/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
  --brand-500: #3F8EB5;
  --brand-600: #2F7898;
  --brand-700: #28688A;
  --brand-100: #E8F3F8;
  --accent-500: #F08C3E;
  --accent-600: #D97A28;
  --success: #2E9E63;
  --warning: #D9822B;
  --danger: #D64545;
  --text-900: #1B2A32;
  --text-600: #4B6270;
  --text-400: #8498A3;
  --bg-page: #F6F9FB;
  --bg-surface: #FFFFFF;
  --bg-footer: #EAF1F5;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-sm: 0 6px 20px rgba(27,42,50,.06);
  --shadow-lg: 0 12px 32px rgba(27,42,50,.10);
  --shadow-focus: 0 0 0 3px rgba(63,142,181,.2);
  --border-color: rgba(27,42,50,.08);
  --border-light: rgba(27,42,50,.06);
  --font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  --container-max: 1200px;
  --container-padding: 24px;
  --section-padding: 80px;
  --transition: .2s ease;
}

/* ========== Reset / 基础 ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  font-size:16px;
  line-height:1.7;
  color:var(--text-900);
  background:var(--bg-page);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:var(--brand-600);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--brand-700)}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text-900)}
.container{max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:600;
  padding:14px 28px;
  border-radius:var(--radius-md);
  transition:all var(--transition);
  line-height:1.2;
  cursor:pointer;
  text-decoration:none;
  border:2px solid transparent;
}
.btn:focus-visible{outline:none;box-shadow:var(--shadow-focus)}
.btn-accent{background:var(--accent-500);color:#fff;border-color:var(--accent-500)}
.btn-accent:hover{background:var(--accent-600);border-color:var(--accent-600);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(240,140,62,.35)}
.btn-accent:active{transform:scale(.98)}
.btn-outline{background:transparent;color:var(--brand-700);border-color:var(--brand-500)}
.btn-outline:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-2px)}
.btn-outline:active{transform:scale(.98)}
.btn-brand{background:var(--brand-500);color:#fff;border-color:var(--brand-500)}
.btn-brand:hover{background:var(--brand-600);border-color:var(--brand-600);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(63,142,181,.3)}
.btn-link{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-600);font-weight:600;font-size:14px;
  padding:4px 0;background:none;border:none;cursor:pointer;
  transition:gap var(--transition),color var(--transition);
}
.btn-link:hover{color:var(--brand-700);gap:10px}
.btn-link .arrow{transition:transform var(--transition)}

/* ========== 头部导航 ========== */
.site-header{
  position:fixed;top:16px;left:50%;transform:translateX(-50%);
  z-index:1000;width:calc(100% - 48px);max-width:var(--container-max);
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-radius:var(--radius-pill);
  border:1px solid rgba(255,255,255,.4);
  box-shadow:0 6px 28px rgba(27,42,50,.08);
  transition:box-shadow var(--transition),background var(--transition);
}
.site-header.scrolled{background:rgba(255,255,255,.95);box-shadow:0 8px 36px rgba(27,42,50,.12)}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 20px 10px 24px;max-width:var(--container-max);margin:0 auto;
}
.brand-logo{
  font-size:20px;font-weight:800;color:var(--text-900);
  letter-spacing:-.5px;white-space:nowrap;
  display:flex;align-items:center;gap:6px;
}
.brand-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--accent-500);display:inline-block}
.brand-logo:hover{color:var(--brand-700)}
.main-nav{display:flex;align-items:center;gap:4px}
.main-nav a{
  padding:7px 16px;border-radius:var(--radius-pill);
  font-size:14px;font-weight:500;color:var(--text-600);
  transition:all var(--transition);position:relative;
}
.main-nav a:hover{color:var(--brand-600);background:rgba(63,142,181,.06)}
.main-nav a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600}
.nav-cta{
  font-size:13px;padding:9px 20px;border-radius:var(--radius-pill);
  white-space:nowrap;
}
.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:5px;
  width:40px;height:40px;padding:8px;border-radius:50%;
  background:var(--brand-100);cursor:pointer;align-items:center;
}
.nav-toggle span{width:18px;height:2px;background:var(--brand-700);border-radius:2px;transition:all .3s ease}
.mobile-menu{
  display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:999;
  background:rgba(255,255,255,.98);padding:80px 24px 40px;
  flex-direction:column;justify-content:space-between;
  opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;
}
.mobile-menu.open{opacity:1;visibility:visible;display:flex}
.mobile-menu nav{display:flex;flex-direction:column;gap:8px}
.mobile-menu nav a{
  font-size:18px;font-weight:600;color:var(--text-900);
  padding:14px 20px;border-radius:var(--radius-md);
  transition:background var(--transition),color var(--transition);
}
.mobile-menu nav a:hover{background:var(--brand-100);color:var(--brand-700)}
.mobile-menu nav a.active{background:var(--brand-100);color:var(--brand-700)}
.mobile-menu .btn{width:100%;margin-top:16px}
.mobile-menu-close{
  position:absolute;top:16px;right:16px;width:40px;height:40px;
  border-radius:50%;background:var(--brand-100);display:flex;align-items:center;justify-content:center;
  font-size:18px;color:var(--text-600);cursor:pointer;
}

/* ========== Hero ========== */
.hero{
  position:relative;
  background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding:160px 0 100px;
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(120deg,
    rgba(255,255,255,.96) 0%,
    rgba(255,255,255,.92) 35%,
    rgba(232,243,248,.88) 65%,
    rgba(232,243,248,.75) 100%
  );
  z-index:0;
}
.hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.1fr .9fr;
  gap:64px;align-items:center;
}
.hero-tag{
  display:inline-block;
  padding:5px 16px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:12px;font-weight:600;
  border-radius:var(--radius-pill);
  margin-bottom:20px;
  letter-spacing:1px;
}
.hero h1{
  font-size:42px;font-weight:800;
  color:var(--text-900);
  line-height:1.25;
  margin-bottom:18px;
  letter-spacing:-.5px;
}
.hero h1 .brand{color:var(--brand-500);position:relative}
.hero h1 .brand::after{
  content:'';position:absolute;left:0;bottom:2px;width:100%;height:6px;
  background:rgba(63,142,181,.2);border-radius:3px;z-index:-1;
}
.hero-desc{
  font-size:16px;color:var(--text-600);
  line-height:1.8;margin-bottom:32px;max-width:480px;
}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:32px}
.hero-login-quick{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--radius-pill);
  background:rgba(63,142,181,.08);color:var(--brand-700);
  font-size:13px;font-weight:500;transition:all var(--transition);
}
.hero-login-quick:hover{background:rgba(63,142,181,.16);color:var(--brand-700)}
.hero-visual{position:relative}
.hero-visual img{
  border-radius:var(--radius-lg);
  box-shadow:0 20px 60px rgba(27,42,50,.15);
  width:100%;height:auto;object-fit:cover;
}
.hero-float-card{
  position:absolute;bottom:-20px;left:-20px;
  background:var(--bg-surface);
  border-radius:var(--radius-md);
  padding:14px 20px;
  box-shadow:var(--shadow-lg);
  display:flex;align-items:center;gap:12px;
  animation:floatY 3s ease-in-out infinite;
}
.hero-float-card .icon{
  width:38px;height:38px;border-radius:50%;
  background:var(--brand-100);display:flex;align-items:center;justify-content:center;
  color:var(--brand-600);font-size:18px;
}
.hero-float-card .info b{font-size:15px;color:var(--text-900);display:block}
.hero-float-card .info span{font-size:12px;color:var(--text-400)}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* ========== 数据信任条 ========== */
.stats-bar{
  background:var(--bg-surface);
  border-bottom:1px solid var(--border-color);
  padding:32px 0;
  position:relative;z-index:2;
}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:32px;
  max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding);
}
.stat-item{
  text-align:center;position:relative;
  padding:8px 16px;
}
.stat-item:not(:last-child)::after{
  content:'';position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:1px;height:40px;background:var(--border-light);
}
.stat-num{
  font-size:30px;font-weight:800;color:var(--brand-600);
  line-height:1.2;display:block;
}
.stat-label{font-size:13px;color:var(--text-400);margin-top:4px;display:block}

/* ========== 通用板块标题 ========== */
.section-head{
  text-align:center;max-width:640px;margin:0 auto 48px;
}
.section-tag{
  display:inline-block;
  padding:4px 14px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:12px;font-weight:600;
  border-radius:var(--radius-pill);
  letter-spacing:1px;
  margin-bottom:14px;
}
.section-head h2{
  font-size:30px;font-weight:800;
  color:var(--text-900);
  margin-bottom:12px;
  letter-spacing:-.3px;
}
.section-head p{font-size:15px;color:var(--text-600);line-height:1.7}

