/* roulang page: index */
:root{
  --ink-900:#0E0E11;
  --ink-700:#2A2A31;
  --ink-500:#6A6A75;
  --ink-300:#A8A8B3;
  --line:#E6E6E1;
  --paper:#F7F6F2;
  --paper-2:#FFFFFF;
  --accent:#C8FF3D;
  --accent-2:#6C4DFF;
  --danger:#FF5A2B;
  --ok:#12B981;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,14,17,.04);
  --sh-2:0 12px 32px -16px rgba(14,14,17,.14);
  --sh-3:0 24px 60px -28px rgba(14,14,17,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
img{max-width:100%;display:block;}
a{color:var(--ink-900);text-decoration:none;position:relative;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.25;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:0;box-shadow:0 0 0 3px rgba(108,77,255,.30);border-radius:6px;}

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

/* ========== 顶部导航 ========== */
.site-header{
  position:sticky;top:0;z-index:80;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-stuck{
  background:rgba(247,246,242,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom-color:var(--line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:20px;height:64px;
}
@media (min-width:1024px){.nav-inner{height:72px;}}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;color:var(--ink-900);font-size:16px;}
.logo-mark{
  width:32px;height:32px;border-radius:9px;flex:none;
  background:var(--ink-900);color:var(--accent);
  display:grid;place-items:center;font-family:var(--mono);font-size:13px;font-weight:700;
}
.logo-text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:52vw;}
@media (min-width:1024px){.logo-text{max-width:none;}}
.nav-links{display:none;}
@media (min-width:1024px){
  .nav-links{display:flex;align-items:center;gap:32px;}
  .nav-links a{
    font-size:16px;font-weight:500;color:var(--ink-700);
    padding:6px 0;transition:color .18s var(--ease);
  }
  .nav-links a::after{
    content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
    background:var(--accent);transform:scaleX(0);transform-origin:center;
    transition:transform .18s var(--ease);
  }
  .nav-links a:hover{color:var(--accent-2);}
  .nav-links a:hover::after{transform:scaleX(1);}
  .nav-links a.active{color:var(--ink-900);font-weight:600;}
  .nav-links a.active::after{transform:scaleX(1);}
}
.nav-cta{display:none;}
@media (min-width:1024px){.nav-cta{display:inline-flex;}}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;transition:all .2s var(--ease);white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--ink-900);}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);box-shadow:0 0 0 4px rgba(200,255,61,.22);}
.btn-primary:active{transform:translateY(1px);}
.btn-primary:disabled{background:var(--ink-300);color:#fff;cursor:not-allowed;box-shadow:none;}
.btn-ghost{background:transparent;border-color:var(--ink-900);color:var(--ink-900);}
.btn-ghost:hover{background:var(--ink-900);color:#fff;}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}
@media (min-width:1024px){.nav-cta{height:44px;padding:0 20px;font-size:14px;}}

/* ========== Hero ========== */
.hero{
  position:relative;
  padding:36px 0 64px;
  overflow:hidden;
}
@media (min-width:1024px){.hero{padding:56px 0 96px;min-height:78vh;display:flex;align-items:center;}}
.hero-grid{display:grid;gap:36px;}
@media (min-width:1024px){
  .hero-grid{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;align-items:center;}
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 12px;border-radius:var(--r-pill);
  background:var(--paper-2);border:1px solid var(--line);
  font-size:12px;font-weight:500;color:var(--ink-500);letter-spacing:.02em;
}
.hero-eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--ok);display:block;}
.hero h1{
  font-size:clamp(34px,5.2vw,68px);
  font-weight:800;letter-spacing:-.03em;line-height:1.1;
  margin:18px 0 0;
}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 62%,rgba(200,255,61,.85) 62%);}
.hero-sub{
  margin-top:20px;font-size:17px;line-height:1.85;color:var(--ink-500);max-width:560px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-figure{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-3);background:var(--paper-2);
  aspect-ratio:16/11;
}
.hero-figure img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;left:16px;bottom:16px;right:16px;
  background:rgba(14,14,17,.88);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  color:#fff;border-radius:var(--r-md);padding:14px 16px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
}
.hero-float b{font-family:var(--mono);font-size:20px;color:var(--accent);}
.hero-float span{font-size:12px;color:rgba(255,255,255,.72);display:block;}
.hero-float-l{display:flex;flex-direction:column;gap:2px;}

/* ========== 通用板块 ========== */
.section{padding:64px 0;}
@media (min-width:1024px){.section{padding:112px 0;}}
.section-head{max-width:720px;margin-bottom:32px;}
@media (min-width:1024px){.section-head{margin-bottom:48px;}}
.section-head h2{font-size:clamp(24px,3vw,38px);font-weight:700;}
.section-head p{margin-top:14px;color:var(--ink-500);font-size:16px;}
.kicker{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-300);display:block;margin-bottom:12px;
}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.text-link{
  font-size:14px;font-weight:600;color:var(--ink-900);display:inline-flex;align-items:center;gap:6px;
}
.text-link::after{content:"→";transition:transform .18s var(--ease);display:inline-block;}
.text-link:hover{color:var(--accent-2);}
.text-link:hover::after{transform:translateX(4px);}

/* ========== 痛点区 ========== */
.pain-grid{display:grid;gap:20px;}
@media (min-width:768px){.pain-grid{grid-template-columns:repeat(2,1fr);gap:24px;}}
.pain-card{
  display:flex;gap:20px;padding:24px;background:var(--paper-2);
  border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.pain-card:hover{transform:translateY(-2px);border-color:rgba(108,77,255,.35);box-shadow:var(--sh-2);}
.pain-num{
  font-family:var(--mono);font-size:26px;font-weight:700;color:var(--accent);
  -webkit-text-stroke:.6px var(--ink-900);flex:none;width:48px;line-height:1.1;
}
.pain-card h3{font-size:20px;font-weight:600;}
.pain-card p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-500);}

/* ========== 方案（1 大 + 2 小） ========== */
.plan-grid{display:grid;gap:20px;}
@media (min-width:1024px){
  .plan-grid{grid-template-columns:repeat(12,1fr);gap:24px;}
  .plan-main{grid-column:span 6;}
  .plan-side{grid-column:span 3;}
}
.plan-main{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.plan-main:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);}
.plan-main figure{margin:0;aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
.plan-main figure img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.plan-main:hover figure img{transform:scale(1.03);}
.plan-main .plan-body{padding:26px 26px 30px;}
.plan-main h3{font-size:22px;}
.plan-main p{margin-top:12px;color:var(--ink-500);font-size:15px;line-height:1.85;}
.plan-chain{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:20px;font-size:13px;color:var(--ink-700);}
.plan-chain span{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-pill);padding:4px 12px;}
.plan-chain i{color:var(--ink-300);font-style:normal;}
.plan-side{
  background:transparent;border-top:1px solid var(--line);padding:24px 0 0;
  transition:transform .2s var(--ease);
}
@media (min-width:1024px){
  .plan-side{background:var(--paper-2);border:1px solid var(--line);border-top-width:3px;border-top-color:var(--ink-900);border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1);}
  .plan-side:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);border-top-color:var(--accent-2);}
}
.plan-side .idx{font-family:var(--mono);font-size:13px;color:var(--ink-300);}
.plan-side h3{font-size:18px;margin-top:10px;}
.plan-side p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-500);}
.plan-side .text-link{margin-top:16px;}

/* ========== 数据区 ========== */
.stats-band{background:var(--ink-900);color:#fff;border-radius:0;}
.stats-band .section{padding:56px 0;}
@media (min-width:1024px){.stats-band .section{padding:80px 0;}}
.stats-band h2{color:#fff;}
.stats-band .section-head p{color:rgba(255,255,255,.62);}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:32px 20px;}
@media (min-width:900px){.stats{grid-template-columns:repeat(4,1fr);gap:0;}}
.stat{position:relative;padding:0 8px;}
@media (min-width:900px){
  .stat{padding:0 28px;}
  .stat + .stat::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:1px;background:rgba(255,255,255,.16);}
}
.stat b{
  font-family:var(--mono);font-size:clamp(36px,6vw,54px);font-weight:700;
  color:#fff;line-height:1;display:flex;align-items:baseline;gap:6px;letter-spacing:-.02em;
}
.stat b em{font-style:normal;font-size:16px;color:var(--accent);font-weight:600;}
.stat p{margin-top:12px;font-size:14px;color:rgba(255,255,255,.66);line-height:1.7;}
.stat small{display:block;margin-top:6px;font-size:12px;color:rgba(255,255,255,.38);}

