/* roulang page: index */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF9F1C;
  --brand-3:#12C79A;
  --accent:#D8F94E;
  --dark:#0F1419;
  --dark-2:#17202A;
  --bg:#F6F7F4;
  --card:#FFFFFF;
  --text:#111827;
  --text-2:#4B5563;
  --text-3:#8A94A6;
  --line:#E6E8E3;
  --grad:linear-gradient(120deg,#FF6B2C 0%,#FF9F1C 45%,#12C79A 100%);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-img:16px;
  --radius-btn:12px;
  --shadow:0 8px 24px rgba(15,20,25,.06);
  --shadow-hover:0 16px 40px rgba(15,20,25,.12);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
input,textarea{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:88px 0}
.section-tight{padding:64px 0}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--radius-btn);
  padding:13px 26px;font-size:15px;font-weight:600;line-height:1;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(255,107,44,.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,107,44,.32)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(17,24,39,.18);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-dark-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);color:#fff}
.btn-dark-ghost:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{filter:saturate(.4);background:#D6D9D4;color:#8A94A6;border-color:#D6D9D4;cursor:not-allowed;box-shadow:none;transform:none}

/* ---------- 标签 / 徽章 ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:rgba(18,199,154,.12);color:#0B8A6B;
  font-size:13px;font-weight:600;line-height:1.6;
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;
  background:rgba(255,107,44,.1);color:var(--brand);
  font-size:13px;font-weight:600;line-height:1.6;
}
.badge-soft{background:#EDF3EF;color:#3E5C4E}
.badge-accent{background:rgba(216,249,78,.16);color:var(--accent);border:1px solid rgba(216,249,78,.35)}

/* ---------- 公告条 ---------- */
.notice{
  background:linear-gradient(90deg,rgba(255,107,44,.14),rgba(18,199,154,.12));
  color:#7A3A15;font-size:14px;
}
.notice-inner{display:flex;align-items:center;gap:12px;min-height:40px;padding:6px 20px;max-width:1200px;margin:0 auto}
.notice strong{font-weight:700;color:#A34715}
.notice-close{margin-left:auto;border:0;background:transparent;color:#7A3A15;font-size:20px;line-height:1;padding:4px 6px;border-radius:8px;transition:background var(--ease)}
.notice-close:hover{background:rgba(0,0,0,.06)}
.notice[hidden]{display:none}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 28px rgba(15,20,25,.08);background:rgba(255,255,255,.97)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{width:34px;height:34px;border-radius:10px;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:800;font-size:15px;box-shadow:0 6px 16px rgba(255,107,44,.28)}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.01em}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--text-2);padding:6px 0;transition:color var(--ease),transform var(--ease)}
.nav-link:hover{color:var(--brand);transform:translateY(-1px)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;background:var(--grad)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--ease),opacity var(--ease)}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-scrim{position:fixed;inset:0;background:rgba(15,20,25,.5);opacity:0;pointer-events:none;transition:opacity var(--ease);z-index:70}
body.nav-open .nav-scrim{opacity:1;pointer-events:auto}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:var(--dark);
  color:#fff;
  padding:92px 0 84px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(180deg,rgba(15,20,25,.86),rgba(15,20,25,.94)),url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
  opacity:.55;
}
.hero-glow{position:absolute;border-radius:50%;filter:blur(120px);opacity:.16;pointer-events:none}
.glow-a{width:420px;height:420px;background:var(--brand);top:-140px;left:-80px}
.glow-b{width:460px;height:460px;background:var(--brand-3);bottom:-200px;right:-60px}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:10px;padding:6px 14px;border-radius:999px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);font-size:13px;color:#E8ECEA;margin-bottom:20px}
.hero h1{font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:16px;font-size:17px;color:#C7CFCC;max-width:520px}
.hero-cta{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}
.hero-stats{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px}
.stat-chip{
  display:flex;flex-direction:column;gap:2px;
  padding:10px 18px;border-radius:14px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  min-width:132px;
}
.stat-chip .k{font-size:12px;color:#9AA5A1}
.stat-chip .v{font-size:17px;font-weight:700;color:var(--accent)}
.device{
  position:relative;border-radius:26px;padding:14px;
  background:linear-gradient(160deg,rgba(255,255,255,.16),rgba(255,255,255,.04));
  border:1px solid rgba(255,255,255,.18);
  box-shadow:0 30px 70px rgba(0,0,0,.45);
}
.device img{border-radius:18px;width:100%;height:auto}
.device-tag{
  position:absolute;right:-8px;bottom:28px;
  background:#fff;color:var(--text);border-radius:999px;
  padding:8px 16px;font-size:13px;font-weight:600;
  box-shadow:0 12px 26px rgba(15,20,25,.2);
  display:flex;align-items:center;gap:8px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--brand-3);display:inline-block}

/* ---------- 区块标题 ---------- */
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3vw,32px);font-weight:700;letter-spacing:-.01em;position:relative;padding-left:16px}
.section-head h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:4px;background:var(--grad)}
.section-head p{margin-top:10px;color:var(--text-2);font-size:15px;max-width:640px}
.text-link{color:var(--brand);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease),color var(--ease)}
.text-link:hover{gap:10px}
.section-dark{background:var(--dark);color:#fff}
.section-dark .section-head p{color:#A9B3B0}

/* ---------- 卡片 ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:28px 24px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(255,107,44,.3)}
.card h3{font-size:18px;font-weight:600;line-height:1.5}
.card p{margin-top:10px;font-size:14.5px;color:var(--text-2);line-height:1.7}

/* ---------- 价值区（非对称网格） ---------- */
.value-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:var(--gap)}
.value-main{grid-column:span 6;padding:0;overflow:hidden;display:flex;flex-direction:column}
.value-main img{border-radius:0;height:250px;object-fit:cover;width:100%}
.value-main-body{padding:28px 26px 30px}
.value-main-body h3{font-size:22px}
.value-sub{grid-column:span 3;display:flex;flex-direction:column;gap:14px}
.icon-badge{width:46px;height:46px;border-radius:14px;background:rgba(255,107,44,.1);color:var(--brand);display:grid;place-items:center;font-size:20px}
.icon-badge.green{background:rgba(18,199,154,.12);color:#0B8A6B}
.point-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.point-list li{font-size:14px;color:var(--text-2);display:flex;gap:8px;align-items:flex-start}
.point-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-3);margin-top:9px;flex-shrink:0}

/* ---------- 截图轮播 ---------- */
.shots-wrap{position:relative}
.shots{display:flex;gap:20px;overflow-x:auto;scroll-behavior:smooth;padding:6px 4px 18px;scroll-snap-type:x mandatory}
.shots::-webkit-scrollbar{height:6px}
.shots::-webkit-scrollbar-thumb{background:#D8DCD6;border-radius:999px}
.shot{
  flex:0 0 300px;scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);padding:14px;
  transition:transform var(--ease),box-shadow var(--ease);
}
.shot:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.shot img{height:340px;width:100%;object-fit:cover}
.shot-cap{margin-top:14px;font-size:14px;color:var(--text-2);line-height:1.7;padding:0 4px 6px}
.shots-nav{display:flex;align-items:center;gap:12px;justify-content:flex-end}
.arrow-btn{
  width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:#fff;
  display:grid;place-items:center;font-size:18px;color:var(--text-2);
  transition:all var(--ease);
}
.arrow-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,107,44,.18)}
.dots{display:flex;gap:8px;justify-content:center;margin-top:8px}
.dots span{width:8px;height:8px;border-radius:999px;background:#D5D9D3;transition:all var(--ease)}
.dots span.on{width:24px;background:var(--grad)}

/* ---------- 系统要求 ---------- */
.req-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.req-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px;box-shadow:var(--shadow)}
.req-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px}
.req-head h3{font-size:18px;font-weight:600}
.req-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 0;border-top:1px solid var(--line)}
.req-row:first-of-type{border-top:0}
.req-row .k{font-size:14px;color:var(--text-3)}
.req-row .v{font-size:14.5px;font-weight:600;color:var(--text)}

/* ---------- 数据带 ---------- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--gap)}
.metric{
  background:var(--dark-2);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);
  padding:26px 22px;color:#fff;transition:transform var(--ease),border-color var(--ease);
}
.metric:hover{transform:translateY(-3px);border-color:rgba(216,249,78,.35)}
.metric .v{font-size:30px;font-weight:700;color:var(--accent);line-height:1.2}
.metric .k{margin-top:8px;font-size:14px;color:#A9B3B0}
.metric .note{margin-top:4px;font-size:12.5px;color:#78837F}

