/* roulang page: index */
:root{
  --brand:#2F6FED;
  --brand-dark:#1E4FBF;
  --brand-soft:#EAF1FE;
  --safe:#14B8A6;
  --safe-soft:#E3F8F5;
  --risk:#F9735B;
  --risk-soft:#FDECE8;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --ink:#172033;
  --ink-2:#5B6578;
  --line:#E4EAF2;
  --footer:#101828;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow:0 10px 30px rgba(23,32,51,.07);
  --shadow-hover:0 16px 40px rgba(47,111,237,.12);
  --container:1200px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{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(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md);}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-dark);text-decoration:underline;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul{margin:0;padding:0;list-style:none;}
svg{display:block;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 10px 0;z-index:999;}
.skip-link:focus{left:0;color:#fff;}
:focus-visible{outline:3px solid rgba(47,111,237,.35);outline-offset:2px;border-radius:6px;}

/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;padding:12px 0;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{width:42px;height:42px;flex:0 0 42px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand-sub{font-size:12px;color:var(--ink-2);font-weight:500;letter-spacing:.02em;}
.brand-tools{display:flex;align-items:center;gap:12px;flex:1 1 340px;justify-content:flex-end;}
.search-form{display:flex;align-items:center;gap:8px;max-width:340px;width:100%;}
.search-field{position:relative;flex:1;}
.search-field svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:17px;height:17px;stroke:var(--ink-2);}
.search-input{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 14px 0 38px;font-size:14px;color:var(--ink);background:#FBFCFE;transition:border-color .18s ease,box-shadow .18s ease;
}
.search-input::placeholder{color:#8C97A8;}
.search-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,111,237,.14);background:#fff;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(47,111,237,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;box-shadow:0 12px 26px rgba(30,79,191,.26);}
.btn-outline{background:#fff;color:var(--brand);border-color:#C9DBFC;}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand);}
.btn-ghost{background:transparent;color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.channel-bar{background:#fff;border-top:1px solid var(--line);position:sticky;top:0;z-index:60;box-shadow:0 6px 16px rgba(23,32,51,.04);}
.channel-inner{display:flex;align-items:center;gap:6px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;display:inline-flex;align-items:center;min-height:48px;padding:0 16px;
  font-size:15px;font-weight:500;color:var(--ink-2);white-space:nowrap;border-radius:10px;transition:background .16s ease,color .16s ease;
}
.channel-link:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none;}
.channel-link.is-active{color:var(--brand-dark);font-weight:700;}
.channel-link.is-active::after{content:"";position:absolute;left:16px;right:16px;bottom:0;height:3px;border-radius:3px 3px 0 0;background:var(--brand);}
.channel-link.is-active:hover{background:transparent;}

/* ---------- shared section ---------- */
.section{padding:84px 0;}
.section.on-white{background:#fff;}
.section.on-bg{background:var(--bg);}
.section-head{max-width:760px;margin-bottom:40px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:600;letter-spacing:.02em;margin-bottom:16px;
}
.eyebrow.safe{background:var(--safe-soft);color:#0E8C80;}
.eyebrow.risk{background:var(--risk-soft);color:#C2452F;}
.section-head h2{font-size:clamp(26px,3vw,36px);line-height:1.28;margin-bottom:14px;}
.section-head p{color:var(--ink-2);font-size:16px;margin:0;}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D3E0F7;}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:600;}
.tag.safe{background:var(--safe-soft);color:#0E8C80;}
.tag.risk{background:var(--risk-soft);color:#C2452F;}
.tag.plain{background:#F1F4F9;color:var(--ink-2);}

/* ---------- hero ---------- */
.hero{
  background:
    linear-gradient(180deg,rgba(246,248,252,.96),rgba(246,248,252,.99)),
    url('/assets/images/569710ed16702e65.webp') center/cover no-repeat;
  padding:64px 0 72px;
  border-bottom:1px solid var(--line);
}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:56px;align-items:start;}
.hero-copy h1{font-size:clamp(34px,4.2vw,52px);line-height:1.16;letter-spacing:-.02em;margin-bottom:20px;}
.hero-copy h1 em{font-style:normal;color:var(--brand);}
.hero-lead{font-size:16.5px;color:var(--ink-2);line-height:1.85;margin-bottom:18px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:22px;}
.hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 24px;margin-bottom:26px;}
.hero-points li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);line-height:1.6;}
.hero-points svg{width:18px;height:18px;flex:0 0 18px;margin-top:3px;stroke:var(--safe);}
.dl-mini{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:18px 20px;}
.dl-mini-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;}
.dl-mini-title strong{font-size:14.5px;}
.dl-mini-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;}
.dl-mini-links a{
  display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 6px;border-radius:var(--radius-sm);
  border:1px solid var(--line);background:#FBFCFE;color:var(--ink);font-size:13px;font-weight:600;text-align:center;line-height:1.3;
  transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease;
}
.dl-mini-links a:hover{background:var(--brand-soft);border-color:#C9DBFC;color:var(--brand-dark);text-decoration:none;transform:translateY(-1px);}
.dl-mini-links span{font-size:11px;color:var(--ink-2);font-weight:500;}
.dl-note{font-size:12px;color:#8C97A8;margin:10px 0 0;}
.hero-visual{position:relative;}
.phone-stage{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:26px;padding:14px;
  box-shadow:0 22px 55px rgba(23,32,51,.12);
}
.phone-stage::before{
  content:"";position:absolute;inset:-14px -14px auto auto;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(20,184,166,.22),rgba(20,184,166,0) 70%);
}
.phone-frame{position:relative;border-radius:18px;overflow:hidden;background:#EEF2F9;aspect-ratio:4/5;}
.phone-frame img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.verify-float{
  margin-top:-34px;margin-left:8px;position:relative;z-index:2;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-md);box-shadow:0 14px 34px rgba(23,32,51,.12);padding:14px 16px;max-width:320px;
}
.verify-float p{font-size:12.5px;font-weight:700;color:var(--ink-2);margin:0 0 10px;letter-spacing:.02em;}
.verify-list{display:flex;flex-direction:column;gap:8px;}
.verify-list li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ink);}
.verify-list i{width:8px;height:8px;border-radius:50%;flex:0 0 8px;background:var(--safe);}
.verify-list li.warn i{background:var(--risk);}

