/* roulang page: index */
:root{
  --brand:#4B3ACB;
  --brand-deep:#2B1F86;
  --brand-soft:#ECE9FB;
  --accent:#14A08A;
  --accent-soft:#E2F4F0;
  --lime:#C9F24D;
  --ink:#171423;
  --ink-2:#4A4553;
  --ink-3:#8A8494;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F2EFEA;
  --line:#E6E2DB;
  --danger:#A2402F;
  --radius-card:16px;
  --radius-btn:8px;
  --radius-input:10px;
  --radius-img:14px;
  --shadow-sm:0 1px 2px rgba(23,20,35,.06);
  --shadow-md:0 1px 2px rgba(23,20,35,.06),0 12px 32px -12px rgba(23,20,35,.12);
  --shadow-lg:0 2px 4px rgba(23,20,35,.06),0 22px 48px -18px rgba(23,20,35,.20);
  --nav-h:68px;
  --sec-pad:110px;
  --container:1240px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  padding:0 0 0;
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;
  line-height:1.9;
  color:var(--ink-2);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,h5,h6{
  margin:0 0 .6em;
  color:var(--ink);
  font-family:inherit;
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.02em;
}
p{margin:0 0 1.2em;line-height:1.9}
p:last-child{margin-bottom:0}
ul,ol{margin:0;padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-deep)}
button{font-family:inherit;cursor:pointer;border:0;background:none}
input,textarea{font-family:inherit;font-size:16px}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.tnum{font-feature-settings:"tnum";font-variant-numeric:tabular-nums}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.sec{padding:var(--sec-pad) 0;position:relative}
.sec-tight{padding:84px 0}
.sec-sand{background:var(--surface-2)}
.sec-ink{background:var(--ink);color:rgba(255,255,255,.72)}
.sec-ink h2,.sec-ink h3{color:#fff}
section[id]{scroll-margin-top:88px}

.sec-head{max-width:720px;margin-bottom:56px}
.sec-tag{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);background:var(--brand-soft);
  padding:6px 14px;border-radius:999px;margin-bottom:18px;
}
.sec-tag::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--lime)}
.sec-head h2{font-size:34px;margin-bottom:14px}
.sec-head p{font-size:17px;color:var(--ink-2);max-width:640px}
.sec-ink .sec-tag{background:rgba(201,242,77,.12);color:var(--lime)}
.sec-ink .sec-head p{color:rgba(255,255,255,.66)}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  height:var(--nav-h);
  transition:background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
  box-shadow:var(--shadow-sm);
}
.nav-split{display:flex;height:100%;align-items:stretch}
.nav-left{flex:0 0 55%;max-width:55%;display:flex;align-items:center;min-width:0}
.nav-left-inner{display:flex;align-items:center;gap:30px;width:100%;padding-left:24px;min-width:0}
.nav-right{flex:1 1 auto;display:flex;align-items:center;justify-content:flex-end;padding-right:24px;min-width:0}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:10px;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#fff;font-size:15px;font-weight:800;letter-spacing:.02em;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-sm);
}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px;min-width:0}
.main-nav a{
  position:relative;
  font-size:15px;font-weight:500;color:var(--ink-2);
  padding:8px 12px;border-radius:8px;white-space:nowrap;
  transition:color .2s var(--ease),background .2s var(--ease);
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--ink);background:rgba(75,58,203,.05)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--brand);font-weight:600}
.main-nav a.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-search{
  display:flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;
  border:1px solid rgba(255,255,255,.45);
  background:rgba(255,255,255,.10);
  color:#fff;transition:all .25s var(--ease);
}
.nav-search i{font-size:13px;opacity:.85}
.nav-search input{
  width:118px;border:0;outline:none;background:transparent;
  color:inherit;font-size:14px;padding:0;
}
.nav-search input::placeholder{color:currentColor;opacity:.7}
.site-header.is-scrolled .nav-search{
  border-color:var(--line);background:var(--surface);color:var(--ink-2);
}
.site-header.is-scrolled .nav-search input{color:var(--ink)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
  border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.12);
}
.nav-toggle span{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:.22s var(--ease)}
.site-header.is-scrolled .nav-toggle{border-color:var(--line);background:var(--surface)}
.site-header.is-scrolled .nav-toggle span{background:var(--ink)}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:all .2s var(--ease);border:1.5px solid transparent;white-space:nowrap;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-light{border-color:rgba(255,255,255,.45);color:#fff}
.btn-light:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-block{width:100%}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--brand);
  position:relative;padding-bottom:3px;
}
.link-arrow::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.link-arrow:hover::after{transform:scaleX(1)}

/* ---------- Hero ---------- */
.hero{position:relative;padding-top:var(--nav-h);background:var(--bg);overflow:hidden}
.hero-split{display:flex;min-height:calc(100vh - var(--nav-h));align-items:stretch}
.hero-left{flex:0 0 55%;max-width:55%;display:flex;align-items:center;padding:56px 0 72px}
.hero-left .container{padding-right:48px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:7px 16px;margin-bottom:26px;
}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--lime)}
.hero h1{
  font-size:50px;line-height:1.16;letter-spacing:-.025em;
  margin-bottom:22px;max-width:11em;
}
.hero-sub{font-size:18px;line-height:1.8;color:var(--ink-2);max-width:420px;margin-bottom:34px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:46px}
.hero-trust{display:flex;flex-wrap:wrap;gap:28px}
.hero-trust li{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:600;color:var(--ink-2)}
.hero-trust i{
  width:26px;height:26px;border-radius:8px;background:var(--surface);
  border:1px solid var(--line);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:12px;
}
.hero-right{flex:1 1 auto;position:relative;overflow:hidden;border-radius:20px 0 0 20px;background:var(--ink)}
.hero-right img{width:100%;height:100%;object-fit:cover;opacity:.92}
.hero-right::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(23,20,35,.55) 0%,rgba(23,20,35,.12) 45%,rgba(43,31,134,.35) 100%);
}
.hero-line{
  position:absolute;left:0;right:0;bottom:26%;
  height:2px;background:var(--lime);opacity:.9;z-index:2;
}

/* ---------- Values ---------- */
.value-list{border-top:1px solid var(--line)}
.value-row{
  display:flex;align-items:center;gap:48px;
  padding:44px 0;border-bottom:1px solid var(--line);
}
.value-row.is-reverse{flex-direction:row-reverse}
.value-text{flex:1 1 auto;max-width:600px}
.value-text h3{font-size:23px;margin-bottom:10px;display:flex;align-items:center;gap:10px}
.value-text h3::before{content:"";width:8px;height:8px;background:var(--lime);border-radius:2px;flex:0 0 auto}
.value-text p{margin:0;font-size:17px;color:var(--ink-2);max-width:540px}
.value-num{
  flex:0 0 auto;font-size:76px;font-weight:800;line-height:1;
  color:transparent;-webkit-text-stroke:1.5px var(--line);
  font-feature-settings:"tnum";letter-spacing:-.04em;
  transition:color .3s var(--ease),-webkit-text-stroke-color .3s var(--ease);
}
.value-row:hover .value-num{-webkit-text-stroke-color:var(--brand);color:var(--brand-soft)}

/* ---------- Showcase ---------- */
.showcase-wrap{display:flex;align-items:center;gap:56px}
.showcase-media{flex:0 0 60%;max-width:60%;position:relative}
.showcase-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:20px;box-shadow:var(--shadow-lg);
}
.showcase-media::before{
  content:"";position:absolute;left:-18px;top:-18px;width:88px;height:88px;
  border-top:3px solid var(--lime);border-left:3px solid var(--lime);border-radius:6px 0 0 0;
}
.showcase-steps{flex:1 1 auto}
.showcase-steps h2{font-size:32px;margin-bottom:12px}
.showcase-steps>p{margin-bottom:32px;font-size:16px}
.steps{position:relative;padding-left:0}
.steps li{position:relative;display:flex;gap:18px;padding-bottom:28px}
.steps li:last-child{padding-bottom:0}
.steps li::before{
  content:"";position:absolute;left:19px;top:44px;bottom:6px;width:2px;
  background:linear-gradient(180deg,var(--lime) 0%,rgba(201,242,77,.25) 100%);
}
.steps li:last-child::before{display:none}
.step-no{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;
  background:var(--brand-soft);color:var(--brand);
  font-size:14px;font-weight:800;display:flex;align-items:center;justify-content:center;
  font-feature-settings:"tnum";
}
.step-body h3{font-size:18px;margin-bottom:6px}
.step-body p{font-size:15px;margin:0;color:var(--ink-2)}

/* ---------- Proof ---------- */
.proof-stats{display:flex;flex-wrap:wrap;gap:0;border-top:1px solid rgba(255,255,255,.12);border-bottom:1px solid rgba(255,255,255,.12)}
.stat{flex:1 1 200px;padding:36px 28px 36px 0;border-right:1px solid rgba(255,255,255,.12)}
.stat:last-child{border-right:0}
.stat-num{font-size:56px;font-weight:800;color:#fff;line-height:1;letter-spacing:-.03em;font-feature-settings:"tnum"}
.stat-num sup{font-size:22px;color:var(--lime);margin-left:4px;vertical-align:super}
.stat-label{margin-top:12px;font-size:15px;color:rgba(255,255,255,.62)}
.proof-body{display:flex;gap:56px;align-items:flex-start;margin-top:64px}
.proof-cards{flex:1 1 auto;display:flex;gap:24px;align-items:flex-start}
.proof-card{
  flex:1 1 50%;background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.10);border-radius:var(--radius-card);
  padding:26px;backdrop-filter:blur(2px);
}
.proof-card:first-child{transform:translateY(26px)}
.proof-card h3{font-size:18px;margin-bottom:10px}
.proof-card p{font-size:15px;color:rgba(255,255,255,.66);margin:0}
.proof-quote{
  flex:0 0 40%;max-width:40%;
  font-family:"Noto Serif SC","Songti SC",serif;
  font-size:21px;line-height:1.85;color:#fff;
  padding-left:24px;border-left:3px solid var(--lime);
}
.proof-quote cite{
  display:block;margin-top:18px;font-size:14px;font-style:normal;
  color:rgba(255,255,255,.5);font-family:inherit;
}

/* ---------- Plans ---------- */
.plans-wrap{display:flex;gap:56px;align-items:flex-start}
.plans-aside{flex:0 0 32%;max-width:32%;position:sticky;top:104px}
.plans-aside h2{font-size:32px;margin-bottom:16px}
.plans-aside p{font-size:16px;margin-bottom:22px}
.plans-aside .aside-note{
  font-size:14px;color:var(--ink-3);padding-top:20px;border-top:1px solid var(--line);
}
.plans-list{flex:1 1 auto;display:flex;flex-direction:column;gap:18px}
.plan-row{
  display:flex;align-items:center;gap:28px;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:28px 30px;
  transition:all .2s var(--ease);
}
.plan-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#DAD4C9}
.plan-row.is-featured{border:1.5px solid var(--brand);box-shadow:var(--shadow-md)}
.plan-main{flex:0 0 34%;max-width:34%}
.plan-name{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.plan-name h3{font-size:20px;margin:0}
.badge-lime{
  font-size:12px;font-weight:700;color:var(--brand-deep);
  background:var(--lime);border-radius:999px;padding:3px 10px;letter-spacing:.02em;
}
.plan-for{font-size:14px;color:var(--ink-3);margin:0}
.plan-points{flex:1 1 auto;display:flex;flex-direction:column;gap:6px}
.plan-points li{font-size:15px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start}
.plan-points li::before{content:"";flex:0 0 auto;width:6px;height:6px;margin-top:9px;background:var(--accent);border-radius:2px}
.plan-action{flex:0 0 auto}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-head{text-align:center;max-width:640px;margin:0 auto 44px}
.faq-head .sec-tag{margin-left:auto;margin-right:auto}
.faq-head h2{font-size:34px;margin-bottom:12px}
.accordion{border:none;background:transparent;margin:0}
.accordion .accordion-item{border:none;border-top:1px solid var(--line);background:transparent}
.accordion .accordion-item:last-child{border-bottom:1px solid var(--line)}
.accordion .accordion-title{
  border:none;background:transparent;
  padding:24px 52px 24px 0;margin:0;
  color:var(--ink);font-size:17px;font-weight:600;line-height:1.6;
  position:relative;transition:color .2s var(--ease);
}
.accordion .accordion-title:hover{color:var(--brand);background:transparent}
.accordion .accordion-title::before{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  width:30px;height:30px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:400;color:var(--brand);
  background:var(--brand-soft);margin:0;
}
.accordion .accordion-item.is-active>.accordion-title::before{content:"–";background:var(--lime);color:var(--brand-deep)}
.accordion .accordion-content{
  border:none;background:transparent;padding:0 52px 26px 0;
  color:var(--ink-2);font-size:16px;line-height:1.85;
}
.accordion .accordion-content p{margin:0}