/* ---------- 评价墙 ---------- */
.reviews{column-count:3;column-gap:var(--gap)}
.review{
  break-inside:avoid;margin-bottom:var(--gap);
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px 22px;box-shadow:var(--shadow);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.review:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(255,107,44,.3)}
.review-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700;font-size:15px;flex-shrink:0}
.review-name{font-size:14.5px;font-weight:600}
.review-time{font-size:12.5px;color:var(--text-3)}
.stars{color:#FF9F1C;font-size:13px;letter-spacing:2px}
.review p{font-size:14.5px;color:var(--text-2);line-height:1.8}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:start}
.news-lead{padding:0;overflow:hidden}
.news-lead-media{display:block}
.news-lead-media img{border-radius:0;height:260px;width:100%;object-fit:cover;transition:transform 400ms var(--ease)}
.news-lead:hover .news-lead-media img{transform:scale(1.03)}
.news-lead-body{padding:26px 26px 28px}
.news-lead-body h3{font-size:20px;line-height:1.55;margin-top:12px}
.news-lead-body h3 a:hover{color:var(--brand)}
.news-lead-body p{margin-top:10px;font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:16px;font-size:13px;color:var(--text-3);display:flex;gap:14px;flex-wrap:wrap}
.news-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}
.news-item{position:relative;display:block;padding:18px 22px 18px 24px;border-bottom:1px solid var(--line);transition:background var(--ease)}
.news-item:last-child{border-bottom:0}
.news-item::before{content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;background:var(--grad);opacity:0;transition:opacity var(--ease)}
.news-item:hover{background:#FAFBF8}
.news-item:hover::before{opacity:1}
.news-item h4{font-size:15.5px;font-weight:600;line-height:1.6;transition:color var(--ease)}
.news-item:hover h4{color:var(--brand)}
.news-item .meta{margin-top:8px;display:flex;gap:12px;align-items:center;font-size:12.5px;color:var(--text-3);flex-wrap:wrap}
.news-empty{padding:56px 24px;text-align:center;background:#fff;border:1px dashed var(--line);border-radius:var(--radius-lg)}
.news-empty .ico{width:56px;height:56px;border-radius:16px;background:rgba(255,107,44,.08);color:var(--brand);display:grid;place-items:center;margin:0 auto 16px;font-size:24px}
.news-empty p{color:var(--text-2);font-size:15px}
.news-empty .btn{margin-top:20px}

/* ---------- 下载 CTA ---------- */
.download-cta{
  position:relative;overflow:hidden;background:var(--dark);color:#fff;border-radius:26px;
  padding:56px 44px;
}
.download-cta::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(120deg,rgba(15,20,25,.92),rgba(15,20,25,.78)),url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;opacity:.9;
}
.download-cta::after{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad)}
.download-cta > *{position:relative;z-index:2}
.download-cta h2{font-size:clamp(24px,3vw,30px);font-weight:700;letter-spacing:-.01em}
.download-cta .lead{margin-top:12px;color:#C7CFCC;font-size:15.5px;max-width:620px}
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.dl-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-lg);padding:22px 20px;transition:transform var(--ease),border-color var(--ease),box-shadow var(--ease)}
.dl-item:hover{transform:translateY(-4px);border-color:rgba(216,249,78,.45);box-shadow:0 18px 40px rgba(0,0,0,.35)}
.dl-item h3{font-size:16px;font-weight:600}
.dl-item .note{margin-top:12px;font-size:12.5px;color:#98A3A0;line-height:1.8}
.dl-item .btn{margin-top:16px}
.dl-file{margin-top:10px;font-size:12.5px;color:#B7C0BD}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:14px;max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease)}
.faq-item.open{border-color:rgba(255,107,44,.3);box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:16px;text-align:left;
  background:transparent;border:0;padding:20px 22px;
  font-size:16px;font-weight:600;color:var(--text);
}
.faq-q:hover{color:var(--brand)}
.faq-q .sign{margin-left:auto;font-size:20px;color:var(--brand);transition:transform 200ms var(--ease);flex-shrink:0;line-height:1}
.faq-item.open .sign{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms var(--ease)}
.faq-a-inner{padding:0 22px 22px 22px;font-size:15px;color:var(--text-2);line-height:1.85;border-left:3px solid transparent;position:relative}
.faq-item.open .faq-a-inner::before{content:"";position:absolute;left:0;top:0;bottom:18px;width:3px;border-radius:3px;background:var(--grad)}
.faq-item.open .faq-a-inner{padding-left:24px;background:#FAFBF8}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#C3CBC8;margin-top:0;position:relative}
.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding:64px 0 40px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;color:#98A3A0;line-height:1.8;max-width:320px}
.footer-col h4{font-size:15px;font-weight:600;color:#E8ECEA;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:#A9B3B0;transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-col a:hover{color:var(--accent);transform:translateX(2px)}
.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:13px;color:#8A9492}
.footer-bottom a{color:#B7C0BD}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .value-main{grid-column:span 8}
  .value-sub{grid-column:span 4}
}
@media (max-width:1023px){
  .section{padding:64px 0}
  .section-tight{padding:52px 0}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(84vw,340px);
    background:var(--dark);flex-direction:column;align-items:flex-start;
    gap:6px;padding:92px 26px 32px;margin:0;
    transform:translateX(102%);transition:transform 280ms var(--ease);
    z-index:75;box-shadow:-20px 0 50px rgba(0,0,0,.35);
  }
  body.nav-open .main-nav{transform:none}
  .main-nav::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--grad)}
  .nav-link{color:#E1E6E4;font-size:16px;width:100%;padding:14px 4px;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav-link.active{color:var(--accent)}
  .nav-link.active::after{display:none}
  .nav-toggle{display:flex}
  .hero{padding:64px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-sub{max-width:100%}
  .value-main,.value-sub{grid-column:span 12}
  .value-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .reviews{column-count:2}
  .news-grid{grid-template-columns:1fr}
  .dl-grid{grid-template-columns:1fr}
  .req-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:52px 0 32px}
}
@media (max-width:767px){
  body{font-size:15.5px}
  .brand-text{font-size:16px}
  .header-inner{height:60px;gap:12px}
  .header-actions .btn-sm{display:none}
  .hero{padding:52px 0 48px}
  .section{padding:52px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .hero-cta .btn{width:100%}
  .hero-stats{gap:10px}
  .stat-chip{flex:1 1 calc(50% - 10px);min-width:0;padding:10px 14px}
  .metrics{grid-template-columns:1fr 1fr;gap:14px}
  .metric{padding:20px 16px}
  .metric .v{font-size:24px}
  .reviews{column-count:1}
  .download-cta{padding:38px 22px;border-radius:20px}
  .shot{flex:0 0 260px}
  .shot img{height:300px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .faq-q{padding:18px 18px;font-size:15px}
  .faq-a-inner{padding-left:18px;padding-right:18px}
  .faq-item.open .faq-a-inner{padding-left:20px}
}
@media (max-width:519px){
  .container{padding:0 16px}
  .hero h1{font-size:27px}
  .metrics{grid-template-columns:1fr}
  .stat-chip{flex:1 1 100%}
  .news-lead-media img{height:200px}
}

/* roulang page: category1 */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF9F1C;
  --teal:#12C79A;
  --accent:#D8F94E;
  --dark:#0F1419;
  --dark-2:#17202A;
  --bg:#F6F7F4;
  --text:#111827;
  --muted:#4B5563;
  --weak:#8A94A6;
  --line:#E6E8E3;
  --card:#FFFFFF;
  --grad:linear-gradient(120deg,#FF6B2C 0%,#FF9F1C 45%,#12C79A 100%);
  --r-lg:20px;
  --r-md:14px;
  --r-sm:12px;
  --r-img:16px;
  --sh:0 8px 24px rgba(15,20,25,.06);
  --sh-hover:0 16px 40px rgba(15,20,25,.12);
  --ease:180ms cubic-bezier(.2,.7,.3,1);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;transition:color var(--ease),background var(--ease),border-color var(--ease),transform var(--ease);}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.3;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.num{font-variant-numeric:tabular-nums;}

/* ===== 公告条 ===== */
.topbar{
  background:#FFEDE2;
  color:#7A3410;
  font-size:13.5px;
  height:40px;
  display:flex;
  align-items:center;
  position:relative;
  z-index:60;
}
.topbar .container{display:flex;align-items:center;justify-content:center;gap:10px;}
.topbar strong{color:#B3410E;font-weight:700;}
.topbar-close{
  position:absolute;right:20px;top:50%;transform:translateY(-50%);
  width:22px;height:22px;border-radius:50%;
  color:#9A4519;font-size:15px;line-height:1;
  display:flex;align-items:center;justify-content:center;
}
.topbar-close:hover{background:rgba(179,65,14,.12);}
.topbar.is-hidden{display:none;}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,247,244,.94);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 20px rgba(15,20,25,.08);background:rgba(255,255,255,.92);}
.header-inner{display:flex;align-items:center;gap:24px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:32px;height:32px;border-radius:10px;
  background:var(--grad);
  color:#fff;font-weight:700;font-size:17px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(255,107,44,.32);
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-0.01em;white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto;}
.nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--muted);
  padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--grad);border-radius:2px;
  transform:scaleX(0);transform-origin:left;transition:transform var(--ease);
}
.nav-link:hover{color:var(--brand);transform:translateY(-1px);}
.nav-link:hover::after,.nav-link.active::after{transform:scaleX(1);}
.nav-link.active{color:var(--brand);font-weight:600;}
.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:#fff;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--ease),opacity var(--ease);}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-sm);
  font-size:15px;font-weight:600;
  padding:12px 24px;
  transition:transform var(--ease),box-shadow var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(255,107,44,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(255,107,44,.38);}
.btn-primary:active{transform:translateY(1px);}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);}
.btn-dark-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);color:#fff;}
.btn-dark-ghost:hover{background:rgba(255,255,255,.2);transform:translateY(-2px);}
.btn-sm{padding:10px 18px;font-size:14px;border-radius:var(--r-sm);}
.btn-block{width:100%;}
.btn[disabled]{opacity:.55;filter:saturate(.4);pointer-events:none;}