/* ========== 功能分组 ========== */
.features{
  padding:var(--section-padding) 0;
  background:var(--bg-page);
}
.features-layout{
  display:grid;grid-template-columns:1.05fr .95fr;
  gap:48px;align-items:center;
}
.features-list{display:flex;flex-direction:column;gap:20px}
.feature-row{
  display:flex;gap:18px;align-items:flex-start;
  background:var(--bg-surface);
  border-radius:var(--radius-lg);
  padding:22px 24px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border-color);
  transition:all var(--transition);
}
.feature-row:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(63,142,181,.25);
}
.feature-icon{
  flex-shrink:0;
  width:44px;height:44px;
  border-radius:var(--radius-md);
  background:var(--brand-100);
  display:flex;align-items:center;justify-content:center;
  color:var(--brand-600);font-size:20px;
}
.feature-row h3{font-size:17px;font-weight:700;margin-bottom:4px}
.feature-row p{font-size:14px;color:var(--text-600);line-height:1.6}
.features-visual{position:relative}
.features-visual img{
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);
  width:100%;height:auto;object-fit:cover;
}
.features-visual::after{
  content:'';position:absolute;left:-16px;bottom:-16px;
  width:100px;height:100px;
  border-radius:var(--radius-lg);
  background:var(--brand-100);
  z-index:-1;
}

/* ========== 使用场景 ========== */
.scenarios{
  padding:var(--section-padding) 0;
  background:var(--bg-surface);
  border-top:1px solid var(--border-color);
  border-bottom:1px solid var(--border-color);
}
.scenario-scroll{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.scenario-card{
  background:var(--bg-surface);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border-color);
  transition:all var(--transition);
  display:flex;flex-direction:column;
}
.scenario-card:hover{
  transform:translateY(-6px);
  box-shadow:var(--shadow-lg);
}
.scenario-card img{
  width:100%;height:190px;object-fit:cover;
}
.scenario-body{padding:20px 22px;display:flex;flex-direction:column;flex:1}
.scenario-body h3{font-size:18px;font-weight:700;margin-bottom:6px}
.scenario-body p{font-size:14px;color:var(--text-600);line-height:1.65;margin-bottom:14px;flex:1}

/* ========== 成功案例 ========== */
.cases{
  padding:var(--section-padding) 0;
  background:var(--bg-page);
}
.cases-list{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.case-card{
  background:var(--bg-surface);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border-color);
  transition:all var(--transition);
  display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.case-img{position:relative}
.case-img img{width:100%;height:170px;object-fit:cover}
.case-result{
  position:absolute;right:12px;top:12px;
  background:rgba(255,255,255,.92);
  color:var(--brand-700);
  font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:var(--radius-pill);
  backdrop-filter:blur(4px);
}
.case-body{padding:20px 22px;display:flex;flex-direction:column;flex:1}
.case-body h3{font-size:17px;font-weight:700;margin-bottom:6px}
.case-body p{font-size:14px;color:var(--text-600);line-height:1.65;flex:1}

/* ========== 服务方案 ========== */
.pricing{
  padding:var(--section-padding) 0;
  background:var(--bg-surface);
  border-top:1px solid var(--border-color);
  border-bottom:1px solid var(--border-color);
}
.pricing-layout{
  display:grid;grid-template-columns:1fr 1.1fr 1fr;
  gap:24px;align-items:stretch;
  max-width:1000px;margin:0 auto;
}
.plan-card{
  background:var(--bg-page);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  padding:32px;
  display:flex;flex-direction:column;
  position:relative;
  transition:all var(--transition);
}
.plan-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.plan-card.featured{
  background:var(--bg-surface);
  border:2px solid var(--accent-500);
  box-shadow:0 12px 40px rgba(240,140,62,.15);
  padding:40px 32px;
  z-index:1;
}
.plan-badge{
  position:absolute;top:-12px;left:50%;transform:translateX(-50%);
  background:var(--accent-500);color:#fff;
  font-size:12px;font-weight:700;
  padding:4px 16px;border-radius:var(--radius-pill);
  letter-spacing:1px;
  box-shadow:0 4px 12px rgba(240,140,62,.3);
}
.plan-name{font-size:19px;font-weight:800;color:var(--text-900);margin-bottom:4px}
.plan-desc{font-size:13px;color:var(--text-400);margin-bottom:16px}
.plan-price{font-size:30px;font-weight:800;color:var(--text-900);margin-bottom:20px}
.plan-price small{font-size:14px;font-weight:400;color:var(--text-400)}
.plan-features{flex:1;margin-bottom:24px}
.plan-features li{
  font-size:14px;color:var(--text-600);
  padding:6px 0;padding-left:24px;position:relative;
}
.plan-features li::before{
  content:'✓';
  position:absolute;left:0;top:6px;
  color:var(--success);font-weight:700;font-size:14px;
}
.plan-card.featured .plan-features li::before{color:var(--accent-500)}
.plan-cta{width:100%}

/* ========== 最新信息 ========== */
.news{
  padding:var(--section-padding) 0;
  background:var(--bg-page);
}
.news-list{
  display:flex;flex-direction:column;gap:20px;
  max-width:960px;margin:0 auto;
}
.news-item{
  display:flex;gap:20px;
  background:var(--bg-surface);
  border-radius:var(--radius-lg);
  padding:18px;
  box-shadow:var(--shadow-sm);
  border:1px solid var(--border-color);
  transition:all var(--transition);
  align-items:center;
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:rgba(63,142,181,.2)}
.news-thumb{
  flex-shrink:0;width:200px;height:130px;
  border-radius:var(--radius-md);overflow:hidden;
  background:var(--brand-100);
}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-content{flex:1;min-width:0}
.news-cat{
  display:inline-block;
  padding:3px 10px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:12px;font-weight:600;
  border-radius:var(--radius-sm);
  margin-bottom:8px;
}
.news-content h3{font-size:17px;font-weight:700;margin-bottom:6px;line-height:1.4}
.news-content h3 a{color:var(--text-900)}
.news-content h3 a:hover{color:var(--brand-600)}
.news-content p{
  font-size:14px;color:var(--text-600);
  line-height:1.6;margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-meta{
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-400);
}
.news-meta a{
  color:var(--brand-600);font-weight:600;font-size:13px;
  display:inline-flex;align-items:center;gap:4px;
  transition:gap var(--transition),color var(--transition);
}
.news-meta a:hover{gap:8px;color:var(--brand-700)}
.news-more{
  display:flex;justify-content:center;margin-top:32px;
}
.empty-state{
  text-align:center;padding:60px 20px;color:var(--text-400);
  font-size:15px;
}
.empty-state .empty-icon{
  font-size:36px;margin-bottom:12px;opacity:.5;
}

/* ========== FAQ ========== */
.faq{
  padding:var(--section-padding) 0;
  background:var(--bg-surface);
  border-top:1px solid var(--border-color);
}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  background:var(--bg-page);
  border:1px solid var(--border-color);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:all var(--transition);
}
.faq-item.open{border-color:rgba(63,142,181,.25);box-shadow:var(--shadow-sm);background:var(--bg-surface)}
.faq-q{
  width:100%;text-align:left;
  padding:16px 20px;
  font-size:15px;font-weight:600;color:var(--text-900);
  display:flex;justify-content:space-between;align-items:center;
  cursor:pointer;background:transparent;
  min-height:52px;
  line-height:1.4;
}
.faq-q .faq-icon{
  flex-shrink:0;width:22px;height:22px;border-radius:50%;
  background:var(--brand-100);display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--brand-600);
  transition:transform .3s ease,background .3s ease,color .3s ease;
  margin-left:12px;
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--brand-500);color:#fff}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .35s ease,opacity .3s ease,padding .3s ease;
  opacity:0;paddding:0 20px;
}
.faq-item.open .faq-a{
  max-height:400px;opacity:1;
  padding:0 20px 18px;
}
.faq-a p{font-size:14px;color:var(--text-600);line-height:1.7}

/* ========== 尾部 CTA ========== */
.cta{
  padding:var(--section-padding) 0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  position:relative;
}
.cta::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(135deg,rgba(232,243,248,.95),rgba(255,255,255,.9));
}
.cta-inner{
  position:relative;z-index:1;
  max-width:680px;margin:0 auto;text-align:center;
  background:var(--bg-surface);
  border-radius:var(--radius-lg);
  padding:48px;
  box-shadow:var(--shadow-lg);
  border:1px solid var(--border-color);
}
.cta-inner h2{font-size:26px;font-weight:800;margin-bottom:10px;color:var(--text-900)}
.cta-inner p{font-size:15px;color:var(--text-600);margin-bottom:24px;line-height:1.7}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ========== 页脚 ========== */
.site-footer{
  background:var(--bg-footer);
  border-top:3px solid var(--brand-500);
  padding:60px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:40px;max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding);
}
.footer-brand .footer-logo{
  font-size:22px;font-weight:800;color:var(--text-900);
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
}
.footer-brand .footer-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--accent-500)}
.footer-brand p{font-size:14px;color:var(--text-600);line-height:1.7;max-width:300px}
.footer-col h4{
  font-size:15px;font-weight:700;color:var(--text-900);
  margin-bottom:16px;position:relative;padding-bottom:8px;
}
.footer-col h4::after{
  content:'';position:absolute;left:0;bottom:0;
  width:24px;height:2px;background:var(--brand-500);border-radius:2px;
}
.footer-col a{
  display:block;font-size:14px;color:var(--text-600);
  padding:4px 0;transition:all var(--transition);
}
.footer-col a:hover{color:var(--brand-600);padding-left:6px}
.footer-contact li{
  font-size:14px;color:var(--text-600);padding:4px 0;
  display:flex;align-items:center;gap:8px;
}
.footer-contact .icon{color:var(--brand-500);width:16px;text-align:center}
.footer-bottom{
  margin-top:48px;
  border-top:1px solid rgba(27,42,50,.06);
  padding:20px 0;
  text-align:center;
}
.footer-bottom .container{
  display:flex;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--text-400);flex-wrap:wrap;gap:8px;
}