/* ========== 内容列表 ========== */
.news-wrap{display:grid;gap:24px;}
@media (min-width:1024px){.news-wrap{grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;align-items:start;}}
.news-feature{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);display:block;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.news-feature:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);}
.news-feature figure{margin:0;aspect-ratio:16/10;overflow:hidden;background:var(--paper);}
.news-feature figure img{width:100%;height:100%;object-fit:cover;}
.news-feature .body{padding:22px 24px 26px;}
.news-feature h3{font-size:22px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-feature p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-500);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-list{border-top:1px solid var(--line);}
.news-row{
  display:flex;gap:16px;align-items:flex-start;padding:20px 4px;
  border-bottom:1px solid var(--line);transition:background .18s var(--ease);
}
.news-row:hover{background:var(--paper-2);}
.news-thumb{
  width:72px;height:72px;flex:none;border-radius:var(--r-sm);overflow:hidden;
  background:var(--paper);border:1px solid var(--line);
}
.news-thumb img{width:100%;height:100%;object-fit:cover;}
.news-row .txt{min-width:0;flex:1;}
.news-row h4{
  font-size:18px;font-weight:600;line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s var(--ease);
}
.news-row:hover h4{color:var(--accent-2);}
.news-row .sum{
  margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-500);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.meta{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  margin-top:10px;font-size:12px;color:var(--ink-500);font-family:var(--mono);
}
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;font-family:var(--font);
}
.badge-cat{background:var(--accent);color:var(--ink-900);}
.badge-line{border:1px solid var(--line);color:var(--ink-700);background:var(--paper-2);}
.news-row .arrow{color:var(--ink-300);font-size:18px;align-self:center;transition:transform .18s var(--ease),color .18s var(--ease);}
.news-row:hover .arrow{transform:translateX(4px);color:var(--accent-2);}
.empty-state{
  min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
  border:1px dashed var(--line);border-radius:var(--r-md);background:var(--paper-2);text-align:center;padding:32px 20px;
}
.empty-state svg{color:var(--ink-300);}
.empty-state p{font-size:14px;color:var(--ink-500);}
.empty-state a{font-size:14px;font-weight:600;color:var(--ink-900);border-bottom:2px solid var(--accent);}
.empty-state a:hover{color:var(--accent-2);}

/* ========== 流程 ========== */
.flow-grid{display:grid;gap:20px;}
@media (min-width:768px){.flow-grid{grid-template-columns:repeat(3,1fr);gap:24px;}}
.flow-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.flow-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);}
.flow-card .step{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-300);
}
.flow-card h3{font-size:19px;margin-top:12px;}
.flow-card p{margin-top:10px;font-size:14px;line-height:1.8;color:var(--ink-500);}

/* ========== FAQ ========== */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 20px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16px;font-weight:600;color:var(--ink-900);
}
.faq-q:hover{color:var(--accent-2);}
.faq-icon{
  flex:none;width:24px;height:24px;display:grid;place-items:center;
  font-size:20px;line-height:1;color:var(--ink-500);
  transition:transform .22s ease-out,color .22s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--accent-2);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .22s ease-out;}
.faq-a p{padding:0 20px 20px;font-size:15px;line-height:1.9;color:var(--ink-500);}

/* ========== 表单 ========== */
.lead-band{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.lead-grid{display:grid;gap:36px;}
@media (min-width:1024px){.lead-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:64px;align-items:start;}}
.lead-info h2{font-size:clamp(24px,3vw,36px);}
.lead-info p{margin-top:16px;color:var(--ink-500);font-size:15px;}
.lead-points{margin-top:24px;display:grid;gap:12px;}
.lead-points li{display:flex;gap:10px;font-size:14px;color:var(--ink-700);}
.lead-points li::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:10px;}
.form-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--sh-1);}
@media (min-width:768px){.form-card{padding:32px;}}
.form-grid{display:grid;gap:16px;}
@media (min-width:768px){.form-grid{grid-template-columns:repeat(2,1fr);}}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1/-1;}
.field label{font-size:14px;font-weight:500;color:var(--ink-900);}
.field input,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--paper-2);color:var(--ink-900);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{min-height:104px;resize:vertical;line-height:1.75;}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300);}
.field input:focus,.field textarea:focus{outline:0;border-color:var(--accent-2);box-shadow:0 0 0 3px rgba(108,77,255,.18);}
.field.error input,.field.error textarea{border-color:var(--danger);}
.field .tip{font-size:12px;color:var(--danger);display:none;}
.field.error .tip{display:block;}
.form-submit{margin-top:20px;width:100%;height:52px;}
.privacy{
  margin-top:12px;font-size:12px;line-height:1.7;color:var(--ink-500);
}
.privacy a{color:var(--ink-700);border-bottom:1px solid var(--line);}
.privacy a:hover{color:var(--accent-2);border-bottom-color:var(--accent-2);}
.form-done{
  display:none;margin-top:14px;font-size:14px;color:var(--ok);
  background:rgba(18,185,129,.08);border:1px solid rgba(18,185,129,.25);
  border-radius:var(--r-sm);padding:12px 14px;
}
.form-done.show{display:block;}

/* ========== CTA 横幅 ========== */
.cta-banner{
  background:var(--ink-900);border-radius:var(--r-lg);padding:32px 26px;
  display:flex;flex-direction:column;gap:20px;
}
@media (min-width:768px){
  .cta-banner{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 44px;}
}
.cta-banner h2{color:#fff;font-size:clamp(22px,2.6vw,30px);}
.cta-banner p{margin-top:10px;color:rgba(255,255,255,.62);font-size:14px;max-width:620px;}

/* ========== 页脚 ========== */
.site-footer{background:var(--paper);border-top:1px solid var(--line);padding:56px 0 24px;margin-top:64px;}
@media (min-width:1024px){.site-footer{padding:72px 0 28px;margin-top:0;}}
.footer-grid{display:grid;gap:32px;}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:40px;}}
@media (min-width:1024px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.2fr;gap:48px;}}
.footer-brand p{margin-top:14px;font-size:14px;line-height:1.8;color:var(--ink-500);max-width:320px;}
.footer-col h3{font-size:14px;font-weight:600;color:var(--ink-900);letter-spacing:.02em;}
.footer-col ul{margin-top:16px;display:grid;gap:12px;}
.footer-col a{font-size:14px;color:var(--ink-500);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--accent-2);}
.footer-col p{font-size:14px;color:var(--ink-500);line-height:1.8;}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:8px;font-size:12px;color:var(--ink-500);
}
@media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}}

/* ========== 移动端底部 Tab ========== */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  display:flex;align-items:stretch;
  height:calc(56px + env(safe-area-inset-bottom,0px));
  padding-bottom:env(safe-area-inset-bottom,0px);
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
@media (min-width:1024px){.tabbar{display:none;}}
.tab{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10px;color:var(--ink-500);position:relative;min-width:0;
}
.tab svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;}
.tab span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;}
.tab.active{color:var(--accent-2);}
.tab.active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:22px;height:2px;background:var(--accent-2);border-radius:0 0 2px 2px;}
@media (max-width:1023px){
  body{padding-bottom:calc(56px + env(safe-area-inset-bottom,0px));}
}
@media (min-width:1024px){
  body{padding-bottom:0;}
}

/* 移动端浮动获取按钮 */
.float-cta{
  position:fixed;right:16px;bottom:calc(72px + env(safe-area-inset-bottom,0px));z-index:85;
  display:inline-flex;align-items:center;gap:8px;
  height:44px;padding:0 18px;border-radius:var(--r-pill);
  background:var(--ink-900);color:var(--accent);font-size:14px;font-weight:600;
  box-shadow:var(--sh-3);opacity:0;pointer-events:none;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease);
}
.float-cta.show{opacity:1;pointer-events:auto;transform:translateY(0);}
@media (min-width:1024px){.float-cta{display:none;}}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* roulang page: article */
:root{
  --ink-900:#0E0E11;
  --ink-700:#2A2A31;
  --ink-500:#6A6A75;
  --ink-300:#A8A8B3;
  --line:#E6E6E1;
  --paper:#F7F6F2;
  --paper-2:#FFFFFF;
  --accent:#C8FF3D;
  --accent-2:#6C4DFF;
  --danger:#FF5A2B;
  --ok:#12B981;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,14,17,.04);
  --sh-2:0 12px 32px -16px rgba(14,14,17,.14);
  --sh-3:0 24px 60px -28px rgba(14,14,17,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
  padding-bottom:76px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--ink-900);text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--accent-2)}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);letter-spacing:-0.02em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(108,77,255,.30);border-radius:6px}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ===== 阅读进度条 ===== */
.read-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:120;transition:width 90ms linear}