/* ---------- News ---------- */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}
.news-head h2{font-size:34px;margin-bottom:8px}
.news-head p{margin:0;font-size:16px}
.news-grid{margin-left:-12px;margin-right:-12px}
.news-grid>.cell{padding-left:12px;padding-right:12px;margin-bottom:24px}
.post-card{
  display:block;height:100%;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);overflow:hidden;color:inherit;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand);color:inherit}
.post-cover{position:relative;aspect-ratio:16/10;background:var(--surface-2);overflow:hidden}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .18s var(--ease)}
.post-card:hover .post-cover img{transform:scale(1.04)}
.post-badge{
  position:absolute;left:14px;top:14px;
  font-size:12px;font-weight:600;color:var(--brand-deep);
  background:rgba(255,255,255,.92);border-radius:999px;padding:4px 12px;
  -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
}
.post-body{padding:22px 22px 20px}
.post-title{
  font-size:18px;line-height:1.5;margin-bottom:10px;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s var(--ease);
}
.post-card:hover .post-title{color:var(--brand)}
.post-summary{
  font-size:15px;line-height:1.75;color:var(--ink-2);margin-bottom:16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);padding-top:14px;border-top:1px solid var(--line);
}
.post-more{font-weight:600;color:var(--brand)}
.news-empty{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  min-height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:10px;color:var(--ink-3);font-size:15px;background:var(--surface);
}
.news-empty i{font-size:22px;color:var(--ink-3)}
.news-empty p{margin:0}

/* ---------- End CTA ---------- */
.end-cta{background:var(--ink);padding:96px 0 104px;position:relative;overflow:hidden}
.end-cta::before{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;
  border-radius:50%;background:radial-gradient(circle,rgba(75,58,203,.35) 0%,rgba(75,58,203,0) 70%);
}
.end-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:48px;flex-wrap:wrap}
.end-inner h2{font-size:34px;color:#fff;margin-bottom:10px;max-width:16em}
.end-inner p{color:rgba(255,255,255,.66);margin:0;max-width:36em}
.end-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- Float CTA ---------- */
.float-cta{
  position:fixed;right:22px;top:50%;transform:translate(120%,-50%);
  display:flex;flex-direction:column;gap:10px;z-index:70;
  transition:transform .34s var(--ease),opacity .34s var(--ease);opacity:0;
}
.float-cta.is-visible{transform:translate(0,-50%);opacity:1}
.float-main{
  writing-mode:vertical-rl;letter-spacing:.22em;
  background:var(--brand);color:#fff;font-size:14px;font-weight:600;
  padding:22px 12px;border-radius:999px;box-shadow:var(--shadow-md);
  transition:background .2s var(--ease),transform .2s var(--ease);
}
.float-main:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px)}
.float-icon{
  width:44px;height:44px;border-radius:50%;
  background:var(--surface);border:1px solid var(--line);color:var(--ink);
  display:flex;align-items:center;justify-content:center;font-size:15px;
  box-shadow:var(--shadow-sm);transition:all .2s var(--ease);
}
.float-icon:hover{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.62);padding:76px 0 0}
.footer-grid{display:flex;flex-wrap:wrap;gap:48px;padding-bottom:56px}
.footer-brand{flex:1 1 340px;max-width:480px}
.footer-brand .brand-name{color:#fff}
.footer-brand p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.58);margin:18px 0 0;max-width:34em}
.footer-col{flex:0 0 auto;min-width:150px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.06em;margin-bottom:18px}
.footer-col ul li{margin-bottom:11px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.62)}
.footer-col a:hover{color:var(--lime)}
.footer-col span{font-size:14px;color:rgba(255,255,255,.62);display:block;line-height:1.7}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0 26px;display:flex;flex-wrap:wrap;gap:12px 24px;
  justify-content:space-between;align-items:center;font-size:13px;color:rgba(255,255,255,.42);
}
.footer-bottom a{color:rgba(255,255,255,.42)}
.footer-bottom a:hover{color:var(--lime)}

/* ---------- Mobile drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,20,35,.5);z-index:90;
  opacity:0;visibility:hidden;transition:.28s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:88%;max-width:360px;
  background:var(--bg);z-index:100;padding:20px 22px 32px;
  transform:translateX(102%);transition:transform .32s var(--ease);
  display:flex;flex-direction:column;box-shadow:var(--shadow-lg);
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
.drawer-brand{font-size:16px;font-weight:800;color:var(--ink)}
.drawer-close{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);font-size:16px;
  display:flex;align-items:center;justify-content:center;
}
.drawer-nav{display:flex;flex-direction:column;flex:1 1 auto}
.drawer-nav a{
  font-size:16px;font-weight:600;color:var(--ink-2);
  padding:15px 4px;border-bottom:1px solid var(--line);
}
.drawer-nav a.is-active{color:var(--brand)}
.drawer-foot{padding-top:24px}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s var(--ease),transform .36s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  :root{--sec-pad:96px}
  .hero h1{font-size:44px}
  .value-num{font-size:64px}
}
@media (max-width:1023px){
  :root{--sec-pad:76px}
  .nav-left{flex:0 0 auto;max-width:none}
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:flex}
  .nav-left-inner{gap:0;padding-left:20px}
  .nav-right{padding-right:20px}
  .hero-split{flex-direction:column;min-height:0}
  .hero-left{flex:1 1 auto;max-width:none;padding:44px 0 36px}
  .hero-left .container{padding-right:24px}
  .hero h1{font-size:36px;max-width:none}
  .hero-right{flex:0 0 auto;height:280px;border-radius:16px;margin:0 20px 44px}
  .showcase-wrap{flex-direction:column;gap:36px}
  .showcase-media{flex:1 1 auto;max-width:100%;width:100%}
  .showcase-media::before{display:none}
  .proof-body{flex-direction:column;gap:36px}
  .proof-cards{width:100%}
  .proof-quote{flex:1 1 auto;max-width:100%}
  .proof-card:first-child{transform:none}
  .plans-wrap{flex-direction:column;gap:32px}
  .plans-aside{flex:1 1 auto;max-width:100%;position:static}
  .plan-row{flex-direction:column;align-items:flex-start;gap:18px}
  .plan-main{flex:1 1 auto;max-width:100%}
  .plan-points{width:100%}
  .end-inner{flex-direction:column;align-items:flex-start}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  :root{--sec-pad:64px}
  .sec-head{margin-bottom:36px}
  .sec-head h2,.plans-aside h2,.news-head h2,.faq-head h2,.end-inner h2{font-size:26px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:16px;max-width:none}
  .hero-cta{margin-bottom:32px}
  .hero-trust{gap:16px}
  .value-row{flex-direction:row;gap:20px;padding:30px 0;align-items:flex-start}
  .value-row.is-reverse{flex-direction:row-reverse}
  .value-num{font-size:44px}
  .value-text h3{font-size:20px}
  .stat{flex:1 1 100%;border-right:0;border-bottom:1px solid rgba(255,255,255,.12);padding:24px 0}
  .stat:last-child{border-bottom:0}
  .stat-num{font-size:44px}
  .proof-cards{flex-direction:column}
  .proof-quote{font-size:18px}
  .plan-row{padding:22px 20px}
  .end-actions{width:100%}
  .end-actions .btn{flex:1 1 auto}
  .footer-grid{gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .float-cta{
    right:0;left:0;bottom:0;top:auto;transform:translateY(120%);
    flex-direction:row;align-items:center;justify-content:center;
    padding:12px 16px;background:rgba(251,250,247,.96);
    border-top:1px solid var(--line);gap:12px;
  }
  .float-cta.is-visible{transform:translateY(0)}
  .float-main{
    writing-mode:horizontal-tb;letter-spacing:0;flex:1 1 auto;
    text-align:center;padding:14px 22px;border-radius:var(--radius-btn);
  }
  .float-icon{flex:0 0 auto}
  body{padding-bottom:74px}
}
@media (max-width:519px){
  .hero h1{font-size:28px}
  .hero-right{height:220px;margin:0 16px 36px}
  .btn{padding:13px 22px;font-size:14px}
  .value-row{gap:14px}
  .value-num{font-size:36px}
}
@media (min-width:1600px){
  :root{--container:1360px;--sec-pad:128px}
  .hero h1{font-size:56px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .btn:hover,.post-card:hover,.plan-row:hover,.float-main:hover{transform:none}
}

/* roulang page: article */
:root{
  --brand:#4B3ACB;
  --brand-deep:#2B1F86;
  --brand-soft:#ECE9FB;
  --accent:#14A08A;
  --lime:#C9F24D;
  --ink:#171423;
  --ink-2:#4A4553;
  --ink-3:#8A8494;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F2EFEA;
  --line:#E6E2DB;
  --danger:#B4453C;
  --radius-card:16px;
  --radius-btn:8px;
  --radius-img:12px;
  --radius-input:10px;
  --shadow:0 1px 2px rgba(23,20,35,.06), 0 12px 32px -12px rgba(23,20,35,.12);
  --shadow-hover:0 2px 4px rgba(23,20,35,.08), 0 20px 44px -16px rgba(23,20,35,.18);
  --container:1200px;
  --nav-h:68px;
  --font-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","SimSun",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s ease}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.muted{color:var(--ink-3)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(251,250,247,0);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.9);
  backdrop-filter:blur(8px);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(23,20,35,.04);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:var(--nav-h);
}
.header-content-side{display:flex;align-items:center;gap:28px;min-width:0}
.header-visual-side{display:flex;align-items:center;gap:14px;justify-content:flex-end}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  color:#fff;font-weight:800;font-size:15px;letter-spacing:.02em;
  display:flex;align-items:center;justify-content:center;text-transform:lowercase;
}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px}
.main-nav a{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .22s cubic-bezier(.2,.7,.2,1);
}
.main-nav a:hover{color:var(--brand)}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--brand);font-weight:700}
.main-nav a.is-active::after{transform:scaleX(1)}
.nav-search{
  display:flex;align-items:center;gap:8px;
  border:1px solid var(--line);border-radius:999px;
  background:var(--surface);padding:0 14px;height:40px;width:230px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.nav-search i{color:var(--ink-3);font-size:13px}
.nav-search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink)}
.nav-search input::placeholder{color:var(--ink-3)}
.nav-search:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(75,58,203,.12)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;border-radius:var(--radius-btn);
  font-weight:600;font-size:15px;line-height:1;padding:14px 28px;
  transition:background .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--shadow-hover);color:#fff}
.btn-primary:active{transform:translateY(0);box-shadow:none}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--lime);color:var(--ink);transform:translateY(-2px)}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-lg{padding:16px 34px;font-size:16px}
.btn-block{width:100%}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);
  border-radius:10px;background:var(--surface);cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}
.drawer-mask{
  position:fixed;inset:0;background:rgba(23,20,35,.42);z-index:70;
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(86vw,360px);
  background:var(--surface);z-index:80;padding:22px;
  transform:translateX(102%);transition:transform .3s cubic-bezier(.2,.7,.2,1);
  overflow-y:auto;box-shadow:-16px 0 48px -24px rgba(23,20,35,.4);
  display:flex;flex-direction:column;gap:18px;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{
  width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface-2);cursor:pointer;color:var(--ink);font-size:18px;
}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer-nav a{
  padding:15px 4px;border-bottom:1px solid var(--line);
  font-size:16px;font-weight:500;color:var(--ink-2);
}
.drawer-nav a:hover{color:var(--brand)}

