/* roulang page: index */
:root{
  --brand:#7A5CFF;
  --brand-deep:#5B3FE0;
  --brand-soft:#A08CFF;
  --brand-tint:rgba(122,92,255,.10);
  --brand-line:rgba(122,92,255,.30);
  --amber:#FFB020;
  --ok:#2AD9A5;
  --warn:#FF5C7A;
  --info:#4FA8FF;
  --dark:#0E0F1A;
  --dark-2:#161829;
  --bg:#FFFFFF;
  --bg-alt:#F6F6FA;
  --line:#E7E8F0;
  --text:#16182A;
  --text-2:#5B5F73;
  --text-3:#8A8FA3;
  --d-text:#F2F3F7;
  --d-text-2:#A8ACC2;
  --d-text-3:#7C8199;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --r-hero:24px;
  --sh-1:0 1px 2px rgba(14,15,26,.06);
  --sh-2:0 12px 32px rgba(14,15,26,.08);
  --sh-3:0 24px 56px rgba(14,15,26,.14);
  --container:1200px;
  --ease:220ms cubic-bezier(.4,0,.2,1);
  --font-cn:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  --font-num:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--brand-deep);}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.01em;line-height:1.3;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-weight:600;font-size:15px;line-height:1;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),border-color var(--ease),color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(122,92,255,.28);}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-3);}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(122,92,255,.28);}
.btn-outline{background:transparent;color:var(--brand);border:1px solid var(--brand-line);}
.btn-outline:hover{background:var(--brand-tint);color:var(--brand-deep);transform:translateY(-2px);}
.btn-ghost{background:rgba(255,255,255,.10);color:#fff;border:1px solid rgba(255,255,255,.18);}
.btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px);}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none;}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:10px;}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand);font-weight:600;font-size:15px;
  border-bottom:1px solid transparent;padding-bottom:2px;
}
.text-link:hover{border-bottom-color:var(--brand);color:var(--brand-deep);}
.text-link.on-dark{color:var(--brand-soft);}
.text-link.on-dark:hover{color:#fff;border-bottom-color:var(--brand-soft);}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;align-items:center;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;line-height:1.6;
  background:var(--brand-tint);color:var(--brand-deep);
}
.badge-amber{background:rgba(255,176,32,.14);color:#9A6400;}
.badge-soft{background:var(--bg-alt);color:var(--text-2);}

/* ============ 头部 ============ */
.site-header{position:relative;z-index:60;background:#fff;}
.brandbar{border-bottom:1px solid var(--line);}
.brandbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px;}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800;font-size:17px;letter-spacing:-0.01em;}
.logo:hover{color:var(--brand-deep);}
.logo-mark{
  width:34px;height:34px;border-radius:10px;flex:0 0 34px;
  background:linear-gradient(135deg,var(--brand),var(--brand-deep));
  display:inline-flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(122,92,255,.30);
}
.logo-mark svg{width:18px;height:18px;}
.brandbar-right{display:flex;align-items:center;gap:14px;}
.brand-note{font-size:13px;color:var(--text-3);}
.hamburger{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);align-items:center;justify-content:center;
}
.hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;}
.hamburger span::before,.hamburger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
}
.hamburger span::before{top:-6px;}
.hamburger span::after{top:6px;}

.channelbar{
  position:sticky;top:0;z-index:55;
  background:rgba(255,255,255,.96);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:transform 240ms ease;
}
.channelbar.is-hidden{transform:translateY(-100%);}
.channelbar-inner{height:52px;display:flex;align-items:center;overflow:hidden;}
.channel-list{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
.channel-list::-webkit-scrollbar{display:none;}
.channel{
  display:inline-flex;align-items:center;
  height:34px;padding:0 16px;border-radius:var(--r-pill);
  font-size:14px;font-weight:600;color:var(--text-2);
  border:1px solid var(--line);background:#fff;white-space:nowrap;
  transition:all var(--ease);
}
.channel:hover{color:var(--brand-deep);background:var(--brand-tint);border-color:var(--brand-line);}
.channel.active{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 6px 16px rgba(122,92,255,.26);}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,26,.6);
  opacity:0;visibility:hidden;transition:opacity 280ms ease,visibility 280ms ease;z-index:80;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:300px;max-width:86vw;
  background:#fff;z-index:90;transform:translateX(100%);
  transition:transform 280ms cubic-bezier(.4,0,.2,1);
  display:flex;flex-direction:column;padding:20px;
  box-shadow:var(--sh-3);overflow-y:auto;
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line);}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);font-size:20px;line-height:1;color:var(--text-2);}
.drawer-close:hover{color:var(--brand);border-color:var(--brand-line);}
.drawer-nav{margin-top:16px;display:flex;flex-direction:column;gap:6px;}
.drawer-nav a{padding:12px 14px;border-radius:12px;color:var(--text);font-weight:600;font-size:15px;}
.drawer-nav a:hover,.drawer-nav a.active{background:var(--brand-tint);color:var(--brand-deep);}
.drawer-cta{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;}

/* ============ Hero ============ */
.hero{
  position:relative;overflow:hidden;background:var(--dark);color:var(--d-text);
  padding:88px 0 84px;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(620px 440px at 80% 12%, rgba(122,92,255,.58), transparent 68%),
    radial-gradient(520px 400px at 8% 88%, rgba(255,176,32,.16), transparent 72%),
    linear-gradient(160deg, rgba(122,92,255,.24), rgba(14,15,26,0) 58%);
  pointer-events:none;
}
.hero .container{position:relative;z-index:2;}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);
  color:var(--d-text-2);font-size:13px;font-weight:600;margin-bottom:22px;
}
.hero-tag i{width:6px;height:6px;border-radius:50%;background:var(--ok);display:inline-block;}
.hero h1{font-size:44px;line-height:1.24;color:#fff;}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.85;color:var(--d-text-2);max-width:520px;}
.hero-actions{margin-top:32px;display:flex;align-items:center;gap:20px;flex-wrap:wrap;}
.compliance-note{margin-top:16px;font-size:13px;color:var(--d-text-3);}
.hero-visual{position:relative;}
.hero-visual>img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-hero);border:1px solid rgba(255,255,255,.10);
  box-shadow:0 24px 56px rgba(0,0,0,.45);
}
.trust-card{
  position:absolute;left:-16px;bottom:-26px;
  display:flex;align-items:center;gap:0;
  background:#fff;border-radius:var(--r-card);
  padding:16px 20px;box-shadow:var(--sh-3);
}
.trust-item{display:flex;flex-direction:column;align-items:center;padding:0 18px;gap:2px;}
.trust-item strong{font-family:var(--font-num);font-size:22px;color:var(--brand-deep);font-weight:800;line-height:1.2;}
.trust-item span{font-size:12px;color:var(--text-3);white-space:nowrap;}
.trust-divider{width:1px;height:30px;background:var(--line);}

/* ============ 通用板块 ============ */
.section{padding:92px 0;}
.section-alt{background:var(--bg-alt);}
.section-dark{background:var(--dark);color:var(--d-text);position:relative;overflow:hidden;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:40px;}
.section-head h2{font-size:32px;position:relative;padding-left:16px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--brand);
}
.section-sub{margin-top:10px;font-size:15px;color:var(--text-2);max-width:640px;}
.section-dark .section-head h2,.section-dark h2{color:#fff;}
.section-dark .section-sub{color:var(--d-text-2);}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:.05em;
  color:var(--amber);margin-bottom:12px;
}

/* ============ 痛点 ============ */
.pain-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start;}
.pain-left h2{font-size:32px;padding-left:16px;position:relative;}
.pain-left h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--brand);}
.pain-left p{margin-top:18px;color:var(--text-2);font-size:15px;}
.pain-list{border-top:1px solid var(--line);}
.pain-item{display:flex;gap:20px;padding:24px 0;border-bottom:1px solid var(--line);}
.pain-item .num{
  font-family:var(--font-num);font-size:14px;font-weight:800;color:var(--amber);
  min-width:34px;padding-top:3px;
}
.pain-item h3{font-size:18px;margin-bottom:6px;}
.pain-item p{color:var(--text-2);font-size:15px;}

/* ============ 步骤 ============ */
.steps-visual{
  border-radius:var(--r-card);overflow:hidden;margin-bottom:44px;
  border:1px solid var(--line);box-shadow:var(--sh-2);
}
.steps-visual img{width:100%;aspect-ratio:16/6;object-fit:cover;}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.step{
  padding:26px 22px;background:#fff;border:1px solid var(--line);
  border-right:0;position:relative;transition:all var(--ease);
}
.step:first-child{border-radius:var(--r-card) 0 0 var(--r-card);}
.step:last-child{border-right:1px solid var(--line);border-radius:0 var(--r-card) var(--r-card) 0;}
.step:hover{transform:translateY(-4px);border-color:var(--brand-line);box-shadow:var(--sh-2);z-index:2;}
.step-icon{
  width:42px;height:42px;border-radius:12px;background:var(--brand-tint);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.step-icon svg{width:20px;height:20px;stroke:var(--brand);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.step h3{font-size:17px;margin-bottom:8px;}
.step p{font-size:14px;color:var(--text-2);line-height:1.75;}
.step-num{
  position:absolute;top:16px;right:20px;
  font-family:var(--font-num);font-size:13px;font-weight:800;color:var(--text-3);
}
.steps-cta{margin-top:36px;display:flex;align-items:center;gap:20px;flex-wrap:wrap;}

/* ============ 数据 ============ */
.stats{
  position:relative;display:grid;grid-template-columns:repeat(4,1fr);
  gap:24px;padding:56px 44px;border-radius:var(--r-hero);
  background:linear-gradient(150deg,rgba(122,92,255,.20),rgba(255,255,255,.04));
  border:1px solid rgba(255,255,255,.10);
}
.stat{display:flex;flex-direction:column;gap:8px;}
.stat strong{
  font-family:var(--font-num);font-size:48px;font-weight:800;line-height:1;
  color:#fff;font-variant-numeric:tabular-nums;
}
.stat strong em{font-style:normal;font-size:20px;color:var(--brand-soft);margin-left:4px;}
.stat span{font-size:13px;color:var(--d-text-2);}

/* ============ 证言 ============ */
.quotes{display:grid;grid-template-columns:1fr 1fr;gap:28px;}
.quote{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:32px 30px;position:relative;transition:all var(--ease);
}
.quote:hover{transform:translateY(-4px);border-color:var(--brand-line);box-shadow:var(--sh-2);}
.quote .mark{
  font-family:var(--font-num);font-size:52px;line-height:1;color:var(--amber);
  opacity:.55;display:block;margin-bottom:6px;
}
.quote blockquote{margin:0;font-size:18px;line-height:1.8;color:var(--text);}
.quote-footer{margin-top:22px;display:flex;align-items:center;gap:12px;padding-top:18px;border-top:1px solid var(--line);}
.avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 40px;
  background:linear-gradient(135deg,var(--brand-soft),var(--brand-deep));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;
}
.quote-name{font-size:14px;font-weight:700;}
.quote-role{font-size:13px;color:var(--text-3);}