/* ---------- 1. 功能分组 ---------- */
.split-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:28px;align-items:start;}
.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;}
.feature-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;}
.feature-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.feature-icon{width:44px;height:44px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:var(--brand-soft);margin-bottom:16px;}
.feature-icon svg{width:22px;height:22px;stroke:var(--brand);}
.feature-icon.safe{background:var(--safe-soft);}
.feature-icon.safe svg{stroke:#0E8C80;}
.feature-icon.risk{background:var(--risk-soft);}
.feature-icon.risk svg{stroke:#C2452F;}
.feature-card h3{font-size:19px;margin-bottom:8px;}
.feature-card p{font-size:14.5px;color:var(--ink-2);margin:0;line-height:1.72;}
.checklist-card{background:#0F1B33;border-radius:var(--radius-lg);padding:26px 24px;color:#fff;box-shadow:0 18px 44px rgba(16,24,40,.25);}
.checklist-card h3{color:#fff;font-size:18px;margin-bottom:6px;}
.checklist-card .cl-sub{font-size:13px;color:#A8B4C8;margin:0 0 18px;}
.checklist-card ol{margin:0;padding:0;list-style:none;counter-reset:cl;}
.checklist-card li{
  counter-increment:cl;position:relative;padding-left:30px;font-size:14px;line-height:1.65;color:#DCE3EF;margin-bottom:13px;
}
.checklist-card li::before{
  content:counter(cl);position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:50%;
  background:rgba(47,111,237,.35);color:#fff;font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.checklist-card .cl-foot{font-size:12.5px;color:#8E9BB1;margin:6px 0 0;padding-top:14px;border-top:1px solid rgba(255,255,255,.1);}

/* ---------- 2. 附近聊天安全功能条 ---------- */
.safety-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;}
.safety-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 20px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;}
.safety-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.safety-item .num{font-size:12px;font-weight:700;color:var(--brand);letter-spacing:.08em;margin-bottom:8px;display:block;}
.safety-item h3{font-size:17px;margin-bottom:8px;}
.safety-item p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.7;}

/* ---------- 3. 五步法 ---------- */
.steps{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;counter-reset:step;}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px 18px 20px;box-shadow:var(--shadow);}
.step::after{content:"";position:absolute;top:36px;right:-12px;width:12px;height:2px;background:#D3E0F7;}
.step:last-child::after{display:none;}
.step-num{
  width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;
}
.step h3{font-size:16px;margin-bottom:6px;}
.step p{font-size:13.5px;color:var(--ink-2);margin:0;line-height:1.65;}

/* ---------- 4. 风险信号对照 ---------- */
.signal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;}
.signal-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px;box-shadow:var(--shadow);}
.signal-col.good{border-top:4px solid var(--safe);}
.signal-col.bad{border-top:4px solid var(--risk);}
.signal-col h3{font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.signal-col ul li{
  display:flex;gap:10px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--ink-2);line-height:1.68;
}
.signal-col ul li:last-child{border-bottom:none;padding-bottom:0;}
.signal-col ul li strong{color:var(--ink);font-weight:600;}
.dot{width:8px;height:8px;flex:0 0 8px;border-radius:50%;margin-top:8px;background:var(--safe);}
.dot.risk{background:var(--risk);}

/* ---------- 5. 使用场景 ---------- */
.scene-rail{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px;}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.scene-thumb{aspect-ratio:16/9;overflow:hidden;background:#E8EEF8;}
.scene-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .35s ease;}
.scene-card:hover .scene-thumb img{transform:scale(1.04);}
.scene-body{padding:20px;}
.scene-body h3{font-size:17px;margin-bottom:8px;}
.scene-body p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.7;}

/* ---------- 6. 截图演示 ---------- */
.shot-wrap{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;}
.shot{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:16px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;}
.shot:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.shot-screen{border-radius:14px;overflow:hidden;background:#EEF2F9;aspect-ratio:9/16;}
.shot-screen img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.shot h3{font-size:16px;margin:16px 0 6px;}
.shot p{font-size:13.5px;color:var(--ink-2);margin:0;line-height:1.68;}

/* ---------- 7. 案例 ---------- */
.case-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.case-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease;}
.case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.case-thumb{aspect-ratio:4/3;overflow:hidden;background:#E8EEF8;}
.case-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.case-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.case-body h3{font-size:17px;line-height:1.5;}
.case-body p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.72;}
.case-body .case-foot{margin-top:auto;font-size:12.5px;color:#8C97A8;padding-top:10px;border-top:1px dashed var(--line);}

/* ---------- 8. 会员方案 ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;align-items:stretch;}
.plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px 24px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease;}
.plan:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);}
.plan.featured{border:2px solid var(--brand);box-shadow:0 16px 40px rgba(47,111,237,.14);}
.plan-badge{position:absolute;top:-13px;left:24px;background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;}
.plan h3{font-size:19px;margin-bottom:6px;}
.plan .plan-sub{font-size:13.5px;color:var(--ink-2);margin:0 0 18px;}
.plan ul{margin:0 0 22px;display:flex;flex-direction:column;gap:10px;}
.plan ul li{display:flex;gap:10px;font-size:14px;color:var(--ink-2);line-height:1.6;}
.plan ul li svg{width:16px;height:16px;flex:0 0 16px;margin-top:4px;stroke:var(--safe);}
.plan .plan-note{font-size:12.5px;color:#8C97A8;margin:auto 0 14px;}
.plan-price{font-size:15px;font-weight:700;color:var(--brand-dark);margin:0 0 16px;}