/* ========== 响应式 ========== */
@media (max-width:1024px){
  :root{--section-padding:64px}
  .hero{padding:140px 0 80px}
  .hero h1{font-size:34px}
  .hero-grid{gap:40px}
  .features-layout{gap:32px}
  .pricing-layout{grid-template-columns:1fr;max-width:520px;gap:20px}
  .plan-card.featured{padding:32px}
}
@media (max-width:768px){
  :root{--container-padding:16px;--section-padding:48px}
  .main-nav,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .site-header{width:calc(100% - 32px);top:12px}
  .nav-inner{padding:8px 12px 8px 16px}
  .brand-logo{font-size:17px}
  .hero{padding:120px 0 64px}
  .hero h1{font-size:28px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-desc{font-size:15px}
  .hero-visual img{margin-top:8px}
  .hero-float-card{left:12px;bottom:-14px;padding:10px 16px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:20px}
  .stat-item:not(:last-child)::after{display:none}
  .stat-item:nth-child(2)::after{display:none}
  .features-layout{grid-template-columns:1fr}
  .scenario-scroll{grid-template-columns:1fr;overflow-x:auto;display:flex;gap:16px;padding-bottom:12px}
  .scenario-card{min-width:280px;flex-shrink:0}
  .cases-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .news-item{flex-direction:column;align-items:flex-start}
  .news-thumb{width:100%;height:160px}
  .cta-inner{padding:32px 20px}
  .footer-bottom .container{flex-direction:column;gap:4px}
  .section-head h2{font-size:24px}
}
@media (max-width:520px){
  .hero h1{font-size:24px}
  .hero-desc{font-size:14px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-num{font-size:24px}
  .footer-grid{grid-template-columns:1fr}
  .feature-row{padding:16px}
  .news-thumb{height:140px}
  .plan-card{padding:24px}
  .faq-q{font-size:14px;padding:14px 16px}
  .cta-btns{flex-direction:column}
  .cta-btns .btn{width:100%}
}

/* roulang page: article */
/* ========== 设计变量 ========== */
:root{
  --brand-500:#3F8EB5;
  --brand-600:#2F7898;
  --brand-700:#28688A;
  --brand-100:#E8F3F8;
  --accent-500:#F08C3E;
  --accent-600:#D97A28;
  --success:#2E9E63;
  --warning:#D9822B;
  --danger:#D64545;
  --text-900:#1B2A32;
  --text-600:#4B6270;
  --text-400:#8498A3;
  --bg-page:#F6F9FB;
  --bg-surface:#FFFFFF;
  --bg-footer:#EAF1F5;
  --dark-hud:#13242E;
  --radius-lg:16px;
  --radius-md:12px;
  --radius-sm:8px;
  --radius-pill:999px;
  --shadow-sm:0 6px 20px rgba(27,42,50,.06);
  --shadow-lg:0 12px 32px rgba(27,42,50,.10);
  --transition:.2s ease;
  --container:1200px;
  --font:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
}

/* ========== Reset / Base ========== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:var(--font);background:var(--bg-page);color:var(--text-900);line-height:1.7;-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--transition);}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
ul,ol{list-style:none;}
input,textarea{font-family:inherit;}

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

/* ========== 导航 ========== */
.site-header{position:fixed;top:16px;left:0;right:0;z-index:1000;display:flex;justify-content:center;pointer-events:none;}
.nav-inner{pointer-events:auto;display:flex;align-items:center;gap:24px;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);padding:12px 20px;border-radius:var(--radius-pill);box-shadow:0 4px 24px rgba(27,42,50,.08);max-width:1080px;width:calc(100% - 48px);}
.brand-logo{font-size:20px;font-weight:800;color:var(--text-900);display:flex;align-items:center;gap:8px;white-space:nowrap;letter-spacing:.5px;}
.brand-logo .dot{width:10px;height:10px;border-radius:50%;background:var(--brand-500);display:inline-block;box-shadow:0 0 0 4px var(--brand-100);flex-shrink:0;}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.main-nav a{padding:8px 16px;border-radius:var(--radius-pill);font-size:15px;font-weight:500;color:var(--text-600);transition:all var(--transition);}
.main-nav a:hover{color:var(--brand-600);background:var(--brand-100);}
.main-nav a.active{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.nav-cta{margin-left:8px;padding:10px 22px;font-size:14px;flex-shrink:0;}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:var(--radius-sm);margin-left:4px;flex-shrink:0;}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text-900);border-radius:2px;transition:all .3s ease;}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ========== 按钮 ========== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;border-radius:var(--radius-md);padding:12px 24px;transition:all var(--transition);border:2px solid transparent;line-height:1.4;}
.btn-accent{background:var(--accent-500);color:#fff;}
.btn-accent:hover{background:var(--accent-600);transform:translateY(-2px);box-shadow:0 8px 20px rgba(240,140,62,.28);color:#fff;}
.btn-accent:active{transform:scale(.98);}
.btn-outline{background:transparent;border-color:var(--brand-500);color:var(--brand-700);}
.btn-outline:hover{background:var(--brand-100);transform:translateY(-2px);box-shadow:0 6px 16px rgba(63,142,181,.15);}
.btn-outline:active{transform:scale(.98);}
.btn-white{background:#fff;color:var(--dark-hud);}
.btn-white:hover{background:var(--brand-100);transform:translateY(-2px);}
a.btn:focus,button:focus,input:focus{outline:2px solid rgba(63,142,181,.4);outline-offset:2px;}

/* ========== 页面主体 ========== */
main{display:block;}

/* 面包屑 */
.breadcrumb{padding:28px 0 4px;font-size:13px;color:var(--text-400);display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.breadcrumb a{color:var(--brand-600);transition:color var(--transition);}
.breadcrumb a:hover{color:var(--brand-500);text-decoration:underline;}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:var(--text-400);}

/* ========== 文章区域 ========== */
.article-page{padding-bottom:24px;}
.article-wrap{max-width:780px;margin:0 auto;padding:32px 0 56px;}
.article-header{margin-bottom:28px;}
.article-header h1{font-size:38px;line-height:1.35;font-weight:800;color:var(--text-900);margin-bottom:18px;letter-spacing:.5px;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px 14px;font-size:13px;color:var(--text-400);}
.article-meta .sep-dot{opacity:.5;}
.article-meta .cat-tag{background:var(--brand-100);color:var(--brand-700);padding:4px 12px;border-radius:var(--radius-sm);font-weight:600;font-size:12px;}
.article-cover{margin:24px 0 32px;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);background:var(--brand-100);display:flex;align-items:center;justify-content:center;min-height:280px;}
.article-cover img{width:100%;height:100%;object-fit:cover;}

/* ========== 正文阅读区 ========== */
.article-content{font-size:17px;line-height:1.8;color:var(--text-900);word-break:break-word;}
.article-content p{margin-bottom:24px;}
.article-content h2{font-size:28px;font-weight:700;margin:44px 0 16px;line-height:1.4;color:var(--text-900);}
.article-content h3{font-size:22px;font-weight:700;margin:34px 0 12px;line-height:1.4;}
.article-content ul,.article-content ol{margin-bottom:24px;padding-left:24px;}
.article-content ul{list-style:disc;}
.article-content ol{list-style:decimal;}
.article-content li{margin-bottom:8px;}
.article-content blockquote{border-left:4px solid var(--brand-500);background:#F0F5F8;padding:16px 20px;border-radius:var(--radius-sm);margin-bottom:24px;color:var(--text-600);font-size:16px;}
.article-content table{width:100%;border-collapse:collapse;margin-bottom:24px;border-radius:var(--radius-sm);overflow:hidden;border:var(--border);}
.article-content th{background:var(--brand-100);color:var(--brand-700);font-weight:600;padding:12px 16px;text-align:left;font-size:15px;}
.article-content td{padding:12px 16px;border-bottom:1px solid rgba(27,42,50,.06);font-size:15px;}
.article-content tr:last-child td{border-bottom:none;}
.article-content tr:hover td{background:rgba(63,142,181,.05);}
.article-content img{border-radius:var(--radius-md);margin-bottom:16px;}
.article-content pre{background:#F1F4F6;border-radius:var(--radius-sm);padding:16px 20px;overflow-x:auto;margin-bottom:24px;font-family:'Courier New',monospace;font-size:14px;}
.article-content code{background:#F1F4F6;border-radius:4px;padding:2px 6px;font-size:14px;font-family:'Courier New',monospace;}
.article-content pre code{background:transparent;padding:0;}
.article-content a{color:var(--brand-600);text-decoration:underline;}
.article-content a:hover{color:var(--brand-500);}