/* ============ 最新信息 ============ */
.filter-chips{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:32px;}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border-radius:var(--r-pill);font-size:14px;font-weight:600;
  border:1px solid var(--line);background:#fff;color:var(--text-2);
  transition:all var(--ease);
}
.chip:hover{color:var(--brand-deep);border-color:var(--brand-line);background:var(--brand-tint);}
.chip.active{background:var(--brand);color:#fff;border-color:var(--brand);}
.news-layout{display:grid;grid-template-columns:1.15fr 1fr;gap:28px;align-items:start;}
.news-feature{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:all var(--ease);
}
.news-feature:hover{transform:translateY(-4px);border-color:var(--brand-line);box-shadow:var(--sh-2);}
.news-feature-media{display:block;overflow:hidden;}
.news-feature-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform 420ms ease;}
.news-feature:hover .news-feature-media img{transform:scale(1.04);}
.news-feature-body{padding:26px 26px 28px;}
.news-feature-body h3{font-size:21px;margin:12px 0 10px;}
.news-feature-body h3 a{color:var(--text);}
.news-feature-body h3 a:hover{color:var(--brand-deep);}
.news-feature-body p{color:var(--text-2);font-size:15px;}
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;}
.news-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;display:flex;flex-direction:column;gap:10px;
  transition:all var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:var(--brand-line);box-shadow:var(--sh-2);}
.news-card h3{font-size:16px;line-height:1.55;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-card h3 a{color:var(--text);}
.news-card h3 a:hover{color:var(--brand-deep);}
.news-card p{font-size:14px;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);}
.news-meta time{font-size:13px;color:var(--text-3);font-family:var(--font-num);}
.empty-state{
  text-align:center;padding:64px 24px;border:1px dashed var(--line);
  border-radius:var(--r-card);background:#fff;
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
  background:var(--brand-tint);display:flex;align-items:center;justify-content:center;
}
.empty-state .empty-icon svg{width:26px;height:26px;stroke:var(--brand);fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.empty-state p{color:var(--text-2);font-size:15px;margin-bottom:20px;}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.faq-side{position:sticky;top:96px;}
.faq-side h2{font-size:32px;padding-left:16px;position:relative;}
.faq-side h2::before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:3px;background:var(--brand);}
.faq-side p{margin-top:18px;color:var(--text-2);font-size:15px;}
.faq-list{display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.faq-item.open{border-color:var(--brand-line);box-shadow:var(--sh-2);background:#FCFCFF;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 24px;text-align:left;font-size:17px;font-weight:700;color:var(--text);line-height:1.6;
  border-left:3px solid transparent;transition:border-color var(--ease),color var(--ease);
}
.faq-item.open .faq-q{border-left-color:var(--brand);color:var(--brand-deep);}
.faq-arrow{
  width:20px;height:20px;flex:0 0 20px;stroke:var(--text-3);fill:none;
  stroke-width:2;stroke-linecap:round;stroke-linejoin:round;
  transition:transform 260ms ease,stroke var(--ease);
}
.faq-item.open .faq-arrow{transform:rotate(180deg);stroke:var(--brand);}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms cubic-bezier(.4,0,.2,1);}
.faq-a p{padding:0 24px 24px 27px;color:var(--text-2);font-size:15px;line-height:1.85;}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);color:#fff;
  padding:88px 0;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:radial-gradient(600px 340px at 50% 0%, rgba(122,92,255,.48), transparent 70%);
  pointer-events:none;
}
.cta-band .container{position:relative;z-index:2;}
.cta-band h2{font-size:34px;color:#fff;}
.cta-band p{margin:18px auto 0;color:var(--d-text-2);max-width:620px;font-size:16px;}
.cta-actions{margin-top:34px;display:flex;align-items:center;justify-content:center;gap:22px;flex-wrap:wrap;}
.cta-note{margin-top:18px;font-size:13px;color:var(--d-text-3);}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:var(--d-text-2);padding:72px 0 0;border-top:1px solid rgba(255,255,255,.08);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{color:#fff;margin-bottom:18px;}
.footer-brand .logo:hover{color:var(--brand-soft);}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--d-text-3);max-width:320px;}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:18px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{color:var(--d-text-2);font-size:14px;}
.footer-col a:hover{color:var(--brand-soft);}
.footer-col li{font-size:14px;color:var(--d-text-3);}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:24px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--d-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .hero h1{font-size:38px;}
  .section{padding:80px 0;}
  .stats{padding:48px 32px;}
  .stat strong{font-size:42px;}
  .pain-grid{gap:40px;}
  .faq-grid{gap:40px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
}
@media (max-width:991px){
  .hamburger{display:inline-flex;}
  .channelbar{display:none;}
  .brand-note{display:none;}
  .hero{padding:64px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero h1{font-size:34px;}
  .hero-sub{font-size:16px;max-width:100%;}
  .trust-card{position:static;margin-top:20px;left:auto;bottom:auto;justify-content:space-around;}
  .pain-grid{grid-template-columns:1fr;gap:32px;}
  .steps{grid-template-columns:1fr 1fr;}
  .step:nth-child(2){border-right:1px solid var(--line);}
  .step:first-child{border-radius:var(--r-card) 0 0 0;}
  .step:nth-child(2){border-radius:0 var(--r-card) 0 0;}
  .step:nth-child(3){border-radius:0 0 0 var(--r-card);}
  .step:last-child{border-radius:0 0 var(--r-card) 0;}
  .step:nth-child(3),.step:nth-child(4){border-top:0;}
  .stats{grid-template-columns:1fr 1fr;gap:32px;}
  .quotes{grid-template-columns:1fr;}
  .news-layout{grid-template-columns:1fr;}
  .news-grid{grid-template-columns:1fr 1fr;}
  .faq-grid{grid-template-columns:1fr;gap:32px;}
  .faq-side{position:static;}
  .cta-band h2{font-size:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .section{padding:56px 0;}
  .section-head h2,.pain-left h2,.faq-side h2{font-size:26px;}
  .hero h1{font-size:29px;}
  .hero{padding:52px 0 60px;}
  .brandbar-inner{height:60px;}
  .logo{font-size:15px;}
  .logo-mark{width:30px;height:30px;flex:0 0 30px;}
  .btn{height:44px;padding:0 20px;}
  .trust-card{padding:14px 8px;}
  .trust-item{padding:0 10px;}
  .trust-item strong{font-size:18px;}
  .steps{grid-template-columns:1fr;}
  .step{border-right:1px solid var(--line)!important;border-top:0;}
  .step:first-child{border-radius:var(--r-card) var(--r-card) 0 0;border-top:1px solid var(--line);}
  .step:last-child{border-radius:0 0 var(--r-card) var(--r-card);}
  .news-grid{grid-template-columns:1fr;}
  .stats{grid-template-columns:1fr 1fr;padding:36px 22px;gap:26px;}
  .stat strong{font-size:34px;}
  .quote{padding:26px 22px;}
  .quote blockquote{font-size:16px;}
  .faq-q{font-size:16px;padding:18px 18px;}
  .faq-a p{padding:0 18px 20px 21px;}
  .cta-band{padding:64px 0;}
  .cta-band h2{font-size:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
}
@media (max-width:480px){
  .hero h1{font-size:26px;}
  .hero-actions{gap:14px;}
  .btn{width:100%;}
  .btn-sm{width:auto;}
  .steps-cta .btn,.cta-actions .btn{width:100%;}
  .steps-cta,.cta-actions{flex-direction:column;align-items:stretch;}
  .stats{grid-template-columns:1fr;}
}

/* roulang page: category1 */
:root{
  --c-primary:#7A5CFF;
  --c-primary-deep:#5B3FE0;
  --c-primary-soft:#A08CFF;
  --c-amber:#FFB020;
  --c-success:#2AD9A5;
  --c-info:#4FA8FF;
  --c-warn:#FF5C7A;
  --bg-deep:#0E0F1A;
  --bg-light:#FFFFFF;
  --bg-soft:#F6F6FA;
  --line:#E7E8F0;
  --t-strong:#16182A;
  --t-body:#5B5F73;
  --t-mute:#8A8FA3;
  --t-deep:#F2F3F7;
  --t-deep-2:#A8ACC2;
  --t-deep-3:#7C8199;
  --r-card:16px;
  --r-input:12px;
  --r-hero:24px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,15,26,.06);
  --sh-2:0 12px 32px rgba(14,15,26,.08);
  --sh-3:0 24px 56px rgba(14,15,26,.14);
  --container:1200px;
  --read:780px;
  --ease:.22s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-light);
  color:var(--t-strong);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  letter-spacing:0;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--c-primary);text-decoration:none;transition:color var(--ease);}
a:hover{color:var(--c-primary-deep);}
button{font-family:inherit;font-size:inherit;cursor:pointer;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--t-strong);line-height:1.35;}
p{margin:0;}
input,textarea,select{font-family:inherit;font-size:inherit;}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:6px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:88px 0;}
.section-soft{background:var(--bg-soft);}
.section-deep{background:var(--bg-deep);color:var(--t-deep);}
.section-deep h2,.section-deep h3{color:var(--t-deep);}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--c-primary);text-transform:none;margin-bottom:14px;
}
.section-deep .eyebrow{color:var(--c-primary-soft);}
.h2{
  font-size:32px;font-weight:800;line-height:1.35;position:relative;padding-left:16px;
}
.h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;
  border-radius:3px;background:var(--c-primary);
}
.section-deep .h2::before{background:var(--c-primary-soft);}
.section-lead{margin-top:18px;color:var(--t-body);font-size:16px;max-width:var(--read);}
.section-deep .section-lead{color:var(--t-deep-2);}
.section-head{margin-bottom:48px;}
.section-head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-input);
  font-size:15px;font-weight:600;line-height:1;border:1px solid transparent;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--c-primary);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-primary-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1);}
.btn-ghost{
  background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.18);
}
.btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px);}
.btn-outline{
  background:transparent;color:var(--c-primary);border-color:var(--c-primary);
}
.btn-outline:hover{background:rgba(122,92,255,.08);color:var(--c-primary-deep);transform:translateY(-2px);}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:10px;}
.btn:disabled,.btn[disabled]{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none;}
.btn.is-loading{pointer-events:none;opacity:.75;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;
  color:var(--c-primary);border-bottom:1px solid transparent;padding-bottom:2px;
  transition:border-color var(--ease),color var(--ease);
}
.link-arrow:hover{border-color:var(--c-primary);}
.link-arrow svg{width:16px;height:16px;transition:transform var(--ease);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;line-height:1.5;
  background:rgba(122,92,255,.1);color:var(--c-primary-deep);
}
.badge-amber{background:rgba(255,176,32,.15);color:#9A6400;}
.badge-deep{background:rgba(255,255,255,.1);color:var(--t-deep);}
.chip{
  display:inline-flex;align-items:center;
  padding:8px 16px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--bg-light);color:var(--t-body);font-size:14px;font-weight:600;
  transition:all var(--ease);
}
.chip:hover{border-color:rgba(122,92,255,.4);color:var(--c-primary);background:rgba(122,92,255,.05);}
.chip.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.chip.active:hover{color:#fff;}

/* ---------- 头部导航 ---------- */
.site-header{position:relative;z-index:80;background:var(--bg-light);}
.brandbar{border-bottom:1px solid var(--line);}
.brandbar-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;color:var(--t-strong);font-weight:800;}
.logo:hover{color:var(--t-strong);}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:10px;
  background:linear-gradient(135deg,var(--c-primary),var(--c-primary-deep));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 6px 16px rgba(122,92,255,.32);
}
.logo-mark svg{width:20px;height:20px;}
.logo-text{font-size:17px;font-weight:800;letter-spacing:-.01em;}
.brandbar-actions{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:44px;height:44px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:12px;background:var(--bg-light);color:var(--t-body);
  transition:all var(--ease);
}
.icon-btn:hover{border-color:rgba(122,92,255,.45);color:var(--c-primary);background:rgba(122,92,255,.05);}
.icon-btn svg{width:19px;height:19px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:12px;
  background:var(--bg-light);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(--t-strong);transition:all var(--ease);}