/* ---------- 9. 评价墙 ---------- */
.wall{columns:3;column-gap:22px;}
.wall-card{break-inside:avoid;margin-bottom:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;}
.wall-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.wall-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:#fff;background:linear-gradient(135deg,#2F6FED,#14B8A6);flex:0 0 40px;}
.avatar.alt{background:linear-gradient(135deg,#14B8A6,#2F6FED);}
.avatar.alt2{background:linear-gradient(135deg,#F9735B,#2F6FED);}
.wall-head .who{font-size:14px;font-weight:600;}
.wall-head .role{font-size:12px;color:#8C97A8;}
.wall-card p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.72;}
.wall-empty{border:2px dashed #D3E0F7;border-radius:var(--radius-lg);padding:34px 24px;text-align:center;background:#FBFCFE;color:var(--ink-2);font-size:14px;}

/* ---------- 10. 口碑讨论 ---------- */
.topic-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px;}
.topic-tags span{padding:7px 16px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13.5px;color:var(--ink-2);}
.qa-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.qa-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow);}
.qa-card h3{font-size:16px;margin-bottom:8px;line-height:1.55;}
.qa-card p{font-size:14px;color:var(--ink-2);margin:0;line-height:1.72;}

/* ---------- 11. CMS 资讯 ---------- */
.news-layout{display:grid;grid-template-columns:minmax(0,2.15fr) minmax(0,1fr);gap:32px;align-items:start;}
.news-list{display:flex;flex-direction:column;gap:20px;}
.news-item{display:grid;grid-template-columns:minmax(0,200px) minmax(0,1fr);gap:22px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:18px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease;}
.news-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);}
.news-thumb{aspect-ratio:16/10;border-radius:var(--radius-sm);overflow:hidden;background:#E8EEF8;}
.news-thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;}
.news-body h3{font-size:17.5px;line-height:1.5;margin-bottom:8px;}
.news-body h3 a{color:var(--ink);}
.news-body h3 a:hover{color:var(--brand-dark);text-decoration:none;}
.news-body p{font-size:14px;color:var(--ink-2);margin:0 0 12px;line-height:1.7;}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:12.5px;color:#8C97A8;}
.empty-state{border:2px dashed #D3E0F7;background:#FBFCFE;border-radius:var(--radius-lg);padding:36px 24px;text-align:center;color:var(--ink-2);font-size:14.5px;}
.news-side{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);position:sticky;top:110px;}
.news-side h3{font-size:16.5px;margin-bottom:14px;}
.side-list{display:flex;flex-direction:column;gap:14px;}
.side-list li a{font-size:14px;color:var(--ink);line-height:1.6;display:block;}
.side-list li a:hover{color:var(--brand-dark);}
.side-list li span{display:block;font-size:12px;color:#8C97A8;margin-top:4px;}

/* ---------- 12. 专题入口 ---------- */
.topic-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,280px);gap:24px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow);}
.topic-row h3{font-size:20px;margin-bottom:10px;}
.topic-row p{font-size:14.5px;color:var(--ink-2);margin:0;line-height:1.75;}
.topic-link{display:inline-flex;align-items:center;gap:10px;min-height:48px;padding:0 24px;border-radius:var(--radius-sm);background:var(--brand);color:#fff;font-weight:600;justify-content:center;transition:background .18s ease,transform .18s ease;}
.topic-link:hover{background:var(--brand-dark);color:#fff;text-decoration:none;transform:translateY(-1px);}

/* ---------- 13. 下载区 ---------- */
.download-band{background:linear-gradient(135deg,#1B3A73 0%,#2F6FED 100%);border-radius:22px;padding:48px 44px;color:#fff;box-shadow:0 24px 60px rgba(30,79,191,.28);}
.download-band h2{color:#fff;font-size:clamp(24px,2.8vw,32px);margin-bottom:12px;}
.download-band > p{color:#D3E0F7;font-size:15px;max-width:640px;margin:0 0 30px;line-height:1.75;}
.dl-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.dl-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.24);border-radius:var(--radius-md);padding:22px;display:flex;flex-direction:column;gap:12px;transition:background .18s ease,transform .18s ease;}
.dl-card:hover{background:rgba(255,255,255,.17);transform:translateY(-2px);}
.dl-card h3{color:#fff;font-size:16.5px;display:flex;align-items:center;gap:10px;}
.dl-card h3 svg{width:20px;height:20px;stroke:#fff;}
.dl-card p{color:#C7D7F5;font-size:13px;margin:0;line-height:1.65;}
.dl-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;border-radius:var(--radius-sm);background:#fff;color:var(--brand-dark);font-weight:700;font-size:14.5px;padding:0 18px;margin-top:auto;transition:background .18s ease,color .18s ease,transform .18s ease;}
.dl-btn:hover{background:#EAF1FE;color:var(--brand-dark);text-decoration:none;transform:translateY(-1px);}
.dl-disclaimer{font-size:12.5px;color:#AFC4E8;margin:20px 0 0;}

/* ---------- 14. FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow);overflow:hidden;transition:border-color .18s ease;}
.faq-item.open{border-color:#C9DBFC;}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 22px;background:none;border:0;text-align:left;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer;min-height:56px;transition:background .16s ease;}
.faq-q:hover{background:#FBFCFE;}
.faq-q .chev{width:20px;height:20px;flex:0 0 20px;stroke:var(--brand);transition:transform .22s ease;}
.faq-item.open .chev{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq-a-inner{padding:0 22px 20px;font-size:14.5px;color:var(--ink-2);line-height:1.8;}

/* ---------- 15. 收口 CTA ---------- */
.cta-band{background:var(--brand-soft);border:1px solid #D3E0F7;border-radius:22px;padding:40px 40px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:center;}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px;}
.cta-band p{font-size:15px;color:var(--ink-2);margin:0;max-width:620px;line-height:1.75;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- footer ---------- */
.site-footer{background:var(--footer);color:#B7C2D4;padding:64px 0 0;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:44px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{color:#fff;font-size:16.5px;}
.footer-brand .brand-sub{color:#8E9BB1;}
.footer-about{font-size:13.5px;line-height:1.8;color:#98A5B9;margin:0;}
.site-footer h4{color:#fff;font-size:14.5px;margin-bottom:16px;font-weight:700;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{color:#B7C2D4;font-size:14px;transition:color .16s ease;}
.footer-links a:hover{color:#fff;text-decoration:none;}
.footer-note{font-size:12.5px;color:#7E8CA3;line-height:1.8;margin:16px 0 0;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:#7E8CA3;}