/* ---------- 文章头部 ---------- */
.article-head{background:var(--surface-2);padding:28px 0 0;border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3)}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--ink-3);opacity:.7}
.breadcrumb .current{color:var(--ink);font-weight:600;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;background:var(--surface-2);
  border:1px solid var(--line);font-size:13px;font-weight:500;color:var(--ink-2);
  transition:background .2s ease,color .2s ease,border-color .2s ease;
}
.chip:hover{background:var(--brand-soft);color:var(--brand);border-color:var(--brand-soft)}
.chip-cat{margin:20px 0 14px;background:var(--surface);color:var(--brand);border-color:rgba(75,58,203,.24);font-weight:600}
.article-head h1{
  font-size:clamp(28px,4vw,48px);
  line-height:1.22;
  letter-spacing:-.02em;
  font-weight:800;
  color:var(--ink);
  max-width:22ch;
  margin:0 0 18px;
}
.meta-row{
  display:flex;flex-wrap:wrap;gap:10px 24px;
  font-size:14px;color:var(--ink-3);
  padding-bottom:26px;
}
.meta-row span{display:inline-flex;align-items:center;gap:7px}
.meta-row i{color:var(--accent);font-size:13px}
.article-cover{margin:0 0 -34px;position:relative;z-index:2}
.article-cover img{
  width:100%;aspect-ratio:1200/460;object-fit:cover;
  border-radius:20px;box-shadow:var(--shadow);
  background-color:var(--surface-2);
}

/* ---------- 正文区 ---------- */
.article-main{padding:76px 0 40px}
.article-body{
  max-width:760px;margin:0 auto;
  font-size:17.5px;line-height:1.92;color:var(--ink-2);
  overflow-wrap:break-word;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.2em}
.article-body h2{
  position:relative;padding-left:16px;margin:2.1em 0 .8em;
  font-size:clamp(24px,2.6vw,32px);line-height:1.3;
  font-weight:800;letter-spacing:-.02em;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.42em;width:4px;height:.95em;
  border-radius:2px;background:var(--brand);
}
.article-body h3{margin:1.8em 0 .6em;font-size:22px;line-height:1.4;font-weight:700;color:var(--ink);letter-spacing:-.01em}
.article-body h4{margin:1.5em 0 .5em;font-size:18px;font-weight:700;color:var(--ink)}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--brand-deep)}
.article-body ul,.article-body ol{margin:0 0 1.2em}
.article-body ul li{position:relative;padding-left:22px;margin-bottom:.55em}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;
  border-radius:2px;background:var(--lime);
}
.article-body ol{counter-reset:li}
.article-body ol li{position:relative;padding-left:26px;margin-bottom:.55em;counter-increment:li}
.article-body ol li::before{
  content:counter(li);position:absolute;left:0;top:.05em;
  color:var(--brand);font-weight:700;font-variant-numeric:tabular-nums;
}
.article-body blockquote{
  margin:1.6em 0;padding:20px 24px;
  background:var(--surface-2);border-left:4px solid var(--accent);
  border-radius:0 12px 12px 0;color:var(--ink-2);font-family:var(--font-serif);
}
.article-body img{border-radius:var(--radius-img);margin:1.6em 0 .6em}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:-.2em}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}
.article-body table{
  display:block;width:100%;max-width:100%;overflow-x:auto;
  border-collapse:collapse;font-size:15px;margin:1.6em 0;
  border:1px solid var(--line);border-radius:12px;
}
.article-body th,.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
.article-body th{background:var(--surface-2);color:var(--ink);font-weight:700}
.article-body code{
  background:var(--surface-2);border-radius:6px;padding:2px 6px;
  font-size:15px;color:var(--brand-deep);
}
.article-empty{
  border:1px dashed var(--line);border-radius:var(--radius-card);
  background:var(--surface);padding:44px 24px;text-align:center;
}
.article-empty i{font-size:30px;color:var(--ink-3)}
.article-empty p{margin:14px 0 8px;font-size:19px;font-weight:700;color:var(--ink)}
.article-empty p.muted{font-size:15px;font-weight:400;margin-bottom:22px}

/* ---------- 侧栏 ---------- */
.side-panel{
  position:sticky;top:calc(var(--nav-h) + 26px);
  display:flex;flex-direction:column;gap:16px;
}
.side-card{
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius-card);padding:20px;box-shadow:var(--shadow);
}
.side-card h3{
  font-size:14px;font-weight:700;color:var(--ink);
  letter-spacing:.02em;margin-bottom:14px;
  display:flex;align-items:center;gap:8px;
}
.side-card h3 i{color:var(--brand);font-size:13px}
.side-list{display:flex;flex-direction:column}
.side-list li{
  display:flex;justify-content:space-between;gap:12px;
  font-size:14px;color:var(--ink-2);
  padding:9px 0;border-bottom:1px dashed var(--line);
}
.side-list li:last-child{border-bottom:0;padding-bottom:0}
.side-list li span:first-child{color:var(--ink-3)}
.side-list li span:last-child{font-weight:600;color:var(--ink);text-align:right}
.side-links{display:flex;flex-direction:column;gap:2px}
.side-links a{
  display:flex;align-items:center;justify-content:space-between;
  font-size:14.5px;color:var(--ink-2);padding:10px 0;
  border-bottom:1px solid var(--line);
}
.side-links a:last-child{border-bottom:0}
.side-links a:hover{color:var(--brand)}
.side-links a i{font-size:11px;color:var(--ink-3);transition:transform .2s ease}
.side-links a:hover i{transform:translateX(3px);color:var(--brand)}
.side-cta{background:var(--ink);border-color:var(--ink);color:#fff}
.side-cta h3{color:#fff}
.side-cta h3 i{color:var(--lime)}
.side-cta p{font-size:14px;color:rgba(255,255,255,.72);margin-bottom:16px;line-height:1.7}

/* ---------- 标签区 ---------- */
.tag-block{
  max-width:760px;margin:44px auto 0;padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
}
.tag-label{font-size:14px;font-weight:700;color:var(--ink);margin-right:4px}

/* ---------- 推荐 / 卡片 ---------- */
.section{padding:72px 0}
.section-alt{background:var(--surface-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.8vw,34px);font-weight:800;letter-spacing:-.02em;color:var(--ink);line-height:1.25}
.section-head p{margin-top:8px;font-size:15px;color:var(--ink-3)}
.text-link{
  position:relative;font-size:15px;font-weight:600;color:var(--brand);white-space:nowrap;padding-bottom:3px;
}
.text-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .22s cubic-bezier(.2,.7,.2,1);
}
.text-link:hover::after{transform:scaleX(1)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow);height:100%;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(75,58,203,.35)}
.post-cover{position:relative;aspect-ratio:16/10;background:var(--surface-2);overflow:hidden}
.post-cover img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease}
.post-card:hover .post-cover img{transform:scale(1.04)}
.post-badge{
  position:absolute;left:12px;top:12px;padding:5px 12px;border-radius:999px;
  background:rgba(255,255,255,.94);color:var(--brand);
  font-size:12px;font-weight:700;border:1px solid rgba(75,58,203,.18);
}
.post-body{padding:20px 20px 18px;display:flex;flex-direction:column;flex:1}
.post-title{
  font-size:18px;font-weight:700;line-height:1.5;color:var(--ink);letter-spacing:-.01em;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease;
}
.post-card:hover .post-title{color:var(--brand)}
.post-excerpt{
  margin-top:10px;font-size:14.5px;line-height:1.75;color:var(--ink-3);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-foot{
  margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--ink-3);
}
.post-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand)}
.post-more i{font-size:11px;transition:transform .18s ease}
.post-card:hover .post-more i{transform:translateX(4px)}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink);color:#fff;padding:84px 0}
.cta-inner{max-width:720px}
.cta-band h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.28;color:#fff}
.cta-band p{margin:18px 0 30px;font-size:16px;line-height:1.85;color:rgba(255,255,255,.72);max-width:56ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-line{width:56px;height:3px;background:var(--lime);border-radius:2px;margin-bottom:26px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1.2fr 1.2fr;gap:40px;
  padding-bottom:52px;
}
.footer-brand .brand-name{color:#fff}
.footer-brand p{margin-top:18px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:42ch}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.66);line-height:1.7}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  padding:22px 0;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 返回顶部 ---------- */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:55;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);cursor:pointer;
  box-shadow:var(--shadow);opacity:0;visibility:hidden;
  transition:opacity .25s ease,visibility .25s ease,background .2s ease,color .2s ease,transform .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand);color:#fff;border-color:var(--brand);transform:translateY(-3px)}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.2,.7,.2,1),transform .36s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  :root{--container:1280px}
  .section{padding:96px 0}
  .article-main{padding:88px 0 48px}
}
@media (min-width:1600px){
  :root{--container:1360px}
  body{font-size:17.5px}
}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-search{display:none}
  .nav-toggle{display:flex}
  .article-main{padding:56px 0 32px}
  .side-panel{position:static;margin-top:44px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .header-inner{min-height:56px}
  :root{--nav-h:56px}
  .brand-mark{width:30px;height:30px;font-size:13px}
  .brand-name{font-size:16px}
  .btn-sm{padding:10px 16px;font-size:13px}
  .article-head{padding:20px 0 0}
  .article-head h1{max-width:none}
  .article-cover{margin-bottom:-20px}
  .article-cover img{aspect-ratio:16/10;border-radius:16px}
  .article-body{font-size:17px;line-height:1.9}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px}
  .card-grid{grid-template-columns:1fr}
  .cta-band{padding:60px 0}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .site-footer{padding-top:52px}
  .to-top{right:14px;bottom:14px;width:42px;height:42px}
}
@media (max-width:520px){
  .meta-row{gap:8px 16px;font-size:13px}
  .breadcrumb .current{white-space:normal}
  .tag-block{margin-top:32px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --brand:#4B3ACB;
  --brand-deep:#2B1F86;
  --brand-soft:#ECE9FB;
  --accent:#14A08A;
  --lime:#C9F24D;
  --ink:#171423;
  --ink-2:#4A4553;
  --ink-3:#8A8494;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F2EFEA;
  --line:#E6E2DB;
  --r-card:16px;
  --r-btn:8px;
  --r-img:16px;
  --r-input:10px;
  --shadow-sm:0 1px 2px rgba(23,20,35,.06);
  --shadow-md:0 1px 2px rgba(23,20,35,.06),0 12px 32px -12px rgba(23,20,35,.12);
  --shadow-lg:0 1px 2px rgba(23,20,35,.07),0 20px 44px -16px rgba(23,20,35,.18);
  --nav-h:68px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.02em;font-weight:800}
p{margin:0}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}

.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
@media (min-width:1280px){.container{padding:0 32px}}

/* ---------- 栅格微调（覆盖 Foundation 默认间距，统一 24/32 gutter） ---------- */
.grid-x{margin-left:-12px;margin-right:-12px}
.grid-x>.cell{padding-left:12px;padding-right:12px}
@media (min-width:1024px){
  .grid-x{margin-left:-16px;margin-right:-16px}
  .grid-x>.cell{padding-left:16px;padding-right:16px}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);border:0;
  font-size:16px;font-weight:600;line-height:1.2;letter-spacing:.01em;
  cursor:pointer;transition:background-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;
}
.btn--primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn--primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn--primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
.btn--ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn--ghost:active{transform:translateY(0)}
.btn--sm{padding:10px 20px;font-size:15px}
.btn--onink{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.45)}
.btn--onink:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.btn--lime{background:var(--lime);color:var(--ink)}
.btn--lime:hover{background:#d9fb70;transform:translateY(-2px);box-shadow:0 12px 28px -14px rgba(201,242,77,.8)}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand);
  position:relative;padding-bottom:3px;
}
.btn-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--lime);
  transition:width .22s var(--ease);
}
.btn-link:hover::after{width:100%}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(251,250,247,.88);
  border-bottom:1px solid transparent;
  transition:background-color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 8px 24px -20px rgba(23,20,35,.4);
  backdrop-filter:blur(8px);
  background:rgba(251,250,247,.94);
}
.header-inner{
  display:flex;align-items:center;gap:20px;height:var(--nav-h);
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;letter-spacing:-.02em;
  box-shadow:var(--shadow-sm);position:relative;
}
.brand-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;width:9px;height:9px;border-radius:50%;
  background:var(--lime);border:2px solid var(--bg);
}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px}
.main-nav a{
  position:relative;padding:9px 13px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .18s var(--ease),background-color .18s var(--ease);
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand);background:var(--brand-soft)}
.main-nav a.is-active{color:var(--brand);font-weight:700;background:var(--brand-soft)}
.main-nav a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:4px;height:2px;background:var(--lime);border-radius:2px;
}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  padding:0 14px;height:42px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.search-box i{color:var(--ink-3);font-size:13px}
.search-box input{
  border:0;background:transparent;outline:none;width:132px;font-size:14px;color:var(--ink);height:100%;
}
.search-box input::placeholder{color:var(--ink-3)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(201,242,77,.35)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);cursor:pointer;
  align-items:center;justify-content:center;font-size:17px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
  font-size:14px;color:var(--ink-3);padding:20px 0 0;
}
.breadcrumb a{color:var(--ink-2);transition:color .18s var(--ease)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .current{color:var(--brand);font-weight:600}