.channelbar{background:var(--bg-light);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:70;}
.channelbar-inner{height:56px;display:flex;align-items:center;}
.channel-list{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:4px 0;}
.channel-list::-webkit-scrollbar{display:none;}
.channel{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--bg-light);color:var(--t-body);
  font-size:14.5px;font-weight:600;white-space:nowrap;transition:all var(--ease);
}
.channel:hover{border-color:rgba(122,92,255,.45);color:var(--c-primary);background:rgba(122,92,255,.05);}
.channel.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;box-shadow:0 8px 20px rgba(122,92,255,.28);}
.channel.active:hover{color:#fff;}

/* 抽屉 */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,26,.6);opacity:0;visibility:hidden;
  transition:opacity .28s ease,visibility .28s ease;z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:86vw;background:var(--bg-light);
  z-index:100;transform:translateX(100%);transition:transform .28s cubic-bezier(.4,0,.2,1);
  padding:22px;display:flex;flex-direction:column;gap:22px;overflow-y:auto;
  box-shadow:var(--sh-3);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.drawer-title{font-size:15px;font-weight:800;color:var(--t-strong);}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:transparent;
  color:var(--t-body);display:flex;align-items:center;justify-content:center;
}
.drawer-close:hover{border-color:rgba(122,92,255,.45);color:var(--c-primary);}
.drawer-nav{display:flex;flex-direction:column;gap:8px;}
.drawer-nav a{
  display:flex;align-items:center;min-height:46px;padding:0 16px;border-radius:12px;
  border:1px solid var(--line);color:var(--t-strong);font-weight:600;font-size:15px;
}
.drawer-nav a:hover{border-color:rgba(122,92,255,.45);color:var(--c-primary);background:rgba(122,92,255,.05);}
.drawer-nav a.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.drawer-note{font-size:13px;line-height:1.7;color:var(--t-mute);}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--bg-deep);border-bottom:1px solid rgba(255,255,255,.06);}
.crumb{display:flex;align-items:center;gap:8px;height:48px;font-size:14px;color:var(--t-deep-3);overflow:hidden;white-space:nowrap;}
.crumb a{color:var(--t-deep-2);}
.crumb a:hover{color:var(--c-primary-soft);}
.crumb .sep{color:var(--t-deep-3);}
.crumb .current{color:var(--t-deep);font-weight:600;overflow:hidden;text-overflow:ellipsis;}

/* ---------- 页面 Hero ---------- */
.page-hero{position:relative;overflow:hidden;background:var(--bg-deep);}
.page-hero-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:.55;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 12% 8%,rgba(122,92,255,.55),transparent 62%),
    linear-gradient(100deg,rgba(14,15,26,.94) 0%,rgba(14,15,26,.82) 46%,rgba(14,15,26,.66) 100%);
}
.page-hero-inner{position:relative;z-index:2;padding:72px 0 76px;max-width:820px;}
.page-hero h1{
  color:var(--t-deep);font-size:44px;line-height:1.28;font-weight:800;letter-spacing:-.02em;
}
.page-hero-sub{margin-top:20px;font-size:17px;color:var(--t-deep-2);max-width:640px;}
.page-hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;}
.page-hero-meta .badge{background:rgba(255,255,255,.1);color:var(--t-deep);}
.page-hero-meta .badge.amber{background:rgba(255,176,32,.18);color:#FFD48A;}

/* ---------- 锚点条 ---------- */
.anchor-wrap{background:var(--bg-light);border-bottom:1px solid var(--line);}
.anchor-strip{display:flex;gap:10px;align-items:center;padding:16px 0;overflow-x:auto;scrollbar-width:none;}
.anchor-strip::-webkit-scrollbar{display:none;}
.anchor-strip .anchor-label{
  font-size:13px;font-weight:700;color:var(--t-mute);letter-spacing:.06em;
  padding-right:12px;border-right:1px solid var(--line);white-space:nowrap;margin-right:4px;
}

/* ---------- 速览卡片矩阵 2×2 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.overview-card{
  background:var(--bg-light);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.overview-card:hover{transform:translateY(-4px);border-color:rgba(122,92,255,.32);box-shadow:var(--sh-2);}
.overview-thumb{position:relative;aspect-ratio:16/9;background:var(--bg-soft);overflow:hidden;}
.overview-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.overview-card:hover .overview-thumb img{transform:scale(1.04);}
.overview-thumb .badge{position:absolute;left:16px;top:16px;background:rgba(255,255,255,.92);color:var(--c-primary-deep);}
.overview-body{padding:26px;display:flex;flex-direction:column;gap:12px;flex:1;}
.overview-body h3{font-size:21px;line-height:1.45;}
.overview-body p{color:var(--t-body);font-size:15.5px;}
.overview-body .link-arrow{margin-top:auto;padding-top:8px;align-self:flex-start;}

/* ---------- 非对称：核对要点 ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start;}
.split-left{position:sticky;top:96px;}
.check-list{border-top:1px solid var(--line);}
.check-item{
  display:grid;grid-template-columns:56px 1fr;gap:18px;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.check-num{
  font-size:14px;font-weight:800;color:var(--c-amber);letter-spacing:.04em;
  line-height:1.8;
}
.check-item h4{font-size:17px;margin-bottom:6px;}
.check-item p{color:var(--t-body);font-size:15px;}

/* ---------- 步骤条 ---------- */
.steps-cover{
  border-radius:var(--r-hero);overflow:hidden;aspect-ratio:21/8;margin-bottom:44px;
  border:1px solid var(--line);position:relative;
}
.steps-cover img{width:100%;height:100%;object-fit:cover;}
.stepbar{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative;}
.stepbar::before{
  content:"";position:absolute;left:34px;right:34px;top:26px;height:2px;
  background:linear-gradient(90deg,var(--c-primary),rgba(122,92,255,.18));
}
.step{position:relative;padding:0 20px 0 0;}
.step-icon{
  width:52px;height:52px;border-radius:16px;background:var(--bg-light);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  color:var(--c-primary);position:relative;z-index:2;box-shadow:var(--sh-1);
}
.step-icon svg{width:24px;height:24px;}
.step h4{margin-top:20px;font-size:17px;}
.step p{margin-top:8px;color:var(--t-body);font-size:15px;}
.step-cta{margin-top:44px;display:flex;align-items:center;gap:18px;flex-wrap:wrap;}
.compliance-note{font-size:13px;color:var(--t-mute);}

/* ---------- 深底数据带 ---------- */
.stat-band{position:relative;overflow:hidden;}
.stat-band-bg{
  position:absolute;inset:0;background-size:cover;background-position:center;opacity:.16;
}
.stat-band::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,15,26,.86),rgba(14,15,26,.95));
}
.stat-inner{position:relative;z-index:2;}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:44px;}
.stat-item{
  padding:28px 24px;border-radius:var(--r-card);
  border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03);
  transition:transform var(--ease),border-color var(--ease);
}
.stat-item:hover{transform:translateY(-4px);border-color:rgba(122,92,255,.5);}
.stat-num{
  font-size:48px;font-weight:800;line-height:1.1;color:#fff;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.stat-num span{font-size:20px;color:var(--c-primary-soft);margin-left:4px;font-weight:700;}
.stat-item p{margin-top:10px;font-size:13.5px;line-height:1.7;color:var(--t-deep-3);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:transparent;border:0;text-align:left;
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 20px;font-size:17px;font-weight:700;color:var(--t-strong);line-height:1.6;
  transition:background var(--ease),color var(--ease);
}
.faq-q:hover{background:var(--bg-soft);color:var(--c-primary-deep);}
.faq-q .faq-arrow{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center;
  color:var(--t-body);transition:transform var(--ease),background var(--ease),color var(--ease),border-color var(--ease);
  margin-top:2px;
}
.faq-q .faq-arrow svg{width:14px;height:14px;}
.faq-item.open .faq-q{background:var(--bg-soft);color:var(--c-primary-deep);border-left:3px solid var(--c-primary);}
.faq-item.open .faq-arrow{transform:rotate(180deg);background:var(--c-primary);border-color:var(--c-primary);color:#fff;}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
}
.faq-a-inner{padding:0 20px 24px 23px;color:var(--t-body);font-size:15.5px;max-width:var(--read);}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;background:var(--bg-deep);padding:80px 0;text-align:center;
}
.cta-band-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.2;}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(700px 340px at 50% 0%,rgba(122,92,255,.5),transparent 66%),
             linear-gradient(180deg,rgba(14,15,26,.9),rgba(14,15,26,.96));
}
.cta-inner{position:relative;z-index:2;max-width:720px;margin:0 auto;}
.cta-inner h2{font-size:32px;color:var(--t-deep);}
.cta-inner p{margin-top:16px;color:var(--t-deep-2);font-size:16px;}
.cta-actions{margin-top:32px;display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;}
.cta-actions .link-arrow{color:var(--c-primary-soft);}
.cta-actions .link-arrow:hover{color:#fff;border-color:var(--c-primary-soft);}
.cta-compliance{margin-top:22px;font-size:13px;color:var(--t-deep-3);}

/* ---------- 页脚 ---------- */
.site-footer{background:#0A0B12;color:var(--t-deep-2);padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.06);}
.footer-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .logo{color:var(--t-deep);margin-bottom:18px;}
.footer-brand .logo:hover{color:var(--t-deep);}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--t-deep-3);max-width:340px;}
.footer-col h4{font-size:15px;color:var(--t-deep);margin-bottom:16px;font-weight:700;}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col li{font-size:14px;color:var(--t-deep-3);line-height:1.7;}
.footer-col a{color:var(--t-deep-2);font-size:14px;}
.footer-col a:hover{color:var(--c-primary-soft);}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--t-deep-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .page-hero h1{font-size:38px;}
}
@media (max-width:991px){
  .nav-toggle{display:flex;}
  .channelbar-inner{height:auto;padding:10px 0;}
  .brandbar-actions .btn-sm{display:none;}
  .split{grid-template-columns:1fr;gap:36px;}
  .split-left{position:static;}
  .stepbar{grid-template-columns:repeat(2,1fr);gap:32px 24px;}
  .stepbar::before{display:none;}
  .step{padding-right:12px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:64px 0;}
  .h2{font-size:27px;}
  .page-hero-inner{padding:56px 0 60px;}
  .page-hero h1{font-size:32px;}
  .cta-inner h2{font-size:27px;}
}
@media (max-width:767px){
  .container{padding:0 18px;}
  .card-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:1fr;}
  .stepbar{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .section{padding:48px 0;}
  .section-head{margin-bottom:32px;}
  .h2{font-size:24px;}
  .page-hero h1{font-size:28px;}
  .page-hero-sub{font-size:15.5px;}
  .overview-body{padding:22px;}
  .check-item{grid-template-columns:44px 1fr;gap:12px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .faq-q{font-size:15.5px;padding:20px 14px;}
  .faq-a-inner{padding:0 14px 22px 17px;}
}
@media (max-width:480px){
  .logo-text{font-size:15px;}
  .stat-num{font-size:36px;}
  .cta-actions{flex-direction:column;width:100%;}
  .cta-actions .btn{width:100%;}
}

/* roulang page: article */
:root{
  --brand:#7A5CFF;
  --brand-deep:#5B3FE0;
  --brand-soft:#A08CFF;
  --accent:#FFB020;
  --ok:#2AD9A5;
  --danger:#FF5C7A;
  --info:#4FA8FF;
  --dark:#0E0F1A;
  --dark-2:#161827;
  --light:#FFFFFF;
  --light-2:#F6F6FA;
  --line:#E7E8F0;
  --text:#16182A;
  --text-2:#5B5F73;
  --text-3:#8A8FA3;
  --d-text:#F2F3F7;
  --d-text-2:#A8ACC2;
  --d-text-3:#7C8199;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --r-hero:24px;
  --sh1:0 1px 2px rgba(14,15,26,.06);
  --sh2:0 12px 32px rgba(14,15,26,.08);
  --sh3:0 24px 56px rgba(14,15,26,.14);
  --container:1200px;
  --prose:780px;
  --t:220ms cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--light);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-deep)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.3}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea{font:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:var(--light-2)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:transform var(--t),background var(--t),color var(--t),box-shadow var(--t),border-color var(--t);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(122,92,255,.28)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh3)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh1)}
.btn-outline{border:1px solid var(--brand);color:var(--brand);background:transparent}
.btn-outline:hover{background:rgba(122,92,255,.08);color:var(--brand-deep);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.16)}
.btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:600;font-size:14px}
.link-arrow span{display:inline-block;transition:transform var(--t)}
.link-arrow:hover span{transform:translateX(4px)}