/* ---------- responsive ---------- */
@media screen and (max-width:1024px){
  .section{padding:64px 0;}
  .hero{padding:48px 0 60px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{order:2;max-width:520px;}
  .split-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr));}
  .step::after{display:none;}
  .safety-strip{grid-template-columns:repeat(2,minmax(0,1fr));}
  .scene-rail{grid-template-columns:repeat(2,minmax(0,1fr));}
  .case-list{grid-template-columns:repeat(2,minmax(0,1fr));}
  .plan-grid{grid-template-columns:1fr;max-width:560px;}
  .wall{columns:2;}
  .news-layout{grid-template-columns:1fr;}
  .news-side{position:static;}
  .topic-row{grid-template-columns:1fr;}
  .dl-grid{grid-template-columns:1fr;}
  .cta-band{grid-template-columns:1fr;padding:32px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
  .shot-wrap{gap:20px;}
}
@media screen and (max-width:768px){
  .container{padding:0 18px;}
  .brand-row{gap:14px;}
  .brand-tools{flex:1 1 100%;justify-content:flex-start;}
  .search-form{max-width:none;}
  .hero-points{grid-template-columns:1fr;}
  .feature-grid{grid-template-columns:1fr;}
  .signal-grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .step{padding:20px 18px;}
  .shot-wrap{grid-template-columns:1fr;max-width:320px;margin:0 auto;}
  .case-list{grid-template-columns:1fr;}
  .wall{columns:1;}
  .qa-grid{grid-template-columns:1fr;}
  .news-item{grid-template-columns:1fr;}
  .download-band{padding:34px 22px;}
  .dl-mini-links{grid-template-columns:1fr;}
  .section{padding:52px 0;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
}
@media screen and (max-width:520px){
  .hero-copy h1{font-size:31px;}
  .btn{width:100%;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .safety-strip{grid-template-columns:1fr;}
  .scene-rail{grid-template-columns:1fr;}
  .brand-name{font-size:15.5px;}
  .channel-link{padding:0 12px;font-size:14px;}
  .channel-link.is-active::after{left:12px;right:12px;}
}