/* ===== 面包屑 ===== */
.crumb{padding:20px 0 0;font-size:13px;color:var(--weak);}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb li{display:flex;align-items:center;gap:8px;}
.crumb li+li::before{content:"/";color:#C9CEC7;}
.crumb a:hover{color:var(--brand);}
.crumb .current{color:var(--muted);}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--dark);
  padding:72px 0 84px;
  margin-top:20px;
}
.hero::before,.hero::after{
  content:"";position:absolute;border-radius:50%;filter:blur(120px);pointer-events:none;
}
.hero::before{
  width:520px;height:520px;left:-140px;top:-180px;
  background:radial-gradient(circle,rgba(255,107,44,.55),transparent 70%);
  opacity:.18;
}
.hero::after{
  width:480px;height:480px;right:-120px;bottom:-200px;
  background:radial-gradient(circle,rgba(18,199,154,.5),transparent 70%);
  opacity:.16;
}
.hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;
}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;
  background:rgba(216,249,78,.12);
  border:1px solid rgba(216,249,78,.35);
  color:var(--accent);font-size:13px;font-weight:600;
  margin-bottom:22px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--accent);display:block;}
.hero h1{
  font-size:clamp(28px,4vw,44px);
  font-weight:700;letter-spacing:-0.01em;line-height:1.22;
}
.hero h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero-sub{
  margin-top:16px;font-size:16px;color:rgba(255,255,255,.76);max-width:520px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.badge-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.data-badge{
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  padding:8px 16px;
  font-size:13px;color:rgba(255,255,255,.68);
  display:flex;align-items:center;gap:8px;
}
.data-badge b{color:var(--accent);font-size:14px;font-weight:700;font-variant-numeric:tabular-nums;}
.device-shot{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  box-shadow:0 30px 70px rgba(0,0,0,.45);
  background:#0B0F13 url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.device-shot img{width:100%;height:100%;object-fit:cover;border-radius:0;opacity:.96;}
.device-shot::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(160deg,rgba(15,20,25,.15),rgba(15,20,25,.62));
}
.shot-meta{
  position:absolute;left:18px;bottom:18px;right:18px;z-index:3;
  display:flex;flex-wrap:wrap;gap:10px;
}
.shot-meta span{
  background:rgba(15,20,25,.72);
  border:1px solid rgba(255,255,255,.16);
  border-radius:999px;padding:5px 12px;font-size:12.5px;color:#E6EDE9;
}

/* ===== 通用板块 ===== */
.section{padding:80px 0;}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:720px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.section-head h2{
  font-size:clamp(24px,2.6vw,32px);position:relative;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--grad);
}
.section-head.center h2{padding-left:0;}
.section-head.center h2::before{display:none;}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px;}

/* ===== 步骤时间轴 ===== */
.steps{
  position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.steps::before{
  content:"";position:absolute;left:26px;right:26px;top:34px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,rgba(255,107,44,.75),rgba(255,159,28,.6),rgba(18,199,154,.75));
  opacity:.35;
}
.step{
  position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 22px 24px;box-shadow:var(--sh);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.step:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(255,107,44,.3);}
.step-no{
  position:relative;z-index:2;
  width:52px;height:52px;border-radius:16px;
  background:var(--grad);color:#fff;
  font-size:22px;font-weight:700;font-variant-numeric:tabular-nums;
  display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;box-shadow:0 10px 24px rgba(255,107,44,.3);
}
.step h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.step p{font-size:14.5px;color:var(--muted);line-height:1.75;}
.step ul{margin-top:12px;display:grid;gap:8px;}
.step ul li{
  position:relative;padding-left:16px;font-size:13.5px;color:var(--weak);
}
.step ul li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--teal);
}

/* ===== 下载卡组 ===== */
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.dl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;box-shadow:var(--sh);
  display:flex;flex-direction:column;gap:14px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.dl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(255,107,44,.3);}
.dl-card-top{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.dl-card h3{font-size:18px;font-weight:600;}
.tag{
  display:inline-flex;align-items:center;border-radius:999px;
  padding:4px 12px;font-size:12.5px;font-weight:600;
}
.tag-green{background:rgba(18,199,154,.12);color:#0B8B6C;}
.tag-orange{background:rgba(255,107,44,.1);color:#C24A13;}
.tag-accent{background:rgba(216,249,78,.28);color:#4E6410;}
.dl-card p{font-size:14.5px;color:var(--muted);}
.spec-list{display:grid;gap:10px;border-top:1px dashed var(--line);padding-top:16px;}
.spec-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:14px;}
.spec-list .k{color:var(--weak);}
.spec-list .v{font-weight:600;font-variant-numeric:tabular-nums;}
.dl-card .btn{margin-top:auto;}

/* ===== 图文交替 ===== */
.zigzag{display:grid;gap:32px;}
.zz-row{
  display:grid;grid-template-columns:1.02fr .98fr;gap:40px;align-items:center;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--sh);
  transition:transform var(--ease),box-shadow var(--ease);
}
.zz-row:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);}
.zz-row.reverse .zz-media{order:2;}
.zz-media img{width:100%;height:230px;object-fit:cover;}
.zz-body h3{font-size:20px;font-weight:600;margin-bottom:10px;}
.zz-body p{font-size:15px;color:var(--muted);}
.zz-points{margin-top:16px;display:grid;gap:10px;}
.zz-points li{display:flex;gap:10px;font-size:14.5px;color:var(--muted);align-items:flex-start;}
.zz-points li b{
  flex-shrink:0;width:22px;height:22px;border-radius:8px;
  background:rgba(18,199,154,.14);color:#0B8B6C;
  font-size:12.5px;font-weight:700;display:flex;align-items:center;justify-content:center;
  margin-top:3px;font-variant-numeric:tabular-nums;
}

/* ===== 系统要求 ===== */
.req-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:start;}
.req-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:30px 26px;box-shadow:var(--sh);
}
.req-panel h3{font-size:19px;font-weight:600;display:flex;align-items:center;gap:10px;}
.req-panel h3 .dot{width:10px;height:10px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(18,199,154,.16);}
.req-list{margin-top:20px;display:grid;gap:0;}
.req-list li{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;border-bottom:1px solid var(--line);font-size:14.5px;
}
.req-list li:last-child{border-bottom:none;}
.req-list .k{color:var(--weak);}
.req-list .v{font-weight:600;text-align:right;}
.req-side{
  background:linear-gradient(160deg,#17202A 0%,#0F1419 100%);
  color:#fff;border-radius:var(--r-lg);padding:30px 26px;
  border:1px solid rgba(255,255,255,.08);
}
.req-side h3{font-size:19px;font-weight:600;margin-bottom:14px;}
.req-side p{font-size:14.5px;color:rgba(255,255,255,.72);}
.req-side .badge-row{margin-top:22px;}
.req-side .btn{margin-top:22px;}

/* ===== 要点列表 ===== */
.notes{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh);overflow:hidden;
}
.notes .note-item{
  display:flex;gap:16px;align-items:flex-start;
  padding:20px 24px;border-bottom:1px solid var(--line);
  min-height:56px;transition:background var(--ease),box-shadow var(--ease);
}
.notes .note-item:last-child{border-bottom:none;}
.notes .note-item:hover{background:#FAFBF8;box-shadow:inset 3px 0 0 var(--brand);}
.note-item .idx{
  flex-shrink:0;width:28px;height:28px;border-radius:10px;
  background:rgba(255,107,44,.1);color:#C24A13;
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;font-variant-numeric:tabular-nums;
}
.note-item h4{font-size:15.5px;font-weight:600;margin-bottom:4px;}
.note-item p{font-size:14px;color:var(--muted);}

/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;position:relative;transition:border-color var(--ease),box-shadow var(--ease);
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--grad);transform:scaleY(0);transform-origin:top;
  transition:transform 220ms cubic-bezier(.2,.7,.3,1);
}
.faq-item.open::before{transform:scaleY(1);}
.faq-item.open{border-color:rgba(255,107,44,.32);box-shadow:var(--sh);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:16px;font-weight:600;
}
.faq-q:hover{color:var(--brand);}
.faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);color:var(--muted);
  display:flex;align-items:center;justify-content:center;font-size:16px;line-height:1;
  transition:transform 200ms cubic-bezier(.2,.7,.3,1),background var(--ease),color var(--ease),border-color var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--grad);color:#fff;border-color:transparent;}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms cubic-bezier(.2,.7,.3,1);}
.faq-a-inner{padding:0 22px 20px 22px;font-size:15px;line-height:1.85;color:var(--muted);background:#FAFBF8;padding-top:4px;}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#17202A 0%,#0F1419 100%);
  border-radius:24px;padding:52px 44px;
}
.cta-band::before{
  content:"";position:absolute;width:420px;height:420px;right:-120px;top:-160px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,44,.55),transparent 70%);filter:blur(110px);opacity:.22;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;}
.cta-band h2{font-size:clamp(22px,2.4vw,30px);}
.cta-band p{margin-top:12px;color:rgba(255,255,255,.74);font-size:15px;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.cta-mini{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px;}
.cta-mini span{font-size:12.5px;color:rgba(255,255,255,.6);background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:999px;padding:5px 12px;font-variant-numeric:tabular-nums;}
.cta-figure img{width:100%;height:250px;object-fit:cover;border-radius:var(--r-img);}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--dark);color:rgba(255,255,255,.72);
  margin-top:80px;padding-top:4px;position:relative;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--grad);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;
  padding:60px 0 40px;
}
.footer-brand .brand{margin-bottom:16px;}
.footer-brand .brand-text{color:#fff;}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:340px;}
.footer-col h4{font-size:15px;font-weight:600;color:#D6DBD8;margin-bottom:16px;}
.footer-col ul{display:grid;gap:12px;}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:var(--accent);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 28px;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.66);}
.footer-bottom a:hover{color:var(--accent);}