/* ---------- brand bar ---------- */
.site-header{position:relative;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.brandbar-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text)}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  box-shadow:0 6px 16px rgba(122,92,255,.35);flex:0 0 auto;
}
.logo-mark svg{width:20px;height:20px}
.logo-text{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.brand-actions{display:flex;align-items:center;gap:12px}
.brand-note{font-size:13px;color:var(--text-3);line-height:1.7;margin-right:6px}
.search-btn{
  width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);transition:all var(--t);
}
.search-btn:hover{border-color:var(--brand);color:var(--brand);background:rgba(122,92,255,.06)}

/* ---------- channel bar ---------- */
.channelbar{
  position:sticky;top:0;z-index:55;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);
  transition:transform var(--t);
}
.channelbar.is-hidden{transform:translateY(-100%)}
.channelbar-inner{display:flex;align-items:center;height:52px}
.channel-list{display:flex;align-items:center;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:4px 0}
.channel-list::-webkit-scrollbar{display:none}
.channel{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:var(--r-pill);
  border:1px solid var(--line);color:var(--text-2);font-size:14px;font-weight:600;white-space:nowrap;
  transition:all var(--t);
}
.channel:hover{color:var(--brand);border-color:rgba(122,92,255,.4);background:rgba(122,92,255,.06)}
.channel.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(122,92,255,.28)}

.menu-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);
  align-items:center;justify-content:center;color:var(--text-2);
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- drawer ---------- */
.nav-overlay{
  position:fixed;inset:0;background:rgba(14,15,26,.6);opacity:0;visibility:hidden;
  transition:opacity var(--t),visibility var(--t);z-index:90;
}
.nav-overlay.show{opacity:1;visibility:visible}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:280px;max-width:86vw;background:#fff;z-index:100;
  transform:translateX(102%);transition:transform 280ms cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;padding:20px;box-shadow:var(--sh3);
}
.nav-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--text-2)}
.drawer-links{display:flex;flex-direction:column;gap:6px;flex:1}
.drawer-links a{padding:12px 14px;border-radius:var(--r-btn);color:var(--text-2);font-weight:600;font-size:15px}
.drawer-links a:hover{background:var(--light-2);color:var(--brand)}
.drawer-links a.active{background:rgba(122,92,255,.1);color:var(--brand-deep)}
.drawer-foot{padding-top:16px;border-top:1px solid var(--line);font-size:13px;color:var(--text-3);line-height:1.8}

/* ---------- article hero ---------- */
.article-hero{position:relative;background:var(--dark);color:var(--d-text);padding:26px 0 54px;overflow:hidden}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;opacity:.2;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(880px 420px at 84% -10%,rgba(122,92,255,.62),transparent 68%),
             linear-gradient(180deg,rgba(14,15,26,.55),rgba(14,15,26,.92));
}
.article-hero .container{position:relative;z-index:2}
.crumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--d-text-3);flex-wrap:wrap}
.crumb a{color:var(--d-text-2)}
.crumb a:hover{color:#fff}
.crumb .sep{color:var(--d-text-3)}
.crumb .current{color:var(--d-text-2);max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-line{display:inline-flex;align-items:center;gap:10px;margin-top:26px;color:var(--accent);font-size:13px;font-weight:700;letter-spacing:.08em}
.hero-line::before{content:"";width:22px;height:2px;background:var(--accent);display:block;border-radius:2px}
.article-hero h1{
  font-size:36px;line-height:1.32;margin:14px 0 0;max-width:900px;color:#fff;
}
.article-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:20px;font-size:14px;color:var(--d-text-2)}
.meta-badge{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(122,92,255,.22);color:var(--brand-soft);font-weight:700;font-size:13px;
  border:1px solid rgba(160,140,255,.35);
}
.meta-dot{color:var(--d-text-3)}
.article-hero .hero-tip{margin-top:14px;font-size:13px;color:var(--d-text-3)}

/* ---------- article body ---------- */
.article-main{padding:56px 0 72px;background:#fff}
.article-layout{
  display:grid;grid-template-columns:minmax(0,var(--prose)) 260px;
  gap:56px;justify-content:center;align-items:start;
}
.article-body{min-width:0}
.lead{
  font-size:17px;color:var(--text-2);background:var(--light-2);border-left:3px solid var(--brand);
  border-radius:12px;padding:18px 22px;margin-bottom:32px;line-height:1.85;
}
.prose{font-size:17px;line-height:1.9;color:var(--text);word-break:break-word}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 1.15em}
.prose h2{
  position:relative;font-size:28px;margin:48px 0 16px;padding-left:16px;color:var(--text);
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-soft));
}
.prose h3{font-size:21px;margin:32px 0 12px;color:var(--text)}
.prose h4{font-size:17px;margin:24px 0 10px;color:var(--text-2)}
.prose a{border-bottom:1px solid rgba(122,92,255,.4)}
.prose a:hover{border-color:var(--brand-deep)}
.prose strong{font-weight:700}
.prose ul,.prose ol{margin:0 0 1.15em;padding-left:4px}
.prose ul li{position:relative;padding-left:22px;margin-bottom:.5em}
.prose ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--brand);
}
.prose ol{counter-reset:li}
.prose ol li{position:relative;padding-left:30px;margin-bottom:.5em;counter-increment:li}
.prose ol li::before{
  content:counter(li);position:absolute;left:0;top:.12em;
  width:20px;height:20px;border-radius:50%;background:rgba(122,92,255,.12);color:var(--brand-deep);
  font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.prose blockquote{
  margin:0 0 1.2em;padding:20px 22px;background:var(--light-2);border-left:3px solid var(--accent);
  border-radius:12px;color:var(--text-2);font-size:16px;
}
.prose img{border-radius:12px;margin:24px 0 8px;width:100%;height:auto}
.prose figure{margin:24px 0}
.prose figcaption{font-size:13px;color:var(--text-3);text-align:center;line-height:1.7}
.prose table{width:100%;border-collapse:collapse;margin:0 0 1.3em;font-size:15px;display:block;overflow-x:auto}
.prose th,.prose td{border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:nowrap}
.prose thead th{background:var(--light-2);font-weight:700}
.prose tbody tr:nth-child(even){background:#FAFAFC}
.prose code{background:var(--light-2);border-radius:6px;padding:2px 6px;font-size:15px;color:var(--brand-deep)}
.prose hr{border:0;height:1px;background:linear-gradient(90deg,var(--line),transparent);margin:36px 0}

/* ---------- sidebar ---------- */
.sidebar{position:sticky;top:76px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh1);
}
.side-card h3{font-size:16px;margin-bottom:14px;color:var(--text)}
.side-card h3::before{
  content:"";display:inline-block;width:3px;height:14px;border-radius:2px;background:var(--brand);
  margin-right:8px;vertical-align:-1px;
}
.side-list{display:flex;flex-direction:column}
.side-list a{
  display:block;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--text-2);font-weight:600;
}
.side-list li:last-child a{border-bottom:0}
.side-list a:hover{color:var(--brand)}
.side-cta{
  background:linear-gradient(150deg,var(--dark) 0%,#241d4d 100%);border:1px solid rgba(255,255,255,.08);
  color:var(--d-text);border-radius:var(--r-card);padding:22px;
}
.side-cta p{font-size:13px;color:var(--d-text-2);margin:8px 0 16px;line-height:1.8}
.side-cta .btn{width:100%;height:44px}
.side-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;background:var(--light-2);color:var(--text-2);border:1px solid var(--line);
  transition:all var(--t);
}
.tag:hover{color:var(--brand);border-color:rgba(122,92,255,.4);background:rgba(122,92,255,.07)}
.tag.is-accent{background:rgba(255,176,32,.14);color:#9a6600;border-color:rgba(255,176,32,.35)}

/* ---------- footer actions ---------- */
.article-foot{margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.foot-row{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.foot-tags{display:flex;flex-wrap:wrap;gap:8px}
.share-group{display:flex;align-items:center;gap:8px}
.share-btn{
  width:40px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);color:var(--text-2);
  display:inline-flex;align-items:center;justify-content:center;transition:all var(--t);
}
.share-btn:hover{border-color:var(--brand);color:var(--brand);background:rgba(122,92,255,.06);transform:translateY(-2px)}
.share-btn svg{width:18px;height:18px}
.share-label{font-size:13px;color:var(--text-3);margin-right:4px}

/* ---------- empty state ---------- */
.empty-state{
  border:1px solid var(--line);border-radius:var(--r-card);background:var(--light-2);
  padding:56px 24px;text-align:center;
}
.empty-icon{
  width:64px;height:64px;border-radius:20px;margin:0 auto 18px;display:flex;align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);color:var(--brand);box-shadow:var(--sh1);
}
.empty-icon svg{width:28px;height:28px}
.empty-state h2{font-size:22px;margin-bottom:10px}
.empty-state p{color:var(--text-2);font-size:15px;max-width:460px;margin:0 auto 22px}

/* ---------- related ---------- */
.related{background:var(--light-2);padding:72px 0 88px;border-top:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;flex-wrap:wrap}
.sec-head h2{font-size:30px}
.sec-head p{font-size:14px;color:var(--text-2);margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.rcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  display:flex;flex-direction:column;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.rcard:hover{transform:translateY(-4px);box-shadow:var(--sh2);border-color:rgba(122,92,255,.3)}
.rcard-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--dark-2)}
.rcard-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms ease}
.rcard:hover .rcard-media img{transform:scale(1.04)}
.rcard-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard-body h3{font-size:18px;line-height:1.5}
.rcard-body p{font-size:14px;color:var(--text-2);line-height:1.75}
.rcard-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--text-3);padding-top:6px}

/* ---------- cta band ---------- */
.cta-band{position:relative;background:var(--dark);color:var(--d-text);padding:76px 0;overflow:hidden}
.cta-band::before{
  content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');
  background-size:cover;background-position:center;opacity:.16;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(760px 380px at 18% 10%,rgba(122,92,255,.55),transparent 70%);
}
.cta-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:30px;color:#fff;max-width:560px}
.cta-inner p{color:var(--d-text-2);font-size:15px;margin-top:12px;max-width:560px}
.cta-actions{display:flex;flex-direction:column;align-items:flex-start;gap:12px}
.cta-note{font-size:12px;color:var(--d-text-3);line-height:1.7}