/* roulang page: article */
:root{
  --brand:#2F6FED;
  --brand-dark:#1E4FBF;
  --brand-soft:#EAF1FE;
  --safe:#14B8A6;
  --safe-soft:#E3F8F5;
  --risk:#F9735B;
  --risk-soft:#FDECE8;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --ink:#172033;
  --ink-2:#5B6578;
  --line:#E4EAF2;
  --footer:#101828;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow:0 10px 30px rgba(23,32,51,.07);
  --shadow-hover:0 16px 40px rgba(47,111,237,.12);
  --container:1200px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-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(--ink);background:var(--bg);overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md);}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-dark);text-decoration:underline;}
button{font-family:inherit;}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
[id]{scroll-margin-top:118px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
/* ---------- header ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;padding:12px 0;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{width:42px;height:42px;flex:0 0 42px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand-sub{font-size:12px;color:var(--ink-2);font-weight:500;letter-spacing:.02em;}
.brand-tools{display:flex;align-items:center;gap:12px;flex:1 1 340px;justify-content:flex-end;}
.search-form{display:flex;align-items:center;gap:8px;max-width:340px;width:100%;}
.search-field{position:relative;flex:1;}
.search-field svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:17px;height:17px;stroke:var(--ink-2);fill:none;stroke-width:2;stroke-linecap:round;}
.search-input{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 14px 0 38px;font-size:14px;color:var(--ink);background:#FBFCFE;
  transition:border-color .18s ease,box-shadow .18s ease;
}
.search-input::placeholder{color:#8C97A8;}
.search-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,111,237,.14);background:#fff;}
.channel-bar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:60;box-shadow:0 2px 10px rgba(23,32,51,.04);}
.channel-inner{display:flex;gap:6px;overflow-x:auto;padding:6px 0;scrollbar-width:none;-ms-overflow-style:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-link{
  display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:10px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);white-space:nowrap;
  transition:background .16s ease,color .16s ease;
}
.channel-link:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none;}
.channel-link:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:2px;}
.channel-link.is-active{background:var(--brand-soft);color:var(--brand-dark);}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:2px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(47,111,237,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;box-shadow:0 12px 26px rgba(30,79,191,.26);}
.btn-outline{background:#fff;color:var(--brand);border-color:#C9DBFC;}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand);}
.btn-ghost{background:transparent;color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
/* ---------- tags ---------- */
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:600;}
.tag.safe{background:var(--safe-soft);color:#0E8C80;}
.tag.risk{background:var(--risk-soft);color:#C2452F;}
.tag.plain{background:#F1F4F9;color:var(--ink-2);}
/* ---------- breadcrumb ---------- */
.crumb-bar{background:#fff;border-bottom:1px solid var(--line);}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-2);padding:16px 0;}
.crumb a{color:var(--ink-2);}
.crumb a:hover{color:var(--brand);text-decoration:none;}
.crumb .sep{color:#C3CCDA;}
.crumb .current{color:var(--ink);font-weight:600;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
/* ---------- article head ---------- */
.article-head{background:#fff;padding:34px 0 44px;border-bottom:1px solid var(--line);}
.article-head h1{font-size:clamp(26px,3.4vw,40px);line-height:1.28;letter-spacing:-.01em;margin:14px 0 18px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;font-size:13.5px;color:var(--ink-2);}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C3CCDA;display:inline-block;}
.head-cover{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);}
.head-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;aspect-ratio:16/11;}
/* ---------- mobile toc ---------- */
.mobile-toc{display:none;}
/* ---------- article layout ---------- */
.article-main{padding:48px 0 76px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start;}
.article-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:44px;}
.article-body{font-size:16.5px;line-height:1.85;color:#26314A;overflow-wrap:break-word;}
.article-body h2{font-size:clamp(22px,2.4vw,28px);line-height:1.4;margin:48px 0 16px;padding-left:14px;border-left:4px solid var(--brand);color:var(--ink);}
.article-body h2:first-child{margin-top:0;}
.article-body h3{font-size:20px;line-height:1.45;margin:32px 0 12px;color:var(--ink);}
.article-body p{margin:0 0 18px;}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 18px;list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:10px;}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;background:var(--brand-soft);color:#22365C;
  border-left:4px solid var(--brand);border-radius:0 12px 12px 0;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:16px;margin:22px 0;box-shadow:var(--shadow);}
.article-body a{color:var(--brand);text-decoration:underline;}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top;}
.article-body th{background:#F4F7FD;font-weight:700;}
.article-body strong{color:var(--ink);}
.empty-state{text-align:center;padding:56px 20px;}
.empty-state h2{font-size:24px;margin:0 0 12px;}
.empty-state p{color:var(--ink-2);margin-bottom:22px;}
/* ---------- sidebar ---------- */
.article-side{position:sticky;top:88px;display:flex;flex-direction:column;gap:20px;}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:22px;}
.side-card h3{font-size:15px;margin:0 0 14px;letter-spacing:.01em;color:var(--ink);}
.side-nav{display:flex;flex-direction:column;gap:4px;}
.side-nav a{
  display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:10px;
  font-size:14px;color:var(--ink-2);transition:background .16s ease,color .16s ease;
}
.side-nav a::before{content:"";width:6px;height:6px;border-radius:50%;background:#C3CCDA;flex:0 0 6px;transition:background .16s ease;}
.side-nav a:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none;}
.side-nav a:hover::before{background:var(--brand);}
.side-dl{display:flex;flex-direction:column;gap:8px;}
.side-dl .btn{justify-content:flex-start;padding:0 16px;min-height:42px;font-size:14px;}
.side-note{font-size:12.5px;color:var(--ink-2);margin:12px 0 0;line-height:1.7;}
.side-tip{background:var(--safe-soft);border-color:#C7EFEA;}
.side-tip h3{color:#0E8C80;}
