/* roulang page: index */
:root{
  --bg-0:#0B0618;
  --bg-1:#170E2E;
  --surface:#171030;
  --surface-2:#1E1640;
  --surface-3:#241A4A;
  --primary:#7B5CFF;
  --energy:#FF7A45;
  --cyan:#3FE0C8;
  --text:#F2EFFB;
  --text-2:#B9B0D6;
  --text-3:#7C7395;
  --line:rgba(123,92,255,.18);
  --line-soft:rgba(255,255,255,.08);
  --r-sm:8px;
  --r-md:16px;
  --r-lg:24px;
  --shadow-1:inset 0 1px 0 rgba(255,255,255,.04), 0 12px 32px rgba(0,0,0,.45);
  --shadow-2:0 16px 40px rgba(123,92,255,.22);
  --ease:180ms ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.9;
  color:var(--text);
  background:linear-gradient(180deg,var(--bg-0) 0%,var(--bg-1) 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255,255,255,.34), transparent 100%),
    radial-gradient(1px 1px at 32% 62%, rgba(255,255,255,.22), transparent 100%),
    radial-gradient(2px 2px at 58% 26%, rgba(255,255,255,.30), transparent 100%),
    radial-gradient(1px 1px at 76% 74%, rgba(255,255,255,.20), transparent 100%),
    radial-gradient(1px 1px at 88% 38%, rgba(255,255,255,.26), transparent 100%),
    radial-gradient(1px 1px at 46% 88%, rgba(255,255,255,.16), transparent 100%),
    radial-gradient(2px 2px at 68% 8%, rgba(255,255,255,.18), transparent 100%);
  opacity:.9;
}
img{max-width:100%;display:block;border-radius:var(--r-sm)}
a{color:inherit;text-decoration:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;line-height:1.35}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--energy);outline-offset:2px;border-radius:6px}
::selection{background:rgba(123,92,255,.45)}

/* ---------- 布局骨架 ---------- */
.app{position:relative;z-index:1}
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:240px;
  display:flex;flex-direction:column;
  padding:28px 20px 22px;
  background:linear-gradient(180deg,rgba(23,16,48,.96),rgba(11,6,24,.98));
  border-right:1px solid var(--line);
  z-index:60;
}
.main{margin-left:240px;min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}
section{position:relative}
.section-pad{padding:104px 0}
.section-pad-sm{padding:80px 0}

/* ---------- 品牌与导航 ---------- */
.brand{display:flex;align-items:center;gap:12px;padding:0 6px 26px;border-bottom:1px solid var(--line-soft)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),#4a33c9);
  color:#fff;font-weight:800;font-size:19px;
  box-shadow:0 8px 20px rgba(123,92,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16.5px;font-weight:800;letter-spacing:.01em}
.brand-text em{font-style:normal;font-size:13px;color:var(--text-3);letter-spacing:.14em}
.nav-list{display:flex;flex-direction:column;gap:4px;margin-top:22px;flex:1 1 auto}
.nav-item{
  position:relative;display:flex;align-items:center;
  min-height:46px;padding:0 14px;border-radius:10px;
  font-size:15.5px;color:var(--text-2);
  border:1px solid transparent;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.nav-item:hover{color:var(--text);border-color:var(--line);background:rgba(123,92,255,.08)}
.nav-item.is-active{
  color:var(--text);background:var(--surface-2);border-color:var(--line);
}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:2px;background:var(--energy);
}
.nav-side-cta{margin:18px 0 16px}
.nav-foot{border-top:1px solid var(--line-soft);padding-top:16px;font-size:12.5px;line-height:1.75;color:var(--text-3)}
.nav-foot p{margin:0 0 4px}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;
  align-items:center;justify-content:space-between;
  padding:0 18px;z-index:70;
  background:rgba(11,6,24,.94);
  border-bottom:1px solid var(--line);
}
.topbar .brand-mini{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px}
.topbar .brand-mini .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:15px}
.burger{
  width:44px;height:44px;border-radius:10px;background:transparent;
  border:1px solid var(--line);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:border-color var(--ease)
}
.burger:hover{border-color:var(--primary)}
.burger span{display:block;width:19px;height:2px;border-radius:2px;background:var(--text)}
.mask{
  position:fixed;inset:0;background:rgba(11,6,24,.72);
  opacity:0;visibility:hidden;transition:opacity var(--ease);z-index:80;
}
.mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:340px;
  background:linear-gradient(180deg,#1A1236,#0E0820);
  border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform 220ms ease-out;
  z-index:90;display:flex;flex-direction:column;padding:24px 20px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .nav-item{font-size:17px;min-height:56px}
.drawer-close{
  align-self:flex-end;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:transparent;cursor:pointer;margin-bottom:12px;color:var(--text-2)
}
.drawer .drawer-cta{margin-top:auto;padding-top:24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;
  font-size:15.5px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease),border-color var(--ease);
}
.btn-primary{background:var(--energy);color:#1A0E06;box-shadow:0 10px 26px rgba(255,122,69,.28)}
.btn-primary:hover{background:#FF8F61;transform:translateY(-2px);box-shadow:0 16px 34px rgba(255,122,69,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{background:transparent;border-color:var(--primary);color:#C4B4FF}
.btn-secondary:hover{background:rgba(123,92,255,.14);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-2);padding:0 6px;height:48px}
.btn-ghost:hover{color:var(--text);text-decoration:underline;text-underline-offset:6px}
.btn-block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- 徽章与标签 ---------- */
.badge,.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:999px;font-size:12.5px;letter-spacing:.06em;
  border:1px solid rgba(63,224,200,.45);
  background:rgba(63,224,200,.12);color:#8DF2E1;
}
.tag{background:rgba(123,92,255,.14);border-color:var(--line);color:#C4B4FF;letter-spacing:.02em}
.badge-energy{background:rgba(255,122,69,.14);border-color:rgba(255,122,69,.5);color:#FFB08C}
.badge-rec{background:var(--energy);border-color:var(--energy);color:#1A0E06;font-weight:800}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.section-head h2{font-size:32px;max-width:760px}
.section-head .eyebrow{font-size:12.5px;letter-spacing:.22em;color:var(--cyan);margin-bottom:10px;display:block}
.section-head p{color:var(--text-2);max-width:640px;margin:10px 0 0}
.link-arrow{color:var(--cyan);font-size:14.5px;font-weight:700;display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease),color var(--ease)}
.link-arrow::after{content:"→";transition:transform var(--ease)}
.link-arrow:hover{color:#7FF3E2;gap:10px}

/* ---------- Hero ---------- */
.hero{padding:64px 0 72px;border-bottom:1px solid var(--line-soft);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:24px;align-items:center}
.hero-copy{grid-column:span 6}
.hero-copy h1{font-size:48px;line-height:1.24;margin:18px 0 20px}
.hero-sub{color:var(--text-2);font-size:17px;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0 30px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;border-top:1px solid var(--line-soft);padding-top:20px}
.hero-stat strong{display:block;font-size:24px;font-weight:800;color:var(--text)}
.hero-stat span{font-size:13px;color:var(--text-3);letter-spacing:.08em}
.hero-media{grid-column:span 6;position:relative}
.hero-media img{
  width:100%;height:440px;object-fit:cover;border-radius:var(--r-lg);
  clip-path:polygon(0 0,100% 6%,100% 100%,0 94%);
  border:1px solid var(--line);
}
.hero-media::after{
  content:"";position:absolute;inset:0;border-radius:var(--r-lg);pointer-events:none;
  background:linear-gradient(200deg,rgba(123,92,255,.22),rgba(11,6,24,.6) 62%);
  clip-path:polygon(0 0,100% 6%,100% 100%,0 94%);
}
.hero-media .media-note{
  position:absolute;left:20px;bottom:26px;z-index:2;
  background:rgba(11,6,24,.78);border:1px solid var(--line);
  border-radius:12px;padding:12px 16px;font-size:13.5px;color:var(--text-2);
}

/* ---------- 时间线 ---------- */
.timeline{border-left:1px dashed rgba(123,92,255,.35);margin-left:90px}
.tl-item{position:relative;display:grid;grid-template-columns:90px 1fr;gap:0;margin-left:-90px;padding-bottom:26px}
.tl-time{font-size:15px;font-weight:800;color:var(--text-2);padding-top:22px}
.tl-card{
  position:relative;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:22px 26px;box-shadow:var(--shadow-1);
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.tl-card:hover{border-color:var(--primary);box-shadow:var(--shadow-2);transform:translateY(-2px)}
.tl-card::before{
  content:"";position:absolute;left:-1px;top:28px;width:10px;height:10px;border-radius:50%;
  background:var(--primary);transform:translateX(-50%);
}
.tl-card .tl-title{font-size:19px;font-weight:800;margin:0 0 6px}
.tl-card .tl-desc{color:var(--text-2);font-size:15px;margin:0}
.tl-item.is-now .tl-card{border-color:var(--energy);box-shadow:0 0 0 6px rgba(255,122,69,.12),var(--shadow-2)}
.tl-item.is-now .tl-card::before{background:var(--energy);box-shadow:0 0 0 6px rgba(255,122,69,.28)}
.tl-item.is-now .tl-time{color:var(--energy)}

/* ---------- 亮点错位网格 ---------- */
.hl-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:24px}
.hl-main{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-1);
  transition:border-color var(--ease),transform var(--ease)
}
.hl-main:hover{border-color:var(--primary);transform:translateY(-3px)}
.hl-main img{width:100%;height:268px;object-fit:cover;border-radius:0}
.hl-main .hl-body{padding:26px 28px}
.hl-main h3{font-size:24px;margin:12px 0 10px}
.hl-main p{color:var(--text-2);font-size:15.5px;margin:0}
.hl-side{display:grid;grid-template-columns:1fr;gap:18px}
.hl-card{
  display:flex;gap:16px;align-items:center;background:var(--surface-2);
  border:1px solid var(--line);border-radius:var(--r-md);padding:18px;
  transition:border-color var(--ease),transform var(--ease)
}
.hl-card:hover{border-color:var(--primary);transform:translateY(-2px)}
.hl-card img{width:64px;height:64px;flex:0 0 64px;object-fit:cover;border-radius:12px}
.hl-card h4{font-size:16.5px;margin:0 0 4px}
.hl-card .role{font-size:13px;color:var(--cyan);display:block;margin-bottom:4px}
.hl-card p{font-size:14px;color:var(--text-2);margin:0}

/* ---------- 票种对比 ---------- */
.ticket-wrap{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:var(--surface)}
.tt-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr}
.tt-cell{padding:16px 20px;border-bottom:1px solid var(--line-soft);font-size:15px;display:flex;align-items:center;gap:8px}
.tt-head .tt-cell{
  position:sticky;top:0;z-index:3;background:var(--surface-3);
  font-weight:800;font-size:16px;border-bottom:1px solid var(--line);
}
.tt-label{color:var(--text-2);font-size:14.5px}
.tt-col.is-rec{background:rgba(255,122,69,.07);border-left:1px solid rgba(255,122,69,.35);border-right:1px solid rgba(255,122,69,.35)}
.tt-head .tt-col.is-rec{background:rgba(255,122,69,.16)}
.tt-grid .tt-cell:first-child{border-right:1px solid var(--line-soft)}
.tt-yes{color:var(--cyan);font-weight:800}
.tt-no{color:var(--text-3)}
.ticket-cards{display:none}

/* ---------- 报名表单 ---------- */
.signup{background:linear-gradient(180deg,rgba(11,6,24,.9),rgba(23,16,48,.9));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.signup-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.signup-list{display:flex;flex-direction:column;gap:16px;margin-top:26px}
.signup-list li{display:flex;gap:12px;color:var(--text-2);font-size:15.5px}
.signup-list li::before{content:"✓";color:var(--cyan);font-weight:800}
.form-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px;box-shadow:var(--shadow-1)
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;color:var(--text-3);letter-spacing:.06em;margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;background:var(--surface-2);border:1px solid var(--line);
  border-radius:10px;min-height:48px;padding:10px 14px;font-size:15.5px;
  transition:border-color var(--ease),background var(--ease)
}
.field textarea{min-height:96px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--energy);outline:none;background:#231947}
.field input::placeholder,.field textarea::placeholder{color:#665E80}
.form-hint{font-size:13px;color:var(--text-3);margin-top:12px}
.form-msg{font-size:14px;color:var(--cyan);margin-top:12px;min-height:20px}

