/* roulang page: index */
:root{
  --ink-0:#0A0B0D;
  --ink-1:#101317;
  --ink-2:#16191E;
  --ink-3:#1C2027;
  --line:rgba(255,255,255,.08);
  --line-brand:rgba(47,227,181,.35);
  --brand:#2FE3B5;
  --amber:#FFB454;
  --text:#F2F4F7;
  --text-2:#A7AFBA;
  --text-3:#6E7683;
  --on-brand:#06110E;
  --danger:#FF5C5C;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow-card:0 24px 48px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --font-base:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --w-container:1200px;
  --gap:24px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--font-base);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
ul,ol{list-style:none;margin:0;padding:0;}
p{margin:0;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer;}
input,textarea{font:inherit;color:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}
::selection{background:rgba(47,227,181,.28);color:#fff;}

.container{
  width:100%;
  max-width:var(--w-container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0;position:relative;}
.section--tight{padding:72px 0;}
.section--dark{background:var(--ink-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  border:1px solid var(--line-brand);
  background:rgba(47,227,181,.12);
  color:var(--brand);
  font-size:13px;
  letter-spacing:.04em;
  line-height:1.4;
  font-weight:600;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 10px rgba(47,227,181,.9);
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:40px;
  flex-wrap:wrap;
}
.section-title{
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.2;
  font-weight:700;
  margin-top:16px;
}
.section-lead{
  color:var(--text-2);
  font-size:16px;
  line-height:1.8;
  max-width:620px;
  margin-top:12px;
}
.link-more{
  color:var(--brand);
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding-bottom:2px;
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,color .25s ease;
}
.link-more:hover{border-bottom-color:var(--brand);color:#fff;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:48px;
  padding:0 26px;
  border-radius:var(--r-btn);
  font-weight:700;
  font-size:15px;
  line-height:1;
  letter-spacing:.01em;
  cursor:pointer;
  transition:transform .22s ease,background-color .22s ease,box-shadow .22s ease,color .22s ease,border-color .22s ease;
  border:1px solid transparent;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);
  color:var(--on-brand);
  box-shadow:0 0 0 1px rgba(47,227,181,.5),0 18px 36px -22px rgba(47,227,181,.9);
}
.btn-primary:hover{transform:translateY(-1px);background:#3ff0c3;}
.btn-primary:active{transform:translateY(0);background:#28cfA4;}
.btn-ghost{
  background:transparent;
  border-color:rgba(47,227,181,.45);
  color:var(--brand);
}
.btn-ghost:hover{transform:translateY(-1px);background:rgba(47,227,181,.1);border-color:var(--brand);}
.btn-ghost:active{transform:translateY(0);background:rgba(47,227,181,.16);}
.btn-line{
  background:transparent;
  color:var(--text-2);
  border-color:var(--line);
}
.btn-line:hover{color:var(--text);border-color:rgba(255,255,255,.22);transform:translateY(-1px);}
.btn-sm{min-height:40px;padding:0 18px;font-size:14px;}
.btn-block{width:100%;}
.btn[disabled]{opacity:.5;cursor:not-allowed;transform:none;}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:rgba(10,11,13,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:28px;height:28px;
  border-radius:8px;
  background:linear-gradient(135deg,var(--brand),#1b9d7d 70%);
  box-shadow:0 0 18px -4px rgba(47,227,181,.8), inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
}
.logo-mark::after{
  content:"";
  position:absolute;
  inset:8px;
  border-radius:3px;
  border:1.5px solid rgba(6,17,14,.75);
  border-right-color:transparent;
  border-bottom-color:transparent;
  transform:rotate(45deg);
}
.logo-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
}
.nav-menu ul{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:14.5px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .22s ease,background-color .22s ease;
}
.nav-menu a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-menu a.is-active{color:var(--brand);}
.nav-menu a.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--brand);
  box-shadow:0 0 12px var(--brand);
}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:10px;
  border:1px solid var(--line);
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
  transition:border-color .22s ease,background-color .22s ease;
}
.nav-toggle:hover{border-color:var(--line-brand);background:rgba(47,227,181,.08);}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--text);
  border-radius:2px;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.nav-drawer{
  position:fixed;
  inset:68px 0 0 0;
  z-index:80;
  background:rgba(10,11,13,.98);
  backdrop-filter:blur(14px);
  padding:16px 24px 32px;
  display:flex;
  flex-direction:column;
  gap:4px;
  transform:translateY(-12px);
  opacity:0;
  pointer-events:none;
  transition:opacity .25s ease,transform .25s ease;
  overflow-y:auto;
}
.nav-drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.nav-drawer a{
  display:block;
  padding:16px 4px;
  border-bottom:1px solid var(--line);
  color:var(--text-2);
  font-size:16px;
  font-weight:600;
}
.nav-drawer a.is-active{color:var(--brand);}
.nav-drawer .btn{margin-top:20px;width:100%;}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  padding:88px 0 96px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;
  top:-220px;left:-160px;
  width:620px;height:620px;
  background:radial-gradient(circle,rgba(47,227,181,.16),transparent 62%);
  pointer-events:none;
}
.hero::after{
  content:"";
  position:absolute;
  top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.5),transparent);
}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
  position:relative;
  z-index:1;
}
.hero-copy > *{animation:fadeUp .5s ease both;}
.hero-copy > *:nth-child(1){animation-delay:.02s;}
.hero-copy > *:nth-child(2){animation-delay:.10s;}
.hero-copy > *:nth-child(3){animation-delay:.18s;}
.hero-copy > *:nth-child(4){animation-delay:.26s;}
.hero-copy > *:nth-child(5){animation-delay:.34s;}
@keyframes fadeUp{
  from{opacity:0;transform:translateY(14px);}
  to{opacity:1;transform:translateY(0);}
}
.hero h1{
  font-size:clamp(34px,5.2vw,60px);
  line-height:1.12;
  letter-spacing:-.02em;
  font-weight:800;
  margin:20px 0 0;
}
.hero h1 .accent{
  color:var(--brand);
  text-shadow:0 0 42px rgba(47,227,181,.35);
}
.hero-sub{
  color:var(--text-2);
  font-size:17px;
  line-height:1.8;
  max-width:560px;
  margin-top:18px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:32px;
}
.hero-stats{
  display:flex;
  align-items:stretch;
  gap:0;
  margin-top:44px;
  flex-wrap:wrap;
}
.hero-stat{
  padding:0 26px;
  border-left:1px solid var(--line);
}
.hero-stat:first-child{padding-left:0;border-left:none;}
.hero-stat-num{
  font-family:var(--font-mono);
  font-size:24px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
  letter-spacing:-.02em;
}
.hero-stat-label{
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.04em;
  margin-top:4px;
  white-space:nowrap;
}
.hero-media{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid rgba(47,227,181,.25);
  box-shadow:var(--shadow-card);
  background:var(--ink-2);
}
.hero-media img{
  width:100%;
  aspect-ratio:4/3.4;
  object-fit:cover;
}
.hero-media::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,.15) 0%,rgba(10,11,13,.55) 62%,rgba(10,11,13,.94) 100%);
  pointer-events:none;
}
.hero-media-line{
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:linear-gradient(90deg,transparent,var(--brand),transparent);
  box-shadow:0 0 18px rgba(47,227,181,.9);
  z-index:2;
}
.hero-media-cap{
  position:absolute;
  left:24px;right:24px;bottom:24px;
  z-index:2;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--text-2);
}
.hero-media-cap .tag{
  background:rgba(10,11,13,.7);
  border:1px solid var(--line-brand);
  color:var(--brand);
}

/* ---------- 标签与徽章 ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 10px;
  border-radius:999px;
  font-size:13px;
  line-height:1.6;
  letter-spacing:.02em;
  background:rgba(47,227,181,.12);
  border:1px solid rgba(47,227,181,.3);
  color:var(--brand);
  font-weight:600;
  white-space:nowrap;
}
.tag--amber{
  background:rgba(255,180,84,.12);
  border-color:rgba(255,180,84,.3);
  color:var(--amber);
}
.tag--plain{
  background:rgba(255,255,255,.05);
  border-color:var(--line);
  color:var(--text-2);
}

/* ---------- 价值区 ---------- */
.value-grid{
  display:grid;
  grid-template-columns:4fr 8fr;
  gap:56px;
  align-items:start;
}
.value-intro .section-title{margin-top:16px;}
.value-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.value-item{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  transition:transform .25s ease,border-color .25s ease,background-color .25s ease,box-shadow .25s ease;
}
.value-item:hover{
  transform:translateY(-4px);
  border-color:rgba(47,227,181,.35);
  background:var(--ink-3);
  box-shadow:0 0 32px -10px rgba(47,227,181,.3);
}
.value-num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--brand);
  letter-spacing:.12em;
}
.value-item h3{
  font-size:18px;
  margin:10px 0 8px;
  font-weight:700;
}
.value-item p{
  font-size:14.5px;
  color:var(--text-2);
  line-height:1.75;
}

/* ---------- 三步上手 ---------- */
.steps{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  margin-top:8px;
}
.step{
  position:relative;
  padding:0 32px 28px 0;
  border-bottom:1px solid var(--line);
}
.step + .step{padding-left:32px;}
.step + .step::before{
  content:"";
  position:absolute;
  left:0;top:14px;
  width:1px;height:calc(100% - 28px);
  background:repeating-linear-gradient(180deg,var(--line) 0 6px,transparent 6px 12px);
}
.step-dot{
  position:absolute;
  left:-4px;top:8px;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 14px rgba(47,227,181,.95);
}
.step + .step .step-dot{left:28px;}
.step:first-child .step-dot{display:none;}
.step-num{
  font-family:var(--font-mono);
  font-size:40px;
  line-height:1;
  font-weight:700;
  color:var(--brand);
  letter-spacing:-.04em;
  opacity:.9;
}
.step h3{
  font-size:20px;
  margin:16px 0 10px;
}
.step p{
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
  max-width:320px;
}

/* ---------- 品类导航 ---------- */
.cat-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:20px;
}
.cat-card{
  display:grid;
  grid-template-columns:132px 1fr;
  gap:20px;
  align-items:stretch;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:16px;
  transition:transform .25s ease,border-color .25s ease,background-color .25s ease,box-shadow .25s ease;
}
.cat-card:hover{
  transform:translateY(-4px);
  border-color:rgba(47,227,181,.4);
  background:var(--ink-3);
  box-shadow:0 0 32px -10px rgba(47,227,181,.35);
}
.cat-thumb{
  border-radius:var(--r-img);
  overflow:hidden;
  background:var(--ink-1);
  border:1px solid var(--line);
}
.cat-thumb img{
  width:100%;height:100%;
  min-height:110px;
  object-fit:cover;
}
.cat-body{display:flex;flex-direction:column;justify-content:center;}
.cat-body h3{
  font-size:18px;
  margin:10px 0 8px;
  color:var(--text);
}
.cat-card:hover .cat-body h3{color:#fff;}
.cat-body p{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
}
.cat-link{
  margin-top:12px;
  font-size:13px;
  font-weight:700;
  color:var(--brand);
  display:inline-flex;
  align-items:center;
  gap:6px;
}

/* ---------- 案例证明 ---------- */
.proof-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:20px;
  align-items:stretch;
}
.proof-main{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  display:flex;
  flex-direction:column;
  transition:border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.proof-main:hover{
  border-color:rgba(47,227,181,.4);
  box-shadow:0 0 36px -12px rgba(47,227,181,.35);
  transform:translateY(-4px);
}
.proof-main-img{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.proof-main-img img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  transition:transform .5s ease;
}
.proof-main:hover .proof-main-img img{transform:scale(1.03);}
.proof-main-body{padding:24px;}
.proof-main-body h3{font-size:20px;margin:12px 0 10px;}
.proof-main-body p{color:var(--text-2);font-size:15px;line-height:1.8;}
.proof-stats{
  display:flex;
  gap:32px;
  margin-top:20px;
  padding-top:20px;
  border-top:1px solid var(--line);
  flex-wrap:wrap;
}
.proof-stat-num{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  color:var(--brand);
  line-height:1.2;
}
.proof-stat-label{font-size:13px;color:var(--text-3);margin-top:2px;}
.proof-side{display:flex;flex-direction:column;gap:20px;}
.proof-small{
  flex:1;
  background:transparent;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  transition:border-color .25s ease,background-color .25s ease,transform .25s ease;
}
.proof-small:hover{
  border-color:rgba(47,227,181,.4);
  background:rgba(22,25,30,.7);
  transform:translateY(-3px);
}
.proof-small h4{font-size:17px;margin:12px 0 8px;font-weight:700;}
.proof-small p{font-size:14px;color:var(--text-2);line-height:1.75;}