.side-tip p{font-size:13.5px;color:#2A4A47;line-height:1.75;margin:0;}
/* ---------- checklist section ---------- */
.block{margin-top:32px;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);padding:36px;}
.block-head{margin-bottom:24px;}
.block-head h2{font-size:clamp(22px,2.3vw,28px);line-height:1.35;margin:10px 0 10px;}
.block-head p{color:var(--ink-2);margin:0;font-size:15px;}
.check-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;}
.check-item{display:flex;gap:12px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--radius-md);background:#FBFCFE;transition:border-color .18s ease,box-shadow .18s ease;}
.check-item:hover{border-color:#CFE0FA;box-shadow:0 8px 22px rgba(47,111,237,.08);}
.check-item svg{width:20px;height:20px;flex:0 0 20px;margin-top:3px;stroke:var(--safe);fill:none;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;}
.check-item span{font-size:14.5px;line-height:1.7;color:#2C374D;}
.dl-zone{margin-top:26px;border-top:1px dashed var(--line);padding-top:26px;}
.dl-zone h3{font-size:18px;margin:0 0 6px;}
.dl-zone p{font-size:14px;color:var(--ink-2);margin:0 0 18px;}
.dl-buttons{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
.dl-buttons .btn{min-height:52px;font-size:15px;}
.dl-hint{font-size:12.5px;color:#8C97A8;margin:14px 0 0;}
/* ---------- signals ---------- */
.signal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.signal-col{border-radius:var(--radius-md);border:1px solid var(--line);padding:22px;background:#FBFCFE;}
.signal-col.good{border-color:#C7EFEA;background:#F4FCFB;}
.signal-col.bad{border-color:#FBDDD6;background:#FFF8F6;}
.signal-col h3{display:flex;align-items:center;gap:10px;font-size:16px;margin:0 0 16px;}
.signal-col h3 .dot-mark{width:9px;height:9px;border-radius:50%;display:inline-block;}
.signal-col.good h3 .dot-mark{background:var(--safe);}
.signal-col.bad h3 .dot-mark{background:var(--risk);}
.signal-list{display:flex;flex-direction:column;gap:12px;}
.signal-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.7;color:#2C374D;}
.signal-list li::before{content:"";width:6px;height:6px;border-radius:50%;margin-top:10px;flex:0 0 6px;background:#BFD0E8;}
.signal-col.good .signal-list li::before{background:var(--safe);}
.signal-col.bad .signal-list li::before{background:var(--risk);}
/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-md);background:#FBFCFE;overflow:hidden;transition:border-color .18s ease,box-shadow .18s ease;}
.faq-item[open]{border-color:#C9DBFC;box-shadow:0 10px 26px rgba(47,111,237,.09);background:#fff;}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 20px;font-size:15.5px;font-weight:600;color:var(--ink);cursor:pointer;
  list-style:none;min-height:56px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:-3px;}
.faq-item summary .chev{width:20px;height:20px;flex:0 0 20px;stroke:var(--brand);fill:none;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;transition:transform .22s ease;}
.faq-item[open] summary .chev{transform:rotate(180deg);}
.faq-answer{padding:0 20px 18px;font-size:15px;line-height:1.8;color:var(--ink-2);}
/* ---------- more reading ---------- */
.more-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;}
.more-card{
  display:block;padding:20px;border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.more-card:hover{text-decoration:none;transform:translateY(-2px);border-color:#CFE0FA;box-shadow:var(--shadow-hover);}
.more-card .tag{margin-bottom:10px;}
.more-card strong{display:block;font-size:16px;color:var(--ink);line-height:1.5;margin-bottom:6px;}
.more-card span{display:block;font-size:13.5px;color:var(--ink-2);line-height:1.7;}
/* ---------- prev next ---------- */
.prevnext{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.prevnext .btn{flex:1 1 200px;}
/* ---------- disclaimer ---------- */
.disclaimer{margin-top:32px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--risk);border-radius:var(--radius-md);padding:24px 26px;}
.disclaimer h2{font-size:17px;margin:0 0 10px;}
.disclaimer p{font-size:14px;color:var(--ink-2);line-height:1.8;margin:0 0 10px;}
.disclaimer p:last-child{margin-bottom:0;}
/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(135deg,#EAF1FE 0%,#F4F9FF 60%,#F6F8FC 100%);border-top:1px solid var(--line);padding:58px 0;}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;}
.cta-copy h2{font-size:clamp(22px,2.6vw,30px);margin:0 0 10px;line-height:1.35;}
.cta-copy p{color:var(--ink-2);margin:0;font-size:15px;max-width:620px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
/* ---------- footer ---------- */
.site-footer{background:var(--footer);color:#C6CFDE;padding:64px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{color:#fff;font-size:16px;}
.footer-brand .brand-sub{color:#8FA0BC;font-size:12px;}
.site-footer h4{color:#fff;font-size:14.5px;margin:0 0 16px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:#C6CFDE;font-size:14px;}
.footer-links a:hover{color:#fff;text-decoration:none;}
.footer-about{font-size:13.5px;line-height:1.8;color:#9AA8BF;margin:0;}
.footer-note{font-size:12.5px;color:#7E8CA6;margin:14px 0 0;line-height:1.7;}
.footer-bottom{
  margin-top:38px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;font-size:13px;color:#8593AB;
}
/* ---------- responsive ---------- */
@media (max-width:1023px){
  .article-layout{grid-template-columns:minmax(0,1fr);}
  .article-side{position:static;top:auto;order:2;}
  .mobile-toc{display:block;background:#fff;border-bottom:1px solid var(--line);}
  .mobile-toc .toc-scroll{display:flex;gap:8px;overflow-x:auto;padding:10px 24px;scrollbar-width:none;-ms-overflow-style:none;}
  .mobile-toc .toc-scroll::-webkit-scrollbar{display:none;}
  .mobile-toc a{
    flex:0 0 auto;padding:8px 14px;border-radius:999px;background:#F1F4F9;
    font-size:13.5px;font-weight:600;color:var(--ink-2);white-space:nowrap;
  }
  .mobile-toc a:hover{background:var(--brand-soft);color:var(--brand-dark);text-decoration:none;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-card{padding:32px;}
  .block{padding:28px;}
}
@media (max-width:768px){
  .container{padding:0 18px;}
  .brand-row{min-height:auto;gap:14px;}
  .brand-tools{flex:1 1 100%;justify-content:space-between;}
  .search-form{max-width:none;}
  .article-main{padding:32px 0 56px;}
  .check-grid,.signal-grid,.dl-buttons,.more-grid{grid-template-columns:minmax(0,1fr);}
  .cta-inner{flex-direction:column;align-items:flex-start;}
  .article-card{padding:24px;}
  .block{padding:24px;}
  .article-body{font-size:16px;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .site-footer{padding:44px 0 24px;}
}
@media (max-width:520px){
  .brand-name{font-size:15.5px;}
  .brand-sub{font-size:11px;}
  .article-head{padding:24px 0 32px;}
  .article-meta{font-size:12.5px;gap:6px 14px;}
  .dl-buttons .btn{width:100%;}
  .prevnext .btn{flex:1 1 100%;}
  .block-head h2{font-size:21px;}
}

