/* roulang page: index */
:root{
  --c-primary:#2B4A6F;
  --c-primary-dark:#1E3550;
  --c-accent:#E4703C;
  --c-ink:#1B2A3D;
  --c-text:#3A4A5E;
  --c-muted:#7C8BA0;
  --c-line:#E2E8F0;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-soft:#EDF2F8;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(28,50,80,.06);
  --sh-2:0 6px 20px rgba(28,50,80,.08);
  --sh-3:0 16px 40px rgba(28,50,80,.12);
  --container:1200px;
  --sp:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.85;color:var(--c-text);background:var(--c-surface);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0 0 12px;color:var(--c-ink);font-weight:700;letter-spacing:-.3px;line-height:1.36}
h1{font-size:clamp(30px,3.6vw,42px)}
h2{font-size:clamp(24px,2.4vw,32px)}
h3{font-size:20px}
h4{font-size:17px}
p{margin:0 0 16px}
a{color:var(--c-primary);text-decoration:none;transition:color .3s ease}
a:hover{color:var(--c-primary-dark)}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
time{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ============ Buttons / badges ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
  white-space:nowrap;border:1px solid transparent;
  transition:background .22s ease,box-shadow .22s ease,transform .12s ease,color .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:rgba(43,74,111,.08);color:var(--c-primary-dark)}
.btn-ghost{border-color:#CFDAE6;color:var(--c-text);background:transparent}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-white{background:#fff;color:var(--c-primary-dark)}
.btn-white:hover{background:#fff;color:var(--c-primary);box-shadow:var(--sh-2)}
.btn-white-line{border-color:rgba(255,255,255,.65);color:#fff;background:transparent}
.btn-white-line:hover{background:rgba(255,255,255,.12);color:#fff}
.btn-sm{padding:9px 18px;font-size:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  background:#E8EFF7;color:var(--c-primary);
  font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.badge-accent{background:rgba(228,112,60,.12);color:#B9522A}
.link-more{font-size:14px;font-weight:600;white-space:nowrap}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:120;background:#fff;transition:box-shadow .22s ease}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(28,50,80,.08)}
.topbar{
  height:34px;background:#F2F6FA;border-bottom:1px solid var(--c-line);
  font-size:12px;color:var(--c-muted);overflow:hidden;
  transition:height .22s ease,opacity .22s ease;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:34px;gap:16px}
.topbar-age{display:inline-flex;align-items:center;gap:6px;color:#B9522A;font-weight:600}
.topbar-links{display:flex;align-items:center;gap:0}
.topbar-links a{color:var(--c-muted);padding:0 12px;font-size:12px}
.topbar-links a:hover{color:var(--c-primary)}
.topbar-links .sep{width:1px;height:11px;background:#D8DFE8}
.topbar-cta{color:var(--c-primary);font-weight:600;font-size:12px}
.site-header.is-scrolled .topbar{height:0;opacity:0;border-bottom-color:transparent}

.masthead{border-bottom:1px solid var(--c-line)}
.masthead-inner{display:flex;align-items:center;gap:24px;height:96px;transition:height .22s ease}
.site-header.is-scrolled .masthead-inner{height:64px}
.brand{display:flex;flex-direction:column;gap:2px;flex-shrink:0;line-height:1.1;padding-bottom:4px;border-bottom:1px solid var(--c-ink)}
.brand-mark{font-size:clamp(26px,3.2vw,40px);font-weight:700;letter-spacing:-.5px;color:var(--c-ink);transition:font-size .22s ease}
.site-header.is-scrolled .brand-mark{font-size:22px}
.brand-sub{font-size:11px;letter-spacing:2px;color:var(--c-muted);white-space:nowrap}
.channels{display:flex;align-items:center;margin-left:auto}
.channels a{position:relative;padding:0 13px;font-size:15px;color:var(--c-text);white-space:nowrap;line-height:1.6}
.channels a:not(:last-child)::after{
  content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:#D8DFE8;
}
.channels a::before{
  content:"";position:absolute;left:13px;right:13px;bottom:-4px;height:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.channels a:hover{color:var(--c-primary)}
.channels a:hover::before,.channels a.is-active::before{transform:scaleX(1)}
.channels a.is-active{color:var(--c-primary);font-weight:600}
.mast-actions{display:flex;gap:10px;flex-shrink:0}
.burger{display:none;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--c-line);align-items:center;justify-content:center;flex-direction:column;gap:5px;margin-left:auto}
.burger span{display:block;width:20px;height:2px;background:var(--c-ink);border-radius:2px;transition:.2s}

/* ============ Drawer ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(20,34,52,.45);z-index:190;opacity:0;visibility:hidden;transition:opacity .28s ease}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;width:320px;max-width:86vw;height:100%;
  background:#fff;z-index:200;transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;padding:22px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.drawer-title{font-size:20px;font-weight:700;color:var(--c-ink)}
.drawer-close{width:38px;height:38px;border-radius:50%;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--c-muted)}
.drawer-nav{margin-top:8px;display:flex;flex-direction:column}
.drawer-nav a{padding:14px 2px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-ink);font-weight:500}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:700}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}
.drawer-age{margin-top:12px;font-size:12px;color:var(--c-muted);text-align:center}