/* ===== 响应式 ===== */
@media (max-width:1199px){
  .container{padding:0 20px;}
}
@media (max-width:1023px){
  .header-inner{height:64px;}
  .main-nav{
    position:fixed;inset:0;z-index:80;
    background:rgba(15,20,25,.98);
    flex-direction:column;align-items:stretch;gap:0;
    padding:88px 24px 140px;margin:0;
    transform:translateX(100%);transition:transform 220ms cubic-bezier(.2,.7,.3,1);
    overflow-y:auto;
  }
  .main-nav::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:var(--grad);}
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{
    color:rgba(255,255,255,.86);font-size:17px;font-weight:500;
    padding:18px 4px;border-bottom:1px solid rgba(255,255,255,.08);
  }
  .nav-link::after{display:none;}
  .nav-link.active{color:var(--accent);}
  .nav-toggle{display:flex;position:relative;z-index:90;}
  .nav-toggle[aria-expanded="true"]{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);}
  .nav-toggle[aria-expanded="true"] span{background:#fff;}
  .header-actions .btn-primary{display:none;}
  body.nav-open{overflow:hidden;}
  .hero{padding:56px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .steps{grid-template-columns:repeat(2,1fr);}
  .steps::before{display:none;}
  .cards-3{grid-template-columns:1fr;}
  .zz-row{grid-template-columns:1fr;padding:22px;}
  .zz-row.reverse .zz-media{order:0;}
  .req-grid{grid-template-columns:1fr;}
  .cta-inner{grid-template-columns:1fr;}
  .cta-band{padding:40px 26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px;}
  .section{padding:64px 0;}
}
@media (max-width:767px){
  .topbar{font-size:12.5px;}
  .topbar .container{padding-right:44px;justify-content:flex-start;}
  .hero::before,.hero::after{filter:blur(90px);}
  .steps{grid-template-columns:1fr;}
  .zz-media img{height:190px;}
  .cta-figure img{height:200px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{justify-content:flex-start;}
  .section{padding:56px 0;}
}
@media (max-width:519px){
  .container{padding:0 16px;}
  .brand-text{font-size:16px;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .badge-row{gap:10px;}
  .data-badge{font-size:12.5px;padding:7px 13px;}
  .dl-card,.step,.req-panel,.req-side{padding:22px 18px;}
  .faq-q{padding:16px 16px;font-size:15px;}
  .faq-a-inner{padding:0 16px 18px 16px;}
  .zz-body h3{font-size:18px;}
  .footer-grid{padding:40px 0 28px;}
  .section-head h2{font-size:23px;}
}

/* roulang page: article */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF9F1C;
  --brand-3:#12C79A;
  --accent:#D8F94E;
  --dark:#0F1419;
  --dark-2:#17202A;
  --bg:#F6F7F4;
  --card:#FFFFFF;
  --text:#111827;
  --muted:#4B5563;
  --weak:#8A94A6;
  --line:#E6E8E3;
  --soft:#FAFBF8;
  --grad:linear-gradient(120deg,#FF6B2C 0%,#FF9F1C 45%,#12C79A 100%);
  --r-xl:20px;
  --r-md:14px;
  --r-sm:12px;
  --sh:0 8px 24px rgba(15,20,25,.06);
  --sh-h:0 16px 40px rgba(15,20,25,.12);
  --tr:180ms cubic-bezier(.2,.7,.3,1);
  --font:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:var(--font);font-size:15px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,h5,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:999}
.skip-link:focus{left:0}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--tr),background var(--tr);
}
.site-header.scrolled{box-shadow:0 8px 24px rgba(15,20,25,.08);background:rgba(255,255,255,.97)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;color:var(--text)}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:700;flex:0 0 auto;
  box-shadow:0 6px 16px rgba(255,107,44,.35);
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--muted);
  padding:6px 0;transition:color var(--tr),transform var(--tr);
}
.nav-link:hover{color:var(--brand);transform:translateY(-1px)}
.nav-link.active{color:var(--text);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  border-radius:2px;background:var(--grad);
}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;
  border-radius:var(--r-sm);cursor:pointer;padding:0;place-items:center;gap:4px;
  flex-direction:column;justify-content:center;align-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--tr),opacity var(--tr)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-sm);
  padding:12px 24px;font-size:15px;font-weight:600;cursor:pointer;
  transition:transform var(--tr),box-shadow var(--tr),background var(--tr),color var(--tr),border-color var(--tr);
  white-space:nowrap;
}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(255,107,44,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,107,44,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{border-color:rgba(255,107,44,.5);color:var(--brand);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- Badges / tags ---------- */
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(18,199,154,.12);color:#0B7D62;
  border-radius:999px;padding:4px 12px;font-size:13px;font-weight:600;
}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(255,107,44,.08);color:var(--brand);
  border-radius:999px;padding:4px 12px;font-size:13px;font-weight:600;
}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--weak);display:inline-block}

/* ---------- Page head / breadcrumb ---------- */
.page-head{padding:28px 0 0}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--weak)}
.breadcrumb a{color:var(--muted);transition:color var(--tr)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:#C9CFC6}
.breadcrumb .current{color:var(--text);font-weight:500;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- Article layout ---------- */
.article-wrap{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;
  gap:56px;align-items:start;padding:32px 0 0;
}
.article-main{max-width:820px;min-width:0}
.article-head h1{
  font-size:clamp(28px,4vw,44px);line-height:1.25;font-weight:700;
  letter-spacing:-.01em;margin-bottom:18px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:13px;color:var(--weak)}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.head-rule{margin:24px 0 8px;height:1px;background:var(--line);position:relative}
.head-rule::after{
  content:"";position:absolute;left:0;top:-1px;width:40px;height:3px;border-radius:3px;background:var(--grad);
}

/* ---------- Article body ---------- */
.article-body{
  margin-top:28px;max-width:760px;font-size:16px;line-height:1.9;color:#1F2733;
  word-break:break-word;
}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;font-size:26px;font-weight:700;line-height:1.45;
  letter-spacing:-.01em;margin:46px 0 18px;padding-left:16px;color:var(--text);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;
  border-radius:999px;background:var(--grad);
}
.article-body h3{font-size:19px;font-weight:600;margin:32px 0 12px;color:var(--text)}
.article-body h4{font-size:16px;font-weight:600;margin:24px 0 10px}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:1.5em}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.55em}
.article-body img{
  max-width:100%;height:auto;border-radius:16px;margin:26px auto;
  box-shadow:var(--sh);
}
.article-body figure{margin:26px 0}
.article-body figcaption{
  text-align:center;font-size:13px;color:var(--weak);margin-top:10px;
}
.article-body blockquote{
  margin:26px 0;padding:18px 22px;background:var(--soft);
  border-left:4px solid var(--brand);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--muted);font-size:15px;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:#E2551A}
.article-body strong{font-weight:700}
.article-body code{
  background:#F1F3EE;border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:14px;
}
.article-body pre{
  background:var(--dark);color:#E7ECEF;border-radius:var(--r-md);
  padding:18px 20px;overflow-x:auto;margin:24px 0;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;border:0;padding:0;color:inherit}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left}
.article-body th{background:var(--soft);font-weight:600}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}

/* ---------- Empty state ---------- */
.empty-state{
  text-align:center;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-xl);padding:56px 28px;box-shadow:var(--sh);
}
.empty-icon{
  width:56px;height:56px;border-radius:16px;background:rgba(255,107,44,.1);
  color:var(--brand);font-size:26px;font-weight:700;display:grid;place-items:center;
  margin:0 auto 18px;
}
.empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:22px}

/* ---------- Article footer / related ---------- */
.article-foot{
  display:flex;flex-wrap:wrap;gap:12px;margin-top:40px;
  padding-top:28px;border-top:1px solid var(--line);
}
.related{margin-top:48px}
.sec-title-sm{
  font-size:20px;font-weight:700;margin-bottom:18px;position:relative;padding-left:14px;
}
.sec-title-sm::before{
  content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:4px;
  border-radius:999px;background:var(--grad);
}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.card{
  display:flex;flex-direction:column;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-xl);overflow:hidden;
  box-shadow:var(--sh);transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(255,107,44,.3)}
.card-thumb{aspect-ratio:16/10;overflow:hidden;background:#EEF0EB}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms cubic-bezier(.2,.7,.3,1)}
.card:hover .card-thumb img{transform:scale(1.04)}
.card-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:16px;font-weight:600;line-height:1.5}
.card-body p{font-size:13.5px;color:var(--muted);line-height:1.7;flex:1}
.card-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--weak)}