/* ---------- 服务保障 ---------- */
.svc-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}
.svc-list{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.svc-item{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;transition:border-color var(--ease),transform var(--ease)}
.svc-item:hover{border-color:var(--primary);transform:translateY(-2px)}
.svc-item .ico{
  width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:rgba(123,92,255,.16);color:#C4B4FF;font-weight:800;margin-bottom:14px;font-size:15px
}
.svc-item h3{font-size:17px;margin-bottom:8px}
.svc-item p{font-size:14.5px;color:var(--text-2);margin:0}
.quote-strip{
  margin-top:36px;border:1px solid var(--line);border-left:3px solid var(--primary);
  border-radius:0 var(--r-md) var(--r-md) 0;padding:22px 26px;background:rgba(30,22,64,.6);
  color:var(--text-2);font-size:15.5px
}
.quote-strip strong{color:var(--text);display:block;margin-top:10px;font-size:14px;font-weight:700}

/* ---------- 资讯列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);overflow:hidden;box-shadow:var(--shadow-1);
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease)
}
.post-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow-2)}
.post-thumb img{width:100%;height:176px;object-fit:cover;border-radius:0}
.post-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.post-body h3{font-size:18px;margin:12px 0 10px;line-height:1.5}
.post-body h3 a:hover{color:#C4B4FF}
.post-sum{color:var(--text-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0 0 18px}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line-soft);padding-top:14px}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-md);padding:56px 24px;text-align:center;
  background:rgba(30,22,64,.45);color:var(--text-2)
}
.empty-state .empty-ico{
  width:52px;height:52px;border-radius:14px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;
  background:rgba(123,92,255,.16);color:#C4B4FF;font-size:22px
}
.empty-state p{margin:0 0 18px}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line-soft);max-width:920px}
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:22px 44px 22px 4px;position:relative;
  font-size:18px;font-weight:700;transition:color var(--ease)
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"＋";position:absolute;right:8px;top:50%;transform:translateY(-50%);
  color:var(--text-3);font-size:20px;transition:transform var(--ease),color var(--ease)
}
.faq-item[open] summary{color:#C4B4FF}
.faq-item[open] summary::after{content:"－";color:var(--energy)}
.faq-item .faq-body{padding:0 44px 24px 4px;color:var(--text-2);font-size:15.5px;max-width:820px;line-height:1.85}
.faq-item .faq-body p:last-child{margin-bottom:0}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:linear-gradient(120deg,rgba(123,92,255,.2),rgba(255,122,69,.14));
  border:1px solid var(--line);border-radius:var(--r-lg);
  padding:44px 46px;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap
}
.cta-band h2{font-size:28px;margin-bottom:10px}
.cta-band p{color:var(--text-2);margin:0;max-width:620px;font-size:15.5px}
.cta-band .cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:96px;padding:64px 0 28px;background:rgba(11,6,24,.6)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px}
.foot-col h4{font-size:15px;margin-bottom:16px;letter-spacing:.06em;color:var(--text)}
.foot-col p,.foot-col li{font-size:14px;color:var(--text-3);line-height:1.9}
.foot-col ul li a{color:var(--text-2);transition:color var(--ease)}
.foot-col ul li a:hover{color:#C4B4FF}
.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.foot-copy{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line-soft);
  text-align:center;font-size:13px;color:var(--text-3)
}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity 420ms ease-out,transform 420ms ease-out}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{padding:0 32px}
  .hero-copy h1{font-size:42px}
}
@media (max-width:1023px){
  .sidenav{display:none}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .section-pad{padding:72px 0}
  .section-pad-sm{padding:56px 0}
  .hero{padding:44px 0 56px}
  .hero-grid{grid-template-columns:1fr}
  .hero-copy,.hero-media{grid-column:span 1}
  .hero-copy h1{font-size:34px}
  .hero-media img{height:320px;clip-path:polygon(0 0,100% 3%,100% 100%,0 97%)}
  .hero-media::after{clip-path:polygon(0 0,100% 3%,100% 100%,0 97%)}
  .hl-grid{grid-template-columns:1fr}
  .signup-grid{grid-template-columns:1fr;gap:32px}
  .svc-grid{grid-template-columns:1fr;gap:32px}
  .svc-list{grid-template-columns:1fr 1fr}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .tt-grid{grid-template-columns:1.3fr 1fr 1fr 1fr}
  .tt-cell{padding:14px 14px;font-size:14px}
  .section-head h2{font-size:27px}
  .cta-band{padding:34px 28px}
}
@media (max-width:767px){
  .container{padding:0 20px}
  .hero-copy h1{font-size:31px}
  .hero-stats{gap:22px}
  .timeline{margin-left:0;border-left:none}
  .tl-item{grid-template-columns:1fr;margin-left:0;gap:8px}
  .tl-time{padding-top:0;font-size:14px;color:var(--cyan)}
  .tl-card::before{display:none}
  .ticket-wrap{display:none}
  .ticket-cards{display:grid;gap:20px}
  .tc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px}
  .tc-card.is-rec{border-color:var(--energy);box-shadow:0 0 0 4px rgba(255,122,69,.1)}
  .tc-card h3{font-size:19px;margin:10px 0 12px}
  .tc-card ul li{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-bottom:1px solid var(--line-soft);font-size:14.5px;color:var(--text-2)}
  .tc-card ul li:last-child{border-bottom:none}
  .svc-list{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .faq-item summary{font-size:16.5px;padding-right:38px}
  .faq-item .faq-body{padding-right:12px}
  .cta-band{padding:28px 22px;flex-direction:column;align-items:flex-start}
  .cta-band .cta-actions{width:100%}
  .cta-band .btn{width:100%}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .hero-media .media-note{left:14px;bottom:16px;font-size:12.5px}
}
@media (max-width:519px){
  .hero-copy h1{font-size:27px}
  .section-head h2{font-size:23px}
  .foot-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
}

/* roulang page: article */
:root{
  --bg-0:#0B0618;
  --bg-1:#170E2E;
  --surface:#171030;
  --surface-2:#1E1640;
  --surface-3:#241A4A;
  --line:rgba(123,92,255,.18);
  --line-strong:rgba(123,92,255,.42);
  --violet:#7B5CFF;
  --orange:#FF7A45;
  --cyan:#3FE0C8;
  --text:#F2EFFB;
  --text-2:#B9B0D6;
  --text-3:#7C7395;
  --divider:rgba(255,255,255,.08);
  --ink:#1A1230;
  --ink-2:#5C5478;
  --paper:#F7F5FF;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:22px;
  --radius-btn:10px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,.04), 0 12px 32px rgba(0,0,0,.45);
  --shadow-hover:inset 0 1px 0 rgba(255,255,255,.06), 0 16px 40px rgba(123,92,255,.22);
  --ease:180ms ease-out;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  min-height:100vh;
  font-family:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:16.5px;
  line-height:1.9;
  color:var(--text);
  background:
    radial-gradient(1px 1px at 18% 22%, rgba(255,255,255,.34), transparent 100%),
    radial-gradient(1px 1px at 67% 11%, rgba(255,255,255,.22), transparent 100%),
    radial-gradient(2px 2px at 85% 41%, rgba(255,255,255,.28), transparent 100%),
    radial-gradient(1px 1px at 33% 65%, rgba(255,255,255,.24), transparent 100%),
    radial-gradient(1px 1px at 11% 86%, rgba(255,255,255,.18), transparent 100%),
    radial-gradient(2px 2px at 55% 92%, rgba(255,255,255,.16), transparent 100%),
    radial-gradient(1px 1px at 44% 38%, rgba(255,255,255,.20), transparent 100%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
  background-attachment:fixed;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.35;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px;border-radius:4px;}

/* ============ 骨架布局 ============ */
.shell{display:flex;min-height:100vh;align-items:flex-start;}
.sidebar{
  position:sticky;top:0;
  width:240px;flex:0 0 240px;
  height:100vh;
  display:flex;flex-direction:column;
  padding:26px 18px 22px;
  border-right:1px solid var(--divider);
  background:linear-gradient(180deg, rgba(23,16,48,.86) 0%, rgba(11,6,24,.86) 100%);
}
.brand{display:flex;align-items:center;gap:11px;padding:4px 6px 22px;border-bottom:1px solid var(--divider);}
.brand-mark{
  width:38px;height:38px;flex:0 0 38px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:800;color:#200B04;
  background:linear-gradient(135deg,var(--orange),#FFB07A);
  box-shadow:0 8px 20px rgba(255,122,69,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:800;letter-spacing:.02em;}
.brand-text span{font-size:12.5px;color:var(--text-3);letter-spacing:.22em;}
.nav-list{display:flex;flex-direction:column;gap:5px;margin-top:22px;}
.nav-item{
  position:relative;
  display:block;padding:11px 12px 11px 15px;
  font-size:14.5px;color:var(--text-2);
  border:1px solid transparent;border-radius:var(--radius-sm);
  transition:color var(--ease),border-color var(--ease),background var(--ease),transform var(--ease);
}
.nav-item:hover{color:var(--text);border-color:var(--line);background:rgba(123,92,255,.07);transform:translateX(2px);}
.nav-item.is-active{
  color:var(--text);background:var(--surface-2);
  border-color:var(--line);box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
}
.nav-item.is-active::before{
  content:"";position:absolute;left:-1px;top:8px;bottom:8px;width:3px;
  border-radius:3px;background:var(--orange);
}
.side-foot{margin-top:auto;padding:16px 6px 0;border-top:1px solid var(--divider);font-size:12.5px;line-height:1.75;color:var(--text-3);}
.side-foot p{margin:0 0 2px;}

.main-wrap{flex:1;min-width:0;display:flex;flex-direction:column;}

/* ============ 移动端顶部栏 ============ */
.mob-bar{display:none;}
.drawer,.mob-mask{display:none;}

/* ============ 内容容器 ============ */
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 32px;}
.content-area{padding:34px 0 90px;}

/* ============ 面包屑 ============ */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);margin-bottom:22px;
}
.crumb a{color:var(--text-2);transition:color var(--ease);}
.crumb a:hover{color:var(--cyan);}
.crumb .sep{color:rgba(255,255,255,.22);}
.crumb .cur{color:var(--text);font-weight:600;max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ============ 文章头部 ============ */
.article-head{max-width:880px;}
.section-tag{
  display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;letter-spacing:.14em;color:var(--cyan);
  padding:5px 12px;border-radius:999px;
  border:1px solid rgba(63,224,200,.42);background:rgba(63,224,200,.12);
}
.article-head h1{
  margin-top:18px;
  font-size:44px;font-weight:800;line-height:1.28;letter-spacing:-.012em;
  color:var(--text);
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  margin-top:18px;font-size:13.5px;color:var(--text-3);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:rgba(255,255,255,.22);}
.meta-row .badge{
  padding:3px 10px;border-radius:999px;font-size:12.5px;color:var(--cyan);
  background:rgba(63,224,200,.12);border:1px solid rgba(63,224,200,.36);
}
.head-rule{margin:34px 0 0;height:1px;background:var(--divider);}

/* ============ 文章主体分栏 ============ */
.article-grid{display:block;margin-top:34px;}
@media (min-width:1280px){
  .article-grid{display:flex;gap:34px;align-items:flex-start;}
  .article-main{flex:1;min-width:0;}
  .article-aside{flex:0 0 300px;position:sticky;top:32px;}
}

