/* roulang page: index */
:root{
  --bg:#F6F5F1;--surface:#FFFFFF;--ink:#16181A;--muted:#6B7178;--line:#E7E5E0;
  --accent:#00C2A8;--accent-weak:#E4F7F3;--accent-alt:#E2B963;
  --dark:#101213;--dark-soft:#1B1F22;--success:#2FA36B;--warning:#D98E32;--error:#C74444;
  --radius:10px;--radius-img:12px;
  --shadow:0 1px 2px rgba(16,18,20,.04),0 8px 24px rgba(16,18,20,.06);
  --shadow-hover:0 2px 4px rgba(16,18,20,.08),0 12px 32px rgba(16,18,20,.10);
  --container:1280px;--space-lg:96px;--space-md:56px;--space-sm:40px;
  --font-body:'PingFang SC','Microsoft YaHei','Noto Sans SC',Arial,sans-serif;
  --font-num:'Inter','DIN Alternate',Roboto,sans-serif;
  --transition:all .25s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-body);font-size:16px;line-height:1.8;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:var(--transition)}
button{border:none;background:none;cursor:pointer;font-family:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--space-lg) 0}
.section-sm{padding:var(--space-md) 0}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:16px}
.eyebrow-light{color:var(--accent)}
h1,h2,h3,h4{font-weight:700;letter-spacing:-.02em;line-height:1.15}
h1{font-size:72px}
h2{font-size:40px;margin-bottom:16px}
h3{font-size:24px}
h4{font-size:18px}
.section-head{max-width:680px;margin-bottom:48px}
.section-head p{color:var(--muted);font-size:17px;margin-top:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 32px;border-radius:8px;font-size:15px;font-weight:500;line-height:1.2;transition:var(--transition);white-space:nowrap}
.btn-primary{background:var(--accent);color:#05211D}
.btn-primary:hover{background:#009A85;transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,194,168,.25)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border:1px solid var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-ghost-light{border:1px solid rgba(255,255,255,.6);color:#fff;background:transparent}
.btn-ghost-light:hover{background:rgba(255,255,255,.1);transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:14px}
.btn-dark{background:var(--dark);color:#fff}
.btn-dark:hover{background:var(--dark-soft);transform:translateY(-2px)}
/* topbar */
.topbar{background:var(--dark);height:36px;display:flex;align-items:center;font-size:13px;color:rgba(255,255,255,.7)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px}
.topbar-domain{font-family:var(--font-num);letter-spacing:.02em}
.topbar-slogan{flex:1;text-align:center;font-size:13px;color:rgba(255,255,255,.55)}
.topbar-action{color:rgba(255,255,255,.85);border-bottom:1px solid rgba(255,255,255,.25);padding-bottom:2px}
.topbar-action:hover{color:var(--accent);border-color:var(--accent)}
/* navbar */
.navbar{position:sticky;top:0;z-index:100;background:var(--surface);border-bottom:1px solid var(--line);height:72px;display:flex;align-items:center;transition:height .25s ease,box-shadow .25s ease,background .25s ease}
.navbar.scrolled{height:64px;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:0 1px 2px rgba(16,18,20,.04)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-logo{width:32px;height:32px;display:flex;align-items:center;justify-content:center;background:var(--accent);border-radius:8px;color:#05211D;font-weight:800;font-size:18px}
.brand-text{font-size:20px;font-weight:700;letter-spacing:-.01em}
.nav-menu{display:flex;align-items:center;gap:32px;margin-left:48px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--muted);padding:8px 0}
.nav-link::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--accent);transition:width .25s ease}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{width:100%}
.nav-link.active{color:var(--ink)}
.nav-link.active::after{width:100%}
.nav-actions{display:flex;align-items:center;gap:16px;margin-left:auto}
.hamburger{display:none;width:40px;height:40px;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:transparent}
.hamburger span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:var(--transition)}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* drawer */
.mobile-drawer{position:fixed;top:0;left:0;right:0;bottom:0;background:var(--bg);z-index:200;display:flex;flex-direction:column;padding:32px 24px;transform:translateX(100%);transition:transform .35s ease;visibility:hidden}
.mobile-drawer.open{transform:translateX(0);visibility:visible}
.drawer-close{align-self:flex-end;font-size:28px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:8px;color:var(--ink)}
.drawer-menu{display:flex;flex-direction:column;gap:8px;margin-top:24px}
.drawer-link{font-size:28px;font-weight:600;padding:12px 0;border-bottom:1px solid var(--line)}
.drawer-link:hover{color:var(--accent)}
.drawer-cta{margin-top:32px}
/* hero */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;background-size:cover;background-position:center;background-image:url('/assets/images/backpic/back-1.png')}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(110deg,rgba(16,18,20,.88) 0%,rgba(16,18,20,.60) 50%,rgba(16,18,20,.30) 100%)}
.hero-inner{position:relative;z-index:2;max-width:60%;padding:120px 0 80px}
.hero h1{color:#fff;font-size:72px;margin-bottom:24px}
.hero-sub{color:rgba(255,255,255,.85);font-size:20px;line-height:1.7;max-width:560px;margin-bottom:40px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.scroll-down{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);z-index:2;width:40px;height:40px;display:flex;align-items:center;justify-content:center;color:#fff;border:1px solid rgba(255,255,255,.4);border-radius:50%;font-size:18px;transition:var(--transition);animation:bounce 2s infinite}
.scroll-down:hover{background:rgba(255,255,255,.1);border-color:#fff}
@keyframes bounce{0%,20%,50%,80%,100%{transform:translateX(-50%) translateY(0)}40%{transform:translateX(-50%) translateY(-6px)}60%{transform:translateX(-50%) translateY(-3px)}}
/* features */
.features{background:var(--bg)}
.features-grid{display:grid;grid-template-columns:1fr 1px 1fr 1px 1fr;gap:0}
.feature-col{padding:32px 28px}
.feature-col:first-child{padding-left:0}
.feature-col:last-child{padding-right:0}
.feature-divider{background:var(--line)}
.feature-num{font-family:var(--font-num);font-size:48px;font-weight:700;color:var(--accent);line-height:1;letter-spacing:-.02em}
.feature-line{width:40px;height:1px;background:var(--line);margin:20px 0 24px}
.feature-icon{width:40px;height:40px;border-radius:8px;background:var(--accent-weak);display:flex;align-items:center;justify-content:center;margin-bottom:20px;color:var(--accent)}
.feature-col h3{font-size:20px;margin-bottom:12px}
.feature-col p{color:var(--muted);font-size:15px;line-height:1.7}
/* demo */
.demo{background:var(--surface)}
.demo-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;margin-bottom:96px}
.demo-row:last-child{margin-bottom:0}
.demo-row.reverse .demo-image{order:2}
.demo-image{position:relative;border-radius:var(--radius-img);overflow:hidden;box-shadow:var(--shadow)}
.demo-image img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10}
.demo-play{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:64px;height:64px;border-radius:50%;background:rgba(255,255,255,.9);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);transition:var(--transition)}
.demo-play:hover{transform:translate(-50%,-50%) scale(1.05);background:#fff}
.demo-play svg{width:20px;height:20px;fill:var(--ink);margin-left:3px}
.demo-text h2{margin-bottom:16px}
.demo-text>p{color:var(--muted);margin-bottom:24px}
.demo-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.demo-list li{display:flex;align-items:flex-start;gap:12px;font-size:15px;color:var(--ink)}
.demo-list li svg{width:20px;height:20px;flex-shrink:0;color:var(--accent);margin-top:2px}
/* evidence */
.evidence{background:var(--bg)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:64px}
.metric{text-align:center;padding:24px}
.metric-value{font-family:var(--font-num);font-size:56px;font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:-.02em}
.metric-label{color:var(--muted);font-size:14px;margin-top:8px}
.evidence-quote{max-width:720px;margin:0 auto;text-align:center;padding:40px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.evidence-quote blockquote{font-size:19px;line-height:1.8;color:var(--ink);font-style:normal}