/* ============ Section base ============ */
.section{padding:var(--sp) 0}
.section--soft{background:var(--c-soft)}
.section--white{background:var(--c-surface)}
.sec-head{max-width:62ch;margin-bottom:40px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.sec-eyebrow{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--c-accent);font-weight:700;margin-bottom:10px}
.sec-title{margin-bottom:12px}
.sec-desc{color:var(--c-text);margin:0;font-size:16px}
.sec-head--center{text-align:center;margin-left:auto;margin-right:auto}
.sec-head--center .sec-desc{margin-left:auto;margin-right:auto}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:64px 0 84px;
  background-image:linear-gradient(180deg,rgba(246,249,253,.95) 0%,rgba(246,249,253,.97) 55%,#FFFFFF 100%),
    url('/assets/images/5972bf2400e6cde6.webp');
  background-size:cover;background-position:center;background-repeat:no-repeat;
}
.hero::after{
  content:"";position:absolute;right:-200px;top:-180px;width:560px;height:560px;border-radius:50%;
  background:var(--c-primary);opacity:.06;pointer-events:none;
}
.hero-inner{position:relative;z-index:1}
.hero-head{text-align:center;max-width:920px;margin:0 auto 48px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);
  background:#E8EFF7;color:var(--c-primary);font-size:12px;font-weight:600;margin-bottom:18px;
}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:inline-block}
.hero h1{margin-bottom:18px}
.hero-sub{font-size:17px;color:var(--c-text);max-width:780px;margin:0 auto 22px}
.hero-chips{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}
.hero-grid{display:grid;grid-template-columns:1fr 300px 1fr;gap:36px;align-items:center}
.hero-points{display:flex;flex-direction:column;gap:14px}
.hero-point{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:16px 18px;box-shadow:var(--sh-1);
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s;
}
.hero-point:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6}
.hero-point strong{display:block;font-size:15px;color:var(--c-ink);margin-bottom:2px}
.hero-point span{font-size:13px;color:var(--c-muted);line-height:1.7}
.hero-stage{position:relative}
.stage-frame{
  aspect-ratio:9/16;border-radius:26px;overflow:hidden;background:#fff;
  box-shadow:0 18px 48px rgba(28,50,80,.18),0 2px 8px rgba(28,50,80,.08);
}
.stage-frame img{width:100%;height:100%;object-fit:cover}
.stage-tag{
  position:absolute;left:-16px;top:48px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-pill);padding:6px 14px;font-size:12px;font-weight:600;color:var(--c-primary);
  box-shadow:var(--sh-2);
}
.stage-tag.two{left:auto;right:-16px;top:auto;bottom:72px;color:#B9522A;background:#fff}
.hero-dl{display:flex;flex-direction:column;gap:14px}
.dl-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--sh-1);
}
.dl-card h3{font-size:17px;margin-bottom:6px}
.dl-card p{font-size:13px;color:var(--c-muted);margin:0 0 14px;line-height:1.7}
.dl-card .btn{width:100%}
.dl-card .btn + .btn{margin-top:10px}
.hero-note{font-size:13px;color:var(--c-muted);text-align:center;margin:36px auto 0;max-width:780px}

/* ============ TOC ============ */
.toc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.toc-item{
  display:flex;gap:12px;align-items:flex-start;
  padding:18px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);color:var(--c-text);
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s;
}
.toc-item:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6;color:var(--c-text)}
.toc-num{font-size:13px;font-weight:700;color:var(--c-primary);opacity:.55;font-variant-numeric:tabular-nums;line-height:1.6}
.toc-item strong{display:block;font-size:15px;color:var(--c-ink);margin-bottom:2px}
.toc-item em{font-style:normal;font-size:12px;color:var(--c-muted);line-height:1.6}

/* ============ Abilities ============ */
.ability-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.ability-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s;
}
.ability-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6}
.ability-card.big{grid-column:span 2;grid-row:span 2;padding:0;overflow:hidden}
.ability-card.big .big-media{aspect-ratio:16/9;overflow:hidden}
.ability-card.big .big-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.ability-card.big:hover .big-media img{transform:scale(1.03)}
.ability-card.big .big-body{padding:24px}
.ability-ico{
  width:44px;height:44px;border-radius:12px;background:#E8EFF7;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;flex-shrink:0;
}
.ability-card h3{font-size:17px;margin-bottom:8px}
.ability-card p{font-size:14px;color:var(--c-muted);margin:0 0 14px;line-height:1.75}
.ability-link{margin-top:auto;font-size:13px;font-weight:600}

/* ============ Stats bar ============ */
.stats-bar{background:#22364F;padding:56px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:0 28px;border-left:1px solid rgba(255,255,255,.14);color:#DCE6F2}
.stat:first-child{border-left:0;padding-left:0}
.stat b{display:block;font-size:40px;font-weight:700;color:#fff;line-height:1.15;font-variant-numeric:tabular-nums;letter-spacing:-1px}
.stat span{display:block;font-size:13px;color:#9FB4CE;margin-top:6px;line-height:1.7}

/* ============ Flow ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.flow-step{position:relative;padding-right:10px}
.flow-step:not(:last-child)::after{
  content:"";position:absolute;right:-14px;top:22px;width:calc(100% - 30px);
  border-top:2px dashed #CFDAE6;
}
.flow-num{
  width:44px;height:44px;border-radius:50%;background:#E8EFF7;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;
  margin-bottom:14px;position:relative;z-index:1;
}
.flow-step h3{font-size:17px;margin-bottom:6px}
.flow-step p{font-size:14px;color:var(--c-muted);margin:0;line-height:1.75}

/* ============ Scenes ============ */
.scene-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:18px}
.scene-card{
  grid-column:span 3;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s;
}
.scene-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6}
.scene-card.span2{grid-column:span 2}
.scene-card.span4{grid-column:span 4}
.scene-media{aspect-ratio:16/9;overflow:hidden}
.scene-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.scene-card:hover .scene-media img{transform:scale(1.03)}
.scene-body{padding:20px 22px 22px}
.scene-body h3{font-size:17px;margin-bottom:8px}
.scene-body p{font-size:14px;color:var(--c-muted);margin:0;line-height:1.75}
.scene-card.span2 .scene-body,.scene-card.span3 .scene-body{padding:22px}

/* ============ Plans ============ */
.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.plan-card{
  position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);
  padding:30px;box-shadow:var(--sh-1);
}
.plan-card.pro{border:2px solid var(--c-primary);box-shadow:var(--sh-2)}
.plan-flag{
  position:absolute;top:-13px;right:24px;background:var(--c-accent);color:#fff;
  font-size:12px;font-weight:600;padding:4px 14px;border-radius:var(--r-pill);
}
.plan-card h3{font-size:20px;margin-bottom:6px}
.plan-price{font-size:13px;color:var(--c-muted);margin-bottom:18px}
.plan-list li{
  display:flex;gap:10px;align-items:flex-start;
  padding:11px 0;border-bottom:1px dashed var(--c-line);font-size:15px;line-height:1.7;
}
.plan-list li:last-child{border-bottom:0}
.plan-list .yes{color:var(--c-primary);flex-shrink:0;font-weight:700}
.plan-list .no{color:#B6C2D0;flex-shrink:0;font-weight:700}
.plan-list li.off{color:var(--c-muted)}
.plan-card .btn{width:100%;margin-top:20px}

/* ============ Security ============ */
.security-grid{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:48px;align-items:start}
.security-left h2{margin-bottom:14px}
.security-left p{font-size:15px;color:var(--c-text)}
.sec-list{display:flex;flex-direction:column}
.sec-row{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--c-line);align-items:flex-start}
.sec-row:first-child{padding-top:0}
.sec-row:last-child{border-bottom:0;padding-bottom:0}
.sec-ico{
  width:42px;height:42px;border-radius:12px;background:#E8EFF7;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.sec-row h3{font-size:16px;margin-bottom:4px}
.sec-row p{font-size:14px;color:var(--c-muted);margin:0;line-height:1.75}