/* ========== 空态 ========== */
.article-empty{text-align:center;padding:90px 20px;background:var(--bg-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);}
.article-empty .empty-icon{font-size:48px;margin-bottom:16px;opacity:.5;}
.article-empty p{font-size:18px;color:var(--text-600);margin-bottom:24px;}
.article-empty .btn{margin-top:4px;}

/* ========== 文末信息 ========== */
.article-footer{margin-top:48px;padding-top:28px;border-top:var(--border);}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:28px;}
.article-tags a{background:var(--brand-100);color:var(--brand-700);font-size:12px;font-weight:600;padding:6px 14px;border-radius:var(--radius-sm);transition:all var(--transition);}
.article-tags a:hover{background:var(--brand-500);color:#fff;transform:translateY(-1px);}

/* ========== 相关推荐 ========== */
.related-section{max-width:960px;margin:0 auto 56px;}
.related-section .section-title{font-size:24px;font-weight:700;text-align:center;margin-bottom:36px;color:var(--text-900);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.related-card{background:var(--bg-surface);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);transition:all var(--transition);display:flex;flex-direction:column;}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.related-card .cover{aspect-ratio:16/9;overflow:hidden;background:var(--brand-100);position:relative;}
.related-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.related-card:hover .cover img{transform:scale(1.05);}
.related-card .info{padding:22px 20px;display:flex;flex-direction:column;flex:1;}
.related-card h3{font-size:17px;font-weight:600;margin-bottom:8px;line-height:1.45;color:var(--text-900);}
.related-card p{font-size:14px;color:var(--text-600);margin-bottom:14px;flex:1;line-height:1.6;}
.related-card .card-bottom{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--text-400);}
.related-card .card-bottom a{color:var(--brand-600);font-weight:600;font-size:13px;transition:all var(--transition);}
.related-card .card-bottom a:hover{gap:8px;color:var(--brand-500);}

/* 返回链接 */
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand-600);margin-top:20px;transition:all var(--transition);}
.back-link:hover{gap:12px;color:var(--brand-500);}
.back-link .arrow{font-size:16px;}

/* ========== CTA 区块 ========== */
.cta-darksection{max-width:1100px;margin:0 auto 80px;border-radius:24px;padding:56px 48px;position:relative;overflow:hidden;background:var(--dark-hud);text-align:center;}
.cta-darksection::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;opacity:.08;}
.cta-darksection .cta-inner{position:relative;z-index:1;}
.cta-darksection h2{font-size:28px;font-weight:700;color:#fff;margin-bottom:12px;line-height:1.4;}
.cta-darksection p{color:rgba(255,255,255,.75);margin-bottom:28px;font-size:15px;max-width:640px;margin-left:auto;margin-right:auto;}
.cta-darksection .btn-group{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* ========== 页脚 ========== */
.site-footer{background:var(--bg-footer);border-top:3px solid var(--brand-500);padding:64px 0 0;margin-top:24px;}
.footer-grid{max-width:var(--container);margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px;}
.footer-brand p{font-size:14px;color:var(--text-600);margin-top:16px;line-height:1.7;max-width:280px;}
.footer-logo{font-size:20px;font-weight:800;display:flex;align-items:center;gap:8px;color:var(--text-900);}
.footer-logo .dot{width:10px;height:10px;border-radius:50%;background:var(--brand-500);display:inline-block;box-shadow:0 0 0 4px rgba(63,142,181,.18);}
.footer-col h4{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text-900);position:relative;padding-bottom:10px;}
.footer-col h4::after{content:'';position:absolute;left:0;bottom:0;width:24px;height:3px;border-radius:2px;background:var(--brand-500);}
.footer-col a{display:block;font-size:14px;color:var(--text-600);margin-bottom:10px;transition:all var(--transition);}
.footer-col a:hover{color:var(--brand-600);padding-left:4px;}
.footer-contact li{font-size:14px;color:var(--text-600);margin-bottom:10px;display:flex;align-items:center;gap:8px;}
.footer-contact .icon{width:16px;text-align:center;font-size:13px;flex-shrink:0;}
.footer-bottom{border-top:1px solid rgba(27,42,50,.06);padding:20px 0;}
.footer-bottom .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--text-400);}

/* ========== 响应式 ========== */
@media (max-width:1024px){
  .nav-inner{gap:14px;padding:10px 16px;}
  .main-nav a{padding:8px 12px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .article-header h1{font-size:32px;}
}

@media (max-width:768px){
  .site-header{top:12px;}
  .nav-inner{gap:12px;padding:10px 14px;width:calc(100% - 32px);}
  .brand-logo{font-size:18px;}
  .nav-toggle{display:flex;}
  .main-nav{display:none;position:fixed;top:66px;left:16px;right:16px;background:var(--bg-surface);border-radius:var(--radius-lg);box-shadow:0 24px 48px rgba(27,42,50,.18);flex-direction:column;padding:16px 12px;gap:4px;margin-left:0;z-index:99;}
  .main-nav.open{display:flex;}
  .main-nav a{width:100%;text-align:center;padding:12px;font-size:15px;}
  .main-nav a:hover{background:var(--brand-100);}
  .nav-cta{display:none;}
  main{padding-top:88px;}
  .breadcrumb{padding-top:16px;font-size:12px;}
  .article-wrap{padding:24px 0 40px;}
  .article-header h1{font-size:26px;line-height:1.4;}
  .article-content{font-size:16px;line-height:1.75;}
  .article-content h2{font-size:22px;margin-bottom:12px;}
  .article-content h3{font-size:19px;}
  .related-grid{grid-template-columns:1fr;}
  .related-section{margin-bottom:40px;}
  .cta-darksection{padding:40px 24px;border-radius:16px;}
  .cta-darksection h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom .container{flex-direction:column;text-align:center;}
}

@media (max-width:520px){
  .container{padding:0 16px;}
  .nav-inner{border-radius:20px;}
  .related-card .info{padding:18px;}
  .article-cover{min-height:180px;}
}

/* roulang page: category1 */
:root {
            --brand-500: #3F8EB5;
            --brand-600: #2F7898;
            --brand-700: #28688A;
            --brand-100: #E8F3F8;
            --accent-500: #F08C3E;
            --accent-600: #D97A28;
            --text-900: #1B2A32;
            --text-600: #4B6270;
            --text-400: #8498A3;
            --bg-page: #F6F9FB;
            --bg-surface: #FFFFFF;
            --bg-footer: #EAF1F5;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 6px 20px rgba(27, 42, 50, .06);
            --shadow-hover: 0 12px 32px rgba(27, 42, 50, .10);
            --border-color: rgba(27, 42, 50, .08);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --container-width: 1200px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-page);
            color: var(--text-900);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 14px 28px;
            border-radius: var(--radius-md);
            transition: all .2s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-accent {
            background: var(--accent-500);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(240, 140, 62, .25);
        }
        .btn-accent:active {
            transform: scale(.98);
        }
        .btn-ghost {
            background: var(--brand-100);
            color: var(--brand-700);
            border-color: rgba(63, 142, 181, .2);
        }
        .btn-ghost:hover {
            background: #dcecf4;
            transform: translateY(-2px);
        }
        .btn-ghost:active {
            transform: scale(.98);
        }
        .btn-lg {
            padding: 16px 40px;
            font-size: 16px;
            border-radius: 14px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: calc(100% - 32px);
            max-width: 1180px;
            z-index: 1000;
            transition: top .3s ease;
        }
        .site-header.scrolled {
            top: 8px;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(255, 255, 255, .82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(27, 42, 50, .06);
            border-radius: 999px;
            padding: 10px 20px 10px 24px;
            box-shadow: 0 6px 24px rgba(27, 42, 50, .08);
            transition: box-shadow .3s ease, background .3s ease;
        }
        .site-header.scrolled .nav-inner {
            background: rgba(255, 255, 255, .92);
            box-shadow: 0 10px 32px rgba(27, 42, 50, .10);
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 19px;
            font-weight: 800;
            color: var(--text-900);
            letter-spacing: .5px;
            flex-shrink: 0;
        }
        .brand-logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-500);
            display: inline-block;
            box-shadow: 0 0 0 4px rgba(240, 140, 62, .18);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-600);
            padding: 8px 16px;
            border-radius: 999px;
            transition: all .2s ease;
        }
        .main-nav a:hover {
            color: var(--brand-600);
            background: rgba(63, 142, 181, .08);
        }
        .main-nav a.active {
            background: var(--brand-100);
            color: var(--brand-600);
            font-weight: 600;
        }
        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
            border-radius: 999px;
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            border-radius: 12px;
            background: transparent;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-900);
            border-radius: 2px;
            transition: all .3s 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);
        }