/* ---------- Hero 分屏 ---------- */
.hero{padding:18px 0 88px;position:relative;overflow:hidden}
.hero-grid{align-items:center}
.hero-copy{padding-right:8px}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  padding:7px 16px;font-size:13.5px;font-weight:600;color:var(--brand);
  box-shadow:var(--shadow-sm);margin-bottom:22px;
}
.hero-badge .pulse{
  width:8px;height:8px;border-radius:50%;background:var(--lime);
  box-shadow:0 0 0 4px rgba(201,242,77,.28);
}
.hero-title{
  font-size:clamp(34px,4.4vw,50px);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero-title .hl{
  color:var(--brand);
  position:relative;
  white-space:nowrap;
}
.hero-title .hl::after{
  content:"";position:absolute;left:0;right:0;bottom:4px;height:8px;
  background:var(--lime);opacity:.42;border-radius:4px;z-index:-1;
}
.hero-sub{
  font-size:18px;line-height:1.85;color:var(--ink-2);max-width:560px;margin-bottom:32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:36px}
.hero-trust{display:flex;flex-wrap:wrap;gap:12px 28px;padding-top:26px;border-top:1px solid var(--line)}
.trust-item{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:600;color:var(--ink-2)}
.trust-item i{color:var(--accent);font-size:14px}
.hero-visual{position:relative}
.hero-visual .frame{
  position:relative;border-radius:20px;overflow:hidden;background:var(--surface-2);
  aspect-ratio:4/3.35;box-shadow:var(--shadow-lg);
}
.hero-visual .frame img{width:100%;height:100%;object-fit:cover}
.hero-visual .frame::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
}
.hero-visual .tag-card{
  position:absolute;left:-18px;bottom:26px;
  background:var(--surface);border:1px solid var(--line);border-radius:14px;
  padding:14px 18px;box-shadow:var(--shadow-md);max-width:230px;
}
.hero-visual .tag-card strong{display:block;font-size:14px;color:var(--ink);margin-bottom:2px}
.hero-visual .tag-card span{font-size:13px;color:var(--ink-3);line-height:1.6}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section--surface{background:var(--surface)}
.section--sand{background:var(--surface-2)}
.section--tight{padding:72px 0}
.section-head{max-width:720px;margin-bottom:52px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--accent);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--lime);border-radius:2px}
.h2{font-size:clamp(26px,3vw,34px);font-weight:800;margin-bottom:16px}
.lead{font-size:17px;line-height:1.9;color:var(--ink-2);max-width:760px}

/* ---------- 编号要点 ---------- */
.points{border-top:1px solid var(--line)}
.point-row{
  display:grid;grid-template-columns:110px 1fr;gap:28px;
  padding:34px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease),padding-left .2s var(--ease);
}
.point-row:hover{background:linear-gradient(90deg,rgba(236,233,251,.5),rgba(236,233,251,0));padding-left:8px}
.point-no{
  font-size:34px;font-weight:900;line-height:1;
  color:var(--brand);opacity:.32;letter-spacing:-.03em;
  font-variant-numeric:tabular-nums;padding-top:6px;position:relative;
}
.point-no::after{
  content:"";position:absolute;left:0;bottom:-12px;width:26px;height:3px;border-radius:3px;background:var(--lime);
}
.point-body h3{font-size:23px;font-weight:800;margin-bottom:10px}
.point-body p{font-size:16.5px;color:var(--ink-2);line-height:1.9;max-width:820px}

/* ---------- 深色面板 ---------- */
.band--ink{background:var(--ink);color:#fff;padding:96px 0;position:relative;overflow:hidden}
.band--ink::before{
  content:"";position:absolute;right:-120px;top:-120px;width:380px;height:380px;border-radius:50%;
  background:radial-gradient(circle,rgba(75,58,203,.55),rgba(75,58,203,0) 68%);
}
.band--ink .h2{color:#fff}
.band--ink .lead{color:rgba(255,255,255,.72)}
.status-list{display:grid;gap:2px;background:rgba(255,255,255,.1);border-radius:16px;overflow:hidden}
.status-list li{
  display:flex;gap:16px;align-items:flex-start;
  background:rgba(255,255,255,.04);
  padding:22px 24px;transition:background-color .2s var(--ease);
}
.status-list li:hover{background:rgba(255,255,255,.09)}
.status-list .dot{
  flex:0 0 auto;width:10px;height:10px;border-radius:50%;background:var(--lime);margin-top:10px;
  box-shadow:0 0 0 4px rgba(201,242,77,.18);
}
.status-list strong{display:block;font-size:16px;font-weight:700;color:#fff;margin-bottom:4px}
.status-list span{font-size:15px;line-height:1.8;color:rgba(255,255,255,.7)}
.status-meta{
  display:flex;flex-wrap:wrap;gap:12px 28px;margin-top:26px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);font-size:14px;color:rgba(255,255,255,.6);
}
.status-meta span{display:inline-flex;align-items:center;gap:8px}
.status-meta i{color:var(--lime);font-size:13px}

/* ---------- 精选条目卡片 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.icard{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.icard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--brand)}
.icard-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.icard-media img{width:100%;height:100%;object-fit:cover;transition:transform .18s var(--ease)}
.icard:hover .icard-media img{transform:scale(1.04)}
.icard-badge{
  position:absolute;left:14px;top:14px;
  background:rgba(23,20,35,.78);color:#fff;font-size:12.5px;font-weight:600;
  padding:5px 12px;border-radius:999px;backdrop-filter:blur(6px);
  border:1px solid rgba(201,242,77,.5);
}
.icard-body{padding:22px 24px 24px}
.icard-title{
  font-size:19px;font-weight:800;line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s var(--ease);
}
.icard:hover .icard-title{color:var(--brand)}
.icard-excerpt{
  font-size:15px;line-height:1.8;color:var(--ink-2);margin-bottom:18px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.icard-meta{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:16px;border-top:1px solid var(--line);
  font-size:13.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;
}
.icard-more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand)}
.icard-more i{font-size:12px;transition:transform .18s var(--ease)}
.icard:hover .icard-more i{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto}
.accordion.faq-accordion{
  background:transparent;border:0;border-top:1px solid var(--line);
}
.faq-accordion .accordion-item{border-bottom:1px solid var(--line);background:transparent}
.faq-accordion .accordion-title{
  border:0;background:transparent;color:var(--ink);
  padding:24px 52px 24px 0;font-size:17px;font-weight:600;line-height:1.6;
  position:relative;transition:color .18s var(--ease);
}
.faq-accordion .accordion-title:hover{color:var(--brand);background:transparent}
.faq-accordion .accordion-title::before{
  content:"+";position:absolute;right:4px;left:auto;top:50%;transform:translateY(-50%);
  width:32px;height:32px;line-height:29px;text-align:center;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);color:var(--brand);
  font-size:18px;font-weight:600;
}
.faq-accordion .accordion-title::after{content:none}
.faq-accordion .accordion-item.is-active .accordion-title{color:var(--brand)}
.faq-accordion .accordion-item.is-active .accordion-title::before{
  content:"–";border-color:var(--brand);background:var(--brand-soft);
}
.faq-accordion .accordion-content{
  border:0;background:transparent;color:var(--ink-2);
  padding:0 40px 26px 0;font-size:16px;line-height:1.9;
}
.faq-accordion .accordion-content p{margin:0}

/* ---------- 结尾 CTA ---------- */
.cta-band{background:var(--ink);color:#fff;padding:88px 0}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px;
  border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:44px 48px;
  background:linear-gradient(120deg,rgba(75,58,203,.24),rgba(23,20,35,0) 62%);
}
.cta-copy h2{font-size:clamp(24px,2.8vw,32px);font-weight:800;color:#fff;margin-bottom:12px}
.cta-copy p{font-size:16px;color:rgba(255,255,255,.72);max-width:560px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-note{
  width:100%;margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13.5px;color:rgba(255,255,255,.55);
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:52px;
}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-mark{background:var(--brand)}
.footer-brand p{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.6);margin-top:18px;max-width:420px}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px;letter-spacing:.01em}
.footer-col ul{display:grid;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.62);line-height:1.7;transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.08);padding:24px 0 32px;
  font-size:13.5px;color:rgba(255,255,255,.5);
}

/* ---------- 滚动进入动效 ---------- */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s var(--ease),transform .36s var(--ease)}
.reveal.is-visible{opacity:1;transform:translateY(0)}
.reveal[data-d="1"]{transition-delay:.06s}
.reveal[data-d="2"]{transition-delay:.12s}
.reveal[data-d="3"]{transition-delay:.18s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn:hover,.icard:hover{transform:none}
  .icard:hover .icard-media img{transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){
  .nav-toggle{display:inline-flex}
  .main-nav{
    display:none;position:absolute;left:0;right:0;top:var(--nav-h);
    flex-direction:column;align-items:stretch;gap:4px;margin:0;
    background:var(--surface);border-bottom:1px solid var(--line);
    padding:16px 24px 22px;box-shadow:var(--shadow-md);
  }
  .site-header.nav-open .main-nav{display:flex}
  .main-nav a{padding:13px 14px;font-size:16px}
  .main-nav a.is-active::after{left:14px;right:auto;width:22px}
  .search-box{display:none}
  .hero{padding:10px 0 64px}
  .hero-grid{flex-direction:column}
  .hero-copy{padding-right:0}
  .hero-visual{margin-top:36px}
  .hero-visual .tag-card{left:14px;bottom:14px}
  .section{padding:72px 0}
  .band--ink{padding:72px 0}
  .point-row{grid-template-columns:76px 1fr;gap:20px;padding:28px 0}
  .point-no{font-size:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16.5px}
  .container{padding:0 20px}
  .header-inner{gap:12px}
  .brand-name{font-size:16px}
  .header-tools .btn{display:none}
  .hero{padding:6px 0 56px}
  .hero-title{font-size:clamp(30px,8.4vw,38px)}
  .hero-title .hl{white-space:normal}
  .hero-sub{font-size:16.5px}
  .hero-actions{gap:12px}
  .btn{padding:13px 22px;font-size:15.5px}
  .hero-trust{gap:10px 20px}
  .hero-visual .frame{aspect-ratio:16/10;border-radius:16px}
  .hero-visual .tag-card{position:static;margin-top:16px;max-width:none;box-shadow:var(--shadow-sm)}
  .section{padding:56px 0}
  .section--tight{padding:48px 0}
  .section-head{margin-bottom:36px}
  .band--ink{padding:56px 0}
  .point-row{grid-template-columns:1fr;gap:12px;padding:24px 0}
  .point-no{padding-top:0}
  .point-no::after{bottom:-6px}
  .point-body h3{font-size:20px}
  .card-grid{grid-template-columns:1fr;gap:22px}
  .faq-accordion .accordion-title{padding:20px 46px 20px 0;font-size:16.5px}
  .faq-accordion .accordion-content{padding:0 24px 22px 0}
  .cta-band{padding:56px 0}
  .cta-inner{padding:28px 22px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:36px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:400px){
  .hero-title{font-size:28px}
  .btn{width:100%}
  .hero-actions{flex-direction:column;align-items:stretch}
}
@media (min-width:1600px){
  .container{max-width:1360px}
  .hero-sub{font-size:19px}
  .h2{font-size:36px}
}