/* ============ 浅色纸面正文 ============ */
.paper{
  max-width:836px;
  background:var(--paper);
  color:var(--ink);
  border-radius:var(--radius-lg);
  padding:44px 48px 50px;
  box-shadow:0 24px 60px rgba(0,0,0,.42);
}
.paper > *:first-child{margin-top:0;}
.paper h2{
  font-size:27px;font-weight:800;color:var(--ink);
  margin:40px 0 16px;padding-left:14px;position:relative;
}
.paper h2::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;width:4px;
  border-radius:3px;background:linear-gradient(180deg,var(--violet),var(--cyan));
}
.paper h3{font-size:20px;font-weight:700;color:var(--ink);margin:30px 0 12px;}
.paper h4{font-size:17.5px;font-weight:700;color:var(--ink);margin:24px 0 10px;}
.paper p{font-size:17px;line-height:1.9;color:#241A46;margin:0 0 1.2em;}
.paper ul,.paper ol{margin:0 0 1.3em;padding-left:1.35em;}
.paper ul{list-style:disc;}
.paper ol{list-style:decimal;}
.paper li{font-size:16.5px;line-height:1.9;color:#241A46;margin:0 0 .5em;}
.paper li::marker{color:var(--violet);}
.paper strong{color:#120C26;font-weight:700;}
.paper a{color:#5B3CE0;text-decoration:underline;text-underline-offset:3px;}
.paper a:hover{color:#8A5CFF;}
.paper blockquote{
  margin:22px 0;padding:14px 20px;
  border-left:3px solid var(--violet);
  background:#EFEBFF;border-radius:0 12px 12px 0;
  color:#3A2F63;
}
.paper blockquote p{margin:0;font-size:16px;color:#3A2F63;}
.paper img{border-radius:12px;margin:22px auto;max-width:100%;height:auto;}
.paper figure{margin:22px 0;}
.paper figcaption{font-size:13px;color:var(--ink-2);text-align:center;margin-top:9px;}
.paper table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15.5px;background:#fff;border-radius:12px;overflow:hidden;}
.paper th,.paper td{border:1px solid #DED7F6;padding:11px 14px;text-align:left;color:#241A46;}
.paper th{background:#EFEBFF;font-weight:700;color:#1A1230;}
.paper tr:nth-child(even) td{background:#FBFAFF;}
.paper code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.92em;background:#EAE5FA;color:#3A2472;
  padding:2px 6px;border-radius:6px;
}
.paper pre{
  background:#EDE9FA;border:1px solid #DED7F6;border-radius:12px;
  padding:16px 18px;overflow:auto;margin:22px 0;
}
.paper pre code{background:none;padding:0;font-size:14px;line-height:1.75;}
.paper hr{border:0;border-top:1px solid #DED7F6;margin:32px 0;}

/* 无内容兜底 */
.empty-box{
  max-width:836px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:60px 40px;text-align:center;box-shadow:var(--shadow-card);
}
.empty-box .empty-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);background:var(--surface-2);
  font-size:24px;color:var(--violet);
}
.empty-box h2{font-size:22px;color:var(--text);}
.empty-box p{margin-top:10px;color:var(--text-2);font-size:15px;}

/* ============ 侧栏 ============ */
.aside-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-md);padding:22px;
  box-shadow:var(--shadow-card);
}
.aside-card + .aside-card{margin-top:18px;}
.aside-card h3{font-size:15px;color:var(--text);letter-spacing:.04em;}
.aside-card .aside-list{margin-top:14px;display:flex;flex-direction:column;gap:2px;}
.aside-card .aside-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 10px;border-radius:var(--radius-sm);font-size:14.5px;color:var(--text-2);
  border:1px solid transparent;transition:all var(--ease);
}
.aside-card .aside-list a:hover{color:var(--text);border-color:var(--line);background:rgba(123,92,255,.08);}
.aside-card .aside-list a span{color:var(--cyan);font-size:13px;}
.aside-cta{background:linear-gradient(160deg,var(--surface-2),var(--surface-3));}
.aside-cta p{font-size:14px;color:var(--text-2);margin-top:10px;line-height:1.8;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:1px solid transparent;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;cursor:pointer;white-space:nowrap;
  transition:transform var(--ease),background var(--ease),border-color var(--ease),color var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--orange);color:#220C03;box-shadow:0 10px 26px rgba(255,122,69,.26);}
.btn-primary:hover{background:#FF9163;transform:translateY(-2px);box-shadow:0 14px 32px rgba(255,122,69,.34);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:#C9BCFF;}
.btn-ghost:hover{background:rgba(123,92,255,.14);border-color:var(--violet);color:#E4DCFF;transform:translateY(-2px);}
.btn-quiet{
  background:transparent;border-color:transparent;color:var(--text-2);
  padding:0 6px;height:44px;text-decoration:underline;text-underline-offset:5px;
}
.btn-quiet:hover{color:var(--cyan);}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none;}

/* ============ 文末入口 ============ */
.end-actions{
  max-width:836px;margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;
  padding:22px 26px;border:1px solid var(--line);border-radius:var(--radius-md);
  background:var(--surface);box-shadow:var(--shadow-card);
}
.end-actions .hint{font-size:13.5px;color:var(--text-3);margin-right:auto;}

/* ============ 相关推荐 ============ */
.related{margin-top:64px;}
.blk-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;}
.blk-head h2{font-size:26px;color:var(--text);}
.blk-head .more{font-size:14px;color:var(--cyan);display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease);}
.blk-head .more:hover{gap:10px;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-md);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow-hover);}
.card .thumb{aspect-ratio:16/10;overflow:hidden;background:var(--surface-2);}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform 400ms ease-out;}
.card:hover .thumb img{transform:scale(1.04);}
.card .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
.card .body h3{font-size:17px;color:var(--text);line-height:1.55;}
.card .body p{margin-top:10px;font-size:14px;color:var(--text-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card .foot{margin-top:16px;padding-top:14px;border-top:1px solid var(--divider);
  display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--text-3);}
.card .foot .go{color:var(--cyan);display:inline-flex;align-items:center;gap:6px;transition:gap var(--ease);}
.card:hover .foot .go{gap:10px;}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:auto;border-top:1px solid var(--divider);
  background:rgba(11,6,24,.72);padding:56px 0 26px;
}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:34px;}
.foot-col h4{font-size:14px;color:var(--text);letter-spacing:.06em;margin-bottom:14px;}
.foot-col p{font-size:13.5px;color:var(--text-3);line-height:1.85;}
.foot-col ul{display:flex;flex-direction:column;gap:9px;}
.foot-col ul a{font-size:13.5px;color:var(--text-2);transition:color var(--ease),padding-left var(--ease);}
.foot-col ul a:hover{color:var(--cyan);padding-left:4px;}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.foot-copy{
  margin-top:38px;padding-top:20px;border-top:1px solid var(--divider);
  text-align:center;font-size:12.5px;color:var(--text-3);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .article-aside{display:none;}
  .paper{max-width:100%;}
  .end-actions{max-width:100%;}
}
@media (max-width:1023px){
  .shell{display:block;}
  .sidebar{display:none;}
  .mob-bar{
    display:flex;align-items:center;justify-content:space-between;
    position:sticky;top:0;z-index:60;height:60px;padding:0 20px;
    background:rgba(11,6,24,.92);border-bottom:1px solid var(--divider);
    backdrop-filter:saturate(140%) blur(6px);
  }
  .mob-brand{display:flex;align-items:center;gap:10px;font-size:15.5px;font-weight:700;color:var(--text);}
  .mob-brand .brand-mark{width:32px;height:32px;flex:0 0 32px;border-radius:9px;font-size:15px;}
  .burger{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
    background:var(--surface-2);color:var(--text);font-size:18px;cursor:pointer;
    display:flex;align-items:center;justify-content:center;transition:all var(--ease);
  }
  .burger:hover{border-color:var(--violet);color:var(--cyan);}
  .mob-mask{
    display:block;position:fixed;inset:0;z-index:70;
    background:rgba(11,6,24,.72);
    opacity:0;visibility:hidden;transition:opacity var(--ease),visibility var(--ease);
  }
  .mob-mask.is-open{opacity:1;visibility:visible;}
  .drawer{
    display:flex;flex-direction:column;
    position:fixed;top:0;right:0;z-index:80;
    width:82vw;max-width:360px;height:100%;
    padding:24px 20px;overflow-y:auto;
    background:linear-gradient(180deg,#170E2E,#0F0920);
    border-left:1px solid var(--line);
    transform:translateX(102%);transition:transform 220ms ease-out;
  }
  .drawer.is-open{transform:translateX(0);}
  .drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
  .drawer .drawer-head strong{font-size:16px;color:var(--text);}
  .drawer .close-btn{
    width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
    background:var(--surface-2);cursor:pointer;font-size:18px;color:var(--text);
  }
  .drawer .nav-list{margin-top:6px;}
  .drawer .nav-item{font-size:17px;line-height:1.3;padding:16px 14px;color:var(--text-2);}
  .drawer .nav-item.is-active{color:var(--text);}
  .drawer .drawer-cta{margin-top:auto;padding-top:24px;}
  .drawer .drawer-cta .btn{width:100%;}
  .container{padding:0 20px;}
  .content-area{padding:24px 0 64px;}
  .article-head h1{font-size:32px;line-height:1.34;}
  .paper{padding:30px 24px 34px;border-radius:var(--radius-md);}
  .paper h2{font-size:22px;margin:32px 0 14px;}
  .paper h3{font-size:18px;}
  .paper p,.paper li{font-size:16px;}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
}
@media (max-width:639px){
  body{font-size:16px;}
  .article-head h1{font-size:28px;}
  .crumb .cur{white-space:normal;max-width:none;}
  .card-grid{grid-template-columns:1fr;}
  .foot-grid{grid-template-columns:1fr;}
  .end-actions{padding:18px 20px;}
  .end-actions .btn{width:100%;}
  .end-actions .hint{margin-right:0;width:100%;}
  .paper{padding:24px 18px 28px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category1 */
:root{
  --purple:#7B5CFF;
  --orange:#FF7A45;
  --cyan:#3FE0C8;
  --bg-1:#0B0618;
  --bg-2:#170E2E;
  --surface:#171030;
  --surface-2:#1E1640;
  --float:#241A4A;
  --text:#F2EFFB;
  --text-2:#B9B0D6;
  --text-3:#7C7395;
  --line:rgba(123,92,255,0.18);
  --line-soft:rgba(255,255,255,0.08);
  --r-sm:8px;
  --r-card:16px;
  --r-lg:22px;
  --r-btn:10px;
  --shadow-card:inset 0 1px 0 rgba(255,255,255,0.04), 0 12px 32px rgba(0,0,0,0.45);
  --shadow-hover:0 16px 40px rgba(123,92,255,0.22);
  --sidebar-w:240px;
  --dur:220ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  font-size:17px;
  line-height:1.9;
  color:var(--text);
  background:linear-gradient(180deg,#0B0618 0%,#170E2E 58%,#0F0921 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--purple)}
button{font-family:inherit}
h1,h2,h3,h4{line-height:1.35;letter-spacing:-0.01em}
:focus-visible{outline:2px solid var(--orange);outline-offset:2px}

/* 星点纹理：全站唯一装饰母题 */
.starfield{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    radial-gradient(circle 1px at 8% 14%, rgba(255,255,255,.38), transparent 100%),
    radial-gradient(circle 1px at 22% 62%, rgba(255,255,255,.20), transparent 100%),
    radial-gradient(circle 1.5px at 37% 26%, rgba(255,255,255,.30), transparent 100%),
    radial-gradient(circle 1px at 52% 78%, rgba(255,255,255,.16), transparent 100%),
    radial-gradient(circle 1.5px at 68% 18%, rgba(255,255,255,.34), transparent 100%),
    radial-gradient(circle 1px at 79% 54%, rgba(255,255,255,.22), transparent 100%),
    radial-gradient(circle 1px at 91% 84%, rgba(255,255,255,.28), transparent 100%),
    radial-gradient(circle 1px at 63% 42%, rgba(255,255,255,.12), transparent 100%),
    radial-gradient(circle 1px at 14% 88%, rgba(255,255,255,.24), transparent 100%),
    radial-gradient(circle 1.5px at 45% 8%, rgba(255,255,255,.30), transparent 100%);
}