/* ===== 顶部导航 ===== */
.site-header{position:sticky;top:0;z-index:100;background:transparent;transition:background 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);border-bottom:1px solid transparent}
.site-header.is-stuck{background:rgba(247,246,242,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom-color:var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:9px;background:var(--ink-900);color:var(--accent);font-family:var(--font-mono);font-size:14px;font-weight:700;letter-spacing:.02em}
.logo-text{font-size:16px;font-weight:700;color:var(--ink-900);letter-spacing:-0.01em}
.nav-links{display:none;align-items:center;gap:32px}
.nav-links a{position:relative;font-size:16px;font-weight:500;color:var(--ink-700);padding:6px 0;min-height:44px;display:inline-flex;align-items:center}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--accent);transform:scaleX(0);transition:transform 200ms var(--ease)}
.nav-links a:hover{color:var(--accent-2)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink-900);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{display:none}
@media (min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:var(--r-pill);font-weight:600;cursor:pointer;transition:all 200ms var(--ease);text-align:center;min-height:48px;padding:0 24px;font-size:15px}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--accent);color:var(--ink-900);border-color:var(--accent)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);border-color:var(--ink-900);box-shadow:0 0 0 4px rgba(200,255,61,.22)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:#fff}
.btn-lg{min-height:52px;padding:0 30px;font-size:16px}
.btn[disabled],.btn.is-loading{opacity:.6;cursor:not-allowed}
.btn.is-loading::after{content:"";width:14px;height:14px;border-radius:50%;border:2px solid rgba(14,14,17,.25);border-top-color:var(--ink-900);animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== 面包屑 ===== */
.breadcrumb{border-bottom:1px solid var(--line);background:var(--paper-2)}
.breadcrumb .container{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding-top:14px;padding-bottom:14px;font-size:13px;color:var(--ink-500);line-height:1.7}
.breadcrumb a{color:var(--ink-500)}
.breadcrumb a:hover{color:var(--accent-2)}
.breadcrumb .sep{color:var(--ink-300)}
.breadcrumb .current{color:var(--ink-900);font-weight:500;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ===== 文章头部 ===== */
.article-head{padding:40px 0 32px;background:var(--paper-2);border-bottom:1px solid var(--line)}
@media (min-width:768px){.article-head{padding:56px 0 44px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-500);margin-bottom:18px}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent)}
.article-head h1{font-size:clamp(26px,3.4vw,42px);font-weight:800;line-height:1.22;letter-spacing:-0.03em;max-width:22ch}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:22px;font-size:13px;color:var(--ink-500)}
.badge{display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1}
.badge-accent{background:var(--accent);color:var(--ink-900)}
.badge-outline{border:1px solid var(--line);color:var(--ink-700);background:var(--paper-2)}
.meta-num{font-family:var(--font-mono);font-size:13px;color:var(--ink-500)}
.article-hero-figure{margin-top:32px;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);background:var(--paper)}
.article-hero-figure img{width:100%;aspect-ratio:16/7;object-fit:cover}

/* ===== 文章布局 ===== */
.article-wrap{padding:40px 0 64px}
@media (min-width:1024px){.article-wrap{padding:64px 0 96px}}
.article-grid{display:grid;grid-template-columns:1fr;gap:40px}
@media (min-width:1024px){
  .article-grid{grid-template-columns:minmax(0,720px) 240px;gap:56px;align-items:start}
}
.article-main{min-width:0}

/* 正文排版 */
.article-body{font-size:17px;line-height:1.95;color:var(--ink-700)}
.article-body>*+*{margin-top:1.4em}
.article-body p{margin:0}
.article-body h2{font-size:clamp(21px,2.2vw,27px);font-weight:700;line-height:1.35;position:relative;padding-left:22px;margin-top:2.4em;margin-bottom:0}
.article-body h2::before{content:"";position:absolute;left:0;top:.28em;width:6px;height:24px;background:var(--accent);border-radius:2px}
.article-body h3{font-size:19px;font-weight:600;margin-top:2em;color:var(--ink-900)}
.article-body a{color:var(--accent-2);border-bottom:1px solid rgba(108,77,255,.35)}
.article-body a:hover{color:var(--ink-900);border-bottom-color:var(--ink-900)}
.article-body img{border-radius:var(--r-md);border:1px solid var(--line);margin-top:1.6em}
.article-body blockquote{margin:1.8em 0;padding:18px 22px;border-left:3px solid var(--line);background:var(--paper-2);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink-700);font-size:16px;line-height:1.9}
.article-body ul,.article-body ol{padding-left:1.2em}
.article-body ul li{list-style:none;position:relative;padding-left:18px;line-height:1.9}
.article-body ul li::before{content:"";position:absolute;left:0;top:.85em;width:6px;height:6px;border-radius:2px;background:var(--accent)}
.article-body ol{counter-reset:oli;list-style:none;padding-left:0}
.article-body ol li{counter-increment:oli;position:relative;padding-left:34px;line-height:1.9;margin-bottom:.4em}
.article-body ol li::before{content:counter(oli,decimal-leading-zero);position:absolute;left:0;top:0;font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--accent-2)}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin-top:1.6em}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left}
.article-body th{color:var(--ink-900);font-weight:600;background:var(--paper-2)}
.article-body code{font-family:var(--font-mono);font-size:14px;background:var(--paper-2);border:1px solid var(--line);border-radius:6px;padding:2px 6px}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2.4em 0}

/* 侧栏 */
.article-aside{display:none}
@media (min-width:1024px){
  .article-aside{display:block;position:sticky;top:96px}
}
.aside-card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1)}
.aside-card+.aside-card{margin-top:20px}
.aside-card h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--ink-500);text-transform:uppercase;margin-bottom:14px}
.toc-list li+li{margin-top:8px}
.toc-list a{display:block;font-size:14px;line-height:1.6;color:var(--ink-700);padding:4px 0 4px 12px;border-left:2px solid var(--line)}
.toc-list a:hover{color:var(--accent-2);border-left-color:var(--accent-2)}
.aside-links li+li{margin-top:10px}
.aside-links a{font-size:14px;color:var(--ink-700);display:inline-flex;align-items:center;gap:8px}
.aside-links a::before{content:"";width:6px;height:6px;border-radius:2px;background:var(--accent)}
.aside-links a:hover{color:var(--accent-2)}

/* 空态 */
.empty-state{min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;background:var(--paper-2);border:1px dashed var(--line);border-radius:var(--r-lg);padding:48px 24px}
.empty-state svg{width:40px;height:40px;color:var(--ink-300)}
.empty-state p{font-size:15px;color:var(--ink-500)}

/* ===== 通用板块 ===== */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:80px 0}}
.section-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:32px}
.section-head h2{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.25}
.section-head p{margin-top:10px;font-size:15px;color:var(--ink-500);max-width:62ch}
.text-link{font-size:14px;font-weight:600;color:var(--ink-700);display:inline-flex;align-items:center;gap:6px;min-height:44px}
.text-link::after{content:"→";transition:transform 180ms var(--ease)}
.text-link:hover{color:var(--accent-2)}
.text-link:hover::after{transform:translateX(4px)}

/* 相关推荐 */
.rec-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.rec-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rec-card{display:flex;flex-direction:column;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);transition:transform 200ms var(--ease),box-shadow 200ms var(--ease),border-color 200ms var(--ease)}
.rec-card:hover{transform:translateY(-2px);border-color:rgba(108,77,255,.35);box-shadow:var(--sh-2)}
.rec-card img{width:100%;aspect-ratio:16/9;object-fit:cover;background:var(--paper)}
.rec-card .rec-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.rec-card h3{font-size:17px;font-weight:600;line-height:1.45}
.rec-card p{font-size:14px;color:var(--ink-500);line-height:1.75}
.rec-card .rec-foot{margin-top:auto;font-size:13px;color:var(--ink-500);font-family:var(--font-mono)}

/* CTA 横幅 */
.cta-band{background:var(--ink-900);border-radius:var(--r-lg);padding:32px 28px;display:flex;flex-direction:column;gap:20px;align-items:flex-start}
@media (min-width:768px){.cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:40px 44px}}
.cta-band h2{color:#fff;font-size:clamp(20px,2.2vw,28px);font-weight:700;line-height:1.3}
.cta-band p{color:rgba(255,255,255,.66);font-size:15px;margin-top:10px;max-width:52ch}