.evidence-quote cite{display:block;margin-top:16px;font-size:14px;color:var(--muted);font-style:normal}
/* price */
.price-section{background:var(--surface)}
.price-grid{display:grid;grid-template-columns:1fr 1.2fr 1fr;gap:24px;align-items:stretch}
.price-card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:36px 32px;display:flex;flex-direction:column;transition:var(--transition)}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.price-card.recommended{background:var(--accent-weak);border-color:var(--accent);position:relative}
.price-card.recommended::before{content:'推荐';position:absolute;top:-12px;right:24px;background:var(--accent-alt);color:#1d1400;font-size:12px;font-weight:600;padding:4px 14px;border-radius:999px;letter-spacing:.06em}
.price-name{font-size:18px;font-weight:600;margin-bottom:4px}
.price-desc{color:var(--muted);font-size:13px;margin-bottom:24px}
.price-value{font-family:var(--font-num);font-size:32px;font-weight:700;margin-bottom:24px}
.price-features{list-style:none;display:flex;flex-direction:column;gap:12px;margin-bottom:32px;flex:1}
.price-features li{display:flex;align-items:flex-start;gap:8px;font-size:14px;color:var(--ink)}
.price-features li svg{flex-shrink:0;width:18px;height:18px;color:var(--accent);margin-top:3px}
.price-features li.alt svg{color:var(--accent-alt)}
.price-card .btn{width:100%}
/* news */
.news-section{background:var(--bg)}
.news-layout{display:grid;grid-template-columns:1fr 1.6fr;gap:48px}
.news-aside .section-head{margin-bottom:0}
.news-list{display:flex;flex-direction:column;gap:0}
.news-item{padding:24px 0;border-bottom:1px solid var(--line);transition:var(--transition)}
.news-item:first-child{padding-top:0}
.news-item:hover{padding-left:8px}
.news-meta{display:flex;align-items:center;gap:12px;margin-bottom:8px}
.news-cat{font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-weak);padding:3px 12px;border-radius:999px}
.news-date{font-family:var(--font-num);font-size:13px;color:var(--muted)}
.news-item h3{font-size:18px;margin-bottom:6px}
.news-item h3 a:hover{color:var(--accent)}
.news-item p{font-size:14px;color:var(--muted);line-height:1.7;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-link{font-size:13px;color:var(--ink);font-weight:500}
.news-link span{display:inline-block;transition:transform .25s ease}
.news-link:hover{color:var(--accent)}
.news-link:hover span{transform:translateX(4px)}
.news-empty{border:1px dashed var(--line);border-radius:var(--radius);padding:64px;text-align:center;color:var(--muted);font-size:15px}
/* faq */
.faq-section{background:var(--surface)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);margin-bottom:12px;transition:var(--transition);background:var(--bg)}
.faq-item.open{background:var(--surface);box-shadow:var(--shadow);border-color:var(--line)}
.faq-item.open .faq-q{border-left:2px solid var(--accent)}
.faq-q{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;cursor:pointer;font-size:16px;font-weight:500;border-left:2px solid transparent;transition:var(--transition);gap:16px;min-height:56px}
.faq-q:hover{color:var(--accent)}
.faq-icon{width:24px;height:24px;flex-shrink:0;position:relative;}
.faq-icon::before{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:14px;height:2px;background:currentColor;border-radius:1px}
.faq-icon::after{content:'';position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:2px;height:14px;background:currentColor;border-radius:1px;transition:transform .25s ease}
.faq-item.open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{display:none;padding:0 24px 20px 26px;color:var(--muted);line-height:1.8;font-size:15px}
.faq-item.open .faq-a{display:block}
/* cta */
.cta-section{background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;position:relative}
.cta-section .cta-overlay{position:absolute;inset:0;background:rgba(16,18,20,.82)}
.cta-inner{position:relative;z-index:2;text-align:center;padding:100px 0;display:flex;flex-direction:column;align-items:center}
.cta-inner h2{color:#fff;font-size:40px;margin-bottom:12px}
.cta-inner p{color:rgba(255,255,255,.7);margin-bottom:40px;font-size:17px}
/* footer */
.footer{background:var(--dark);color:rgba(255,255,255,.7)}
.footer-main{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:48px;padding:72px 0 48px}
.footer-brand-desc{font-size:14px;line-height:1.7;color:rgba(255,255,255,.55);margin-top:20px;max-width:280px}
.footer-title{font-size:16px;font-weight:600;color:#fff;margin-bottom:20px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.6);transition:var(--transition)}
.footer-links a:hover{color:var(--accent)}
.footer-contact{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-contact li{display:flex;gap:8px;align-items:flex-start;color:rgba(255,255,255,.6)}
.footer-contact svg{flex-shrink:0;width:16px;height:16px;margin-top:4px;color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:24px 0;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.4)}
/* float cta */
.float-cta{position:fixed;bottom:24px;right:24px;z-index:150;background:var(--accent);color:#05211D!important;padding:14px 28px;border-radius:999px;font-size:14px;font-weight:600;box-shadow:0 4px 16px rgba(0,194,168,.3);transition:var(--transition)}
.float-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,194,168,.4)}
/* reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
/* placeholder */
.placeholder-img{background:var(--line);display:flex;align-items:center;justify-content:center;width:100%;height:100%;color:var(--muted);font-size:14px}
/* responsive */
@media(max-width:1280px){
  .hero-inner{max-width:70%}
}
@media(max-width:1024px){
  h1{font-size:56px}
  h2{font-size:32px}
  .features-grid{grid-template-columns:1fr 1px 1fr;grid-template-rows:auto 1px auto}
  .feature-divider.vertical:nth-child(2){display:none}
  .feature-divider.horizontal{grid-column:1/-1;height:1px;background:var(--line)}
  .demo-row{grid-template-columns:1fr;gap:32px}
  .demo-row.reverse .demo-image{order:0}
  .price-grid{grid-template-columns:1fr 1fr}
  .price-grid .price-card.recommended{grid-column:1/-1;order:-1}
  .news-layout{grid-template-columns:1fr;gap:24px}
  .metrics-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .nav-menu{display:none}
  .nav-actions .btn{display:none}
  .hamburger{display:flex}
  .section{padding:var(--space-sm) 0}
  h1{font-size:44px}
  h2{font-size:26px}
  .topbar-slogan{display:none}
  .hero-inner{max-width:100%;padding:100px 0 60px}
  .brand-text{font-size:18px}
  .features-grid{grid-template-columns:1fr}
  .feature-col{padding:24px 0}
  .feature-col:first-child,.feature-col:last-child{padding-left:0;padding-right:0}
  .feature-divider{display:none}
  .demo-row{margin-bottom:56px;gap:24px}
  .price-grid{grid-template-columns:1fr}
  .price-grid .price-card.recommended{grid-column:auto;order:0}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .metric-value{font-size:40px}
  .cta-inner{padding:64px 0}
  .cta-inner h2{font-size:28px}
  .footer-main{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
  .float-cta{bottom:16px;right:16px;padding:12px 20px;font-size:13px}
}
@media(max-width:576px){
  .container{padding:0 16px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .demo-image img{aspect-ratio:4/3}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root {
  --bg: #F6F5F1;
  --surface: #FFFFFF;
  --ink: #16181A;
  --muted: #6B7178;
  --line: #E7E5E0;
  --accent: #00C2A8;
  --accent-weak: #E4F7F3;
  --accent-alt: #E2B963;
  --dark: #101213;
  --dark-soft: #1B1F22;
  --success: #2FA36B;
  --warning: #D98E32;
  --error: #C74444;
  --radius: 10px;
  --radius-lg: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16,18,20,.04);
  --shadow-md: 0 8px 24px rgba(16,18,20,.06);
  --shadow-lg: 0 12px 32px rgba(16,18,20,.10);
  --transition: all .25s ease;
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', Arial, sans-serif;
  --font-num: 'Inter', 'DIN Alternate', 'Roboto', sans-serif;
  --container: 1280px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  background-image: radial-gradient(rgba(0,0,0,0.015) 1px, transparent 1px);
  background-size: 20px 20px;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }

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

.text-accent { color: var(--accent); }
.text-num { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: .02em;
  transition: var(--transition);
  border: 1px solid transparent;
  text-align: center;
}
.btn:focus-visible {
  outline: 3px solid rgba(0, 194, 168, .4);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--accent);
  color: #05211D;
}
.btn-primary:hover {
  background: #009A85;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 194, 168, .25);
}
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,.6);
  color: #fff;
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn-outline:active { transform: translateY(0); }
.btn-dark {
  background: var(--dark);
  color: #fff;
}
.btn-dark:hover {
  background: var(--dark-soft);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-dark:active { transform: translateY(0); }
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  background: none;
  border: none;
  transition: var(--transition);
}
.btn-text svg { transition: transform .25s ease; }
.btn-text:hover svg { transform: translateX(4px); }
.btn-text:hover { color: var(--accent); }

/* ===== 顶部信息条 ===== */
.topbar {
  background: var(--dark);
  height: 36px;
  display: flex;
  align-items: center;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.topbar-domain {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  letter-spacing: .04em;
  font-family: var(--font-num);
}
.topbar-tip {
  font-size: 13px;
  color: rgba(255,255,255,.55);
  letter-spacing: .02em;
  flex: 1;
  text-align: center;
  padding: 0 16px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-btn {
  font-size: 13px;
  color: rgba(255,255,255,.85);
  padding: 4px 14px;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 4px;
  transition: var(--transition);
  white-space: nowrap;
}
.topbar-btn:hover {
  background: rgba(255,255,255,.15);
  color: #fff;
  border-color: rgba(255,255,255,.4);
}

/* ===== 主导航 ===== */
.site-header { position: relative; z-index: 100; }
.header-main {
  background: var(--surface);
  height: 72px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  transition: all .3s ease;
}
.header-main.is-scrolled {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  box-shadow: var(--shadow-md);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  z-index: 200;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-logo {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand-text {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink);
  white-space: nowrap;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  padding: 8px 0;
  transition: var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .25s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--ink); font-weight: 600; }
.nav-link.active::after { width: 100%; }
.nav-cta { flex-shrink: 0; }
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transition: var(--transition);
}
.nav-toggle:hover { background: var(--accent-weak); }
.nav-toggle svg { width: 24px; height: 24px; }

/* 移动端抽屉 */
.mobile-drawer {
  display: none;
}

/* ===== 页面 Banner ===== */
.page-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  background-color: var(--dark);
  background-size: cover;
  background-position: center;
  isolation: isolate;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(16,18,20,.92) 0%, rgba(16,18,20,.65) 50%, rgba(16,18,20,.35) 100%);
  z-index: -1;
}
.page-hero-inner {
  padding: 72px 0;
  max-width: 800px;
}
.page-hero .tag-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 20px;
}
.page-hero .tag-line::before {
  content: '';
  width: 28px;
  height: 2px;
  background: var(--accent);
  display: inline-block;
}
.page-hero h1 {
  font-size: 72px;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.15;
  color: #fff;
  margin-bottom: 20px;
}
.page-hero p.hero-sub {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255,255,255,.75);
  max-width: 560px;
}

/* ===== 数据指标 ===== */
.stats-section {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 48px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 16px 8px;
  border-right: 1px solid var(--line);
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-family: var(--font-num);
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label {
  font-size: 14px;
  color: var(--muted);
  letter-spacing: .04em;
}

/* ===== 通用区块 ===== */
.section {
  padding: 96px 0;
}
.section-sm {
  padding: 56px 0;
}
.section-header {
  margin-bottom: 56px;
  max-width: 720px;
}
.section-header .section-kicker {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.section-header .section-kicker::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent);
}
.section-header h2 {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -.02em;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 16px;
}
.section-header p.section-desc {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.8;
}

/* ===== 核心产品 ===== */
.product-section {
  background: var(--bg);
}
.product-grid-1 {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 24px;
  margin-bottom: 24px;
}
.product-grid-2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}
.product-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.product-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.product-card:hover::after { transform: scaleX(1); }
.product-card .prod-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
  background: var(--bg);
  aspect-ratio: 16/9;
}
.product-card .prod-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.product-card:hover .prod-media img { transform: scale(1.03); }
.product-card .prod-index {
  font-family: var(--font-num);
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.product-card h3 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 12px;
  color: var(--ink);
}
.product-card .prod-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 16px;
}
.product-card .prod-specs {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  display: grid;
  gap: 6px;
}
.product-card .prod-specs li {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  gap: 16px;
}
.product-card .prod-specs .spec-name {
  color: var(--muted);
}
.product-card .prod-specs .spec-val {
  color: var(--ink);
  font-weight: 500;
  text-align: right;
}

/* 横向产品条 */
.product-strip {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  align-items: stretch;
  gap: 32px;
  transition: var(--transition);
}
.product-strip:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}
.product-strip .strip-media {
  width: 220px;
  min-height: 140px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex-shrink: 0;
  align-self: center;
  background: var(--bg);
}
.product-strip .strip-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.product-strip .strip-body { flex: 1; }
.product-strip .strip-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}
.product-strip .strip-body p {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 12px;
  max-width: 640px;
}
.product-strip .strip-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.product-strip .strip-tags span {
  font-size: 13px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 3px 10px;
  transition: var(--transition);
}
.product-strip .strip-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-weak);
}

/* 产品卡角标 */
.prod-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--accent-alt);
  color: #1a170e;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 4px 12px;
  border-radius: 999px;
  z-index: 2;
  box-shadow: var(--shadow-sm);
}

/* ===== 参数表 ===== */
.table-section {
  background: var(--surface);
}
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}
.table-wrap th {
  background: var(--dark);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  padding: 16px 20px;
  white-space: nowrap;
}
.table-wrap td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--ink);
}
.table-wrap tr:last-child td { border-bottom: none; }
.table-wrap td:first-child {
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}
.table-wrap tr:hover td { background: var(--accent-weak); }
.table-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--muted);
}

/* ===== 选型优势 ===== */
.adv-section { background: var(--bg); }
.adv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}
.adv-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  transition: var(--transition);
}
.adv-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.adv-item .adv-no {
  font-family: var(--font-num);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.adv-item .adv-no::after {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--line);
}
.adv-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}
.adv-item p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== 流程 ===== */
.process-section { background: var(--surface); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: process;
}
.process-step {
  position: relative;
  padding: 32px 24px;
  border-left: 1px solid var(--line);
  transition: var(--transition);
}
.process-step::before {
  counter-increment: process;
  content: counter(process, decimal-leading-zero);
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-weak);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border: 1px solid rgba(0,194,168,.2);
}
.process-step h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 15px;
  color: var(--muted);
}
.process-step:hover { border-left-color: var(--accent); background: var(--accent-weak); }
.process-step:hover::before { background: var(--accent); color: #fff; }

