/* roulang page: index */
:root{
  --bg:#0B0E13;
  --bg-2:#12161D;
  --card:#161C25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#FF5A2D;
  --primary-2:#FFB020;
  --accent:#16E0C0;
  --warn:#FFB020;
  --danger:#FF4D6D;
  --txt:#F5F7FA;
  --txt-2:#A8B3C0;
  --txt-3:#6D7885;
  --r-card:16px;
  --r-sm:12px;
  --r-img:14px;
  --r-btn:10px;
  --sh-btn:0 8px 24px rgba(255,90,45,.28);
  --sh-card:0 12px 32px rgba(0,0,0,.45);
  --grad:linear-gradient(135deg,#FF5A2D 0%,#FFB020 100%);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background-color:var(--bg);
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:48px 48px;
  color:var(--txt);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC','Source Han Sans',system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(255,90,45,.35);}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 32px;
}
.section{padding:96px 0;}
.section-tight{padding:64px 0;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,14,19,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.brand-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:72px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:var(--grad);
  display:grid;place-items:center;
  font-weight:900;font-size:17px;color:#0B0E13;
  box-shadow:0 6px 18px rgba(255,90,45,.32);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1;}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.02em;}
.brand-sub{font-size:11px;color:var(--txt-3);letter-spacing:.14em;margin-top:2px;}
.header-actions{display:flex;align-items:center;gap:12px;}
.header-link{
  display:none;
  font-size:14px;color:var(--txt-2);
  padding:8px 12px;border-radius:8px;
  transition:color .2s,background .2s;
}
.header-link:hover{color:var(--primary);background:rgba(255,90,45,.10);}
.header-cta{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 16px;border-radius:var(--r-btn);
  background:var(--grad);color:#0B0E13;
  font-size:14px;font-weight:700;
  transition:transform .2s,box-shadow .2s;
}
.header-cta:hover{transform:translateY(-2px);box-shadow:var(--sh-btn);}
.channel-row{
  display:flex;align-items:center;gap:6px;
  height:52px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channel-row::-webkit-scrollbar{display:none;}
.channel{
  position:relative;
  flex:0 0 auto;
  padding:8px 14px;
  border-radius:8px;
  font-size:15px;
  color:var(--txt-2);
  transition:color .2s,background .2s;
  white-space:nowrap;
}
.channel:hover{color:var(--primary);background:rgba(255,90,45,.10);}
.channel.active{color:var(--primary);font-weight:700;}
.channel.active::after{
  content:"";
  position:absolute;left:14px;right:14px;bottom:2px;
  height:2px;border-radius:2px;background:var(--primary);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:700;
  transition:transform .2s,box-shadow .2s,border-color .2s,background .2s,color .2s;
}
.btn-primary{background:var(--grad);color:#0B0E13;}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-btn);}
.btn-ghost{
  background:transparent;
  border:1px solid var(--line-strong);
  color:var(--txt);
}
.btn-ghost:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent);}
.btn-text{
  color:var(--primary);font-weight:700;font-size:15px;
  text-underline-offset:5px;text-decoration:underline;
}
.btn:active{transform:scale(.98);}
.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(180deg,rgba(11,14,19,.72) 0%,rgba(11,14,19,.94) 78%,var(--bg) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:56px;
  align-items:center;
  padding-top:84px;
  padding-bottom:84px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:100px;
  border:1px solid rgba(22,224,192,.4);
  color:var(--accent);
  font-size:13px;letter-spacing:.06em;
  margin-bottom:22px;
}
.eyebrow::before{content:"";width:6px;height:6px;background:var(--accent);border-radius:2px;}
.hero h1{
  font-size:clamp(30px,4vw,50px);
  line-height:1.16;
  font-weight:900;
  letter-spacing:-.01em;
}
.hero h1 .hl{
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-sub{
  margin-top:20px;
  font-size:17px;
  color:var(--txt-2);
  max-width:600px;
}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.trust{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:30px;
}
.trust li{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;
  border-radius:100px;
  border:1px solid rgba(22,224,192,.28);
  background:rgba(22,224,192,.06);
  font-size:13px;
  color:var(--txt-2);
  font-variant-numeric:tabular-nums;
}
.trust b{color:var(--accent);font-weight:700;}

.hero-media{position:relative;height:540px;}
.phone{
  position:absolute;
  width:212px;
  aspect-ratio:9/19;
  border-radius:26px;
  border:1px solid rgba(255,255,255,.14);
  background:var(--card);
  overflow:hidden;
  box-shadow:0 20px 46px rgba(0,0,0,.6);
}
.phone img{width:100%;height:100%;object-fit:cover;}
.phone::before{
  content:"";
  position:absolute;top:10px;left:50%;transform:translateX(-50%);
  width:58px;height:6px;border-radius:6px;
  background:rgba(255,255,255,.22);
  z-index:2;
}
.phone.p1{left:2%;top:58px;transform:rotate(-6deg);z-index:1;opacity:.9;}
.phone.p2{left:50%;margin-left:-114px;top:0;z-index:3;width:228px;}
.phone.p3{right:0;top:74px;transform:rotate(6deg);z-index:2;opacity:.9;}
.hero-note{
  position:absolute;
  left:4%;right:4%;bottom:0;
  z-index:4;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 18px;
  border-radius:var(--r-sm);
  border:1px solid var(--line-strong);
  background:rgba(18,22,29,.92);
  font-size:13px;color:var(--txt-2);
  font-variant-numeric:tabular-nums;
}
.hero-note strong{color:var(--txt);font-size:14px;}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.stat{
  background:var(--bg-2);
  padding:26px 24px;
}
.stat-num{
  font-size:30px;font-weight:900;line-height:1.2;
  font-variant-numeric:tabular-nums;
  color:var(--primary);
}
.stat-num span{font-size:15px;color:var(--txt-3);font-weight:600;margin-left:4px;}
.stat-label{font-size:14px;color:var(--txt-2);margin-top:6px;}

/* ---------- 板块标题 ---------- */
.section-head{margin-bottom:36px;}
.section-head h2{
  position:relative;
  font-size:clamp(23px,2.6vw,32px);
  font-weight:800;
  line-height:1.28;
  padding-left:18px;
}
.section-head h2::before{
  content:"";
  position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:5px;height:22px;border-radius:3px;background:var(--primary);
}
.section-head p{margin-top:12px;font-size:16px;color:var(--txt-2);max-width:760px;}
.section-head-row{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:36px;
}
.link-more{color:var(--primary);font-weight:700;font-size:15px;white-space:nowrap;}
.link-more:hover{text-decoration:underline;text-underline-offset:5px;}

/* ---------- 功能价值区 ---------- */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.f-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:26px;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.f-card:hover{transform:translateY(-4px);border-color:rgba(255,90,45,.35);box-shadow:var(--sh-card);}
.f-card.wide{
  grid-column:span 2;
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:24px;
  align-items:center;
}
.f-icon{
  width:44px;height:44px;border-radius:12px;
  display:grid;place-items:center;
  border:1px solid rgba(22,224,192,.35);
  background:rgba(22,224,192,.08);
  color:var(--accent);
  margin-bottom:16px;
}
.f-card h3{font-size:19px;font-weight:700;margin-bottom:8px;}
.f-card p{font-size:15px;color:var(--txt-2);line-height:1.8;}
.f-media{
  border-radius:var(--r-img);
  overflow:hidden;
  aspect-ratio:16/10;
  background:linear-gradient(135deg,rgba(255,90,45,.14),rgba(22,224,192,.10));
}
.f-media img{width:100%;height:100%;object-fit:cover;}
.tag{
  display:inline-block;
  padding:4px 10px;border-radius:100px;
  font-size:12px;font-weight:700;letter-spacing:.03em;
}
.tag-flame{background:rgba(255,90,45,.16);color:#FF8A62;border:1px solid rgba(255,90,45,.35);}
.tag-mint{background:rgba(22,224,192,.14);color:var(--accent);border:1px solid rgba(22,224,192,.3);}
.tag-gray{background:rgba(255,255,255,.06);color:var(--txt-2);border:1px solid var(--line);}