/* roulang page: category3 */
:root{
  --brand:#4B3ACB;
  --brand-deep:#2B1F86;
  --brand-soft:#ECE9FB;
  --accent:#14A08A;
  --lime:#C9F24D;
  --ink:#171423;
  --ink-2:#4A4553;
  --ink-3:#8A8494;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F2EFEA;
  --line:#E6E2DB;
  --radius-card:16px;
  --radius-btn:8px;
  --radius-img:16px;
  --radius-input:10px;
  --shadow-soft:0 1px 2px rgba(23,20,35,.06), 0 12px 32px -12px rgba(23,20,35,.12);
  --shadow-hover:0 2px 4px rgba(23,20,35,.08), 0 18px 40px -14px rgba(23,20,35,.18);
  --nav-h:68px;
  --container:1200px;
  --fs-display:60px;
  --fs-h1:46px;
  --fs-h2:34px;
  --fs-h3:23px;
  --fs-h4:18px;
  --fs-body:17px;
  --fs-sm:14px;
  --fs-xs:13px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:var(--fs-body);
  line-height:1.9;
  font-weight:400;
  overflow-x:hidden;
}

img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none;background-color:transparent;transition:color .22s var(--ease),background-color .22s var(--ease),border-color .22s var(--ease)}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1.2em}
h1,h2,h3,h4{margin:0;font-weight:800;color:var(--ink);line-height:1.22;letter-spacing:-.02em}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
h4{font-size:var(--fs-h4);font-weight:700}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}

[id]{scroll-margin-top:88px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--radius-btn);
  font-size:16px;
  font-weight:600;
  line-height:1;
  border:1.5px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:transform .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-soft)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-ghost-light{color:#fff;border-color:rgba(255,255,255,.6)}
.btn-ghost-light:hover{background:#fff;color:var(--ink);border-color:#fff}
.btn-sm{padding:10px 20px;font-size:15px}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:var(--fs-sm);
  font-weight:600;
  color:var(--ink);
  position:relative;
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-4px;
  height:2px;
  width:0;
  background:var(--lime);
  transition:width .22s var(--ease);
}
.link-arrow:hover{color:var(--brand)}
.link-arrow:hover::after{width:100%}

/* ============ 导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  height:var(--nav-h);
  display:flex;
  align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.92);
  -webkit-backdrop-filter:blur(6px);
  backdrop-filter:blur(6px);
  border-bottom-color:var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  width:100%;
}
.header-left{display:flex;align-items:center;gap:40px;min-width:0}
.header-right{display:flex;align-items:center;gap:12px}

.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand);
  color:#fff;
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  box-shadow:0 0 0 3px rgba(201,242,77,.28);
}
.brand-name{
  font-size:19px;
  font-weight:800;
  letter-spacing:-.01em;
  color:#fff;
  transition:color .28s var(--ease);
}
.site-header.is-scrolled .brand-name{color:var(--ink)}
.site-header.is-scrolled .brand-mark{box-shadow:0 0 0 3px rgba(75,58,203,.14)}

.main-nav{display:flex;align-items:center;gap:28px}
.main-nav a{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.82);
  padding:6px 0;
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:2px;width:0;
  background:var(--lime);
  transition:width .22s var(--ease);
}
.main-nav a:hover{color:#fff}
.main-nav a:hover::after{width:100%}
.main-nav a.is-active{color:#fff;font-weight:700}
.main-nav a.is-active::after{width:100%}
.site-header.is-scrolled .main-nav a{color:var(--ink-2)}
.site-header.is-scrolled .main-nav a:hover{color:var(--brand)}
.site-header.is-scrolled .main-nav a.is-active{color:var(--brand)}

.nav-search{
  width:40px;height:40px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1.5px solid rgba(255,255,255,.42);
  background:transparent;
  color:#fff;
  cursor:pointer;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.nav-search:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.site-header.is-scrolled .nav-search{border-color:var(--line);color:var(--ink)}
.site-header.is-scrolled .nav-search:hover{background:var(--ink);border-color:var(--ink);color:#fff}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  align-items:center;
  justify-content:center;
  border:1.5px solid rgba(255,255,255,.42);
  border-radius:10px;
  background:transparent;
  cursor:pointer;
}
.nav-toggle span{
  position:relative;
  width:18px;height:2px;
  background:#fff;
  display:block;
  transition:background-color .2s var(--ease);
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:18px;height:2px;background:#fff;
  transition:transform .24s var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.site-header.is-scrolled .nav-toggle{border-color:var(--line)}
.site-header.is-scrolled .nav-toggle span,
.site-header.is-scrolled .nav-toggle span::before,
.site-header.is-scrolled .nav-toggle span::after{background:var(--ink)}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

/* ============ Hero ============ */
.hero{
  position:relative;
  margin-top:calc(var(--nav-h) * -1);
  min-height:660px;
  display:flex;
  align-items:flex-end;
  padding:calc(var(--nav-h) + 40px) 0 84px;
  overflow:hidden;
  color:#fff;
}
.hero-bg{position:absolute;inset:0;z-index:0;background:var(--ink)}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero::after{
  content:"";
  position:absolute;inset:0;z-index:1;
  background:linear-gradient(180deg,rgba(23,20,35,.86) 0%,rgba(23,20,35,.56) 44%,rgba(23,20,35,.92) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:860px}
.hero-inner::before{
  content:"";
  position:absolute;
  left:-24px;top:-40px;
  width:3px;height:180px;
  background:var(--lime);
  opacity:.9;
}
.breadcrumb{margin-bottom:26px}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:var(--fs-sm)}
.breadcrumb li{color:rgba(255,255,255,.7)}
.breadcrumb li+li::before{content:"/";margin-right:10px;color:rgba(255,255,255,.35)}
.breadcrumb a{color:rgba(255,255,255,.82)}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb [aria-current="page"]{color:#fff;font-weight:600}

.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 16px;
  border-radius:999px;
  border:1px solid rgba(201,242,77,.55);
  background:rgba(201,242,77,.1);
  color:#EAFBBF;
  font-size:var(--fs-xs);
  font-weight:600;
  letter-spacing:.04em;
  margin-bottom:24px;
}
.hero h1{
  color:#fff;
  font-size:var(--fs-h1);
  font-weight:900;
  line-height:1.18;
  margin-bottom:20px;
}
.hero-sub{
  font-size:18px;
  line-height:1.8;
  color:rgba(255,255,255,.82);
  max-width:620px;
  margin-bottom:34px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}
.hero-facts{display:flex;flex-wrap:wrap;gap:28px}
.hero-facts li{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:var(--fs-sm);
  color:rgba(255,255,255,.78);
}
.hero-facts i{color:var(--lime)}

/* ============ 通用板块 ============ */
.section{padding:100px 0;position:relative}
.section--sand{background:var(--surface-2)}
.section--ink{background:var(--ink);color:#fff}
.section-head{max-width:720px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:var(--fs-xs);
  font-weight:700;
  letter-spacing:.14em;
  color:var(--brand);
  text-transform:uppercase;
  margin-bottom:16px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;
  background:var(--lime);
  display:inline-block;
}
.section-head h2{margin-bottom:18px}
.section-head p{color:var(--ink-2);font-size:17px;margin:0}
.section--ink .section-head h2{color:#fff}
.section--ink .section-head p{color:rgba(255,255,255,.72)}
.section--ink .eyebrow{color:var(--lime)}

/* ============ 更新要点编号纵列 ============ */
.point-list{border-top:1px solid var(--line)}
.point-item{
  display:grid;
  grid-template-columns:96px 1fr;
  gap:32px;
  padding:36px 0;
  border-bottom:1px solid var(--line);
  transition:background-color .22s var(--ease);
}
.point-item:hover{background:rgba(236,233,251,.4)}
.point-num{
  font-size:15px;
  font-weight:800;
  color:var(--brand);
  font-variant-numeric:tabular-nums;
  letter-spacing:.1em;
  padding-top:4px;
}
.point-item h3{margin-bottom:10px;font-size:var(--fs-h3)}
.point-item p{margin:0;color:var(--ink-2);font-size:16.5px;max-width:760px}

/* ============ 精选条目卡片 ============ */
.waterfall{margin-left:-0.9375rem;margin-right:-0.9375rem}
.waterfall .waterfall-col{margin-bottom:32px;padding-left:.9375rem;padding-right:.9375rem}
@media (min-width:1024px){
  .waterfall .waterfall-col:nth-child(2){margin-top:52px}
  .waterfall .waterfall-col:nth-child(3){margin-top:104px}
}
.post-card{
  display:flex;
  flex-direction:column;
  height:100%;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-soft);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--brand)}
.post-media{position:relative;aspect-ratio:16/10;background:var(--surface-2);overflow:hidden}
.post-media img{width:100%;height:100%;object-fit:cover;transition:transform .18s var(--ease)}
.post-card:hover .post-media img{transform:scale(1.04)}
.badge{
  position:absolute;
  left:14px;top:14px;
  display:inline-flex;
  align-items:center;
  padding:5px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.94);
  color:var(--brand);
  font-size:12px;
  font-weight:700;
  letter-spacing:.04em;
  border:1px solid rgba(201,242,77,.9);
}
.post-body{padding:24px 24px 22px;display:flex;flex-direction:column;flex:1}
.post-body h3{
  font-size:20px;
  line-height:1.45;
  margin-bottom:12px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  transition:color .18s var(--ease);
}
.post-card:hover .post-body h3{color:var(--brand)}
.post-body p{
  color:var(--ink-2);
  font-size:15px;
  line-height:1.85;
  margin:0 0 20px;
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-meta{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-size:var(--fs-xs);
  color:var(--ink-3);
  font-variant-numeric:tabular-nums;
}
.post-meta .read{color:var(--brand);font-weight:600}

/* ============ 对照表 ============ */
.table-scroll{
  overflow-x:auto;
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  background:var(--surface);
  box-shadow:var(--shadow-soft);
}
.compare-table{min-width:760px;font-size:16px}
.compare-table caption{
  caption-side:top;
  text-align:left;
  padding:24px 28px 0;
  font-size:var(--fs-sm);
  color:var(--ink-3);
}
.compare-table th,
.compare-table td{
  text-align:left;
  padding:20px 28px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
.compare-table thead th{
  font-size:14px;
  letter-spacing:.06em;
  color:var(--ink-3);
  font-weight:700;
  background:var(--surface-2);
  border-bottom:1px solid var(--line);
}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table tbody tr{transition:background-color .18s var(--ease)}
.compare-table tbody tr:hover{background:rgba(236,233,251,.34)}
.compare-table td:first-child{font-weight:700;color:var(--ink)}
.compare-table td{color:var(--ink-2)}
.table-note{
  display:flex;
  align-items:flex-start;
  gap:12px;
  margin-top:24px;
  padding:18px 22px;
  border-radius:12px;
  background:var(--brand-soft);
  color:var(--ink-2);
  font-size:15px;
  line-height:1.8;
}
.table-note i{color:var(--brand);margin-top:4px}

/* ============ FAQ ============ */
.faq-accordion{
  max-width:860px;
  margin:0 auto;
  background:transparent;
  border:none;
  border-top:1px solid var(--line);
}
.faq-accordion .accordion-item{
  background:transparent;
  border:none;
  border-bottom:1px solid var(--line);
}
.faq-accordion .accordion-title{
  display:block;
  position:relative;
  padding:24px 52px 24px 0;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink);
  background:transparent;
  border:none;
  transition:color .22s var(--ease);
}
.faq-accordion .accordion-title:hover,
.faq-accordion .accordion-title:focus{background:transparent;color:var(--brand)}
.faq-accordion .accordion-title::before{
  content:"+";
  position:absolute;
  right:10px;
  top:50%;
  transform:translateY(-50%);
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--brand);
}
.faq-accordion .accordion-item.is-active > .accordion-title::before{content:"−";color:var(--accent)}
.faq-accordion .accordion-content{
  padding:0 52px 26px 0;
  background:transparent;
  border:none;
  color:var(--ink-2);
  font-size:16px;
  line-height:1.85;
}
.faq-accordion .accordion-content p:last-child{margin-bottom:0}