/* ===== 表单 ===== */
.lead-form{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px 22px;box-shadow:var(--sh-1)}
@media (min-width:768px){.lead-form{padding:44px}}
.form-grid{display:grid;grid-template-columns:1fr;gap:18px}
@media (min-width:768px){.form-grid{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:8px}
.field-full{grid-column:1/-1}
.field label{font-size:14px;font-weight:500;color:var(--ink-900)}
.field input,.field textarea{width:100%;min-height:48px;border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;background:var(--paper);transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease)}
.field textarea{min-height:110px;resize:vertical;line-height:1.7}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent-2);box-shadow:0 0 0 3px rgba(108,77,255,.16)}
.form-privacy{grid-column:1/-1;font-size:12px;line-height:1.7;color:var(--ink-500);margin-top:2px}
.form-privacy a{color:var(--ink-700);border-bottom:1px solid var(--line)}
.form-privacy a:hover{color:var(--accent-2);border-bottom-color:var(--accent-2)}
.form-note{grid-column:1/-1;font-size:13px;color:var(--ok);display:none}
.form-note.is-visible{display:block}

/* ===== 页脚 ===== */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.72);padding:56px 0 32px;margin-top:8px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.site-footer .logo-text{color:#fff}
.site-footer .logo-mark{background:var(--accent);color:var(--ink-900)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:40ch}
.footer-col h3{font-size:14px;font-weight:600;color:#fff;margin-bottom:14px;letter-spacing:.02em}
.footer-col ul li+li{margin-top:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7);min-height:32px;display:inline-flex;align-items:center}
.footer-col a:hover{color:var(--accent)}
.footer-col p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}
.footer-bottom{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-direction:column;gap:8px;font-size:13px;color:rgba(255,255,255,.5)}
@media (min-width:768px){.footer-bottom{flex-direction:row;justify-content:space-between;align-items:center}}

/* ===== 移动端底部 Tab ===== */
.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:110;display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.tabbar a{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;height:56px;font-size:10px;color:var(--ink-500)}
.tabbar a svg{width:22px;height:22px}
.tabbar a.active{color:var(--accent-2)}
.tabbar a.active::before{content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);width:22px;height:2px;background:var(--accent-2);border-radius:2px}
@media (min-width:1024px){.tabbar{display:none}body{padding-bottom:0}}

/* ===== 入场动画 ===== */
.reveal{opacity:0;transform:translateY(14px);transition:opacity 380ms var(--ease),transform 380ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --ink-900:#0E0E11;
  --ink-700:#2A2A31;
  --ink-500:#6A6A75;
  --ink-300:#A8A8B3;
  --line:#E6E6E1;
  --paper:#F7F6F2;
  --paper-2:#FFFFFF;
  --accent:#C8FF3D;
  --accent-2:#6C4DFF;
  --danger:#FF5A2B;
  --ok:#12B981;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,14,17,.04);
  --sh-2:0 12px 32px -16px rgba(14,14,17,.14);
  --sh-3:0 24px 60px -28px rgba(14,14,17,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-700);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--ink-900);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--accent-2)}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;line-height:1.25}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(108,77,255,.30);border-radius:6px}
::selection{background:var(--accent);color:var(--ink-900)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
.narrow{max-width:760px;margin:0 auto}
.section{padding:64px 0}
@media(min-width:768px){.section{padding:88px 0}}
@media(min-width:1024px){.section{padding:112px 0}}
.section-head{margin-bottom:32px}
@media(min-width:768px){.section-head{margin-bottom:48px}}
.section-head h2{font-size:clamp(24px,3vw,38px);letter-spacing:-.02em}
.section-head p{margin-top:14px;color:var(--ink-500);max-width:56ch}
.eyebrow{
  display:inline-block;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-500);margin-bottom:16px;
}
.eyebrow::before{content:"";display:inline-block;width:24px;height:1px;background:var(--accent-2);vertical-align:middle;margin-right:10px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--ink-900);border:1px solid var(--accent)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);border-color:var(--ink-900);box-shadow:0 0 0 4px rgba(200,255,61,.22)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;color:var(--ink-900);border:1px solid var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:#fff}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none;transform:none}
.btn-block{width:100%}

/* ---------- 头部导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  height:72px;display:flex;align-items:center;
  background:transparent;border-bottom:1px solid transparent;
  transition:background-color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.scrolled{
  background:rgba(247,246,242,.88);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:34px;height:34px;border-radius:11px;background:var(--ink-900);color:var(--accent);
  font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.02em;
  display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;
}
.logo-text{font-size:16px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:none;align-items:center;gap:32px}
.nav-links a{
  position:relative;font-size:16px;font-weight:500;color:var(--ink-700);padding:6px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:center;
  transition:transform .18s var(--ease);
}
.nav-links a:hover{color:var(--ink-900)}
.nav-links a:hover::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink-900);font-weight:600}
.nav-links a.active::after{transform:scaleX(1)}
.nav-cta{display:none}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
}
@media(max-width:1023px){
  .site-header{height:56px}
  .logo-text{font-size:14px;max-width:190px;overflow:hidden;text-overflow:ellipsis}
  .logo-mark{width:30px;height:30px;font-size:12px;border-radius:9px}
}

/* ---------- 内页首屏 ---------- */
.page-hero{
  position:relative;
  padding:120px 0 56px;
  background-image:
    linear-gradient(180deg,rgba(247,246,242,.93) 0%,rgba(247,246,242,.985) 62%,rgba(247,246,242,1) 100%),
    url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--line);
}
@media(min-width:768px){.page-hero{padding:150px 0 84px}}
.hero-grid{display:grid;grid-template-columns:1fr;gap:40px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.12fr .88fr;gap:56px}}
.hero-title{
  font-size:clamp(34px,5.2vw,60px);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.1;
  margin:6px 0 18px;
}
.hero-lead{font-size:17px;line-height:1.9;color:var(--ink-700);max-width:44ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--sh-3);background:var(--paper-2);
}
.hero-media img{width:100%;height:100%;min-height:240px;max-height:360px;object-fit:cover}
.hero-facts{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:500;line-height:1;
}
.badge-accent{background:var(--accent);color:var(--ink-900)}
.badge-line{border:1px solid var(--line);color:var(--ink-700);background:var(--paper-2)}

/* ---------- 步条 ---------- */
.flow-steps{counter-reset:step;display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.flow-steps{grid-template-columns:repeat(3,1fr);gap:24px}}
.flow-steps li{
  position:relative;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:28px 24px 26px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.flow-steps li:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35)}
.flow-steps li::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  display:block;font-family:var(--font-mono);font-size:13px;font-weight:700;
  color:var(--ink-900);background:var(--accent);border-radius:var(--r-pill);
  padding:3px 10px;width:fit-content;margin-bottom:16px;letter-spacing:.06em;
}
.flow-steps h3{font-size:19px;margin-bottom:10px}
.flow-steps p{font-size:15px;color:var(--ink-500);line-height:1.8}

/* ---------- 大号编号小节 ---------- */
.rule-list{display:flex;flex-direction:column;gap:0}
.rule-block{
  display:grid;grid-template-columns:1fr;gap:16px;
  padding:40px 0;border-top:1px solid var(--line);
}
.rule-block:first-child{border-top:none;padding-top:0}
@media(min-width:768px){
  .rule-block{grid-template-columns:96px 1fr;gap:32px;padding:56px 0}
}
.rule-index{
  font-family:var(--font-mono);font-weight:800;line-height:1;
  font-size:clamp(40px,6vw,72px);letter-spacing:-.05em;color:var(--ink-900);opacity:.14;
}
.rule-body h2{font-size:clamp(21px,2.4vw,27px);letter-spacing:-.02em;margin-bottom:16px}
.rule-body h2::before{
  content:"";display:block;width:24px;height:3px;background:var(--accent);border-radius:2px;margin-bottom:16px;
}
.rule-body p{font-size:16.5px;line-height:1.95;color:var(--ink-700)}
.brace-list{counter-reset:brace;margin-top:22px}
.brace-list li{
  counter-increment:brace;position:relative;padding:14px 0 14px 58px;
  border-bottom:1px solid var(--line);font-size:15.5px;color:var(--ink-700);line-height:1.85;
}
.brace-list li:first-child{border-top:1px solid var(--line)}
.brace-list li::before{
  content:"（" counter(brace,decimal-leading-zero) "）";
  position:absolute;left:0;top:14px;font-family:var(--font-mono);
  font-size:13.5px;font-weight:700;color:var(--accent-2);letter-spacing:-.02em;
}
.brace-list strong{color:var(--ink-900);font-weight:600}

