}
  .section{padding:46px 0;}
  .article-hero{padding:22px 0 26px;}
  .article-body{padding:24px 20px;font-size:16.5px;line-height:1.85;}
  .article-body h2{font-size:20px;}
  .article-tags{flex-direction:column;align-items:flex-start;}
  .related-grid,.download-grid{grid-template-columns:minmax(0,1fr);}
  .faq-answer{padding-left:22px;}
  .cta-band{padding:46px 0;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:520px){
  .article-title{font-size:24px;}
  .meta-item{font-size:12px;padding:4px 11px;}
  .breadcrumb-nav .cur{white-space:normal;}
}

/* roulang page: category1 */
:root{
  --c-primary:#2f5fd0;
  --c-primary-d:#24499f;
  --c-primary-soft:#eef3fd;
  --c-accent:#e8863b;
  --c-ok:#1f9d6b;
  --c-warn:#d97706;
  --c-ink:#0f172a;
  --c-text:#334155;
  --c-muted:#64748b;
  --c-faint:#94a3b8;
  --c-line:#e6ebf2;
  --c-bg:#f7f9fc;
  --c-white:#ffffff;
  --radius:14px;
  --radius-lg:18px;
  --radius-sm:10px;
  --shadow:0 6px 24px rgba(31,63,120,.07);
  --shadow-h:0 12px 32px rgba(31,63,120,.12);
  --font:"PingFang SC","Microsoft YaHei","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--c-text);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--c-primary);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-primary-d);text-decoration:underline;text-underline-offset:3px;}
h1,h2,h3,h4{color:var(--c-ink);font-weight:700;line-height:1.3;letter-spacing:-.01em;margin:0 0 12px;}
h1{font-size:clamp(26px,3.6vw,38px);}
h2{font-size:clamp(21px,2.6vw,29px);}
h3{font-size:19px;}
p{margin:0 0 14px;}
ul,ol{margin:0;padding:0;}
:focus-visible{outline:2px solid rgba(47,95,208,.55);outline-offset:2px;}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
.section{padding:72px 0;}
.section-alt{background:var(--c-white);}
.section-line{border-top:1px solid var(--c-line);}
.sec-head{margin-bottom:30px;max-width:760px;}
.sec-head p{color:var(--c-muted);font-size:15.5px;margin-bottom:0;}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;color:var(--c-primary-d);background:var(--c-primary-soft);border-radius:999px;padding:4px 12px;margin-bottom:12px;}

/* 顶部信息条 */
.topbar{background:#f2f5fb;border-bottom:1px solid var(--c-line);font-size:13px;color:var(--c-muted);}
.topbar-inner{max-width:1200px;margin:0 auto;padding:0 20px;min-height:38px;display:flex;align-items:center;gap:18px;}
.topbar-domain{font-weight:700;color:var(--c-primary-d);letter-spacing:.02em;white-space:nowrap;}
.topbar-note{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
.topbar-note span{color:var(--c-primary);font-weight:600;}
.topbar-actions{display:flex;align-items:center;gap:12px;white-space:nowrap;}
.topbar-link{color:var(--c-muted);}
.topbar-link:hover{color:var(--c-primary);text-decoration:none;}
.topbar-btn{display:inline-block;border:1px solid #cfdaee;border-radius:999px;padding:3px 12px;color:var(--c-primary-d);background:#fff;font-size:12.5px;transition:.2s;}
.topbar-btn:hover{border-color:var(--c-primary);background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;}