/* ============ Reviews ============ */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:22px;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1);
}
.review-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{
  width:40px;height:40px;border-radius:50%;background:#E8EFF7;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;flex-shrink:0;
}
.review-head strong{display:block;font-size:14px;color:var(--c-ink)}
.review-head em{display:block;font-style:normal;font-size:12px;color:var(--c-muted)}
.review-card p{font-size:14px;color:var(--c-text);margin:0 0 14px;line-height:1.8}
.review-foot{margin-top:auto;font-size:11px;color:#A8B5C6;text-align:right}

/* ============ Devices ============ */
.device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.device-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  padding:24px;box-shadow:var(--sh-1);display:flex;gap:16px;align-items:flex-start;
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s;
}
.device-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6}
.device-ico{
  width:48px;height:48px;border-radius:14px;background:#E8EFF7;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.device-card h3{font-size:16px;margin-bottom:6px}
.device-card p{font-size:13px;color:var(--c-muted);margin:0 0 10px;line-height:1.75}
.device-card a{font-size:13px;font-weight:600}

/* ============ News (CMS) ============ */
.news-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;align-items:start}
.news-lead{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1),transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s;
}
.news-lead:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6}
.news-lead-media{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--c-soft)}
.news-lead-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.news-lead:hover .news-lead-media img{transform:scale(1.03)}
.news-lead-body{padding:24px}
.news-lead-body h3{font-size:20px;margin:10px 0 10px}
.news-lead-body h3 a{color:var(--c-ink)}
.news-lead-body h3 a:hover{color:var(--c-primary)}
.news-lead-body p{font-size:14px;color:var(--c-muted);margin:0 0 14px;line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:#A8B5C6;flex-wrap:wrap}
.news-list{display:flex;flex-direction:column;gap:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:6px 22px}
.news-list li{border-bottom:1px solid var(--c-line)}
.news-list li:last-child{border-bottom:0}
.news-list a{display:block;padding:16px 0;color:var(--c-text)}
.news-list a:hover h4{color:var(--c-primary)}
.news-list h4{font-size:15px;margin:0 0 6px;color:var(--c-ink);transition:color .2s ease;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.news-list p{font-size:13px;color:var(--c-muted);margin:0 0 8px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  display:flex;align-items:center;justify-content:center;gap:10px;
  padding:56px 24px;background:#fff;border:1px dashed #CFDAE6;border-radius:var(--r-md);
  color:var(--c-muted);font-size:14px;grid-column:1/-1;
}

/* ============ Guide ============ */
.guide-list{display:grid;grid-template-columns:1fr 1fr;gap:12px 32px}
.guide-list li a{
  display:flex;align-items:center;gap:16px;padding:16px 14px;border-radius:var(--r-sm);
  color:var(--c-text);transition:background .22s ease,transform .22s ease;
}
.guide-list li a:hover{background:#fff;transform:translateX(4px);box-shadow:var(--sh-1)}
.guide-num{font-size:15px;font-weight:700;color:var(--c-primary);opacity:.5;font-variant-numeric:tabular-nums;flex-shrink:0}
.guide-body{flex:1;min-width:0}
.guide-body strong{display:block;font-size:15px;color:var(--c-ink);margin-bottom:2px;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.guide-body em{font-style:normal;font-size:12px;color:var(--c-muted);
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.guide-arrow{color:#B6C2D0;font-size:16px;flex-shrink:0}

/* ============ Partners ============ */
.partner-note{font-size:13px;color:var(--c-muted);margin:0 0 20px}
.partner-row{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.partner-logo{
  height:56px;border-radius:var(--r-sm);background:#fff;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;color:#A8B5C6;letter-spacing:1px;
  transition:opacity .22s ease,color .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.partner-logo:hover{opacity:.6;color:var(--c-primary);border-color:#CBD8E6;box-shadow:var(--sh-1)}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px 22px}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;
  transition:box-shadow .22s ease,border-color .22s ease;
}
.faq-item:hover{box-shadow:var(--sh-2);border-color:#CBD8E6}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;text-align:left;font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.6;
}
.faq-icon{
  width:22px;height:22px;flex-shrink:0;position:relative;
  transition:transform .24s ease;color:var(--c-primary);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:currentColor;border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:12px;height:2px}
.faq-icon::after{width:2px;height:12px;transition:opacity .24s ease}
.faq-item.is-open .faq-icon{transform:rotate(180deg)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 20px;font-size:15px;line-height:1.85;color:var(--c-text)}

/* ============ Download CTA ============ */
.dl-panel{
  background:var(--c-primary);border-radius:var(--r-lg);padding:40px;
  display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:40px;align-items:center;
  box-shadow:var(--sh-3);color:#E8EFF7;
}
.dl-panel h2{color:#fff;margin-bottom:12px}
.dl-panel p{color:#C7D6E6;font-size:15px;margin:0 0 20px}
.dl-actions{display:flex;gap:12px;flex-wrap:wrap}
.dl-form{background:#fff;border-radius:var(--r-md);padding:24px}
.dl-form h3{font-size:17px;margin-bottom:4px}
.dl-form .form-tip{font-size:12px;color:var(--c-muted);margin:0 0 16px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--c-ink);margin-bottom:6px}
.field input,.field select{
  width:100%;padding:12px 14px;border:1px solid var(--c-line);border-radius:var(--r-sm);
  font-size:14px;color:var(--c-ink);background:#F9FBFD;font-family:inherit;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--c-primary);background:#fff;box-shadow:0 0 0 3px rgba(43,74,111,.12);
}
.dl-form .btn{width:100%}
.guard-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px}
.guard-item{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--c-text)}
.guard-item svg{flex-shrink:0;color:var(--c-primary)}

/* ============ Footer ============ */
.site-footer{background:#1B2A3D;color:#93A5BC;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-logo{font-size:26px;font-weight:700;color:#fff;letter-spacing:-.5px;line-height:1.2}
.footer-sub{display:block;font-size:12px;letter-spacing:1.5px;color:#6C809A;margin:6px 0 14px}
.footer-brand p{font-size:13px;line-height:1.8;color:#8497AE;margin:0 0 16px}
.age-tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);
  background:rgba(228,112,60,.16);color:#F0A277;font-size:12px;font-weight:600;
}
.footer-col h4{color:#fff;font-size:14px;margin:0 0 16px;letter-spacing:.5px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:#93A5BC;font-size:13px}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12px;color:#6C809A;
}
.footer-bottom a{color:#6C809A}
.footer-bottom a:hover{color:#fff}