/* ---------- Sidebar ---------- */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px}
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-xl);
  padding:24px;box-shadow:var(--sh);
}
.side-card h3{font-size:17px;font-weight:700;margin-bottom:10px}
.side-card p{font-size:14px;color:var(--muted);margin-bottom:16px}
.side-cta{
  background:linear-gradient(160deg,#0F1419,#17202A);color:#fff;border-color:transparent;
  position:relative;overflow:hidden;
}
.side-cta::after{
  content:"";position:absolute;width:240px;height:240px;right:-90px;top:-90px;
  border-radius:50%;background:var(--grad);filter:blur(80px);opacity:.35;
}
.side-cta > *{position:relative;z-index:1}
.side-cta h3{color:#fff}
.side-cta p{color:rgba(255,255,255,.7)}
.side-meta{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.side-meta li{display:flex;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.66)}
.side-meta b{color:var(--accent);font-weight:700;font-variant-numeric:tabular-nums}
.side-list li{border-bottom:1px solid var(--line)}
.side-list li:last-child{border-bottom:0}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:13px 10px 13px 0;font-size:14.5px;color:var(--muted);
  position:relative;transition:color var(--tr),background var(--tr),padding-left var(--tr);
}
.side-list a::before{
  content:"";position:absolute;left:-10px;top:8px;bottom:8px;width:3px;
  border-radius:3px;background:var(--grad);opacity:0;transition:opacity var(--tr);
}
.side-list a:hover{color:var(--brand);background:var(--soft);padding-left:10px;border-radius:8px}
.side-list a:hover::before{opacity:1}
.side-list .arrow{color:var(--weak);font-size:13px}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;margin-top:88px;padding:80px 0;
  background:linear-gradient(160deg,#0F1419 0%,#17202A 100%);color:#fff;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-2.webp) center/cover no-repeat;opacity:.16;
}
.cta-band::after{
  content:"";position:absolute;width:520px;height:520px;right:-140px;top:-200px;
  border-radius:50%;background:var(--grad);filter:blur(120px);opacity:.22;
}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center}
.cta-inner h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:14px;letter-spacing:-.01em}
.cta-inner p{color:rgba(255,255,255,.72);font-size:15px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end}
.cta-note{margin-top:14px;font-size:13px;color:rgba(255,255,255,.55);text-align:right}

/* ---------- Footer ---------- */
.site-footer{
  background:var(--dark);color:rgba(255,255,255,.72);padding:64px 0 0;
  position:relative;font-size:14px;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:44px}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{color:rgba(255,255,255,.6);font-size:14px;line-height:1.8;max-width:360px}
.footer-col h4{font-size:15px;font-weight:600;color:#D8DEE3;margin-bottom:16px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,.68);transition:color var(--tr)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding:20px 0;border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .header-inner{height:60px;gap:14px}
  .brand-text{font-size:16px}
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;bottom:0;z-index:110;
    background:#fff;padding:20px 24px 40px;margin:0;
    flex-direction:column;align-items:stretch;gap:0;
    transform:translateX(100%);
    transition:transform 240ms cubic-bezier(.2,.7,.3,1);
    overflow-y:auto;
  }
  .main-nav::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--grad)}
  .main-nav.open{transform:translateX(0)}
  .main-nav .nav-link{
    padding:18px 4px;font-size:17px;font-weight:500;
    border-bottom:1px solid var(--line);
  }
  .main-nav .nav-link.active::after{display:none}
  .main-nav .nav-link.active{color:var(--brand)}
  .article-wrap{grid-template-columns:1fr;gap:44px;padding-top:20px}
  .article-side{position:static}
  .cta-inner{grid-template-columns:1fr}
  .cta-actions{justify-content:flex-start}
  .cta-note{text-align:left}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .page-head{padding-top:18px}
  .article-wrap{padding-top:14px;gap:36px}
  .article-head h1{font-size:clamp(24px,6.4vw,32px)}
  .article-body{font-size:15.5px;line-height:1.85}
  .article-body h2{font-size:21px;margin-top:36px}
  .article-body h3{font-size:17.5px}
  .cta-band{margin-top:64px;padding:56px 0}
  .related-grid{grid-template-columns:1fr}
  .breadcrumb .current{max-width:100%;white-space:normal}
}
@media (max-width:576px){
  .header-actions .btn-sm{padding:8px 14px;font-size:13px}
  .brand-text{font-size:15px}
  .article-foot .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .side-card{padding:20px}
}

/* roulang page: category2 */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF9F1C;
  --teal:#12C79A;
  --lime:#D8F94E;
  --ink:#0F1419;
  --ink-2:#17202A;
  --bg:#F6F7F4;
  --card:#FFFFFF;
  --text:#111827;
  --muted:#4B5563;
  --weak:#8A94A6;
  --line:#E6E8E3;
  --grad:linear-gradient(120deg,#FF6B2C 0%,#FF9F1C 45%,#12C79A 100%);
  --r-lg:20px;
  --r-md:14px;
  --r-img:16px;
  --r-btn:12px;
  --sh:0 8px 24px rgba(15,20,25,.06);
  --sh-h:0 16px 40px rgba(15,20,25,.12);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul{list-style:none}
h1,h2,h3,h4{letter-spacing:-.01em;line-height:1.3}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);transition:box-shadow .18s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px rgba(15,20,25,.09)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--grad);color:#fff;
  display:grid;place-items:center;font-size:16px;font-weight:700;flex:0 0 auto;
}
.brand-text{color:var(--ink);white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--muted);padding:6px 0;
  transition:color .18s var(--ease),transform .18s var(--ease);white-space:nowrap;
}
.nav-link:hover{color:var(--brand);transform:translateY(-1px)}
.nav-link.active{color:var(--brand)}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;
  border-radius:2px;background:var(--grad);
}
.header-actions{display:flex;align-items:center;gap:14px;margin-left:8px}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  flex-direction:column;justify-content:center;align-items:center;gap:4px;background:#fff;
}
.nav-toggle span{width:16px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease)}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;
  padding:12px 24px;transition:transform .18s var(--ease),box-shadow .18s var(--ease),
  background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(255,107,44,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,107,44,.34)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-outline{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.btn-lg{padding:15px 32px;font-size:16px}
.btn-block{width:100%}

/* ============ hero ============ */
.cat-hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:76px 0 88px}
.cat-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.3;transform:scale(1.03);
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(15,20,25,.96) 0%,rgba(15,20,25,.82) 46%,rgba(15,20,25,.58) 100%);
}
.cat-hero .glow{position:absolute;border-radius:50%;filter:blur(120px);opacity:.18;pointer-events:none}
.cat-hero .glow-a{width:420px;height:420px;background:#FF6B2C;top:-140px;left:-80px}
.cat-hero .glow-b{width:360px;height:360px;background:#12C79A;bottom:-160px;right:-60px}
.cat-hero .container{position:relative;z-index:2}
.crumbs{display:flex;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:rgba(255,255,255,.68);margin-bottom:22px}
.crumbs a{transition:color .18s var(--ease)}
.crumbs a:hover{color:var(--lime)}
.crumbs .sep{opacity:.5}
.crumbs .cur{color:rgba(255,255,255,.92)}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  background:rgba(216,249,78,.12);color:var(--lime);font-size:13px;font-weight:600;
  border:1px solid rgba(216,249,78,.28);margin-bottom:20px;
}
.cat-hero h1{font-size:clamp(28px,4vw,44px);font-weight:700;max-width:820px}
.cat-hero h1 em{font-style:normal;background:linear-gradient(120deg,#FF9F1C,#12C79A);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;color:rgba(255,255,255,.78);max-width:660px;margin-top:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-badges{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero-badge{
  display:flex;align-items:center;gap:10px;padding:10px 16px;border-radius:999px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);font-size:13px;
  color:rgba(255,255,255,.78);
}
.hero-badge b{color:var(--lime);font-size:14px;font-variant-numeric:tabular-nums}

/* ============ sections ============ */
.section{padding:80px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--brand);text-transform:uppercase;margin-bottom:12px;
}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;display:flex;align-items:center;gap:12px}
.section-head h2::before{
  content:"";width:6px;height:26px;border-radius:3px;background:var(--grad);flex:0 0 auto;
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15px}

/* mini grid */
.mini-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.mini{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:var(--sh);transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.mini:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(255,107,44,.32)}
.mini-ico{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  font-size:15px;font-weight:700;color:var(--brand);background:rgba(255,107,44,.1);margin-bottom:16px;
}
.mini h3{font-size:18px;font-weight:600;margin-bottom:8px}
.mini p{font-size:14px;color:var(--muted);line-height:1.7}

/* zigzag */
.zig-row{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center;padding:24px 0}
.zig-row + .zig-row{margin-top:36px;padding-top:56px;border-top:1px dashed var(--line)}
.zig-row.reverse .zig-media{order:2}
.zig-media{position:relative}
.zig-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);
  border:1px solid var(--line);box-shadow:var(--sh);
}
.zig-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-img);
  background:linear-gradient(160deg,rgba(255,107,44,.14),rgba(18,199,154,.12));
  pointer-events:none;
}
.zig-index{
  display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:26px;
  padding:0 12px;border-radius:999px;font-size:13px;font-weight:700;color:var(--brand);
  background:rgba(255,107,44,.09);border:1px solid rgba(255,107,44,.22);margin-bottom:14px;
}
.zig-body h2{font-size:clamp(20px,2.3vw,26px);font-weight:700;margin-bottom:12px}
.zig-body > p{color:var(--muted);font-size:15px}
.tick-list{display:grid;gap:10px;margin-top:18px}
.tick-list li{position:relative;padding-left:26px;font-size:15px;color:var(--muted)}
.tick-list li::before{
  content:"";position:absolute;left:2px;top:10px;width:11px;height:6px;
  border-left:2px solid var(--teal);border-bottom:2px solid var(--teal);
  transform:rotate(-45deg);border-radius:1px;
}
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.stat{
  background:var(--ink);color:#fff;border-radius:var(--r-md);padding:12px 18px;min-width:126px;
}
.stat b{display:block;font-size:22px;line-height:1.2;color:var(--lime);font-variant-numeric:tabular-nums}
.stat span{font-size:12.5px;color:rgba(255,255,255,.7)}