/* 容器 */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 32px}

/* 左侧竖向导航 */
.sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;z-index:40;
  display:flex;flex-direction:column;gap:22px;padding:26px 18px 22px;
  background:#0E0820;border-right:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-mark{
  width:36px;height:36px;border-radius:10px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(135deg,#7B5CFF,#FF7A45);
  color:#0B0618;font-weight:800;font-size:17px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;color:var(--text);font-weight:700}
.brand-text em{font-style:normal;font-size:11.5px;color:var(--text-3);letter-spacing:.14em}
.nav-list{display:flex;flex-direction:column;gap:4px}
.nav-item{
  display:flex;align-items:center;height:46px;padding:0 14px;border-radius:10px;
  color:var(--text-2);text-decoration:none;font-size:15.5px;
  border-left:3px solid transparent;
  transition:background var(--dur) ease-out,color var(--dur) ease-out,border-color var(--dur) ease-out;
}
.nav-item:hover{color:var(--text);background:rgba(123,92,255,.08);border-left-color:var(--line)}
.nav-item.is-active{background:var(--surface-2);color:var(--text);border-left-color:var(--orange);font-weight:600}
.side-foot{margin-top:auto;border-top:1px solid var(--line-soft);padding-top:16px;font-size:12.5px;color:var(--text-3);line-height:1.9}
.side-foot p{margin:0}
.side-cta{margin-top:14px;width:100%;height:44px;font-size:14.5px;padding:0 12px}

/* 移动端顶栏与抽屉 */
.topbar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;z-index:50;
  align-items:center;justify-content:space-between;padding:0 18px;
  background:#0B0618;border-bottom:1px solid var(--line);
}
.topbar-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-size:15.5px;font-weight:700}
.topbar-brand .brand-mark{width:32px;height:32px;font-size:15px;border-radius:9px}
.burger{
  width:44px;height:44px;border:1px solid var(--line);border-radius:10px;background:transparent;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
  transition:border-color var(--dur) ease-out,background var(--dur) ease-out;
}
.burger:hover{border-color:var(--purple);background:rgba(123,92,255,.12)}
.burger span{display:block;width:20px;height:2px;border-radius:2px;background:var(--text-2);transition:background var(--dur) ease-out}
.burger:hover span{background:var(--text)}
.drawer{
  position:fixed;top:0;right:0;height:100vh;width:82vw;max-width:360px;z-index:60;
  background:#120A26;border-left:1px solid var(--line);
  padding:24px 20px;display:flex;flex-direction:column;gap:6px;
  transform:translateX(100%);transition:transform 220ms ease-out;
}
.drawer.is-open{transform:translateX(0)}
.drawer .drawer-title{font-size:12.5px;letter-spacing:.16em;color:var(--text-3);margin:4px 0 10px}
.drawer .nav-item{height:56px;font-size:17px;border-left-width:0;border-radius:12px}
.drawer .nav-item.is-active{border-left-color:transparent;box-shadow:inset 3px 0 0 var(--orange)}
.drawer-cta{margin-top:auto;width:100%}
.drawer-mask{
  position:fixed;inset:0;z-index:55;background:rgba(11,6,24,.72);
  opacity:0;visibility:hidden;transition:opacity 220ms ease-out,visibility 220ms;
}
.drawer-mask.is-open{opacity:1;visibility:visible}

/* 主内容 */
.main{position:relative;z-index:1;margin-left:var(--sidebar-w)}

/* 面包屑 */
.crumbs{padding:28px 0 0;font-size:13px;color:var(--text-3)}
.crumbs a{color:var(--text-3);text-decoration:none;transition:color var(--dur) ease-out}
.crumbs a:hover{color:var(--purple)}
.crumbs .sep{margin:0 8px;color:rgba(255,255,255,.2)}
.crumbs .current{color:var(--text-2);font-weight:600}

/* 徽章与标签 */
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;
  font-size:12.5px;line-height:1.7;border:1px solid rgba(63,224,200,.4);
  background:rgba(63,224,200,.12);color:var(--cyan);
}
.badge-warn{border-color:rgba(255,122,69,.42);background:rgba(255,122,69,.14);color:var(--orange)}
.badge-muted{border-color:var(--line-soft);background:rgba(255,255,255,.05);color:var(--text-3)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;text-decoration:none;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--dur) ease-out,color var(--dur) ease-out,border-color var(--dur) ease-out,transform var(--dur) ease-out,box-shadow var(--dur) ease-out;
}
.btn i{font-size:14px;transition:transform var(--dur) ease-out}
.btn:hover i{transform:translateX(2px)}
.btn-primary{background:var(--orange);color:#1A0F08;border-color:var(--orange)}
.btn-primary:hover{background:#FF8F61;transform:translateY(-2px);box-shadow:0 14px 30px rgba(255,122,69,.28)}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-secondary{background:transparent;color:var(--purple);border-color:var(--purple)}
.btn-secondary:hover{background:rgba(123,92,255,.14);transform:translateY(-2px)}
.btn-secondary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text-2);border-color:var(--line)}
.btn-ghost:hover{color:var(--text);border-color:var(--purple);transform:translateY(-2px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}

/* Hero */
.hero-kv{
  position:relative;margin-top:24px;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);min-height:340px;
  background:#120A26 url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  display:flex;align-items:flex-end;
}
.hero-kv::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(104deg,rgba(11,6,24,.95) 0%,rgba(11,6,24,.82) 50%,rgba(11,6,24,.46) 100%);
}
.hero-inner{position:relative;z-index:2;padding:44px;max-width:820px}
.hero-inner h1{font-size:46px;font-weight:800;margin:18px 0 14px;line-height:1.28}
.hero-sub{margin:0 0 26px;font-size:16.5px;color:var(--text-2);max-width:660px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  margin-top:34px;border-top:1px solid var(--line-soft);
}
.hero-stats .stat{padding:18px 22px 0 0;border-right:1px solid var(--line-soft)}
.hero-stats .stat:last-child{border-right:0}
.stat-num{font-size:20px;font-weight:800;color:var(--text);letter-spacing:-0.01em}
.stat-label{font-size:13px;color:var(--text-3)}

/* 板块 */
.section{padding:96px 0}
.section-head{max-width:780px;margin-bottom:40px}
.section-eyebrow{font-size:12.5px;letter-spacing:.16em;color:var(--cyan);margin:0 0 12px}
.section-title{font-size:32px;font-weight:800;margin:0 0 14px}
.section-desc{margin:0;color:var(--text-2);font-size:16.5px}

/* 准备事项 */
.prep-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.prep-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;transition:border-color var(--dur) ease-out,transform var(--dur) ease-out,box-shadow var(--dur) ease-out;
}
.prep-card:hover{border-color:rgba(123,92,255,.5);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.prep-icon{
  width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
  background:rgba(123,92,255,.14);color:var(--purple);font-size:17px;margin-bottom:16px;
}
.prep-card h3{font-size:19px;margin:0 0 8px}
.prep-card p{margin:0;color:var(--text-2);font-size:15.5px;line-height:1.85}

/* 步骤图文交替 */
.steps{border-top:1px solid var(--line-soft)}
.step-row{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:48px;align-items:center;padding:46px 0;border-bottom:1px solid var(--line-soft);
}
.step-media{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.step-media img{width:100%;height:290px;object-fit:cover}
.step-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,6,24,.04) 0%,rgba(11,6,24,.52) 100%);
}
.step-num{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:14px;
  font-size:12.5px;font-weight:700;letter-spacing:.16em;color:var(--orange);
}
.step-num .dot{width:22px;height:22px;border-radius:999px;display:grid;place-items:center;
  border:1px solid rgba(255,122,69,.5);background:rgba(255,122,69,.12);font-size:11px;letter-spacing:0}
.step-copy h3{font-size:24px;font-weight:700;margin:0 0 12px}
.step-copy p{margin:0 0 12px;color:var(--text-2);font-size:16px}
.step-list{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px}
.step-list li{position:relative;padding-left:20px;color:var(--text-2);font-size:15.5px}
.step-list li::before{
  content:"";position:absolute;left:0;top:12px;width:7px;height:7px;border-radius:50%;background:var(--cyan);
}
.step-row.is-reverse .step-media{order:2}
.step-row.is-reverse .step-copy{order:1}

/* 排查清单 */
.trouble-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.trouble-card{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;transition:border-color var(--dur) ease-out,transform var(--dur) ease-out;
}
.trouble-card:hover{border-color:rgba(123,92,255,.45);transform:translateY(-2px)}
.trouble-card h3{font-size:17.5px;margin:0 0 10px;display:flex;align-items:center;gap:10px}
.trouble-card h3 i{color:var(--orange);font-size:15px}
.trouble-card p{margin:0;color:var(--text-2);font-size:15.5px}

/* FAQ */
.faq-wrap{max-width:920px}
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-item:first-child{border-top:1px solid var(--line-soft)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:22px 4px;
  display:flex;align-items:flex-start;justify-content:space-between;gap:18px;
  font-size:17px;font-weight:600;color:var(--text);
  transition:color var(--dur) ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--purple)}
.faq-item[open] summary{color:var(--purple)}
.faq-arrow{flex:none;color:var(--text-3);font-size:14px;transition:transform var(--dur) ease-out}
.faq-item[open] .faq-arrow{transform:rotate(180deg);color:var(--purple)}
.faq-answer{padding:0 4px 24px;max-width:820px;color:var(--text-2);font-size:16px;line-height:1.85}
.faq-answer p{margin:0 0 10px}
.faq-answer p:last-child{margin-bottom:0}

/* CTA 条 */
.cta-band{
  margin:8px 0 0;border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(120deg,#150C2E 0%,#1E1640 100%);
  padding:42px 44px;display:flex;align-items:center;justify-content:space-between;
  gap:32px;flex-wrap:wrap;
}
.cta-band h2{font-size:26px;font-weight:800;margin:0 0 10px}
.cta-band p{margin:0;color:var(--text-2);font-size:16px;max-width:640px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* 页脚 */
.site-footer{margin-top:96px;border-top:1px solid var(--line);background:rgba(10,5,22,.72);padding:56px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{width:32px;height:32px;font-size:15px;border-radius:9px}
.foot-brand strong{color:var(--text)}
.foot-col p{margin:0 0 10px;color:var(--text-3);font-size:14.5px;line-height:1.85}
.foot-col h4{font-size:15px;margin:0 0 16px;color:var(--text)}
.foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:11px}
.foot-col a{color:var(--text-2);text-decoration:none;font-size:14.5px;transition:color var(--dur) ease-out}
.foot-col a:hover{color:var(--orange)}
.foot-copy{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line-soft);
  text-align:center;color:var(--text-3);font-size:13px;
}

/* 滚动进入 */
.js .reveal{opacity:0;transform:translateY(16px)}
.js .reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .5s ease-out,transform .5s ease-out;
}