/* ---------- 规则速览数据 ---------- */
.stat-strip{
  display:grid;grid-template-columns:repeat(2,1fr);gap:0;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
@media(min-width:768px){.stat-strip{grid-template-columns:repeat(4,1fr)}}
.stat-item{padding:28px 20px;border-right:1px solid var(--line)}
.stat-item:nth-child(2n){border-right:none}
@media(min-width:768px){
  .stat-item:nth-child(2n){border-right:1px solid var(--line)}
  .stat-item:last-child{border-right:none}
}
.stat-num{font-family:var(--font-mono);font-size:clamp(32px,4.4vw,48px);font-weight:700;color:var(--ink-900);line-height:1;letter-spacing:-.04em}
.stat-num span{font-size:16px;font-weight:600;margin-left:4px;letter-spacing:0}
.stat-label{margin-top:12px;font-size:14px;color:var(--ink-500);line-height:1.7}
.stat-note{margin-top:20px;font-size:13px;color:var(--ink-300)}

/* ---------- 对照说明卡 ---------- */
.compare-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.compare-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
.compare-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 26px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.compare-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35)}
.compare-card h3{font-size:18px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.compare-card h3 .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}
.compare-card ul li{
  position:relative;padding:10px 0 10px 18px;font-size:15px;color:var(--ink-500);line-height:1.8;
  border-bottom:1px dashed var(--line);
}
.compare-card ul li:last-child{border-bottom:none}
.compare-card ul li::before{content:"";position:absolute;left:0;top:19px;width:6px;height:1px;background:var(--ink-300)}

/* ---------- 图文块 ---------- */
.split{display:grid;grid-template-columns:1fr;gap:32px;align-items:center}
@media(min-width:1024px){.split{grid-template-columns:.92fr 1.08fr;gap:56px}}
.split-media{border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-2);background:var(--paper-2)}
.split-media img{width:100%;height:100%;min-height:240px;object-fit:cover}
.split-body h2{font-size:clamp(23px,2.8vw,34px);letter-spacing:-.02em;margin-bottom:18px}
.split-body p{color:var(--ink-700);font-size:16.5px;line-height:1.95}
.split-body .brace-list li{font-size:15.5px}

/* ---------- 列表行 ---------- */
.row-list{border-top:1px solid var(--line)}
.row-list li{border-bottom:1px solid var(--line)}
.row-list a{
  display:flex;align-items:center;gap:16px;padding:18px 4px;
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.row-list a:hover{background:var(--paper-2);padding-left:12px}
.row-list a:hover .row-title{color:var(--accent-2)}
.row-num{font-family:var(--font-mono);font-size:13px;color:var(--ink-300);flex-shrink:0;width:28px}
.row-title{font-size:16px;font-weight:600;color:var(--ink-900);transition:color .18s var(--ease)}
.row-desc{display:block;font-size:14px;color:var(--ink-500);font-weight:400;margin-top:4px}
.row-arrow{margin-left:auto;color:var(--ink-300);flex-shrink:0;font-size:18px;line-height:1}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:56px;padding:16px 4px;text-align:left;font-size:16.5px;font-weight:600;color:var(--ink-900);
  transition:color .18s var(--ease);
}
.faq-q:hover{color:var(--accent-2)}
.faq-icon{
  position:relative;width:20px;height:20px;flex-shrink:0;
  transition:transform .22s ease-out;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink-900);border-radius:2px;
  transition:background-color .18s var(--ease);
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-item.open .faq-icon::before,.faq-item.open .faq-icon::after{background:var(--accent-2)}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .22s ease-out;
}
.faq-a p{padding:0 48px 22px 4px;font-size:15px;line-height:1.9;color:var(--ink-500)}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  background:var(--ink-900);border-radius:var(--r-lg);padding:36px 28px;
  display:flex;flex-direction:column;gap:22px;
  box-shadow:var(--sh-3);
}
@media(min-width:768px){
  .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:46px 48px;gap:40px}
}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);letter-spacing:-.02em}
.cta-band p{color:rgba(255,255,255,.66);font-size:15px;margin-top:10px;max-width:46ch}
.cta-band .btn-primary{flex-shrink:0}

/* ---------- 站内互链 ---------- */
.link-cards{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.link-cards{grid-template-columns:repeat(3,1fr);gap:24px}}
.link-card{
  display:block;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);color:var(--ink-900)}
.link-card .badge{margin-bottom:16px}
.link-card h3{font-size:18px;margin-bottom:10px}
.link-card p{font-size:14.5px;color:var(--ink-500);line-height:1.8}
.link-card .more{display:inline-block;margin-top:16px;font-size:14px;font-weight:600;color:var(--accent-2)}

/* ---------- 表单 ---------- */
.form-panel{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 24px;box-shadow:var(--sh-2);
}
@media(min-width:768px){.form-panel{padding:44px 48px}}
.form-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media(min-width:768px){.form-grid{grid-template-columns:repeat(2,1fr);gap:24px}}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;font-weight:500;color:var(--ink-700)}
.field input,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--paper);color:var(--ink-900);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.field textarea{min-height:120px;resize:vertical;line-height:1.8}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field textarea:focus{
  outline:none;background:var(--paper-2);border-color:var(--accent-2);
  box-shadow:0 0 0 3px rgba(108,77,255,.30);
}
.field.error input,.field.error textarea{border-color:var(--danger);box-shadow:none}
.field .tip{font-size:12px;color:var(--danger);display:none}
.field.error .tip{display:block}
.privacy{margin-top:12px;font-size:12px;color:var(--ink-500);line-height:1.7}
.privacy a{color:var(--ink-500);text-decoration:underline;text-underline-offset:3px}
.privacy a:hover{color:var(--accent-2)}
.form-ok{
  display:none;margin-top:18px;padding:14px 16px;border-radius:var(--r-sm);
  border:1px solid rgba(18,185,129,.35);background:rgba(18,185,129,.08);
  color:#0b7a56;font-size:14px;
}
.form-ok.show{display:block}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--paper);border-top:1px solid var(--line);padding:56px 0 28px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}}
.footer-brand p{margin-top:16px;font-size:14.5px;color:var(--ink-500);line-height:1.85;max-width:38ch}
.footer-col h3{font-size:14px;font-weight:600;color:var(--ink-900);margin-bottom:16px;letter-spacing:.02em}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14.5px;color:var(--ink-500)}
.footer-col ul li a:hover{color:var(--accent-2)}
.footer-col p{font-size:14.5px;color:var(--ink-500);line-height:1.85;margin-bottom:12px}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--ink-500);
}
@media(min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}

/* ---------- 移动底部 Tab ---------- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:flex;align-items:stretch;height:56px;
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.96);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-top:1px solid var(--line);
}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:10px;color:var(--ink-500);position:relative;transition:color .18s var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.tab-item::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%) scaleX(0);
  width:22px;height:2px;border-radius:2px;background:var(--accent-2);transition:transform .18s var(--ease);
}
.tab-item.active{color:var(--accent-2)}
.tab-item.active::before{transform:translateX(-50%) scaleX(1)}
@media(min-width:1024px){.tabbar{display:none}}
@media(max-width:1023px){body{padding-bottom:76px}}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .38s var(--ease),transform .38s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#0E0E11;
  --ink-700:#2A2A31;
  --ink-500:#6A6A75;
  --ink-300:#A8A8B3;
  --line:#E6E6E1;
  --paper:#F7F6F2;
  --paper-2:#FFFFFF;
  --accent:#C8FF3D;
  --accent-2:#6C4DFF;
  --danger:#FF5A2B;
  --ok:#12B981;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,14,17,.04);
  --sh-2:0 12px 32px -16px rgba(14,14,17,.14);
  --sh-3:0 24px 60px -28px rgba(14,14,17,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink-700);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ink-900);text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
button,input,textarea,select{font-family:inherit;font-size:inherit;color:inherit;}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(108,77,255,.30);border-radius:6px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:20px;
  padding-right:20px;
}
.mono{font-family:ui-monospace,"JetBrains Mono",monospace;font-variant-numeric:tabular-nums;}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(247,246,242,.72);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(247,246,242,.88);
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  height:72px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.logo-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;height:34px;
  border-radius:10px;
  background:var(--ink-900);
  color:var(--accent);
  font-size:13px;
  font-weight:800;
  letter-spacing:.02em;
}
.logo-text{
  font-size:16px;
  font-weight:700;
  color:var(--ink-900);
  letter-spacing:-.01em;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:32px;
  margin-left:auto;
  margin-right:8px;
}
.nav-links a{
  position:relative;
  font-size:16px;
  font-weight:500;
  color:var(--ink-700);
  padding:6px 0;
  transition:color .18s var(--ease);
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:center;
  transition:transform .18s var(--ease);
}
.nav-links a:hover{color:var(--accent-2);}
.nav-links a:hover::after,
.nav-links a.active::after{transform:scaleX(1);}
.nav-links a.active{color:var(--ink-900);font-weight:600;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1px solid transparent;
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--accent);color:var(--ink-900);}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);box-shadow:0 0 0 4px rgba(200,255,61,.22);}
.btn-ghost{background:transparent;border-color:var(--ink-900);color:var(--ink-900);}
.btn-ghost:hover{background:var(--ink-900);color:#fff;}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none;}