/* ---------- footer ---------- */
.site-footer{background:#0A0B12;color:var(--d-text-2);padding:64px 0 0;border-top:1px solid rgba(255,255,255,.06)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:44px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.9;color:var(--d-text-3);max-width:360px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:var(--d-text-2);font-size:14px}
.footer-col ul li a:hover{color:var(--brand-soft)}
.footer-col ul li span{font-size:14px;color:var(--d-text-3);line-height:1.8}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 28px;display:flex;
  align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--d-text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px;max-width:820px;margin:0 auto}
  .sidebar{position:static;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .sidebar .side-cta{grid-column:1 / -1}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px}
}
@media (max-width:991px){
  .channelbar{display:none}
  .menu-toggle{display:inline-flex}
  .brand-note{display:none}
  .brand-cta{display:none}
  .section{padding:64px 0}
  .article-hero h1{font-size:30px}
  .article-main{padding:44px 0 56px}
  .cta-inner h2{font-size:26px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .article-hero{padding:22px 0 42px}
  .article-hero h1{font-size:26px}
  .article-meta{font-size:13px;gap:8px}
  .prose{font-size:16.5px;line-height:1.9}
  .prose h2{font-size:23px;margin-top:40px}
  .prose h3{font-size:19px}
  .sidebar{grid-template-columns:minmax(0,1fr)}
  .related-grid{grid-template-columns:minmax(0,1fr)}
  .sec-head h2{font-size:24px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;padding-bottom:32px}
  .cta-band{padding:56px 0}
  .cta-inner h2{font-size:22px}
  .foot-row{align-items:flex-start}
}
@media (max-width:480px){
  .logo-text{font-size:15px;max-width:170px;overflow:hidden;text-overflow:ellipsis}
  .article-hero h1{font-size:22px}
  .btn{height:44px;padding:0 18px;font-size:14px}
  .brand-actions{gap:8px}
}

/* roulang page: category2 */
:root{
  --primary:#7A5CFF;
  --primary-deep:#5B3FE0;
  --primary-light:#A08CFF;
  --primary-soft:rgba(122,92,255,.10);
  --primary-line:rgba(122,92,255,.30);
  --accent:#FFB020;
  --accent-soft:rgba(255,176,32,.14);
  --success:#2AD9A5;
  --warn:#FF5C7A;
  --info:#4FA8FF;
  --dark:#0E0F1A;
  --dark-2:#171934;
  --dark-3:#1E2140;
  --bg:#FFFFFF;
  --bg-soft:#F6F6FA;
  --line:#E7E8F0;
  --text:#16182A;
  --text-2:#5B5F73;
  --text-3:#8A8FA3;
  --d-text:#F2F3F7;
  --d-text-2:#A8ACC2;
  --d-text-3:#7C8199;
  --r-card:16px;
  --r-btn:12px;
  --r-hero:24px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(14,15,26,.06);
  --sh2:0 12px 32px rgba(14,15,26,.08);
  --sh3:0 24px 56px rgba(14,15,26,.14);
  --max:1200px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Segoe UI",Roboto,system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-deep)}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--text);line-height:1.35}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
button{font-family:inherit;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:15px}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--soft{background:var(--bg-soft)}
.section--dark{background:var(--dark);color:var(--d-text)}
.section--dark h2,.section--dark h3,.section--dark h4{color:var(--d-text)}
.section--dark p{color:var(--d-text-2)}

/* ============ 顶部品牌行 ============ */
.site-header{position:relative;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.topbar{height:64px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-deep));
  box-shadow:0 8px 20px rgba(122,92,255,.32);
  flex:0 0 auto;
}
.logo-mark svg{width:19px;height:19px}
.logo-text{font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.topbar-actions{display:flex;align-items:center;gap:12px}
.topbar-note{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px 6px 10px;
}
.topbar-note i{width:7px;height:7px;border-radius:50%;background:var(--success);display:inline-block}
.icon-btn{
  width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;
  display:inline-flex;align-items:center;justify-content:center;color:var(--text-2);transition:all .2s ease;
}
.icon-btn:hover{border-color:var(--primary-line);color:var(--primary);background:var(--primary-soft)}
.icon-btn svg{width:18px;height:18px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;align-items:center;justify-content:center}
.nav-toggle svg{width:20px;height:20px}

/* ============ 频道行 ============ */
.channelbar{
  position:sticky;top:0;z-index:55;background:rgba(255,255,255,.94);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
  transition:transform .2s ease,box-shadow .2s ease;
}
.channelbar.is-hidden{transform:translateY(-102%)}
.channelbar-inner{height:52px;display:flex;align-items:center}
.channel-list{display:flex;align-items:center;gap:10px;list-style:none;margin:0;padding:4px 0;overflow-x:auto;scrollbar-width:none;width:100%}
.channel-list::-webkit-scrollbar{display:none}
.channel{
  display:inline-block;white-space:nowrap;padding:7px 16px;border-radius:var(--r-pill);
  font-size:14.5px;font-weight:600;color:var(--text-2);border:1px solid var(--line);background:#fff;
  transition:all .2s ease;
}
.channel:hover{color:var(--primary);border-color:var(--primary-line);background:var(--primary-soft)}
.channel.active{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 6px 18px rgba(122,92,255,.28)}
.channel.active:hover{color:#fff;background:var(--primary-deep)}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(14,15,26,.6);opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility .3s ease;z-index:90;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:288px;max-width:86vw;background:#fff;z-index:100;
  transform:translateX(102%);transition:transform .28s ease;display:flex;flex-direction:column;
  box-shadow:var(--sh3);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--line)}
.drawer-title{font-size:15px;font-weight:700}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#fff;display:inline-flex;align-items:center;justify-content:center;color:var(--text-2)}
.drawer-close svg{width:17px;height:17px}
.drawer-links{list-style:none;margin:0;padding:14px 12px;display:flex;flex-direction:column;gap:4px;overflow-y:auto}
.drawer-links a{
  display:block;padding:12px 14px;border-radius:var(--r-btn);font-size:15px;font-weight:600;color:var(--text-2);
  min-height:44px;line-height:20px;
}
.drawer-links a:hover,.drawer-links a.active{background:var(--primary-soft);color:var(--primary)}
.drawer-foot{margin-top:auto;padding:18px 20px 26px;border-top:1px solid var(--line)}
.drawer-foot p{font-size:12.5px;color:var(--text-3);margin:10px 0 0;line-height:1.7}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .2s ease;text-decoration:none;min-width:44px;
}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(122,92,255,.26)}
.btn-primary:hover{background:var(--primary-deep);color:#fff;transform:translateY(-2px);box-shadow:0 16px 34px rgba(122,92,255,.32)}
.btn-primary:active{transform:translateY(0);box-shadow:0 8px 18px rgba(122,92,255,.24)}
.btn-outline{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary-soft);color:var(--primary-deep);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.18)}
.btn-ghost:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--primary)}
.link-more svg{width:15px;height:15px;transition:transform .2s ease}
.link-more:hover svg{transform:translateX(3px)}

/* ============ 面包屑 ============ */
.crumb{background:var(--dark);padding:14px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.crumb ol{display:flex;align-items:center;gap:8px;list-style:none;margin:0;padding:0;font-size:13.5px;color:var(--d-text-3);flex-wrap:wrap}
.crumb a{color:var(--d-text-2)}
.crumb a:hover{color:#fff}
.crumb li:not(:last-child)::after{content:"/";margin-left:8px;color:rgba(255,255,255,.22)}
.crumb .current{color:var(--d-text)}

/* ============ Hero banner ============ */
.page-hero{
  position:relative;overflow:hidden;background:var(--dark);color:#fff;
  padding:56px 0 60px;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.30;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(122,92,255,.92) 0%,rgba(14,15,26,.86) 58%,rgba(14,15,26,.96) 100%);
}
.page-hero .container{position:relative;z-index:2}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;line-height:1.6;
}
.badge-primary{background:rgba(255,255,255,.16);color:#fff;border:1px solid rgba(255,255,255,.22)}
.badge-soft{background:var(--primary-soft);color:var(--primary-deep);border:1px solid var(--primary-line)}
.badge-accent{background:var(--accent-soft);color:#8A5A00;border:1px solid rgba(255,176,32,.36)}
.page-hero h1{
  color:#fff;font-size:42px;line-height:1.28;margin:18px 0 14px;max-width:20ch;
}
.page-hero .lead{color:var(--d-text-2);font-size:17px;max-width:56ch;margin:0 0 26px}
.hero-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.hero-facts{display:flex;gap:26px;flex-wrap:wrap;margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12)}
.hero-facts div{font-size:13px;color:var(--d-text-2)}
.hero-facts strong{display:block;font-size:22px;color:#fff;font-weight:800;letter-spacing:-.01em}
.compliance-note{font-size:12.5px;color:var(--text-3);line-height:1.7}

/* ============ 内容布局 ============ */
.layout{display:grid;grid-template-columns:minmax(0,780px) 300px;gap:60px;justify-content:center;align-items:start}
.article-body{font-size:17px;line-height:1.9;color:var(--text)}
.article-body .eyebrow{font-size:13px;font-weight:700;color:var(--accent);letter-spacing:.06em;margin-bottom:10px}
.article-body .intro{font-size:19px;line-height:1.85;color:var(--text-2);margin-bottom:1.2em}
.article-body h2{
  position:relative;font-size:30px;margin:72px 0 20px;padding-left:16px;scroll-margin-top:90px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.18em;width:3px;height:1.05em;border-radius:2px;
  background:linear-gradient(180deg,var(--primary),var(--primary-light));
}
.article-body h3{font-size:21px;margin:36px 0 12px;scroll-margin-top:90px}
.article-body p{margin:0 0 1.15em}
.article-body strong{font-weight:600;color:var(--text)}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:0;list-style:none}
.article-body ul li,.article-body ol li{position:relative;padding-left:28px;margin-bottom:10px;color:var(--text-2)}
.article-body ul li::before{
  content:"";position:absolute;left:8px;top:.72em;width:7px;height:7px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 0 4px var(--primary-soft);
}
.article-body ol{counter-reset:item}
.article-body ol li{counter-increment:item}
.article-body ol li::before{
  content:counter(item);position:absolute;left:0;top:.06em;width:20px;height:20px;border-radius:50%;
  background:var(--primary-soft);color:var(--primary-deep);font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;line-height:1;
}
.quote{
  margin:28px 0;padding:20px 22px;border-left:3px solid var(--accent);background:var(--bg-soft);
  border-radius:0 var(--r-card) var(--r-card) 0;color:var(--text-2);font-size:16.5px;
}
.quote p:last-child{margin-bottom:0}
.figure{margin:32px 0}
.figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;box-shadow:var(--sh1)}
.figure figcaption{font-size:13px;color:var(--text-3);text-align:center;margin-top:10px}

/* ============ 侧栏 ============ */
.sidebar{position:sticky;top:80px;display:flex;flex-direction:column;gap:20px}
.side-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh1);
}
.side-card h3{font-size:16px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 span{width:3px;height:14px;border-radius:2px;background:var(--primary);display:inline-block}
.toc{list-style:none;margin:0;padding:0;font-size:14.5px}
.toc li{margin-bottom:2px}
.toc a{
  display:block;padding:8px 10px;border-radius:10px;color:var(--text-2);font-weight:500;
  border-left:2px solid transparent;transition:all .2s ease;
}
.toc a:hover{background:var(--primary-soft);color:var(--primary-deep);border-left-color:var(--primary)}
.side-links{list-style:none;margin:0;padding:0;font-size:14.5px}
.side-links li+li{border-top:1px solid var(--line)}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:11px 2px;color:var(--text-2);font-weight:600;min-height:44px}
.side-links a:hover{color:var(--primary)}
.side-links svg{width:15px;height:15px;flex:0 0 auto;color:var(--text-3)}
.side-cta{
  border-radius:var(--r-card);padding:24px;color:#fff;position:relative;overflow:hidden;
  background:linear-gradient(140deg,var(--primary) 0%,var(--primary-deep) 100%);
  box-shadow:0 18px 40px rgba(122,92,255,.28);
}
.side-cta h4{color:#fff;font-size:17px;margin-bottom:8px}
.side-cta p{font-size:13.5px;color:rgba(255,255,255,.82);margin:0 0 16px;line-height:1.75}
.side-cta .btn{width:100%}
.side-cta .compliance-note{color:rgba(255,255,255,.6);margin-top:10px;font-size:11.5px}