/* 响应式 */
@media (max-width:1279px){
  .container{padding:0 28px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .container{padding:0 22px}
  .section{padding:64px 0}
  .hero-inner{padding:32px 24px}
  .hero-inner h1{font-size:34px}
  .step-row{grid-template-columns:1fr;gap:26px;padding:36px 0}
  .step-row.is-reverse .step-media{order:0}
  .step-row.is-reverse .step-copy{order:0}
  .step-media img{height:230px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  body{font-size:16px}
  .section{padding:56px 0}
  .section-title{font-size:24px}
  .prep-grid{grid-template-columns:1fr}
  .trouble-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr;border-top:1px solid var(--line-soft)}
  .hero-stats .stat{border-right:0;border-bottom:1px solid var(--line-soft);padding:14px 0}
  .hero-stats .stat:last-child{border-bottom:0}
  .cta-band{padding:30px 24px}
  .cta-band h2{font-size:22px}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 100%}
  .hero-actions .btn{flex:1 1 100%}
  .section-eyebrow{margin-bottom:8px}
}
@media (max-width:520px){
  .container{padding:0 18px}
  .hero-kv{border-radius:18px;min-height:0}
  .hero-inner{padding:26px 20px}
  .hero-inner h1{font-size:30px}
  .step-copy h3{font-size:20px}
  .foot-grid{grid-template-columns:1fr}
  .btn{height:46px}
  .faq-item summary{font-size:16px;padding:18px 2px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none}
  *{transition-duration:1ms !important;animation-duration:1ms !important}
}

/* roulang page: category2 */
:root{
  --bg-1:#0B0618;
  --bg-2:#170E2E;
  --primary:#7B5CFF;
  --energy:#FF7A45;
  --cyan:#3FE0C8;
  --surface:#171030;
  --surface-2:#1E1640;
  --overlay:#241A4A;
  --text:#F2EFFB;
  --text-2:#B9B0D6;
  --text-3:#7C7395;
  --line:rgba(255,255,255,.08);
  --border:rgba(123,92,255,.18);
  --r-sm:8px;
  --r-md:16px;
  --r-lg:22px;
  --r-btn:10px;
  --shadow:0 1px 0 rgba(255,255,255,.04) inset, 0 12px 32px rgba(0,0,0,.45);
  --shadow-hover:0 16px 40px rgba(123,92,255,.22);
  --nav-w:240px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  min-height:100vh;
  font-family:"Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.9;
  color:var(--text);
  background:linear-gradient(180deg,#0B0618 0%,#170E2E 100%);
  background-attachment:fixed;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(1px 1px at 20px 30px, rgba(255,255,255,.30), transparent 60%),
    radial-gradient(1px 1px at 118px 92px, rgba(255,255,255,.18), transparent 60%),
    radial-gradient(2px 2px at 204px 158px, rgba(255,255,255,.22), transparent 60%),
    radial-gradient(1px 1px at 302px 62px, rgba(255,255,255,.14), transparent 60%);
  background-size:360px 260px, 420px 320px, 520px 380px, 480px 300px;
  background-repeat:repeat;
}
h1,h2,h3,h4{font-weight:700;letter-spacing:-.01em;line-height:1.35;margin:0}
p{margin:0}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--energy);outline-offset:2px;border-radius:4px}

/* ===== 布局骨架 ===== */
.side-nav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  z-index:60;
  display:flex;
  flex-direction:column;
  padding:26px 18px 20px;
  background:#0B0618;
  border-right:1px solid var(--line);
}
.main{
  position:relative;
  z-index:1;
  margin-left:var(--nav-w);
  min-width:0;
}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 28px;
}

/* ===== 品牌 ===== */
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  padding:0 6px 22px;
  border-bottom:1px solid var(--line);
  margin-bottom:22px;
}
.brand-mark{
  flex:none;
  width:40px;height:40px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:linear-gradient(140deg,#7B5CFF,#3B2794);
  color:#fff;
  font-size:18px;
  font-weight:800;
  box-shadow:0 8px 20px rgba(123,92,255,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:15.5px;font-weight:800;color:var(--text)}
.brand-text em{font-style:normal;font-size:12.5px;color:var(--text-3);letter-spacing:.06em}

/* ===== 左侧导航 ===== */
.nav-list{display:flex;flex-direction:column;gap:4px;flex:1 1 auto;overflow-y:auto}
.nav-item{
  position:relative;
  display:block;
  padding:12px 14px;
  border:1px solid transparent;
  border-radius:var(--r-sm);
  font-size:15px;
  color:var(--text-2);
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.nav-item:hover{color:var(--text);border-color:var(--border);background:rgba(123,92,255,.08)}
.nav-item.is-active{
  background:var(--surface-2);
  color:var(--text);
  font-weight:600;
  border-color:var(--border);
}
.nav-item.is-active::before{
  content:"";
  position:absolute;
  left:-1px;top:12px;bottom:12px;
  width:3px;
  border-radius:0 3px 3px 0;
  background:var(--energy);
}
.nav-foot{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12.5px;
  line-height:1.75;
  color:var(--text-3);
}

/* ===== 移动端顶栏与抽屉 ===== */
.mobile-bar{
  display:none;
  position:fixed;
  top:0;left:0;right:0;
  height:60px;
  z-index:70;
  align-items:center;
  justify-content:space-between;
  padding:0 18px;
  background:#0B0618;
  border-bottom:1px solid var(--line);
}
.brand-mini{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:700}
.brand-mini .brand-mark{width:32px;height:32px;font-size:15px;border-radius:10px}
.burger{
  width:44px;height:44px;
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  gap:5px;
  background:transparent;
  border:1px solid var(--border);
  border-radius:var(--r-sm);
  cursor:pointer;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.burger:hover{border-color:var(--primary);background:rgba(123,92,255,.12)}
.burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text);transition:transform .22s ease-out,opacity .22s ease-out}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer-mask{
  position:fixed;inset:0;z-index:80;
  background:rgba(11,6,24,.72);
  opacity:0;visibility:hidden;
  transition:opacity .22s ease-out,visibility .22s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;
  width:82vw;max-width:340px;
  z-index:90;
  padding:26px 22px;
  background:#120A26;
  border-left:1px solid var(--border);
  display:flex;flex-direction:column;
  transform:translateX(102%);
  transition:transform .24s ease-out;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .nav-list{gap:8px}
.drawer .nav-item{font-size:17px;line-height:56px;padding:0 14px}
.drawer .btn{margin-top:20px;width:100%}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15.5px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.btn-primary{background:var(--energy);color:#22100A}
.btn-primary:hover{background:#FF9068;transform:translateY(-2px);box-shadow:0 16px 36px rgba(255,122,69,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--text)}
.btn-ghost:hover{background:rgba(123,92,255,.14);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn i{transition:transform .2s ease-out}
.btn:hover i{transform:translateX(2px)}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  padding:26px 0 0;
  font-size:13px;
  color:var(--text-3);
}
.breadcrumb a{color:var(--text-3);transition:color .2s ease-out}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .current{font-weight:600;color:var(--text-2)}

/* ===== Hero ===== */
.page-hero{
  position:relative;
  margin-top:22px;
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:#0F0824;
}
.page-hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  opacity:.34;
}
.page-hero::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(100deg,#0B0618 14%,rgba(11,6,24,.78) 54%,rgba(23,14,46,.48) 100%);
}
.page-hero-inner{
  position:relative;
  z-index:2;
  padding:58px 46px 54px;
  max-width:790px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--cyan);
  margin-bottom:16px;
}
.eyebrow::before{content:"";width:20px;height:1px;background:var(--cyan);opacity:.7}
.page-hero h1{
  font-size:clamp(30px,3.6vw,48px);
  font-weight:800;
  margin-bottom:18px;
}
.page-hero h1 span{color:var(--energy)}
.page-hero p.lead{
  font-size:17px;
  line-height:1.9;
  color:var(--text-2);
  max-width:640px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

/* ===== 数据条 ===== */
.stat-bar{
  position:relative;
  z-index:3;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  margin-top:28px;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--r-md);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.stat{padding:22px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat-label{
  display:block;
  font-size:12.5px;
  letter-spacing:.1em;
  color:var(--text-3);
  margin-bottom:8px;
}
.stat strong{display:block;font-size:18px;font-weight:700;color:var(--text)}

/* ===== 板块通用 ===== */
.section{padding:88px 0 0}
.section-head{max-width:720px;margin-bottom:36px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:14px}
.section-head p{color:var(--text-2);font-size:16px}

/* ===== 要点清单 ===== */
.key-list{
  list-style:none;
  margin:0;padding:0;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:0 48px;
  border-top:1px solid var(--line);
}
.key-item{
  display:flex;
  gap:16px;
  padding:26px 0;
  border-bottom:1px solid var(--line);
}
.key-icon{
  flex:none;
  width:42px;height:42px;
  display:flex;align-items:center;justify-content:center;
  border-radius:12px;
  background:var(--surface-2);
  border:1px solid var(--border);
  color:var(--cyan);
  font-size:16px;
}
.key-item h3{font-size:18px;margin-bottom:6px}
.key-item p{color:var(--text-2);font-size:15.5px;line-height:1.8}

/* ===== 时间线 ===== */
.timeline{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  margin-top:8px;
}
.tl-item{padding-right:24px}
.tl-rail{position:relative;height:20px;margin-bottom:18px}
.tl-rail::before{
  content:"";
  position:absolute;
  top:9px;left:0;right:0;
  height:1px;
  background:rgba(255,255,255,.12);
}
.tl-dot{
  position:absolute;
  top:0;left:0;
  width:18px;height:18px;
  border-radius:50%;
  background:var(--primary);
  border:3px solid #0F0824;
}
.tl-item.is-now .tl-dot{
  background:var(--energy);
  box-shadow:0 0 0 6px rgba(255,122,69,.18);
}
.tl-time{font-size:13px;letter-spacing:.08em;color:var(--cyan);margin-bottom:6px}
.tl-item h3{font-size:17px;margin-bottom:8px}
.tl-item p{color:var(--text-2);font-size:15px;line-height:1.8}

/* ===== 图文区块 ===== */
.split{
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:48px;
  align-items:center;
}
.split-media{
  position:relative;
  margin:0;
  border-radius:var(--r-md);
  overflow:hidden;
  border:1px solid var(--border);
  box-shadow:var(--shadow);
}
.split-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11;opacity:.92}
.split-body h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:16px}
.split-body p{color:var(--text-2);margin-bottom:16px}
.plain-list{list-style:none;margin:0;padding:0}
.plain-list li{
  position:relative;
  padding-left:22px;
  margin-bottom:10px;
  color:var(--text-2);
  font-size:15.5px;
}
.plain-list li::before{
  content:"";
  position:absolute;
  left:0;top:12px;
  width:8px;height:8px;
  border-radius:2px;
  background:var(--primary);
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12.5px;
  line-height:1.7;
  border:1px solid rgba(63,224,200,.4);
  background:rgba(63,224,200,.12);
  color:var(--cyan);
  margin-bottom:16px;
}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding:22px 4px;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  transition:color .2s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--primary)}
.faq-item[open] summary{color:var(--primary)}
.faq-item summary i{flex:none;margin-top:6px;color:var(--text-3);transition:transform .22s ease-out,color .22s ease-out}
.faq-item[open] summary i{transform:rotate(180deg);color:var(--energy)}
.faq-answer{
  max-width:820px;
  padding:0 4px 24px;
  color:var(--text-2);
  font-size:16px;
  line-height:1.85;
}

/* ===== CTA 条 ===== */
.cta-band{
  margin-top:88px;
  padding:44px 46px;
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  background:linear-gradient(120deg,#1E1640 0%,#150C2C 100%);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  box-shadow:var(--shadow);
}
.cta-band h2{font-size:clamp(20px,2.4vw,28px);margin-bottom:10px}
.cta-band p{color:var(--text-2);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ===== 页脚 ===== */
.site-footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  background:rgba(11,6,24,.6);
}
.foot-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;
  padding:56px 0 36px;
}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{width:32px;height:32px;font-size:15px;border-radius:10px}
.foot-col p{color:var(--text-3);font-size:14px;line-height:1.85}
.foot-col h4{font-size:14.5px;color:var(--text);margin-bottom:14px}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:10px}
.foot-col a{color:var(--text-3);font-size:14px;transition:color .2s ease-out}
.foot-col a:hover{color:var(--cyan)}
.foot-copy{
  padding:20px 0 28px;
  border-top:1px solid var(--line);
  text-align:center;
  font-size:13px;
  color:var(--text-3);
}