        /* ===== Hero ===== */
        .cat-hero {
            position: relative;
            padding: 170px 0 80px;
            background:
                linear-gradient(180deg, rgba(246, 249, 251, .94) 0%, rgba(232, 243, 248, .80) 55%, rgba(246, 249, 251, .96) 100%),
                url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            text-align: center;
            overflow: hidden;
        }
        .cat-hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
            margin: 0 auto;
            animation: fadeUp .6s ease both;
        }
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .8);
            border: 1px solid rgba(63, 142, 181, .2);
            color: var(--brand-600);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 999px;
            margin-bottom: 24px;
            box-shadow: 0 4px 14px rgba(63, 142, 181, .12);
        }
        .cat-hero h1 {
            font-size: 44px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text-900);
            letter-spacing: 1px;
        }
        .cat-hero h1 .highlight {
            color: var(--brand-500);
        }
        .hero-sub {
            margin: 20px auto 32px;
            font-size: 17px;
            color: var(--text-600);
            max-width: 640px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            position: relative;
            z-index: 2;
            margin-top: 56px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background: rgba(255, 255, 255, .78);
            border: 1px solid rgba(255, 255, 255, .85);
            border-radius: var(--radius-lg);
            padding: 24px 12px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            box-shadow: var(--shadow-card);
        }
        .stat-item {
            text-align: center;
            padding: 8px 16px;
            border-right: 1px solid rgba(27, 42, 50, .06);
        }
        .stat-item:last-child {
            border-right: none;
        }
        .stat-item strong {
            display: block;
            font-size: 26px;
            font-weight: 800;
            color: var(--brand-600);
            line-height: 1.2;
        }
        .stat-item span {
            font-size: 13px;
            color: var(--text-600);
            display: block;
            margin-top: 4px;
        }

        /* ===== Section Common ===== */
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-600);
            background: var(--brand-100);
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
            letter-spacing: .3px;
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-900);
            line-height: 1.35;
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-600);
            line-height: 1.7;
        }

        /* ===== Intro ===== */
        .cat-intro {
            padding: 80px 0 40px;
        }
        .intro-wrap {
            max-width: 880px;
            margin: 0 auto;
        }
        .intro-wrap .section-tag {
            display: inline-block;
            text-align: center;
        }
        .intro-head {
            text-align: center;
        }
        .intro-head h2 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .intro-text {
            font-size: 16px;
            color: var(--text-600);
            line-height: 1.85;
            text-align: left;
            margin-top: 28px;
        }
        .intro-text p {
            margin-bottom: 16px;
        }
        .intro-points {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-top: 32px;
            text-align: left;
        }
        .intro-point {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-card);
        }
        .intro-point:last-child {
            grid-column: 1 / -1;
        }
        .intro-point strong {
            display: block;
            color: var(--text-900);
            margin-bottom: 6px;
            font-size: 15px;
        }
        .intro-point span {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.7;
        }

        /* ===== Entry Types ===== */
        .entry-types {
            padding: 60px 0 80px;
        }
        .entry-layout {
            display: grid;
            grid-template-columns: 1.05fr .95fr;
            gap: 32px;
            align-items: stretch;
        }
        .entry-items {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .entry-item {
            display: flex;
            gap: 18px;
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .entry-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .entry-icon {
            font-size: 24px;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--brand-100);
            border-radius: var(--radius-md);
            flex-shrink: 0;
        }
        .entry-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .entry-item p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.7;
        }
        .entry-visual {
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .entry-visual img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .entry-visual-body {
            padding: 24px;
        }
        .entry-visual-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .entry-visual-body p {
            font-size: 14px;
            color: var(--text-600);
            margin-bottom: 14px;
        }
        .entry-visual-body ul li {
            position: relative;
            padding-left: 20px;
            font-size: 14px;
            color: var(--text-600);
            margin-bottom: 8px;
        }
        .entry-visual-body ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 9px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--brand-500);
        }

        /* ===== Process ===== */
        .login-process {
            background: var(--bg-surface);
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .process-step {
            position: relative;
            background: var(--bg-page);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: center;
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--brand-500);
            color: #fff;
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .process-step h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-600);
            line-height: 1.7;
        }

        /* ===== Scenes ===== */
        .usage-scenes {
            padding: 80px 0;
        }
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scene-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .scene-body {
            padding: 24px;
        }
        .scene-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .scene-body p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.75;
        }
        .scene-banner {
            grid-column: 1 / -1;
            display: flex;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .scene-banner:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scene-banner img {
            width: 40%;
            height: auto;
            object-fit: cover;
        }
        .scene-banner .scene-body {
            flex: 1;
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .scene-banner h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }
        .scene-banner p {
            max-width: 520px;
        }

        /* ===== Rec Cards ===== */
        .rec-cards {
            background: var(--bg-surface);
            padding: 80px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .rec-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            grid-template-areas:
                "featured card2"
                "featured card3";
            gap: 24px;
        }
        .rec-card {
            background: var(--bg-page);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .2s ease, box-shadow .2s ease;
        }
        .rec-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .rec-featured {
            grid-area: featured;
            display: flex;
            flex-direction: column;
        }
        .rec-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .rec-featured img {
            flex: 1;
            min-height: 380px;
        }
        .rec-body {
            padding: 24px;
        }
        .rec-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--brand-700);
            background: var(--brand-100);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
        }
        .rec-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .rec-body p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.75;
            margin-bottom: 16px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-600);
            transition: gap .2s ease, color .2s ease;
        }
        .text-link:hover {
            color: var(--brand-700);
            gap: 10px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: box-shadow .2s ease;
        }
        .faq-item.active {
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-900);
            text-align: left;
            background: transparent;
            transition: color .2s ease;
        }
        .faq-question:hover {
            color: var(--brand-600);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--brand-100);
            color: var(--brand-600);
            font-size: 18px;
            font-weight: 400;
            transition: transform .25s ease, background .2s ease;
        }
        .faq-icon::before {
            content: "+";
            line-height: 1;
        }
        .faq-item.active .faq-icon {
            transform: rotate(135deg);
            background: var(--brand-500);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .25s ease;
        }
        .faq-answer p {
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
        }
        .cta-box {
            position: relative;
            background:
                linear-gradient(135deg, rgba(232, 243, 248, .96), rgba(246, 249, 251, .98)),
                url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-radius: 24px;
            padding: 64px 48px;
            text-align: center;
            overflow: hidden;
            border: 1px solid rgba(63, 142, 181, .15);
        }
        .cta-badge {
            display: inline-block;
            background: var(--accent-500);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 18px;
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-900);
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-600);
            margin-bottom: 32px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            border-top: 3px solid var(--brand-500);
            padding-top: 64px;
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px 48px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
        }
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-900);
            margin-bottom: 14px;
        }
        .footer-logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-500);
            box-shadow: 0 0 0 4px rgba(240, 140, 62, .18);
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-900);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-600);
            padding: 6px 0;
            transition: color .2s ease, padding-left .2s ease;
        }
        .footer-col a:hover {
            color: var(--brand-600);
            padding-left: 4px;
        }
        .footer-contact li {
            font-size: 14px;
            color: var(--text-600);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
        }
        .footer-contact .icon {
            color: var(--brand-500);
            font-style: normal;
        }
        .footer-bottom {
            border-top: 1px solid rgba(27, 42, 50, .08);
            padding: 18px 0;
            background: rgba(255, 255, 255, .35);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-400);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .entry-layout {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .rec-grid {
                grid-template-columns: 1fr 1fr;
                grid-template-areas:
                    "featured featured"
                    "card2 card3";
            }
            .rec-featured {
                flex-direction: row;
            }
            .rec-featured img {
                width: 45%;
                height: auto;
                min-height: 0;
                flex: none;
            }
            .rec-featured .rec-body {
                display: flex;
                flex-direction: column;
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .site-header {
                top: 12px;
                width: calc(100% - 20px);
            }
            .nav-inner {
                padding: 8px 12px 8px 18px;
                border-radius: 999px;
            }
            .main-nav {
                position: fixed;
                top: 0;
                right: -110%;
                width: 78%;
                max-width: 320px;
                height: 100vh;
                background: var(--bg-surface);
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 90px 28px 24px;
                border-radius: 20px 0 0 20px;
                box-shadow: -12px 0 40px rgba(27, 42, 50, .12);
                transition: right .35s ease;
                z-index: 998;
            }
            .main-nav.open {
                right: 0;
            }
            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .cat-hero {
                padding: 140px 0 64px;
            }
            .cat-hero h1 {
                font-size: 30px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px 0;
                margin-top: 40px;
                padding: 20px 8px;
            }
            .stat-item:nth-child(2) {
                border-right: none;
            }
            .stat-item:nth-child(1),
            .stat-item:nth-child(2) {
                border-bottom: 1px solid rgba(27, 42, 50, .06);
                padding-bottom: 16px;
                margin-bottom: 8px;
            }
            .stat-item strong {
                font-size: 24px;
            }
            .cat-intro {
                padding: 48px 0 32px;
            }
            .entry-types {
                padding: 48px 0;
            }
            .usage-scenes {
                padding: 48px 0;
            }
            .faq-section {
                padding: 48px 0;
            }
            .cta-section {
                padding: 48px 0;
            }
            .login-process,
            .rec-cards {
                padding: 48px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .intro-points {
                grid-template-columns: 1fr;
            }
            .intro-point:last-child {
                grid-column: auto;
            }
            .entry-item {
                padding: 20px;
            }
            .entry-visual img {
                height: 180px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scene-banner {
                flex-direction: column;
            }
            .scene-banner img {
                width: 100%;
                height: 180px;
                object-fit: cover;
            }
            .scene-banner .scene-body {
                padding: 24px;
            }
            .rec-grid {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "featured"
                    "card2"
                    "card3";
                gap: 16px;
            }
            .rec-featured {
                flex-direction: column;
            }
            .rec-featured img {
                width: 100%;
                height: 220px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding: 0 24px 32px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .btn-lg {
                width: 100%;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
            }
            .stat-item strong {
                font-size: 22px;
            }
            .entry-item {
                flex-direction: column;
                gap: 12px;
            }
            .entry-icon {
                width: 44px;
                height: 44px;
            }
            .process-step {
                padding: 24px 16px;
            }
            .scene-card img {
                height: 180px;
            }
            .rec-body {
                padding: 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 14px;
            }
            .faq-answer p {
                padding: 0 18px 18px;
                font-size: 14px;
            }
            .cta-box {
                border-radius: 16px;
                padding: 32px 20px;
            }
        }