/* ---------- breadcrumb ---------- */
.crumb{
  padding:24px 0 0;
  font-size:13px;
  color:var(--ink-500);
}
.crumb ol{display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
.crumb li::after{content:"/";margin-left:8px;color:var(--ink-300);}
.crumb li:last-child::after{content:"";margin:0;}
.crumb a{color:var(--ink-500);}
.crumb a:hover{color:var(--accent-2);}

/* ---------- hero ---------- */
.cat-hero{
  padding:32px 0 56px;
  border-bottom:1px solid var(--line);
}
.hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:26px;
  padding:0 12px;
  border-radius:var(--r-pill);
  background:var(--accent);
  color:var(--ink-900);
  font-size:12px;
  font-weight:600;
  margin-bottom:20px;
}
.cat-hero h1{
  font-size:clamp(34px,5.2vw,60px);
  font-weight:800;
  letter-spacing:-.03em;
  line-height:1.1;
  color:var(--ink-900);
  max-width:18em;
}
.cat-hero .lede{
  margin-top:18px;
  font-size:17px;
  color:var(--ink-500);
  max-width:44em;
}
.hero-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin-top:40px;
  border-top:1px solid var(--line);
}
.hero-strip div{
  padding:22px 20px 0 0;
  border-right:1px solid var(--line);
}
.hero-strip div:last-child{border-right:none;padding-right:0;}
.hero-strip .num{
  font-size:30px;
  font-weight:700;
  color:var(--ink-900);
  line-height:1.2;
}
.hero-strip .num small{font-size:14px;font-weight:600;margin-left:4px;color:var(--ink-500);}
.hero-strip .cap{font-size:13px;color:var(--ink-500);margin-top:4px;}

/* ---------- layout ---------- */
.main-wrap{padding:64px 0 72px;}
.layout{
  display:grid;
  grid-template-columns:240px minmax(0,1fr);
  gap:48px;
  align-items:start;
}
.toc{
  position:sticky;
  top:96px;
  background:var(--paper-2);
  border:1px solid var(--line);
  border-radius:var(--r-md);
  padding:22px 20px;
  box-shadow:var(--sh-1);
}
.toc h2{
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--ink-500);
  margin-bottom:14px;
  text-transform:uppercase;
}
.toc ol{display:flex;flex-direction:column;gap:2px;}
.toc a{
  display:block;
  padding:8px 10px;
  border-radius:var(--r-sm);
  font-size:14px;
  color:var(--ink-700);
  border-left:2px solid transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.toc a:hover{background:var(--paper);color:var(--accent-2);border-left-color:var(--accent-2);}
.toc a.active{color:var(--ink-900);font-weight:600;border-left-color:var(--accent);background:var(--paper);}
.toc .toc-foot{
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:12px;
  color:var(--ink-500);
  line-height:1.7;
}

/* ---------- sections ---------- */
.section{
  padding:0 0 64px;
}
.section + .section{padding-top:8px;}
.section-head{margin-bottom:32px;}
.section-head .kicker{
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
  color:var(--accent-2);
  text-transform:uppercase;
}
.section-head h2{
  margin-top:10px;
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  line-height:1.25;
  letter-spacing:-.02em;
  color:var(--ink-900);
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  color:var(--ink-500);
  max-width:52em;
}
.prose p{margin-bottom:1.35em;font-size:17px;line-height:1.95;color:var(--ink-700);}
.prose p:last-child{margin-bottom:0;}
.prose strong{color:var(--ink-900);font-weight:600;}

.banner{
  margin:0 0 64px;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  position:relative;
  background:var(--paper-2);
}
.banner img{width:100%;height:280px;object-fit:cover;}
.banner .banner-cap{
  padding:18px 24px;
  font-size:13px;
  color:var(--ink-500);
  border-top:1px solid var(--line);
  background:var(--paper-2);
}

/* ---------- entry list ---------- */
.entry-list{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--paper-2);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.entry-row{
  display:grid;
  grid-template-columns:64px minmax(0,1fr) 40px;
  align-items:center;
  gap:20px;
  padding:22px 24px;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease),transform .18s var(--ease);
}
.entry-row:last-child{border-bottom:none;}
.entry-row:hover{background:var(--paper);}
.entry-row:hover .entry-title{color:var(--accent-2);}
.entry-row:hover .entry-arrow{transform:translateX(4px);color:var(--accent-2);}
.entry-idx{
  font-size:30px;
  font-weight:700;
  color:var(--accent);
  font-family:ui-monospace,"JetBrains Mono",monospace;
  line-height:1;
  -webkit-text-stroke:.5px rgba(14,14,17,.35);
}
.entry-title{
  font-size:18px;
  font-weight:600;
  color:var(--ink-900);
  transition:color .18s var(--ease);
}
.entry-desc{
  margin-top:6px;
  font-size:14px;
  color:var(--ink-500);
  line-height:1.7;
}
.entry-arrow{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  border-radius:var(--r-pill);
  border:1px solid var(--line);
  color:var(--ink-500);
  transition:transform .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}

/* ---------- steps ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.step{
  padding:26px 24px;
  border:1px solid var(--line);
  border-top:3px solid var(--ink-900);
  border-radius:var(--r-md);
  background:var(--paper-2);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.step:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);}
.step .sno{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:13px;
  font-weight:700;
  color:var(--ink-500);
  letter-spacing:.08em;
}
.step h3{
  margin-top:12px;
  font-size:20px;
  font-weight:600;
  color:var(--ink-900);
}
.step p{margin-top:10px;font-size:14px;color:var(--ink-500);line-height:1.8;}

/* ---------- note list ---------- */
.note-list{border-top:1px solid var(--line);}
.note-list li{
  display:flex;
  gap:18px;
  padding:18px 0;
  border-bottom:1px solid var(--line);
}
.note-list .dot{
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:11px;
  border-radius:50%;
  background:var(--accent);
}
.note-list .nt{font-size:16px;font-weight:600;color:var(--ink-900);}
.note-list .nd{font-size:14px;color:var(--ink-500);margin-top:4px;line-height:1.75;}

/* ---------- compare table ---------- */
.compare{
  width:100%;
  border-collapse:collapse;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--paper-2);
  font-size:15px;
}
.compare th,.compare td{
  text-align:left;
  padding:16px 20px;
  border-bottom:1px solid var(--line);
}
.compare th{
  font-size:13px;
  font-weight:600;
  color:var(--ink-500);
  background:var(--paper);
  letter-spacing:.04em;
}
.compare td{color:var(--ink-700);}
.compare tr:last-child td{border-bottom:none;}

/* ---------- cross links ---------- */
.cross-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.cross-card{
  display:flex;
  flex-direction:column;
  border:1px solid var(--line);
  border-radius:var(--r-md);
  background:var(--paper-2);
  overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.cross-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);}
.cross-card img{height:150px;width:100%;object-fit:cover;background:var(--paper);}
.cross-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1;}
.cross-body h3{font-size:18px;font-weight:600;color:var(--ink-900);}
.cross-body p{font-size:14px;color:var(--ink-500);line-height:1.75;flex:1;}
.cross-more{
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.cross-card:hover .cross-more{color:var(--accent-2);}

/* ---------- cta band ---------- */
.cta-band{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  padding:40px 44px;
  border-radius:var(--r-lg);
  background:var(--ink-900);
  color:#fff;
}
.cta-band h2{
  font-size:clamp(22px,2.6vw,30px);
  font-weight:700;
  letter-spacing:-.02em;
  color:#fff;
  line-height:1.3;
}
.cta-band p{
  margin-top:10px;
  font-size:15px;
  color:rgba(255,255,255,.66);
  max-width:38em;
  line-height:1.8;
}
.cta-band .btn-primary:hover{background:#fff;color:var(--ink-900);box-shadow:0 0 0 4px rgba(200,255,61,.22);}