/* ============ 功能速览（非对称） ============ */
.feature-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:start;margin-top:44px}
.feature-hero{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh2);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.feature-hero:hover{transform:translateY(-4px);box-shadow:var(--sh3);border-color:var(--primary-line)}
.feature-hero img{width:100%;aspect-ratio:4/3;object-fit:cover}
.feature-hero .inner{padding:26px 28px 30px}
.feature-hero h3{font-size:22px;margin-bottom:10px}
.feature-hero p{color:var(--text-2);font-size:15.5px;margin-bottom:16px}
.mini-list{list-style:none;margin:0;padding:0}
.mini-list li{
  display:flex;gap:16px;padding:20px 2px;border-bottom:1px solid var(--line);
}
.mini-list li:first-child{padding-top:6px}
.mini-list .num{
  flex:0 0 auto;width:30px;height:30px;border-radius:9px;background:var(--primary-soft);color:var(--primary-deep);
  font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;
}
.mini-list h4{font-size:16.5px;margin-bottom:4px}
.mini-list p{font-size:14.5px;color:var(--text-2);margin:0;line-height:1.75}

.section-head{max-width:720px}
.section-head .kicker{font-size:13px;font-weight:700;color:var(--primary);letter-spacing:.08em;margin-bottom:12px}
.section-head h2{font-size:32px;margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16.5px;margin:0}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:14px;overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item.open{border-color:var(--primary-line);box-shadow:var(--sh2);border-left:3px solid var(--primary)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
  background:transparent;border:0;padding:20px 24px;font-size:16.5px;font-weight:600;color:var(--text);
  min-height:44px;
}
.faq-q:hover{color:var(--primary-deep)}
.faq-q .chev{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--bg-soft);color:var(--text-2);
  display:flex;align-items:center;justify-content:center;transition:transform .25s ease,background .25s ease,color .25s ease;
}
.faq-q .chev svg{width:14px;height:14px}
.faq-item.open .chev{transform:rotate(180deg);background:var(--primary);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a .faq-a-inner{padding:0 24px 22px;font-size:15.5px;color:var(--text-2);line-height:1.85;border-top:1px solid var(--line);padding-top:16px}

/* ============ CTA 带 ============ */
.cta-band{position:relative;overflow:hidden;background:var(--dark);color:#fff;padding:76px 0}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.18;
}
.cta-band::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(560px 320px at 18% 12%,rgba(122,92,255,.55),transparent 70%),
             linear-gradient(180deg,rgba(14,15,26,.86),rgba(14,15,26,.96));
}
.cta-band .container{position:relative;z-index:2;display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center}
.cta-band h2{color:#fff;font-size:34px;margin-bottom:14px}
.cta-band p{color:var(--d-text-2);font-size:16.5px;max-width:52ch;margin:0}
.cta-actions{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.cta-actions .link-more{color:var(--primary-light)}
.cta-actions .link-more:hover{color:#fff}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark-2);color:var(--d-text-2);padding:64px 0 26px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.09)}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo:hover{color:#fff}
.footer-brand p{color:var(--d-text-3);font-size:14px;line-height:1.85;margin:0;max-width:34ch}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{color:var(--d-text-3);margin-bottom:9px;line-height:1.7}
.footer-col a{color:var(--d-text-2)}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:22px;font-size:13px;color:var(--d-text-3)}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  .page-hero h1{font-size:40px}
}
@media (max-width:1199px){
  .layout{grid-template-columns:minmax(0,1fr) 280px;gap:40px}
  .article-body h2{font-size:28px}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .nav-toggle{display:inline-flex}
  .topbar-note{display:none}
  .layout{grid-template-columns:minmax(0,1fr);gap:36px}
  .sidebar{position:static;top:auto}
  .feature-grid{grid-template-columns:1fr;gap:28px}
  .cta-band .container{grid-template-columns:1fr;gap:26px}
  .cta-actions{flex-direction:row;align-items:center;flex-wrap:wrap;gap:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-hero h1{font-size:32px}
  .article-body h2{font-size:26px;margin-top:56px}
  .article-body{font-size:16.5px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:48px 0}
  .page-hero{padding:40px 0 46px}
  .page-hero h1{font-size:28px;max-width:none}
  .page-hero .lead{font-size:15.5px}
  .section-head h2{font-size:25px}
  .article-body h2{font-size:23px}
  .article-body h3{font-size:19px}
  .article-body .intro{font-size:17.5px}
  .cta-band h2{font-size:26px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .hero-facts{gap:18px}
  .hero-facts strong{font-size:19px}
  .faq-q{padding:16px 18px;font-size:15.5px}
  .faq-a .faq-a-inner{padding:14px 18px 18px}
}
@media (max-width:480px){
  .logo-text{font-size:15px}
  .icon-btn{display:none}
  .btn{width:100%}
  .hero-actions .link-more{width:auto}
  .cta-actions .btn{width:100%}
  .mini-list li{gap:12px}
}

/* roulang page: category4 */
:root{
  --brand:#7A5CFF;
  --brand-dark:#5B3FE0;
  --brand-light:#A08CFF;
  --accent:#FFB020;
  --success:#2AD9A5;
  --warn:#FF5C7A;
  --info:#4FA8FF;
  --ink:#0E0F1A;
  --surface:#FFFFFF;
  --surface-alt:#F6F6FA;
  --line:#E7E8F0;
  --text:#16182A;
  --text-2:#5B5F73;
  --text-3:#8A8FA3;
  --dark-text:#F2F3F7;
  --dark-text-2:#A8ACC2;
  --dark-text-3:#7C8199;
  --r-card:16px;
  --r-btn:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,15,26,.06);
  --sh-2:0 12px 32px rgba(14,15,26,.08);
  --sh-3:0 24px 56px rgba(14,15,26,.14);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.85;color:var(--text);background:var(--surface);
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.32}
p{margin:0}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--brand-dark)}
ul,ol{margin:0;padding:0;list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);text-transform:uppercase}
h2.section-title{font-size:32px;margin-top:14px}
.section-desc{margin-top:16px;color:var(--text-2);font-size:16.5px;max-width:760px}
.lead{color:var(--text-2);font-size:16.5px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--r-btn);border:1px solid transparent;
  font-size:15.5px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(122,92,255,.26)}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:0 4px 12px rgba(122,92,255,.22)}
.btn-ghost-line{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-ghost-line:hover{background:rgba(122,92,255,.08);color:var(--brand-dark);transform:translateY(-2px)}
.btn-on-dark{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.22);color:#fff}
.btn-on-dark:hover{background:rgba(255,255,255,.18);color:#fff;transform:translateY(-2px)}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.btn:disabled,.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}
.btn-sm{height:40px;padding:0 18px;font-size:14.5px}
.btn-block{width:100%}
.btn.is-loading{pointer-events:none;opacity:.88}
.btn.is-loading::after{
  content:"";width:15px;height:15px;border-radius:50%;
  border:2px solid rgba(255,255,255,.45);border-top-color:#fff;
  animation:spin .7s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand);border-bottom:1px solid transparent;transition:border-color .2s ease,color .2s ease}
.link-arrow:hover{border-color:var(--brand);color:var(--brand-dark)}
.link-arrow svg{width:15px;height:15px;transition:transform .2s ease}
.link-arrow:hover svg{transform:translateX(3px)}

/* ============ 顶部品牌行 ============ */
.site-header{position:relative;z-index:70;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}
.brandbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800;letter-spacing:-.01em}
.logo:hover{color:var(--text)}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
  box-shadow:0 6px 16px rgba(122,92,255,.32);
}
.logo-mark svg{width:19px;height:19px}
.logo-text{font-size:17px;white-space:nowrap}
.brand-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:#fff;padding:0;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
  transition:border-color .2s ease,background-color .2s ease;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .25s ease,opacity .25s ease}
.nav-toggle:hover{border-color:var(--brand-light);background:rgba(122,92,255,.06)}
.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)}

/* ============ 频道行 ============ */
.channelbar{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);
  transition:transform .2s ease,box-shadow .2s ease;
}
.channelbar.is-scrolled{box-shadow:var(--sh-1)}
.channelbar.is-hidden{transform:translateY(-100%)}
.channelbar-inner{display:flex;align-items:center;height:52px}
.channel-list{display:flex;gap:10px;overflow-x:auto;scrollbar-width:none;padding:6px 2px}
.channel-list::-webkit-scrollbar{display:none}
.channel{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border-radius:var(--r-pill);border:1px solid var(--line);background:#fff;
  color:var(--text-2);font-size:14.5px;font-weight:600;white-space:nowrap;
  transition:color .2s ease,background-color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.channel:hover{color:var(--brand);border-color:rgba(122,92,255,.4);background:rgba(122,92,255,.06)}
.channel.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(122,92,255,.28)}
.channel:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ============ 抽屉 ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(14,15,26,.6);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:110}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:312px;max-width:88vw;background:#fff;z-index:120;
  transform:translateX(102%);transition:transform .28s ease;display:flex;flex-direction:column;
  padding:20px;box-shadow:var(--sh-3);
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-head .logo-text{font-size:15.5px}
.drawer-close{width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:#fff;display:grid;place-items:center;flex:none}
.drawer-close svg{width:16px;height:16px;stroke:var(--text-2);stroke-width:2;fill:none;stroke-linecap:round}
.drawer-close:hover{border-color:var(--brand-light);background:rgba(122,92,255,.06)}
.drawer-nav{display:flex;flex-direction:column;gap:4px;padding:18px 0;flex:1;overflow-y:auto}
.drawer-nav a{padding:12px 14px;border-radius:var(--r-btn);color:var(--text-2);font-weight:600;font-size:15.5px}
.drawer-nav a:hover{background:rgba(122,92,255,.07);color:var(--brand)}
.drawer-nav a.active{background:var(--brand);color:#fff}

/* ============ 分类 Hero ============ */
.cat-hero{position:relative;background:var(--ink);color:var(--dark-text);overflow:hidden;padding:38px 0 58px}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;opacity:.4;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(118deg,rgba(14,15,26,.95) 0%,rgba(91,63,224,.8) 58%,rgba(14,15,26,.92) 100%);
}
.cat-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--dark-text-3);margin-bottom:26px}
.breadcrumb a{color:var(--dark-text-2)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{color:var(--dark-text-3)}
.breadcrumb .current{color:var(--dark-text)}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(122,92,255,.22);border:1px solid rgba(160,140,255,.4);color:#EAE5FF;font-size:13px;font-weight:600;
}
.cat-hero h1{font-size:38px;margin-top:18px;max-width:820px;color:#fff;font-weight:800}
.hero-sub{margin-top:16px;color:var(--dark-text-2);font-size:17px;max-width:720px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-note{margin-top:18px;font-size:13.5px;color:var(--dark-text-3)}

/* ============ 疑问方向 ============ */
.split-7-5{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start}
.topic-list{margin-top:32px;border-top:1px solid var(--line)}
.topic-item{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--line)}
.topic-num{flex:none;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:rgba(122,92,255,.1);color:var(--brand);font-weight:700;font-size:14px}
.topic-item h3{font-size:18.5px}
.topic-item p{margin-top:6px;color:var(--text-2);font-size:15.5px}
.visual-card{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--sh-2);
}
.visual-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.visual-body{padding:22px 24px 24px}
.visual-body h3{font-size:18px}
.visual-body p{margin-top:8px;color:var(--text-2);font-size:15px}
.metric-row{display:flex;margin-top:20px;border-top:1px solid var(--line);padding-top:18px}
.metric{flex:1;padding:0 12px;border-left:1px solid var(--line)}
.metric:first-child{border-left:0;padding-left:0}
.metric strong{display:block;font-size:22px;font-weight:800;color:var(--brand);font-variant-numeric:tabular-nums}
.metric span{display:block;margin-top:4px;font-size:12.5px;color:var(--text-3);line-height:1.6}