/* ===== FAQ ===== */
.faq-section { background: var(--bg); }
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  transition: var(--transition);
}
.faq-q:hover { color: var(--accent); }
.faq-q .faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}
.faq-q .faq-icon::before,
.faq-q .faq-icon::after {
  content: '';
  position: absolute;
  background: var(--muted);
  transition: all .3s ease;
  border-radius: 2px;
}
.faq-q .faq-icon::before {
  top: 11px;
  left: 4px;
  width: 16px;
  height: 2px;
}
.faq-q .faq-icon::after {
  top: 4px;
  left: 11px;
  width: 2px;
  height: 16px;
}
.faq-item.open .faq-q .faq-icon::before { transform: rotate(180deg); }
.faq-item.open .faq-q .faq-icon::after { transform: rotate(90deg); }
.faq-item.open .faq-q .faq-icon::before,
.faq-item.open .faq-q .faq-icon::after { background: var(--accent); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item.open .faq-a {
  max-height: 400px;
}
.faq-a-inner {
  padding: 0 24px 20px 24px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin: 0 24px ?;
}
/* 修复上面的写法 */
.faq-a-inner {
  padding: 16px 24px 24px 24px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  border-top: 1px solid var(--line);
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  background: var(--dark);
  background-size: cover;
  background-position: center;
  isolation: isolate;
  padding: 96px 0;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(16,18,20,.8);
  z-index: -1;
}
.cta-section h2 {
  font-size: 40px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.02em;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 17px;
  color: rgba(255,255,255,.75);
  max-width: 560px;
  margin: 0 auto 36px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== CTA 联系表单 ===== */
.contact-cta {
  background: var(--dark-soft);
  border-radius: var(--radius);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.contact-cta h3 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.contact-cta p {
  color: rgba(255,255,255,.7);
  font-size: 15px;
  line-height: 1.8;
}
.contact-cta .btn { justify-self: start; }

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand-desc {
  margin-top: 16px;
  line-height: 1.8;
  color: rgba(255,255,255,.6);
  max-width: 320px;
  font-size: 14px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links {
  display: grid;
  gap: 10px;
}
.footer-links a {
  color: rgba(255,255,255,.6);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-contact {
  display: grid;
  gap: 12px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.6);
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}

/* ===== 浮动 CTA ===== */
.float-cta {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  padding: 12px 24px;
  border-radius: 999px;
  background: var(--accent);
  color: #05211D;
  font-weight: 600;
  font-size: 15px;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.float-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0,194,168,.3);
}
.float-cta:active { transform: translateY(0); }

/* ===== 动效 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .page-hero h1 { font-size: 56px; }
  .section { padding: 72px 0; }
  .product-grid-1 { grid-template-columns: 1fr 1fr; }
  .product-grid-1 .product-card:first-child { grid-column: span 1; }
  .product-grid-2 { grid-template-columns: 1fr 1fr; }
  .product-grid-2 .product-card:last-child { grid-column: span 2; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
  .adv-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .topbar-tip { display: none; }
  .section { padding: 56px 0; }
  .page-hero { min-height: 360px; }
  .page-hero h1 { font-size: 44px; }
  .page-hero p.hero-sub { font-size: 16px; }
  .nav-menu {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--dark);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    z-index: 300;
    padding: 40px;
  }
  .nav-menu.open { display: flex; }
  .nav-link {
    font-size: 28px;
    color: rgba(255,255,255,.8);
  }
  .nav-link:hover,
  .nav-link.active { color: #fff; }
  .nav-link::after { background: var(--accent); }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-drawer-btns {
    display: flex;
    gap: 12px;
    margin-top: 24px;
  }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 0; }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(n+3) { border-top: 1px solid var(--line); }
  .stat-number { font-size: 40px; }
  .product-grid-1 { grid-template-columns: 1fr; }
  .product-grid-2 { grid-template-columns: 1fr; }
  .product-grid-2 .product-card:last-child { grid-column: span 1; }
  .product-strip { flex-direction: column; }
  .product-strip .strip-media { width: 100%; min-height: 180px; }
  .table-wrap table { min-width: 600px; }
  .process-grid { grid-template-columns: 1fr; }
  .contact-cta { grid-template-columns: 1fr; padding: 32px; }
  .cta-section { padding: 64px 0; }
  .cta-section h2, .section-header h2 { font-size: 32px; }
  .float-cta { bottom: 16px; right: 16px; padding: 10px 20px; font-size: 14px; }
}

@media (max-width: 576px) {
  body { font-size: 15px; }
  .page-hero h1 { font-size: 36px; }
  .brand-text { font-size: 18px; }
  .brand-logo { width: 28px; height: 28px; }
  .header-main { height: 64px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-number { font-size: 34px; }
  .stat-label { font-size: 12px; }
  .section { padding: 40px 0; }
  .section-header { margin-bottom: 32px; }
  .section-header h2 { font-size: 26px; }
  .product-card { padding: 24px; }
  .product-strip { padding: 24px; }
  .process-step { padding: 24px 16px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: article */
:root {
  --bg: #F6F5F1;
  --surface: #FFFFFF;
  --ink: #16181A;
  --muted: #6B7178;
  --line: #E7E5E0;
  --accent: #00C2A8;
  --accent-weak: #E4F7F3;
  --accent-alt: #E2B963;
  --dark: #101213;
  --dark-soft: #1B1F22;
  --success: #2FA36B;
  --warning: #D98E32;
  --error: #C74444;
  --radius: 10px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(16,18,20,.04), 0 8px 24px rgba(16,18,20,.06);
  --shadow-md: 0 2px 4px rgba(16,18,20,.06), 0 12px 32px rgba(16,18,20,.10);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', Arial, sans-serif;
  --font-num: 'Inter', 'DIN Alternate', 'Roboto', monospace;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--ink); font-size: 16px; line-height: 1.8; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea { font: inherit; border: none; outline: none; }
ul, ol { list-style: none; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ===== 顶部信息条 ===== */
.topbar { background: var(--dark); color: rgba(255,255,255,.72); height: 36px; display: flex; align-items: center; font-size: 13px; letter-spacing: .02em; }
.topbar .container { display: flex; align-items: center; justify-content: space-between; }
.topbar-domain { color: rgba(255,255,255,.55); }
.topbar-right { display: flex; align-items: center; gap: 24px; }
.topbar-tip { color: rgba(255,255,255,.72); }
.topbar-link { color: rgba(255,255,255,.9); font-weight: 500; transition: color .25s ease; }
.topbar-link:hover { color: var(--accent); }

/* ===== 主导航 ===== */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 100; transition: box-shadow .3s ease, backdrop-filter .3s ease; }
.site-header.scrolled { box-shadow: 0 1px 2px rgba(16,18,20,.04), 0 9px 24px rgba(16,18,20,.06); backdrop-filter: blur(14px); background: rgba(255,255,255,.92); }
.nav-inner { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-logo { width: 38px; height: 38px; border-radius: 10px; background: var(--ink); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.brand-logo svg { width: 20px; height: 20px; }
.brand-text { font-size: 21px; font-weight: 700; letter-spacing: -.02em; color: var(--ink); line-height: 1.2; }
.nav-menu { display: flex; align-items: center; gap: 32px; }
.nav-link { font-size: 15px; color: var(--muted); position: relative; padding: 8px 2px; transition: color .25s ease; }
.nav-link::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--accent); border-radius: 2px; transition: width .25s ease; }
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--ink); font-weight: 600; }
.nav-link.active::after { width: 100%; }
.nav-right { display: flex; align-items: center; gap: 14px; }
.btn-nav { padding: 9px 22px; background: var(--accent); color: #05211D; border-radius: 8px; font-weight: 600; font-size: 14px; transition: all .25s ease; }
.btn-nav:hover { background: #009A85; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,194,168,.28); }
.btn-nav:active { transform: translateY(0); }
.menu-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; background: transparent; flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; }
.menu-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .3s ease, opacity .3s ease; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉 */
.mobile-drawer { display: none; }
@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav-menu.desktop-nav { display: none; }
  .mobile-drawer { display: flex; position: fixed; inset: 0; background: var(--surface); z-index: 999; flex-direction: column; align-items: center; justify-content: center; gap: 28px; opacity: 0; visibility: hidden; transition: opacity .3s ease, visibility .3s ease; }
  .mobile-drawer.open { opacity: 1; visibility: visible; }
  .mobile-drawer .nav-link { font-size: 28px; font-weight: 600; color: var(--ink); }
  .mobile-drawer .btn { font-size: 18px; margin-top: 16px; }
  .mobile-drawer .drawer-close { position: absolute; top: 20px; right: 20px; width: 44px; height: 44px; border-radius: 50%; background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: 22px; cursor: pointer; }
}