/* ---------- 内容动态 ---------- */
.news-list{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.news-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:22px 24px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-left:3px solid rgba(47,227,181,.4);
  border-radius:12px;
  transition:background-color .25s ease,border-color .25s ease,box-shadow .25s ease,transform .25s ease;
}
.news-card:hover{
  background:var(--ink-3);
  border-left-color:var(--brand);
  border-color:rgba(47,227,181,.3);
  box-shadow:0 0 28px -14px rgba(47,227,181,.6);
  transform:translateY(-2px);
}
.news-meta{
  display:flex;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-3);
}
.news-title{
  font-size:18px;
  font-weight:700;
  margin:10px 0 6px;
  color:var(--text);
  line-height:1.5;
}
.news-desc{
  font-size:14px;
  color:var(--text-2);
  line-height:1.7;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.news-arrow{
  flex-shrink:0;
  width:38px;height:38px;
  border-radius:50%;
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-3);
  font-size:15px;
  transition:color .25s ease,border-color .25s ease,background-color .25s ease;
}
.news-card:hover .news-arrow{color:var(--brand);border-color:var(--line-brand);background:rgba(47,227,181,.1);}
.news-empty{
  display:flex;
  align-items:center;
  gap:16px;
  padding:36px 24px;
  border:1px dashed rgba(47,227,181,.28);
  border-radius:12px;
  background:rgba(22,25,30,.5);
  color:var(--text-2);
  font-size:15px;
}
.news-empty-icon{
  width:40px;height:40px;
  flex-shrink:0;
  border-radius:50%;
  border:1px solid var(--line-brand);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);
  font-size:18px;
}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:860px;margin:0 auto;}
.faq-item{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .25s ease,background-color .25s ease;
}
.faq-item:hover{border-color:rgba(255,255,255,.16);}
.faq-item.is-open{border-color:rgba(47,227,181,.32);background:var(--ink-3);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:20px 24px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  line-height:1.6;
  position:relative;
  transition:color .22s ease;
}
.faq-q:hover{color:#fff;}
.faq-item.is-open .faq-q{color:var(--brand);}
.faq-item.is-open .faq-q::before{
  content:"";
  position:absolute;
  left:0;top:16px;bottom:16px;
  width:3px;
  border-radius:3px;
  background:var(--brand);
  box-shadow:0 0 12px rgba(47,227,181,.8);
}
.faq-icon{
  flex-shrink:0;
  width:22px;height:22px;
  position:relative;
  transition:transform .24s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
  top:50%;left:50%;
}
.faq-icon::before{width:14px;height:2px;transform:translate(-50%,-50%);}
.faq-icon::after{width:2px;height:14px;transform:translate(-50%,-50%);}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 24px 22px 24px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
}

/* ---------- CTA 表单 ---------- */
.cta-box{
  position:relative;
  border-radius:20px;
  padding:56px;
  background:linear-gradient(160deg,rgba(47,227,181,.09),rgba(255,180,84,.05) 78%,rgba(22,25,30,.9));
  border:1px solid rgba(47,227,181,.28);
  overflow:hidden;
}
.cta-box::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--brand) 45%,var(--amber) 78%,transparent);
  opacity:.9;
}
.cta-inner{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:start;
  position:relative;
  z-index:1;
}
.cta-copy h2{
  font-size:clamp(26px,3.2vw,36px);
  line-height:1.24;
  margin:16px 0 14px;
}
.cta-copy p{color:var(--text-2);font-size:15.5px;line-height:1.8;max-width:440px;}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:10px;}
.cta-points li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:var(--text-2);
  font-size:14.5px;
  line-height:1.7;
}
.cta-points li::before{
  content:"";
  width:6px;height:6px;
  flex-shrink:0;
  margin-top:9px;
  border-radius:50%;
  background:var(--brand);
  box-shadow:0 0 10px rgba(47,227,181,.85);
}
.form-card{
  background:rgba(10,11,13,.72);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px;
  backdrop-filter:blur(6px);
}
.field{margin-bottom:16px;}
.field label{
  display:block;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--text-2);
  margin-bottom:8px;
  font-weight:600;
}
.field input,
.field textarea{
  width:100%;
  min-height:48px;
  padding:12px 14px;
  background:#0E1116;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  color:var(--text);
  font-size:15px;
  line-height:1.6;
  transition:border-color .22s ease,box-shadow .22s ease,background-color .22s ease;
}
.field textarea{min-height:96px;resize:vertical;}
.field input::placeholder,
.field textarea::placeholder{color:var(--text-3);}
.field input:hover,
.field textarea:hover{border-color:rgba(255,255,255,.18);}
.field input:focus,
.field textarea:focus{
  outline:none;
  border-color:rgba(47,227,181,.6);
  box-shadow:0 0 0 3px rgba(47,227,181,.18);
  background:#0d1316;
}
.field.has-error input,
.field.has-error textarea{border-color:var(--danger);box-shadow:0 0 0 3px rgba(255,92,92,.16);}
.field-error{display:none;color:var(--danger);font-size:12px;margin-top:6px;}
.field.has-error .field-error{display:block;}
.privacy-note{
  font-size:12.5px;
  color:var(--text-3);
  line-height:1.7;
  margin-top:12px;
}
.form-success{
  display:none;
  align-items:center;
  gap:12px;
  padding:20px;
  border-radius:12px;
  border:1px solid rgba(47,227,181,.35);
  background:rgba(47,227,181,.1);
  color:var(--brand);
  font-size:15px;
  line-height:1.7;
}
.form-success.is-visible{display:flex;}
.form-card.is-sent form{display:none;}
.form-card.is-sent .form-success{display:flex;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  background:var(--ink-1);
  padding:64px 0 0;
  margin-top:0;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.6),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.2fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:14px;}
.footer-brand p{
  color:var(--text-2);
  font-size:14px;
  line-height:1.8;
  max-width:300px;
}
.footer-col h4{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:16px;
}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  font-size:14px;
  color:var(--text-2);
  transition:color .22s ease;
}
.footer-col a:hover{color:var(--brand);}
.footer-contact li{
  font-size:14px;
  color:var(--text-2);
  line-height:1.8;
  margin-bottom:10px;
  display:flex;
  gap:8px;
}
.footer-contact span:first-child{color:var(--text-3);flex-shrink:0;}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 28px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-3);transition:color .22s ease;}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .value-grid{gap:40px;}
  .step{padding-right:24px;}
  .step + .step{padding-left:24px;}
}
@media (max-width:1024px){
  .section{padding:72px 0;}
  .nav-menu{display:none;}
  .nav-toggle{display:flex;}
  .nav-right .btn{display:none;}
  .hero{padding:64px 0 72px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-media{order:2;}
  .hero-media img{aspect-ratio:16/9;}
  .value-grid{grid-template-columns:1fr;gap:32px;}
  .cat-grid{grid-template-columns:1fr;}
  .proof-grid{grid-template-columns:1fr;}
  .cta-inner{grid-template-columns:1fr;gap:32px;}
  .cta-box{padding:36px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  .steps{grid-template-columns:1fr;}
  .step{padding:0 0 24px 0;border-bottom:1px solid var(--line);}
  .step + .step{padding-left:24px;}
  .step + .step::before{
    left:0;top:0;
    width:1px;height:100%;
    background:repeating-linear-gradient(180deg,var(--line) 0 6px,transparent 6px 12px);
  }
  .step:not(:first-child) .step-dot{display:block;left:-4px;top:10px;}
  .step-num{font-size:32px;}
  .value-list{grid-template-columns:1fr;}
  .hero-stats{gap:0;flex-wrap:wrap;}
  .hero-stat{padding:0 18px;}
  .hero-stat-num{font-size:20px;}
  .news-card{flex-direction:column;align-items:flex-start;gap:14px;}
  .news-arrow{display:none;}
  .cta-box{padding:28px;}
  .form-card{padding:20px;}
  .footer-grid{grid-template-columns:1fr;}
  .faq-q{font-size:16px;padding:18px 20px;}
  .faq-a-inner{padding:0 20px 18px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .hero{padding:48px 0 56px;}
  .hero-sub{font-size:15.5px;}
  .hero-actions .btn{width:100%;}
  .hero-stat{padding:0 14px;}
  .hero-stat-label{font-size:12px;}
  .cat-card{grid-template-columns:1fr;}
  .cat-thumb img{min-height:150px;aspect-ratio:16/9;}
  .proof-main-body{padding:20px;}
  .proof-small{padding:20px;}
  .value-item{padding:20px;}
  .cta-box{padding:22px;}
  .news-card{padding:18px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .logo-text{font-size:16px;}
}
@media (max-width:400px){
  .hero-stat{padding:0 10px;}
  .hero-stat-num{font-size:18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .hero-copy > *{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink-0:#0A0B0D;
  --ink-1:#101317;
  --ink-2:#16191E;
  --ink-3:#1C2027;
  --line:rgba(255,255,255,.08);
  --line-brand:rgba(47,227,181,.35);
  --brand:#2FE3B5;
  --brand-12:rgba(47,227,181,.12);
  --brand-30:rgba(47,227,181,.3);
  --brand-45:rgba(47,227,181,.45);
  --amber:#FFB454;
  --amber-12:rgba(255,180,84,.12);
  --text:#F2F4F7;
  --muted:#A7AFBA;
  --dim:#6E7683;
  --on-brand:#06110E;
  --danger:#FF5C5C;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-card:0 24px 48px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --container:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding-left:1.15em}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea{font-family:inherit;font-size:inherit}
::selection{background:rgba(47,227,181,.25);color:#fff}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,11,13,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em}
.logo-mark{
  width:22px;height:22px;border-radius:7px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),#1a9c7c);
  box-shadow:0 0 18px -4px rgba(47,227,181,.75), inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:6px;border-radius:3px;
  background:var(--ink-0);
}
.logo-text{font-size:17px;color:var(--text)}
.logo:hover .logo-text{color:var(--brand)}
.nav-menu ul{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0}
.nav-menu a{
  position:relative;display:inline-block;
  padding:10px 12px;border-radius:8px;
  font-size:14.5px;color:var(--muted);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-menu a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-menu a.is-active{color:var(--brand)}
.nav-menu a.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:-2px;height:2px;
  background:var(--brand);border-radius:2px;
  box-shadow:0 0 12px var(--brand);
}
.nav-actions{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  padding:11px 20px;
  font-size:14.5px;font-weight:700;line-height:1.2;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .25s var(--ease);
  border:1px solid transparent;
  white-space:nowrap;
}
.btn-primary{
  background:var(--brand);color:var(--on-brand);
  box-shadow:0 12px 30px -18px rgba(47,227,181,.9), inset 0 1px 0 rgba(255,255,255,.28);
}
.btn-primary:hover{transform:translateY(-1px);background:#3defc1;color:var(--on-brand)}
.btn-primary:active{transform:translateY(0);background:#27cba1}
.btn-ghost{
  background:transparent;color:var(--brand);border-color:var(--brand-45);
}
.btn-ghost:hover{background:var(--brand-12);color:var(--brand);transform:translateY(-1px)}
.btn-text{
  color:var(--muted);padding:10px 4px;font-weight:600;
  border-bottom:1px solid transparent;border-radius:0;
}
.btn-text:hover{color:var(--brand);border-bottom-color:var(--brand-45)}
.nav-toggle{
  display:none;width:42px;height:38px;border-radius:10px;
  border:1px solid var(--line);background:var(--ink-2);
  align-items:center;justify-content:center;
}
.nav-toggle span{
  display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative;
}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;
  transition:transform .24s var(--ease);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-drawer{
  display:none;position:fixed;inset:68px 0 0 0;z-index:55;
  background:rgba(10,11,13,.98);
  border-top:1px solid var(--line);
  padding:18px 20px 32px;
  overflow-y:auto;
}
.nav-drawer.is-open{display:block}
.nav-drawer ul{list-style:none;margin:0;padding:0}
.nav-drawer li{border-bottom:1px solid var(--line)}
.nav-drawer a{display:block;padding:16px 4px;font-size:16px;color:var(--muted)}
.nav-drawer a.is-active{color:var(--brand)}
.nav-drawer .btn{width:100%;margin-top:20px}