/* ---------- 截图轮播 ---------- */
.carousel-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;
  margin-bottom:28px;
}
.car-btns{display:flex;gap:10px;}
.car-btn{
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line-strong);
  display:grid;place-items:center;
  color:var(--txt-2);
  transition:border-color .2s,color .2s,transform .2s,background .2s;
}
.car-btn:hover{border-color:var(--accent);color:var(--accent);background:rgba(22,224,192,.08);transform:translateY(-2px);}
.car-track{
  display:flex;
  gap:20px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-bottom:14px;
  scrollbar-width:none;
}
.car-track::-webkit-scrollbar{display:none;}
.car-item{
  flex:0 0 calc((100% - 40px)/3.2);
  scroll-snap-align:start;
}
.car-shot{
  aspect-ratio:9/16;
  border-radius:20px;
  border:1px solid rgba(255,255,255,.12);
  overflow:hidden;
  position:relative;
  background:var(--card);
}
.car-shot::before{
  content:"";
  position:absolute;top:9px;left:50%;transform:translateX(-50%);
  width:48px;height:5px;border-radius:5px;background:rgba(255,255,255,.2);z-index:2;
}
.car-shot img{width:100%;height:100%;object-fit:cover;}
.car-item p{margin-top:12px;font-size:13px;color:var(--txt-2);text-align:center;}
.car-dots{display:flex;justify-content:center;gap:8px;margin-top:18px;}
.dot{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.18);transition:background .2s,width .2s;}
.dot.on{background:var(--primary);width:22px;border-radius:4px;}

/* ---------- 系统要求 ---------- */
.segmented{
  display:inline-flex;
  padding:5px;
  gap:4px;
  border-radius:14px;
  border:1px solid var(--line);
  background:var(--bg-2);
}
.seg{
  padding:9px 22px;
  border-radius:10px;
  font-size:15px;font-weight:700;
  color:var(--txt-2);
  transition:background .2s,color .2s;
}
.seg:hover{color:var(--txt);}
.seg.on{background:var(--grad);color:#0B0E13;}
.spec-panel{display:none;margin-top:26px;}
.spec-panel.on{display:block;}
.spec-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
.spec-card{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--card);
  overflow:hidden;
}
.spec-card h3{
  font-size:16px;font-weight:700;
  padding:18px 22px;
  border-bottom:1px solid var(--line);
  display:flex;align-items:center;gap:10px;
}
.spec-row{
  display:grid;
  grid-template-columns:130px 1fr;
  gap:16px;
  align-items:center;
  padding:13px 22px;
  border-bottom:1px solid var(--line);
  font-size:15px;
  min-height:48px;
  transition:background .2s;
}
.spec-row:last-child{border-bottom:0;}
.spec-row:hover{background:rgba(255,255,255,.03);}
.spec-row dt{color:var(--txt-3);font-size:14px;}
.spec-row dd{margin:0;color:var(--txt-2);font-variant-numeric:tabular-nums;}

/* ---------- 评价墙 ---------- */
.rating-brief{
  display:flex;align-items:center;gap:16px;
  padding:16px 22px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--bg-2);
}
.rating-score{font-size:38px;font-weight:900;color:var(--primary);line-height:1;font-variant-numeric:tabular-nums;}
.stars{color:var(--primary-2);font-size:15px;letter-spacing:2px;}
.rating-brief small{display:block;color:var(--txt-3);font-size:13px;}
.review-wall{columns:3;column-gap:20px;margin-top:30px;}
.review{
  break-inside:avoid;
  margin-bottom:20px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:22px;
  transition:border-color .25s,transform .25s;
}
.review:hover{border-color:rgba(22,224,192,.35);transform:translateY(-3px);}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.avatar{
  width:38px;height:38px;border-radius:50%;
  background:var(--grad);
  display:grid;place-items:center;
  font-weight:800;color:#0B0E13;font-size:15px;
  flex-shrink:0;
}
.review-name{font-size:15px;font-weight:700;}
.review-meta{font-size:12px;color:var(--txt-3);font-variant-numeric:tabular-nums;}
.review p{font-size:15px;color:var(--txt-2);line-height:1.8;}
.review-foot{margin-top:14px;display:flex;gap:8px;flex-wrap:wrap;}

/* ---------- 最新信息 ---------- */
.news-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px;
}
.news-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .25s,border-color .25s,box-shadow .25s;
}
.news-card:hover{transform:translateY(-5px);border-color:rgba(255,90,45,.35);box-shadow:var(--sh-card);}
.news-cover{
  aspect-ratio:16/9;
  overflow:hidden;
  background:linear-gradient(135deg,rgba(255,90,45,.14),rgba(22,224,192,.1));
}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s;}
.news-card:hover .news-cover img{transform:scale(1.04);}
.news-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{
  font-size:18px;
  font-weight:700;
  line-height:1.5;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-card:hover .news-title{color:var(--primary);}
.news-sum{
  font-size:14px;color:var(--txt-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--txt-3);
  font-variant-numeric:tabular-nums;
}
.news-foot span.read{color:var(--primary);font-weight:700;}
.empty-state{
  grid-column:1/-1;
  padding:52px 24px;
  text-align:center;
  border:1px dashed var(--line-strong);
  border-radius:var(--r-card);
  background:rgba(255,255,255,.02);
  color:var(--txt-2);
}
.empty-state .ico{
  width:46px;height:46px;margin:0 auto 14px;
  border-radius:12px;border:1px solid var(--line-strong);
  display:grid;place-items:center;color:var(--txt-3);
}
.empty-state a{display:inline-block;margin-top:10px;color:var(--primary);font-weight:700;}

/* ---------- 大 CTA ---------- */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:22px;
  border:1px solid rgba(255,90,45,.3);
  background:
    linear-gradient(115deg,rgba(255,90,45,.22) 0%,rgba(255,176,32,.10) 42%,rgba(11,14,19,.2) 100%),
    var(--bg-2);
  padding:52px 48px;
}
.cta-band::after{
  content:"";
  position:absolute;right:-60px;top:-60px;
  width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,45,.35),transparent 68%);
}
.cta-grid{
  position:relative;z-index:2;
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:36px;
  align-items:center;
}
.cta-grid h2{font-size:clamp(22px,2.6vw,32px);font-weight:800;line-height:1.3;}
.cta-grid p{margin-top:14px;color:var(--txt-2);font-size:16px;}
.cta-side{display:flex;flex-direction:column;gap:14px;}
.cta-btns{display:flex;flex-wrap:wrap;gap:12px;}
.qr-box{
  display:flex;align-items:center;gap:14px;
  padding:14px 18px;
  border-radius:var(--r-sm);
  border:1px dashed var(--line-strong);
  background:rgba(11,14,19,.55);
}
.qr-img{
  width:76px;height:76px;border-radius:10px;
  overflow:hidden;flex-shrink:0;
  background:rgba(255,90,45,.12);
  border:1px solid var(--line);
}
.qr-img img{width:100%;height:100%;object-fit:cover;}
.qr-box strong{display:block;font-size:15px;margin-bottom:4px;}
.qr-box small{color:var(--txt-3);font-size:13px;line-height:1.6;}
.cta-tip{
  margin-top:22px;font-size:13px;color:var(--txt-3);
  border-top:1px solid var(--line);padding-top:16px;
}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--card);
  overflow:hidden;
  transition:border-color .25s;
}
.faq-item[open]{border-color:rgba(255,90,45,.4);}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:18px 22px 18px 24px;
  font-size:16px;font-weight:700;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  transition:color .2s,background .2s;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--primary);background:rgba(255,90,45,.05);}
.faq-item[open] summary{color:var(--primary);}
.faq-item summary::after{
  content:"+";
  font-size:20px;font-weight:700;color:var(--txt-3);
  flex-shrink:0;transition:transform .25s,color .25s;
}
.faq-item[open] summary::after{content:"–";color:var(--primary);}
.faq-body{padding:0 24px 20px;position:relative;}
.faq-body::before{
  content:"";position:absolute;left:0;top:2px;bottom:22px;
  width:3px;border-radius:3px;background:var(--primary);
}
.faq-body p{padding-left:16px;color:var(--txt-2);font-size:15px;line-height:1.9;}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-2);
  padding:64px 0 28px;
  margin-top:20px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-brand .brand-mark{width:32px;height:32px;font-size:15px;border-radius:9px;}
.footer-brand span{font-size:17px;font-weight:800;}
.footer-grid p{font-size:14px;color:var(--txt-2);line-height:1.85;}
.footer-title{font-size:14px;font-weight:700;color:var(--txt);margin-bottom:16px;letter-spacing:.04em;}
.footer-links{display:flex;flex-direction:column;gap:11px;}
.footer-links a{font-size:14px;color:var(--txt-2);transition:color .2s;}
.footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--txt-3);
}