/* ===== 面包屑 ===== */
.breadcrumb { background: var(--surface); border-bottom: 1px solid var(--line); padding: 13px 0; font-size: 14px; color: var(--muted); }
.breadcrumb .container { display: flex; align-items: center; gap: 8px; }
.breadcrumb a { transition: color .25s ease; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--line); }
.breadcrumb .current { color: var(--ink); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; max-width: 320px; }

/* ===== 文章主体 ===== */
.article-section { padding: 64px 0 72px; background: var(--bg); }
.article-wrap { max-width: 780px; margin: 0 auto; }
.article-header { text-align: center; margin-bottom: 48px; }
.article-category { display: inline-block; background: var(--accent-weak); color: #007A68; font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 999px; letter-spacing: .03em; }
.article-title { font-size: 42px; font-weight: 700; letter-spacing: -.02em; line-height: 1.2; margin-top: 18px; margin-bottom: 16px; }
.article-meta { display: flex; justify-content: center; gap: 20px; color: var(--muted); font-size: 14px; flex-wrap: wrap; }
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta .meta-item svg { width: 15px; height: 15px; opacity: .6; }

.article-content { font-size: 16px; line-height: 1.8; color: var(--ink); }
.article-content > * { margin-bottom: 24px; }
.article-content > *:last-child { margin-bottom: 0; }
.article-content h2 { font-size: 28px; font-weight: 700; letter-spacing: -.01em; margin-top: 48px; padding-bottom: 10px; border-bottom: 2px solid var(--line); }
.article-content h3 { font-size: 22px; font-weight: 600; margin-top: 34px; }
.article-content h4 { font-size: 18px; font-weight: 600; margin-top: 28px; }
.article-content p { line-height: 1.8; }
.article-content a { color: #007A68; border-bottom: 1px solid rgba(0,122,104,.3); transition: border-color .25s ease, color .25s ease; }
.article-content a:hover { color: var(--accent); border-color: var(--accent); }
.article-content ul, .article-content ol { padding-left: 1.4em; }
.article-content ul li { list-style: disc; margin-bottom: 8px; }
.article-content ol li { list-style: decimal; margin-bottom: 8px; }
.article-content blockquote { border-left: 4px solid var(--accent); background: var(--accent-weak); padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--muted); font-size: 16px; line-height: 1.8; }
.article-content blockquote p { margin-bottom: 0; }
.article-content table { width: 100%; border-collapse: collapse; font-size: 14px; line-height: 1.6; }
.article-content th, .article-content td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--bg); font-weight: 600; }
.article-content img { border-radius: 12px; margin: 28px 0; }
.article-content pre { background: var(--dark); color: #e5e5e5; padding: 18px 22px; border-radius: var(--radius-sm); overflow-x: auto; font-size: 14px; line-height: 1.6; }
.article-content code { font-family: 'SFMono-Regular', Consolas, monospace; background: var(--bg); padding: 2px 6px; border-radius: 4px; font-size: 14px; }
.article-content pre code { background: transparent; padding: 0; }
.article-content hr { border: none; border-top: 1px solid var(--line); margin: 36px 0; }

/* ===== 标签列表 ===== */
.article-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--line); }
.article-tags .tag { background: var(--surface); border: 1px solid var(--line); border-radius: 999px; font-size: 13px; color: var(--muted); padding: 5px 14px; transition: all .25s ease; }
.article-tags .tag:hover { border-color: var(--accent); color: var(--ink); background: var(--accent-weak); }

/* ===== 返回按钮 ===== */
.back-section { margin-top: 40px; text-align: center; }
.btn-back { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); transition: all .25s ease; padding: 10px 22px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.btn-back:hover { color: var(--ink); border-color: var(--accent); }
.btn-back svg { width: 16px; height: 16px; transition: transform .25s ease; }
.btn-back:hover svg { transform: translateX(-4px); }

/* ===== 无内容状态 ===== */
.not-found { text-align: center; padding: 100px 24px; }
.not-found h2 { font-size: 32px; font-weight: 700; margin-bottom: 16px; }
.not-found p { color: var(--muted); margin-bottom: 32px; }

/* ===== 按钮 ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 8px; font-weight: 600; font-size: 15px; transition: all .25s ease; cursor: pointer; }
.btn-primary { background: var(--accent); color: #05211D; }
.btn-primary:hover { background: #009A85; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,194,168,.3); }
.btn-primary:active { transform: translateY(0); }
.btn-outline { background: transparent; border: 1px solid var(--ink); color: var(--ink); }
.btn-outline:hover { background: var(--ink); color: #fff; transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
.btn-light { background: #fff; color: var(--ink); }
.btn-light:hover { background: var(--accent-weak); transform: translateY(-2px); }
.btn-light:active { transform: translateY(0); }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { background: var(--accent-weak); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.2); }
.btn-white:active { transform: translateY(0); }

/* ===== 相关推荐 ===== */
.related-section { padding: 72px 0; background: var(--surface); border-top: 1px solid var(--line); }
.related-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 32px; }
.related-title { font-size: 28px; font-weight: 700; letter-spacing: -.02em; }
.related-sub { color: var(--muted); font-size: 14px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
.related-card img { width: 100%; height: 168px; object-fit: cover; }
.related-card-body { padding: 20px; }
.related-card h4 { font-size: 16px; font-weight: 600; line-height: 1.4; margin-bottom: 8px; color: var(--ink); transition: color .25s ease; }
.related-card:hover h4 { color: #007A68; }
.related-card time { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.related-card time::before { content: ''; display: inline-block; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; opacity: .5; }

/* ===== 文章底部 CTA ===== */
.article-cta { position: relative; padding: 80px 0; background: var(--dark); overflow: hidden; }
.article-cta .cta-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .35; }
.article-cta .cta-overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(16,18,20,.92) 0%, rgba(16,18,20,.75) 50%, rgba(16,18,20,.55) 100%); }
.article-cta .container { position: relative; z-index: 1; }
.cta-row { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.cta-copy .cta-label { display: inline-block; background: rgba(0,194,168,.18); color: var(--accent); font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 999px; margin-bottom: 16px; letter-spacing: .02em; }
.cta-copy h2 { font-size: 32px; font-weight: 700; color: #fff; line-height: 1.2; margin-bottom: 16px; letter-spacing: -.02em; }
.cta-copy p { color: rgba(255,255,255,.72); font-size: 15px; line-height: 1.7; margin-bottom: 28px; max-width: 400px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-img { border-radius: 12px; overflow: hidden; box-shadow: 0 20px 48px rgba(0,0,0,.35); }
.cta-img img { width: 100%; height: 260px; object-fit: cover; border-radius: 12px; }

/* ===== 页脚 ===== */
.footer { background: var(--dark); color: rgba(255,255,255,.65); padding: 64px 0 0; }
.footer-main { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 48px; }
.brand-text-footer { font-size: 20px; font-weight: 700; color: #fff; }
.footer-brand-desc { margin-top: 16px; font-size: 14px; line-height: 1.7; max-width: 340px; color: rgba(255,255,255,.55); }
.footer-title { color: #fff; font-weight: 600; font-size: 16px; margin-bottom: 18px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,.65); font-size: 14px; transition: color .25s ease; }
.footer-links a:hover { color: var(--accent); }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; margin-bottom: 12px; color: rgba(255,255,255,.65); }
.footer-contact svg { width: 15px; height: 15px; opacity: .6; flex-shrink: 0; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 22px 0; display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: rgba(255,255,255,.4); flex-wrap: wrap; gap: 12px; }