/* roulang page: category1 */
:root{
  --brand:#2F6FED;
  --brand-dark:#1E4FBF;
  --brand-soft:#EAF1FE;
  --safe:#14B8A6;
  --safe-soft:#E3F8F5;
  --risk:#F9735B;
  --risk-soft:#FDECE8;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --ink:#172033;
  --ink-2:#5B6578;
  --line:#E4EAF2;
  --footer:#101828;
  --radius-lg:18px;
  --radius-md:14px;
  --radius-sm:12px;
  --shadow:0 10px 30px rgba(23,32,51,.07);
  --shadow-hover:0 16px 40px rgba(47,111,237,.12);
  --container:1200px;
  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-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(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border-radius:var(--radius-md);}
a{color:var(--brand);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--brand-dark);text-decoration:underline;}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;line-height:1.3;letter-spacing:-.01em;}
p{margin:0 0 16px;}
p:last-child{margin-bottom:0;}
ul,ol{margin:0;padding:0;list-style:none;}
section[id],div[id]{scroll-margin-top:80px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:var(--radius-sm);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;text-decoration:none;text-align:center;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:2px;}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(47,111,237,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;box-shadow:0 12px 26px rgba(30,79,191,.26);}
.btn-outline{background:#fff;color:var(--brand);border-color:#C9DBFC;}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);border-color:var(--brand);}
.btn-ghost{background:transparent;color:var(--brand);}
.btn-ghost:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-sm{min-height:40px;padding:0 16px;font-size:14px;}
/* ---------- 头部 ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px;padding:12px 0;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto;}
.brand:hover{text-decoration:none;}
.brand-mark{width:42px;height:42px;flex:0 0 42px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;}
.brand-sub{font-size:12px;color:var(--ink-2);font-weight:500;letter-spacing:.02em;}
.brand-tools{display:flex;align-items:center;gap:12px;flex:1 1 320px;justify-content:flex-end;}
.search-form{display:flex;align-items:center;max-width:340px;width:100%;}
.search-field{position:relative;flex:1;}
.search-field svg{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:17px;height:17px;stroke:var(--ink-2);fill:none;}
.search-input{
  width:100%;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 14px 0 38px;font-size:14px;color:var(--ink);background:#FBFCFE;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.search-input::placeholder{color:#8C97A8;}
.search-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(47,111,237,.14);background:#fff;}
/* ---------- 频道导航 ---------- */
.channel-bar{background:#fff;border-top:1px solid var(--line);position:sticky;top:0;z-index:60;box-shadow:0 2px 12px rgba(23,32,51,.05);}
.channel-inner{display:flex;align-items:center;gap:4px;height:52px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channel-inner::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;display:inline-flex;align-items:center;height:52px;padding:0 14px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);white-space:nowrap;border-radius:10px 10px 0 0;
  transition:color .16s ease,background .16s ease;
}
.channel-link:hover{color:var(--brand-dark);background:var(--brand-soft);text-decoration:none;}
.channel-link:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:-3px;}
.channel-link.is-active{color:var(--brand);}
.channel-link.is-active::after{content:"";position:absolute;left:14px;right:14px;bottom:0;height:3px;border-radius:3px 3px 0 0;background:var(--brand);}
/* ---------- 板块基础 ---------- */
.section{padding:80px 0;}
.section.tight{padding:44px 0;}
.section.on-white{background:#fff;}
.section.on-bg{background:var(--bg);}
.section-head{max-width:780px;margin-bottom:36px;}
.section-head h2{font-size:clamp(25px,2.9vw,34px);margin-bottom:12px;}
.section-head p{color:var(--ink-2);margin:0;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:600;margin-bottom:14px;
}
.eyebrow.safe{background:var(--safe-soft);color:#0E8C80;}
.eyebrow.risk{background:var(--risk-soft);color:#C2452F;}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D3E0F7;}
.tag{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand-dark);font-size:12.5px;font-weight:600;}
.tag.safe{background:var(--safe-soft);color:#0E8C80;}
.tag.risk{background:var(--risk-soft);color:#C2452F;}
.tag.plain{background:#F1F4F9;color:var(--ink-2);}
/* ---------- 分类页头 ---------- */
.cat-head{
  background:linear-gradient(180deg,#F2F6FE 0%,#F7F9FD 100%);
  border-bottom:1px solid var(--line);
  padding:34px 0 52px;
}
.breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--ink-2);margin-bottom:20px;}
.breadcrumb a{color:var(--ink-2);font-weight:600;}
.breadcrumb a:hover{color:var(--brand);text-decoration:none;}
.breadcrumb .sep{color:#B7C1D0;}
.breadcrumb .current{color:var(--ink);font-weight:700;}
.cat-head h1{font-size:clamp(28px,3.6vw,44px);line-height:1.2;margin-bottom:18px;max-width:900px;}
.cat-lead{max-width:860px;font-size:16.5px;color:var(--ink-2);line-height:1.85;margin-bottom:24px;}
.cat-tags{display:flex;flex-wrap:wrap;gap:10px;}
/* ---------- 阅读路径 ---------- */
.path-bar{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:32px;align-items:center;padding:30px 32px;}
.path-bar:hover{transform:none;}
.path-copy h2{font-size:20px;margin-bottom:8px;}
.path-copy p{font-size:14.5px;color:var(--ink-2);margin:0;}
.path-links{display:flex;flex-wrap:wrap;gap:10px;}
.path-links a{
  display:inline-flex;align-items:center;min-height:42px;padding:0 16px;border-radius:999px;
  background:#F4F7FC;border:1px solid var(--line);color:var(--ink);font-size:14px;font-weight:600;
  transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease;
}
.path-links a:hover{background:var(--brand-soft);border-color:#C9DBFC;color:var(--brand-dark);text-decoration:none;transform:translateY(-1px);}
.path-links a:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:2px;}
/* ---------- 分栏图文 ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);gap:48px;align-items:center;}
.split-media{position:relative;}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow);}
.media-note{position:absolute;left:16px;bottom:16px;background:#fff;box-shadow:0 8px 22px rgba(23,32,51,.14);}
.split-body h2{font-size:clamp(24px,2.8vw,32px);margin-bottom:14px;}
.split-body p{color:var(--ink-2);}
.mini-list{margin-top:8px;}
.mini-list li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2);padding:7px 0;align-items:flex-start;}
.mini-list li::before{
  content:"";flex:0 0 8px;width:8px;height:8px;border-radius:50%;background:var(--safe);margin-top:10px;
}
.step-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:40px;}
.step-card{padding:28px 24px;position:relative;}
.step-num{
  display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:14px;
  background:var(--brand-soft);color:var(--brand-dark);font-weight:800;font-size:15px;margin-bottom:16px;letter-spacing:.02em;
}
.step-card h3{font-size:19px;margin-bottom:10px;}
.step-card p{font-size:14.5px;color:var(--ink-2);margin:0;}
/* ---------- 信号对照 ---------- */
.signal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
.signal-card{padding:30px 28px;border-radius:var(--radius-lg);}
.signal-card:hover{transform:none;}
.signal-card h3{display:flex;align-items:center;gap:10px;font-size:20px;margin-bottom:8px;}
.signal-card h3 .dot{width:12px;height:12px;border-radius:50%;flex:0 0 12px;}
.signal-card.safe-side{background:#F5FDFB;border-color:#CDEFE9;}