/* ---------- 移动端底部条 ---------- */
.mobile-bar{
  position:fixed;
  left:12px;right:12px;bottom:12px;
  z-index:70;
  display:none;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:16px;
  border:1px solid var(--line-strong);
  background:rgba(18,22,29,.96);
  box-shadow:0 16px 40px rgba(0,0,0,.6);
  transform:translateY(140%);
  transition:transform .3s;
}
.mobile-bar.show{transform:translateY(0);}
.mobile-bar .btn{flex:1;padding:11px 14px;font-size:14px;}
.mobile-bar .close{
  width:34px;height:34px;border-radius:10px;
  border:1px solid var(--line);
  display:grid;place-items:center;color:var(--txt-3);flex-shrink:0;
}
.mobile-bar .close:hover{color:var(--primary);border-color:rgba(255,90,45,.4);}

/* ---------- 响应式 ---------- */
@media(min-width:900px){
  .header-link{display:inline-flex;}
}
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:44px;}
  .hero-media{height:420px;max-width:520px;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .f-card.wide{grid-column:span 2;grid-template-columns:1fr;}
  .news-grid{grid-template-columns:repeat(2,1fr);}
  .review-wall{columns:2;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cta-grid{grid-template-columns:1fr;}
  .spec-grid{grid-template-columns:1fr;}
  .stat-strip{grid-template-columns:repeat(2,1fr);}
}
@media(max-width:640px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .section-tight{padding:44px 0;}
  .brand-name{font-size:17px;}
  .brand-sub{font-size:10px;}
  .hero-grid{padding-top:52px;padding-bottom:56px;}
  .hero-media{height:auto;display:grid;grid-template-columns:1fr 1fr;gap:12px;max-width:none;}
  .phone{position:static;width:auto;transform:none!important;aspect-ratio:9/16;opacity:1;}
  .phone.p2{width:auto;margin-left:0;}
  .phone.p3{display:none;}
  .hero-note{position:static;margin-top:14px;left:auto;right:auto;bottom:auto;}
  .feature-grid{grid-template-columns:1fr;}
  .f-card.wide{grid-column:span 1;}
  .car-item{flex:0 0 76%;}
  .news-grid{grid-template-columns:1fr;}
  .review-wall{columns:1;}
  .stat-strip{grid-template-columns:1fr;}
  .cta-band{padding:34px 24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .section-head-row{flex-direction:column;align-items:flex-start;}
  .mobile-bar{display:flex;}
  body{padding-bottom:86px;}
  .spec-row{grid-template-columns:96px 1fr;}
}

/* roulang page: article */
:root{
  --bg:#0B0E13;
  --bg-2:#12161D;
  --card:#161C25;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#FF5A2D;
  --primary-2:#FFB020;
  --mint:#16E0C0;
  --warn:#FFB020;
  --danger:#FF4D6D;
  --text:#F5F7FA;
  --text-2:#A8B3C0;
  --text-3:#6D7885;
  --radius:16px;
  --radius-sm:12px;
  --radius-xs:10px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --shadow-glow:0 8px 24px rgba(255,90,45,.28);
  --grad:linear-gradient(135deg,#FF5A2D 0%,#FFB020 100%);
}
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:150px;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC','Source Han Sans',sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:48px 48px;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .2s ease,opacity .2s ease;}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:6px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;position:relative;z-index:1;}
@media (min-width:1024px){ .container{padding:0 32px;} }

/* ============ header ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(11,14,19,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:70px;
}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:40px;height:40px;
  display:grid;place-items:center;
  border-radius:11px;
  background:var(--grad);
  color:#0B0E13;
  font-weight:900;
  font-size:19px;
  letter-spacing:-.02em;
  box-shadow:0 6px 18px rgba(255,90,45,.3);
  flex:none;
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:18px;font-weight:800;letter-spacing:.01em;color:var(--text);}
.brand-sub{font-size:10.5px;letter-spacing:.16em;color:var(--mint);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:10px;}
.header-link{
  font-size:14.5px;color:var(--text-2);padding:8px 10px;border-radius:8px;
}
.header-link:hover{color:var(--primary);background:rgba(255,90,45,.1);}
.header-cta{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--grad);
  color:#0B0E13;
  font-weight:800;
  font-size:14px;
  padding:10px 16px;
  border-radius:var(--radius-xs);
  transition:transform .2s ease,box-shadow .2s ease;
}
.header-cta:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow);}
.header-cta:active{transform:scale(.98);}
@media (max-width:767px){ .header-link{display:none;} }

.channel-row{
  display:flex;
  align-items:center;
  gap:6px;
  overflow-x:auto;
  border-top:1px solid var(--line);
  min-height:50px;
  scrollbar-width:none;
  -webkit-overflow-scrolling:touch;
}
.channel-row::-webkit-scrollbar{display:none;}
.channel{
  position:relative;
  white-space:nowrap;
  font-size:14.5px;
  color:var(--text-2);
  padding:14px 12px;
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.channel:hover{color:var(--primary);background:rgba(255,90,45,.1);}
.channel.active{color:var(--primary);font-weight:700;}
.channel.active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;background:var(--primary);
}

/* ============ article hero ============ */
.article-hero{
  position:relative;
  padding:34px 0 40px;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(11,14,19,.72) 0%,rgba(11,14,19,.94) 58%,#0B0E13 100%),url('/assets/images/backpic/back-3.webp');
  background-size:cover;
  background-position:center;
  overflow:hidden;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--text-3);letter-spacing:.02em;margin-bottom:20px;
}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{color:var(--text-3);opacity:.7;}
.breadcrumb .current{
  color:var(--text-2);
  max-width:340px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.article-badge{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
  color:var(--mint);
  border:1px solid rgba(22,224,192,.4);
  background:rgba(22,224,192,.08);
  padding:5px 12px;border-radius:999px;margin-bottom:16px;
}
.article-hero h1{
  font-size:clamp(26px,4.2vw,44px);
  line-height:1.22;
  font-weight:900;
  letter-spacing:-.01em;
  max-width:940px;
}
.article-hero h1 em{font-style:normal;color:var(--primary);}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;
  margin-top:20px;font-size:13.5px;color:var(--text-3);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6;}
.meta-chip{
  display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--line-strong);
  padding:4px 11px;border-radius:999px;color:var(--text-2);font-size:13px;
}
.copy-btn{
  display:inline-flex;align-items:center;gap:6px;
  border:1px solid var(--line-strong);
  padding:5px 12px;border-radius:999px;
  font-size:13px;color:var(--text-2);
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.copy-btn:hover{border-color:var(--mint);color:var(--mint);transform:translateY(-1px);}
.copy-btn:active{transform:scale(.97);}

/* ============ layout ============ */
.page-grid{
  display:grid;
  grid-template-columns:minmax(0,760px);
  gap:48px;
  justify-content:center;
  padding:52px 0 84px;
}
@media (min-width:1024px){
  .page-grid{grid-template-columns:minmax(0,760px) 316px;justify-content:space-between;padding:64px 0 96px;}
}
.article-body{max-width:760px;}
.article-body p{font-size:16.5px;line-height:1.92;color:var(--text-2);margin:0 0 20px;}
.article-body h2{
  position:relative;
  font-size:clamp(21px,2.4vw,28px);
  font-weight:800;
  color:var(--text);
  line-height:1.35;
  margin:42px 0 16px;
  padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;width:4px;height:20px;border-radius:2px;background:var(--primary);
}
.article-body h3{font-size:20px;font-weight:700;color:var(--text);margin:28px 0 12px;}
.article-body h4{font-size:17px;font-weight:700;color:var(--text);margin:22px 0 10px;}
.article-body ul,.article-body ol{margin:0 0 20px;padding:0;}
.article-body ul li{
  position:relative;padding-left:20px;margin-bottom:10px;
  font-size:16.5px;line-height:1.85;color:var(--text-2);
}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.7em;width:8px;height:8px;background:var(--primary);border-radius:2px;
}
.article-body ol{counter-reset:step;}
.article-body ol li{
  position:relative;padding-left:32px;margin-bottom:12px;font-size:16.5px;line-height:1.85;color:var(--text-2);counter-increment:step;
}
.article-body ol li::before{
  content:counter(step);
  position:absolute;left:0;top:.18em;width:22px;height:22px;border-radius:7px;
  background:rgba(255,90,45,.14);color:var(--primary);
  font-size:12.5px;font-weight:800;display:grid;place-items:center;
}
.article-body blockquote{
  border-left:3px solid var(--primary);
  background:rgba(255,90,45,.06);
  padding:16px 20px;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  margin:24px 0;
  color:var(--text-2);
  font-size:16px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;}
.article-body a:hover{color:var(--primary-2);}
.article-body img{border-radius:var(--radius-sm);margin:22px 0;width:100%;height:auto;background:rgba(255,90,45,.08);}
.article-body strong{color:var(--text);}
.article-body code{
  background:#1B222C;color:var(--mint);padding:2px 7px;border-radius:6px;font-size:14px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  background:#1B222C;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px;overflow-x:auto;margin:22px 0;line-height:1.7;
}
.article-body pre code{background:none;padding:0;}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left;color:var(--text-2);}
.article-body th{color:var(--text);font-weight:700;background:rgba(255,255,255,.03);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}