/* ============ 文章头部 ============ */
.article-hero{
  position:relative;
  padding:44px 0 0;
  background:
    radial-gradient(900px 320px at 12% -10%, rgba(47,227,181,.10), transparent 70%),
    var(--ink-0);
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--brand-30),transparent);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--dim);letter-spacing:.02em;margin-bottom:22px;
}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(255,255,255,.22)}
.breadcrumb .current{color:var(--text);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{max-width:820px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:13px;letter-spacing:.04em;font-weight:600;
  background:var(--brand-12);color:var(--brand);
  border:1px solid var(--brand-30);
}
.badge-amber{background:var(--amber-12);color:var(--amber);border-color:rgba(255,180,84,.3)}
.article-head h1{
  margin:16px 0 0;
  font-size:clamp(28px,4.2vw,46px);
  font-weight:800;line-height:1.2;letter-spacing:-.02em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;
  margin-top:20px;font-size:13.5px;color:var(--dim);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.22)}
.article-meta .mono{font-family:var(--font-mono);font-size:13px;color:var(--muted)}
.article-cover{
  margin:32px 0 0;border-radius:var(--r-card);
  overflow:hidden;border:1px solid rgba(47,227,181,.25);
  box-shadow:var(--shadow-card);
  position:relative;
}
.article-cover img{width:100%;height:auto;border-radius:0;aspect-ratio:16/7;object-fit:cover}
.article-cover::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,.05) 40%,rgba(10,11,13,.62) 100%);
  pointer-events:none;
}

/* ============ 正文 ============ */
.article-main{padding:64px 0 0}
.article-layout{display:block}
.article-body{
  max-width:760px;
  margin:0 auto;
  font-size:17px;
  line-height:1.85;
  color:#DCE1E8;
}
.article-body > * + *{margin-top:1.1em}
.article-body h2{
  font-size:clamp(22px,2.6vw,29px);
  font-weight:700;line-height:1.3;color:var(--text);
  margin-top:2em;padding-left:14px;position:relative;letter-spacing:-.01em;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:3px;
  background:var(--brand);border-radius:3px;box-shadow:0 0 14px rgba(47,227,181,.6);
}
.article-body h3{
  font-size:20px;font-weight:700;color:var(--text);margin-top:1.7em;line-height:1.4;
}
.article-body h4{font-size:17px;font-weight:600;color:var(--text);margin-top:1.4em}
.article-body p{color:#C6CDD6}
.article-body strong{color:var(--text);font-weight:700}
.article-body a{color:var(--brand);border-bottom:1px solid var(--brand-30)}
.article-body a:hover{border-bottom-color:var(--brand)}
.article-body ul,.article-body ol{margin-top:1em;padding-left:1.3em;color:#C6CDD6}
.article-body li + li{margin-top:.5em}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:1.6em 0;padding:18px 22px;
  background:rgba(47,227,181,.06);
  border-left:3px solid var(--brand);
  border-radius:0 12px 12px 0;
  color:#D7DEE6;
}
.article-body blockquote p{color:#D7DEE6;margin:0}
.article-body img{margin:1.6em auto;border-radius:var(--r-img);border:1px solid var(--line)}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:13px;color:var(--dim);text-align:center;margin-top:10px}
.article-body code{
  font-family:var(--font-mono);font-size:.88em;
  background:rgba(255,255,255,.07);color:#8CF0D6;
  padding:2px 6px;border-radius:6px;
}
.article-body pre{
  margin:1.6em 0;padding:18px 20px;overflow-x:auto;
  background:#0C0F13;border:1px solid var(--line);
  border-radius:12px;font-size:14px;line-height:1.7;
}
.article-body pre code{background:none;padding:0;color:#B9E9DA}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
}
.article-body th,.article-body td{
  padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);
}
.article-body th{background:rgba(255,255,255,.04);color:var(--text);font-weight:600}
.article-body tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.article-body hr{border:0;height:1px;background:var(--line);margin:2.2em 0}

/* ============ 尾部 ============ */
.article-foot{max-width:760px;margin:52px auto 0}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.tag-row .label{font-size:13px;letter-spacing:.06em;color:var(--dim);margin-right:4px}
.tag{
  display:inline-flex;align-items:center;padding:6px 13px;
  font-size:13px;border-radius:var(--r-pill);
  color:var(--muted);background:var(--ink-2);border:1px solid var(--line);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.tag:hover{color:var(--brand);border-color:var(--brand-30);background:var(--brand-12)}
.article-divider{
  height:1px;margin:36px 0;
  background:linear-gradient(90deg,transparent,var(--brand-30),transparent);
}
.back-row{display:flex;flex-wrap:wrap;gap:12px}

/* ============ 空态 ============ */
.empty-box{
  max-width:760px;margin:0 auto;
  padding:48px 28px;text-align:center;
  background:var(--ink-1);border:1px dashed rgba(255,255,255,.14);
  border-radius:var(--r-card);
}
.empty-box .empty-icon{
  width:46px;height:46px;margin:0 auto 18px;border-radius:14px;
  border:1px solid var(--brand-30);background:var(--brand-12);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand);font-size:20px;font-weight:700;font-family:var(--font-mono);
}
.empty-box h2{font-size:20px;font-weight:700;margin-bottom:10px}
.empty-box p{color:var(--muted);font-size:15px;margin-bottom:22px}

/* ============ 栏目推荐 ============ */
.section{padding:96px 0 0}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:32px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:13px;letter-spacing:.06em;font-weight:600;
  color:var(--brand);background:var(--brand-12);border:1px solid var(--brand-30);
}
.section-head h2{
  margin-top:14px;
  font-size:clamp(24px,3.2vw,36px);font-weight:700;line-height:1.2;letter-spacing:-.015em;
}
.section-head p{color:var(--muted);font-size:15px;max-width:56ch;margin-top:10px}
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{
  display:flex;flex-direction:column;
  background:var(--ink-2);border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;
  position:relative;overflow:hidden;
  transition:transform .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease);
}
.card::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:3px;
  background:var(--brand);opacity:.4;border-radius:3px;transition:opacity .25s var(--ease);
}
.card:hover{
  transform:translateY(-4px);
  background:var(--ink-3);
  border-color:var(--line-brand);
  box-shadow:0 0 32px -10px rgba(47,227,181,.3);
}
.card:hover::before{opacity:1}
.card .card-kicker{
  font-family:var(--font-mono);font-size:13px;color:var(--brand);
  letter-spacing:.08em;margin-bottom:10px;
}
.card h3{font-size:18px;font-weight:700;line-height:1.4;color:var(--text)}
.card p{font-size:14px;color:var(--muted);line-height:1.75;margin-top:10px}
.card .card-more{
  margin-top:auto;padding-top:16px;
  font-size:13.5px;font-weight:600;color:var(--brand);
}
.card:hover h3{color:var(--brand)}

/* ============ CTA ============ */
.cta-section{padding:96px 0}
.cta-panel{
  position:relative;overflow:hidden;
  border-radius:20px;
  padding:56px 44px;
  background:
    radial-gradient(700px 260px at 88% 0%, rgba(255,180,84,.14), transparent 65%),
    radial-gradient(700px 300px at 8% 100%, rgba(47,227,181,.16), transparent 60%),
    var(--ink-1);
  border:1px solid var(--line-brand);
  box-shadow:var(--shadow-card);
}
.cta-panel h2{
  font-size:clamp(24px,3.4vw,38px);font-weight:800;line-height:1.25;letter-spacing:-.02em;
  max-width:20ch;
}
.cta-panel p{color:var(--muted);font-size:15.5px;max-width:56ch;margin-top:14px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.cta-note{font-size:13px;color:var(--dim);margin-top:18px}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:8px;
  background:var(--ink-1);
  border-top:1px solid var(--line);
  position:relative;
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.55),transparent);
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:40px;padding:64px 0 44px;
}
.footer-brand p{
  margin-top:16px;font-size:14px;line-height:1.85;color:var(--muted);max-width:34ch;
}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--dim);
  margin-bottom:16px;
}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:11px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--brand)}
.footer-contact li{
  display:flex;justify-content:space-between;gap:14px;
  font-size:13.5px;color:var(--muted);
}
.footer-contact li span:first-child{color:var(--dim)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  padding:20px 0 28px;border-top:1px solid var(--line);
  font-size:13px;color:var(--dim);
}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:960px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:1024px){
  .nav-menu{display:none}
  .nav-actions .btn-primary{display:none}
  .nav-toggle{display:inline-flex}
  .article-main{padding-top:48px}
  .section,.cta-section{padding-top:64px}
  .section{padding-bottom:0}
  .cta-section{padding-bottom:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;padding:48px 0 36px}
  .cta-panel{padding:44px 32px}
}
@media (max-width:768px){
  .article-cover img{aspect-ratio:16/9}
  .article-body{font-size:16px}
  .article-meta{gap:8px 14px}
  .breadcrumb .current{max-width:100%;white-space:normal}
}
@media (max-width:640px){
  .container{padding:0 20px}
  body{font-size:15.5px}
  .article-hero{padding-top:32px}
  .article-main{padding-top:40px}
  .section{padding-top:48px}
  .cta-section{padding:48px 0}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .cta-panel{padding:34px 22px;border-radius:16px}
  .cta-actions .btn{width:100%}
  .back-row .btn{width:100%}
  .article-head h1{font-size:26px}
  .logo-text{font-size:16px}
  .empty-box{padding:36px 20px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.btn:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --ink-0:#0A0B0D;
  --ink-1:#101317;
  --ink-2:#16191E;
  --ink-3:#1C2027;
  --line:rgba(255,255,255,.08);
  --accent:#2FE3B5;
  --accent-soft:rgba(47,227,181,.12);
  --accent-line:rgba(47,227,181,.35);
  --amber:#FFB454;
  --amber-soft:rgba(255,180,84,.12);
  --danger:#FF5C5C;
  --text:#F2F4F7;
  --text-2:#A7AFBA;
  --text-3:#6E7683;
  --on-accent:#06110E;
  --r-card:16px;
  --r-img:12px;
  --r-btn:10px;
  --shadow:0 24px 48px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --container:1200px;
  --header-h:68px;
  --font-cn:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  padding-top:var(--header-h);
}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover{color:var(--accent);}
button,input,textarea,select{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:96px 0;}
.section--tight{padding:72px 0;}
.section-head{max-width:720px;margin-bottom:40px;}
.section-head h2{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:999px;
  background:var(--accent-soft);
  border:1px solid var(--accent-line);
  color:var(--accent);
  font-size:13px;
  letter-spacing:.08em;
  line-height:1.4;
}
.eyebrow--amber{
  background:var(--amber-soft);
  border-color:rgba(255,180,84,.32);
  color:var(--amber);
}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:90;
  background:rgba(10,11,13,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  height:var(--header-h);
  display:flex;
  align-items:center;
  gap:28px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:16px;height:16px;border-radius:5px;
  background:linear-gradient(135deg,var(--accent),#1ab894);
  box-shadow:0 0 18px -2px rgba(47,227,181,.7);
  display:inline-block;
}
.logo-text{font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--text);}
.logo:hover .logo-text{color:var(--accent);}
.nav-menu{flex:1;}
.nav-menu ul{display:flex;align-items:center;gap:4px;}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:10px 12px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  white-space:nowrap;
}
.nav-menu a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-menu a.is-active{color:var(--accent);}
.nav-menu a.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 12px var(--accent);
}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:auto;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  line-height:1.2;
  border:1px solid transparent;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn-primary{
  background:var(--accent);
  color:var(--on-accent);
  border-color:var(--accent);
  box-shadow:0 12px 28px -16px rgba(47,227,181,.9);
}
.btn-primary:hover{background:#3ff0c4;color:var(--on-accent);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);background:#26cda1;}
.btn-ghost{
  background:transparent;
  color:var(--accent);
  border-color:rgba(47,227,181,.45);
}
.btn-ghost:hover{background:var(--accent-soft);color:var(--accent);transform:translateY(-1px);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-block{width:100%;}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none;}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--ink-2);
  padding:0;
  place-items:center;
  gap:4px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  border-radius:2px;
  background:var(--text);
  transition:transform .25s ease,opacity .25s ease;
}
.mobile-nav{
  display:none;
  border-top:1px solid var(--line);
  background:var(--ink-1);
  max-height:calc(100vh - var(--header-h));
  overflow-y:auto;
}
.mobile-nav ul li{border-bottom:1px solid var(--line);}
.mobile-nav ul li a{display:block;padding:16px 24px;font-size:16px;color:var(--text-2);}
.mobile-nav ul li a.is-active{color:var(--accent);box-shadow:inset 3px 0 0 var(--accent);}
.mobile-nav .mobile-cta{padding:20px 24px 28px;}
body.nav-open .mobile-nav{display:block;}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg);}
body.nav-open .nav-toggle span:nth-child(2){opacity:0;}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* ---------- breadcrumb ---------- */
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--text-3);
  padding:28px 0 0;
}
.crumbs a{color:var(--text-2);}
.crumbs span.sep{color:var(--text-3);}
.crumbs .current{color:var(--accent);}