.signal-card.safe-side h3 .dot{background:var(--safe);}
.signal-card.risk-side{background:#FFF8F6;border-color:#FBDDD5;}
.signal-card.risk-side h3 .dot{background:var(--risk);}
.signal-sub{font-size:14px;color:var(--ink-2);margin-bottom:18px;}
.signal-list li{position:relative;padding:10px 0 10px 26px;font-size:15px;color:var(--ink);border-bottom:1px dashed #E1E8F2;line-height:1.7;}
.signal-list li:last-child{border-bottom:none;}
.signal-list li::before{
  content:"";position:absolute;left:2px;top:18px;width:10px;height:10px;border-radius:3px;
}
.safe-side .signal-list li::before{background:var(--safe);}
.risk-side .signal-list li::before{background:var(--risk);}
/* ---------- 场景卡 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
.scene-card{overflow:hidden;display:flex;flex-direction:column;}
.scene-card figure{margin:0;position:relative;}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;}
.scene-card figure .tag{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94);color:var(--brand-dark);box-shadow:0 6px 16px rgba(23,32,51,.12);}
.scene-body{padding:22px 24px 26px;}
.scene-body h3{font-size:19px;margin-bottom:10px;}
.scene-body p{font-size:14.5px;color:var(--ink-2);margin:0;}
/* ---------- 认证与隐私 ---------- */
.privacy-wrap{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:48px;align-items:start;}
.privacy-wrap img{width:100%;aspect-ratio:16/11;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow);}
.privacy-list{counter-reset:pl;margin-top:20px;}
.privacy-list li{
  position:relative;padding:14px 0 14px 48px;font-size:15px;color:var(--ink-2);border-bottom:1px solid var(--line);line-height:1.75;
}
.privacy-list li:last-child{border-bottom:none;}
.privacy-list li::before{
  counter-increment:pl;content:counter(pl,decimal-leading-zero);
  position:absolute;left:0;top:14px;width:32px;height:32px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-soft);color:var(--brand-dark);font-size:13px;font-weight:800;
}
.privacy-list strong{color:var(--ink);font-weight:700;}
.notice{
  margin-top:22px;padding:16px 18px;border-radius:var(--radius-md);
  background:var(--risk-soft);color:#9C3A27;font-size:14px;line-height:1.75;border:1px solid #F8D7CE;
}
/* ---------- 文章列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:26px;}
.post-card{overflow:hidden;}
.post-link{display:flex;flex-direction:column;height:100%;color:inherit;}
.post-link:hover{text-decoration:none;color:inherit;}
.post-thumb{overflow:hidden;}
.post-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;transition:transform .3s ease;}
.post-link:hover .post-thumb img{transform:scale(1.03);}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto;}
.post-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}
.post-body h3{font-size:18.5px;line-height:1.45;margin-bottom:10px;transition:color .18s ease;}
.post-link:hover .post-body h3{color:var(--brand-dark);}
.post-body p{font-size:14.5px;color:var(--ink-2);margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.post-meta{margin-top:auto;display:flex;align-items:center;gap:14px;font-size:13px;color:#8892A4;}
.empty-state{padding:44px 28px;text-align:center;border-style:dashed;background:#FBFCFE;color:var(--ink-2);font-size:15px;}
.empty-state:hover{transform:none;box-shadow:var(--shadow);}
.list-more{display:flex;justify-content:center;margin-top:36px;}
/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);box-shadow:var(--shadow);transition:border-color .18s ease,box-shadow .18s ease;}
.faq-item[open]{border-color:#C9DBFC;box-shadow:var(--shadow-hover);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:14px;
  padding:20px 22px;font-size:16px;font-weight:700;color:var(--ink);min-height:44px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:focus-visible{outline:3px solid rgba(47,111,237,.28);outline-offset:-3px;border-radius:var(--radius-md);}
.faq-item summary::after{
  content:"";margin-left:auto;flex:0 0 12px;width:12px;height:12px;border-right:2.4px solid var(--brand);border-bottom:2.4px solid var(--brand);
  transform:rotate(45deg) translateY(-2px);transition:transform .2s ease;margin-top:6px;
}
.faq-item[open] summary::after{transform:rotate(-135deg) translateY(-2px);}
.faq-answer{padding:0 22px 22px;font-size:15px;color:var(--ink-2);line-height:1.85;}
.faq-answer strong{color:var(--ink);}
/* ---------- 下载条 ---------- */
.dl-band{
  background:#fff;border:1px solid #D8E5FB;border-radius:22px;box-shadow:var(--shadow-hover);
  padding:38px 40px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px;align-items:center;
}
.dl-copy h2{font-size:clamp(23px,2.6vw,30px);margin-bottom:12px;}
.dl-copy p{color:var(--ink-2);font-size:15px;margin:0;}
.dl-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;}
.dl-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  min-height:76px;padding:12px 8px;border-radius:var(--radius-md);background:var(--brand);color:#fff;
  font-size:14px;font-weight:700;text-align:center;box-shadow:0 10px 24px rgba(47,111,237,.22);
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease;
}
.dl-btn span{font-size:11.5px;font-weight:500;opacity:.85;}
.dl-btn:hover{background:var(--brand-dark);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 14px 30px rgba(30,79,191,.28);}
.dl-btn:active{transform:translateY(0);}
.dl-btn:focus-visible{outline:3px solid rgba(47,111,237,.32);outline-offset:3px;}
.dl-note{margin-top:18px;font-size:13px;color:#8892A4;text-align:center;}
/* ---------- 页脚 ---------- */
.site-footer{background:var(--footer);color:#C6CEDB;padding:64px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1);}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.01em;}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.footer-brand .brand-name{color:#fff;font-size:16px;}
.footer-brand .brand-sub{color:#8D9AB0;}
.footer-about{font-size:14px;line-height:1.8;color:#9AA6B8;margin:0 0 12px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{color:#C6CEDB;font-size:14px;transition:color .16s ease;}
.footer-links a:hover{color:#fff;text-decoration:none;}
.footer-links a:focus-visible{outline:2px solid rgba(255,255,255,.4);outline-offset:3px;border-radius:4px;}
.footer-note{font-size:12.5px;color:#7C889C;line-height:1.7;margin:14px 0 0;}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:13px;color:#7C889C;}
/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .section{padding:64px 0;}
  .split,.privacy-wrap,.dl-band,.path-bar{grid-template-columns:minmax(0,1fr);gap:28px;}
  .step-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .brand-tools{flex:1 1 100%;justify-content:flex-start;}
  .search-form{max-width:100%;}
}
@media (max-width:768px){
  .section{padding:52px 0;}
  .section.tight{padding:32px 0;}
  .cat-head{padding:26px 0 40px;}
  .signal-grid,.scene-grid,.post-grid,.step-grid,.dl-actions{grid-template-columns:minmax(0,1fr);}
  .path-bar{padding:24px 22px;}
  .dl-band{padding:28px 22px;}
  .dl-btn{min-height:66px;}
  .channel-inner{height:50px;}
  .channel-link{height:50px;padding:0 12px;font-size:14px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;gap:6px;}
  .brand-name{font-size:16px;}
  .brand-tools{flex-direction:column;align-items:stretch;gap:10px;}
  .search-form{max-width:100%;}
  .brand-tools .btn{width:100%;}
}
@media (max-width:520px){
  .container{padding:0 16px;}
  .cat-head h1{font-size:26px;}
  .cat-lead{font-size:15px;}
  .step-card,.signal-card{padding:22px 18px;}
  .post-body,.scene-body{padding:18px 18px 20px;}
  .faq-item summary{padding:16px 16px;font-size:15px;}
  .faq-answer{padding:0 16px 18px;font-size:14.5px;}
  .privacy-list li{padding-left:42px;}
}