/* promo bar inside article */
.promo-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
  background:linear-gradient(135deg,rgba(255,90,45,.14),rgba(22,224,192,.08));
  border:1px solid rgba(255,90,45,.28);
  border-radius:var(--radius);
  padding:20px 22px;
  margin:28px 0;
}
.promo-bar .promo-title{font-size:17px;font-weight:800;color:var(--text);margin-bottom:4px;}
.promo-bar .promo-desc{font-size:14px;color:var(--text-2);line-height:1.7;}
.promo-actions{display:flex;flex-wrap:wrap;gap:10px;}

.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--grad);color:#0B0E13;
  font-weight:800;font-size:14.5px;
  padding:12px 20px;border-radius:var(--radius-xs);
  transition:transform .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-glow);filter:brightness(1.05);}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid var(--line-strong);color:var(--text);
  font-weight:600;font-size:14.5px;
  padding:11px 19px;border-radius:var(--radius-xs);
  transition:border-color .2s ease,color .2s ease,transform .2s ease,background .2s ease;
}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint);transform:translateY(-2px);background:rgba(22,224,192,.06);}
.btn-ghost:active{transform:scale(.98);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--primary);font-weight:700;font-size:14.5px;
  border-bottom:1px solid rgba(255,90,45,.5);
  padding-bottom:2px;
}
.btn-text:hover{color:var(--primary-2);border-color:var(--primary-2);}

.empty-state{
  border:1px dashed var(--line-strong);
  border-radius:var(--radius);
  background:var(--card);
  padding:56px 28px;
  text-align:center;
}
.empty-state h2{font-size:22px;font-weight:800;margin-bottom:10px;}
.empty-state p{color:var(--text-2);font-size:15px;max-width:520px;margin:0 auto 22px;}

/* ============ sidebar ============ */
.side-col{display:flex;flex-direction:column;gap:18px;}
@media (min-width:1024px){
  .side-col{position:sticky;top:148px;align-self:start;}
}
.side-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.side-card:hover{border-color:rgba(255,90,45,.35);box-shadow:var(--shadow-card);}
.side-title{
  display:flex;align-items:center;gap:8px;
  font-size:15px;font-weight:800;color:var(--text);margin-bottom:14px;
}
.side-title::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--primary);}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow:auto;}
.toc-list::-webkit-scrollbar{width:4px;}
.toc-list::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14);border-radius:4px;}
.toc-link{
  font-size:14px;color:var(--text-2);line-height:1.6;
  padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  display:block;
}
.toc-link.toc-h3{padding-left:22px;font-size:13px;color:var(--text-3);}
.toc-link:hover{color:var(--primary);background:rgba(255,90,45,.08);}
.toc-link.active{color:var(--primary);border-left-color:var(--primary);background:rgba(255,90,45,.1);font-weight:700;}
.side-download{
  background:linear-gradient(150deg,rgba(255,90,45,.16),rgba(22,224,192,.08)),var(--card);
  border:1px solid rgba(255,90,45,.3);
}
.side-download p{font-size:13.5px;color:var(--text-2);line-height:1.7;margin-bottom:14px;}
.side-download .btn-primary{width:100%;}
.version-line{
  display:flex;justify-content:space-between;font-size:12.5px;color:var(--text-3);
  margin-top:12px;letter-spacing:.02em;
}
.version-line b{color:var(--mint);font-weight:700;font-family:ui-monospace,Menlo,Consolas,monospace;}
.side-list{display:flex;flex-direction:column;}
.side-list a{
  display:block;padding:11px 0;border-bottom:1px dashed var(--line);
  font-size:14.5px;color:var(--text-2);line-height:1.6;
}
.side-list a:last-child{border-bottom:0;}
.side-list a:hover{color:var(--primary);}
.side-list span{display:block;font-size:12.5px;color:var(--text-3);margin-top:4px;}

/* ============ faq ============ */
.section{padding:64px 0;}
@media (min-width:1024px){ .section{padding:88px 0;} }
.section-head{margin-bottom:28px;}
.section-head h2{
  position:relative;font-size:clamp(22px,2.6vw,30px);font-weight:800;padding-left:16px;line-height:1.3;
}
.section-head h2::before{content:"";position:absolute;left:0;top:.32em;width:4px;height:22px;border-radius:2px;background:var(--primary);}
.section-head p{margin-top:10px;color:var(--text-2);font-size:15px;}
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--card);
  overflow:hidden;transition:border-color .25s ease;
}
.faq-item[open]{border-color:rgba(255,90,45,.4);}
.faq-item summary{
  list-style:none;cursor:pointer;padding:17px 20px 17px 22px;
  font-size:16px;font-weight:700;color:var(--text);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  position:relative;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:transparent;
}
.faq-item[open] summary{color:var(--primary);}
.faq-item[open] summary::before{background:var(--primary);}
.faq-item summary .chev{
  width:22px;height:22px;flex:none;border-radius:50%;
  border:1px solid var(--line-strong);display:grid;place-items:center;
  transition:transform .25s ease,border-color .25s ease;
}
.faq-item[open] summary .chev{transform:rotate(180deg);border-color:var(--primary);}
.faq-answer{padding:0 22px 20px;color:var(--text-2);font-size:15px;line-height:1.85;}

/* ============ related ============ */
.related-grid{display:grid;gap:20px;grid-template-columns:1fr;}
@media (min-width:640px){ .related-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .related-grid{grid-template-columns:repeat(3,1fr);} }
.post-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(255,90,45,.35);}
.post-card .thumb{position:relative;aspect-ratio:16/9;background:rgba(255,90,45,.08);overflow:hidden;}
.post-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.post-card:hover .thumb img{transform:scale(1.05);}
.post-card .thumb .badge{
  position:absolute;left:12px;top:12px;
  font-size:12px;font-weight:700;color:#0B0E13;
  background:var(--grad);padding:4px 10px;border-radius:999px;
}
.post-card .body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1;}
.post-card .body h3{font-size:17.5px;font-weight:700;line-height:1.5;color:var(--text);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card:hover .body h3{color:var(--primary);}
.post-card .body p{font-size:14px;color:var(--text-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-card .meta{margin-top:auto;display:flex;justify-content:space-between;font-size:12.5px;color:var(--text-3);}

/* ============ CTA band ============ */
.cta-band{
  position:relative;
  border:1px solid rgba(255,90,45,.3);
  border-radius:20px;
  overflow:hidden;
  padding:38px 28px;
  background-image:linear-gradient(120deg,rgba(11,14,19,.86),rgba(11,14,19,.94)),url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between;
}
.cta-band h2{font-size:clamp(21px,2.5vw,28px);font-weight:900;line-height:1.3;}
.cta-band p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:560px;line-height:1.8;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-note{margin-top:18px;font-size:13px;color:var(--text-3);width:100%;}

/* ============ footer ============ */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-2);
  padding:56px 0 28px;
  margin-top:20px;
}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr;}
@media (min-width:640px){ .footer-grid{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1024px){ .footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;} }
.footer-brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;font-size:16px;border-radius:10px;}
.site-footer p{font-size:14px;color:var(--text-2);line-height:1.85;max-width:400px;}
.footer-title{font-size:14.5px;font-weight:800;color:var(--text);margin-bottom:14px;letter-spacing:.02em;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-links a{font-size:14px;color:var(--text-2);}
.footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}