/* ---------- hero ---------- */
.page-hero{
  position:relative;
  padding:36px 0 64px;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:-20% -10% auto auto;
  width:640px;height:640px;
  background:radial-gradient(circle,rgba(47,227,181,.12),transparent 62%);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:48px;
  align-items:center;
}
.page-hero h1{
  font-size:clamp(34px,5.2vw,60px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
  margin:20px 0 18px;
}
.page-hero h1 em{
  font-style:normal;
  color:var(--accent);
}
.hero-lead{
  color:var(--text-2);
  font-size:17px;
  max-width:560px;
}
.hero-lead + .hero-lead{margin-top:10px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.hero-points{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  margin-top:34px;
  border-top:1px solid var(--line);
  padding-top:20px;
}
.hero-points div{
  padding-right:26px;
  margin-right:26px;
  border-right:1px solid var(--line);
}
.hero-points div:last-child{border-right:0;margin-right:0;padding-right:0;}
.hero-points strong{
  display:block;
  font-family:var(--font-mono);
  font-size:24px;
  color:var(--accent);
  letter-spacing:-.02em;
}
.hero-points span{font-size:13px;color:var(--text-3);letter-spacing:.04em;}
.hero-figure{
  position:relative;
  border-radius:var(--r-card);
  border:1px solid rgba(47,227,181,.25);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.hero-figure img{
  width:100%;
  height:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:0;
}
.hero-figure::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:55%;
  background:linear-gradient(to top,rgba(10,11,13,.92),rgba(10,11,13,0));
  pointer-events:none;
}
.hero-figure figcaption{
  position:absolute;
  left:20px;right:20px;bottom:18px;
  z-index:2;
  font-size:13px;
  color:var(--text-2);
  letter-spacing:.04em;
}
.hero-figure::before{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  z-index:3;
  background:linear-gradient(90deg,transparent,var(--accent),transparent);
  opacity:.7;
}

/* ---------- split block ---------- */
.split{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:56px;
  align-items:start;
}
.split-title h2{
  font-size:clamp(24px,3vw,36px);
  font-weight:700;
  line-height:1.22;
  letter-spacing:-.01em;
}
.split-title p{margin-top:16px;color:var(--text-2);font-size:15px;}
.num-list{counter-reset:step;display:grid;gap:2px;}
.num-list li{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:20px;
  padding:22px 4px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s ease;
}
.num-list li:first-child{border-top:1px solid var(--line);}
.num-list li:hover{background:rgba(255,255,255,.02);}
.num-list .idx{
  font-family:var(--font-mono);
  font-size:22px;
  font-weight:700;
  color:var(--accent);
  line-height:1.4;
}
.num-list h3{font-size:18px;font-weight:700;line-height:1.5;}
.num-list p{margin-top:6px;font-size:15px;color:var(--text-2);}

/* ---------- detail block ---------- */
.detail-panel{
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:48px;
  background:var(--ink-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:40px;
  box-shadow:var(--shadow);
}
.detail-panel h2{
  font-size:clamp(22px,2.6vw,32px);
  line-height:1.26;
  font-weight:700;
}
.detail-copy p{color:var(--text-2);font-size:15.5px;}
.detail-copy p + p{margin-top:14px;}
.note-box{
  margin-top:22px;
  display:flex;
  gap:14px;
  padding:16px 18px;
  border-radius:12px;
  background:var(--amber-soft);
  border:1px solid rgba(255,180,84,.3);
  color:#FFD5A0;
  font-size:14.5px;
  line-height:1.75;
}
.note-box .dot{
  flex-shrink:0;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--amber);
  margin-top:9px;
  box-shadow:0 0 10px rgba(255,180,84,.8);
}

/* ---------- timeline ---------- */
.timeline{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:32px;
  position:relative;
  margin-top:8px;
}
.timeline::before{
  content:"";
  position:absolute;
  top:26px;left:6%;right:6%;
  border-top:1px dashed rgba(47,227,181,.32);
}
.tl-item{
  position:relative;
  background:var(--ink-1);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:28px 24px;
  box-shadow:var(--shadow);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.tl-item:hover{
  transform:translateY(-4px);
  border-color:var(--accent-line);
  box-shadow:0 0 32px -10px rgba(47,227,181,.3),var(--shadow);
}
.tl-item .node{
  position:absolute;
  top:-8px;left:24px;
  width:14px;height:14px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 14px rgba(47,227,181,.9);
}
.tl-item .num{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.12em;
}
.tl-item h3{margin-top:8px;font-size:19px;font-weight:700;}
.tl-item p{margin-top:10px;font-size:15px;color:var(--text-2);}
.tl-item .tag{margin-top:16px;}

/* ---------- gallery ---------- */
.gallery-grid{
  display:grid;
  grid-template-columns:1.25fr .75fr;
  gap:24px;
}
.media-card{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--ink-2);
  transition:border-color .25s ease,transform .25s ease;
}
.media-card:hover{border-color:var(--accent-line);transform:translateY(-4px);}
.media-card img{width:100%;height:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;}
.media-card .cap{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:20px;
  background:linear-gradient(to top,rgba(10,11,13,.95),rgba(10,11,13,0));
}
.media-card .cap h3{font-size:18px;font-weight:700;}
.media-card .cap p{margin-top:6px;font-size:14px;color:var(--text-2);}
.stack{display:grid;gap:24px;}
.text-card{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--ink-1);
  padding:24px;
  transition:border-color .25s ease,background-color .25s ease;
}
.text-card:hover{border-color:var(--accent-line);background:var(--ink-3);}
.text-card h3{font-size:17px;font-weight:700;margin-top:12px;}
.text-card p{margin-top:8px;font-size:14.5px;color:var(--text-2);}

/* ---------- badges ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  padding:4px 12px;
  border-radius:999px;
  font-size:13px;
  line-height:1.5;
  letter-spacing:.04em;
  background:var(--accent-soft);
  border:1px solid var(--accent-line);
  color:var(--accent);
}
.tag--amber{background:var(--amber-soft);border-color:rgba(255,180,84,.32);color:var(--amber);}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:900px;}
.faq-item{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  transition:border-color .24s ease,background-color .24s ease;
}
.faq-item.is-open{border-color:var(--accent-line);box-shadow:0 0 32px -18px rgba(47,227,181,.6);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:18px 22px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  position:relative;
}
.faq-q:hover{color:var(--accent);}
.faq-item.is-open .faq-q::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:3px;
  background:var(--accent);
}
.faq-icon{
  flex-shrink:0;
  width:22px;height:22px;
  position:relative;
  transition:transform .24s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";
  position:absolute;
  background:var(--accent);
  border-radius:2px;
}
.faq-icon::before{left:0;right:0;top:10px;height:2px;}
.faq-icon::after{top:0;bottom:0;left:10px;width:2px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 22px 20px;
  font-size:15px;
  line-height:1.8;
  color:var(--text-2);
}

/* ---------- cta ---------- */
.cta-section{
  position:relative;
  padding:96px 0;
  background:
    linear-gradient(rgba(10,11,13,.86),rgba(10,11,13,.94)),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  border-top:1px solid var(--line);
}
.cta-box{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  background:rgba(16,19,23,.9);
  border:1px solid var(--accent-line);
  border-radius:var(--r-card);
  padding:44px;
  box-shadow:var(--shadow);
}
.cta-box h2{
  font-size:clamp(24px,3vw,36px);
  line-height:1.24;
  font-weight:700;
  letter-spacing:-.01em;
}
.cta-box h2 em{font-style:normal;color:var(--accent);}
.cta-box p{margin-top:14px;color:var(--text-2);font-size:15.5px;}
.cta-meta{display:grid;gap:10px;margin-top:24px;}
.cta-meta li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2);}
.cta-meta li::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--accent);
  flex-shrink:0;
  margin-top:9px;
  box-shadow:0 0 8px rgba(47,227,181,.9);
}
.form-grid{display:grid;gap:14px;}
.field label{
  display:block;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--text-3);
  margin-bottom:6px;
}
.field input,.field textarea{
  width:100%;
  min-height:48px;
  padding:13px 14px;
  border-radius:var(--r-btn);
  background:#0E1116;
  border:1px solid var(--line);
  color:var(--text);
  font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{resize:vertical;min-height:92px;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(47,227,181,.6);
  box-shadow:0 0 0 3px rgba(47,227,181,.18);
}
.form-note{font-size:12.5px;color:var(--text-3);line-height:1.7;}
.form-success{
  display:none;
  padding:18px 20px;
  border-radius:12px;
  background:var(--accent-soft);
  border:1px solid var(--accent-line);
  color:var(--accent);
  font-size:15px;
  line-height:1.7;
}
.form-success.is-visible{display:block;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--ink-0);
  border-top:1px solid var(--line);
  padding:64px 0 0;
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.8),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr .8fr .9fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  color:var(--text-2);
  max-width:320px;
  line-height:1.8;
}
.footer-col h4{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--accent);}
.footer-contact li{
  display:flex;
  justify-content:space-between;
  gap:14px;
  font-size:13.5px;
  color:var(--text-2);
  padding-bottom:8px;
  border-bottom:1px dashed rgba(255,255,255,.06);
}
.footer-contact li span:first-child{color:var(--text-3);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:12px 24px;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:960px;}
  .hero-grid{gap:36px;}
}
@media (max-width:1023px){
  .section{padding:64px 0;}
  .section--tight{padding:56px 0;}
  .nav-menu{display:none;}
  .nav-toggle{display:grid;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .page-hero{padding:24px 0 48px;}
  .hero-figure{order:2;}
  .split{grid-template-columns:1fr;gap:28px;}
  .detail-panel{grid-template-columns:1fr;padding:30px;gap:24px;}
  .timeline{grid-template-columns:1fr;gap:20px;}
  .timeline::before{display:none;}
  .tl-item .node{position:static;margin-bottom:14px;}
  .gallery-grid{grid-template-columns:1fr;}
  .cta-box{grid-template-columns:1fr;padding:32px;gap:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-section{padding:64px 0;}
}
@media (max-width:640px){
  body{font-size:15.5px;}
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .section--tight{padding:44px 0;}
  .header-actions .btn-primary{display:none;}
  .page-hero h1{margin:16px 0 14px;}
  .hero-actions .btn{width:100%;}
  .hero-points{gap:16px;}
  .hero-points div{
    border-right:0;
    padding-right:0;
    margin-right:0;
    min-width:44%;
  }
  .num-list li{grid-template-columns:44px 1fr;gap:14px;padding:18px 0;}
  .faq-q{font-size:16px;padding:16px 18px;}
  .faq-a-inner{padding:0 18px 18px;}
  .detail-panel{padding:24px;}
  .cta-box{padding:24px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .page-hero::before{display:none;}
  .tl-item{padding:22px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .tl-item:hover,.media-card:hover{transform:none;}
}