/* ===== 滚动淡入 ===== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.is-in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1279px){
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .side-nav{display:none}
  .mobile-bar{display:flex}
  .main{margin-left:0;padding-top:60px}
  .page-hero-inner{padding:44px 30px 42px}
  .stat-bar{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .section{padding-top:64px}
  .split{grid-template-columns:1fr;gap:28px}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px}
  .cta-band{margin-top:64px;padding:34px 30px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .key-list{grid-template-columns:1fr;gap:0}
  .timeline{grid-template-columns:1fr;gap:0}
  .tl-item{padding:0 0 26px}
  .tl-rail::before{right:auto;width:1px;height:100%;top:0;left:8px}
  .tl-dot{left:0}
  .page-hero{margin-top:18px}
  .page-hero-inner{padding:36px 22px 34px}
  .stat-bar{grid-template-columns:1fr}
  .stat{border-right:none;border-bottom:1px solid var(--line)}
  .stat:last-child{border-bottom:none}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .section{padding-top:56px}
  .cta-band{margin-top:56px;padding:28px 22px}
  .foot-grid{grid-template-columns:1fr;gap:28px;padding:40px 0 24px}
  .site-footer{margin-top:64px}
  .faq-item summary{font-size:16px;padding:18px 2px}
}

/* roulang page: category3 */
:root{
  --ink:#0B0618;
  --ink-2:#170E2E;
  --surface:#171030;
  --surface-2:#1E1640;
  --surface-3:#241A4A;
  --primary:#7B5CFF;
  --energy:#FF7A45;
  --mint:#3FE0C8;
  --text:#F2EFFB;
  --text-2:#B9B0D6;
  --text-3:#7C7395;
  --line:rgba(123,92,255,.18);
  --divider:rgba(255,255,255,.08);
  --r-sm:8px;
  --r-md:16px;
  --r-lg:22px;
  --r-btn:10px;
  --shadow-1:inset 0 1px 0 rgba(255,255,255,.04), 0 12px 32px rgba(0,0,0,.45);
  --shadow-hover:0 16px 40px rgba(123,92,255,.22);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
html body{
  margin:0;
  padding:0;
  font-family:"Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  font-size:16.5px;
  line-height:1.9;
  color:var(--text);
  background:linear-gradient(180deg,#0B0618 0%,#170E2E 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    radial-gradient(1px 1px at 8% 14%, rgba(255,255,255,.32), transparent 100%),
    radial-gradient(1px 1px at 22% 42%, rgba(255,255,255,.18), transparent 100%),
    radial-gradient(2px 2px at 36% 8%, rgba(255,255,255,.24), transparent 100%),
    radial-gradient(1px 1px at 54% 28%, rgba(255,255,255,.15), transparent 100%),
    radial-gradient(1px 1px at 68% 62%, rgba(255,255,255,.28), transparent 100%),
    radial-gradient(2px 2px at 82% 20%, rgba(255,255,255,.20), transparent 100%),
    radial-gradient(1px 1px at 92% 74%, rgba(255,255,255,.16), transparent 100%),
    radial-gradient(1px 1px at 14% 82%, rgba(255,255,255,.22), transparent 100%),
    radial-gradient(1px 1px at 44% 92%, rgba(255,255,255,.14), transparent 100%),
    radial-gradient(1px 1px at 74% 88%, rgba(255,255,255,.18), transparent 100%);
}
::selection{background:rgba(123,92,255,.4);color:#fff}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--energy);outline-offset:2px;border-radius:6px}

.site-shell{position:relative;z-index:1;display:flex;min-height:100vh}
.site-shell .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 侧边导航 ---------- */
.sidebar{
  position:fixed;
  top:0;left:0;bottom:0;
  width:240px;
  display:flex;
  flex-direction:column;
  gap:26px;
  padding:28px 18px 22px;
  background:rgba(17,10,36,.86);
  border-right:1px solid var(--line);
  overflow-y:auto;
  z-index:60;
}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--text)}
.brand-mark{
  flex:0 0 auto;
  width:40px;height:40px;
  border-radius:12px;
  display:grid;place-items:center;
  font-size:18px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,#7B5CFF,#4A32C9);
  box-shadow:0 8px 20px rgba(123,92,255,.35);
}
.brand-text strong{display:block;font-size:16px;font-weight:800;letter-spacing:.02em;line-height:1.35}
.brand-text span{display:block;font-size:11.5px;letter-spacing:.18em;color:var(--text-3)}
.nav-label{font-size:11.5px;letter-spacing:.18em;color:var(--text-3);padding-left:6px}
.nav-list{display:flex;flex-direction:column;gap:6px}
.nav-item{
  position:relative;
  display:block;
  padding:12px 14px;
  border-radius:10px;
  border:1px solid transparent;
  font-size:15px;
  color:var(--text-2);
  text-decoration:none;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out;
}
.nav-item:hover{color:var(--text);background:rgba(123,92,255,.09);border-color:var(--line)}
.nav-item.is-active{background:var(--surface-2);border-color:var(--line);color:var(--text);font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:9px;bottom:9px;width:3px;border-radius:3px;background:var(--energy);
}
.sidebar-foot{margin-top:auto;padding-top:18px;border-top:1px solid var(--divider);font-size:12.5px;line-height:1.9;color:var(--text-3)}
.sidebar-foot a{color:var(--text-2);text-decoration:none}
.sidebar-foot a:hover{color:var(--energy)}

/* ---------- 移动端顶栏与抽屉 ---------- */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:60px;
  align-items:center;justify-content:space-between;
  padding:0 16px;
  background:rgba(11,6,24,.94);
  border-bottom:1px solid var(--line);
  z-index:70;
}
.topbar-brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.topbar-brand .brand-mark{width:32px;height:32px;border-radius:9px;font-size:15px}
.topbar-brand b{font-size:15.5px;font-weight:800;letter-spacing:.02em}
.menu-btn{
  width:44px;height:44px;
  display:grid;place-items:center;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:10px;
  cursor:pointer;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.menu-btn:hover{border-color:var(--energy);background:var(--surface-3)}
.menu-btn span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
.menu-btn span::before,.menu-btn span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
.menu-btn span::before{top:-6px}
.menu-btn span::after{top:6px}
.drawer-mask{
  position:fixed;inset:0;z-index:80;
  background:rgba(11,6,24,.72);
  opacity:0;visibility:hidden;
  transition:opacity .24s ease-out,visibility .24s ease-out;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:90;
  width:82vw;max-width:360px;
  padding:22px 20px;
  background:var(--surface);
  border-left:1px solid var(--line);
  transform:translateX(104%);
  transition:transform .24s ease-out;
  display:flex;flex-direction:column;gap:6px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer .nav-item{font-size:17px;line-height:1.6;padding:16px 14px}
.drawer-cta{margin-top:auto;padding-top:20px;border-top:1px solid var(--divider)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.drawer-close{
  width:40px;height:40px;border-radius:10px;background:var(--surface-2);
  border:1px solid var(--line);color:var(--text-2);font-size:18px;cursor:pointer;
  transition:border-color .2s ease-out,color .2s ease-out;
}
.drawer-close:hover{border-color:var(--energy);color:var(--text)}

/* ---------- 主内容区 ---------- */
.main-area{margin-left:240px;min-width:0;width:calc(100% - 240px);position:relative;z-index:1;display:flex;flex-direction:column}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);padding:44px 0 68px}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.34;
}
.hero-veil{
  position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(11,6,24,.97) 0%,rgba(23,14,46,.84) 46%,rgba(11,6,24,.52) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:820px}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:26px}
.crumb a{color:var(--text-3);text-decoration:none;transition:color .2s ease-out}
.crumb a:hover{color:var(--mint)}
.crumb .sep{color:rgba(255,255,255,.22)}
.crumb .now{color:var(--text);font-weight:600}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:999px;
  font-size:12.5px;letter-spacing:.1em;
  color:var(--mint);
  border:1px solid rgba(63,224,200,.42);
  background:rgba(63,224,200,.1);
}
.h1{
  font-size:clamp(30px,4.2vw,50px);
  font-weight:800;
  letter-spacing:-.01em;
  line-height:1.26;
  margin:20px 0 18px;
}
.hero-lead{font-size:17px;color:var(--text-2);max-width:700px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;margin-top:38px;max-width:640px;
}
.stat{
  background:rgba(30,22,64,.7);
  border:1px solid var(--line);
  border-radius:14px;
  padding:14px 18px;
}
.stat b{display:block;font-size:22px;font-weight:800;color:var(--text);letter-spacing:-.01em}
.stat span{display:block;font-size:12.5px;color:var(--text-3);letter-spacing:.06em}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15.5px;font-weight:600;
  text-decoration:none;cursor:pointer;
  transition:transform .2s ease-out,background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.btn-primary{background:var(--energy);color:#22110A}
.btn-primary:hover{background:#FF9066;transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,122,69,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-secondary{background:transparent;border-color:var(--primary);color:#CDC3FF}
.btn-secondary:hover{background:rgba(123,92,255,.16);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-2);border-color:transparent;padding:0 6px;text-decoration:underline;text-underline-offset:6px}
.btn-ghost:hover{color:var(--energy)}
.btn[disabled],.btn.is-disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------- 板块通用 ---------- */
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--deep{background:rgba(9,5,20,.72);border-top:1px solid var(--divider);border-bottom:1px solid var(--divider)}
.sec-head{max-width:780px;margin-bottom:40px}
.sec-eyebrow{display:block;font-size:12.5px;letter-spacing:.16em;color:var(--mint);margin-bottom:12px}
.h2{font-size:clamp(24px,2.7vw,32px);font-weight:800;letter-spacing:-.01em;line-height:1.36;margin-bottom:12px}
.h3{font-size:20px;font-weight:700;line-height:1.5}
.sec-head p{color:var(--text-2);font-size:16px}
.muted{color:var(--text-3);font-size:13.5px}

/* ---------- 四步流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  position:relative;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:26px 22px;
  box-shadow:var(--shadow-1);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.step:hover{transform:translateY(-3px);border-color:rgba(123,92,255,.48);box-shadow:var(--shadow-hover)}
.step-num{
  display:grid;place-items:center;
  width:38px;height:38px;border-radius:999px;
  font-size:15px;font-weight:800;
  color:#FFB08D;
  background:rgba(255,122,69,.14);
  border:1px solid rgba(255,122,69,.45);
  margin-bottom:16px;
}
.step h3{font-size:18.5px;font-weight:700;margin-bottom:8px}
.step p{color:var(--text-2);font-size:15px;line-height:1.8}
.step::after{
  content:"";position:absolute;top:46px;right:-13px;
  width:8px;height:8px;
  border-top:2px solid rgba(123,92,255,.55);
  border-right:2px solid rgba(123,92,255,.55);
  transform:rotate(45deg);
}
.step:last-child::after{display:none}

/* ---------- 表格式权益对比 ---------- */
.table-wrap{
  overflow-x:auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
}
.benefit-table{width:100%;min-width:760px;border-collapse:collapse;font-size:15px}
.benefit-table th,.benefit-table td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--divider);vertical-align:middle}
.benefit-table thead th{
  font-size:14px;font-weight:700;color:var(--text);
  background:var(--surface-2);
  letter-spacing:.02em;
  white-space:nowrap;
}
.benefit-table tbody th{font-weight:600;color:var(--text-2);font-size:14.5px;width:26%}
.benefit-table tbody tr:last-child th,.benefit-table tbody tr:last-child td{border-bottom:none}
.benefit-table tbody tr:hover td,.benefit-table tbody tr:hover th{background:rgba(123,92,255,.05)}
.benefit-table .is-featured{background:rgba(255,122,69,.07);border-left:1px solid rgba(255,122,69,.28);border-right:1px solid rgba(255,122,69,.28)}
.benefit-table thead .is-featured{background:rgba(255,122,69,.14)}
.check{color:var(--mint);font-weight:700}
.dash{color:var(--text-3)}
.tag{
  display:inline-flex;align-items:center;
  padding:4px 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.04em;
  border:1px solid transparent;
}
.tag-mint{color:var(--mint);border-color:rgba(63,224,200,.42);background:rgba(63,224,200,.1)}
.tag-energy{color:#FFB08D;border-color:rgba(255,122,69,.5);background:rgba(255,122,69,.14)}
.tag-neutral{color:var(--text-2);border-color:var(--divider);background:rgba(255,255,255,.04)}
.table-note{margin-top:16px;color:var(--text-3);font-size:13.5px}