/* ============ mobile download bar ============ */
.mobile-bar{
  position:fixed;left:12px;right:12px;bottom:12px;z-index:70;
  display:none;align-items:center;gap:10px;
  background:rgba(18,22,29,.96);
  border:1px solid rgba(255,90,45,.35);
  border-radius:14px;
  padding:10px 12px;
  box-shadow:0 14px 34px rgba(0,0,0,.5);
  transform:translateY(140%);
  transition:transform .32s ease;
}
.mobile-bar.show{transform:translateY(0);}
.mobile-bar .mb-text{flex:1;min-width:0;}
.mobile-bar .mb-text b{display:block;font-size:13.5px;color:var(--text);font-weight:800;}
.mobile-bar .mb-text span{font-size:11.5px;color:var(--text-3);}
.mobile-bar .btn-primary{padding:10px 14px;font-size:13.5px;}
.mobile-bar .mb-close{
  width:26px;height:26px;flex:none;border-radius:50%;
  border:1px solid var(--line-strong);color:var(--text-3);
  display:grid;place-items:center;font-size:14px;line-height:1;
}
.mobile-bar .mb-close:hover{color:var(--primary);border-color:var(--primary);}
@media (max-width:1023px){
  .mobile-bar{display:flex;}
  body{padding-bottom:86px;}
}

/* roulang page: category1 */
:root{
  --bg:#0B0E13;
  --bg-2:#12161D;
  --card:#161C25;
  --card-2:#1B222C;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --primary:#FF5A2D;
  --primary-2:#FFB020;
  --accent:#16E0C0;
  --text:#F5F7FA;
  --text-2:#A8B3C0;
  --text-3:#6D7885;
  --danger:#FF4D6D;
  --radius:16px;
  --radius-sm:12px;
  --shadow-card:0 12px 32px rgba(0,0,0,.45);
  --glow:0 8px 24px rgba(255,90,45,.28);
  --grad:linear-gradient(135deg,#FF5A2D 0%,#FFB020 100%);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text-2);
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,sans-serif;
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.022) 1px,transparent 1px);
  background-size:52px 52px;
}
main,.site-header,.site-footer{position:relative;z-index:1}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--text);line-height:1.25}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
::selection{background:rgba(255,90,45,.35);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ============ 头部 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:rgba(11,14,19,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:saturate(140%) blur(6px);
}
.brand-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  height:72px;
}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  flex:none;
  width:40px;height:40px;
  display:grid;place-items:center;
  background:var(--grad);
  color:#0B0E13;
  font-size:20px;
  font-weight:900;
  border-radius:11px;
  clip-path:polygon(10px 0,100% 0,100% calc(100% - 10px),calc(100% - 10px) 100%,0 100%,0 10px);
}
.brand-text{display:flex;flex-direction:column;min-width:0}
.brand-name{
  color:var(--text);
  font-size:17px;
  font-weight:800;
  letter-spacing:.01em;
  line-height:1.25;
  white-space:nowrap;
}
.brand-sub{
  color:var(--text-3);
  font-size:11px;
  letter-spacing:.2em;
  line-height:1.4;
}
.header-actions{display:flex;align-items:center;gap:18px}
.header-link{
  color:var(--text-2);
  font-size:14px;
  transition:color .2s ease;
}
.header-link:hover{color:var(--primary)}
.header-cta{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:10px 18px;
  border-radius:10px;
  background:var(--grad);
  color:#0B0E13;
  font-size:14px;
  font-weight:800;
  transition:transform .2s ease,box-shadow .2s ease;
}
.header-cta:hover{transform:translateY(-2px);box-shadow:var(--glow)}
.header-cta:active{transform:scale(.98)}
@media (max-width:767px){
  .header-link{display:none}
  .brand-name{font-size:15px}
  .header-cta{padding:9px 14px;font-size:13px}
}

/* 频道行 */
.channel-row{
  display:flex;
  align-items:stretch;
  gap:6px;
  height:52px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channel-row::-webkit-scrollbar{display:none}
.channel{
  display:inline-flex;
  align-items:center;
  flex:none;
  height:52px;
  padding:0 14px;
  font-size:14.5px;
  color:var(--text-2);
  border-bottom:2px solid transparent;
  transition:color .2s ease,background-color .2s ease;
  white-space:nowrap;
}
.channel:hover{
  color:var(--primary);
  background:rgba(255,90,45,.10);
  border-radius:4px 4px 0 0;
}
.channel.active{
  color:var(--primary);
  border-bottom-color:var(--primary);
  font-weight:700;
}

/* ============ 通用 ============ */
.section{padding:88px 0}
@media (max-width:767px){.section{padding:56px 0}}
.sec-head{margin-bottom:32px}
.sec-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(24px,3vw,32px);
  font-weight:700;
  margin-bottom:12px;
}
.sec-title::before{
  content:"";
  position:absolute;
  left:0;top:.26em;
  width:4px;height:20px;
  border-radius:2px;
  background:var(--primary);
}
.sec-desc{color:var(--text-2);max-width:760px;font-size:16px}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid rgba(22,224,192,.35);
  color:var(--accent);
  font-size:12.5px;
  letter-spacing:.08em;
  line-height:1.4;
  margin-bottom:16px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:10px;
  font-size:15px;
  font-weight:700;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,color .2s ease,border-color .2s ease,background-color .2s ease;
  line-height:1.2;
}
.btn-primary{background:var(--grad);color:#0B0E13}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--glow)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--text)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px)}
.btn-ghost:active{transform:scale(.98)}
.btn-sm{padding:10px 16px;font-size:14px}

.tag{
  display:inline-flex;
  align-items:center;
  gap:5px;
  padding:3px 10px;
  border-radius:8px;
  font-size:12.5px;
  font-weight:600;
  line-height:1.6;
  border:1px solid var(--line-strong);
  color:var(--text-2);
}
.tag-accent{border-color:rgba(22,224,192,.4);color:var(--accent);background:rgba(22,224,192,.08)}
.tag-primary{border-color:rgba(255,90,45,.45);color:var(--primary);background:rgba(255,90,45,.1)}

/* ============ 页头区 ============ */
.page-hero{
  position:relative;
  padding:64px 0 72px;
  border-bottom:1px solid var(--line);
  background-image:
    linear-gradient(100deg,rgba(11,14,19,.96) 0%,rgba(11,14,19,.86) 46%,rgba(11,14,19,.72) 100%),
    url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center right;
}
@media (max-width:767px){.page-hero{padding:44px 0 52px}}
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--text-3);
  margin-bottom:22px;
}
.crumb a{color:var(--text-2);transition:color .2s ease}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:var(--text-3)}
.hero-grid{
  display:grid;
  gap:40px;
  grid-template-columns:1fr;
  align-items:center;
}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1.25fr) minmax(0,.85fr);gap:56px}
}
.hero-title{
  font-size:clamp(30px,4.4vw,46px);
  font-weight:900;
  line-height:1.18;
  letter-spacing:-.01em;
  margin-bottom:18px;
}
.hero-title em{
  font-style:normal;
  background:var(--grad);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-lead{
  font-size:16.5px;
  color:var(--text-2);
  max-width:620px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.stat-bar{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
  max-width:640px;
}
@media (min-width:640px){.stat-bar{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stat-bar li{
  background:rgba(22,28,37,.82);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:14px 16px;
}
.stat-bar strong{
  display:block;
  color:var(--text);
  font-size:22px;
  font-weight:900;
  line-height:1.2;
  font-variant-numeric:tabular-nums;
}
.stat-bar span{font-size:12.5px;color:var(--text-3);letter-spacing:.02em}

.hero-visual{position:relative;display:flex;justify-content:center}
.phone-frame{
  width:min(280px,74%);
  aspect-ratio:9/16;
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--line-strong);
  background:var(--card-2);
  box-shadow:0 24px 60px rgba(0,0,0,.55);
  position:relative;
}
.phone-frame::before{
  content:"";
  position:absolute;
  top:10px;left:50%;
  transform:translateX(-50%);
  width:64px;height:5px;
  border-radius:3px;
  background:rgba(255,255,255,.18);
  z-index:2;
}
.phone-frame img{width:100%;height:100%;object-fit:cover}
.float-chip{
  position:absolute;
  bottom:18px;left:50%;
  transform:translateX(-50%);
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 16px;
  border-radius:999px;
  background:rgba(11,14,19,.9);
  border:1px solid rgba(22,224,192,.35);
  color:var(--text);
  font-size:13px;
  white-space:nowrap;
}
.dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(22,224,192,.18);
}