/* roulang page: category2 */
:root{
  --ink-0:#0A0B0D;
  --ink-1:#101317;
  --ink-2:#16191E;
  --ink-3:#1C2027;
  --line:rgba(255,255,255,.08);
  --line-neon:rgba(47,227,181,.35);
  --primary:#2FE3B5;
  --primary-2:#45E8BD;
  --primary-dim:rgba(47,227,181,.12);
  --accent:#FFB454;
  --text:#F2F4F7;
  --text-2:#A7AFBA;
  --text-3:#6E7683;
  --on-primary:#06110E;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 24px 48px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --container:1200px;
  --sans:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{list-style:none;margin:0;padding:0}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
input,textarea,select{font:inherit}
::selection{background:rgba(47,227,181,.28);color:#fff}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--primary);color:var(--on-primary);padding:10px 16px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:6px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,11,13,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  position:relative;width:24px;height:24px;border-radius:8px;
  background:linear-gradient(135deg,var(--primary),#17836b);
  box-shadow:0 0 18px -4px rgba(47,227,181,.9);
}
.logo-mark::after{content:"";position:absolute;inset:7px;border-radius:2px;background:var(--ink-0)}
.logo-text{font-size:17px;font-weight:800;letter-spacing:.02em;color:var(--text)}
.logo:hover .logo-text{color:var(--primary)}
.logo-text,.logo-mark{transition:color .2s,transform .2s}
.logo:hover .logo-mark{transform:rotate(-6deg)}
.nav-menu{margin-left:auto}
.nav-menu ul{display:flex;align-items:center;gap:30px}
.nav-menu a{
  position:relative;display:block;padding:22px 0;
  font-size:15px;color:var(--text-2);
  transition:color .2s;
}
.nav-menu a:hover,.nav-menu a:focus-visible{color:var(--text)}
.nav-menu a.is-active{color:var(--primary)}
.nav-menu a.is-active::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--primary);box-shadow:0 0 12px var(--primary);
}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  background:transparent;border:1px solid var(--line);border-radius:10px;cursor:pointer;
  transition:border-color .2s,color .2s;
}
.nav-toggle:hover{border-color:var(--line-neon);color:var(--primary)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;transition:transform .2s;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
body.nav-open .nav-toggle span{background:transparent}
body.nav-open .nav-toggle span::before{transform:translateY(6px) rotate(45deg)}
body.nav-open .nav-toggle span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- Buttons / Badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background .18s ease,color .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--primary);color:var(--on-primary);box-shadow:0 12px 28px -16px rgba(47,227,181,.9)}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--primary);border-color:rgba(47,227,181,.45)}
.btn-outline:hover{background:var(--primary-dim);border-color:var(--primary);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text-2);border-color:var(--line)}
.btn-ghost:hover{color:var(--text);border-color:rgba(255,255,255,.22);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;
  font-size:13px;letter-spacing:.04em;
  background:var(--primary-dim);color:var(--primary);
  border:1px solid rgba(47,227,181,.3);
}
.badge-warn{background:rgba(255,180,84,.12);color:var(--accent);border-color:rgba(255,180,84,.3)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:84px 0 72px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-1.png) center/cover no-repeat;
  opacity:.16;
  -webkit-mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
  mask-image:linear-gradient(180deg,#000 0%,transparent 78%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.35fr 1fr;gap:52px;align-items:center}
.hero h1{
  margin-top:20px;
  font-size:clamp(34px,5.2vw,60px);
  font-weight:800;line-height:1.12;letter-spacing:-.02em;
}
.hero-lead{margin-top:20px;color:var(--text-2);font-size:17px;max-width:36em}
.hero-lead + .hero-lead{margin-top:8px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:38px}
.stat{padding-left:16px;border-left:1px solid var(--line)}
.stat-num{font-family:var(--mono);font-size:23px;font-weight:700;color:var(--primary);line-height:1.2}
.stat-label{font-size:13px;color:var(--text-3);letter-spacing:.04em}
.hero-visual{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid rgba(47,227,181,.25);
  box-shadow:var(--shadow-card);
}
.hero-visual img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .5s ease}
.hero-visual:hover img{transform:scale(1.03)}
.hero-visual::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,0) 42%,rgba(10,11,13,.9) 100%);
  pointer-events:none;
}
.hero-visual .visual-tag{
  position:absolute;left:18px;bottom:18px;z-index:2;
}

/* ---------- Sections ---------- */
.section{padding:96px 0}
.section-tight{padding:0 0 96px}
.section-head{max-width:740px;margin-bottom:40px}
.section-kicker{font-family:var(--mono);font-size:13px;letter-spacing:.16em;color:var(--primary);text-transform:uppercase}
.section-title{margin-top:12px;font-size:clamp(26px,3.4vw,40px);font-weight:700;line-height:1.2;letter-spacing:-.01em}
.section-desc{margin-top:14px;color:var(--text-2);font-size:16px}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- Stage image band ---------- */
.stage{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.stage img{width:100%;height:360px;object-fit:cover;opacity:.62;transition:transform .6s ease,opacity .4s ease}
.stage:hover img{transform:scale(1.02);opacity:.7}
.stage-caption{
  position:absolute;left:0;right:0;bottom:0;padding:28px;
  background:linear-gradient(0deg,rgba(10,11,13,.96) 0%,rgba(10,11,13,.55) 55%,transparent 100%);
}
.stage-caption h2{font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.3}
.stage-caption p{margin-top:8px;color:var(--text-2);font-size:15px;max-width:52ch}

/* ---------- Numbered point list ---------- */
.point-list{margin-top:36px;border-top:1px solid var(--line)}
.point{
  display:grid;grid-template-columns:96px minmax(0,1fr) auto;gap:24px;align-items:start;
  padding:26px 8px;border-bottom:1px solid var(--line);
  transition:background .2s ease,padding-left .2s ease;
}
.point:hover{background:rgba(255,255,255,.025);padding-left:16px}
.point-num{font-family:var(--mono);font-size:28px;font-weight:700;color:var(--primary);letter-spacing:-.02em;line-height:1.2}
.point h3{font-size:20px;font-weight:700}
.point p{margin-top:6px;color:var(--text-2);font-size:15px}
.point .tag{
  align-self:center;white-space:nowrap;
  padding:5px 12px;border-radius:999px;font-size:13px;
  color:var(--text-2);border:1px solid var(--line);background:var(--ink-2);
}

/* ---------- Split block ---------- */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start}
.split-title{
  font-size:clamp(24px,2.8vw,34px);font-weight:700;line-height:1.28;letter-spacing:-.01em;
  position:sticky;top:100px;
}
.split-title .accent{color:var(--primary)}
.split-body p{color:var(--text-2);margin-bottom:16px}
.split-body h3{font-size:18px;font-weight:700;color:var(--text);margin:26px 0 8px}
.split-body h3:first-child{margin-top:0}
.split-body ul{margin:8px 0 16px}
.split-body li{
  position:relative;padding-left:20px;color:var(--text-2);font-size:15px;margin-bottom:8px;
}
.split-body li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--primary);
}

/* ---------- Check list ---------- */
.check-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:32px}
.check-item{
  display:flex;gap:14px;padding:22px;border-radius:14px;
  background:var(--ink-1);border:1px solid var(--line);
  transition:border-color .2s ease,transform .2s ease,background .2s ease;
}
.check-item:hover{border-color:var(--line-neon);background:var(--ink-2);transform:translateY(-3px)}
.check-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  background:var(--primary-dim);border:1px solid rgba(47,227,181,.32);
  color:var(--primary);font-size:13px;font-weight:700;font-family:var(--mono);
}
.check-item h3{font-size:16px;font-weight:700}
.check-item p{margin-top:4px;font-size:14px;color:var(--text-2)}

/* ---------- Scenario rows ---------- */
.scene-list{display:grid;gap:16px;margin-top:32px}
.scene{
  display:grid;grid-template-columns:180px minmax(0,1fr);gap:28px;
  padding:24px 26px;border-radius:14px;
  background:var(--ink-1);border:1px solid var(--line);
  border-left:3px solid rgba(47,227,181,.4);
  transition:border-left-color .2s ease,background .2s ease;
}
.scene:hover{border-left-color:var(--primary);background:var(--ink-2)}
.scene h3{font-size:17px;font-weight:700;color:var(--primary)}
.scene p{font-size:15px;color:var(--text-2)}

/* ---------- FAQ ---------- */
.faq{display:grid;gap:12px;max-width:920px}
.faq-item{
  background:var(--ink-2);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;position:relative;transition:border-color .25s ease,background .25s ease;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:var(--primary);opacity:0;transition:opacity .25s ease;
}
.faq-item:hover{border-color:rgba(255,255,255,.14)}
.faq-item.is-open{border-color:var(--line-neon);background:var(--ink-3)}
.faq-item.is-open::before{opacity:1}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 22px;background:none;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:600;color:var(--text);line-height:1.6;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--primary)}
.faq-item.is-open .faq-q{color:var(--primary)}
.faq-icon{
  flex-shrink:0;width:22px;height:22px;line-height:20px;text-align:center;
  font-size:18px;font-weight:400;color:var(--primary);
  border:1px solid rgba(47,227,181,.32);border-radius:6px;
  transition:transform .24s ease;
}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease}
.faq-item.is-open .faq-a{max-height:400px}
.faq-a p{padding:0 22px 22px;color:var(--text-2);font-size:15px;line-height:1.85}

/* ---------- CTA + form ---------- */
.cta-section{padding:0 0 96px}
.cta-box{
  border-radius:20px;padding:56px;
  border:1px solid var(--line-neon);
  background:
    radial-gradient(110% 130% at 0% 0%,rgba(47,227,181,.13),transparent 58%),
    radial-gradient(90% 120% at 100% 100%,rgba(255,180,84,.08),transparent 60%),
    var(--ink-1);
  display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start;
  box-shadow:var(--shadow-card);
}
.cta-copy h2{font-size:clamp(24px,3vw,36px);font-weight:700;line-height:1.25;letter-spacing:-.01em;margin-top:14px}
.cta-copy p{margin-top:14px;color:var(--text-2);font-size:15px}
.cta-points{display:grid;gap:12px;margin-top:26px}
.cta-points li{
  display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-2);
}
.cta-points li::before{
  content:"";flex-shrink:0;width:6px;height:6px;border-radius:50%;
  background:var(--primary);margin-top:.62em;box-shadow:0 0 10px rgba(47,227,181,.9);
}
.form-grid{display:grid;gap:16px}
.field label{display:block;font-size:13px;letter-spacing:.04em;color:var(--text-2);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:10px;
  background:#0E1116;border:1px solid var(--line);color:var(--text);
  font-size:15px;transition:border-color .2s,box-shadow .2s,background .2s;
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(47,227,181,.6);
  box-shadow:0 0 0 3px rgba(47,227,181,.18);
  background:#101519;
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field.has-error input,.field.has-error select{border-color:rgba(255,92,92,.7)}
.field-error{display:none;margin-top:6px;font-size:12px;color:#FF5C5C}
.field.has-error .field-error{display:block}
.form-note{font-size:13px;color:var(--text-3);line-height:1.7}
.form-ok{
  display:none;padding:18px 20px;border-radius:12px;
  background:rgba(47,227,181,.1);border:1px solid rgba(47,227,181,.35);
  color:var(--primary);font-size:15px;
}
.form-ok.is-visible{display:block}