/* roulang page: category2 */
:root {
  --brand-500: #3F8EB5;
  --brand-600: #2F7898;
  --brand-700: #28688A;
  --brand-100: #E8F3F8;
  --accent-500: #F08C3E;
  --accent-600: #D97A28;
  --success: #2E9E63;
  --warning: #D9822B;
  --error: #D64545;
  --text-900: #1B2A32;
  --text-600: #4B6270;
  --text-400: #8498A3;
  --bg-page: #F6F9FB;
  --bg-surface: #FFFFFF;
  --bg-footer: #EAF1F5;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 6px 20px rgba(27,42,50,.06);
  --shadow-hover: 0 12px 32px rgba(27,42,50,.10);
  --border: 1px solid rgba(27,42,50,.08);
  --border-light: 1px solid rgba(27,42,50,.06);
  --transition: .2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-900);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand-500); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--brand-600); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 880px; margin: 0 auto; }
.section { padding: 80px 0; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  transition: var(--transition);
  cursor: pointer;
}
.btn-accent { background: var(--accent-500); color: #fff; box-shadow: 0 4px 14px rgba(240,140,62,.28); }
.btn-accent:hover { background: var(--accent-600); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(240,140,62,.34); color: #fff; }
.btn-accent:active { transform: scale(.98); }
.btn-outline { background: transparent; color: var(--brand-700); border: 1px solid var(--brand-500); }
.btn-outline:hover { background: var(--brand-100); color: var(--brand-700); transform: translateY(-2px); }
.btn-outline:active { transform: scale(.98); }

/* 导航 */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  padding: 16px 24px;
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(27,42,50,.06);
  border-radius: 999px;
  padding: 10px 20px;
}
.site-header .nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 800; color: var(--text-900);
  white-space: nowrap;
}
.brand-logo .dot, .footer-logo .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent-500);
  display: inline-block;
  box-shadow: 0 0 0 4px rgba(240,140,62,.18);
}
.brand-logo:hover { color: var(--brand-600); }
.main-nav { display: flex; align-items: center; gap: 8px; }
.main-nav a {
  display: inline-block; padding: 8px 16px;
  font-size: 15px; font-weight: 500;
  color: var(--text-600);
  border-radius: 999px;
  transition: var(--transition);
}
.main-nav a:hover { color: var(--brand-600); background: rgba(63,142,181,.08); }
.main-nav a.active { background: var(--brand-100); color: var(--brand-700); font-weight: 600; }
.nav-cta { padding: 10px 20px; font-size: 14px; border-radius: 999px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-900); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 分类 Hero */
.page-hero {
  position: relative;
  padding: 160px 0 72px;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  text-align: center;
}
.page-hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,.72) 0%, rgba(246,249,251,.62) 100%);
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--text-400);
  background: rgba(255,255,255,.7);
  padding: 6px 16px; border-radius: 999px;
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-400); }
.breadcrumb a:hover { color: var(--brand-500); }
.breadcrumb .sep { color: var(--text-400); opacity: .6; }
.page-hero h1 {
  font-size: 42px; font-weight: 800; line-height: 1.3;
  color: var(--text-900);
  margin: 0 auto 16px;
  max-width: 740px;
}
.page-hero h1 strong { color: var(--brand-500); font-weight: 800; }
.page-hero .hero-desc {
  font-size: 17px; color: var(--text-600);
  max-width: 640px; margin: 0 auto 32px;
  line-height: 1.8;
}
.page-hero .hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* 分类简介 */
.intro-section { padding-top: 64px; }
.section-tag {
  display: inline-block;
  font-size: 13px; font-weight: 600;
  color: var(--brand-700);
  background: var(--brand-100);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.intro-section h2 {
  font-size: 30px; font-weight: 700; line-height: 1.35;
  color: var(--text-900);
  margin-bottom: 20px;
}
.intro-section p { font-size: 16px; color: var(--text-600); margin-bottom: 16px; line-height: 1.8; }
.intro-points { margin: 24px 0 16px; }
.intro-points li {
  position: relative;
  padding-left: 28px;
  font-size: 15px; color: var(--text-600);
  margin-bottom: 12px;
  line-height: 1.7;
}
.intro-points li::before {
  content: '✓';
  position: absolute; left: 0; top: 0;
  width: 20px; height: 20px;
  background: var(--brand-100);
  color: var(--brand-700);
  border-radius: 50%;
  font-size: 11px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  line-height: 1;
}
.intro-guide {
  font-size: 15px; color: var(--text-600);
  background: var(--brand-100);
  border-left: 4px solid var(--brand-500);
  padding: 16px 20px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-top: 24px;
}

/* 安全能力卡片 */
.capability-section { padding-top: 0; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.section-head h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; color: var(--text-900); }
.section-head p { font-size: 16px; color: var(--text-600); line-height: 1.7; }
.capability-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
}
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: var(--border);
  transition: var(--transition);
  overflow: hidden;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card img { width: 100%; object-fit: cover; }
.card-body { padding: 24px; }
.card-body h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--text-900); }
.card-body p { font-size: 14px; color: var(--text-600); line-height: 1.75; margin-bottom: 12px; }
.card-body ul li {
  position: relative; padding-left: 20px;
  font-size: 14px; color: var(--text-600); margin-bottom: 8px; line-height: 1.6;
}
.card-body ul li::before { content: '›'; position: absolute; left: 4px; top: 0; color: var(--brand-500); font-size: 18px; font-weight: 700; }
.capability-grid .card-large { grid-row: span 2; display: flex; flex-direction: column; }
.capability-grid .card-large img { height: 220px; }
.capability-grid .card-large .card-body { flex: 1; padding: 28px; }
.capability-grid .card-small img { height: 150px; }
.capability-grid .card-wide { grid-column: 1 / -1; display: flex; align-items: center; gap: 24px; }
.capability-grid .card-wide img { width: 240px; height: 160px; flex-shrink: 0; object-fit: cover; }
.capability-grid .card-wide .card-body { flex: 1; padding: 24px 24px 24px 0; }
.capability-grid .card-wide .card-body h3 { margin-bottom: 8px; }
.badge {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--brand-100);
  color: var(--brand-700);
  margin-bottom: 10px;
}
.badge-accent { background: var(--accent-500); color: #fff; }

/* 安全流程 */
.process-section { background: var(--brand-100); }
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-item {
  position: relative;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  text-align: left;
}
.process-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.process-num {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-500);
  color: #fff;
  font-size: 18px; font-weight: 700;
  border-radius: 50%;
  margin-bottom: 16px;
  box-shadow: 0 4px 12px rgba(63,142,181,.28);
}
.process-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; color: var(--text-900); }
.process-item p { font-size: 14px; color: var(--text-600); line-height: 1.65; }