/* ============ FAQ ============ */
.faq-wrap{max-width:920px;margin:0 auto}
.faq-group{margin-top:44px}
.faq-group:first-of-type{margin-top:36px}
.faq-group-title{display:flex;align-items:center;gap:10px;font-size:20px;margin-bottom:16px}
.faq-group-title::before{content:"";width:3px;height:20px;border-radius:2px;background:var(--brand);flex:none}
.faq-group-title .num{color:var(--accent);font-size:14px;font-weight:700}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-card);background:#fff;margin-bottom:12px;
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;overflow:hidden;
}
.faq-item:hover{border-color:rgba(122,92,255,.36);box-shadow:var(--sh-1)}
.faq-item.open{border-color:rgba(122,92,255,.42);box-shadow:var(--sh-2);background:#FBFAFF;border-left:3px solid var(--brand)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 24px;background:transparent;border:0;text-align:left;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
}
.faq-q:focus-visible{outline:2px solid var(--brand);outline-offset:-3px;border-radius:var(--r-card)}
.faq-icon{flex:none;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;background:rgba(122,92,255,.1);transition:transform .28s ease,background-color .28s ease}
.faq-icon svg{width:14px;height:14px;stroke:var(--brand);stroke-width:2.2;fill:none;stroke-linecap:round;stroke-linejoin:round}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand)}
.faq-item.open .faq-icon svg{stroke:#fff}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a p{padding:0 24px 22px;color:var(--text-2);font-size:15.8px;line-height:1.85}

/* ============ 表单区 ============ */
.ask-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:start}
.ask-form{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:30px;box-shadow:var(--sh-2)}
.field{margin-bottom:20px}
.field label{display:block;font-size:15px;font-weight:600;margin-bottom:8px}
.field .req{color:var(--warn);margin-left:3px}
.field input,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--r-btn);background:#FCFCFE;
  padding:12px 14px;font-size:15.5px;line-height:1.6;color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease,background-color .2s ease;
}
.field input{height:46px;padding:0 14px}
.field textarea{min-height:120px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:hover,.field textarea:hover{border-color:var(--brand-light)}
.field input:focus,.field textarea:focus{
  outline:none;background:#fff;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(122,92,255,.18);
}
.field input.is-invalid,.field textarea.is-invalid{border-color:var(--warn);box-shadow:0 0 0 3px rgba(255,92,122,.14)}
.field-msg{margin-top:6px;font-size:13px;color:var(--warn);min-height:18px;line-height:1.5}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:6px}
.form-note{font-size:13px;color:var(--text-3);line-height:1.65;max-width:340px}
.form-status{margin-top:14px;font-size:14px;color:var(--text-2);min-height:20px}
.form-status.is-ok{color:#149B76;font-weight:600}
.form-status.is-warn{color:var(--warn);font-weight:600}
.ask-side{background:var(--surface-alt);border:1px solid var(--line);border-radius:var(--r-card);padding:28px}
.ask-side h3{font-size:19px}
.ask-side ol{margin-top:18px;counter-reset:side}
.ask-side ol li{position:relative;padding:14px 0 14px 34px;border-bottom:1px solid var(--line);color:var(--text-2);font-size:15.3px}
.ask-side ol li:last-child{border-bottom:0}
.ask-side ol li::before{
  counter-increment:side;content:counter(side);
  position:absolute;left:0;top:16px;width:22px;height:22px;border-radius:7px;
  background:rgba(255,176,32,.18);color:#A26A00;font-size:12.5px;font-weight:700;
  display:grid;place-items:center;
}
.ask-side .side-note{margin-top:20px;padding-top:18px;border-top:1px dashed var(--line);font-size:13px;color:var(--text-3);line-height:1.75}

/* ============ 最终 CTA ============ */
.final-cta{position:relative;background:var(--ink);color:var(--dark-text);overflow:hidden;padding:80px 0}
.final-cta::before{
  content:"";position:absolute;inset:0;opacity:.22;
  background-image:url(/assets/images/backpic/back-3.webp);
  background-size:cover;background-position:center;
}
.final-cta::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 22% 28%,rgba(122,92,255,.42) 0%,rgba(14,15,26,.94) 62%);
}
.final-cta .container{position:relative;z-index:2;text-align:center}
.final-cta h2{font-size:32px;color:#fff}
.final-cta p{margin:16px auto 0;max-width:640px;color:var(--dark-text-2);font-size:16.5px}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;margin-top:32px}
.cta-plain{display:inline-flex;align-items:center;color:var(--dark-text-2);font-weight:600;border-bottom:1px solid rgba(168,172,194,.45);padding-bottom:3px}
.cta-plain:hover{color:#fff;border-color:#fff}
.compliance{margin-top:26px;font-size:13px;color:var(--dark-text-3)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:var(--dark-text-2);padding:64px 0 28px;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-brand p{font-size:14.5px;line-height:1.85;color:var(--dark-text-3);max-width:320px}
.footer-col h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col ul li{font-size:14.5px;color:var(--dark-text-3);line-height:1.9;margin-bottom:8px}
.footer-col ul li a{color:var(--dark-text-2)}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--dark-text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .cat-hero h1{font-size:34px}
  .split-7-5,.ask-grid{grid-template-columns:6fr 6fr;gap:40px}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .channelbar{display:none}
  .nav-toggle{display:flex}
  h2.section-title{font-size:27px}
  .split-7-5,.ask-grid{grid-template-columns:1fr;gap:32px}
  .cat-hero{padding:30px 0 48px}
  .cat-hero h1{font-size:30px}
  .hero-sub{font-size:16px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:52px 0}
  .logo-text{font-size:15px}
  .cat-hero h1{font-size:26px;margin-top:14px}
  h2.section-title{font-size:24px}
  .final-cta h2{font-size:25px}
  .final-cta{padding:60px 0}
  .faq-q{padding:17px 18px;font-size:16px;gap:12px}
  .faq-a p{padding:0 18px 20px}
  .ask-form{padding:22px 20px}
  .ask-side{padding:22px 20px}
  .topic-item{gap:12px}
  .form-actions{flex-direction:column;align-items:stretch}
  .form-note{max-width:none}
  .form-actions .btn{width:100%}
  .metric strong{font-size:19px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:480px){
  .cat-hero h1{font-size:23px}
  .hero-actions .btn{width:100%}
  .metric-row{flex-direction:column;gap:14px}
  .metric{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:12px}
  .metric:first-child{border-top:0;padding-top:0}
}

/* roulang page: category3 */
:root{
  --brand:#7A5CFF;
  --brand-deep:#5B3FE0;
  --brand-soft:#A08CFF;
  --brand-tint:rgba(122,92,255,.09);
  --brand-line:rgba(122,92,255,.30);
  --amber:#FFB020;
  --amber-tint:rgba(255,176,32,.15);
  --success:#2AD9A5;
  --info:#4FA8FF;
  --alert:#FF5C7A;
  --dark:#0E0F1A;
  --ink:#16182A;
  --ink-2:#5B5F73;
  --ink-3:#8A8FA3;
  --on-dark:#F2F3F7;
  --on-dark-2:#A8ACC2;
  --on-dark-3:#7C8199;
  --bg-soft:#F6F6FA;
  --line:#E7E8F0;
  --r-xl:24px;
  --r-lg:16px;
  --r-sm:12px;
  --pill:999px;
  --sh-1:0 1px 2px rgba(14,15,26,.06);
  --sh-2:0 12px 32px rgba(14,15,26,.08);
  --sh-3:0 24px 56px rgba(14,15,26,.14);
  --w:1200px;
  --ease:220ms cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink);
  background:#fff;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
a:hover{color:var(--brand-deep)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.32}
h1{font-size:44px}
h2{font-size:32px}
h3{font-size:21px}
h4{font-size:17px}
p{margin:0}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 18px;border-radius:0 0 12px 0;z-index:200}
.skip-link:focus{left:0;color:#fff}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section-soft{background:var(--bg-soft)}
.section-dark{background:var(--dark);color:var(--on-dark)}
.sec-head{max-width:820px;margin-bottom:40px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-kicker{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--brand-deep);background:var(--brand-tint);border-radius:var(--pill);padding:6px 14px;margin-bottom:16px;letter-spacing:.02em}
.section-dark .sec-kicker{color:#fff;background:rgba(255,255,255,.1)}
.sec-title{position:relative;padding-left:16px;margin-bottom:18px}
.sec-title::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:3px;border-radius:3px;background:var(--brand)}
.section-dark .sec-title::before{background:var(--brand-soft)}
.sec-desc{color:var(--ink-2);font-size:16.5px}
.section-dark .sec-desc{color:var(--on-dark-2)}
.sec-head.center .sec-title{padding-left:0}
.sec-head.center .sec-title::before{display:none}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 24px;border-radius:var(--r-sm);font-size:15.5px;font-weight:600;line-height:1;border:1px solid transparent;transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease)}
.btn-sm{height:38px;padding:0 18px;font-size:14px;border-radius:10px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(122,92,255,.26)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(122,92,255,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(122,92,255,.28)}
.btn-outline{background:transparent;border-color:var(--brand);color:var(--brand)}
.btn-outline:hover{background:var(--brand-tint);color:var(--brand-deep);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none!important;box-shadow:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--brand);position:relative}
.link-arrow::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.link-arrow:hover::after{transform:scaleX(1)}
.link-arrow svg{width:15px;height:15px;transition:transform var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}
.text-link{font-weight:600;color:var(--brand);border-bottom:1px dashed var(--brand-line);padding-bottom:2px}
.text-link:hover{border-bottom-style:solid}
.section-dark .text-link{color:var(--brand-soft);border-bottom-color:rgba(160,140,255,.5)}
.compliance-note{font-size:13px;color:var(--ink-3);line-height:1.7}
.section-dark .compliance-note{color:var(--on-dark-3)}

/* 品牌行 */
.site-header{position:relative;z-index:80}
.brandbar{background:#fff;border-bottom:1px solid var(--line)}
.brandbar-inner{height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;letter-spacing:-.01em}
.logo:hover{color:var(--brand-deep)}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);display:inline-flex;align-items:center;justify-content:center;box-shadow:0 6px 16px rgba(122,92,255,.3);flex:none}
.logo-mark svg{width:19px;height:19px}
.logo-text{font-size:17.5px;white-space:nowrap}
.brandbar-right{display:flex;align-items:center;gap:12px}
.brand-tagline{font-size:13.5px;color:var(--ink-3);margin-right:6px}
.hamburger{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.hamburger span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:background var(--ease)}
.hamburger:hover span{background:var(--brand)}

/* 频道行 */
.channelbar{position:sticky;top:0;z-index:70;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line);transition:transform 200ms ease}
.channelbar.is-hidden{transform:translateY(-104%)}
.channelbar-inner{height:52px;display:flex;align-items:center}
.channel-list{display:flex;align-items:center;gap:10px;overflow-x:auto;scrollbar-width:none;width:100%;padding:6px 0}
.channel-list::-webkit-scrollbar{display:none}
.channel{display:inline-flex;align-items:center;height:36px;padding:0 18px;border-radius:var(--pill);font-size:14.5px;font-weight:600;color:var(--ink-2);background:#fff;border:1px solid var(--line);white-space:nowrap;transition:all var(--ease)}
.channel:hover{color:var(--brand-deep);background:var(--brand-tint);border-color:var(--brand-line)}
.channel.active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(122,92,255,.28)}