/* ---------- Footer ---------- */
.site-footer{
  position:relative;background:var(--ink-0);
  padding:64px 0 0;border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;top:-1px;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--primary),transparent);
  opacity:.55;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
  padding-bottom:48px;
}
.footer-brand p{margin-top:16px;color:var(--text-2);font-size:14px;max-width:30ch}
.footer-col h4{
  font-size:13px;letter-spacing:.08em;color:var(--text-3);
  font-weight:600;margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-contact li{display:flex;justify-content:space-between;gap:16px;font-size:14px;color:var(--text-2)}
.footer-contact li span:first-child{color:var(--text-3)}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:22px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);transition:color .2s}
.footer-bottom a:hover{color:var(--primary)}

/* ---------- Responsive ---------- */
@media (max-width:1279px){
  .container{max-width:960px}
  .hero-grid{gap:40px}
  .split{gap:40px}
  .cta-box{padding:44px;gap:36px}
}
@media (max-width:1023px){
  .container{max-width:100%;padding:0 22px}
  .nav-menu{
    position:fixed;left:0;right:0;top:68px;bottom:0;margin:0;
    background:var(--ink-0);border-top:1px solid var(--line);
    padding:8px 22px 140px;overflow-y:auto;display:none;
  }
  .nav-menu.is-open{display:block}
  .nav-menu ul{flex-direction:column;align-items:stretch;gap:0}
  .nav-menu a{padding:18px 0;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-menu a.is-active::after{display:none}
  .nav-menu a.is-active{padding-left:14px;border-left:2px solid var(--primary)}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-sm{display:none}
  .section{padding:64px 0}
  .section-tight{padding:0 0 64px}
  .cta-section{padding:0 0 64px}
  .hero{padding:60px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:2}
  .split{grid-template-columns:1fr;gap:24px}
  .split-title{position:static}
  .check-list{grid-template-columns:1fr}
  .scene{grid-template-columns:1fr;gap:8px}
  .cta-box{grid-template-columns:1fr;padding:36px}
  .stage img{height:280px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  body{font-size:15px}
  .container{padding:0 20px}
  .section{padding:48px 0}
  .section-tight{padding:0 0 48px}
  .cta-section{padding:0 0 48px}
  .hero{padding:44px 0 44px}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:18px;margin-top:28px}
  .stat-num{font-size:20px}
  .point{grid-template-columns:56px minmax(0,1fr);gap:14px;padding:20px 0}
  .point .tag{display:none}
  .point-num{font-size:22px}
  .point h3{font-size:17px}
  .stage img{height:210px}
  .stage-caption{padding:20px}
  .cta-box{padding:24px 20px;border-radius:16px}
  .faq-q{font-size:16px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;gap:6px}
  .site-footer{padding-top:44px}
  .hero::before{opacity:.12}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .point:hover{padding-left:8px}
  .check-item:hover,.btn:hover{transform:none}
}

/* roulang page: category3 */
:root{
  --ink-0:#0A0B0D;
  --ink-1:#101317;
  --ink-2:#16191E;
  --ink-3:#1C2027;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --accent:#2FE3B5;
  --accent-soft:rgba(47,227,181,.12);
  --accent-line:rgba(47,227,181,.35);
  --amber:#FFB454;
  --amber-soft:rgba(255,180,84,.12);
  --text:#F2F4F7;
  --text-2:#A7AFBA;
  --text-3:#6E7683;
  --danger:#FF5C5C;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --shadow-card:0 24px 48px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --shadow-glow:0 0 32px -10px rgba(47,227,181,.30);
  --container:1200px;
  --font:system-ui,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(900px 480px at 78% -8%, rgba(47,227,181,.10), transparent 62%),
    radial-gradient(680px 380px at 6% 12%, rgba(255,180,84,.05), transparent 60%);
  z-index:0;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease;}
a:hover{color:var(--accent);}
p{margin:0 0 16px;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.22;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input,textarea{font-family:inherit;font-size:15px;color:var(--text);}
::selection{background:rgba(47,227,181,.28);color:#fff;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px;}

.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
  position:relative;
  z-index:1;
}

/* ============ 顶栏 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(10,11,13,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:28px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-mark{
  width:26px;height:26px;
  border-radius:8px;
  background:linear-gradient(140deg,var(--accent),#0f9d7d);
  box-shadow:0 0 18px -4px rgba(47,227,181,.8), inset 0 1px 0 rgba(255,255,255,.35);
  position:relative;
}
.logo-mark::after{
  content:"";
  position:absolute;
  inset:7px;
  border-radius:3px;
  border:2px solid rgba(6,17,14,.75);
  border-right-color:transparent;
  transform:rotate(38deg);
}
.logo-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:.01em;
  color:var(--text);
}
.nav-menu{flex:1;}
.nav-menu ul{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  white-space:nowrap;
}
.nav-menu a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.nav-menu a.is-active{color:var(--accent);}
.nav-menu a.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:-2px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 12px rgba(47,227,181,.9);
}
.header-cta{display:flex;align-items:center;gap:12px;flex-shrink:0;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:0 20px;
  height:44px;
  border:1px solid transparent;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  letter-spacing:.01em;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent);
  color:#06110E;
  box-shadow:0 12px 26px -16px rgba(47,227,181,.9);
}
.btn-primary:hover{
  background:#42efc4;
  color:#06110E;
  transform:translateY(-1px);
  box-shadow:0 16px 32px -14px rgba(47,227,181,.95);
}
.btn-primary:active{transform:translateY(0);background:#26cda2;}
.btn-ghost{
  background:transparent;
  border-color:rgba(47,227,181,.45);
  color:var(--accent);
}
.btn-ghost:hover{
  background:rgba(47,227,181,.10);
  border-color:var(--accent);
  color:var(--accent);
  transform:translateY(-1px);
}
.btn-plain{
  background:transparent;
  color:var(--text-2);
  padding:0 4px;
  height:auto;
}
.btn-plain:hover{color:var(--accent);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  align-items:center;justify-content:center;
  background:rgba(255,255,255,.04);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--text);
  font-size:16px;
}
.nav-toggle:hover{border-color:var(--accent-line);color:var(--accent);}

/* ============ 通用板块 ============ */
.section{padding:96px 0;position:relative;}
.section-tight{padding:72px 0;}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  margin-bottom:44px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 14px;
  border-radius:999px;
  background:var(--accent-soft);
  border:1px solid var(--accent-line);
  color:var(--accent);
  font-size:13px;
  letter-spacing:.08em;
  font-weight:600;
  margin-bottom:18px;
}
.eyebrow i{font-size:11px;}
.section-title{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;
  line-height:1.2;
}
.section-sub{
  color:var(--text-2);
  font-size:16px;
  max-width:620px;
  margin-top:14px;
}
.label-line{
  display:block;
  width:56px;height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--accent),transparent);
  margin-bottom:22px;
}

/* ============ Hero ============ */
.page-hero{
  position:relative;
  padding:76px 0 88px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  opacity:.22;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(100deg,rgba(10,11,13,.96) 30%,rgba(10,11,13,.62) 100%);
  z-index:0;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:56px;
  align-items:center;
  position:relative;
  z-index:1;
}
.hero-copy h1{
  font-size:clamp(32px,5vw,54px);
  font-weight:800;
  letter-spacing:-0.02em;
  line-height:1.12;
  margin-bottom:20px;
}
.hero-copy h1 .accent{color:var(--accent);}
.hero-lead{
  font-size:17px;
  color:var(--text-2);
  max-width:560px;
  margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:36px;}
.hero-stats{
  display:flex;
  align-items:stretch;
  gap:0;
  border-top:1px solid var(--line);
  padding-top:24px;
}
.stat{
  padding-right:26px;
  margin-right:26px;
  border-right:1px solid var(--line);
}
.stat:last-child{border-right:0;margin-right:0;padding-right:0;}
.stat-num{
  font-family:var(--mono);
  font-size:22px;
  font-weight:700;
  color:var(--accent);
  letter-spacing:-0.02em;
  display:block;
  line-height:1.3;
}
.stat-label{
  font-size:13px;
  color:var(--text-3);
  letter-spacing:.04em;
}
.hero-visual{
  position:relative;
  border-radius:var(--radius-img);
  overflow:hidden;
  border:1px solid rgba(47,227,181,.25);
  box-shadow:var(--shadow-card);
}
.hero-visual img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.hero-visual::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,transparent 40%,rgba(10,11,13,.82) 100%);
}
.hero-visual-cap{
  position:absolute;
  left:20px;right:20px;bottom:16px;
  z-index:2;
  font-size:13px;
  color:var(--text-2);
  display:flex;
  align-items:center;
  gap:8px;
}
.hero-visual-cap i{color:var(--accent);}

/* ============ 编号流程 ============ */
.flow{
  position:relative;
  margin-top:8px;
  border-left:1px solid var(--line);
  padding-left:0;
}
.flow-item{
  position:relative;
  display:grid;
  grid-template-columns:88px 1fr;
  gap:28px;
  padding:0 0 44px 32px;
}
.flow-item:last-child{padding-bottom:0;}
.flow-item::before{
  content:"";
  position:absolute;
  left:-5px;
  top:12px;
  width:9px;height:9px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(47,227,181,.14), 0 0 16px rgba(47,227,181,.9);
}
.flow-num{
  font-family:var(--mono);
  font-size:34px;
  font-weight:700;
  line-height:1;
  color:rgba(47,227,181,.55);
  letter-spacing:-0.03em;
}
.flow-body h3{
  font-size:21px;
  font-weight:700;
  margin-bottom:10px;
}
.flow-body > p{
  color:var(--text-2);
  font-size:15.5px;
  margin-bottom:14px;
  max-width:720px;
}
.flow-tips{
  display:grid;
  gap:8px;
}
.flow-tips li{
  position:relative;
  padding-left:20px;
  font-size:14.5px;
  color:var(--text-2);
}
.flow-tips li::before{
  content:"";
  position:absolute;
  left:0;top:10px;
  width:8px;height:8px;
  border-radius:2px;
  background:linear-gradient(140deg,var(--accent),rgba(47,227,181,.3));
}

/* ============ 分栏说明 ============ */
.split{
  display:grid;
  grid-template-columns:.85fr 1.15fr;
  gap:64px;
  align-items:start;
}
.split-left .section-title{margin-bottom:0;}
.split-left p{
  color:var(--text-2);
  font-size:15px;
  margin-top:16px;
}
.split-right p{
  color:var(--text-2);
  font-size:15.5px;
}
.note-card{
  margin-top:24px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:22px 24px;
  display:flex;
  gap:14px;
  align-items:flex-start;
}
.note-card i{
  color:var(--amber);
  font-size:16px;
  margin-top:4px;
}
.note-card p{
  margin:0;
  font-size:14px;
  color:var(--text-2);
}
.note-card strong{color:var(--text);font-weight:600;}

/* ============ 要点卡片网格（一大两小） ============ */
.grid-asym{
  display:grid;
  grid-template-columns:1.25fr 1fr;
  gap:24px;
}
.card{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.card:hover{
  transform:translateY(-4px);
  border-color:var(--accent-line);
  box-shadow:var(--shadow-card), var(--shadow-glow);
  background:var(--ink-3);
}
.card-pad{padding:28px;}
.card-media{
  border-radius:var(--radius-img);
  overflow:hidden;
  margin-bottom:20px;
  border:1px solid var(--line);
}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.card h3{
  font-size:19px;
  font-weight:700;
  margin-bottom:10px;
}
.card p{
  color:var(--text-2);
  font-size:14.5px;
  margin-bottom:0;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:3px 11px;
  border-radius:999px;
  font-size:12.5px;
  letter-spacing:.04em;
  font-weight:600;
  background:var(--accent-soft);
  border:1px solid var(--accent-line);
  color:var(--accent);
  margin-bottom:14px;
}
.tag-amber{
  background:var(--amber-soft);
  border-color:rgba(255,180,84,.35);
  color:var(--amber);
}
.stack{display:grid;gap:24px;}
.mini-metrics{
  display:flex;
  gap:26px;
  margin-top:18px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.mini-metrics span{
  font-family:var(--mono);
  font-size:15px;
  color:var(--accent);
  font-weight:700;
  display:block;
}
.mini-metrics small{
  font-size:12.5px;
  color:var(--text-3);
  letter-spacing:.04em;
}