.benefit-cards{display:none;grid-template-columns:1fr;gap:16px}
.benefit-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:22px;
  box-shadow:var(--shadow-1);
}
.benefit-card.is-featured{border-color:rgba(255,122,69,.5)}
.benefit-card h3{font-size:18px;font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.benefit-card dl{display:grid;grid-template-columns:1fr;gap:0}
.benefit-card .row{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid var(--divider);font-size:14.5px}
.benefit-card .row:last-child{border-bottom:none}
.benefit-card dt{color:var(--text-3);flex:0 0 auto}
.benefit-card dd{margin:0;color:var(--text);text-align:right}

/* ---------- 图文与清单 ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-1);
}
.media img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
.media::after{content:"";position:absolute;inset:0;background:linear-gradient(200deg,rgba(11,6,24,0) 40%,rgba(11,6,24,.55) 100%)}
.checklist{display:grid;gap:14px;margin-top:26px}
.check-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.check-item:hover{transform:translateY(-3px);border-color:rgba(123,92,255,.45);box-shadow:var(--shadow-hover)}
.check-item .ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
  background:rgba(63,224,200,.12);border:1px solid rgba(63,224,200,.4);color:var(--mint);
  font-size:13px;font-weight:700;margin-top:4px;
}
.check-item b{display:block;font-size:16px;font-weight:700;margin-bottom:4px}
.check-item p{color:var(--text-2);font-size:14.6px;line-height:1.8}

/* ---------- 规则卡片 ---------- */
.rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:32px}
.rule-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
  box-shadow:var(--shadow-1);
  transition:transform .22s ease-out,border-color .22s ease-out,box-shadow .22s ease-out;
}
.rule-card:hover{transform:translateY(-3px);border-color:rgba(255,122,69,.45);box-shadow:var(--shadow-hover)}
.rule-card h3{font-size:17.5px;font-weight:700;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.rule-card h3::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--energy);flex:0 0 auto}
.rule-card p{color:var(--text-2);font-size:14.8px;line-height:1.85}

/* ---------- FAQ ---------- */
.faq-list{margin-top:32px;border-top:1px solid var(--divider)}
.faq-item{border-bottom:1px solid var(--divider)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:20px;
  padding:22px 4px;
  font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#C9BEFF}
.faq-item[open] summary{color:var(--primary)}
.faq-arrow{
  flex:0 0 auto;width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;
  border:1px solid var(--line);color:var(--text-2);
  transition:transform .22s ease-out,border-color .22s ease-out,color .22s ease-out;
  font-size:12px;
}
.faq-item[open] .faq-arrow{transform:rotate(180deg);border-color:var(--primary);color:#CDC3FF}
.faq-body{padding:0 4px 24px;max-width:820px;color:var(--text-2);font-size:15.6px;line-height:1.9}
.faq-body a{color:var(--mint);text-decoration:underline;text-underline-offset:4px}

/* ---------- 报名表单 CTA ---------- */
.signup{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.point-list{display:grid;gap:12px;margin-top:26px}
.point-list li{display:flex;gap:12px;align-items:flex-start;color:var(--text-2);font-size:15.5px}
.point-list li::before{content:"";flex:0 0 auto;width:8px;height:8px;margin-top:10px;border-radius:2px;background:var(--energy)}
.form-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:28px;
  box-shadow:var(--shadow-1);
}
.form-card h3{font-size:19px;font-weight:700;margin-bottom:6px}
.form-card .form-tip{color:var(--text-3);font-size:13.5px;margin-bottom:22px}
.field{margin-bottom:18px}
.field label{display:block;font-size:13px;color:var(--text-3);margin-bottom:8px;letter-spacing:.02em}
.field input,.field select,.field textarea{
  width:100%;
  min-height:48px;
  padding:12px 14px;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--text);
  font-size:15.5px;
  font-family:inherit;
  transition:border-color .2s ease-out,background .2s ease-out;
}
.field textarea{min-height:96px;resize:vertical}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,#B9B0D6 50%),linear-gradient(135deg,#B9B0D6 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field input::placeholder,.field textarea::placeholder{color:#6E6688}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--energy);background:var(--surface-3)}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible{outline:2px solid var(--energy);outline-offset:2px}
.form-card .btn{width:100%}
.form-foot{margin-top:14px;font-size:12.5px;color:var(--text-3);text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:auto;
  border-top:1px solid var(--line);
  background:rgba(9,5,20,.78);
  padding:64px 0 0;
}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
.foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.foot-brand .brand-mark{width:34px;height:34px;border-radius:10px;font-size:15px}
.foot-brand strong{font-size:16.5px;font-weight:800;letter-spacing:.01em}
.foot-col p{color:var(--text-3);font-size:14px;line-height:1.9;margin-bottom:8px}
.foot-col h4{font-size:14px;font-weight:700;color:var(--text);margin-bottom:16px;letter-spacing:.06em}
.foot-col ul{display:grid;gap:10px}
.foot-col ul a{color:var(--text-2);font-size:14.5px;text-decoration:none;transition:color .2s ease-out}
.foot-col ul a:hover{color:var(--energy)}
.foot-copy{
  margin-top:52px;
  padding:22px 0 26px;
  border-top:1px solid var(--divider);
  text-align:center;
  font-size:13px;
  color:var(--text-3);
}

/* ---------- 滚动淡入 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .55s ease-out,transform .55s ease-out}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .split{gap:32px}
}
@media (max-width:1023px){
  .sidebar{display:none}
  .topbar{display:flex}
  .main-area{margin-left:0;width:100%;padding-top:60px}
  .section{padding:64px 0}
  .section--tight{padding:52px 0}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .step::after{display:none}
  .split{grid-template-columns:1fr;gap:28px}
  .signup{grid-template-columns:1fr;gap:30px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:28px}
  .hero{padding:36px 0 56px}
}
@media (max-width:767px){
  .benefit-table,.table-wrap{display:none}
  .benefit-cards{display:grid}
  .rule-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
}
@media (max-width:639px){
  html body{font-size:16px}
  .site-shell .container{padding:0 20px}
  .steps{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .form-card{padding:22px}
  .section{padding:56px 0}
}

/* roulang page: category4 */
:root{
    --bg-0:#0B0618;
    --bg-1:#170E2E;
    --bg-deep:#0C0718;
    --surface:#171030;
    --surface-2:#1E1640;
    --surface-3:#241A4A;
    --violet:#7B5CFF;
    --orange:#FF7A45;
    --cyan:#3FE0C8;
    --text:#F2EFFB;
    --text-2:#B9B0D6;
    --text-3:#7C7395;
    --line:rgba(123,92,255,.18);
    --line-soft:rgba(255,255,255,.08);
    --r-sm:8px;
    --r-md:16px;
    --r-lg:22px;
    --r-btn:10px;
    --shadow-1:0 1px 0 rgba(255,255,255,.04), 0 12px 32px rgba(0,0,0,.45);
    --shadow-2:0 16px 40px rgba(123,92,255,.22);
    --nav-w:240px;
    --font-cn:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    font-family:var(--font-cn);
    font-size:16.5px;
    line-height:1.9;
    color:var(--text);
    background:linear-gradient(180deg,var(--bg-0) 0%,var(--bg-1) 55%,#120A26 100%);
    min-height:100vh;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background-image:
      radial-gradient(1px 1px at 26px 34px, rgba(255,255,255,.34), transparent),
      radial-gradient(1px 1px at 148px 206px, rgba(255,255,255,.17), transparent),
      radial-gradient(1.6px 1.6px at 266px 96px, rgba(63,224,200,.20), transparent),
      radial-gradient(1px 1px at 352px 318px, rgba(255,255,255,.22), transparent),
      radial-gradient(1px 1px at 88px 402px, rgba(123,92,255,.30), transparent);
    background-size:440px 440px,440px 440px,620px 620px,520px 520px,520px 520px;
    background-position:0 0,0 0,80px 140px,220px 60px,0 0;
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  p{margin:0 0 1em}
  p:last-child{margin-bottom:0}
  .container{width:100%;max-width:1280px;margin:0 auto;padding-left:24px;padding-right:24px}
  .visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

  /* ============ 左侧竖向导航 ============ */
  .side-nav{
    position:fixed;
    top:0;left:0;bottom:0;
    width:var(--nav-w);
    z-index:60;
    display:flex;
    flex-direction:column;
    gap:26px;
    padding:26px 18px 22px;
    background:linear-gradient(180deg,#140B2A 0%,#0C0619 100%);
    border-right:1px solid var(--line-soft);
    overflow-y:auto;
  }
  .brand{display:flex;align-items:center;gap:10px}
  .brand-mark{
    width:34px;height:34px;flex:0 0 34px;
    border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    font-size:15px;font-weight:800;color:#0B0618;
    background:linear-gradient(135deg,var(--violet),var(--orange));
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.14);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.3}
  .brand-text strong{font-size:15.5px;letter-spacing:-.01em;color:var(--text)}
  .brand-text span{font-size:12.5px;color:var(--text-3);letter-spacing:.14em}
  .nav-list{display:flex;flex-direction:column;gap:4px}
  .nav-item{
    position:relative;
    display:flex;align-items:center;
    padding:11px 14px;
    border-radius:10px;
    font-size:14.5px;
    color:var(--text-2);
    border:1px solid transparent;
    transition:color .2s ease-out,background .2s ease-out,border-color .2s ease-out;
  }
  .nav-item:hover{color:var(--text);border-color:var(--line);background:rgba(123,92,255,.08)}
  .nav-item:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
  .nav-item.is-active{
    color:var(--text);
    font-weight:600;
    background:var(--surface-2);
    border-color:var(--line);
  }
  .nav-item.is-active::before{
    content:"";
    position:absolute;left:0;top:10px;bottom:10px;width:3px;
    border-radius:0 3px 3px 0;
    background:var(--orange);
    box-shadow:0 0 10px rgba(255,122,69,.6);
  }
  .nav-foot{
    margin-top:auto;
    padding-top:18px;
    border-top:1px solid var(--line-soft);
    font-size:12.5px;
    line-height:1.8;
    color:var(--text-3);
  }
  .nav-foot p{margin:0 0 4px}
  .nav-cta{margin-top:14px;display:none}

  /* ============ 移动端顶栏与抽屉 ============ */
  .topbar{
    display:none;
    align-items:center;
    justify-content:space-between;
    position:fixed;top:0;left:0;right:0;
    height:60px;padding:0 20px;
    background:rgba(12,6,25,.96);
    border-bottom:1px solid var(--line-soft);
    z-index:70;
  }
  .hamburger{
    width:44px;height:44px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
    border-radius:10px;
    border:1px solid var(--line);
    background:var(--surface);
    cursor:pointer;
    transition:background .2s ease-out,border-color .2s ease-out;
  }
  .hamburger:hover{background:var(--surface-2);border-color:rgba(255,122,69,.5)}
  .hamburger:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
  .hamburger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-2);transition:background .2s ease-out}
  .hamburger:hover span{background:var(--text)}
  .scrim{
    position:fixed;inset:0;z-index:55;
    background:rgba(11,6,24,.72);
    opacity:0;pointer-events:none;
    transition:opacity .24s ease-out;
  }
  .scrim.is-open{opacity:1;pointer-events:auto}