/* ============ Responsive ============ */
@media (max-width:1200px){
  .container{padding:0 32px}
  .masthead-inner{gap:18px}
  .channels a{padding:0 10px;font-size:14px}
  .channels a::before{left:10px;right:10px}
}
@media (max-width:1080px){
  .channels,.mast-actions{display:none}
  .burger{display:flex}
  .hero-grid{grid-template-columns:1fr 260px 1fr;gap:22px}
}
@media (max-width:992px){
  :root{--sp:72px}
  .hero{padding:52px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:32px;max-width:420px;margin:0 auto}
  .hero-dl{order:-1}
  .stage-tag,.stage-tag.two{display:none}
  .toc-grid{grid-template-columns:repeat(2,1fr)}
  .ability-grid{grid-template-columns:1fr 1fr}
  .ability-card.big{grid-column:span 2;grid-row:auto}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px 0}
  .stat:nth-child(3){border-left:0;padding-left:0}
  .flow{grid-template-columns:1fr 1fr;gap:26px 22px}
  .flow-step::after{display:none}
  .scene-grid{grid-template-columns:1fr 1fr;gap:18px}
  .scene-card,.scene-card.span2,.scene-card.span4{grid-column:span 1}
  .plan-grid{grid-template-columns:1fr}
  .security-grid{grid-template-columns:1fr;gap:32px}
  .review-grid{grid-template-columns:1fr 1fr}
  .device-grid{grid-template-columns:1fr}
  .news-layout{grid-template-columns:1fr}
  .guide-list{grid-template-columns:1fr}
  .partner-row{grid-template-columns:repeat(3,1fr)}
  .faq-grid{grid-template-columns:1fr}
  .dl-panel{grid-template-columns:1fr;padding:32px;gap:28px}
  .guard-row{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  :root{--sp:56px}
  html{scroll-padding-top:84px}
  .container{padding:0 20px}
  .masthead-inner{height:72px}
  .site-header.is-scrolled .masthead-inner{height:60px}
  .brand-sub{font-size:10px;letter-spacing:1px}
  .topbar-links a{padding:0 8px}
  .topbar-cta{display:none}
  .hero-sub{font-size:15px}
  .sec-head--row{flex-direction:column;align-items:flex-start;gap:12px}
  .stat b{font-size:32px}
  .review-grid{grid-template-columns:1fr}
  .ability-grid{grid-template-columns:1fr}
  .ability-card.big{grid-column:span 1}
  .scene-grid{grid-template-columns:1fr}
  .toc-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr;gap:24px}
  .stat{border-left:0;padding:0 0 0 16px;border-bottom:0;border-left:2px solid rgba(255,255,255,.18)}
  .stat:first-child{padding-left:16px}
  .partner-row{grid-template-columns:1fr 1fr}
  .dl-panel{padding:26px}
  .guard-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .btn{width:100%}
  .mast-actions .btn,.hero-chips .badge{width:auto}
  .dl-actions .btn{width:100%}
  .news-lead-body,.plan-card,.review-card{padding:20px}
  .faq-q{font-size:15px;padding:16px}
  .faq-a-inner{padding:0 16px 18px;font-size:14px}
  h1{font-size:26px}
  .stage-frame{border-radius:20px}
}

/* roulang page: article */
:root{
  --c-primary:#2B4A6F;
  --c-primary-dark:#1E3550;
  --c-accent:#E4703C;
  --c-ink:#1B2A3D;
  --c-text:#3A4A5E;
  --c-muted:#7C8BA0;
  --c-line:#E2E8F0;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-soft:#EDF2F8;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(28,50,80,.06);
  --sh-2:0 6px 20px rgba(28,50,80,.08);
  --sh-3:0 16px 40px rgba(28,50,80,.12);
  --container:1200px;
  --sp:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:110px}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.85;color:var(--c-text);background:var(--c-surface);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;color:var(--c-ink);font-weight:700;letter-spacing:-.3px;line-height:1.35}
p{margin:0 0 16px}
p:last-child{margin-bottom:0}
a{color:var(--c-primary);text-decoration:none;transition:color .3s ease}
a:hover{color:var(--c-primary-dark)}
img{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0 0 16px;padding-left:22px}
li{margin-bottom:8px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
  white-space:nowrap;border:1px solid transparent;
  transition:background .22s ease,box-shadow .22s ease,transform .12s ease,color .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:rgba(43,74,111,.08);color:var(--c-primary-dark)}
.btn-ghost{border-color:#CFDAE6;color:var(--c-text);background:transparent}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-white{background:#fff;color:var(--c-primary-dark)}
.btn-white:hover{background:#fff;color:var(--c-primary);box-shadow:var(--sh-2)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  background:#E8EFF7;color:var(--c-primary);
  font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.badge-accent{background:rgba(228,112,60,.12);color:#B9522A}

/* ============ Header ============ */
.site-header{position:sticky;top:0;z-index:120;background:#fff;transition:box-shadow .22s ease}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(28,50,80,.08)}
.topbar{
  height:34px;background:#F2F6FA;border-bottom:1px solid var(--c-line);
  font-size:12px;color:var(--c-muted);overflow:hidden;
  transition:height .22s ease,opacity .22s ease;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:34px;gap:16px}
.topbar-age{display:inline-flex;align-items:center;gap:6px;color:#B9522A;font-weight:600}
.topbar-links{display:flex;align-items:center;gap:0}
.topbar-links a{color:var(--c-muted);padding:0 12px;font-size:12px}
.topbar-links a:hover{color:var(--c-primary)}
.topbar-links .sep{width:1px;height:11px;background:#D8DFE8}
.topbar-cta{color:var(--c-primary);font-weight:600;font-size:12px}
.site-header.is-scrolled .topbar{height:0;opacity:0;border-bottom-color:transparent}
.masthead-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:88px;transition:height .22s ease}
.site-header.is-scrolled .masthead-inner{height:64px}
.brand{display:flex;flex-direction:column;gap:2px;flex-shrink:0;line-height:1.1;padding-bottom:4px;border-bottom:1px solid var(--c-ink);color:var(--c-ink)}
.brand-mark{font-size:clamp(26px,3.2vw,40px);font-weight:700;letter-spacing:-.5px;color:var(--c-ink);transition:font-size .22s ease}
.site-header.is-scrolled .brand-mark{font-size:22px}
.brand-sub{font-size:11px;letter-spacing:2px;color:var(--c-muted);white-space:nowrap}
.channels{display:flex;align-items:center;flex-wrap:nowrap}
.channels a{position:relative;padding:0 13px;font-size:15px;color:var(--c-text);white-space:nowrap;line-height:1.6}
.channels a:not(:last-child)::after{
  content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:#D8DFE8;
}
.channels a::before{
  content:"";position:absolute;left:13px;right:13px;bottom:-4px;height:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.channels a:hover{color:var(--c-primary)}
.channels a:hover::before,.channels a.is-active::before{transform:scaleX(1)}
.channels a.is-active{color:var(--c-primary);font-weight:600}
.mast-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.burger{display:none;width:44px;height:44px;flex-direction:column;justify-content:center;align-items:center;gap:5px;border:1px solid var(--c-line);border-radius:var(--r-sm)}
.burger span{display:block;width:20px;height:2px;background:var(--c-ink);border-radius:2px}