/* ============ 结尾 CTA ============ */
.cta-band{
  position:relative;
  background:var(--ink);
  color:#fff;
  padding:96px 0;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  opacity:.26;
}
.cta-band::after{
  content:"";
  position:absolute;left:0;top:0;height:100%;width:4px;
  background:linear-gradient(180deg,var(--lime),var(--accent));
}
.cta-inner{position:relative;z-index:2;max-width:760px}
.cta-inner h2{color:#fff;font-size:36px;margin-bottom:18px}
.cta-inner p{color:rgba(255,255,255,.76);font-size:17px;margin-bottom:32px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ============ 浮动 CTA ============ */
.float-cta{
  position:fixed;
  right:22px;
  top:50%;
  z-index:80;
  display:flex;
  flex-direction:column;
  gap:10px;
  align-items:stretch;
  transform:translateY(-50%) translateX(140%);
  transition:transform .36s var(--ease),opacity .36s var(--ease);
  opacity:0;
}
.float-cta.is-visible{transform:translateY(-50%) translateX(0);opacity:1}
.float-cta .btn{padding:13px 22px;font-size:15px}
.float-cta-icon{
  width:44px;height:44px;
  margin-left:auto;
  border-radius:50%;
  border:1.5px solid var(--line);
  background:var(--surface);
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  box-shadow:var(--shadow-soft);
  transition:background-color .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.float-cta-icon:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}

/* ============ 页脚 ============ */
.site-footer{
  background:#100E19;
  color:rgba(255,255,255,.72);
  padding:72px 0 0;
  font-size:var(--fs-sm);
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand .brand-name{color:#fff;font-size:18px}
.footer-brand p{
  margin:18px 0 0;
  color:rgba(255,255,255,.6);
  line-height:1.9;
  max-width:440px;
}
.footer-col h4{
  color:#fff;
  font-size:15px;
  margin-bottom:18px;
  letter-spacing:.02em;
}
.footer-col ul li{margin-bottom:12px;line-height:1.7}
.footer-col ul li a{color:rgba(255,255,255,.72)}
.footer-col ul li a:hover{color:var(--lime)}
.footer-col ul li span{color:rgba(255,255,255,.6)}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  padding:22px 0;
  border-top:1px solid rgba(255,255,255,.08);
  color:rgba(255,255,255,.5);
  font-size:var(--fs-xs);
}

/* ============ 滚动进入 ============ */
[data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .36s var(--ease),transform .36s var(--ease);
}
[data-reveal].is-inview{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (min-width:1440px){
  :root{--container:1280px}
}
@media (min-width:1600px){
  :root{--fs-h1:52px;--fs-h2:36px;--fs-display:68px;--container:1320px}
}
@media (max-width:1279px){
  :root{--fs-h1:42px;--fs-h2:32px;--fs-h3:22px}
  .hero{min-height:600px}
}
@media (max-width:1023px){
  :root{--nav-h:56px;--fs-h1:38px;--fs-h2:30px;--fs-h3:21px}
  .header-left{gap:20px}
  .main-nav{
    position:fixed;
    left:0;right:0;top:var(--nav-h);bottom:0;
    flex-direction:column;
    align-items:flex-start;
    gap:0;
    background:var(--bg);
    padding:24px;
    overflow-y:auto;
    transform:translateX(102%);
    transition:transform .3s var(--ease);
    box-shadow:0 18px 40px -18px rgba(23,20,35,.24);
  }
  .main-nav.is-open{transform:translateX(0)}
  .main-nav a{
    width:100%;
    padding:18px 4px;
    font-size:18px;
    font-weight:600;
    color:var(--ink);
    border-bottom:1px solid var(--line);
  }
  .main-nav a.is-active{color:var(--brand)}
  .main-nav a::after{display:none}
  .nav-toggle{display:inline-flex}
  .header-right .header-cta{display:none}
  .hero{padding-bottom:64px;min-height:540px}
  .hero-inner::before{display:none}
  .section{padding:76px 0}
  .section-head{margin-bottom:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1 / -1}
  .waterfall .waterfall-col:nth-child(3){margin-top:52px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  :root{--fs-h1:34px;--fs-h2:27px;--fs-h3:20px;--fs-body:16px}
  .hero{min-height:auto;padding-top:calc(var(--nav-h) + 56px);padding-bottom:56px}
  .hero h1{font-size:34px}
  .hero-sub{font-size:16px}
  .hero-actions .btn{width:100%}
  .hero-facts{gap:16px}
  .hero-facts li{font-size:13px}
  .point-item{grid-template-columns:1fr;gap:10px;padding:28px 0}
  .point-num{padding-top:0}
  .section{padding:60px 0}
  .cta-band{padding:64px 0}
  .cta-inner h2{font-size:28px}
  .cta-actions .btn{width:100%}
  .waterfall .waterfall-col{margin-top:0 !important}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:40px}
  .float-cta{
    right:0;left:0;bottom:0;top:auto;
    flex-direction:row;
    align-items:center;
    gap:12px;
    padding:10px 16px;
    background:rgba(251,250,247,.96);
    -webkit-backdrop-filter:blur(6px);
    backdrop-filter:blur(6px);
    border-top:1px solid var(--line);
    transform:translateY(120%);
    opacity:1;
  }
  .float-cta.is-visible{transform:translateY(0)}
  .float-cta .btn{flex:1;padding:12px 16px;font-size:15px}
  .float-cta-icon{width:42px;height:42px;margin-left:0;flex:0 0 auto}
  body{padding-bottom:74px}
}
@media (max-width:520px){
  .brand-name{font-size:17px}
  .hero-badge{font-size:12px;padding:6px 12px}
  .compare-table th,.compare-table td{padding:16px 18px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  [data-reveal]{opacity:1;transform:none}
  .float-cta{transform:translateY(-50%);opacity:1}
  .float-cta:not(.is-visible){opacity:.999}
  @media (max-width:767px){.float-cta{transform:none}}
}

/* roulang page: category2 */
/* ============ 1. 设计变量 ============ */
:root{
  --brand:#4B3ACB;
  --brand-deep:#2B1F86;
  --brand-soft:#ECE9FB;
  --accent:#14A08A;
  --lime:#C9F24D;
  --ink:#171423;
  --ink-2:#4A4553;
  --ink-3:#8A8494;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F2EFEA;
  --line:#E6E2DB;
  --r-card:16px;
  --r-btn:8px;
  --r-input:10px;
  --r-img:14px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(23,20,35,.06);
  --shadow-2:0 1px 2px rgba(23,20,35,.06),0 12px 32px -12px rgba(23,20,35,.12);
  --shadow-3:0 2px 4px rgba(23,20,35,.08),0 22px 48px -18px rgba(23,20,35,.28);
  --nav-h:68px;
  --section-y:112px;
  --gap:32px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
}

/* ============ 2. 重置与基础 ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-deep)}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,p{margin:0}
table{border-collapse:collapse}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
::selection{background:var(--brand);color:#fff}
section[id],div[id]{scroll-margin-top:88px}

/* ============ 3. 排版 ============ */
h1,h2,h3,h4{font-weight:800;line-height:1.22;letter-spacing:-.02em;color:var(--ink)}
h1{font-size:clamp(38px,5vw,64px);font-weight:900;line-height:1.1}
h2{font-size:clamp(28px,3.1vw,36px)}
h3{font-size:clamp(20px,1.9vw,24px)}
h4{font-size:18px}
p{color:var(--ink-2)}
strong{color:var(--ink);font-weight:700}
.num,.tabular{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:"Inter",var(--font-sans)}

/* ============ 4. 栅格与容器 ============ */
.container{width:100%;max-width:1280px;margin:0 auto;padding:0 24px}
.section{padding:var(--section-y) 0;position:relative}
.section-sand{background:var(--surface-2)}
.section-dark{background:var(--ink);color:#fff}
.section-dark h2,.section-dark h3{color:#fff}
.section-dark p{color:rgba(255,255,255,.72)}
.sec-head{max-width:760px;margin-bottom:56px}
.sec-head--center{margin-left:auto;margin-right:auto;text-align:center}
.sec-tag{display:inline-flex;align-items:center;gap:10px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--brand);margin-bottom:16px}
.sec-tag::before{content:"";width:22px;height:2px;background:var(--lime);flex:0 0 auto}
.section-dark .sec-tag{color:var(--lime)}
.sec-head h2{margin-bottom:16px}
.sec-head p{font-size:17px;line-height:1.9;max-width:64ch}
.sec-head--center p{margin:0 auto}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ============ 5. 头部与导航 ============ */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:200;
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:transparent;
  transition:background .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.94);
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  box-shadow:0 1px 0 rgba(23,20,35,.04);
}
.site-header.is-scrolled::after{background:var(--line)}
.nav-wrap{display:flex;align-items:center;gap:24px;height:var(--nav-h)}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  color:#fff;
  font-weight:800;
  letter-spacing:-.01em;
}
.brand-mark{
  width:32px;height:32px;
  border-radius:9px;
  background:var(--brand);
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;letter-spacing:-.02em;
  box-shadow:0 6px 18px -8px rgba(75,58,203,.9);
  flex:0 0 auto;
}
.brand-name{font-size:18px;line-height:1;white-space:nowrap}
.site-header.is-scrolled .brand{color:var(--ink)}
.main-nav{display:flex;align-items:center;gap:2px;flex:1 1 auto;margin-left:10px}
.main-nav a{
  position:relative;
  padding:8px 12px;
  font-size:15px;
  font-weight:500;
  color:rgba(255,255,255,.78);
  border-radius:8px;
  white-space:nowrap;
  transition:color .18s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--lime);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.main-nav a:hover{color:#fff}
.main-nav a:hover::after{transform:scaleX(1)}
.main-nav a.is-active{color:#fff;font-weight:600}
.main-nav a.is-active::after{transform:scaleX(1)}
.site-header.is-scrolled .main-nav a{color:var(--ink-2)}
.site-header.is-scrolled .main-nav a:hover,
.site-header.is-scrolled .main-nav a.is-active{color:var(--brand)}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-search{
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.3);
  background:transparent;
  color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;
  transition:all .18s var(--ease);
}
.nav-search:hover{border-color:#fff;background:rgba(255,255,255,.14)}
.site-header.is-scrolled .nav-search{color:var(--ink);border-color:var(--line);background:var(--surface)}
.site-header.is-scrolled .nav-search:hover{border-color:var(--brand);color:var(--brand)}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,.3);
  position:relative;
  flex:0 0 auto;
}
.nav-toggle i{
  position:absolute;left:50%;top:50%;
  transform:translate(-50%,-50%);
  width:18px;height:2px;border-radius:2px;background:#fff;
  transition:background .2s var(--ease);
}
.nav-toggle i::before,.nav-toggle i::after{
  content:"";position:absolute;left:0;
  width:18px;height:2px;border-radius:2px;background:#fff;
  transition:transform .2s var(--ease);
}
.nav-toggle i::before{top:-6px}
.nav-toggle i::after{top:6px}
.site-header.is-scrolled .nav-toggle{border-color:var(--line)}
.site-header.is-scrolled .nav-toggle i,
.site-header.is-scrolled .nav-toggle i::before,
.site-header.is-scrolled .nav-toggle i::after{background:var(--ink)}
.nav-drawer{
  position:fixed;
  inset:0;
  z-index:190;
  background:rgba(23,20,35,.98);
  padding:calc(var(--nav-h) + 24px) 24px 40px;
  transform:translateY(-100%);
  opacity:0;
  visibility:hidden;
  overflow-y:auto;
  transition:transform .34s var(--ease),opacity .28s var(--ease),visibility .34s;
}
.nav-drawer.is-open{transform:translateY(0);opacity:1;visibility:visible}
.drawer-nav{display:flex;flex-direction:column;margin-bottom:28px}
.drawer-nav a{
  padding:16px 4px;
  font-size:19px;
  font-weight:500;
  color:rgba(255,255,255,.8);
  border-bottom:1px solid rgba(255,255,255,.1);
}
.drawer-nav a:hover{color:#fff}
.drawer-nav a.is-active{color:#fff;font-weight:700;border-bottom-color:var(--lime)}
.drawer-cta{display:flex;flex-direction:column;gap:14px}
.drawer-note{font-size:14px;color:rgba(255,255,255,.5);line-height:1.8;margin-top:22px}

/* ============ 6. 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  line-height:1;
  padding:14px 28px;
  border-radius:var(--r-btn);
  border:1.5px solid transparent;
  cursor:pointer;
  white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-ghost-light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-ghost-light:hover{background:#fff;color:var(--ink);border-color:#fff;transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:15px;
  font-weight:600;
  color:var(--brand);
  position:relative;
  padding-bottom:4px;
}
.link-arrow::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  height:1.5px;
  width:0;
  background:var(--lime);
  transition:width .22s var(--ease);
}
.link-arrow:hover::after{width:100%}
.link-arrow i{font-size:12px;transition:transform .18s var(--ease)}
.link-arrow:hover i{transform:translateX(3px)}