/* 指标条 */
.metrics-strip {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 32px 0;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.metric-item { text-align: center; padding: 16px; }
.metric-item .metric-num {
  font-size: 30px; font-weight: 800;
  color: var(--brand-500);
  line-height: 1.2;
  margin-bottom: 6px;
}
.metric-item .metric-label { font-size: 13px; color: var(--text-600); }

/* 相关服务入口 */
.related-section { padding-top: 0; }
.related-list { max-width: 880px; margin: 0 auto; }
.related-link {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 24px 28px;
  background: var(--bg-surface);
  border: var(--border);
  border-bottom: 1px solid var(--brand-100);
  border-radius: var(--radius-md);
  font-size: 17px; font-weight: 600; color: var(--text-900);
  transition: var(--transition);
  margin-bottom: 16px;
}
.related-link .arrow { transition: transform var(--transition); color: var(--brand-500); font-size: 22px; }
.related-link:hover { background: var(--brand-100); color: var(--brand-700); transform: translateX(8px); }
.related-link:hover .arrow { transform: translateX(4px); }

/* FAQ */
.faq-section { background: var(--bg-surface); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-surface);
  border: var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: rgba(63,142,181,.28); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px;
  font-size: 15px; font-weight: 600; color: var(--text-900);
  cursor: pointer;
  user-select: none;
}
.faq-q .icon {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--brand-100); color: var(--brand-700);
  font-size: 18px;
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-q .icon { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease;
  color: var(--text-600);
  font-size: 14px;
  line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 360px; }
.faq-a .inner { padding: 0 24px 20px; }

/* CTA */
.cta-section {
  background: var(--brand-100);
  text-align: center;
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center;
  opacity: .08;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 {
  font-size: 30px; font-weight: 700;
  color: var(--text-900);
  margin-bottom: 12px;
}
.cta-section p { font-size: 16px; color: var(--text-600); margin-bottom: 28px; }

/* 页脚 */
.site-footer { background: var(--bg-footer); border-top: 3px solid var(--brand-500); }
.footer-grid {
  max-width: 1200px; margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 64px 24px 32px;
}
.footer-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 22px; font-weight: 800; color: var(--text-900);
  margin-bottom: 14px;
}
.footer-brand p { font-size: 14px; color: var(--text-600); line-height: 1.7; max-width: 340px; }
.footer-col h4 {
  font-size: 16px; font-weight: 700;
  color: var(--text-900);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px; color: var(--text-600);
  margin-bottom: 10px;
  position: relative;
}
.footer-col a::after {
  content: '';
  position: absolute; left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--brand-500);
  transition: width var(--transition);
}
.footer-col a:hover { color: var(--brand-500); }
.footer-col a:hover::after { width: 100%; }
.footer-contact li {
  font-size: 14px; color: var(--text-600);
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 8px;
}
.footer-contact .icon { color: var(--brand-500); font-style: normal; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 24px;
  font-size: 13px; color: var(--text-400);
  text-align: center;
}
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* 移动端 */
@media (max-width: 1024px) {
  .capability-grid { grid-template-columns: 1fr; }
  .capability-grid .card-large { grid-row: auto; }
  .capability-grid .card-large img { height: 200px; }
  .capability-grid .card-wide { flex-direction: column; align-items: flex-start; }
  .capability-grid .card-wide img { width: 100%; height: 180px; }
  .capability-grid .card-wide .card-body { padding: 0 24px 24px; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 48px 0; }
  .site-header { padding: 12px 16px; }
  .site-header.scrolled { border-radius: 24px; }
  .nav-inner { gap: 12px; }
  .main-nav {
    position: fixed; top: 0; right: 0; width: 280px; height: 100vh;
    background: var(--bg-surface);
    flex-direction: column;
    align-items: flex-start;
    padding: 88px 24px 32px;
    gap: 8px;
    box-shadow: -8px 0 32px rgba(27,42,50,.1);
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 99;
    border-radius: 0;
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { width: 100%; padding: 12px 16px; font-size: 16px; }
  .nav-toggle { display: flex; z-index: 100; }
  .nav-cta { display: none; }
  .page-hero { padding: 130px 0 48px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero .hero-desc { font-size: 15px; }
  .intro-section h2, .section-head h2, .cta-section h2 { font-size: 24px; }
  .process-grid { grid-template-columns: 1fr; }
  .metric-item .metric-num { font-size: 26px; }
  .related-link { font-size: 15px; padding: 18px 20px; }
  .faq-q { font-size: 14px; padding: 14px 18px; }
  .faq-a .inner { padding: 0 18px 16px; }
  .cta-section .btn { width: 100%; max-width: 320px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .brand-logo { font-size: 17px; }
  .btn { padding: 12px 20px; font-size: 14px; }
  .page-hero h1 { font-size: 25px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 280px; }
  .metrics-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .capability-grid .card-small img { height: 130px; }
  .card-body { padding: 18px; }
}

/* 焦点状态 */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --brand-500: #3F8EB5;
            --brand-600: #2F7898;
            --brand-700: #28688A;
            --brand-100: #E8F3F8;
            --accent-500: #F08C3E;
            --accent-600: #D97A28;
            --success: #2E9E63;
            --warning: #D9822B;
            --error: #D64545;
            --text-900: #1B2A32;
            --text-600: #4B6270;
            --text-400: #8498A3;
            --text-white: #FFFFFF;
            --bg-page: #F6F9FB;
            --bg-surface: #FFFFFF;
            --bg-footer: #EAF1F5;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 6px 20px rgba(27, 42, 50, .06);
            --shadow-hover: 0 12px 32px rgba(27, 42, 50, .10);
            --shadow-accent: 0 8px 24px rgba(240, 140, 62, .25);
            --border-light: 1px solid rgba(27, 42, 50, .08);
            --border-divider: 1px solid rgba(27, 42, 50, .06);
            --container: 1200px;
            --gap: 24px;
            --transition: 0.2s ease;
            --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-900);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
        }

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

        /* ===== 板块标题 ===== */
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-block;
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
            letter-spacing: .5px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-900);
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-600);
            line-height: 1.7;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 13px 28px;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            transition: all var(--transition);
            border: 1.5px solid transparent;
            gap: 8px;
        }
        .btn-accent {
            background: var(--accent-500);
            color: var(--text-white);
            box-shadow: var(--shadow-accent);
        }
        .btn-accent:hover {
            background: var(--accent-600);
            transform: translateY(-2px);
        }
        .btn-accent:active {
            transform: scale(.98);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--brand-500);
            color: var(--brand-600);
        }
        .btn-outline:hover {
            background: var(--brand-100);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: scale(.98);
        }
        .btn-white {
            background: var(--text-white);
            color: var(--brand-700);
            box-shadow: 0 4px 16px rgba(27, 42, 50, .10);
        }
        .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(27, 42, 50, .14);
        }
        .btn-white:active {
            transform: scale(.98);
        }
        .btn-block {
            width: 100%;
            justify-content: center;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
        }

        /* ===== 头部导航 ===== */
        .site-header {
            position: fixed;
            top: 20px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            padding: 0 24px;
            transition: top var(--transition);
        }
        .site-header.scrolled {
            top: 12px;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            gap: 32px;
            background: transparent;
            border-radius: var(--radius-pill);
            padding: 10px 12px 10px 24px;
            max-width: var(--container);
            width: 100%;
            transition: background var(--transition), box-shadow var(--transition), border var(--transition);
            border: 1px solid transparent;
        }
        .site-header.scrolled .nav-inner {
            background: rgba(255, 255, 255, .85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-card);
            border: var(--border-light);
        }

        .brand-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-900);
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            letter-spacing: .3px;
        }
        .brand-logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-500);
            flex-shrink: 0;
            display: inline-block;
            box-shadow: 0 0 0 4px rgba(240, 140, 62, .18);
        }

        .main-nav {
            display: flex;
            gap: 4px;
            margin: 0 auto;
        }
        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-600);
            transition: all var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            color: var(--brand-600);
            background: rgba(63, 142, 181, .06);
        }
        .main-nav a.active {
            color: var(--brand-600);
            background: var(--brand-100);
            font-weight: 600;
        }

        .nav-cta {
            flex-shrink: 0;
            padding: 10px 22px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: var(--brand-100);
            transition: all var(--transition);
        }
        .nav-toggle:hover {
            background: var(--brand-100);
        }
        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--text-900);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 160px 0 100px;
            overflow: hidden;
            min-height: 620px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(246, 249, 251, .95) 0%, rgba(246, 249, 251, .88) 40%, rgba(63, 142, 181, .18) 100%);
        }
        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .hero-content {
            padding: 24px 0;
        }
        .hero-badge {
            display: inline-block;
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            margin-bottom: 24px;
            letter-spacing: .5px;
        }
        .hero-content h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-900);
            margin-bottom: 20px;
        }
        .hero-content h1 span {
            color: var(--brand-500);
            position: relative;
        }
        .hero-desc {
            font-size: 17px;
            color: var(--text-600);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-img {
            width: 100%;
            max-width: 460px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            object-fit: cover;
            aspect-ratio: 4/3;
            border: 4px solid rgba(255, 255, 255, .6);
        }
        .hero-card {
            position: absolute;
            bottom: -16px;
            left: -20px;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-hover);
            padding: 16px 24px;
            display: flex;
            align-items: center;
            gap: 14px;
            border: var(--border-light);
        }
        .hero-card-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .hero-card strong {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-900);
            display: block;
            line-height: 1.4;
        }
        .hero-card span {
            font-size: 13px;
            color: var(--text-400);
            display: block;
        }