/* ---------- form ---------- */
.form-panel{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  background:var(--paper-2);
  padding:40px 44px;
  box-shadow:var(--sh-1);
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  margin-top:28px;
}
.field{display:flex;flex-direction:column;gap:8px;}
.field.full{grid-column:1 / -1;}
.field label{font-size:14px;font-weight:500;color:var(--ink-700);}
.field input,
.field textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:var(--paper-2);
  padding:13px 14px;
  font-size:15px;
  color:var(--ink-900);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field input{height:48px;padding-top:0;padding-bottom:0;}
.field textarea{min-height:120px;resize:vertical;line-height:1.8;}
.field input::placeholder,
.field textarea::placeholder{color:var(--ink-300);}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:var(--accent-2);
  box-shadow:0 0 0 3px rgba(108,77,255,.18);
}
.field .hint{font-size:12px;color:var(--ink-500);}
.form-submit{
  margin-top:26px;
  width:100%;
  height:52px;
}
.form-privacy{
  margin-top:12px;
  font-size:12px;
  color:var(--ink-500);
  line-height:1.7;
}
.form-privacy a{color:var(--ink-700);text-decoration:underline;text-underline-offset:2px;}
.form-privacy a:hover{color:var(--accent-2);}
.form-msg{
  margin-top:14px;
  font-size:14px;
  display:none;
}
.form-msg.ok{display:block;color:var(--ok);}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--paper-2);
  margin-top:80px;
  padding:56px 0 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  color:var(--ink-500);
  line-height:1.8;
  max-width:34em;
}
.footer-col h3{
  font-size:14px;
  font-weight:600;
  color:var(--ink-900);
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{font-size:14px;color:var(--ink-500);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--accent-2);}
.footer-col p{font-size:14px;color:var(--ink-500);line-height:1.8;margin-bottom:14px;}
.footer-bottom{
  margin-top:44px;
  padding-top:20px;
  border-top:1px solid var(--line);
  display:flex;
  justify-content:space-between;
  gap:16px;
  font-size:13px;
  color:var(--ink-500);
  flex-wrap:wrap;
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  display:none;
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:70;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.mobile-tab ul{
  display:grid;
  grid-template-columns:repeat(5,1fr);
  height:56px;
}
.mobile-tab a{
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:3px;
  font-size:10px;
  color:var(--ink-500);
  position:relative;
  transition:color .18s var(--ease);
}
.mobile-tab a svg{width:22px;height:22px;stroke-width:1.7;}
.mobile-tab a.active{color:var(--accent-2);}
.mobile-tab a.active::before{
  content:"";
  position:absolute;
  top:0;left:50%;
  transform:translateX(-50%);
  width:22px;height:2px;
  background:var(--accent-2);
  border-radius:0 0 2px 2px;
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .38s var(--ease),transform .38s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .nav-links{display:none;}
  .nav-inner{height:56px;gap:12px;}
  .logo-text{font-size:14px;}
  .nav-cta{margin-left:auto;height:40px;padding:0 16px;font-size:13px;}
  .mobile-tab{display:block;}
  body{padding-bottom:76px;}
  .layout{grid-template-columns:1fr;gap:36px;}
  .toc{position:static;}
  .steps{grid-template-columns:1fr;}
  .cross-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .hero-strip{grid-template-columns:1fr 1fr;}
  .hero-strip div{padding:18px 16px 0 0;border-right:none;border-bottom:1px solid var(--line);}
  .hero-strip div:nth-child(odd){border-right:1px solid var(--line);}
  .hero-strip div:nth-last-child(-n+2){border-bottom:none;}
  .banner img{height:220px;}
}
@media (max-width:767px){
  .container{padding-left:20px;padding-right:20px;}
  .cat-hero{padding:20px 0 44px;}
  .cat-hero h1{font-size:clamp(30px,8vw,40px);}
  .main-wrap{padding:44px 0 56px;}
  .section{padding-bottom:52px;}
  .entry-row{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px;}
  .entry-idx{font-size:24px;}
  .entry-arrow{display:none;}
  .entry-title{font-size:16px;}
  .cross-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;padding:28px 24px;gap:22px;}
  .cta-band .btn{width:100%;}
  .form-panel{padding:26px 20px;}
  .form-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
  .compare th,.compare td{padding:12px 14px;font-size:14px;}
  .banner img{height:180px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink-900:#0E0E11;
  --ink-700:#2A2A31;
  --ink-500:#6A6A75;
  --ink-300:#A8A8B3;
  --line:#E6E6E1;
  --paper:#F7F6F2;
  --paper-2:#FFFFFF;
  --accent:#C8FF3D;
  --accent-2:#6C4DFF;
  --danger:#FF5A2B;
  --ok:#12B981;
  --r-sm:10px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,14,17,.04);
  --sh-2:0 12px 32px -16px rgba(14,14,17,.14);
  --sh-3:0 24px 60px -28px rgba(14,14,17,.20);
  --ease:cubic-bezier(.2,.7,.3,1);
  --w:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink-900);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--ink-900);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--accent-2)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(108,77,255,.30);border-radius:6px}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

/* ---------- 通用文本 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;color:var(--ink-500);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--accent)}
.section-title{font-size:clamp(24px,3vw,38px);font-weight:700;line-height:1.25;letter-spacing:-.02em}
.section-desc{margin-top:14px;color:var(--ink-500);max-width:640px}
.section{padding:64px 0}
@media(min-width:768px){.section{padding:112px 0}}
.section-alt{background:var(--paper-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:32px}
@media(min-width:768px){.section-head{margin-bottom:48px}}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 22px;border-radius:var(--r-pill);
  font-size:16px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;background:transparent;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),transform .18s var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--accent);color:var(--ink-900);border-color:var(--accent)}
.btn-primary:hover{background:var(--ink-900);color:var(--accent);border-color:var(--ink-900);box-shadow:0 0 0 4px rgba(200,255,61,.22)}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{border-color:var(--ink-900);color:var(--ink-900)}
.btn-ghost:hover{background:var(--ink-900);color:var(--paper-2)}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px}
.btn-block{width:100%;min-height:52px}
.btn:disabled{background:var(--ink-300);border-color:var(--ink-300);color:var(--paper-2);cursor:not-allowed;box-shadow:none}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;
  border-radius:var(--r-pill);font-size:12px;font-weight:500;line-height:1;
}
.badge-accent{background:var(--accent);color:var(--ink-900)}
.badge-line{border:1px solid var(--line);color:var(--ink-700)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.82);
  transition:background .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(247,246,242,.88);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:700}
.logo-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;background:var(--ink-900);
  color:var(--accent);font-size:13px;font-weight:800;letter-spacing:.04em;
  font-family:ui-monospace,"JetBrains Mono",monospace;
}
.logo-text{font-size:16px;font-weight:700;letter-spacing:-.01em}
.nav-links{display:none;align-items:center;gap:32px}
.nav-links a{position:relative;font-size:16px;font-weight:500;padding:6px 0}
.nav-links a::after{
  content:"";position:absolute;left:50%;bottom:0;height:2px;width:100%;
  background:var(--accent);transform:translateX(-50%) scaleX(0);
  transform-origin:center;transition:transform .2s var(--ease);
}
.nav-links a:hover::after,.nav-links a:focus-visible::after{transform:translateX(-50%) scaleX(1)}
.nav-links a.active::after{transform:translateX(-50%) scaleX(1)}
.nav-links a.active{color:var(--ink-900)}
.nav-cta{display:none}
@media(min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
}

/* ---------- 首屏 ---------- */
.page-hero{padding:40px 0 48px;position:relative}
@media(min-width:768px){.page-hero{padding:64px 0 72px}}
.hero-grid{display:grid;gap:36px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px}}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-500);margin-bottom:20px}
.crumb a{color:var(--ink-500)}
.crumb a:hover{color:var(--accent-2)}
.crumb span[aria-hidden]{color:var(--ink-300)}
.hero-copy .badge{margin-bottom:16px}
.page-hero h1{
  font-size:clamp(34px,5.2vw,68px);font-weight:800;line-height:1.1;
  letter-spacing:-.03em;margin-bottom:20px;
}
.hero-sub{font-size:17px;color:var(--ink-500);max-width:520px;line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--paper);
  box-shadow:var(--sh-3);aspect-ratio:4/3;
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,14,17,0) 55%,rgba(14,14,17,.28));
}

/* ---------- 状态条 ---------- */
.status-bar{background:var(--ink-900);color:var(--paper)}
.status-inner{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px 22px;
  padding:14px 20px;font-size:13px;color:var(--ink-300);
}
@media(min-width:768px){.status-inner{padding:14px 32px}}
.status-dot{
  width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(200,255,61,.18);flex:0 0 8px;
}
.status-inner strong{color:var(--paper);font-weight:600}
.status-sep{width:1px;height:12px;background:rgba(255,255,255,.18);display:none}
@media(min-width:768px){.status-sep{display:inline-block}}