/* ===== 浮动CTA ===== */
.float-cta { position: fixed; right: 24px; bottom: 24px; z-index: 200; }
.float-cta .btn-float { display: inline-flex; align-items: center; gap: 8px; background: var(--accent); color: #05211D; padding: 13px 26px; border-radius: 999px; font-weight: 600; font-size: 15px; box-shadow: 0 4px 20px rgba(0,194,168,.35); transition: all .3s ease; border: none; cursor: pointer; }
.float-cta .btn-float:hover { background: #fff; color: var(--ink); transform: translateY(-3px); box-shadow: 0 8px 32px rgba(0,0,0,.18); }
.float-cta .btn-float:active { transform: translateY(0); }
.float-cta .btn-float svg { width: 16px; height: 16px; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-row { grid-template-columns: 1fr; gap: 24px; }
  .cta-copy p { max-width: none; }
  .cta-img img { height: 220px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-menu.desktop-nav { display: none; }
  .menu-toggle { display: flex; }
  .topbar-tip { display: none; }
  .article-section { padding: 44px 0 56px; }
  .article-title { font-size: 32px; }
  .article-meta { gap: 12px; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card img { height: 200px; }
  .footer-main { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .float-cta { right: 16px; bottom: 16px; }
}
@media (max-width: 576px) {
  .container { padding: 0 16px; }
  .article-title { font-size: 28px; }
  .article-meta { flex-direction: column; align-items: center; gap: 6px; }
  .article-content h2 { font-size: 24px; }
  .article-content h3 { font-size: 20px; }
  .article-content table { display: block; overflow-x: auto; white-space: nowrap; }
  .cta-copy h2 { font-size: 26px; }
  .cta-img img { height: 180px; }
  .related-card img { height: 180px; }
  .breadcrumb .current { max-width: 160px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* roulang page: category2 */
:root {
  --bg: #F6F5F1;
  --surface: #FFFFFF;
  --ink: #16181A;
  --muted: #6B7178;
  --line: #E7E5E0;
  --accent: #00C2A8;
  --accent-weak: #E4F7F3;
  --accent-alt: #E2B963;
  --dark: #101213;
  --dark-soft: #1B1F22;
  --success: #2FA36B;
  --warning: #D98E32;
  --error: #C74444;
  --radius: 10px;
  --radius-img: 12px;
  --shadow-1: 0 1px 2px rgba(16,18,20,.04), 0 8px 24px rgba(16,18,20,.06);
  --shadow-2: 0 2px 4px rgba(16,18,20,.08), 0 12px 32px rgba(16,18,20,.10);
  --container: 1280px;
  --space: 96px;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", Arial, sans-serif;
  --font-num: "Inter", "DIN Alternate", "Roboto", monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }

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

/* ===== Top Bar ===== */
.topbar {
  height: 36px;
  background: var(--dark);
  display: flex;
  align-items: center;
  font-size: 13px;
  letter-spacing: 0.02em;
}
.topbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.topbar .domain { color: rgba(255,255,255,.7); }
.topbar .hint { color: rgba(255,255,255,.7); text-align: center; }
.topbar .cta-btn {
  color: rgba(255,255,255,.9);
  font-size: 13px;
  padding: 2px 12px;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 999px;
  transition: all .25s ease;
  background: none;
}
.topbar .cta-btn:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.6); }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: 0 1px 12px rgba(0,0,0,.05); }
.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
  gap: 32px;
  transition: height .25s ease;
}
.site-header.scrolled .header-inner { height: 64px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 38px; height: 38px;
  background: var(--dark);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 18px;
  transition: background .25s ease;
}
.brand-mark i { font-size: 18px; }
.brand-text { font-size: 20px; font-weight: 700; letter-spacing: -0.02em; color: var(--ink); }
.brand-text em { font-style: normal; color: var(--accent); }

.nav-menu { display: flex; gap: 28px; align-items: center; }
.nav-menu .nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  padding: 8px 0;
  transition: color .25s ease;
}
.nav-menu .nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  transition: width .25s ease;
}
.nav-menu .nav-link:hover::after,
.nav-menu .nav-link.active::after { width: 100%; }
.nav-menu .nav-link.active { color: var(--ink); font-weight: 600; }

.header-actions { display: flex; align-items: center; gap: 16px; }
.btn-header {
  background: var(--accent);
  color: #05211D;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 8px;
  border: none;
  transition: all .25s ease;
  letter-spacing: .01em;
}
.btn-header:hover { background: #009A85; transform: translateY(-2px); box-shadow: var(--shadow-2); }
.btn-header:active { transform: translateY(0); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--ink);
  padding: 4px;
}
.mobile-drawer {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(16,18,20,.98);
  z-index: 300;
  padding: 32px 24px;
  flex-direction: column;
  overflow-y: auto;
}
.mobile-drawer.open { display: flex; }
.mobile-drawer .drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 48px;
}
.mobile-drawer .drawer-brand { color: #fff; font-size: 22px; font-weight: 700; }
.mobile-drawer .close-drawer { background: none; border: none; color: #fff; font-size: 28px; }
.mobile-drawer .drawer-nav { display: flex; flex-direction: column; gap: 8px; }
.mobile-drawer .drawer-nav a {
  color: rgba(255,255,255,.85);
  font-size: 28px;
  font-weight: 600;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
  transition: color .25s ease, padding-left .25s ease;
}
.mobile-drawer .drawer-nav a:hover,
.mobile-drawer .drawer-nav a.active { color: var(--accent); padding-left: 8px; }
.mobile-drawer .drawer-cta {
  margin-top: 32px;
  background: var(--accent);
  color: #05211D;
  border: none;
  font-size: 18px;
  font-weight: 600;
  padding: 14px;
  border-radius: 8px;
}

/* ===== Hero Inner ===== */
.page-hero {
  position: relative;
  padding: 112px 0 88px;
  background: linear-gradient(135deg, rgba(16,18,20,.82), rgba(16,18,20,.55) 60%, rgba(16,18,20,.72)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,.1);
  color: #fff;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 { font-size: 56px; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; color: #fff; margin-bottom: 16px; }
.page-hero h1 .accent-text { color: var(--accent); }
.page-hero p { font-size: 18px; line-height: 1.8; max-width: 680px; color: rgba(255,255,255,.85); }
.page-hero .hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.7);
  font-size: 24px;
  animation: heroBounce 2s infinite;
}

@keyframes heroBounce {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 10px); }
}

/* ===== Section Common ===== */
.section { padding: var(--space) 0; }
.section-lg { padding: 64px 0 96px; }
.section-sm { padding: 48px 0 64px; }
.section-title { font-size: 40px; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 16px; color: var(--ink); }
.section-desc { font-size: 17px; color: var(--muted); max-width: 640px; line-height: 1.8; margin-bottom: 48px; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ===== Scene Block ===== */
.scene-block { display: flex; align-items: center; gap: 64px; margin-bottom: 80px; }
.scene-block:nth-child(even) { flex-direction: row-reverse; }
.scene-block:last-child { margin-bottom: 0; }
.scene-img {
  flex: 1;
  margin: 0;
  border-radius: var(--radius-img);
  overflow: hidden;
  box-shadow: var(--shadow-1);
  position: relative;
}
.scene-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.scene-img:hover img { transform: scale(1.03); }
.scene-body { flex: 1; }
.scene-body .index-label {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}
.scene-body h2 { font-size: 32px; line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 16px; color: var(--ink); }
.scene-body .lead { color: var(--muted); font-size: 16px; line-height: 1.8; margin-bottom: 24px; }
.scene-list { margin-bottom: 28px; }
.scene-list li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.8;
}
.scene-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 12px;
  width: 18px; height: 18px;
  background: var(--accent-weak);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.scene-list li::after {
  content: "";
  position: absolute;
  left: 5px; top: 17px;
  width: 7px; height: 3px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