/* 主导航 */
.site-header{position:sticky;top:0;z-index:1030;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease;}
.site-header.scrolled{box-shadow:0 6px 20px rgba(31,63,120,.08);}
.nav-inner{max-width:1200px;margin:0 auto;padding:12px 20px;display:flex;align-items:center;gap:22px;}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;}
.brand:hover{text-decoration:none;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--c-primary),#4b7ae8);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;box-shadow:0 6px 16px rgba(47,95,208,.28);}
.brand-text{display:flex;flex-direction:column;line-height:1.2;}
.brand-name{font-size:16.5px;font-weight:700;color:var(--c-ink);letter-spacing:-.01em;}
.brand-desc{font-size:11.5px;color:var(--c-faint);letter-spacing:.04em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{display:inline-block;padding:8px 14px;border-radius:9px;font-size:15px;color:var(--c-text);font-weight:500;transition:.2s;}
.nav-link:hover{background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;}
.nav-link.active{background:var(--c-primary-soft);color:var(--c-primary-d);font-weight:700;}
.nav-cta{display:inline-flex;align-items:center;gap:7px;padding:9px 20px;border-radius:10px;background:var(--c-primary);color:#fff;font-weight:600;font-size:14.5px;box-shadow:0 6px 16px rgba(47,95,208,.25);transition:.22s;}
.nav-cta:hover{background:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-1px);box-shadow:0 10px 22px rgba(47,95,208,.3);}
.nav-toggle{border:1px solid var(--c-line);background:#fff;border-radius:10px;width:42px;height:40px;display:none;align-items:center;justify-content:center;color:var(--c-ink);font-size:18px;line-height:1;cursor:pointer;}
.nav-toggle:hover{border-color:var(--c-primary);color:var(--c-primary);}
.mobile-panel{display:none;border-top:1px solid var(--c-line);background:#fff;padding-bottom:10px;}
.mobile-panel.open{display:block;}
.mobile-panel .nav-link{display:block;margin:4px 16px;}

/* 按钮 */
.btn-main{display:inline-flex;align-items:center;gap:8px;background:var(--c-primary);color:#fff;border:1px solid var(--c-primary);border-radius:10px;padding:12px 24px;font-weight:600;font-size:15px;cursor:pointer;transition:.22s;box-shadow:0 8px 20px rgba(47,95,208,.22);}
.btn-main:hover{background:var(--c-primary-d);border-color:var(--c-primary-d);color:#fff;text-decoration:none;transform:translateY(-2px);}
.btn-ghost{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--c-primary-d);border:1.5px solid #c6d5f2;border-radius:10px;padding:11px 22px;font-weight:600;font-size:15px;cursor:pointer;transition:.22s;}
.btn-ghost:hover{border-color:var(--c-primary);background:var(--c-primary-soft);color:var(--c-primary-d);text-decoration:none;transform:translateY(-2px);}

/* 分类页头 */
.cat-head{background:linear-gradient(180deg,#f3f7ff 0%,var(--c-bg) 82%);padding:40px 0 34px;border-bottom:1px solid var(--c-line);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-faint);margin-bottom:16px;}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-primary);text-decoration:none;}
.crumb .sep{color:#c3cddd;}
.cat-head-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:30px;align-items:start;}
.cat-head h1{margin-bottom:14px;}
.cat-lead{font-size:15.5px;color:var(--c-text);line-height:1.9;max-width:640px;}
.cat-lead strong{color:var(--c-primary-d);font-weight:600;}
.cat-meta{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px;}
.meta-pill{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--c-muted);background:#fff;border:1px solid var(--c-line);border-radius:999px;padding:5px 13px;}
.meta-pill b{color:var(--c-primary-d);font-weight:700;}
.stat-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius-lg);box-shadow:var(--shadow-h);padding:22px 22px 18px;}
.stat-card h3{font-size:15px;margin-bottom:6px;}
.stat-card .stat-sub{font-size:13px;color:var(--c-faint);margin-bottom:12px;}
.stat-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px dashed var(--c-line);}
.stat-row:last-of-type{border-bottom:0;}
.stat-row span{font-size:13.5px;color:var(--c-muted);}
.stat-row b{font-size:20px;color:var(--c-primary-d);font-weight:700;letter-spacing:-.01em;}
.stat-back{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:600;}
.stat-back:hover{text-decoration:none;gap:10px;}

/* 筛选条 */
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:14px 16px;box-shadow:var(--shadow);margin-bottom:26px;}
.chip{border:1px solid var(--c-line);background:#fbfcfe;color:var(--c-text);border-radius:999px;padding:6px 14px;font-size:13.5px;font-weight:500;cursor:pointer;transition:.2s;}
.chip:hover{border-color:#c6d5f2;background:var(--c-primary-soft);color:var(--c-primary-d);}
.chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600;}
.filter-right{margin-left:auto;display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--c-muted);}
.filter-right select{border:1px solid var(--c-line);border-radius:9px;background:#fff;color:var(--c-text);font-size:13.5px;padding:6px 10px;font-family:inherit;}
.filter-right select:focus{outline:none;border-color:var(--c-primary);box-shadow:0 0 0 3px rgba(47,95,208,.14);}