/* ============ FAQ ============ */
.faq-list{display:grid;gap:12px;max-width:880px;}
.faq-item{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  transition:border-color .25s ease,background .25s ease;
}
.faq-item:hover{border-color:rgba(255,255,255,.16);}
.faq-item.is-open{
  border-color:var(--accent-line);
  background:var(--ink-3);
  box-shadow:inset 3px 0 0 0 var(--accent);
}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:18px 22px;
  background:transparent;
  border:0;
  color:var(--text);
  font-size:17px;
  font-weight:600;
  text-align:left;
  line-height:1.5;
}
.faq-q .icon{
  flex-shrink:0;
  width:22px;height:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  color:var(--accent);
  font-size:13px;
  transition:transform .24s ease;
}
.faq-item.is-open .faq-q .icon{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a p{
  padding:0 22px 20px;
  margin:0;
  color:var(--text-2);
  font-size:15px;
  line-height:1.8;
  max-width:760px;
}

/* ============ CTA 与表单 ============ */
.cta-wrap{
  position:relative;
  border-radius:20px;
  padding:2px;
  background:linear-gradient(130deg,rgba(47,227,181,.55),rgba(255,180,84,.30) 55%,rgba(47,227,181,.12));
}
.cta-inner{
  background:linear-gradient(160deg,#0E1116 0%,#101317 100%);
  border-radius:18px;
  padding:56px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:start;
}
.cta-inner h2{
  font-size:clamp(26px,3.2vw,38px);
  font-weight:800;
  line-height:1.2;
  margin-bottom:16px;
}
.cta-inner h2 .accent{color:var(--accent);}
.cta-inner .cta-copy{color:var(--text-2);font-size:15.5px;margin-bottom:24px;}
.cta-points{display:grid;gap:12px;}
.cta-points li{
  display:flex;
  gap:10px;
  align-items:flex-start;
  font-size:14.5px;
  color:var(--text-2);
}
.cta-points i{color:var(--accent);margin-top:5px;font-size:13px;}
.lead-form{display:grid;gap:16px;}
.field{display:grid;gap:8px;}
.field label{
  font-size:13px;
  letter-spacing:.06em;
  color:var(--text-3);
}
.field input,.field textarea{
  width:100%;
  min-height:48px;
  padding:12px 14px;
  background:#0E1116;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{resize:vertical;min-height:104px;line-height:1.7;}
.field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
.field input:focus,.field textarea:focus{
  outline:none;
  border-color:rgba(47,227,181,.6);
  box-shadow:0 0 0 3px rgba(47,227,181,.18);
  background:#0F1319;
}
.field.has-error input,.field.has-error textarea{
  border-color:rgba(255,92,92,.7);
  box-shadow:0 0 0 3px rgba(255,92,92,.14);
}
.field-error{
  display:none;
  font-size:12px;
  color:var(--danger);
}
.field.has-error .field-error{display:block;}
.form-submit{height:50px;width:100%;font-size:16px;}
.form-note{
  font-size:12.5px;
  color:var(--text-3);
  line-height:1.7;
  margin:0;
}
.form-success{
  display:none;
  align-items:center;
  gap:10px;
  padding:18px 20px;
  border-radius:12px;
  background:var(--accent-soft);
  border:1px solid var(--accent-line);
  color:var(--accent);
  font-size:15px;
  font-weight:600;
}
.form-success.is-visible{display:flex;}

/* ============ 页脚 ============ */
.site-footer{
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  position:relative;
  background:var(--ink-1);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.75),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.3fr;
  gap:40px;
  padding-bottom:44px;
}
.footer-brand p{
  color:var(--text-2);
  font-size:14px;
  margin-top:16px;
  max-width:320px;
}
.footer-col h4{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-3);
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14px;color:var(--text-2);}
.footer-col a:hover{color:var(--accent);}
.footer-contact li{
  display:flex;
  justify-content:space-between;
  gap:12px;
  font-size:13.5px;
  color:var(--text-2);
}
.footer-contact li span:first-child{color:var(--text-3);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding-top:22px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  justify-content:space-between;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);}
.footer-bottom a:hover{color:var(--accent);}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .container{max-width:960px;}
}
@media (max-width:1024px){
  .section{padding:64px 0;}
  .section-tight{padding:56px 0;}
  .header-inner{height:64px;gap:16px;}
  .nav-toggle{display:inline-flex;}
  .header-cta .btn-primary{display:none;}
  .nav-menu{
    position:fixed;
    top:64px;left:0;right:0;bottom:0;
    background:rgba(10,11,13,.985);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    padding:12px 20px 40px;
    overflow-y:auto;
    opacity:0;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .24s ease,transform .24s ease;
    border-top:1px solid var(--line);
  }
  body.nav-open .nav-menu{opacity:1;transform:none;pointer-events:auto;}
  .nav-menu ul{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu li + li{border-top:1px solid var(--line);}
  .nav-menu a{display:block;padding:16px 4px;font-size:16px;border-radius:0;}
  .nav-menu a:hover{background:transparent;}
  .nav-menu a.is-active::after{left:0;right:auto;width:28px;bottom:10px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-visual{max-width:560px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .grid-asym{grid-template-columns:1fr;}
  .cta-inner{grid-template-columns:1fr;gap:36px;padding:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .flow-item{grid-template-columns:64px 1fr;gap:20px;padding-left:24px;}
  .flow-num{font-size:28px;}
}
@media (max-width:640px){
  .container{padding:0 20px;}
  .section{padding:48px 0;}
  .section-tight{padding:44px 0;}
  .page-hero{padding:52px 0 56px;}
  .hero-copy h1{font-size:clamp(28px,8vw,36px);}
  .hero-lead{font-size:15.5px;}
  .hero-actions .btn{width:100%;}
  .hero-stats{flex-wrap:wrap;gap:18px 0;}
  .stat{padding-right:18px;margin-right:18px;}
  .stat-num{font-size:19px;}
  .section-head{flex-direction:column;align-items:flex-start;gap:14px;margin-bottom:30px;}
  .flow-item{grid-template-columns:1fr;gap:8px;padding-left:20px;padding-bottom:34px;}
  .flow-num{font-size:24px;}
  .flow-body h3{font-size:18px;}
  .card-pad{padding:20px;}
  .cta-inner{padding:26px 20px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .faq-q{font-size:15.5px;padding:16px 18px;}
  .faq-a p{padding:0 18px 18px;font-size:14.5px;}
  .site-footer{padding:48px 0 24px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .card:hover,.btn-primary:hover,.btn-ghost:hover{transform:none;}
}

/* roulang page: category4 */
:root{
  --ink-0:#0A0B0D;
  --ink-1:#101317;
  --ink-2:#16191E;
  --ink-3:#1C2027;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --accent:#2FE3B5;
  --accent-soft:rgba(47,227,181,.12);
  --accent-border:rgba(47,227,181,.35);
  --amber:#FFB454;
  --amber-soft:rgba(255,180,84,.12);
  --danger:#FF5C5C;
  --text:#F2F4F7;
  --text-2:#A7AFBA;
  --text-3:#6E7683;
  --on-accent:#06110E;
  --radius-card:16px;
  --radius-img:12px;
  --radius-btn:10px;
  --radius-pill:999px;
  --shadow-card:0 24px 48px -24px rgba(0,0,0,.85), inset 0 1px 0 rgba(255,255,255,.05);
  --shadow-glow:0 0 32px -10px rgba(47,227,181,.30);
  --container:1200px;
  --gap:24px;
  --section:96px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-0);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-img)}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--accent);
  outline-offset:3px;
  border-radius:6px;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button,input,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.section{padding:var(--section) 0}
.section-alt{background:var(--ink-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  border-radius:var(--radius-pill);
  background:var(--accent-soft);
  border:1px solid var(--accent-border);
  color:var(--accent);
  font-size:13px;
  letter-spacing:.08em;
  line-height:1.6;
}
.eyebrow::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent);
}
.section-head{max-width:720px;margin-bottom:44px}
.section-head h2{
  font-size:clamp(26px,3.4vw,40px);
  font-weight:700;
  line-height:1.2;
  letter-spacing:-.01em;
  margin-top:18px;
}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16px;max-width:640px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(10,11,13,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  height:68px;
}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--accent),#0f8f74);
  box-shadow:0 0 18px -4px rgba(47,227,181,.7);
  position:relative;
}
.logo-mark::after{
  content:"";
  position:absolute;inset:6px;
  border:1.5px solid rgba(6,17,14,.75);
  border-radius:3px;
}
.logo-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  color:var(--text);
}
.nav-menu ul{display:flex;align-items:center;gap:6px}
.nav-menu a{
  position:relative;
  display:inline-block;
  padding:10px 14px;
  font-size:15px;
  color:var(--text-2);
  border-radius:8px;
  transition:color .2s ease,background .2s ease;
}
.nav-menu a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.nav-menu a.is-active{color:var(--accent)}
.nav-menu a.is-active::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  box-shadow:0 0 12px var(--accent);
}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--line-strong);
  border-radius:10px;
  padding:0;
  align-items:center;
  justify-content:center;
  flex-direction:column;
  gap:5px;
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:var(--text-2);
  border-radius:2px;
  transition:transform .24s ease,opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 24px;
  border-radius:var(--radius-btn);
  font-size:15px;
  font-weight:700;
  line-height:1.4;
  transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--accent);
  color:var(--on-accent);
  box-shadow:0 12px 28px -16px rgba(47,227,181,.7);
}
.btn-primary:hover{transform:translateY(-1px);background:#4ceec2;box-shadow:0 16px 32px -14px rgba(47,227,181,.75)}
.btn-primary:active{transform:translateY(0);background:#27cda3}
.btn-primary[disabled]{opacity:.5;cursor:not-allowed;transform:none}
.btn-ghost{
  background:transparent;
  border:1px solid rgba(47,227,181,.45);
  color:var(--accent);
}
.btn-ghost:hover{transform:translateY(-1px);background:rgba(47,227,181,.10);border-color:var(--accent)}
.btn-ghost:active{transform:translateY(0)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.btn-line{
  padding:0;
  color:var(--text-2);
  font-weight:600;
  font-size:15px;
  display:inline-flex;align-items:center;gap:6px;
  border-radius:0;
}
.btn-line::after{
  content:"";
  display:block;
  position:absolute;
}

/* ============ 分类页头 ============ */
.cat-hero{
  position:relative;
  padding:72px 0 84px;
  background:
    radial-gradient(900px 420px at 78% -10%, rgba(47,227,181,.13), transparent 62%),
    radial-gradient(600px 320px at 8% 110%, rgba(255,180,84,.07), transparent 65%),
    var(--ink-0);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.cat-hero::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.55),transparent);
}
.cat-hero-grid{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:48px;
  align-items:center;
}
.cat-hero h1{
  font-size:clamp(32px,4.6vw,54px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
  margin-top:20px;
}
.cat-hero h1 em{
  font-style:normal;
  color:var(--accent);
  display:block;
  font-size:clamp(22px,2.6vw,32px);
  font-weight:700;
  letter-spacing:0;
  margin-top:12px;
}
.cat-hero-lead{
  margin-top:22px;
  color:var(--text-2);
  font-size:17px;
  max-width:560px;
}
.cat-hero-lead + .cat-hero-lead{margin-top:10px}
.cat-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.cat-hero-figure{
  position:relative;
  border-radius:var(--radius-card);
  overflow:hidden;
  border:1px solid rgba(47,227,181,.25);
  box-shadow:var(--shadow-card);
}
.cat-hero-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;border-radius:0}
.cat-hero-figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,.10) 0%,rgba(10,11,13,.72) 100%);
}
.cat-hero-caption{
  position:absolute;
  left:20px;right:20px;bottom:18px;
  z-index:2;
  font-size:13px;
  color:rgba(242,244,247,.86);
  letter-spacing:.04em;
  display:flex;align-items:center;gap:8px;
}
.cat-hero-caption::before{
  content:"";
  width:26px;height:1px;
  background:var(--accent);
  box-shadow:0 0 10px var(--accent);
}
.crumbs{
  display:flex;align-items:center;gap:10px;
  font-size:13px;color:var(--text-3);
  margin-bottom:8px;
  flex-wrap:wrap;
}
.crumbs a{color:var(--text-3);transition:color .2s ease}
.crumbs a:hover{color:var(--accent)}
.crumbs span[aria-current]{color:var(--text-2)}