  /* ============ 主内容框架 ============ */
  .main-wrap{
    position:relative;
    z-index:1;
    margin-left:var(--nav-w);
    min-height:100vh;
    display:flex;
    flex-direction:column;
  }
  .page-body{flex:1 0 auto;padding:24px 0 0}
  .section,.faq-group{margin-top:80px}

  /* ============ 面包屑 ============ */
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--text-3);
    padding-top:8px;
  }
  .breadcrumb a{color:var(--text-2);transition:color .2s ease-out}
  .breadcrumb a:hover{color:var(--orange)}
  .breadcrumb a:focus-visible{outline:2px solid var(--orange);outline-offset:2px;border-radius:4px}
  .breadcrumb .sep{color:rgba(255,255,255,.22)}
  .breadcrumb .current{color:var(--text);font-weight:600}

  /* ============ Hero ============ */
  .hero-panel{
    position:relative;
    overflow:hidden;
    margin-top:26px;
    padding:44px 40px;
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    background:
      radial-gradient(120% 120% at 88% 8%, rgba(123,92,255,.24), transparent 56%),
      radial-gradient(80% 90% at 6% 92%, rgba(255,122,69,.15), transparent 60%),
      linear-gradient(160deg,#1A1136 0%,#120A26 72%);
    box-shadow:var(--shadow-1);
  }
  .hero-panel::after{
    content:"";
    position:absolute;inset:0;
    pointer-events:none;
    background-image:
      radial-gradient(1px 1px at 30px 44px, rgba(255,255,255,.38), transparent),
      radial-gradient(1px 1px at 168px 128px, rgba(255,255,255,.2), transparent),
      radial-gradient(1.6px 1.6px at 250px 60px, rgba(63,224,200,.22), transparent);
    background-size:280px 280px,320px 320px,460px 460px;
  }
  .hero-panel > *{position:relative;z-index:1}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 10px;
    border-radius:999px;
    font-size:12.5px;
    letter-spacing:.08em;
    color:var(--cyan);
    background:rgba(63,224,200,.12);
    border:1px solid rgba(63,224,200,.45);
  }
  .hero-panel h1{
    margin:18px 0 0;
    font-size:clamp(30px,3.6vw,46px);
    line-height:1.24;
    font-weight:800;
    letter-spacing:-.02em;
  }
  .hero-sub{
    max-width:780px;
    margin-top:16px;
    color:var(--text-2);
    font-size:17px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
  .hero-stats{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:16px;
    margin-top:32px;
    padding-top:22px;
    border-top:1px solid var(--line-soft);
  }
  .stat b{display:block;font-size:22px;font-weight:800;letter-spacing:-.01em;color:var(--text)}
  .stat span{display:block;margin-top:2px;font-size:13px;color:var(--text-3)}

  /* ============ 按钮体系 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 22px;
    border-radius:var(--r-btn);
    border:1px solid transparent;
    font-size:15px;font-weight:600;
    font-family:inherit;
    cursor:pointer;
    transition:transform .2s ease-out,background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out,color .2s ease-out;
  }
  .btn:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
  .btn:active{transform:translateY(0)}
  .btn-primary{background:var(--orange);color:#230F03}
  .btn-primary:hover{background:#FF8C5E;transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,122,69,.28)}
  .btn-secondary{background:transparent;border-color:rgba(123,92,255,.55);color:#C9BCFF}
  .btn-secondary:hover{background:rgba(123,92,255,.14);transform:translateY(-2px);box-shadow:var(--shadow-2)}
  .btn-secondary:active{background:rgba(123,92,255,.2)}

  /* ============ 分组锚点行 ============ */
  .anchor-bar{
    position:sticky;
    top:0;
    z-index:30;
    display:flex;
    gap:10px;
    margin-top:34px;
    padding:12px;
    border:1px solid var(--line-soft);
    border-radius:var(--r-md);
    background:#120A26;
    overflow-x:auto;
    scrollbar-width:thin;
  }
  .anchor-chip{
    flex:0 0 auto;
    display:inline-flex;align-items:center;
    padding:8px 14px;
    border-radius:999px;
    font-size:13.5px;
    color:var(--text-2);
    border:1px solid var(--line);
    transition:color .2s ease-out,border-color .2s ease-out,background .2s ease-out;
  }
  .anchor-chip:hover{color:var(--text);border-color:rgba(255,122,69,.6);background:rgba(255,122,69,.1)}
  .anchor-chip:focus-visible{outline:2px solid var(--orange);outline-offset:2px}

  /* ============ FAQ ============ */
  .group-head{max-width:820px}
  .group-tag{
    display:inline-block;
    font-size:12.5px;
    letter-spacing:.1em;
    color:var(--cyan);
  }
  .group-head h2{
    margin:10px 0 10px;
    font-size:clamp(22px,2.4vw,32px);
    font-weight:800;
    letter-spacing:-.01em;
    line-height:1.35;
  }
  .group-head p{color:var(--text-2);margin:0}
  .faq-list{
    margin-top:26px;
    border:1px solid var(--line);
    border-radius:18px;
    background:var(--surface);
    overflow:hidden;
    box-shadow:var(--shadow-1);
  }
  .faq-item{border-bottom:1px solid var(--line-soft)}
  .faq-item:last-child{border-bottom:0}
  .faq-item > summary{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 24px;
    font-size:16.5px;
    font-weight:600;
    color:var(--text);
    cursor:pointer;
    list-style:none;
    transition:color .18s ease-out,background .18s ease-out;
  }
  .faq-item > summary::-webkit-details-marker{display:none}
  .faq-item > summary:hover{color:#C9BCFF;background:rgba(123,92,255,.06)}
  .faq-item > summary:focus-visible{outline:2px solid var(--orange);outline-offset:-2px}
  .faq-item[open] > summary{color:var(--orange)}
  .faq-arrow{flex:0 0 auto;color:var(--text-3);transition:transform .2s ease-out,color .2s ease-out}
  .faq-item[open] .faq-arrow{transform:rotate(180deg);color:var(--orange)}
  .faq-a{
    padding:0 24px 22px;
    max-width:820px;
    color:var(--text-2);
    font-size:16px;
    line-height:1.85;
  }
  .faq-a p{margin:0 0 10px}
  .faq-a p:last-child{margin-bottom:0}
  .faq-a ul{margin:8px 0 0;padding-left:20px;list-style:disc}
  .faq-a li{margin:6px 0}

  /* ============ 规则要点速览 ============ */
  .rules-strip{
    margin-top:84px;
    padding:34px 32px;
    border:1px solid var(--line);
    border-radius:20px;
    background:linear-gradient(180deg,#1A1136 0%,#150D2C 100%);
    box-shadow:var(--shadow-1);
  }
  .rules-strip h2{margin:0 0 8px;font-size:clamp(22px,2.2vw,30px);font-weight:800;letter-spacing:-.01em}
  .rules-strip > p{color:var(--text-2);max-width:760px;margin:0}
  .rules-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
    margin-top:26px;
  }
  .rule-item{
    display:flex;gap:14px;align-items:flex-start;
    padding:18px;
    border-radius:14px;
    background:var(--surface-2);
    border:1px solid var(--line-soft);
    transition:border-color .2s ease-out,transform .2s ease-out;
  }
  .rule-item:hover{border-color:rgba(255,122,69,.5);transform:translateY(-2px)}
  .rule-num{
    flex:0 0 26px;width:26px;height:26px;
    display:flex;align-items:center;justify-content:center;
    border-radius:8px;
    font-size:12.5px;font-weight:700;
    color:#0B0618;
    background:var(--cyan);
  }
  .rule-item strong{display:block;font-size:15.5px;color:var(--text);line-height:1.6}
  .rule-item span{display:block;margin-top:4px;font-size:13.5px;color:var(--text-3);line-height:1.75}

  /* ============ 咨询 CTA ============ */
  .cta-band{
    margin-top:84px;
    padding:36px 32px;
    border:1px solid rgba(255,122,69,.35);
    border-radius:var(--r-lg);
    background:
      radial-gradient(100% 130% at 100% 0%, rgba(255,122,69,.2), transparent 62%),
      linear-gradient(140deg,#1C1238 0%,#120A26 100%);
    box-shadow:var(--shadow-1);
  }
  .cta-inner{display:flex;gap:32px;align-items:center;justify-content:space-between;flex-wrap:wrap}
  .cta-text{flex:1 1 420px;min-width:0}
  .cta-text h2{margin:0 0 10px;font-size:clamp(22px,2.2vw,30px);font-weight:800;letter-spacing:-.01em}
  .cta-text > p{color:var(--text-2);max-width:620px;margin:0}
  .cta-meta{
    display:flex;flex-wrap:wrap;gap:10px 22px;
    margin:18px 0 0;padding:0;list-style:none;
    font-size:13.5px;color:var(--text-3);
  }
  .cta-meta li{display:flex;align-items:center;gap:8px}
  .cta-meta li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan)}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:0 0 auto}

  /* ============ 页脚 ============ */
  .site-footer{
    margin-top:96px;
    padding:56px 0 28px;
    background:var(--bg-deep);
    border-top:1px solid var(--line-soft);
    position:relative;
    z-index:1;
  }
  .foot-grid{
    display:grid;
    grid-template-columns:1.5fr 1fr 1fr 1.2fr;
    gap:32px;
  }
  .foot-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .foot-brand strong{font-size:16.5px;color:var(--text)}
  .foot-col h4{margin:0 0 14px;font-size:14px;font-weight:700;letter-spacing:.04em;color:var(--text)}
  .foot-col p{margin:0 0 8px;font-size:13.5px;line-height:1.8;color:var(--text-3)}
  .foot-col p:first-child{margin-top:0}
  .foot-col:first-child p{max-width:340px}
  .foot-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
  .foot-col ul a{font-size:13.5px;color:var(--text-2);transition:color .2s ease-out}
  .foot-col ul a:hover{color:var(--orange)}
  .foot-col ul a:focus-visible{outline:2px solid var(--orange);outline-offset:2px;border-radius:4px}
  .foot-copy{
    margin-top:40px;padding-top:20px;
    border-top:1px solid var(--line-soft);
    text-align:center;
    font-size:13px;color:var(--text-3);
  }

  /* ============ 响应式 ============ */
  @media (max-width:1279.98px){
    .rules-grid{gap:14px}
  }
  @media (max-width:1023.98px){
    .topbar{display:flex}
    .side-nav{
      left:auto;right:0;top:0;bottom:0;
      width:82vw;max-width:360px;
      transform:translateX(102%);
      transition:transform .24s ease-out;
      border-right:0;
      border-left:1px solid var(--line);
      box-shadow:-24px 0 60px rgba(0,0,0,.5);
      z-index:65;
    }
    .side-nav.is-open{transform:translateX(0)}
    .side-nav .nav-item{font-size:17px;padding:16px 16px;line-height:1.4}
    .nav-cta{display:inline-flex;width:100%}
    .main-wrap{margin-left:0;padding-top:60px}
    .anchor-bar{top:60px}
    .hero-panel{padding:32px 24px;border-radius:20px}
    .foot-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  }
  @media (max-width:639.98px){
    body{font-size:16px}
    .container{padding-left:20px;padding-right:20px}
    .page-body{padding-top:16px}
    .section,.faq-group,.rules-strip,.cta-band{margin-top:56px}
    .hero-stats{grid-template-columns:minmax(0,1fr);gap:14px;margin-top:26px}
    .hero-actions{gap:12px}
    .btn{width:100%;height:46px}
    .faq-item > summary{padding:16px 18px;font-size:16px}
    .faq-a{padding:0 18px 18px;font-size:15.5px}
    .rules-strip{padding:26px 20px}
    .rules-grid{grid-template-columns:minmax(0,1fr)}
    .cta-band{padding:26px 20px}
    .cta-inner{gap:22px}
    .cta-actions{width:100%;flex-direction:column}
    .foot-grid{grid-template-columns:minmax(0,1fr);gap:26px}
    .site-footer{margin-top:64px;padding-top:44px}
  }