/* 条目列表 */
.entry-list{display:flex;flex-direction:column;gap:14px;}
.entry{display:grid;grid-template-columns:56px minmax(0,1fr) auto;gap:18px;align-items:start;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;}
.entry:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);border-color:#c9d8f5;}
.entry-icon{width:52px;height:52px;border-radius:14px;background:var(--c-primary-soft);color:var(--c-primary-d);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;letter-spacing:.02em;}
.entry-title{font-size:17px;font-weight:700;color:var(--c-ink);margin:0 0 6px;}
.entry-desc{font-size:14.5px;color:var(--c-muted);line-height:1.8;margin:0 0 10px;}
.tag-row{display:flex;flex-wrap:wrap;gap:7px;}
.tag{display:inline-block;font-size:12px;line-height:1;padding:6px 10px;border-radius:999px;background:var(--c-primary-soft);color:var(--c-primary-d);font-weight:600;}
.tag.tone-warn{background:#fdf1e3;color:#a35a13;}
.entry-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px;min-width:104px;}
.entry-group{font-size:12.5px;color:var(--c-faint);}
.entry-flag{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--c-ok);background:#eaf7f1;border-radius:999px;padding:5px 11px;}

/* 分组速览 */
.group-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;}
.group-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px 20px;transition:transform .25s ease,box-shadow .25s ease;display:flex;flex-direction:column;}
.group-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-h);}
.group-card .grp-bar{width:34px;height:4px;border-radius:99px;background:var(--c-accent);margin-bottom:14px;}
.group-card h3{font-size:16.5px;margin-bottom:8px;}
.group-card p{font-size:13.8px;color:var(--c-muted);line-height:1.75;margin-bottom:14px;}
.group-card ul{list-style:none;font-size:13.5px;color:var(--c-text);margin-top:auto;}
.group-card li{padding-left:16px;position:relative;margin-bottom:6px;}
.group-card li::before{content:"";position:absolute;left:0;top:.62em;width:6px;height:6px;border-radius:50%;background:#b9cdf3;}

/* 使用建议 */
.tips-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center;}
.tips-list{list-style:none;display:flex;flex-direction:column;gap:18px;}
.tips-list li{display:grid;grid-template-columns:38px minmax(0,1fr);gap:14px;align-items:start;}
.tips-num{width:38px;height:38px;border-radius:11px;background:var(--c-primary);color:#fff;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(47,95,208,.22);}
.tips-list h3{font-size:16.5px;margin-bottom:5px;}
.tips-list p{font-size:14.5px;color:var(--c-muted);margin-bottom:0;line-height:1.8;}
.tips-figure{margin:0;}
.tips-figure img{width:100%;height:100%;max-height:420px;object-fit:cover;border-radius:var(--radius-lg);border:1px solid var(--c-line);box-shadow:var(--shadow);}
.tips-figure figcaption{font-size:12.5px;color:var(--c-faint);margin-top:10px;}

/* 核对清单 */
.check-list{display:flex;flex-direction:column;gap:12px;}
.check-row{display:grid;grid-template-columns:44px minmax(0,1fr) 220px;gap:16px;align-items:center;background:#fff;border:1px solid var(--c-line);border-left:3px solid var(--c-accent);border-radius:var(--radius);padding:16px 20px;box-shadow:var(--shadow);transition:box-shadow .25s ease;}
.check-row:hover{box-shadow:var(--shadow-h);}
.check-idx{font-weight:700;color:var(--c-accent);font-size:15px;}
.check-row h3{font-size:16px;margin-bottom:4px;}
.check-row p{font-size:14px;color:var(--c-muted);margin-bottom:0;}
.check-how{font-size:13px;color:var(--c-primary-d);background:var(--c-primary-soft);border-radius:var(--radius-sm);padding:9px 12px;line-height:1.6;}

/* 下载条 */
.dl-band{background:linear-gradient(135deg,#eef3fd 0%,#f9fbff 100%);border:1px solid #dbe6fb;border-radius:var(--radius-lg);padding:30px 28px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;box-shadow:var(--shadow);}
.dl-band h2{font-size:clamp(19px,2.2vw,24px);margin-bottom:8px;}
.dl-band p{font-size:14.5px;color:var(--c-muted);margin-bottom:0;max-width:560px;}
.dl-btns{display:flex;flex-wrap:wrap;gap:12px;}