/* ============ 7. 徽章 / 标签 / 面包屑 ============ */
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 16px 7px 12px;
  border:1px solid rgba(255,255,255,.22);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.06);
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  color:rgba(255,255,255,.88);
}
.hero-eyebrow .dot{
  width:8px;height:8px;border-radius:50%;
  background:var(--lime);
  box-shadow:0 0 0 4px rgba(201,242,77,.18);
  flex:0 0 auto;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.55)}
.breadcrumb a{color:rgba(255,255,255,.72)}
.breadcrumb a:hover{color:#fff}
.breadcrumb .sep{opacity:.45}
.breadcrumb .current{color:#fff;font-weight:500}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:6px 14px;
  border-radius:var(--r-pill);
  background:var(--surface-2);
  color:var(--ink-2);
  font-size:13px;
  font-weight:500;
  border:1px solid transparent;
  transition:all .18s var(--ease);
}
.chip:hover{background:var(--brand-soft);color:var(--brand);border-color:rgba(75,58,203,.24)}

/* ============ 8. 首屏 ============ */
.cat-hero{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  padding:calc(var(--nav-h) + 96px) 0 88px;
  isolation:isolate;
}
.cat-hero-bg{
  position:absolute;
  inset:0;
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center 42%;
  opacity:.4;
  z-index:0;
}
.cat-hero-overlay{
  position:absolute;
  inset:0;
  z-index:1;
  background:linear-gradient(180deg,rgba(23,20,35,.9) 0%,rgba(23,20,35,.72) 44%,rgba(23,20,35,.96) 100%);
}
.cat-hero-inner{position:relative;z-index:2}
.cat-hero h1{
  font-size:clamp(38px,5.6vw,72px);
  font-weight:900;
  line-height:1.08;
  letter-spacing:-.03em;
  color:#fff;
  margin:22px 0 20px;
  max-width:15em;
}
.cat-hero-sub{
  font-size:clamp(16px,1.4vw,19px);
  line-height:1.85;
  color:rgba(255,255,255,.76);
  max-width:660px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  margin-top:60px;
  border-top:1px solid rgba(255,255,255,.16);
  border-bottom:1px solid rgba(255,255,255,.16);
}
.strip-item{position:relative;padding:24px 22px 22px}
.strip-item::before{content:"";position:absolute;top:-1px;left:0;width:28px;height:2px;background:var(--lime)}
.strip-k{display:block;font-size:13px;letter-spacing:.06em;color:rgba(255,255,255,.55);margin-bottom:8px}
.strip-v{display:block;font-size:20px;font-weight:700;color:#fff;line-height:1.3}

/* ============ 9. 时间线 ============ */
.timeline{position:relative;max-width:900px;margin:0 auto;padding-left:8px}
.timeline::before{
  content:"";
  position:absolute;
  left:31px;
  top:18px;
  bottom:18px;
  width:1px;
  background:linear-gradient(180deg,var(--lime) 0%,var(--line) 85%);
}
.tl-item{position:relative;display:flex;gap:26px;padding-bottom:44px}
.tl-item:last-child{padding-bottom:0}
.tl-num{
  flex:0 0 46px;
  width:46px;height:46px;
  border-radius:13px;
  background:var(--surface);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:800;
  color:var(--brand);
  box-shadow:var(--shadow-1);
  position:relative;
  z-index:2;
}
.tl-body{padding-top:5px}
.tl-body h3{font-size:21px;margin-bottom:10px}
.tl-body p{font-size:16px;line-height:1.88;max-width:62ch}

/* ============ 10. 深色要素面板 ============ */
.elements-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);gap:56px;align-items:start}
.elements-copy h2{margin-bottom:18px}
.elements-list{margin-top:28px;display:grid;gap:14px}
.elements-list li{display:flex;gap:12px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.78)}
.elements-list li::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:11px;
  border-radius:2px;
  background:var(--lime);
}
.meter-panel{
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.12);
  border-radius:var(--r-card);
  padding:30px 28px;
}
.meter{padding:18px 0;border-bottom:1px solid rgba(255,255,255,.09)}
.meter:first-child{padding-top:0}
.meter:last-child{border-bottom:0;padding-bottom:0}
.meter-top{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:12px}
.meter-k{font-size:15px;font-weight:600;color:#fff}
.meter-v{font-size:13px;color:rgba(255,255,255,.6);white-space:nowrap}
.meter-bar{height:6px;border-radius:var(--r-pill);background:rgba(255,255,255,.12);overflow:hidden}
.meter-bar span{display:block;height:100%;border-radius:var(--r-pill);background:linear-gradient(90deg,var(--brand) 0%,var(--accent) 100%)}
.meter:nth-child(1) .meter-bar span{width:78%}
.meter:nth-child(2) .meter-bar span{width:64%}
.meter:nth-child(3) .meter-bar span{width:56%}
.meter:nth-child(4) .meter-bar span{width:88%}

/* ============ 11. 双列图文交替 ============ */
.media-row{
  display:grid;
  grid-template-columns:repeat(12,1fr);
  gap:var(--gap);
  align-items:center;
  margin-bottom:96px;
}
.media-row:last-child{margin-bottom:0}
.media-copy{grid-column:1 / 6}
.media-figure{grid-column:7 / 13}
.media-row.is-reverse .media-copy{grid-column:8 / 13;grid-row:1}
.media-row.is-reverse .media-figure{grid-column:1 / 7;grid-row:1}
.media-copy h3{margin-bottom:14px}
.media-copy p{font-size:16px;line-height:1.88;margin-bottom:14px}
.media-copy p:last-of-type{margin-bottom:20px}
.media-meta{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  color:var(--brand);
  margin-bottom:12px;
}
.media-points{display:grid;gap:12px;margin:0 0 22px}
.media-points li{display:flex;gap:10px;font-size:15px;line-height:1.75;color:var(--ink-2)}
.media-points li::before{
  content:"";
  flex:0 0 auto;
  width:7px;height:7px;
  margin-top:10px;
  border-radius:2px;
  background:var(--accent);
}
.media-figure img{
  width:100%;
  aspect-ratio:16 / 10;
  object-fit:cover;
  border-radius:var(--r-img);
  box-shadow:var(--shadow-2);
  transition:transform .18s var(--ease);
}
.media-figure:hover img{transform:scale(1.02)}

/* ============ 12. FAQ ============ */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:12px}
.faq-item{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--shadow-1);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.faq-item:hover{border-color:rgba(75,58,203,.38)}
.faq-item[open]{border-color:var(--brand);box-shadow:var(--shadow-2)}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  position:relative;
  padding:22px 62px 22px 24px;
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::marker{content:""}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:24px;top:50%;
  transform:translateY(-50%);
  font-size:22px;
  font-weight:400;
  line-height:1;
  color:var(--brand);
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{content:"−"}
.faq-a{padding:0 24px 22px;font-size:16px;line-height:1.86;color:var(--ink-2)}
.faq-a p{font-size:16px;line-height:1.86}

/* ============ 13. CTA ============ */
.cta-wrap{padding:0 0 var(--section-y)}
.cta-panel{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  border-radius:20px;
  padding:64px;
  display:grid;
  grid-template-columns:1.35fr .85fr;
  gap:40px;
  align-items:center;
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-90px;
  bottom:-120px;
  width:340px;height:340px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(75,58,203,.55) 0%,rgba(20,160,138,.18) 45%,transparent 72%);
  pointer-events:none;
}
.cta-panel h2{color:#fff;margin-bottom:16px;position:relative;z-index:2}
.cta-panel p{color:rgba(255,255,255,.72);max-width:52ch;position:relative;z-index:2}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;position:relative;z-index:2}
.cta-line{height:2px;width:56px;background:var(--lime);margin-bottom:24px}

/* ============ 14. 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:72px 0 0}
.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:56px;
}
.footer-brand .brand{color:#fff;margin-bottom:18px}
.footer-brand p{font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:46ch}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px;letter-spacing:0}
.footer-col ul{display:grid;gap:11px}
.footer-col a{color:rgba(255,255,255,.66);font-size:14px;line-height:1.7}
.footer-col a:hover{color:var(--lime)}
.footer-col span{display:block;font-size:14px;line-height:1.7;color:rgba(255,255,255,.5)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);
  padding:22px 0 26px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:rgba(255,255,255,.45);
}

/* ============ 15. 滚动进入动效 ============ */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s var(--ease),transform .36s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}

/* ============ 16. 响应式 ============ */
@media (max-width:1279px){
  :root{--section-y:96px}
}
@media (max-width:1023px){
  :root{--nav-h:64px;--section-y:80px;--gap:24px}
  .main-nav,.nav-search{display:none}
  .nav-toggle{display:inline-flex}
  .cat-hero{padding:calc(var(--nav-h) + 72px) 0 72px}
  .cat-hero h1{max-width:100%}
  .hero-strip{grid-template-columns:repeat(2,1fr);margin-top:48px}
  .elements-grid{grid-template-columns:1fr;gap:36px}
  .media-row{grid-template-columns:1fr;gap:24px;margin-bottom:64px}
  .media-copy,
  .media-figure,
  .media-row.is-reverse .media-copy,
  .media-row.is-reverse .media-figure{grid-column:1 / -1;grid-row:auto}
  .cta-panel{grid-template-columns:1fr;padding:44px 32px;gap:28px}
  .cta-actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  :root{--section-y:64px}
  body{font-size:16px}
  .container{padding:0 20px}
  .sec-head{margin-bottom:36px}
  .brand-name{font-size:16px}
  .hero-strip{grid-template-columns:1fr;margin-top:40px}
  .strip-item{padding:18px 0}
  .timeline{padding-left:0}
  .timeline::before{left:18px;top:14px;bottom:14px}
  .tl-item{gap:16px;padding-bottom:32px}
  .tl-num{flex:0 0 38px;width:38px;height:38px;border-radius:11px;font-size:14px}
  .tl-body{padding-top:2px}
  .tl-body h3{font-size:19px}
  .timeline::before{left:18px}
  .elements-list li{font-size:15px}
  .meter-panel{padding:24px 20px}
  .faq-item summary{padding:18px 54px 18px 18px;font-size:16px}
  .faq-a{padding:0 18px 18px;font-size:15px}
  .faq-a p{font-size:15px}
  .cta-panel{padding:36px 22px;border-radius:16px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:575px){
  .hero-actions .btn,.cta-actions .btn{width:100%}
  .btn{padding:13px 22px}
  .cat-hero h1{font-size:34px}
  .cat-hero-sub{font-size:16px}
  .media-figure img{aspect-ratio:16 / 11}
}
@media (min-width:1600px){
  :root{--section-y:132px}
  body{font-size:18px}
  .container{max-width:1360px}
}

/* roulang page: category4 */
:root{
  --brand:#4B3ACB;
  --brand-deep:#2B1F86;
  --brand-soft:#ECE9FB;
  --accent:#14A08A;
  --accent-soft:#E4F4F1;
  --lime:#C9F24D;
  --ink:#171423;
  --ink-2:#4A4553;
  --ink-3:#8A8494;
  --bg:#FBFAF7;
  --surface:#FFFFFF;
  --surface-2:#F2EFEA;
  --line:#E6E2DB;
  --r-card:16px;
  --r-btn:8px;
  --r-img:12px;
  --r-input:10px;
  --sh-1:0 1px 2px rgba(23,20,35,.06);
  --sh-2:0 12px 32px -12px rgba(23,20,35,.12);
  --sh-card:0 1px 2px rgba(23,20,35,.06),0 12px 32px -12px rgba(23,20,35,.12);
  --nav-h:68px;
  --sec-y:104px;
  --max:1280px;
}
@media (max-width:1023px){
  :root{--nav-h:56px;--sec-y:68px}
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-2);
  font-family:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color .22s ease}
a:hover,a:focus{color:var(--brand-deep)}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{margin:0;color:var(--ink);font-weight:800;letter-spacing:-.02em;line-height:1.22}
h1{font-size:clamp(30px,4vw,50px)}
h2{font-size:clamp(26px,2.8vw,36px)}
h3{font-size:20px;font-weight:700}
h4{font-size:16px;font-weight:700}
ul,ol{margin:0;padding:0}
button{font-family:inherit}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
@media (min-width:1024px){.container{padding:0 32px}}
@media (min-width:1600px){.container{max-width:1360px;padding:0 40px}}