/* feature list panel */
.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:34px 32px;box-shadow:var(--sh);
}
.panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 44px}
.panel-grid .tick-list{margin-top:0;gap:0}
.panel-grid .tick-list li{
  padding:14px 0 14px 30px;border-bottom:1px solid var(--line);font-size:15px;
}
.panel-grid .tick-list li:last-child{border-bottom:0}
.panel-grid .tick-list li::before{top:24px;left:4px}
.panel-note{
  margin-top:24px;padding:16px 20px;border-radius:var(--r-md);background:#FAFBF8;
  border-left:3px solid var(--brand);font-size:14px;color:var(--muted);
}

/* scene cards */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh);transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(18,199,154,.35)}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:24px}
.scene-body h3{font-size:18px;font-weight:600;margin-bottom:10px}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.75}
.scene-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  display:inline-block;padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:rgba(18,199,154,.1);color:#0B8F6E;
}

/* FAQ */
.faq-list{max-width:900px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-item:hover{border-color:rgba(255,107,44,.3)}
.faq-item[open]{box-shadow:var(--sh)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;line-height:1;color:var(--brand);font-weight:400;
  transition:transform .2s var(--ease);flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{
  padding:0 22px 20px 25px;font-size:15px;color:var(--muted);line-height:1.85;
  background:#FAFBF8;border-left:3px solid transparent;border-image:var(--grad) 1;
}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;background:var(--ink-2);color:#fff;
  border-radius:24px;padding:52px 48px;box-shadow:0 24px 60px rgba(15,20,25,.24);
}
.cta-band::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.cta-band .glow{
  position:absolute;width:340px;height:340px;border-radius:50%;
  background:#FF6B2C;filter:blur(120px);opacity:.16;bottom:-160px;right:-60px;pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;position:relative}
.cta-band p{color:rgba(255,255,255,.76);margin-top:12px;max-width:640px;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;position:relative}
.cta-meta{display:flex;flex-wrap:wrap;gap:26px;margin-top:26px;position:relative;font-size:13px;color:rgba(255,255,255,.6)}
.cta-meta b{color:var(--lime);font-variant-numeric:tabular-nums;font-weight:600}

/* footer */
.site-footer{position:relative;background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:0}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:14px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:390px}
.footer-col h4{font-size:15px;font-weight:600;color:#E5E7EB;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.55);
}
.footer-bottom a{color:var(--lime)}

/* ============ responsive ============ */
@media (max-width:1023px){
  .nav-toggle{display:flex}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);background:#fff;
    flex-direction:column;align-items:stretch;gap:0;margin:0;padding:88px 24px 28px;
    transform:translateX(102%);transition:transform .28s var(--ease);
    box-shadow:-20px 0 50px rgba(15,20,25,.18);z-index:90;overflow-y:auto;
  }
  .main-nav.open{transform:none}
  .nav-link{font-size:17px;padding:15px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-link:hover{transform:none}
  .nav-link.active::after{display:none}
  .nav-link.active{color:var(--brand)}
  .mini-grid{grid-template-columns:repeat(2,1fr)}
  .zig-row{grid-template-columns:1fr;gap:26px}
  .zig-row.reverse .zig-media{order:0}
  .zig-row + .zig-row{padding-top:40px;margin-top:28px}
  .scene-grid{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .section{padding:64px 0}
  .cta-band{padding:40px 28px;border-radius:20px}
}
@media (max-width:767px){
  .header-inner{height:60px;gap:14px}
  .brand{font-size:16px}
  .brand-text{max-width:150px;overflow:hidden;text-overflow:ellipsis}
  .cat-hero{padding:52px 0 60px}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%}
  .section{padding:52px 0}
  .section-head{margin-bottom:32px}
  .mini-grid{grid-template-columns:1fr}
  .scene-grid{grid-template-columns:1fr}
  .panel{padding:24px 20px}
  .panel-grid{grid-template-columns:1fr;gap:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .cta-meta{gap:16px}
}
@media (max-width:560px){
  .header-actions .btn-sm{padding:8px 14px;font-size:13px}
  .hero-badges{gap:10px}
  .hero-badge{padding:8px 14px;font-size:12.5px}
  .stat{flex:1 1 46%;min-width:0}
}

/* roulang page: category3 */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF9F1C;
  --teal:#12C79A;
  --lime:#D8F94E;
  --ink:#0F1419;
  --ink-2:#17202A;
  --bg:#F6F7F4;
  --text:#111827;
  --muted:#4B5563;
  --weak:#8A94A6;
  --line:#E6E8E3;
  --card:#FFFFFF;
  --grad:linear-gradient(120deg,#FF6B2C 0%,#FF9F1C 45%,#12C79A 100%);
  --r-lg:20px;
  --r-md:14px;
  --r-sm:12px;
  --sh:0 8px 24px rgba(15,20,25,.06);
  --sh-hover:0 16px 40px rgba(15,20,25,.12);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --font:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color var(--t)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em;font-weight:700}
p{margin:0}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,2.6vw,32px);position:relative;padding-left:18px}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:99px;background:var(--grad);
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:rgba(255,107,44,.08);
  border-radius:999px;padding:6px 14px;margin-bottom:16px;
}

/* ===== 顶部公告条 ===== */
.topbar{
  background:linear-gradient(90deg,rgba(255,107,44,.16),rgba(216,249,78,.28));
  color:#3B2A14;font-size:13px;
}
.topbar .container{display:flex;align-items:center;justify-content:center;gap:12px;min-height:40px;text-align:center}
.topbar strong{font-weight:700}
.topbar button{color:#3B2A14;font-size:16px;line-height:1;opacity:.6}
.topbar button:hover{opacity:1}

/* ===== 导航 ===== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.scrolled{box-shadow:0 6px 20px rgba(15,20,25,.08);background:rgba(255,255,255,.92)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  width:32px;height:32px;border-radius:10px;
  background:var(--grad);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:700;font-size:16px;
  box-shadow:0 6px 16px rgba(255,107,44,.28);
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.01em}
.main-nav{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--muted);
  padding:6px 0;transition:color var(--t),transform var(--t);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--brand);transform:translateY(-1px)}
.nav-link.active{color:var(--brand);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;background:#fff;
}
.nav-toggle span{width:18px;height:2px;border-radius:2px;background:var(--text);transition:var(--t)}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-sm);padding:13px 26px;
  font-size:15px;font-weight:600;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(255,107,44,.26)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(255,107,44,.32)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--text)}
.btn-ghost:hover{border-color:rgba(255,107,44,.5);color:var(--brand);transform:translateY(-2px)}
.btn-dark-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.3);color:#fff}
.btn-dark-ghost:hover{background:rgba(255,255,255,.2);transform:translateY(-2px)}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-block{width:100%}

/* ===== 面包屑 ===== */
.crumb{padding:20px 0 0;font-size:13px;color:var(--weak)}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumb li::after{content:"/";margin-left:8px;color:var(--line)}
.crumb li:last-child::after{content:""}
.crumb a:hover{color:var(--brand)}
.crumb [aria-current]{color:var(--muted);font-weight:600}

/* ===== Hero ===== */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:var(--ink);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(115deg,rgba(15,20,25,.94) 0%,rgba(15,20,25,.78) 48%,rgba(15,20,25,.62) 100%),
                   url("/assets/images/backpic/back-1.png");
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;width:460px;height:460px;right:-120px;top:-140px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,44,.5),transparent 65%);
  filter:blur(90px);opacity:.5;pointer-events:none;
}
.hero .container{position:relative;z-index:2;padding-top:76px;padding-bottom:80px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(28px,4vw,44px);font-weight:700}
.hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:16px;font-size:16px;color:rgba(255,255,255,.78);max-width:34em}
.hero-cta{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}
.hero-badges{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px}
.hero-badge{
  display:flex;flex-direction:column;gap:2px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-md);padding:10px 16px;min-width:120px;
}
.hero-badge b{font-size:16px;color:var(--lime);font-weight:700}
.hero-badge span{font-size:12px;color:rgba(255,255,255,.62)}
.hero-visual{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid rgba(255,255,255,.16);
  box-shadow:0 30px 70px rgba(0,0,0,.45);
  background:rgba(255,255,255,.04);
}
.hero-visual img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual figcaption{
  position:absolute;left:16px;bottom:16px;right:16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  background:rgba(15,20,25,.72);border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-md);padding:10px 14px;font-size:13px;color:rgba(255,255,255,.82);
  backdrop-filter:blur(6px);
}
.tag-lime{color:var(--lime);font-weight:700}

/* ===== 定位导航卡 ===== */
.chips{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:9px 16px;font-size:14px;color:var(--muted);font-weight:500;
  transition:var(--t);
}
.chip:hover{border-color:rgba(255,107,44,.45);color:var(--brand);transform:translateY(-2px);box-shadow:var(--sh)}