.btn-solid {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #05211D;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 8px;
  border: none;
  transition: all .25s ease;
  letter-spacing: .01em;
}
.btn-solid:hover { background: #009A85; transform: translateY(-2px); box-shadow: var(--shadow-2); }
.btn-solid:active { transform: translateY(0); }

/* ===== Process / Steps ===== */
.process-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-item {
  position: relative;
  padding: 32px 24px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: box-shadow .25s ease, transform .25s ease;
}
.process-item:hover { box-shadow: var(--shadow-1); transform: translateY(-4px); }
.process-item .step-num {
  font-family: var(--font-num);
  font-size: 44px;
  font-weight: 700;
  color: var(--accent-weak);
  line-height: 1;
  margin-bottom: 16px;
  display: block;
  -webkit-text-stroke: 1px rgba(0,194,168,.4);
}
.process-item h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.process-item p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ===== Metrics Band ===== */
.metrics-band {
  background: var(--dark);
  color: #fff;
  padding: 56px 0;
}
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.metric-item { border-right: 1px solid rgba(255,255,255,.15); }
.metric-item:last-child { border-right: none; }
.metric-num {
  font-family: var(--font-num);
  font-size: 44px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  display: block;
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 8px;
}
.metric-label { font-size: 14px; color: rgba(255,255,255,.65); letter-spacing: .02em; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(180deg, rgba(16,18,20,.9), rgba(16,18,20,.82)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  color: #fff;
  text-align: center;
  padding: 112px 24px;
}
.cta-section h2 { font-size: 40px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 16px; }
.cta-section p { font-size: 17px; color: rgba(255,255,255,.8); max-width: 560px; margin: 0 auto 40px; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .25s ease, background .25s ease;
}
.faq-item.active { border-color: var(--accent); background: var(--surface); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  height: 56px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  color: var(--ink);
  transition: color .25s ease;
}
.faq-question .faq-icon { flex-shrink: 0; margin-left: 16px; font-size: 18px; transition: transform .3s ease; color: var(--muted); }
.faq-item.active .faq-question .faq-icon { transform: rotate(45deg); color: var(--accent); }
.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  display: none;
}
.faq-item.active .faq-answer { display: block; }

/* ===== Footer ===== */
.footer { background: var(--dark); color: rgba(255,255,255,.7); padding: 72px 0 0; }
.footer-main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand-desc { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.55); margin-top: 16px; max-width: 320px; }
.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links li { margin-bottom: 12px; }
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,.65);
  transition: color .25s ease;
}
.footer-links a:hover { color: var(--accent); }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  margin-bottom: 12px;
  color: rgba(255,255,255,.65);
  line-height: 1.7;
}
.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}

/* ===== Floating CTA ===== */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 150;
  background: var(--dark);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 999px;
  border: none;
  box-shadow: var(--shadow-2);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all .25s ease;
}
.float-cta i { color: var(--accent); }
.float-cta:hover { background: var(--dark-soft); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,0,0,.25); }
.float-cta:active { transform: translateY(0); }

/* ===== Reveal Animation ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root { --space: 72px; }
  .scene-block { gap: 40px; }
  .process-row { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  :root { --space: 56px; }
  .section-title { font-size: 32px; }
  .page-hero h1 { font-size: 40px; }
  .page-hero { padding: 80px 0 64px; }
  .nav-toggle { display: block; }
  .nav-menu { display: none; }
  .btn-header { display: none; }
  .scene-block, .scene-block:nth-child(even) { flex-direction: column; gap: 24px; }
  .scene-body h2 { font-size: 28px; }
  .process-row { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .metric-item:nth-child(2) { border-right: none; }
  .metric-item { padding: 16px 0; }
  .cta-section { padding: 72px 16px; }
  .cta-section h2 { font-size: 32px; }
  .faq-question { height: auto; padding: 18px 20px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer { padding-top: 48px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .float-cta { right: 16px; bottom: 16px; padding: 12px 20px; font-size: 14px; }
}

@media (max-width: 576px) {
  .section-title { font-size: 28px; }
  .page-hero h1 { font-size: 36px; }
  .page-hero p { font-size: 16px; }
  .topbar .hint { display: none; }
  .topbar .domain { flex: 1; }
  .metrics-grid { grid-template-columns: 1fr; }
  .metric-item, .metric-item:nth-child(2) { border-right: none; border-bottom: 1px solid rgba(255,255,255,.15); }
  .metric-item:last-child { border-bottom: none; }
  .float-cta span { display: none; }
  .float-cta { border-radius: 50%; padding: 16px; }
}

@media (max-width: 375px) {
  .page-hero h1 { font-size: 32px; }
  .container { padding: 0 16px; }
  .process-item { padding: 24px 16px; }
}

/* roulang page: category3 */
:root {
  --bg: #F6F5F1;
  --surface: #FFFFFF;
  --ink: #16181A;
  --muted: #6B7178;
  --line: #E7E5E0;
  --accent: #00C2A8;
  --accent-weak: #E4F7F3;
  --accent-alt: #E2B963;
  --dark: #101213;
  --dark-soft: #1B1F22;
  --success: #2FA36B;
  --warning: #D98E32;
  --error: #C74444;
  --radius-card: 10px;
  --radius-img: 12px;
  --radius-btn: 999px;
  --shadow-1: 0 1px 2px rgba(16,18,20,.04), 0 8px 24px rgba(16,18,20,.06);
  --shadow-2: 0 1px 2px rgba(16,18,20,.06), 0 12px 32px rgba(16,18,20,.10);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  --font-num: "Inter", "DIN Alternate", Roboto, sans-serif;
  --tr: all .25s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: var(--tr);
}
img {
  max-width: 100%;
  display: block;
}
ul, ol {
  list-style: none;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 96px 0;
}
.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--accent);
  background: var(--accent-weak);
  padding: 4px 14px;
  border-radius: var(--radius-btn);
  margin-bottom: 16px;
}
.section-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}
.section-desc strong {
  color: var(--ink);
  font-weight: 600;
}

/* 顶部信息条 */
.topbar {
  background: var(--dark);
  height: 36px;
  display: flex;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,.7);
  letter-spacing: .02em;
  position: relative;
  z-index: 100;
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topbar-domain {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .02em;
}
.topbar-tip {
  text-align: center;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-action {
  font-size: 13px;
  color: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius-btn);
  padding: 2px 14px;
  transition: var(--tr);
  white-space: nowrap;
}
.topbar-action:hover {
  background: rgba(255,255,255,.12);
  border-color: rgba(255,255,255,.5);
  color: #fff;
}

/* 主导航 */
.main-header {
  position: sticky;
  top: 0;
  z-index: 99;
  background: var(--surface);
  height: 72px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--line);
  transition: var(--tr);
}
.main-header.scrolled {
  height: 64px;
  border-bottom-color: rgba(231,229,224,.6);
  box-shadow: 0 4px 20px rgba(16,18,20,.05);
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,.92);
}
.main-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #05211D;
  flex-shrink: 0;
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  white-space: nowrap;
}
.brand-text em {
  font-style: normal;
  color: var(--accent);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: auto;
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  padding: 8px 0;
  transition: var(--tr);
  white-space: nowrap;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width .25s ease;
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}
.nav-link:hover {
  color: var(--accent);
}
.nav-link.active {
  color: var(--accent);
  font-weight: 600;
}
.nav-cta {
  margin-left: 8px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: var(--tr);
  border: 1px solid transparent;
  line-height: 1.4;
  text-align: center;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #05211D;
  box-shadow: 0 1px 2px rgba(0,194,168,.3), 0 8px 20px rgba(0,194,168,.2);
}
.btn-primary:hover {
  background: #009A85;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,154,133,.3), 0 12px 28px rgba(0,154,133,.18);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.5);
  color: #fff;
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.8);
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(0);
}
.btn-outline-dark {
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
}
.btn-outline-dark:hover {
  background: var(--ink);
  color: #fff;
  transform: translateY(-2px);
}
.btn-outline-dark:active {
  transform: translateY(0);
}
.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: var(--tr);
}
.nav-toggle:hover {
  border-color: var(--accent);
}
.nav-toggle:hover span {
  background: var(--accent);
}