/* FAQ */
.accordion-item{border:1px solid var(--c-line);border-radius:12px;background:#fff;box-shadow:var(--shadow);margin-bottom:12px;overflow:hidden;}
.accordion-item:last-child{margin-bottom:0;}
.accordion-button{font-family:inherit;font-size:16px;font-weight:700;color:var(--c-ink);background:#fff;padding:17px 20px;box-shadow:none;}
.accordion-button:not(.collapsed){background:var(--c-primary-soft);color:var(--c-primary-d);box-shadow:none;}
.accordion-button:focus{box-shadow:inset 0 0 0 2px rgba(47,95,208,.35);z-index:3;}
.accordion-button::after{content:"+";background-image:none;width:24px;height:24px;border-radius:50%;background-color:#fff;border:1px solid #d7e2f6;color:var(--c-primary);font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:center;line-height:1;transform:none;}
.accordion-button:not(.collapsed)::after{content:"−";transform:none;color:var(--c-primary-d);border-color:#bcd0f2;}
.accordion-body{font-size:14.8px;color:var(--c-muted);line-height:1.85;padding:4px 20px 20px;}
.accordion-body strong{color:var(--c-ink);font-weight:600;}

/* CTA */
.cta-band{background:linear-gradient(135deg,var(--c-primary) 0%,#3b6ede 100%);border-radius:var(--radius-lg);padding:44px 34px;text-align:center;color:#fff;box-shadow:0 14px 36px rgba(47,95,208,.24);}
.cta-band h2{color:#fff;margin-bottom:10px;}
.cta-band p{color:#dfe9ff;font-size:15px;max-width:620px;margin:0 auto 22px;}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;}
.cta-band .btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.55);color:#fff;}
.cta-band .btn-ghost:hover{background:#fff;color:var(--c-primary-d);border-color:#fff;}
.cta-band .btn-main{background:#fff;border-color:#fff;color:var(--c-primary-d);box-shadow:0 10px 24px rgba(10,30,80,.2);}
.cta-band .btn-main:hover{background:#f2f6ff;color:var(--c-primary-d);}

/* 页脚 */
.site-footer{background:#eef2f9;border-top:1px solid var(--c-line);padding:56px 0 20px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;}
.footer-grid h4{font-size:15px;color:var(--c-ink);margin-bottom:14px;font-weight:700;}
.footer-grid ul{list-style:none;}
.footer-grid li{margin-bottom:9px;font-size:14px;}
.footer-grid a{color:var(--c-muted);}
.footer-grid a:hover{color:var(--c-primary);text-decoration:none;}
.footer-about p{font-size:14px;color:var(--c-muted);line-height:1.85;margin-bottom:0;}
.footer-bottom{border-top:1px solid #dde5f0;margin-top:34px;padding-top:16px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:13px;color:var(--c-faint);}

@media (max-width:1199px){
  .group-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  .nav-links{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-cta{display:none;}
  .cat-head-grid{grid-template-columns:minmax(0,1fr);}
  .tips-grid{grid-template-columns:minmax(0,1fr);}
  .tips-figure img{max-height:320px;}
  .check-row{grid-template-columns:36px minmax(0,1fr);}
  .check-how{grid-column:1/-1;}
  .dl-band{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .section{padding:56px 0;}
}
@media (max-width:767px){
  .topbar-note{display:none;}
  .topbar-actions .topbar-link{display:none;}
  .wrap{padding:0 16px;}
  .nav-inner{padding:10px 16px;gap:12px;}
  .cat-head{padding:28px 0 24px;}
  .cat-lead{font-size:15px;}
  .entry{grid-template-columns:46px minmax(0,1fr);padding:16px;}
  .entry-icon{width:44px;height:44px;font-size:14px;border-radius:12px;}
  .entry-side{grid-column:1/-1;flex-direction:row;align-items:center;justify-content:space-between;min-width:0;}
  .filter-right{margin-left:0;width:100%;}
  .group-grid{grid-template-columns:minmax(0,1fr);}
  .dl-band{padding:24px 20px;}
  .dl-btns{width:100%;}
  .dl-btns .btn-main,.dl-btns .btn-ghost{flex:1 1 100%;justify-content:center;}
  .cta-band{padding:32px 20px;}
  .cta-btns .btn-main,.cta-btns .btn-ghost{flex:1 1 100%;justify-content:center;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:24px;}
  .brand-desc{display:none;}
  .meta-pill{font-size:12px;}
  .section{padding:46px 0;}
}