/* ============ Drawer ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(20,34,52,.45);z-index:190;opacity:0;visibility:hidden;transition:opacity .28s ease}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;width:320px;max-width:86vw;height:100%;
  background:#fff;z-index:200;transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;padding:22px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.drawer-title{font-size:20px;font-weight:700;color:var(--c-ink)}
.drawer-close{width:38px;height:38px;border-radius:50%;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--c-muted)}
.drawer-nav{margin-top:8px;display:flex;flex-direction:column}
.drawer-nav a{padding:14px 2px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-ink);font-weight:500}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:700}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}
.drawer-age{margin-top:12px;font-size:12px;color:var(--c-muted);text-align:center}

/* ============ Article page ============ */
.article-hero{background:linear-gradient(180deg,#F6F8FB 0%,#FFFFFF 100%);border-bottom:1px solid var(--c-line);padding:34px 0 30px;position:relative;overflow:hidden}
.article-hero::after{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:rgba(43,74,111,.06);pointer-events:none;
}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:18px}
.crumbs a{color:var(--c-muted)}
.crumbs a:hover{color:var(--c-primary)}
.crumbs .divider{color:#C3CEDC}
.crumbs .current{color:var(--c-text);max-width:380px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{display:flex;gap:30px;align-items:flex-start;justify-content:space-between;position:relative;z-index:2}
.article-head-main{max-width:840px}
.article-head .badge{margin-bottom:14px}
.article-h1{font-size:clamp(26px,3.2vw,38px);line-height:1.4;margin-bottom:18px}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:0;font-size:13px;color:var(--c-muted)}
.article-meta span{padding:0 12px;position:relative}
.article-meta span:first-child{padding-left:0}
.article-meta span:not(:first-child)::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:12px;background:var(--c-line);
}
.article-head-side{
  flex-shrink:0;width:260px;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-md);box-shadow:var(--sh-1);padding:18px 20px;border-left:3px solid var(--c-primary);
}
.article-head-side h4{font-size:13px;letter-spacing:1px;color:var(--c-muted);font-weight:600;margin-bottom:10px}
.article-head-side p{font-size:13px;color:var(--c-text);line-height:1.75;margin:0}

.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;padding:52px 0 var(--sp)}
.article-body{max-width:720px;font-size:16px;line-height:1.9;color:#33445A}
.article-body h2{
  font-size:24px;margin:40px 0 16px;padding-left:14px;position:relative;color:var(--c-ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:.95em;border-radius:2px;background:var(--c-primary);
}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:19px;margin:28px 0 12px;color:var(--c-ink)}
.article-body p{margin:0 0 18px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px;line-height:1.9}
.article-body li{margin-bottom:8px}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;background:var(--c-soft);border-left:4px solid var(--c-primary);
  border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--c-text);font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:22px 0;width:100%;object-fit:cover}
.article-body a{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.article-body figure{margin:22px 0}
.article-body figcaption{font-size:13px;color:var(--c-muted);margin-top:10px;text-align:center}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 12px;text-align:left}
.article-body th{background:var(--c-soft);color:var(--c-ink)}

.keypoints{
  background:var(--c-soft);border:1px solid var(--c-line);border-left:4px solid var(--c-primary);
  border-radius:var(--r-md);padding:22px 24px;margin:0 0 32px;
}
.keypoints h3{font-size:17px;margin:0 0 12px;color:var(--c-ink)}
.keypoints ul{margin:0;padding-left:20px;font-size:15px;line-height:1.8}
.keypoints li{margin-bottom:6px}
.keypoints li:last-child{margin-bottom:0}

.sidebar{position:sticky;top:120px;display:flex;flex-direction:column;gap:22px}
.side-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);padding:20px}
.side-card h4{font-size:14px;letter-spacing:1px;color:var(--c-ink);margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--c-line)}
.toc-list{list-style:none;margin:0;padding:0;font-size:14px;line-height:1.7}
.toc-list li{margin-bottom:0}
.toc-list a{display:block;padding:8px 0 8px 12px;border-left:2px solid var(--c-line);color:var(--c-text);font-size:14px}
.toc-list a:hover{border-left-color:var(--c-primary);color:var(--c-primary);background:#F8FAFD}
.hot-list{list-style:none;margin:0;padding:0}
.hot-list li{padding:10px 0;border-bottom:1px dashed var(--c-line);margin:0}
.hot-list li:last-child{border-bottom:0;padding-bottom:0}
.hot-list a{font-size:14px;line-height:1.7;color:var(--c-text);display:block}
.hot-list a:hover{color:var(--c-primary)}
.hot-list .hot-date{display:block;font-size:12px;color:var(--c-muted);margin-top:2px}

.notfound{background:var(--c-soft);border:1px dashed #C9D7E6;border-radius:var(--r-md);padding:52px 28px;text-align:center}
.notfound h2{font-size:22px;margin-bottom:12px}
.notfound p{color:var(--c-muted);margin-bottom:22px}

/* Related */
.section{padding:var(--sp) 0}
.section--soft{background:var(--c-soft)}
.section--white{background:var(--c-surface)}
.sec-head{max-width:820px;margin-bottom:38px}
.sec-head--row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;max-width:none}
.sec-eyebrow{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--c-accent);font-weight:700;margin-bottom:10px}
.sec-title{font-size:clamp(24px,2.4vw,32px);margin-bottom:12px}
.sec-sub{font-size:15px;color:var(--c-muted);max-width:62ch;margin:0}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rel-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;transition:box-shadow .22s ease,transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s ease}
.rel-card:hover{box-shadow:var(--sh-2);transform:translateY(-3px);border-color:#CBD8E6}
.rel-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--c-soft)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}
.rel-card:hover .rel-thumb img{transform:scale(1.03)}
.rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-body h3{font-size:17px;line-height:1.6}
.rel-body h3 a{color:var(--c-ink)}
.rel-body h3 a:hover{color:var(--c-primary)}
.rel-date{font-size:12px;color:var(--c-muted)}