/* ============ 一大两小图文网格 ============ */
.feature-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  grid-template-rows:auto auto;
  gap:var(--gap);
}
.feature-main{
  grid-row:1 / span 2;
  display:flex;
  flex-direction:column;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:border-color .25s ease,transform .25s ease,box-shadow .25s ease;
}
.feature-main:hover{border-color:rgba(47,227,181,.45);transform:translateY(-4px);box-shadow:var(--shadow-card),var(--shadow-glow)}
.feature-main figure{margin:0;position:relative;overflow:hidden}
.feature-main img{aspect-ratio:16/10;object-fit:cover;border-radius:0;width:100%}
.feature-main figure::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,11,13,0) 45%,rgba(10,11,13,.85) 100%);
}
.feature-main .badge{
  position:absolute;
  left:18px;top:18px;
  z-index:2;
}
.feature-main-body{padding:26px 26px 28px;display:flex;flex-direction:column;gap:14px;flex:1}
.feature-main-body h3{font-size:22px;font-weight:700;line-height:1.35}
.feature-main-body p{color:var(--text-2);font-size:15px}
.feature-stats{display:flex;gap:28px;margin-top:auto;padding-top:18px;border-top:1px solid var(--line)}
.feature-stats div{display:flex;flex-direction:column;gap:2px}
.feature-stats strong{font-family:var(--mono);font-size:20px;color:var(--accent);font-weight:600;line-height:1.3}
.feature-stats span{font-size:12px;color:var(--text-3);letter-spacing:.06em}
.feature-side{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:12px;
  box-shadow:var(--shadow-card);
  transition:border-color .25s ease,transform .25s ease,background .25s ease,box-shadow .25s ease;
}
.feature-side:hover{border-color:rgba(47,227,181,.45);transform:translateY(-4px);background:var(--ink-3);box-shadow:var(--shadow-card),var(--shadow-glow)}
.feature-side h3{font-size:19px;font-weight:700;line-height:1.4}
.feature-side p{color:var(--text-2);font-size:14px}
.badge{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  padding:4px 12px;
  border-radius:var(--radius-pill);
  font-size:12px;
  letter-spacing:.06em;
  line-height:1.7;
  background:var(--accent-soft);
  color:var(--accent);
  border:1px solid var(--accent-border);
}
.badge-amber{background:var(--amber-soft);color:var(--amber);border-color:rgba(255,180,84,.32)}
.badge-muted{background:rgba(255,255,255,.05);color:var(--text-2);border-color:var(--line-strong)}

/* ============ 两栏说明 ============ */
.split{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,7fr);
  gap:56px;
  align-items:start;
}
.split-title h2{
  font-size:clamp(26px,3.4vw,38px);
  font-weight:700;
  line-height:1.22;
  letter-spacing:-.01em;
  margin-top:18px;
}
.split-title p{margin-top:16px;color:var(--text-2);font-size:15px}
.split-body p{color:var(--text-2);font-size:16px;line-height:1.85}
.split-body p + p{margin-top:16px}
.split-body strong{color:var(--text);font-weight:700}
.rule-list{margin-top:28px;display:flex;flex-direction:column;gap:14px}
.rule-item{
  display:grid;
  grid-template-columns:44px minmax(0,1fr);
  gap:16px;
  padding:18px 20px;
  background:var(--ink-2);
  border:1px solid var(--line);
  border-left:3px solid rgba(47,227,181,.4);
  border-radius:12px;
  transition:border-color .22s ease,background .22s ease,transform .22s ease;
}
.rule-item:hover{border-left-color:var(--accent);background:var(--ink-3);transform:translateX(2px)}
.rule-item .num{
  font-family:var(--mono);
  font-size:18px;
  font-weight:600;
  color:var(--accent);
  line-height:1.6;
}
.rule-item h4{font-size:16px;font-weight:700;line-height:1.5}
.rule-item p{font-size:14px;color:var(--text-2);margin-top:4px}

/* ============ 编号流程 ============ */
.flow{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:var(--gap);
  position:relative;
}
.flow::before{
  content:"";
  position:absolute;
  top:26px;left:6%;right:6%;
  height:1px;
  background:repeating-linear-gradient(90deg,rgba(47,227,181,.45) 0 6px,transparent 6px 14px);
}
.flow-step{position:relative;padding-top:0}
.flow-num{
  width:52px;height:52px;
  display:flex;align-items:center;justify-content:center;
  border-radius:50%;
  background:var(--ink-0);
  border:1px solid var(--accent-border);
  color:var(--accent);
  font-family:var(--mono);
  font-size:16px;
  font-weight:600;
  box-shadow:0 0 18px -6px rgba(47,227,181,.6);
  position:relative;
  z-index:2;
}
.flow-step h3{font-size:18px;font-weight:700;margin-top:20px}
.flow-step p{font-size:14px;color:var(--text-2);margin-top:8px}

/* ============ FAQ ============ */
.faq{max-width:880px;margin:0 auto}
.faq-item{
  background:var(--ink-2);
  border:1px solid var(--line);
  border-radius:12px;
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color .24s ease,background .24s ease;
}
.faq-item:hover{border-color:var(--line-strong)}
.faq-item.is-open{border-color:rgba(47,227,181,.4);background:var(--ink-3)}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  padding:20px 22px;
  text-align:left;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  position:relative;
  transition:color .2s ease;
}
.faq-item.is-open .faq-q{color:var(--accent)}
.faq-q .sign{
  flex-shrink:0;
  width:22px;height:22px;
  position:relative;
  transition:transform .24s ease;
}
.faq-q .sign::before,
.faq-q .sign::after{
  content:"";
  position:absolute;
  background:currentColor;
  border-radius:2px;
  opacity:.85;
}
.faq-q .sign::before{left:0;right:0;top:10px;height:2px}
.faq-q .sign::after{top:0;bottom:0;left:10px;width:2px;transition:opacity .2s ease}
.faq-item.is-open .sign{transform:rotate(45deg)}
.faq-item.is-open .sign::after{opacity:0}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .24s ease;
}
.faq-a-inner{
  padding:0 22px 22px 22px;
  color:var(--text-2);
  font-size:15px;
  line-height:1.85;
  border-left:3px solid var(--accent);
  margin-left:0;
}

/* ============ CTA ============ */
.cta-wrap{
  position:relative;
  border-radius:20px;
  padding:2px;
  background:linear-gradient(120deg,rgba(47,227,181,.65),rgba(255,180,84,.45),rgba(47,227,181,.25));
  box-shadow:0 30px 70px -40px rgba(47,227,181,.5);
}
.cta-inner{
  background:var(--ink-1);
  border-radius:18px;
  padding:48px;
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,0.86fr);
  gap:48px;
  align-items:start;
}
.cta-copy h2{
  font-size:clamp(26px,3.2vw,36px);
  font-weight:700;
  line-height:1.24;
  letter-spacing:-.01em;
  margin-top:16px;
}
.cta-copy p{color:var(--text-2);margin-top:14px;font-size:15px}
.cta-points{margin-top:24px;display:flex;flex-direction:column;gap:10px}
.cta-points li{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;color:var(--text-2);
}
.cta-points li::before{
  content:"";
  flex-shrink:0;
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  margin-top:10px;
  box-shadow:0 0 10px rgba(47,227,181,.8);
}
.form-field{margin-bottom:16px}
.form-field label{
  display:block;
  font-size:13px;
  color:var(--text-2);
  letter-spacing:.04em;
  margin-bottom:8px;
}
.form-field input,
.form-field textarea{
  width:100%;
  background:#0E1116;
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  padding:0 16px;
  height:48px;
  font-size:15px;
  color:var(--text);
  transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.form-field textarea{height:auto;padding:14px 16px;resize:vertical;min-height:96px;line-height:1.7}
.form-field input::placeholder,
.form-field textarea::placeholder{color:var(--text-3)}
.form-field input:hover,
.form-field textarea:hover{border-color:var(--line-strong)}
.form-field input:focus,
.form-field textarea:focus{
  outline:none;
  border-color:rgba(47,227,181,.6);
  box-shadow:0 0 0 3px rgba(47,227,181,.18);
  background:#0C1015;
}
.form-note{font-size:12px;color:var(--text-3);margin-top:12px;line-height:1.7}
.form-success{
  display:none;
  padding:14px 16px;
  border-radius:var(--radius-btn);
  border:1px solid rgba(47,227,181,.4);
  background:rgba(47,227,181,.10);
  color:var(--accent);
  font-size:14px;
  margin-top:12px;
}
.form-success.is-visible{display:block}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  background:var(--ink-0);
  border-top:1px solid var(--line);
  padding:64px 0 28px;
  margin-top:0;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(47,227,181,.6),transparent);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid var(--line);
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:var(--text-2);font-size:14px;line-height:1.8;max-width:300px}
.footer-col h4{
  font-size:13px;
  letter-spacing:.08em;
  color:var(--text-2);
  font-weight:600;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2);transition:color .2s ease}
.footer-col a:hover{color:var(--accent)}
.footer-contact li{
  display:flex;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--text-3);
}
.footer-contact li span:last-child{color:var(--text-2);text-align:right}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:24px;
  font-size:13px;
  color:var(--text-3);
}
.footer-bottom a{color:var(--text-2);transition:color .2s ease}
.footer-bottom a:hover{color:var(--accent)}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  :root{--container:960px}
  .cat-hero-grid{gap:36px}
  .split{gap:40px}
}
@media (max-width:1023px){
  :root{--section:64px}
  .nav-toggle{display:flex}
  .nav-menu{
    position:fixed;
    top:68px;left:0;right:0;bottom:0;
    background:rgba(10,11,13,.98);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    padding:12px 20px 32px;
    transform:translateY(-8px);
    opacity:0;
    visibility:hidden;
    transition:opacity .22s ease,transform .22s ease,visibility .22s;
    overflow-y:auto;
  }
  .nav-menu.is-open{opacity:1;visibility:visible;transform:translateY(0)}
  .nav-menu ul{flex-direction:column;align-items:stretch;gap:0}
  .nav-menu li + li{border-top:1px solid var(--line)}
  .nav-menu a{padding:16px 4px;font-size:16px;border-radius:0}
  .nav-menu a.is-active::after{left:0;right:auto;width:22px;bottom:10px}
  .cat-hero{padding:52px 0 60px}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px}
  .cat-hero-figure{max-width:560px}
  .feature-grid{grid-template-columns:1fr;grid-template-rows:auto}
  .feature-main{grid-row:auto}
  .split{grid-template-columns:1fr;gap:28px}
  .flow{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .flow::before{display:none}
  .cta-inner{grid-template-columns:1fr;padding:36px;gap:32px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:639px){
  :root{--section:48px;--gap:16px}
  .container{padding:0 20px}
  .header-inner{height:64px;gap:12px}
  .nav-menu{top:64px}
  .logo-text{font-size:16px}
  .cat-hero{padding:40px 0 48px}
  .cat-hero h1{font-size:30px}
  .cat-hero h1 em{font-size:21px}
  .cat-hero-lead{font-size:15px}
  .cat-hero-actions .btn{width:100%}
  .feature-main-body{padding:20px}
  .feature-side{padding:20px}
  .feature-stats{gap:20px}
  .flow{grid-template-columns:1fr;gap:22px}
  .flow-num{width:46px;height:46px;font-size:15px}
  .faq-q{padding:16px 18px;font-size:16px}
  .faq-a-inner{padding:0 18px 18px 18px;font-size:14px}
  .cta-inner{padding:24px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .footer-brand p{max-width:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .feature-main:hover,.feature-side:hover,.rule-item:hover,.btn:hover{transform:none !important}
}