/* ---------- 数据区 ---------- */
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:28px 20px}
@media(min-width:1024px){
  .stats{grid-template-columns:repeat(4,1fr);gap:0}
  .stat{padding:0 28px;border-left:1px solid var(--line)}
  .stat:first-child{border-left:0;padding-left:0}
}
.stat-num{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:clamp(38px,5vw,54px);font-weight:700;line-height:1;
  letter-spacing:-.04em;color:var(--ink-900);display:inline-block;
}
.stat-unit{font-size:15px;color:var(--ink-500);margin-left:6px;font-weight:500}
.stat-label{margin-top:10px;font-size:14px;color:var(--ink-500)}

/* ---------- FAQ 布局 ---------- */
.faq-layout{display:grid;gap:32px;grid-template-columns:minmax(0,1fr)}
@media(min-width:1024px){.faq-layout{grid-template-columns:minmax(0,1fr) 320px;gap:40px}}
.faq-grid{display:grid;gap:14px;grid-template-columns:minmax(0,1fr)}
@media(min-width:1024px){.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}}
.faq-item{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);transition:border-color .2s var(--ease),box-shadow .2s var(--ease),transform .2s var(--ease);
  align-self:start;
}
.faq-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.30)}
.faq-item[open]{border-color:rgba(108,77,255,.35);box-shadow:var(--sh-2)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:16px 18px;font-size:16px;font-weight:600;
  cursor:pointer;list-style:none;line-height:1.5;
}
.faq-q::-webkit-details-marker{display:none}
.faq-q::marker{content:""}
.faq-icon{
  position:relative;flex:0 0 24px;width:24px;height:24px;border-radius:50%;
  background:var(--paper);border:1px solid var(--line);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;top:50%;left:50%;
  background:var(--ink-900);transform:translate(-50%,-50%);
  transition:transform .22s ease-out,opacity .22s ease-out;
}
.faq-icon::before{width:10px;height:2px}
.faq-icon::after{width:2px;height:10px}
.faq-item[open] .faq-icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0}
.faq-item[open] .faq-icon{background:var(--accent);border-color:var(--accent)}
.faq-a{padding:0 18px 18px;font-size:15px;line-height:1.9;color:var(--ink-500);border-top:1px solid var(--line);padding-top:14px;margin:0 18px 18px;padding-left:0;padding-right:0}

/* ---------- 粘性咨询卡 ---------- */
.aside-card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 22px;box-shadow:var(--sh-2);
}
@media(min-width:1024px){.aside-card{position:sticky;top:96px}}
.aside-card h3{font-size:19px;font-weight:700;letter-spacing:-.01em;margin-bottom:12px}
.aside-card p{font-size:15px;color:var(--ink-500);line-height:1.85;margin-bottom:18px}
.aside-list{border-top:1px solid var(--line);margin-top:18px;padding-top:16px}
.aside-list li{display:flex;gap:10px;font-size:14px;color:var(--ink-700);padding:7px 0}
.aside-list li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 6px;margin-top:9px}
.aside-note{margin-top:16px;font-size:12px;color:var(--ink-500);line-height:1.7}

/* ---------- 三步排查 ---------- */
.steps{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:768px){.steps{grid-template-columns:repeat(3,1fr);gap:24px}}
.step{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 22px;box-shadow:var(--sh-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.step:hover{transform:translateY(-2px);border-color:rgba(108,77,255,.35);box-shadow:var(--sh-2)}
.step-num{
  font-family:ui-monospace,"JetBrains Mono",monospace;
  font-size:32px;font-weight:700;color:var(--accent);display:block;line-height:1;
  text-shadow:0 0 0 currentColor;
}
.step h3{font-size:18px;font-weight:700;margin:16px 0 10px}
.step p{font-size:15px;color:var(--ink-500);line-height:1.85}
.step h3 .step-index{color:var(--ink-900);-webkit-text-stroke:0}
.step-num-real{color:var(--ink-900)}

/* ---------- 站内互链 ---------- */
.links-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:768px){.links-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.link-card{
  display:block;background:var(--paper-2);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 22px;box-shadow:var(--sh-1);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(108,77,255,.35);color:var(--ink-900)}
.link-card .badge{margin-bottom:16px}
.link-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.link-card p{font-size:15px;color:var(--ink-500);line-height:1.85}
.link-card .arrow{display:inline-flex;align-items:center;gap:8px;margin-top:18px;font-size:15px;font-weight:600}
.link-card .arrow svg{transition:transform .18s var(--ease)}
.link-card:hover .arrow svg{transform:translateX(4px)}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  background:linear-gradient(rgba(14,14,17,.93),rgba(14,14,17,.93)),url(/assets/images/backpic/back-2.png) center/cover no-repeat;
  border-radius:var(--r-lg);padding:34px 24px;color:var(--paper);
  display:grid;gap:22px;align-items:center;
}
@media(min-width:768px){.cta-band{grid-template-columns:1fr auto;padding:44px 40px;gap:32px}}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.3;letter-spacing:-.02em;color:#fff}
.cta-band p{margin-top:10px;font-size:15px;color:var(--ink-300);line-height:1.8;max-width:560px}

/* ---------- 表单 ---------- */
.lead-wrap{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:1024px){.lead-wrap{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:56px}}
.lead-intro h2{font-size:clamp(24px,3vw,38px);font-weight:700;line-height:1.25;letter-spacing:-.02em}
.lead-intro p{margin-top:16px;color:var(--ink-500);max-width:460px}
.lead-points{margin-top:24px;border-top:1px solid var(--line);padding-top:20px}
.lead-points li{display:flex;gap:10px;padding:8px 0;font-size:15px;color:var(--ink-700)}
.lead-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 6px;margin-top:10px}
.lead-form{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 22px;box-shadow:var(--sh-2);
}
@media(min-width:768px){.lead-form{padding:32px 28px}}
.form-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:768px){.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}}
.field{display:flex;flex-direction:column;gap:8px}
.field-full{grid-column:1/-1}
.field label{font-size:14px;font-weight:500;color:var(--ink-700)}
.field input,.field select,.field textarea{
  width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--paper);color:var(--ink-900);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
  appearance:none;
}
.field textarea{min-height:120px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent-2);background:var(--paper-2);
  box-shadow:0 0 0 3px rgba(108,77,255,.18);
}
.field select{
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236A6A75' stroke-width='2.4' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 16px center;padding-right:40px;
}
.field.has-error input,.field.has-error select,.field.has-error textarea{border-color:var(--danger)}
.field .field-error{font-size:12px;color:var(--danger);line-height:1.6;display:none}
.field.has-error .field-error{display:block}
.form-note{margin-top:14px;font-size:12px;color:var(--ink-500);line-height:1.7}
.form-note a{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px}
.form-status{margin-top:14px;font-size:14px;color:var(--ok);display:none}
.form-status.show{display:block}
.privacy-block{
  margin-top:44px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--paper-2);padding:22px;scroll-margin-top:110px;
}
.privacy-block h3{font-size:16px;font-weight:700;margin-bottom:10px}
.privacy-block p{font-size:13px;color:var(--ink-500);line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding:56px 0 32px;margin-top:0}
.footer-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr);gap:40px}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:48px}}
.footer-brand p{margin-top:16px;font-size:14px;color:var(--ink-500);max-width:320px;line-height:1.85}
.footer-col h3{font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px;color:var(--ink-900)}
.footer-col p{font-size:14px;color:var(--ink-500);line-height:1.85}
.footer-col ul li{padding:6px 0}
.footer-col ul a{font-size:14px;color:var(--ink-500);position:relative}
.footer-col ul a:hover{color:var(--accent-2)}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12px;color:var(--ink-500);line-height:1.8;
}

/* ---------- 移动端底部 Tab ---------- */
.mobile-tabs{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(5,1fr);
  background:var(--paper-2);border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -8px 24px -20px rgba(14,14,17,.4);
}
.tab-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  height:56px;font-size:10px;color:var(--ink-500);position:relative;
  transition:color .18s var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tab-item.active{color:var(--accent-2)}
.tab-item.active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:22px;height:2px;background:var(--accent-2);border-radius:0 0 3px 3px;
}
.tab-item:hover{color:var(--accent-2)}
@media(min-width:1024px){.mobile-tabs{display:none}}
@media(max-width:1023px){body{padding-bottom:76px}}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important;transition:none!important}
}