/* ============ 筛选 ============ */
.filter-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:28px;
}
.filter-tab{
  padding:9px 18px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--text-2);
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  transition:all .2s ease;
}
.filter-tab:hover{color:var(--primary);border-color:rgba(255,90,45,.45)}
.filter-tab.is-active{
  background:rgba(255,90,45,.12);
  border-color:rgba(255,90,45,.55);
  color:var(--primary);
}
.filter-tab:active{transform:scale(.98)}

/* ============ 版本大卡 ============ */
.ver-list{display:grid;gap:18px}
.ver-card{
  display:grid;
  grid-template-columns:140px minmax(0,1fr);
  gap:24px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:20px;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.ver-card:hover{
  border-color:rgba(255,90,45,.35);
  box-shadow:var(--shadow-card);
  transform:translateY(-2px);
}
.ver-cover{
  position:relative;
  width:140px;
  aspect-ratio:9/16;
  border-radius:var(--radius-sm);
  overflow:hidden;
  background:var(--card-2);
  border:1px solid var(--line);
}
.ver-cover img{width:100%;height:100%;object-fit:cover}
.ver-badge{
  position:absolute;
  left:8px;top:8px;
  padding:2px 9px;
  border-radius:7px;
  font-size:11.5px;
  font-weight:700;
  background:rgba(11,14,19,.82);
  border:1px solid var(--line-strong);
  color:var(--text);
}
.ver-badge.is-android{color:var(--accent);border-color:rgba(22,224,192,.4)}
.ver-badge.is-ios{color:var(--primary);border-color:rgba(255,90,45,.45)}
.ver-badge.is-history{color:var(--primary-2);border-color:rgba(255,176,32,.4)}

.ver-body{display:flex;flex-direction:column;gap:14px;min-width:0}
.ver-top{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.ver-top h3{font-size:20px;font-weight:700}
.ver-meta{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 24px;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
@media (min-width:768px){.ver-meta{grid-template-columns:repeat(4,minmax(0,1fr))}}
.ver-meta li{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:11px 0;
  border-bottom:1px solid var(--line);
}
.ver-meta li:last-child{border-bottom:0}
@media (min-width:768px){.ver-meta li{border-bottom:0}}
.ver-meta span{font-size:12.5px;color:var(--text-3);letter-spacing:.02em}
.ver-meta strong{
  color:var(--text);
  font-size:14.5px;
  font-weight:700;
  font-variant-numeric:tabular-nums;
}
.ver-note{
  font-size:14.5px;
  color:var(--text-2);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.ver-actions{display:flex;flex-wrap:wrap;gap:10px}
@media (max-width:767px){
  .ver-card{grid-template-columns:1fr;gap:16px;padding:16px}
  .ver-cover{width:100%;aspect-ratio:16/9}
  .ver-top h3{font-size:18px}
}

/* ============ 检查项 ============ */
.check-grid{
  display:grid;
  gap:16px;
  grid-template-columns:1fr;
}
@media (min-width:768px){.check-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.check-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.check-card{
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  transition:border-color .25s ease,transform .25s ease;
}
.check-card:hover{border-color:rgba(22,224,192,.35);transform:translateY(-2px)}
.check-icon{
  width:42px;height:42px;
  display:grid;place-items:center;
  border-radius:var(--radius-sm);
  background:rgba(255,90,45,.12);
  color:var(--primary);
  margin-bottom:16px;
}
.check-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.check-card p{font-size:14.5px;color:var(--text-2)}

/* ============ 流程 ============ */
.step-grid{
  display:grid;
  gap:16px;
  grid-template-columns:1fr;
  counter-reset:step;
}
@media (min-width:640px){.step-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.step-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.step-card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px 22px 22px;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.step-card:hover{border-color:rgba(255,90,45,.35);box-shadow:var(--shadow-card)}
.step-num{
  display:inline-block;
  font-size:13px;
  font-weight:800;
  letter-spacing:.12em;
  color:var(--primary);
  margin-bottom:12px;
}
.step-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.step-card p{font-size:14.5px;color:var(--text-2)}

/* ============ 安全说明 ============ */
.safe-panel{
  display:grid;
  gap:28px;
  grid-template-columns:1fr;
  background:var(--bg-2);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:32px 26px;
}
@media (min-width:1024px){
  .safe-panel{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);padding:40px 40px;gap:48px;align-items:center}
}
.safe-panel h2{font-size:clamp(22px,2.6vw,28px);font-weight:700;margin-bottom:14px}
.safe-panel > div > p{font-size:15.5px;color:var(--text-2);margin-bottom:20px}
.safe-list{display:grid;gap:12px}
.safe-list li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  padding:14px 16px;
  border-radius:var(--radius-sm);
  background:rgba(22,28,37,.85);
  border:1px solid var(--line);
  font-size:14.5px;
  transition:border-color .2s ease;
}
.safe-list li:hover{border-color:rgba(22,224,192,.35)}
.safe-list svg{flex:none;margin-top:5px;color:var(--accent)}
.safe-list strong{color:var(--text);font-weight:700}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:920px;margin:0 auto}
.faq-item{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  overflow:hidden;
  transition:border-color .22s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item[open]{border-color:rgba(255,90,45,.4);box-shadow:inset 3px 0 0 var(--primary)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:18px 22px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  font-size:16px;
  font-weight:600;
  color:var(--text);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-item[open] summary{color:var(--primary)}
.faq-icon{
  flex:none;
  width:22px;height:22px;
  display:grid;place-items:center;
  border-radius:7px;
  border:1px solid var(--line-strong);
  font-size:15px;
  line-height:1;
  color:var(--text-2);
  transition:transform .25s ease,color .25s ease,border-color .25s ease;
}
.faq-item[open] .faq-icon{transform:rotate(45deg);color:var(--primary);border-color:rgba(255,90,45,.5)}
.faq-body{
  padding:0 22px 20px;
  font-size:15px;
  color:var(--text-2);
  border-top:1px solid var(--line);
  padding-top:16px;
}

/* ============ CTA ============ */
.cta-band{
  position:relative;
  overflow:hidden;
  border-radius:20px;
  border:1px solid rgba(255,90,45,.3);
  background:
    linear-gradient(115deg,rgba(255,90,45,.2) 0%,rgba(255,176,32,.1) 42%,rgba(11,14,19,.96) 78%),
    var(--card);
  padding:40px 28px;
}
@media (min-width:1024px){.cta-band{padding:56px 48px}}
.cta-band::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:240px;height:240px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,90,45,.28),transparent 68%);
  pointer-events:none;
}
.cta-grid{
  position:relative;
  display:grid;
  gap:28px;
  grid-template-columns:1fr;
  align-items:center;
}
@media (min-width:1024px){.cta-grid{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr)}}
.cta-grid h2{font-size:clamp(24px,3vw,32px);font-weight:800;margin-bottom:12px}
.cta-grid p{font-size:15.5px;color:var(--text-2);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.cta-note{font-size:13px;color:var(--text-3);margin-top:16px}

/* ============ 页脚 ============ */
.site-footer{
  background:#0E1219;
  border-top:1px solid var(--line);
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;
  gap:32px;
  grid-template-columns:1fr;
}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--text);
  font-weight:800;
  font-size:16px;
  margin-bottom:14px;
}
.footer-brand .brand-mark{width:34px;height:34px;font-size:17px;border-radius:9px}
.footer-grid p{font-size:14px;color:var(--text-2);max-width:420px}
.footer-title{
  color:var(--text);
  font-size:15px;
  font-weight:700;
  margin-bottom:14px;
}
.footer-links{display:grid;gap:2px}
.footer-links a{
  display:inline-block;
  padding:6px 0;
  font-size:14px;
  color:var(--text-2);
  transition:color .2s ease;
}
.footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  margin-top:40px;
  padding-top:22px;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--text-3);
}

/* roulang page: category2 */
:root{
    --bg:#0B0E13;
    --surface:#12161D;
    --card:#161C25;
    --card-2:#1B222C;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --primary:#FF5A2D;
    --primary-2:#FFB020;
    --accent:#16E0C0;
    --danger:#FF4D6D;
    --text:#F5F7FA;
    --text-2:#A8B3C0;
    --text-3:#6D7885;
    --r-lg:16px;
    --r-md:12px;
    --r-sm:10px;
    --maxw:1200px;
    --glow:0 8px 24px rgba(255,90,45,.28);
    --shadow-card:0 12px 32px rgba(0,0,0,.45);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body.site{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body.site::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background-image:
      linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
    background-size:48px 48px;
  }
  img{max-width:100%;display:block;border:0;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;cursor:pointer;}
  h1,h2,h3,h4,p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}