/* Prev next */
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:22px}
.pn-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);padding:20px 22px;box-shadow:var(--sh-1);transition:box-shadow .22s ease,border-color .22s ease}
.pn-card:hover{box-shadow:var(--sh-2);border-color:#CBD8E6}
.pn-label{font-size:12px;color:var(--c-muted);letter-spacing:1px;margin-bottom:8px;display:block}
.pn-card a{font-size:16px;font-weight:600;color:var(--c-ink);line-height:1.6;display:block}
.pn-card a:hover{color:var(--c-primary)}
.pn-links{display:flex;gap:22px;flex-wrap:wrap;font-size:14px}
.pn-links a{border-bottom:1px solid rgba(43,74,111,.35);padding-bottom:2px}

/* CTA */
.cta-band{
  background:linear-gradient(120deg,#E8EFF7 0%,#F3F7FC 100%);
  border:1px solid #D8E3EF;border-radius:var(--r-lg);padding:40px 42px;
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-band h2{font-size:clamp(21px,2.2vw,27px);margin-bottom:10px}
.cta-band p{color:var(--c-text);font-size:15px;max-width:56ch;margin:0}
.cta-band-actions{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.cta-note{font-size:12px;color:var(--c-muted);margin:0}

.disclaimer{border-top:1px solid var(--c-line);background:#FBFCFE;padding:26px 0}
.disclaimer p{font-size:12px;color:var(--c-muted);line-height:1.9;margin:0}

/* Footer */
.site-footer{background:#1B2A3D;color:#B9C6D6;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:44px}
.footer-logo{font-size:26px;font-weight:700;color:#fff;letter-spacing:-.5px}
.footer-sub{display:block;font-size:12px;letter-spacing:1px;color:#8A9BB0;margin:6px 0 14px}
.footer-brand p{font-size:13.5px;line-height:1.85;color:#9FB0C4;margin:0 0 16px;max-width:34ch}
.age-tag{display:inline-block;font-size:12px;color:#F0B49A;border:1px solid rgba(228,112,60,.45);border-radius:var(--r-pill);padding:3px 12px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:1px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13.5px;color:#9FB0C4}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12.5px;color:#7F92A8}

/* Responsive */
@media (max-width:1200px){
  .channels a{padding:0 10px;font-size:14px}
  .layout{grid-template-columns:minmax(0,1fr) 272px;gap:34px}
}
@media (max-width:1024px){
  .channels,.mast-actions{display:none}
  .burger{display:flex}
  .layout{grid-template-columns:1fr;gap:36px}
  .sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 300px}
  .rel-grid{grid-template-columns:repeat(2,1fr)}
  .article-head-side{display:none}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  :root{--sp:56px}
  .container{padding:0 18px}
  .masthead-inner{height:72px}
  .article-h1{font-size:24px}
  .article-hero{padding:24px 0 22px}
  .article-meta span{padding:0 9px;font-size:12px}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body h2{font-size:21px;margin:32px 0 14px}
  .article-body h3{font-size:18px}
  .pn-grid{grid-template-columns:1fr}
  .rel-grid{grid-template-columns:1fr}
  .cta-band{padding:28px 22px}
  .cta-band-actions{width:100%}
  .cta-band-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .cmt-avatar{width:38px;height:38px}
}
@media (max-width:520px){
  .crumbs .current{max-width:180px}
  .keypoints{padding:18px}
  .side-card{padding:16px}
  .btn{width:100%}
  .btn-sm{width:auto}
}

/* roulang page: category1 */
:root{
  --c-primary:#2B4A6F;
  --c-primary-dark:#1E3550;
  --c-accent:#E4703C;
  --c-ink:#1B2A3D;
  --c-text:#3A4A5E;
  --c-muted:#7C8BA0;
  --c-line:#E2E8F0;
  --c-bg:#F6F8FB;
  --c-surface:#FFFFFF;
  --c-soft:#EDF2F8;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(28,50,80,.06);
  --sh-2:0 6px 20px rgba(28,50,80,.08);
  --sh-3:0 16px 40px rgba(28,50,80,.12);
  --container:1200px;
  --sp:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:120px}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.85;color:var(--c-text);background:var(--c-surface);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:var(--c-primary);text-decoration:none;transition:color .3s ease}
a:hover{color:var(--c-primary-dark)}
img{display:block;max-width:100%;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
  white-space:nowrap;border:1px solid transparent;
  transition:background .22s ease,box-shadow .22s ease,transform .12s ease,color .22s ease,border-color .22s ease;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--c-primary-dark);color:#fff;box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--c-primary);color:var(--c-primary);background:transparent}
.btn-outline:hover{background:rgba(43,74,111,.08);color:var(--c-primary-dark)}
.btn-ghost{border-color:#CFDAE6;color:var(--c-text);background:transparent}
.btn-ghost:hover{border-color:var(--c-primary);color:var(--c-primary)}
.btn-sm{padding:9px 18px;font-size:14px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:var(--r-pill);
  background:#E8EFF7;color:var(--c-primary);
  font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap;
}
.badge-accent{background:rgba(228,112,60,.12);color:#B9522A}

/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:120;background:#fff;transition:box-shadow .22s ease}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(28,50,80,.08)}
.topbar{
  height:34px;background:#F2F6FA;border-bottom:1px solid var(--c-line);
  font-size:12px;color:var(--c-muted);overflow:hidden;
  transition:height .22s ease,opacity .22s ease;
}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:34px;gap:16px}
.topbar-age{display:inline-flex;align-items:center;gap:6px;color:#B9522A;font-weight:600;white-space:nowrap}
.topbar-links{display:flex;align-items:center}
.topbar-links a{color:var(--c-muted);padding:0 12px;font-size:12px}
.topbar-links a:hover{color:var(--c-primary)}
.topbar-links .sep{width:1px;height:11px;background:#D8DFE8}
.topbar-cta{color:var(--c-primary);font-weight:600;font-size:12px;white-space:nowrap}
.site-header.is-scrolled .topbar{height:0;opacity:0;border-bottom-color:transparent}
.site-header.is-scrolled .masthead-inner{height:66px}
.masthead-inner{display:flex;align-items:center;justify-content:space-between;gap:26px;height:96px;transition:height .22s ease}
.brand{display:flex;flex-direction:column;gap:2px;flex-shrink:0;line-height:1.1;padding-bottom:4px;border-bottom:1px solid var(--c-ink);color:var(--c-ink)}
.brand-mark{font-size:clamp(26px,3.2vw,40px);font-weight:700;letter-spacing:-.5px;color:var(--c-ink);transition:font-size .22s ease}
.site-header.is-scrolled .brand-mark{font-size:22px}
.brand-sub{font-size:11px;letter-spacing:2px;color:var(--c-muted);white-space:nowrap}
.channels{display:flex;align-items:center;flex-wrap:nowrap}
.channels a{position:relative;padding:0 13px;font-size:15px;color:var(--c-text);white-space:nowrap;line-height:1.6}
.channels a:not(:last-child)::after{
  content:"";position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:#D8DFE8;
}
.channels a::before{
  content:"";position:absolute;left:13px;right:13px;bottom:-4px;height:2px;
  background:var(--c-primary);transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.channels a:hover{color:var(--c-primary)}
.channels a:hover::before,.channels a.is-active::before{transform:scaleX(1)}
.channels a.is-active{color:var(--c-primary);font-weight:600}
.mast-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.burger{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--c-line);flex-direction:column;justify-content:center;align-items:center;gap:5px;flex-shrink:0}
.burger span{display:block;width:20px;height:2px;background:var(--c-ink);border-radius:2px;transition:background .2s ease}
.burger:hover{border-color:var(--c-primary)}
.burger:hover span{background:var(--c-primary)}