        /* ===== 数据信任条 ===== */
        .stats {
            padding: 48px 0;
            background: var(--bg-surface);
            border-bottom: var(--border-divider);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
        }
        .stat-item {
            text-align: center;
            padding: 16px 24px;
            position: relative;
        }
        .stat-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 48px;
            background: var(--border-divider);
        }
        .stat-num {
            font-size: 30px;
            font-weight: 800;
            color: var(--brand-600);
            line-height: 1.3;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-600);
        }

        /* ===== 功能模块 ===== */
        .features {
            padding: 80px 0;
            background: var(--bg-page);
        }
        .features-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: stretch;
        }
        .features-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .feature-item {
            display: flex;
            gap: 20px;
            padding: 24px 16px;
            border-bottom: var(--border-divider);
            transition: all var(--transition);
            border-radius: var(--radius-md);
        }
        .feature-item:last-child {
            border-bottom: none;
        }
        .feature-item:hover {
            background: var(--bg-surface);
            box-shadow: var(--shadow-card);
            padding-left: 24px;
            border-radius: var(--radius-md);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
            transition: all var(--transition);
        }
        .feature-item:hover .feature-icon {
            background: var(--brand-500);
            color: var(--text-white);
        }
        .feature-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-900);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.6;
        }
        .features-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            position: relative;
            min-height: 420px;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: flex-end;
        }
        .features-visual img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .features-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(27, 42, 50, .75) 100%);
        }
        .features-visual-text {
            position: relative;
            z-index: 1;
            padding: 32px;
            color: var(--text-white);
        }
        .features-visual-text h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .features-visual-text p {
            font-size: 15px;
            opacity: .9;
        }

        /* ===== 流程路径 ===== */
        .process {
            padding: 80px 0;
            background: var(--bg-surface);
            border-top: var(--border-divider);
            border-bottom: var(--border-divider);
        }
        .process-steps {
            display: flex;
            align-items: flex-start;
            justify-content: center;
            gap: 0;
            max-width: 900px;
            margin: 0 auto;
        }
        .process-step {
            flex: 1;
            text-align: center;
            padding: 32px 24px;
            position: relative;
            transition: all var(--transition);
        }
        .process-step:hover {
            background: var(--brand-100);
            border-radius: var(--radius-lg);
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--brand-500);
            color: var(--text-white);
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 6px 16px rgba(63, 142, 181, .3);
            position: relative;
            z-index: 1;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-900);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.6;
            max-width: 240px;
            margin: 0 auto;
        }
        .process-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            padding-top: 72px;
            color: var(--brand-400, #A0C4D8);
            font-size: 24px;
            font-weight: 300;
            flex-shrink: 0;
        }
        .process-arrow i {
            font-size: 26px;
            color: var(--brand-500);
        }

        /* ===== 适用场景 ===== */
        .scenarios {
            padding: 80px 0;
            background: var(--bg-page);
            overflow: hidden;
        }
        .scenarios-scroll {
            display: flex;
            gap: var(--gap);
            overflow-x: auto;
            padding: 8px 4px 24px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .scenarios-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .scenarios-scroll::-webkit-scrollbar-track {
            background: var(--brand-100);
            border-radius: 999px;
        }
        .scenarios-scroll::-webkit-scrollbar-thumb {
            background: var(--brand-500);
            border-radius: 999px;
        }
        .scenario-card {
            flex: 0 0 calc((100% - 48px) / 3);
            scroll-snap-align: start;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scenario-card img {
            aspect-ratio: 16/9;
            object-fit: cover;
            width: 100%;
        }
        .scenario-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .scenario-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-900);
            margin-bottom: 8px;
        }
        .scenario-body p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .scenario-body a {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand-600);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .scenario-body a:hover {
            gap: 10px;
            color: var(--brand-700);
        }

        /* ===== FAQ ===== */
        .faq {
            padding: 80px 0;
            background: var(--bg-surface);
            border-top: var(--border-divider);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            border: var(--border-light);
            border-radius: var(--radius-lg);
            background: var(--bg-surface);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card);
            border-color: rgba(63, 142, 181, .2);
        }
        .faq-item.active {
            box-shadow: var(--shadow-card);
            border-color: var(--brand-500);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            min-height: 56px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-900);
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--brand-100);
        }
        .faq-question i {
            color: var(--text-400);
            transition: transform var(--transition);
            flex-shrink: 0;
            font-size: 14px;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--brand-500);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.25s ease, padding 0.25s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.7;
            padding-top: 4px;
            border-top: var(--border-divider);
        }

        /* ===== CTA ===== */
        .cta {
            padding: 80px 0;
            background: var(--brand-100);
            position: relative;
            overflow: hidden;
        }
        .cta-box {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 48px;
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: var(--border-light);
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-900);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-box p {
            font-size: 16px;
            color: var(--text-600);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-box .btn {
            font-size: 16px;
            padding: 14px 36px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            padding-top: 64px;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--brand-500), var(--accent-500));
        }
        .footer-grid {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px 48px;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
        }
        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-900);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-500);
            display: inline-block;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-600);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-900);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent-500);
            border-radius: 2px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-600);
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--brand-600);
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-600);
            padding: 6px 0;
        }
        .footer-contact .icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--brand-100);
            color: var(--brand-600);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: var(--border-divider);
            padding: 20px 0;
        }
        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--text-400);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero-content h1 {
                font-size: 34px;
            }
            .features-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .scenario-card {
                flex-basis: calc((100% - 24px) / 2);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .process-steps {
                flex-wrap: wrap;
                gap: 16px;
            }
            .process-step {
                flex: 1 1 200px;
            }
            .process-arrow {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
                padding: 0 12px;
            }
            .nav-inner {
                border-radius: 14px;
                padding: 8px 12px;
                gap: 16px;
                background: rgba(255, 255, 255, .88);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                box-shadow: var(--shadow-card);
                border: var(--border-light);
            }
            .site-header:not(.scrolled) .nav-inner {
                background: rgba(255, 255, 255, .88);
                box-shadow: var(--shadow-card);
                border: var(--border-light);
            }
            .brand-logo {
                font-size: 17px;
            }
            .main-nav {
                display: none;
                position: fixed;
                top: 76px;
                left: 12px;
                right: 12px;
                flex-direction: column;
                background: var(--bg-surface);
                border-radius: var(--radius-lg);
                padding: 16px;
                box-shadow: var(--shadow-hover);
                gap: 4px;
                border: var(--border-light);
                z-index: 100;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                border-radius: var(--radius-md);
                font-size: 16px;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }

            .hero {
                padding: 120px 0 64px;
                min-height: auto;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-visual {
                order: -1;
                margin-bottom: 16px;
            }
            .hero-img {
                max-width: 100%;
            }
            .hero-card {
                left: 12px;
                bottom: -12px;
                padding: 12px 16px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px 0;
            }
            .stat-item:nth-child(2)::after {
                display: none;
            }

            .features {
                padding: 48px 0;
            }
            .features-wrapper {
                gap: 24px;
            }
            .feature-item {
                padding: 16px 12px;
            }

            .process {
                padding: 48px 0;
            }
            .process-steps {
                flex-direction: column;
                gap: 0;
            }
            .process-step {
                padding: 24px 16px;
                text-align: center;
            }
            .process-arrow {
                display: block;
                padding: 0;
                text-align: center;
                transform: rotate(90deg);
            }
            .process-arrow i {
                font-size: 18px;
            }

            .scenarios {
                padding: 48px 0;
            }
            .scenario-card {
                flex-basis: 84%;
            }

            .faq {
                padding: 48px 0;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
                min-height: 52px;
            }
            .faq-answer p {
                font-size: 13px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }

            .cta {
                padding: 48px 0;
            }
            .cta-box {
                padding: 32px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-box p {
                font-size: 15px;
            }
            .cta-box .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header p {
                font-size: 15px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-num {
                font-size: 24px;
            }
            .scenario-card {
                flex-basis: 100%;
            }
            .hero {
                padding: 104px 0 48px;
            }
            .hero-content h1 {
                font-size: 26px;
            }
        }

        /* ===== 无障碍焦点 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--brand-500);
            outline-offset: 2px;
            border-radius: 4px;
        }