  .container{
    position:relative;
    width:100%;
    max-width:var(--maxw);
    margin:0 auto;
    padding:0 20px;
  }
  @media(min-width:1024px){
    .container{padding:0 32px;}
  }

  /* ---------- header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(11,14,19,.86);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .brand-row{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:70px;
  }
  .brand{display:flex;align-items:center;gap:12px;min-width:0;}
  .brand-mark{
    flex:0 0 auto;
    width:40px;height:40px;
    display:grid;place-items:center;
    font-size:19px;font-weight:900;
    color:#0B0E13;
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,9px 100%,0 calc(100% - 9px));
  }
  .brand-text{display:flex;flex-direction:column;min-width:0;}
  .brand-name{font-size:17px;font-weight:800;letter-spacing:.01em;line-height:1.3;white-space:nowrap;}
  .brand-sub{font-size:11px;letter-spacing:.22em;color:var(--text-3);line-height:1.4;}
  .header-actions{display:flex;align-items:center;gap:8px;}
  .header-link{
    padding:8px 12px;border-radius:var(--r-sm);
    font-size:14px;color:var(--text-2);
    transition:color .2s ease,background .2s ease;
  }
  .header-link:hover{color:var(--primary);background:rgba(255,90,45,.10);}
  .header-cta{
    display:inline-flex;align-items:center;gap:7px;
    padding:9px 16px;border-radius:var(--r-sm);
    font-size:14px;font-weight:700;color:#0B0E13;
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    transition:transform .2s ease,box-shadow .2s ease;
  }
  .header-cta:hover{transform:translateY(-2px);box-shadow:var(--glow);}
  .header-cta:active{transform:scale(.98);}
  .header-cta:focus-visible,.header-link:focus-visible,.channel:focus-visible,.btn:focus-visible{
    outline:2px solid var(--accent);outline-offset:2px;
  }
  .channel-row{
    display:flex;align-items:center;gap:6px;
    overflow-x:auto;
    padding-bottom:2px;
    scrollbar-width:none;
    -ms-overflow-style:none;
  }
  .channel-row::-webkit-scrollbar{display:none;}
  .channel{
    position:relative;
    display:inline-flex;align-items:center;
    height:48px;padding:0 14px;
    font-size:15px;color:var(--text-2);white-space:nowrap;
    border-radius:8px;
    transition:color .2s ease,background .2s ease;
  }
  .channel:hover{color:var(--primary);background:rgba(255,90,45,.10);}
  .channel.active{color:var(--primary);font-weight:700;}
  .channel.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;
    background:var(--primary);
  }

  /* ---------- main ---------- */
  .site-main{position:relative;z-index:1;display:block;}

  /* ---------- page hero ---------- */
  .page-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
  .page-hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-2.webp');
    background-size:cover;background-position:center;
    opacity:.30;
  }
  .page-hero::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,14,19,.70),rgba(11,14,19,.92) 62%,var(--bg));
  }
  .page-hero-inner{position:relative;z-index:2;padding:36px 0 56px;}
  .crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);letter-spacing:.02em;flex-wrap:wrap;}
  .crumb a{color:var(--text-3);transition:color .2s ease;}
  .crumb a:hover{color:var(--primary);}
  .crumb span.sep{color:var(--text-3);opacity:.7;}
  .crumb .now{color:var(--text-2);}

  .hero-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:32px;
    margin-top:30px;
    align-items:end;
  }
  .hero-eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 12px;border-radius:99px;
    font-size:13px;letter-spacing:.04em;color:var(--accent);
    border:1px solid rgba(22,224,192,.35);
    background:rgba(22,224,192,.08);
    margin-bottom:18px;
  }
  .hero-eyebrow i{width:6px;height:6px;border-radius:2px;background:var(--accent);display:block;}
  .hero-title{
    font-size:clamp(30px,6vw,50px);
    line-height:1.16;
    font-weight:900;
    letter-spacing:-.01em;
  }
  .hero-title em{
    font-style:normal;
    background:linear-gradient(120deg,var(--primary),var(--primary-2));
    -webkit-background-clip:text;background-clip:text;color:transparent;
  }
  .hero-lead{margin-top:18px;max-width:640px;font-size:16px;color:var(--text-2);}

  .hero-stats{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:1px;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--line);
    overflow:hidden;
  }
  .stat-item{background:rgba(18,22,29,.86);padding:18px 16px;}
  .stat-num{font-size:24px;font-weight:900;color:var(--accent);line-height:1.2;letter-spacing:.01em;}
  .stat-label{font-size:12.5px;color:var(--text-3);letter-spacing:.04em;margin-top:4px;}

  /* ---------- section ---------- */
  .section{padding:56px 0;}
  @media(min-width:1024px){.section{padding:100px 0;}}
  .sec-head{
    display:flex;align-items:flex-end;justify-content:space-between;
    gap:18px;flex-wrap:wrap;margin-bottom:28px;
  }
  .sec-title{
    position:relative;padding-left:16px;
    font-size:clamp(22px,3.4vw,32px);
    font-weight:800;line-height:1.3;
  }
  .sec-title::before{
    content:"";position:absolute;left:0;top:.3em;
    width:4px;height:20px;border-radius:2px;background:var(--primary);
  }
  .sec-desc{margin-top:10px;font-size:14.5px;color:var(--text-3);max-width:660px;}
  .sec-more{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;color:var(--primary);
    border-bottom:1px solid rgba(255,90,45,.4);
    padding-bottom:2px;
    transition:color .2s ease,border-color .2s ease;
  }
  .sec-more:hover{color:var(--primary-2);border-color:var(--primary-2);}

  /* ---------- tag strip ---------- */
  .tag-strip{
    display:flex;align-items:center;gap:16px;flex-wrap:wrap;
    padding:18px 20px;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:linear-gradient(120deg,rgba(22,224,192,.06),rgba(255,90,45,.05));
  }
  .tag-strip-title{font-size:13px;letter-spacing:.08em;color:var(--text-3);white-space:nowrap;}
  .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;}
  .tag{
    display:inline-flex;align-items:center;
    padding:7px 14px;border-radius:99px;
    font-size:13.5px;color:var(--text-2);
    border:1px solid var(--line-strong);
    background:rgba(22,28,37,.9);
    transition:all .2s ease;
  }
  .tag:hover{color:var(--accent);border-color:rgba(22,224,192,.55);transform:translateY(-2px);}
  .tag.hot{color:var(--primary);border-color:rgba(255,90,45,.45);background:rgba(255,90,45,.10);}

  /* ---------- waterfall ---------- */
  .fall-grid{display:grid;grid-template-columns:1fr;gap:24px;}
  .fall-col{display:flex;flex-direction:column;gap:24px;}
  @media(min-width:768px){
    .fall-grid{grid-template-columns:1fr 1fr;gap:28px;}
    .fall-col{gap:28px;}
    .fall-col.offset{margin-top:60px;}
  }
  .guide-card{
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--card);
    overflow:hidden;
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .guide-card:hover{
    transform:translateY(-6px);
    border-color:rgba(255,90,45,.35);
    box-shadow:var(--shadow-card);
  }
  .guide-cover{
    position:relative;display:block;
    aspect-ratio:16/10;
    background:rgba(255,90,45,.10);
    overflow:hidden;
  }
  .guide-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
  .guide-card:hover .guide-cover img{transform:scale(1.05);}
  .guide-cover::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,14,19,0) 45%,rgba(11,14,19,.75));
  }
  .guide-badge{
    position:absolute;left:12px;top:12px;z-index:2;
    padding:5px 11px;border-radius:8px;
    font-size:12.5px;font-weight:700;letter-spacing:.02em;
    color:#0B0E13;
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
  }
  .guide-body{padding:20px 20px 22px;}
  .guide-title{font-size:19px;font-weight:700;line-height:1.5;}
  .guide-title a{transition:color .2s ease;}
  .guide-title a:hover{color:var(--primary);}
  .guide-text{margin-top:10px;font-size:14.5px;color:var(--text-2);line-height:1.8;}
  .guide-meta{
    margin-top:14px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;
    font-size:13px;color:var(--text-3);letter-spacing:.02em;
  }
  .guide-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.7;}
  .guide-meta .read{color:var(--accent);}