/* ===== drawer ===== */
.drawer-mask{position:fixed;inset:0;background:rgba(20,34,52,.45);z-index:190;opacity:0;visibility:hidden;transition:opacity .28s ease}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;width:320px;max-width:86vw;height:100%;
  background:#fff;z-index:200;transform:translateX(102%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;padding:22px 20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--c-line)}
.drawer-title{font-size:20px;font-weight:700;color:var(--c-ink)}
.drawer-close{width:38px;height:38px;border-radius:50%;border:1px solid var(--c-line);display:flex;align-items:center;justify-content:center;font-size:18px;color:var(--c-muted)}
.drawer-close:hover{border-color:var(--c-primary);color:var(--c-primary)}
.drawer-nav{margin-top:8px;display:flex;flex-direction:column}
.drawer-nav a{padding:14px 2px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-ink);font-weight:500}
.drawer-nav a.is-active{color:var(--c-primary);font-weight:700}
.drawer-foot{margin-top:auto;padding-top:22px}
.drawer-foot .btn{width:100%}
.drawer-age{margin-top:12px;font-size:12px;color:var(--c-muted);text-align:center}

/* ===== section base ===== */
.section{padding:var(--sp) 0}
.section--soft{background:var(--c-soft)}
.section--white{background:var(--c-surface)}
.sec-head{margin-bottom:40px}
.sec-eyebrow{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--c-accent);font-weight:700;margin-bottom:10px}
.sec-title{font-size:clamp(24px,2.4vw,32px);font-weight:700;letter-spacing:-.3px;color:var(--c-ink);line-height:1.35;margin-bottom:12px}
.sec-desc{max-width:62ch;font-size:16px;color:var(--c-muted);line-height:1.85}

/* ===== category hero ===== */
.cat-hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F0F5FA 0%,#F8FBFD 100%);border-bottom:1px solid var(--c-line)}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/5972bf2400e6cde6.webp') center/cover no-repeat;
  opacity:.09;pointer-events:none;
}
.cat-hero::after{
  content:"";position:absolute;right:-160px;top:-190px;width:520px;height:520px;border-radius:50%;
  background:rgba(43,74,111,.06);pointer-events:none;
}
.cat-hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;align-items:start;padding:40px 0 46px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);margin-bottom:16px;flex-wrap:wrap}
.crumb a{color:var(--c-muted)}
.crumb a:hover{color:var(--c-primary)}
.crumb .crumb-sep{color:#C3CEDA}
.crumb strong{color:var(--c-primary);font-weight:600}
.cat-title{font-size:clamp(28px,3.2vw,40px);line-height:1.3;font-weight:700;letter-spacing:-.4px;color:var(--c-ink);margin-bottom:14px}
.cat-lead{font-size:16px;line-height:1.9;color:var(--c-text);max-width:64ch;margin-bottom:10px}
.cat-lead + .cat-lead{color:var(--c-muted);font-size:15px}
.cat-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.cat-note{margin-top:14px;font-size:13px;color:var(--c-muted);line-height:1.7}
.toc-card{
  background:#fff;border:1px solid var(--c-line);border-left:3px solid var(--c-primary);
  border-radius:var(--r-md);padding:20px 22px;box-shadow:var(--sh-1);
}
.toc-card h2{font-size:15px;font-weight:700;color:var(--c-ink);margin-bottom:12px;letter-spacing:.5px}
.toc-card ol{counter-reset:toc}
.toc-card li{counter-increment:toc;display:flex;gap:10px;padding:8px 0;border-bottom:1px dashed var(--c-line);font-size:14px}
.toc-card li:last-child{border-bottom:0}
.toc-card li::before{content:counter(toc,decimal-leading-zero);color:var(--c-muted);font-size:12px;line-height:2.1;font-variant-numeric:tabular-nums}
.toc-card a{color:var(--c-text)}
.toc-card a:hover{color:var(--c-primary)}

/* ===== feature grid ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CBD8E6}
.feature-thumb{aspect-ratio:16/10;overflow:hidden;background:var(--c-soft)}
.feature-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.feature-card:hover .feature-thumb img{transform:scale(1.03)}
.feature-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.feature-body h3{font-size:18px;font-weight:700;color:var(--c-ink);letter-spacing:-.2px;line-height:1.5}
.feature-body p{font-size:14px;line-height:1.8;color:var(--c-muted)}
.feature-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:4px}
.grid-more{display:flex;justify-content:flex-end;margin-top:32px}

/* ===== meters ===== */
.meter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.meter{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);padding:22px;box-shadow:var(--sh-1)}
.meter-top{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:6px}
.meter-top h3{font-size:15px;font-weight:700;color:var(--c-ink);line-height:1.5}
.meter-val{font-size:26px;font-weight:700;color:var(--c-primary);font-variant-numeric:tabular-nums;letter-spacing:-.5px}
.meter-bar{height:6px;border-radius:var(--r-pill);background:#E4ECF5;overflow:hidden;margin:12px 0 12px}
.meter-bar i{display:block;height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,#2B4A6F,#4E739D)}
.meter p{font-size:13px;line-height:1.75;color:var(--c-muted)}

/* ===== topic cards ===== */
.topic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.topic-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CBD8E6}
.topic-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--c-soft)}
.topic-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.topic-card:hover .topic-thumb img{transform:scale(1.03)}
.topic-body{padding:18px 20px 22px}
.topic-body h3{font-size:17px;font-weight:700;color:var(--c-ink);margin-bottom:8px;line-height:1.5}
.topic-body p{font-size:14px;color:var(--c-muted);line-height:1.8}
.topic-body a{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;margin-top:12px}