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: var(--dark);
  z-index: 200;
  display: flex;
  flex-direction: column;
  padding: 32px 24px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-20px);
  transition: var(--tr);
}
.mobile-drawer.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.drawer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 48px;
}
.drawer-top .brand-text {
  color: #fff;
}
.drawer-close {
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255,255,255,.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  transition: var(--tr);
}
.drawer-close:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(90deg);
}
.drawer-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.drawer-menu a {
  font-size: 28px;
  font-weight: 700;
  color: rgba(255,255,255,.85);
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: var(--tr);
}
.drawer-menu a:hover {
  color: var(--accent);
  padding-left: 8px;
}
.drawer-menu a.active {
  color: var(--accent);
}
.drawer-contact {
  margin-top: auto;
  color: rgba(255,255,255,.6);
  font-size: 14px;
  line-height: 2;
}

/* Hero/页头 */
.page-banner {
  position: relative;
  background-color: var(--dark);
  color: #fff;
  padding: 104px 0 96px;
  overflow: hidden;
}
.page-banner .container {
  position: relative;
  z-index: 2;
}
.banner-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: .3;
  filter: grayscale(10%);
}
.banner-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(16,18,20,.92) 30%, rgba(16,18,20,.55) 70%, rgba(16,18,20,.3) 100%);
}
.banner-title {
  font-size: 72px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  max-width: 800px;
}
.banner-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255,255,255,.75);
  max-width: 620px;
  margin-bottom: 40px;
}
.banner-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.breadcrumb {
  padding: 12px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}
.breadcrumb .container {
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb-sep {
  color: var(--line);
  margin: 0 4px;
}
.breadcrumb-current {
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 420px;
}

/* 支持服务条目 */
.support-list {
  border-top: 1px solid var(--line);
}
.support-item {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 40px 8px;
  border-bottom: 1px solid var(--line);
  transition: var(--tr);
}
.support-item:hover {
  background: var(--surface);
  padding-left: 20px;
  padding-right: 20px;
  box-shadow: var(--shadow-1);
}
.support-num {
  flex-shrink: 0;
  font-family: var(--font-num);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
  width: 88px;
  line-height: 1;
  opacity: .6;
  transition: var(--tr);
}
.support-item:hover .support-num {
  opacity: 1;
}
.support-body {
  flex: 1;
}
.support-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.support-body p {
  color: var(--muted);
  font-size: 15px;
  max-width: 720px;
}
.support-arrow {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: var(--tr);
}
.support-item:hover .support-arrow {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateX(4px);
}

/* 流程 */
.process-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-step {
  padding: 32px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
  transition: var(--tr);
  position: relative;
}
.process-step:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
  border-color: rgba(0,194,168,.4);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--accent-weak);
  color: var(--accent);
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  transition: var(--tr);
}
.process-step:hover .step-num {
  background: var(--accent);
  color: #05211D;
}
.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* FAQ */
.faq-section {
  background: var(--bg);
}
.faq-wrap {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  background: var(--surface);
  overflow: hidden;
  transition: var(--tr);
}
.faq-item.active {
  border-color: var(--accent);
  box-shadow: var(--shadow-1);
}
.faq-head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  line-height: 1.5;
  transition: var(--tr);
}
.faq-head:hover {
  color: var(--accent);
}
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--muted);
  transition: var(--tr);
  position: relative;
}
.faq-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 2px;
  background: currentColor;
  transform: translate(-50%, -50%);
}
.faq-icon::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 2px;
  height: 10px;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: var(--tr);
}
.faq-item.active .faq-icon {
  border-color: var(--accent);
  color: var(--accent);
}
.faq-item.active .faq-icon::before {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-body-inner {
  padding: 0 24px 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
  border-left: 2px solid var(--accent);
  margin-left: 24px;
  margin-right: 24px;
  padding-left: 12px;
}

/* 联系表单 */
.contact-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 64px;
  align-items: start;
}
.contact-info h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.contact-info > p {
  color: var(--muted);
  margin-bottom: 32px;
  max-width: 420px;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.contact-item-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-weak);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-item-icon svg {
  width: 20px;
  height: 20px;
}
.contact-item h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}
.contact-item p {
  font-size: 16px;
  color: var(--ink);
  font-family: var(--font-num);
}
.contact-item p a {
  color: var(--ink);
}
.contact-item p a:hover {
  color: var(--accent);
}
.contact-form-wrap {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 40px;
}
.form-group {
  margin-bottom: 24px;
}
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}
.form-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  font-size: 15px;
  color: var(--ink);
  transition: var(--tr);
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-weak);
}
.form-input::placeholder {
  color: #b0b4b8;
}
textarea.form-input {
  height: auto;
  min-height: 120px;
  padding: 14px 16px;
  resize: vertical;
  line-height: 1.6;
}
.form-submit {
  width: 100%;
  margin-top: 8px;
}
.form-note {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-top: 12px;
}

/* 浮动 CTA */
.cta-float {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 150;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--dark);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 8px 30px rgba(16,18,20,.25);
  transition: var(--tr);
  cursor: pointer;
  border: 1px solid transparent;
}
.cta-float:hover {
  background: var(--accent);
  color: #05211D;
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,194,168,.3);
}
.cta-float:active {
  transform: translateY(0);
}
.cta-float svg {
  width: 18px;
  height: 18px;
}

/* 页脚 */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.7);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-main {
  display: grid;
  grid-template-columns: 1.4fr .8fr .8fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand-desc {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,.55);
  max-width: 300px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links li,
.footer-contact li {
  margin-bottom: 10px;
}
.footer-links a,
.footer-contact a {
  color: rgba(255,255,255,.6);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--tr);
}
.footer-links a:hover,
.footer-contact a:hover {
  color: var(--accent);
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,.6);
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: .7;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.45);
}

/* reveal 动效 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* 响应式 */
@media (max-width: 1024px) {
  .nav-menu {
    gap: 20px;
  }
  .banner-title {
    font-size: 56px;
  }
  .process-grid {
    grid-template-columns: 1fr 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 32px;
  }
  .banner-title {
    font-size: 44px;
  }
  .page-banner {
    padding: 64px 0 56px;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .support-item {
    flex-direction: column;
    gap: 16px;
    padding: 28px 8px;
  }
  .support-item:hover {
    padding-left: 12px;
    padding-right: 12px;
  }
  .support-num {
    font-size: 36px;
    width: auto;
  }
  .contact-form-wrap {
    padding: 24px;
  }
  .footer-main {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .cta-float {
    right: 16px;
    bottom: 16px;
    padding: 12px 20px;
    font-size: 14px;
  }
  .btn {
    padding: 10px 22px;
  }
}
@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }
  .topbar .container {
    gap: 8px;
  }
  .topbar-tip {
    font-size: 12px;
  }
  .topbar-domain {
    display: none;
  }
  .banner-title {
    font-size: 40px;
  }
  .banner-actions {
    flex-direction: column;
    width: 100%;
  }
  .banner-actions .btn {
    width: 100%;
  }
  .section-title {
    font-size: 26px;
  }
  .faq-head {
    font-size: 15px;
    padding: 16px 16px;
  }
  .faq-body-inner {
    margin-left: 16px;
    margin-right: 16px;
  }
  .contact-info h2 {
    font-size: 24px;
  }
  .drawer-menu a {
    font-size: 22px;
  }
}