/* Foundation 栅格微调 */
.grid-x{margin-left:-12px;margin-right:-12px}
.grid-x>.cell{padding-left:12px;padding-right:12px}
@media (min-width:1024px){
  .grid-x{margin-left:-16px;margin-right:-16px}
  .grid-x>.cell{padding-left:16px;padding-right:16px}
}

/* 导航 */
.site-header{
  position:sticky;top:0;left:0;right:0;z-index:60;
  height:var(--nav-h);
  display:flex;align-items:center;
  background:rgba(251,250,247,.82);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease,backdrop-filter .25s ease;
}
.site-header.is-scrolled{
  background:rgba(251,250,247,.92);
  border-bottom-color:var(--line);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
  box-shadow:0 1px 2px rgba(23,20,35,.04);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%}
.header-left{display:flex;align-items:center;gap:28px;min-width:0}
.header-right{display:flex;align-items:center;gap:12px;position:relative}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  background:var(--brand);color:#fff;
  display:grid;place-items:center;
  font-size:14px;font-weight:800;letter-spacing:.02em;
  font-variant-numeric:tabular-nums;
}
.brand-name{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-.01em;white-space:nowrap}
.brand:hover .brand-name{color:var(--brand)}
.main-nav{display:flex;align-items:center;gap:2px}
.main-nav a{
  display:inline-block;
  padding:8px 13px;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--ink-2);
  transition:color .2s ease,background .2s ease;
  white-space:nowrap;
}
.main-nav a:hover{color:var(--brand);background:var(--brand-soft)}
.main-nav a.is-active{color:var(--brand);background:var(--brand-soft);font-weight:700}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:16px;font-weight:600;line-height:1.2;
  border:1.5px solid transparent;cursor:pointer;
  transition:transform .2s cubic-bezier(.2,.7,.2,1),background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
  text-align:center;
}
.btn-sm{padding:10px 18px;font-size:14.5px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.icon-btn{
  width:40px;height:40px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);
  display:grid;place-items:center;cursor:pointer;font-size:14px;
  transition:color .2s ease,border-color .2s ease,transform .2s ease;
}
.icon-btn:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-2px)}
.icon-btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.search-panel{
  position:absolute;top:calc(var(--nav-h) - 8px);right:0;
  display:none;align-items:center;gap:10px;
  padding:12px;border-radius:14px;
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-card);
  width:360px;max-width:calc(100vw - 48px);
}
.search-panel.is-open{display:flex}
.search-panel input{
  flex:1;height:44px;padding:0 14px;border-radius:var(--r-input);
  border:1px solid var(--line);background:var(--bg);color:var(--ink);
  font-size:15px;font-family:inherit;
}
.search-panel input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(75,58,203,.14)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  align-items:center;justify-content:center;flex-direction:column;gap:4px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.nav-toggle:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
@media (max-width:1023px){
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .header-right .btn{display:none}
  .search-panel{position:fixed;top:calc(var(--nav-h) + 8px);right:16px;left:16px;width:auto}
}

/* 移动抽屉 */
.mobile-drawer{
  position:fixed;inset:0;z-index:80;
  background:var(--bg);
  transform:translateX(101%);
  transition:transform .3s cubic-bezier(.2,.7,.2,1);
  padding:20px 24px 40px;
  display:flex;flex-direction:column;overflow-y:auto;
}
.mobile-drawer.is-open{transform:translateX(0)}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:28px}
.drawer-links{display:flex;flex-direction:column;gap:4px;margin-bottom:32px}
.drawer-links a{
  padding:16px 12px;border-radius:12px;
  font-size:17px;font-weight:600;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer-links a.is-active{color:var(--brand);background:var(--brand-soft);border-color:transparent}
.drawer-cta{margin-top:auto;display:grid;gap:12px}

/* 面包屑 */
.breadcrumb{padding:20px 0 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-3)}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:var(--line)}
.breadcrumb a{color:var(--ink-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600}

/* Hero */
.hero{position:relative;padding:24px 0 var(--sec-y);overflow:hidden}
.hero::before{
  content:"";position:absolute;left:0;top:0;width:58%;height:100%;
  background:linear-gradient(180deg,#F4F1FE 0%,rgba(251,250,247,0) 84%);
  z-index:0;pointer-events:none;
}
.hero>.container{position:relative;z-index:1}
.hero-grid{margin-top:28px}
.hero-copy{max-width:620px}
.hero h1{margin:22px 0 0}
.hero-sub{font-size:18px;line-height:1.8;color:var(--ink-2);margin:20px 0 0;max-width:520px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.status-bar{
  display:inline-flex;align-items:center;gap:10px;
  padding:6px 15px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);box-shadow:var(--sh-1);
}
.status-dot{
  width:8px;height:8px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px rgba(20,160,138,.16);
}
.trust-row{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:32px;list-style:none}
.trust-row li{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2)}
.trust-row i{color:var(--accent);font-size:13px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:20px;box-shadow:var(--sh-card);
}
.hero-visual::after{
  content:"";position:absolute;left:-4px;bottom:26px;
  width:68px;height:3px;border-radius:2px;background:var(--lime);
}
@media (max-width:1023px){
  .hero-grid{margin-top:8px}
  .hero-visual{margin-top:36px}
  .hero-visual img{aspect-ratio:auto;height:260px;border-radius:16px}
  .hero-visual::after{left:0;bottom:14px;width:52px}
}

/* 板块 */
.section{padding:var(--sec-y) 0}
.section--sand{background:var(--surface-2)}
.section--ink{background:var(--ink);color:rgba(255,255,255,.72)}
.section--ink h2,.section--ink h3{color:#fff}
.section-head{max-width:740px;margin-bottom:52px}
.section-head h2{margin:16px 0 14px}
.section-sub{font-size:16px;line-height:1.85;color:var(--ink-3);margin:0}
.section--ink .section-sub{color:rgba(255,255,255,.66)}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--brand);
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--lime)}
.eyebrow--light{color:#fff}

/* 步骤带 */
.step-band{
  display:grid;grid-template-columns:repeat(5,minmax(0,1fr));
  gap:20px;list-style:none;position:relative;margin:56px 0 0;
}
.step-band::before{
  content:"";position:absolute;top:22px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,rgba(201,242,77,.95),rgba(201,242,77,.12));
}
.step-item{position:relative;z-index:1}
.step-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--surface);border:1px solid var(--line);
  color:var(--brand);font-weight:800;font-size:15px;
  font-variant-numeric:tabular-nums;box-shadow:var(--sh-1);
}
.step-item h3{margin:18px 0 8px;font-size:18px}
.step-item p{margin:0;font-size:14.5px;line-height:1.8;color:var(--ink-3)}
@media (max-width:1023px){
  .step-band{grid-template-columns:1fr;gap:26px;margin-top:36px}
  .step-band::before{display:none}
  .step-item{display:grid;grid-template-columns:44px minmax(0,1fr);column-gap:16px;align-items:start}
  .step-body{grid-column:2}
  .step-item h3{margin:2px 0 8px}
}

/* 卡片 */
.card-grid{display:grid;gap:24px}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-card);border-color:var(--brand)}
.card:focus-visible{outline:2px solid var(--lime);outline-offset:3px}
.card-media{position:relative;aspect-ratio:16/10;background:var(--surface-2);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .18s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-badge{
  position:absolute;left:14px;top:14px;
  padding:5px 12px;border-radius:999px;
  background:rgba(23,20,35,.74);color:#fff;
  font-size:12px;font-weight:600;line-height:1.6;
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.card-body{padding:24px 24px 20px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-title{font-size:19px;font-weight:700;line-height:1.45;color:var(--ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color .18s ease}
.card:hover .card-title{color:var(--brand)}
.card-text{margin:0;font-size:15px;line-height:1.8;color:var(--ink-3);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{
  margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-3);
}
.card-foot .more{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand)}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:36px}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.chip:hover{color:var(--brand);background:var(--brand-soft);border-color:transparent}

/* 时效面板 */
.sla-grid{margin-top:8px}
.sla-copy h2{margin:16px 0 14px}
.sla-copy p{color:rgba(255,255,255,.66);font-size:16px;line-height:1.85}
.sla-note{
  margin-top:24px;padding:16px 18px;border-radius:12px;
  background:rgba(255,255,255,.05);border-left:3px solid var(--lime);
  font-size:14px;color:rgba(255,255,255,.7);line-height:1.8;
}
.metric-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media (min-width:640px){.metric-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.metric{
  padding:26px 22px;border-radius:var(--r-card);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  transition:transform .2s ease,border-color .2s ease;
}
.metric:hover{transform:translateY(-4px);border-color:rgba(201,242,77,.4)}
.metric-num{
  font-size:38px;font-weight:800;color:#fff;line-height:1.05;
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
}
.metric-num span{font-size:15px;font-weight:600;color:var(--lime);margin-left:4px;letter-spacing:0}
.metric p{margin:10px 0 0;font-size:14px;line-height:1.75;color:rgba(255,255,255,.62)}

/* FAQ */
.faq-wrap{
  max-width:860px;margin:0 auto;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);padding:6px 28px;box-shadow:var(--sh-1);
}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 2px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:6px}
.faq-icon{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--line);color:var(--brand);
  display:grid;place-items:center;font-size:12px;
  transition:transform .26s ease,background .26s ease,color .26s ease,border-color .26s ease;
}
.faq-item.is-open .faq-icon{background:var(--brand);border-color:var(--brand);color:#fff;transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-a-inner{padding:0 46px 24px 2px;font-size:16px;line-height:1.85;color:var(--ink-2)}

/* CTA + 表单 */
.cta-panel{margin-top:8px}
.cta-copy h2{margin:16px 0 14px}
.cta-copy p{color:rgba(255,255,255,.68);font-size:16px;line-height:1.85;max-width:460px}
.service-form{margin-top:8px}
.form-field{margin-bottom:18px}
.service-form label{display:block;font-size:13px;font-weight:600;color:rgba(255,255,255,.62);margin-bottom:8px}
.service-form input,.service-form textarea{
  width:100%;border-radius:var(--r-input);
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.06);color:#fff;
  font-family:inherit;font-size:15px;line-height:1.7;
  padding:0 14px;height:48px;margin:0;
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.service-form textarea{height:auto;padding:12px 14px;resize:vertical}
.service-form input::placeholder,.service-form textarea::placeholder{color:rgba(255,255,255,.34)}
.service-form input:focus,.service-form textarea:focus{
  outline:none;border-color:var(--lime);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 3px rgba(201,242,77,.2);
}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:6px}
.form-note{font-size:13px;color:rgba(255,255,255,.5);line-height:1.7}
.form-success{
  margin-top:18px;padding:14px 18px;border-radius:12px;
  background:var(--surface-2);color:var(--ink);font-size:14.5px;line-height:1.75;
}

/* 页脚 */
.site-footer{background:var(--ink);color:rgba(255,255,255,.6);padding:76px 0 0;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1.2fr 1.1fr;gap:44px}}
.footer-brand .brand-name{color:#fff}
.footer-brand p{margin:18px 0 0;line-height:1.9;color:rgba(255,255,255,.58)}
.footer-col h4{color:#fff;font-size:15px;margin:0 0 16px;font-weight:700}
.footer-col ul{list-style:none;display:grid;gap:11px}
.footer-col a,.footer-col span{color:rgba(255,255,255,.58);font-size:14px;line-height:1.75}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  margin-top:60px;padding:22px 0 26px;
  border-top:1px solid rgba(255,255,255,.08);
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.42);
}

/* 返回顶部 */
.to-top{
  position:fixed;right:22px;bottom:22px;z-index:50;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:var(--surface);color:var(--ink-2);cursor:pointer;
  display:grid;place-items:center;font-size:14px;
  box-shadow:var(--sh-card);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,color .2s ease;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover{color:var(--brand);transform:translateY(-2px)}
.to-top:focus-visible{outline:2px solid var(--lime);outline-offset:2px}

/* 进场动效 */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .36s cubic-bezier(.2,.7,.2,1),transform .36s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none !important;transition:none !important}
}

.reveal{opacity:1 !important;transform:none !important}