/* ===== compare ===== */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.plan-card{position:relative;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-lg);padding:28px 26px 26px;box-shadow:var(--sh-1)}
.plan-card--pro{border:2px solid var(--c-primary);box-shadow:var(--sh-2)}
.plan-tag{position:absolute;top:-13px;right:24px;background:var(--c-accent);color:#fff;font-size:12px;font-weight:600;padding:4px 12px;border-radius:var(--r-pill)}
.plan-card h3{font-size:20px;font-weight:700;color:var(--c-ink);margin-bottom:4px}
.plan-price{font-size:13px;color:var(--c-muted);margin-bottom:18px}
.plan-card ul{display:block}
.plan-card li{display:flex;align-items:flex-start;gap:10px;padding:11px 0;border-bottom:1px dashed var(--c-line);font-size:15px;line-height:1.7;color:var(--c-text)}
.plan-card li:last-child{border-bottom:0}
.mark{flex-shrink:0;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;margin-top:3px}
.mark-yes{background:#E8EFF7;color:var(--c-primary)}
.mark-no{background:#F1F4F8;color:#A9B6C6}
.plan-foot{margin-top:20px;font-size:13px;color:var(--c-muted)}

/* ===== tips list ===== */
.tips-wrap{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:48px;align-items:start}
.tips-list li{display:flex;align-items:flex-start;gap:20px;padding:20px 0;border-bottom:1px solid var(--c-line)}
.tips-list li:first-child{padding-top:0}
.tips-list li:last-child{border-bottom:0}
.tip-num{font-size:36px;font-weight:700;line-height:1;color:rgba(43,74,111,.16);font-variant-numeric:tabular-nums;letter-spacing:-1px;flex-shrink:0;padding-top:2px}
.tips-list h3{font-size:17px;font-weight:700;color:var(--c-ink);margin-bottom:6px;line-height:1.55}
.tips-list p{font-size:14px;color:var(--c-muted);line-height:1.8}
.side-note{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1)}
.side-note h3{font-size:16px;font-weight:700;color:var(--c-ink);margin-bottom:10px}
.side-note p{font-size:14px;color:var(--c-muted);line-height:1.85;margin-bottom:16px}
.side-note .btn{width:100%}

/* ===== device ===== */
.device-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.device-card{display:flex;gap:16px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.device-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#CBD8E6}
.device-icon{flex-shrink:0;width:48px;height:48px;border-radius:12px;background:#E8EFF7;color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700}
.device-card h3{font-size:17px;font-weight:700;color:var(--c-ink);margin-bottom:6px}
.device-card p{font-size:14px;color:var(--c-muted);line-height:1.8}

/* ===== faq ===== */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-md);margin-bottom:12px;box-shadow:var(--sh-1);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item[open]{border-color:#CBD8E6;box-shadow:var(--sh-2)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-size:16px;font-weight:600;color:var(--c-ink);cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-ico{position:relative;flex-shrink:0;width:20px;height:20px}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);border-radius:2px;transform:translate(-50%,-50%);transition:transform .25s ease,opacity .25s ease}
.faq-ico::before{width:14px;height:2px}
.faq-ico::after{width:2px;height:14px}
.faq-item[open] .faq-ico::after{transform:translate(-50%,-50%) rotate(90deg);opacity:0}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.85;color:var(--c-muted)}
.faq-a p{max-width:70ch}

/* ===== compliance strip ===== */
.compliance{background:#E9F0F7;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.compliance-inner{display:flex;align-items:center;gap:22px;padding:34px 0}
.age-circle{flex-shrink:0;width:58px;height:58px;border-radius:50%;background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;letter-spacing:-.5px}
.compliance-text h2{font-size:17px;font-weight:700;color:var(--c-ink);margin-bottom:6px}
.compliance-text p{font-size:14px;line-height:1.8;color:var(--c-text);max-width:72ch}
.compliance-link{margin-left:auto;flex-shrink:0;font-weight:600;font-size:14px;white-space:nowrap}

/* ===== footer ===== */
.site-footer{background:#16273B;color:#C3D0DF;padding-top:64px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-logo{font-size:24px;font-weight:700;color:#fff;letter-spacing:-.5px;line-height:1.2}
.footer-sub{display:block;font-size:12px;letter-spacing:1px;color:#8FA4BC;margin:8px 0 16px}
.footer-brand p{font-size:14px;line-height:1.85;color:#9FB2C7;margin-bottom:18px;max-width:42ch}
.age-tag{display:inline-block;font-size:12px;border:1px solid rgba(255,255,255,.22);border-radius:var(--r-pill);padding:4px 12px;color:#DCE6F0}
.footer-col h4{font-size:15px;color:#fff;margin:0 0 16px;font-weight:600}
.footer-col li + li{margin-top:10px}
.footer-col a{font-size:14px;color:#9FB2C7}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0 22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:#7F94AC}

/* ===== responsive ===== */
@media (max-width:1180px){
  .masthead-inner{height:86px;gap:16px}
  .channels,.mast-actions{display:none}
  .burger{display:flex}
  .cat-hero-inner{grid-template-columns:1fr;gap:28px}
  .toc-card{max-width:420px}
}
@media (max-width:992px){
  :root{--sp:64px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .meter-grid{grid-template-columns:repeat(2,1fr)}
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .device-grid{grid-template-columns:1fr}
  .compare{grid-template-columns:1fr}
  .tips-wrap{grid-template-columns:1fr;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  :root{--sp:56px}
  .topbar-links{display:none}
  .masthead-inner{height:72px}
  .site-header.is-scrolled .masthead-inner{height:62px}
  .brand-mark{font-size:26px}
  .cat-hero-inner{padding:30px 0 36px}
  .cat-actions .btn{flex:1 1 auto}
  .sec-head{margin-bottom:28px}
  .feature-grid{grid-template-columns:1fr;gap:18px}
  .meter-grid{grid-template-columns:1fr;gap:16px}
  .topic-grid{grid-template-columns:1fr;gap:18px}
  .compliance-inner{flex-wrap:wrap;gap:16px;padding:28px 0}
  .compliance-link{margin-left:0;width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .faq-item summary{padding:16px 18px;font-size:15px}
  .faq-a{padding:0 18px 18px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .cat-title{font-size:26px}
  .cat-actions .btn{width:100%}
  .btn{padding:12px 20px}
  .tip-num{font-size:30px}
  .footer-bottom{flex-direction:column;gap:8px}
}