/* 抽屉 */
.drawer{position:fixed;top:0;right:0;width:288px;max-width:86vw;height:100%;background:#fff;z-index:120;transform:translateX(100%);transition:transform 280ms cubic-bezier(.22,.61,.36,1);display:flex;flex-direction:column;padding:20px;box-shadow:var(--sh-3)}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.drawer-head .logo-text{font-size:15.5px;font-weight:800;white-space:normal;line-height:1.4}
.drawer-close{width:44px;height:44px;border-radius:12px;border:1px solid var(--line);font-size:20px;line-height:1;display:flex;align-items:center;justify-content:center;color:var(--ink-2)}
.drawer-close:hover{color:var(--brand);border-color:var(--brand-line);background:var(--brand-tint)}
.drawer-list{margin-top:18px;display:flex;flex-direction:column;gap:6px}
.drawer-list a{display:flex;align-items:center;min-height:46px;padding:0 14px;border-radius:12px;font-weight:600;color:var(--ink-2);font-size:15.5px}
.drawer-list a:hover{background:var(--brand-tint);color:var(--brand-deep)}
.drawer-list a.active{background:var(--brand);color:#fff}
.drawer-cta{margin-top:20px;width:100%}
.drawer-mask{position:fixed;inset:0;background:rgba(14,15,26,.6);opacity:0;visibility:hidden;transition:opacity 280ms ease,visibility 280ms ease;z-index:110}
.drawer-mask.show{opacity:1;visibility:visible}

/* 面包屑 */
.crumb-strip{background:var(--dark);color:var(--on-dark-3)}
.crumb-inner{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13.5px;padding:12px 0}
.crumb-inner a{color:var(--on-dark-2)}
.crumb-inner a:hover{color:#fff}
.crumb-inner .sep{color:var(--on-dark-3);opacity:.7}
.crumb-inner .cur{color:#fff;font-weight:600}

/* 分类 Hero */
.page-hero{position:relative;background:var(--dark);color:var(--on-dark);overflow:hidden;padding:56px 0 64px}
.page-hero .bg-img{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;opacity:.36}
.page-hero .bg-mask{position:absolute;inset:0;background:linear-gradient(112deg,rgba(14,15,26,.95) 10%,rgba(70,48,190,.74) 62%,rgba(122,92,255,.52) 100%)}
.page-hero .container{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.04em;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:var(--pill);padding:6px 14px;margin-bottom:18px;color:#fff}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--amber);display:inline-block}
.page-hero h1{font-size:42px;font-weight:800;max-width:820px;margin-bottom:16px}
.hero-sub{font-size:17px;color:var(--on-dark-2);max-width:660px;margin-bottom:24px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags span{display:inline-flex;align-items:center;height:32px;padding:0 15px;border-radius:var(--pill);font-size:13.5px;font-weight:600;color:#fff;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16)}
.hero-tags span.amber{background:var(--amber-tint);border-color:rgba(255,176,32,.4);color:#FFD58A}

/* 对照区 */
.compare-wrap{display:grid;grid-template-columns:1fr 84px 1fr;align-items:start;gap:0}
.compare-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-1);overflow:hidden;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:var(--brand-line)}
.compare-card .card-figure{aspect-ratio:16/7;overflow:hidden;background:var(--bg-soft)}
.compare-card .card-figure img{width:100%;height:100%;object-fit:cover}
.compare-card .card-body{padding:26px}
.card-flag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:700;padding:5px 13px;border-radius:var(--pill);margin-bottom:14px}
.flag-brand{background:var(--brand-tint);color:var(--brand-deep)}
.flag-warn{background:var(--amber-tint);color:#9A6400}
.compare-card h3{margin-bottom:10px}
.compare-card .card-lead{color:var(--ink-2);font-size:15px;margin-bottom:18px}
.compare-list li{display:flex;gap:12px;padding:12px 0;border-top:1px solid var(--line);font-size:15.5px;color:var(--ink-2)}
.compare-list li:first-child{border-top:0}
.compare-list .num{flex:none;width:24px;height:24px;border-radius:8px;background:var(--brand-tint);color:var(--brand-deep);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:5px}
.compare-card.warn .num{background:var(--amber-tint);color:#9A6400}
.compare-axis{position:relative;display:flex;align-items:center;justify-content:center;height:100%;min-height:280px}
.compare-axis::before{content:"";position:absolute;top:12px;bottom:12px;width:2px;border-radius:2px;background:linear-gradient(180deg,rgba(122,92,255,0) 0%,var(--brand) 22%,var(--brand) 78%,rgba(122,92,255,0) 100%)}
.compare-axis .axis-dot{position:relative;z-index:1;width:46px;height:46px;border-radius:50%;background:#fff;border:2px solid var(--brand);color:var(--brand-deep);font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(122,92,255,.25)}

/* 步骤条 */
.steps-band{background:var(--dark);color:var(--on-dark);position:relative;overflow:hidden}
.steps-band .bg-img{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;opacity:.22}
.steps-band .bg-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(14,15,26,.92),rgba(14,15,26,.96))}
.steps-band .container{position:relative;z-index:2}
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:38px}
.step{position:relative;padding:24px 20px;border-radius:var(--r-lg);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);transition:all var(--ease)}
.step:hover{background:rgba(122,92,255,.16);border-color:rgba(160,140,255,.5);transform:translateY(-4px)}
.step .step-idx{font-size:13px;font-weight:700;color:var(--amber);letter-spacing:.08em;margin-bottom:10px;display:block}
.step h3{font-size:17px;color:#fff;margin-bottom:8px}
.step p{font-size:14.5px;color:var(--on-dark-2);line-height:1.75}
.step::after{content:"";position:absolute;right:-11px;top:50px;width:16px;height:2px;background:rgba(160,140,255,.4)}
.steps .step:last-child::after{display:none}

/* 编号清单 */
.checklist{margin-top:36px;border-top:1px solid var(--line)}
.checklist li{display:grid;grid-template-columns:70px 1fr auto;gap:18px;align-items:center;padding:22px 4px;border-bottom:1px solid var(--line);transition:background var(--ease)}
.checklist li:hover{background:var(--brand-tint)}
.checklist .cn-num{font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.06em}
.checklist .cl-title{font-size:17px;font-weight:600;color:var(--ink);margin-bottom:4px}
.checklist .cl-desc{font-size:14.5px;color:var(--ink-2)}
.badge{display:inline-flex;align-items:center;height:28px;padding:0 13px;border-radius:var(--pill);font-size:13px;font-weight:600;background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line);white-space:nowrap}
.badge-brand{background:var(--brand-tint);color:var(--brand-deep);border-color:var(--brand-line)}
.badge-amber{background:var(--amber-tint);color:#9A6400;border-color:rgba(255,176,32,.4)}
.badge-success{background:rgba(42,217,165,.14);color:#0E8A67;border-color:rgba(42,217,165,.4)}

/* 适用情况卡片 */
.fit-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:36px}
.fit-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--sh-1);transition:all var(--ease)}
.fit-card:hover{transform:translateY(-4px);border-color:var(--brand-line);box-shadow:var(--sh-2)}
.fit-icon{width:44px;height:44px;border-radius:12px;background:var(--brand-tint);color:var(--brand-deep);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.fit-icon svg{width:21px;height:21px}
.fit-card h3{font-size:17.5px;margin-bottom:8px}
.fit-card p{font-size:14.5px;color:var(--ink-2);line-height:1.8}

/* FAQ */
.faq-layout{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-aside{position:sticky;top:84px}
.faq-aside .sec-desc{margin-top:14px}
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease)}
.faq-item.open{border-color:var(--brand-line);box-shadow:var(--sh-2)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;padding:22px 24px;font-size:16.5px;font-weight:600;color:var(--ink)}
.faq-item.open .faq-q{border-left:3px solid var(--brand);padding-left:21px;background:var(--brand-tint);color:var(--brand-deep)}
.faq-q .chev{width:26px;height:26px;flex:none;border-radius:50%;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;transition:transform var(--ease),background var(--ease)}
.faq-q .chev svg{width:13px;height:13px}
.faq-item.open .chev{transform:rotate(180deg);background:var(--brand);border-color:var(--brand)}
.faq-item.open .chev svg path{stroke:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height 320ms ease}
.faq-a p{padding:0 24px 24px;font-size:15.5px;color:var(--ink-2);line-height:1.85}

/* CTA */
.cta-band{background:var(--dark);color:var(--on-dark);position:relative;overflow:hidden}
.cta-band .bg-img{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.2}
.cta-band .bg-glow{position:absolute;inset:0;background:radial-gradient(620px 320px at 78% 20%,rgba(122,92,255,.5),rgba(14,15,26,0) 70%)}
.cta-band .container{position:relative;z-index:2}
.cta-inner{display:grid;grid-template-columns:1.35fr 1fr;gap:48px;align-items:center;padding:72px 0}
.cta-inner h2{font-size:32px;margin-bottom:16px;color:#fff}
.cta-inner p{color:var(--on-dark-2);font-size:16px;max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-bottom:16px}
.cta-side{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-lg);padding:28px}
.cta-side h3{font-size:17.5px;color:#fff;margin-bottom:14px}
.cta-side ul li{display:flex;gap:10px;font-size:14.5px;color:var(--on-dark-2);padding:9px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.cta-side ul li:last-child{border-bottom:0}
.cta-side ul li i{width:6px;height:6px;border-radius:50%;background:var(--brand-soft);flex:none;margin-top:11px;display:inline-block}

/* 页脚 */
.site-footer{background:#0A0B12;color:var(--on-dark-2);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo:hover{color:var(--brand-soft)}
.footer-brand p{font-size:14px;line-height:1.85;color:var(--on-dark-3);max-width:340px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px;font-weight:700}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul li{font-size:14px;color:var(--on-dark-3);line-height:1.7}
.footer-col ul li a{color:var(--on-dark-2);font-size:14px}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;padding:22px 0 28px;font-size:13px;color:var(--on-dark-3)}

/* 响应式 */
@media (max-width:1199px){
  h1{font-size:38px}
  .page-hero h1{font-size:36px}
  .steps{grid-template-columns:repeat(3,1fr)}
  .step:nth-child(3)::after{display:none}
  .fit-grid{grid-template-columns:repeat(2,1fr)}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
}
@media (max-width:991px){
  .section{padding:64px 0}
  .brand-tagline{display:none}
  .hamburger{display:flex}
  .brand-cta{display:none}
  .compare-wrap{grid-template-columns:1fr;gap:22px}
  .compare-axis{min-height:auto;height:64px}
  .compare-axis::before{top:0;bottom:0;width:2px}
  .cta-inner{grid-template-columns:1fr;gap:32px;padding:56px 0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none}
  .checklist li{grid-template-columns:52px 1fr;gap:14px}
  .checklist li .badge{grid-column:2;justify-self:start;margin-top:8px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 18px}
  .section{padding:48px 0}
  h1{font-size:30px}
  h2{font-size:25px}
  .page-hero{padding:40px 0 48px}
  .page-hero h1{font-size:29px}
  .hero-sub{font-size:15.5px}
  .sec-title{margin-bottom:14px}
  .steps{grid-template-columns:1fr}
  .fit-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column}
  .logo-text{font-size:15.5px;white-space:normal;line-height:1.35;max-width:210px}
  .compare-card .card-body{padding:20px}
  .faq-q{padding:18px 18px;font-size:15.5px}
  .faq-item.open .faq-q{padding-left:15px}
  .faq-a p{padding:0 18px 20px}
}
@media (max-width:480px){
  .brandbar-inner{height:60px}
  .channelbar-inner{height:48px}
  .btn{width:100%}
  .cta-actions .btn{width:100%}
  .link-arrow{width:auto}
  .hero-tags span{height:30px;padding:0 12px;font-size:12.5px}
  .checklist li{grid-template-columns:1fr;gap:6px}
  .checklist .badge{grid-column:1}
}