/* ===== 教程步骤区 ===== */
.tutorial-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:40px;align-items:start}
.step-card{
  display:grid;grid-template-columns:220px minmax(0,1fr);gap:26px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh);transition:var(--t);
  margin-bottom:24px;scroll-margin-top:110px;
}
.step-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(255,107,44,.3)}
.step-media{border-radius:var(--r-md);overflow:hidden;background:#EDEFEA}
.step-media img{width:100%;height:100%;min-height:150px;object-fit:cover}
.step-body{display:flex;flex-direction:column;gap:12px}
.step-num{
  display:inline-flex;align-items:baseline;gap:6px;
  font-size:34px;font-weight:700;line-height:1;
  color:transparent;background:var(--grad);-webkit-background-clip:text;background-clip:text;
}
.step-num small{font-size:13px;font-weight:600;color:var(--weak);-webkit-text-fill-color:var(--weak)}
.step-body h3{font-size:19px;font-weight:600}
.step-body p{font-size:15px;color:var(--muted)}
.step-points{display:flex;flex-direction:column;gap:8px;margin-top:2px}
.step-points li{
  position:relative;padding-left:20px;font-size:14px;color:var(--muted);
}
.step-points li::before{
  content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
  background:var(--teal);
}
.step-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:999px;padding:5px 12px;font-size:12px;font-weight:600;
  background:rgba(255,107,44,.08);color:var(--brand);
}
.badge-teal{background:rgba(18,199,154,.12);color:#0B7A5F}
.badge-dark{background:rgba(15,20,25,.9);color:var(--lime)}

/* 吸顶步骤导航 */
.side-nav{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px;box-shadow:var(--sh);
}
.side-card h4{font-size:15px;font-weight:600;margin-bottom:14px}
.side-steps{display:flex;flex-direction:column}
.side-steps a{
  display:flex;align-items:center;gap:10px;font-size:14px;color:var(--muted);
  padding:10px 10px 10px 12px;border-radius:10px;border-left:3px solid transparent;
  transition:var(--t);
}
.side-steps a:hover{background:#FAFBF8;border-left-color:var(--brand);color:var(--text)}
.side-steps a.is-active{background:#FAFBF8;border-left-color:var(--brand);color:var(--brand);font-weight:600}
.side-steps a i{
  font-style:normal;font-size:12px;font-weight:700;color:var(--weak);
  min-width:22px;
}
.side-cta{background:var(--ink);color:#fff;border-color:transparent}
.side-cta h4{color:#fff}
.side-cta p{font-size:13.5px;color:rgba(255,255,255,.7);margin-bottom:16px}
.side-cta .side-meta{font-size:12px;color:var(--lime);margin-top:10px}

/* ===== 准备事项 ===== */
.prep-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.prep-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:var(--sh);transition:var(--t);
}
.prep-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(255,107,44,.3)}
.prep-icon{
  width:44px;height:44px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(18,199,154,.12);color:#0B7A5F;font-weight:700;font-size:16px;margin-bottom:14px;
}
.prep-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.prep-card p{font-size:14px;color:var(--muted)}

/* ===== 常用设置列表 ===== */
.setting-list{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh)}
.setting-list li{
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 24px;border-bottom:1px solid var(--line);transition:var(--t);
  border-left:3px solid transparent;
}
.setting-list li:last-child{border-bottom:0}
.setting-list li:hover{background:#FAFBF8;border-left-color:var(--brand)}
.setting-list b{display:block;font-size:15px;font-weight:600}
.setting-list span{font-size:13.5px;color:var(--weak)}
.setting-value{font-size:13px;font-weight:600;color:#0B7A5F;background:rgba(18,199,154,.12);border-radius:999px;padding:5px 12px;white-space:nowrap}

/* ===== 数据带 ===== */
.stats-band{background:var(--ink-2);color:#fff;border-radius:var(--r-lg);padding:32px 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{text-align:center}
.stat b{display:block;font-size:28px;font-weight:700;color:var(--lime);letter-spacing:-.02em}
.stat span{font-size:13px;color:rgba(255,255,255,.6)}

/* ===== FAQ ===== */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:860px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;transition:var(--t);position:relative;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--grad);
  opacity:0;transition:opacity var(--t);
}
.faq-item.open::before{opacity:1}
.faq-item:hover{border-color:rgba(255,107,44,.3)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;font-size:16px;font-weight:600;text-align:left;
}
.faq-q .ic{
  flex:none;width:26px;height:26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:rgba(255,107,44,.1);color:var(--brand);font-size:16px;font-weight:700;
  transition:transform var(--t);
}
.faq-item.open .faq-q .ic{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms ease}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--muted);background:#FAFBF8;padding-top:16px}

/* ===== CTA ===== */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);color:#fff;
  padding:56px 40px;background:var(--ink);
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(120deg,rgba(15,20,25,.94),rgba(23,32,42,.82)),url("/assets/images/backpic/back-3.png");
  background-size:cover;background-position:center;
}
.cta-band::after{
  content:"";position:absolute;width:380px;height:380px;left:-100px;bottom:-160px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,199,154,.55),transparent 65%);filter:blur(90px);opacity:.45;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px)}
.cta-inner p{margin-top:14px;color:rgba(255,255,255,.75);font-size:15px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.cta-actions small{font-size:12px;color:rgba(255,255,255,.55);text-align:center}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--ink);color:rgba(255,255,255,.72);
  border-top:2px solid transparent;
  border-image:var(--grad) 1;
  padding:64px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:34em}
.footer-col h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.9);margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66)}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:var(--lime)}

/* ===== 响应式 ===== */
@media (max-width:1023px){
  .section{padding:64px 0}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero .container{padding-top:56px;padding-bottom:60px}
  .tutorial-layout{grid-template-columns:1fr}
  .side-nav{position:static;order:-1}
  .prep-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .cta-inner{grid-template-columns:1fr}
  .stats-band{grid-template-columns:repeat(2,1fr)}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);
    background:#fff;flex-direction:column;align-items:stretch;gap:0;
    padding:80px 22px 32px;box-shadow:-20px 0 50px rgba(15,20,25,.18);
    transform:translateX(102%);transition:transform 240ms cubic-bezier(.2,.7,.3,1);
    z-index:90;overflow-y:auto;
  }
  .main-nav::before{
    content:"";position:absolute;left:0;right:0;top:0;height:4px;background:var(--grad);
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav .nav-link{
    font-size:16px;padding:16px 6px;border-bottom:1px solid var(--line);color:var(--text);
  }
  .main-nav .nav-link::after{display:none}
  .main-nav .nav-link.active{color:var(--brand);background:#FAFBF8;border-radius:10px;padding-left:14px}
  .nav-toggle{display:inline-flex}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .header-inner{min-height:60px}
  .brand-text{font-size:16px}
  .step-card{grid-template-columns:1fr;padding:18px}
  .step-media img{min-height:180px}
  .prep-grid{grid-template-columns:1fr}
  .setting-list li{flex-direction:column;align-items:flex-start;gap:8px}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:40px 22px}
  .hero-badge{flex:1 1 calc(50% - 6px)}
}
@media (max-width:520px){
  .section{padding:48px 0}
  .section-tight{padding:44px 0}
  .hero-cta .btn{width:100%}
  .btn{padding:12px 20px}
  .stats-band{grid-template-columns:1fr 1fr;padding:24px 18px}
  .stat b{font-size:23px}
  .topbar .container{font-size:12px;gap:8px}
}

/* roulang page: category4 */
:root{
  --brand:#FF6B2C;
  --brand-2:#FF9F1C;
  --accent:#12C79A;
  --neon:#D8F94E;
  --ink:#0F1419;
  --ink-2:#17202A;
  --bg:#F6F7F4;
  --card:#FFFFFF;
  --text:#111827;
  --muted:#4B5563;
  --weak:#8A94A6;
  --line:#E6E8E3;
  --soft:#FAFBF8;
  --grad:linear-gradient(120deg,#FF6B2C 0%,#FF9F1C 45%,#12C79A 100%);
  --r-lg:20px;
  --r-md:14px;
  --r-img:16px;
  --r-btn:12px;
  --sh:0 8px 24px rgba(15,20,25,.06);
  --sh-h:0 16px 40px rgba(15,20,25,.12);
  --t:180ms cubic-bezier(.2,.7,.3,1);
  --font:system-ui,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
figure{margin:0}
strong{font-weight:600}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.container.narrow{max-width:920px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}

/* 顶部公告条 */
.notice-bar{background:#FFF1E5;color:#7A3A10;font-size:14px;border-bottom:1px solid #FFE0C7}
.notice-inner{display:flex;align-items:center;gap:12px;min-height:40px}
.notice-inner strong{color:var(--brand)}
.notice-inner .notice-close{margin-left:auto;background:none;border:0;color:#A9家;cursor:pointer}
.notice-close{margin-left:auto;background:none;border:0;font-size:18px;line-height:1;color:#B07647;cursor:pointer;padding:4px 6px;border-radius:8px;transition:background var(--t),color var(--t)}
.notice-close:hover{background:#FFE0C7;color:#7A3A10}
.notice-bar.hide{display:none}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,247,244,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-scrolled{background:rgba(255,255,255,.94);box-shadow:0 6px 22px rgba(15,20,25,.08)}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;flex:0 0 auto}
.brand-mark{
  width:32px;height:32px;border-radius:10px;background:var(--grad);
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:700;flex:0 0 32px;
}
.brand-text{font-size:18px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--muted);
  padding:6px 0;transition:color var(--t),transform var(--t);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.nav-link:hover{color:var(--brand);transform:translateY(-1px)}
.nav-link.active{color:var(--text);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;position:relative;z-index:95;width:42px;height:42px;border-radius:12px;
  background:#fff;border:1px solid var(--line);cursor:pointer;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color var(--t),box-shadow var(--t);
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform var(--t),opacity var(--t)}
.nav-toggle:hover{border-color:var(--brand)}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;cursor:pointer;background:transparent;color:var(--text);
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 20px rgba(255,107,44,.28)}
.btn-primary:hover{box-shadow:0 14px 30px rgba(255,107,44,.34)}
.btn-outline{background:#fff;border-color:#D9DCD5;color:var(--text)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.32);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.5)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.btn-block{width:100%}