  /* ---------- calendar ---------- */
  .update-board{
    display:grid;grid-template-columns:1fr;gap:24px;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:var(--surface);
    padding:26px;
  }
  @media(min-width:900px){
    .update-board{grid-template-columns:1.05fr 1fr;gap:36px;padding:32px;}
  }
  .calendar{display:grid;grid-template-columns:repeat(7,1fr);gap:8px;}
  .cal-day{
    border:1px solid var(--line);
    border-radius:var(--r-md);
    background:var(--card);
    padding:12px 6px 10px;
    text-align:center;
  }
  .cal-day .wd{font-size:11.5px;color:var(--text-3);letter-spacing:.06em;}
  .cal-day .dd{font-size:16px;font-weight:800;margin-top:4px;color:var(--text-2);}
  .cal-day .dot{width:6px;height:6px;border-radius:2px;margin:8px auto 0;background:transparent;}
  .cal-day.has{border-color:rgba(255,90,45,.35);background:rgba(255,90,45,.08);}
  .cal-day.has .dd{color:var(--primary);}
  .cal-day.has .dot{background:var(--primary);}
  .cal-day.mint{border-color:rgba(22,224,192,.32);background:rgba(22,224,192,.07);}
  .cal-day.mint .dd{color:var(--accent);}
  .cal-day.mint .dot{background:var(--accent);}

  .log-list{display:flex;flex-direction:column;gap:0;}
  .log-item{
    position:relative;
    padding:0 0 20px 22px;
    border-left:1px solid var(--line);
  }
  .log-item:last-child{border-left-color:transparent;padding-bottom:0;}
  .log-item::before{
    content:"";position:absolute;left:-5px;top:8px;
    width:9px;height:9px;border-radius:2px;
    background:var(--primary);
    box-shadow:0 0 0 3px rgba(255,90,45,.16);
  }
  .log-item.mint::before{background:var(--accent);box-shadow:0 0 0 3px rgba(22,224,192,.16);}
  .log-date{font-size:13px;color:var(--text-3);letter-spacing:.04em;}
  .log-title{font-size:16.5px;font-weight:700;margin-top:2px;}
  .log-text{font-size:14px;color:var(--text-2);margin-top:6px;}

  /* ---------- rank ---------- */
  .rank-list{display:grid;gap:12px;}
  .rank-item{
    display:grid;grid-template-columns:40px 1fr;gap:14px;align-items:center;
    padding:16px 18px;
    border:1px solid var(--line);
    border-radius:14px;
    background:var(--card);
    transition:border-color .2s ease,transform .2s ease,background .2s ease;
  }
  .rank-item:hover{border-color:rgba(22,224,192,.4);transform:translateY(-3px);background:var(--card-2);}
  .rank-no{font-size:22px;font-weight:900;line-height:1;color:var(--primary);}
  .rank-item:nth-child(n+4) .rank-no{color:var(--text-3);}
  .rank-main{min-width:0;}
  .rank-name{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;}
  .rank-name span:first-child{font-size:15.5px;font-weight:600;}
  .rank-value{font-size:13px;color:var(--accent);letter-spacing:.03em;}
  .rank-bar{margin-top:10px;height:6px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;}
  .rank-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--primary),var(--primary-2));}
  .rank-note{font-size:13px;color:var(--text-3);margin-top:8px;}
  @media(min-width:900px){
    .rank-list{grid-template-columns:1fr 1fr;}
    .rank-item:first-child{grid-column:span 2;}
  }

  /* ---------- faq ---------- */
  .faq-list{display:grid;gap:14px;max-width:900px;margin:0 auto;}
  .faq-item{
    border:1px solid var(--line);
    border-radius:14px;
    background:var(--card);
    overflow:hidden;
    transition:border-color .2s ease;
  }
  .faq-item:hover{border-color:var(--line-strong);}
  .faq-item[open]{border-color:rgba(255,90,45,.35);border-left:3px solid var(--primary);}
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 22px;
    font-size:16.5px;font-weight:600;
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";font-size:22px;line-height:1;color:var(--primary);
    transition:transform .2s ease;
  }
  .faq-item[open] summary::after{content:"−";}
  .faq-item[open] summary{color:var(--primary);}
  .faq-item summary:hover{color:var(--primary);}
  .faq-body{padding:0 22px 20px;font-size:14.8px;color:var(--text-2);}

  /* ---------- cta ---------- */
  .cta-band{
    position:relative;overflow:hidden;
    display:grid;grid-template-columns:1fr;gap:28px;
    padding:32px 24px;
    border:1px solid rgba(255,90,45,.28);
    border-radius:20px;
    background:
      linear-gradient(135deg,rgba(255,90,45,.18),rgba(255,176,32,.08) 45%,rgba(22,224,192,.10));
  }
  @media(min-width:900px){
    .cta-band{grid-template-columns:1.15fr .85fr;align-items:center;padding:42px 44px;}
  }
  .cta-band::before{
    content:"";position:absolute;right:-40px;top:-40px;width:180px;height:180px;
    background:radial-gradient(circle,rgba(255,90,45,.35),transparent 70%);
  }
  .cta-title{position:relative;font-size:clamp(21px,3.2vw,30px);font-weight:800;line-height:1.3;}
  .cta-text{position:relative;margin-top:12px;font-size:15px;color:var(--text-2);max-width:560px;}
  .cta-actions{position:relative;display:flex;flex-wrap:wrap;gap:12px;margin-top:22px;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 24px;border-radius:var(--r-sm);
    font-size:15px;font-weight:700;
    border:1px solid transparent;
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease,background .2s ease;
  }
  .btn-primary{
    color:#0B0E13;
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:var(--glow);}
  .btn-ghost{
    color:var(--text);background:transparent;border-color:var(--line-strong);
  }
  .btn-ghost:hover{color:var(--accent);border-color:var(--accent);transform:translateY(-2px);}
  .btn:active{transform:scale(.98);}
  .cta-note{position:relative;margin-top:18px;font-size:12.8px;color:var(--text-3);letter-spacing:.02em;}
  .cta-side{
    position:relative;
    border:1px solid var(--line);
    border-radius:16px;
    background:rgba(11,14,19,.55);
    padding:20px;
  }
  .cta-side .line{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:11px 0;font-size:14px;color:var(--text-2);
    border-bottom:1px dashed var(--line);
  }
  .cta-side .line:last-child{border-bottom:0;}
  .cta-side .line b{color:var(--text);font-weight:700;}
  .cta-side .line em{font-style:normal;color:var(--accent);font-weight:700;}

  /* ---------- footer ---------- */
  .site-footer{
    position:relative;z-index:1;
    margin-top:20px;
    border-top:1px solid var(--line);
    background:var(--surface);
    padding:52px 0 26px;
  }
  .footer-grid{
    display:grid;grid-template-columns:1fr;gap:32px;
    padding-bottom:32px;
    border-bottom:1px solid var(--line);
  }
  @media(min-width:640px){.footer-grid{grid-template-columns:1fr 1fr;gap:36px;}}
  @media(min-width:1024px){.footer-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;}}
  .footer-brand{
    display:flex;align-items:center;gap:10px;
    font-size:16.5px;font-weight:800;margin-bottom:14px;
  }
  .footer-brand .brand-mark{width:34px;height:34px;font-size:16px;}
  .footer-grid p{font-size:14px;color:var(--text-2);max-width:420px;}
  .footer-title{font-size:14px;font-weight:700;letter-spacing:.05em;color:var(--text);margin-bottom:14px;}
  .footer-links{display:flex;flex-direction:column;gap:10px;}
  .footer-links a{
    font-size:14px;color:var(--text-2);
    transition:color .2s ease;
    width:fit-content;
  }
  .footer-links a:hover{color:var(--primary);text-decoration:underline;text-underline-offset:4px;}
  .footer-bottom{
    display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
    padding-top:20px;
    font-size:13px;color:var(--text-3);letter-spacing:.02em;
  }

  @media(max-width:767px){
    .header-link{display:none;}
    .brand-name{font-size:15px;}
    .brand-mark{width:36px;height:36px;font-size:17px;}
    .header-cta{padding:8px 13px;font-size:13px;}
    .hero-stats{grid-template-columns:1fr;}
    .stat-item{padding:14px 16px;}
    .update-board{padding:20px;}
    .faq-item summary{padding:16px 18px;font-size:15.5px;}
    .cta-band{padding:26px 18px;}
    .btn{width:100%;}
  }
  @media(min-width:520px) and (max-width:767px){
    .hero-stats{grid-template-columns:repeat(3,1fr);}
    .btn{width:auto;}
  }