/* 徽章与标签 */
.pill{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  font-size:13px;font-weight:600;background:rgba(255,107,44,.08);color:var(--brand);
}
.pill-light{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.24)}
.tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:500;background:#E4F8F1;color:#0B7A5E}
.badge-data{
  display:inline-flex;align-items:baseline;gap:6px;padding:10px 16px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);color:#fff;font-size:13px;
}
.badge-data b{color:var(--neon);font-size:18px;font-weight:700;font-variant-numeric:tabular-nums}

/* 首屏 */
.page-hero{position:relative;overflow:hidden;background:var(--ink);color:#fff;padding:32px 0 76px}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;opacity:.3;
}
.page-hero::after{
  content:"";position:absolute;width:560px;height:560px;right:-140px;top:-200px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,107,44,.5),rgba(255,107,44,0) 70%);
  filter:blur(50px);
}
.page-hero .glow{
  position:absolute;width:480px;height:480px;left:-160px;bottom:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,199,154,.42),rgba(18,199,154,0) 70%);
  filter:blur(55px);
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.62);margin-bottom:28px;flex-wrap:wrap}
.breadcrumb a{transition:color var(--t)}
.breadcrumb a:hover{color:var(--neon)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .current{color:rgba(255,255,255,.9)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.hero-copy h1{font-size:clamp(28px,4vw,44px);font-weight:700;margin:18px 0 0}
.hero-sub{font-size:17px;color:rgba(255,255,255,.78);margin-top:16px;max-width:520px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-stats{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-img);border:1px solid rgba(255,255,255,.16);
  box-shadow:0 24px 60px rgba(0,0,0,.4);
}
.hero-visual figcaption{margin-top:12px;font-size:13px;color:rgba(255,255,255,.6);text-align:center}

/* 区块 */
.section{padding:84px 0}
.section.sec-tight{padding:64px 0}
.section.sec-alt{background:#FFFFFF;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{
  position:relative;font-size:clamp(24px,3vw,30px);font-weight:700;padding-left:16px;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--grad);
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-head.center h2{padding-left:0}
.section-head.center h2::before{display:none}

/* 问题分组入口 */
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.topic-card{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:var(--sh);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.topic-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(255,107,44,.35)}
.topic-idx{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:rgba(18,199,154,.12);color:#0B7A5E;font-size:14px;font-weight:700;
  font-variant-numeric:tabular-nums;margin-bottom:14px;
}
.topic-card h3{font-size:18px;font-weight:600}
.topic-card p{margin-top:10px;font-size:14px;line-height:1.7;color:var(--muted)}
.topic-more{display:inline-block;margin-top:16px;font-size:13px;font-weight:600;color:var(--brand)}
.topic-card:hover .topic-more{text-decoration:underline}

/* FAQ */
.faq-group{margin-bottom:56px}
.faq-group:last-child{margin-bottom:0}
.group-head{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.group-bar{width:4px;height:22px;border-radius:4px;background:var(--grad);flex:0 0 4px}
.group-head h2{font-size:22px;font-weight:700}
.group-head .group-count{margin-left:auto;font-size:13px;color:var(--weak)}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  margin-bottom:12px;overflow:hidden;transition:box-shadow var(--t),border-color var(--t);
}
.faq-item.open{box-shadow:var(--sh);border-color:rgba(255,107,44,.35)}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:3px;background:var(--grad);
}
.faq-q:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.faq-icon{position:relative;width:18px;height:18px;flex:0 0 18px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform 200ms ease,opacity 200ms ease;
}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height 220ms ease}
.faq-a-inner{padding:2px 22px 20px;font-size:15px;line-height:1.8;color:var(--muted)}
.faq-a-inner p+p{margin-top:10px}
.faq-hint{display:flex;gap:8px;align-items:flex-start;margin-top:12px;font-size:13px;color:var(--weak)}
.faq-hint b{color:var(--brand);font-weight:600}

/* 支持渠道 */
.support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.support-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;box-shadow:var(--sh);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.support-card:hover{transform:translateY(-3px);box-shadow:var(--sh-h);border-color:rgba(255,107,44,.35)}
.support-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:rgba(255,107,44,.1);color:var(--brand);font-size:18px;font-weight:700;margin-bottom:16px;
}
.support-card h3{font-size:18px;font-weight:600}
.support-card p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--muted)}
.support-meta{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px}

/* 图文两栏 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split img{width:100%;border-radius:var(--r-img);box-shadow:var(--sh)}
.split-copy h2{font-size:clamp(24px,3vw,30px);font-weight:700}
.split-copy p{margin-top:16px;color:var(--muted);font-size:15px}
.check-list{margin-top:22px;display:grid;gap:12px}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text)}
.check-list li span.dot{
  flex:0 0 20px;width:20px;height:20px;border-radius:999px;display:grid;place-items:center;
  background:rgba(18,199,154,.14);color:#0B7A5E;font-size:12px;font-weight:700;margin-top:3px;
}

/* 步骤时间轴 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.steps::before{
  content:"";position:absolute;left:8%;right:8%;top:26px;height:2px;border-radius:2px;background:var(--grad);opacity:.35;
}
.step{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 22px;box-shadow:var(--sh)}
.step-num{
  position:relative;z-index:2;width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  background:var(--grad);color:#fff;font-size:20px;font-weight:700;font-variant-numeric:tabular-nums;
  box-shadow:0 10px 24px rgba(255,107,44,.3);margin-bottom:16px;
}
.step h3{font-size:17px;font-weight:600}
.step p{margin-top:10px;font-size:14px;line-height:1.75;color:var(--muted)}

/* 下载 CTA */
.cta-band{
  position:relative;overflow:hidden;background:linear-gradient(135deg,#0F1419 0%,#17202A 60%,#1E2A34 100%);
  color:#fff;padding:80px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;background-image:url(/assets/images/backpic/back-3.png);
  background-size:cover;background-position:center;opacity:.16;
}
.cta-band::after{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);
}
.cta-band .container{position:relative;z-index:2}
.cta-head{max-width:680px}
.cta-head h2{font-size:clamp(24px,3vw,32px);font-weight:700}
.cta-head p{margin-top:16px;color:rgba(255,255,255,.76);font-size:15px}
.cta-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.cta-item{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-lg);padding:24px 22px;
  transition:transform var(--t),border-color var(--t),background var(--t);
}
.cta-item:hover{transform:translateY(-3px);border-color:rgba(216,249,78,.5);background:rgba(255,255,255,.1)}
.cta-item h3{font-size:17px;font-weight:600}
.cta-item .cta-meta{margin-top:8px;font-size:13px;color:rgba(255,255,255,.6);font-variant-numeric:tabular-nums}
.cta-item .btn{margin-top:18px}

/* 页脚 */
.site-footer{position:relative;background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 28px}
.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:340px}
.footer-col h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.92);margin-bottom:18px}
.footer-col ul{display:grid;gap:12px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.66);transition:color var(--t)}
.footer-col a:hover{color:var(--neon)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}
.footer-bottom a{color:rgba(255,255,255,.72)}
.footer-bottom a:hover{color:var(--neon)}

/* 响应式 */
@media (max-width:1279px){
  .topic-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1023px){
  .header-inner{height:60px}
  .brand-text{font-size:16px}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;bottom:0;margin:0;z-index:70;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;padding:16px 24px 120px;overflow-y:auto;
    transform:translateX(100%);transition:transform 240ms cubic-bezier(.2,.7,.3,1);
    box-shadow:-12px 0 40px rgba(15,20,25,.12);
  }
  .main-nav.open{transform:translateX(0)}
  .main-nav .nav-link{
    font-size:17px;color:var(--text);padding:18px 4px;border-bottom:1px solid var(--line);
  }
  .main-nav .nav-link::after{display:none}
  .main-nav .nav-link.active{color:var(--brand)}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-sm{display:none}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .split{grid-template-columns:1fr;gap:32px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .steps::before{display:none}
  .cta-actions{grid-template-columns:1fr}
  .support-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
  .section.sec-tight{padding:52px 0}
  .page-hero{padding:24px 0 60px}
}
@media (max-width:767px){
  .topic-grid{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
  .hero-stats{gap:10px}
  .badge-data{padding:8px 14px}
  .badge-data b{font-size:16px}
  .cta-band{padding:60px 0}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a-inner{padding:2px 18px 18px}
}
@media (max-width:575px){
  .container{padding:0 16px}
  .footer-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .section{padding:52px 0}
  .brand-text{font-size:15px}
  .group-head h2{font-size:20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}