/* roulang page: index */
:root {
  --bg-main: #F3F8FC;
  --bg-card: #FFFFFF;
  --bg-soft: #EAF2F9;
  --primary-dark: #0B2B4D;
  --accent-neon: #00E5FF;
  --accent-neon-hover: #38EAFF;
  --accent-amber: #F5A623;
  --text-body: #33475B;
  --text-muted: #8FA3B6;
  --border-light: #C9D8E5;
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-input: 10px;
  --radius-img: 12px;
  --shadow-card: 0 2px 10px rgba(11,43,77,0.08);
  --shadow-hover: 0 8px 24px rgba(11,43,77,0.14);
  --nav-bg: #0A1F33;
  --nav-link: #B7C6D6;
  --footer-bg: #07182A;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --section-space: 80px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-family);background:var(--bg-main);color:var(--text-body);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
h1,h2,h3,h4,h5,h6{color:var(--primary-dark);font-weight:900;line-height:1.35}
h1{font-size:42px}
h2{font-size:32px}
h3{font-size:22px;font-weight:700}
h4{font-size:18px;font-weight:700}
p{line-height:1.8}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--section-space) 0}
.section-alt{background:var(--bg-soft)}
.text-muted{color:var(--text-muted);font-size:14px}
.primary-color{color:var(--primary-dark)}
.neon-color{color:var(--accent-neon)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 28px;border-radius:var(--radius-btn);font-size:16px;font-weight:700;border:none;cursor:pointer;transition:all .3s ease;line-height:1.2;text-align:center}
.btn-primary{background:var(--primary-dark);color:#fff}
.btn-primary:hover{background:#123B5E;transform:translateY(-2px);box-shadow:0 8px 24px rgba(11,43,77,0.25)}
.btn-outline{background:transparent;border:1px solid var(--primary-dark);color:var(--primary-dark)}
.btn-outline:hover{background:var(--bg-soft);transform:translateY(-2px)}
.btn-neon{background:var(--accent-neon);color:var(--primary-dark)}
.btn-neon:hover{background:var(--accent-neon-hover);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,229,255,0.3)}
.btn-amber{background:var(--accent-amber);color:#fff}
.btn-amber:hover{background:#F7B84A;transform:translateY(-2px);box-shadow:0 8px 24px rgba(245,166,35,0.3)}
.badge{display:inline-block;padding:4px 14px;border-radius:999px;background:var(--bg-soft);color:var(--primary-dark);font-size:13px;font-weight:600;line-height:1.4}
.badge-amber{background:var(--accent-amber);color:#fff}
.badge-neon{background:rgba(0,229,255,0.15);color:var(--primary-dark)}
.card{background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);transition:transform .3s ease,box-shadow .3s ease;overflow:hidden}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.card-pad{padding:32px}
.list-custom li{position:relative;padding-left:26px;margin-bottom:12px;line-height:1.7}
.list-custom li::before{content:'';position:absolute;left:0;top:9px;width:8px;height:8px;background:var(--accent-neon);border-radius:2px;box-shadow:0 0 8px rgba(0,229,255,0.4)}
.list-custom li strong{color:var(--primary-dark)}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:60px 20px;background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);text-align:center}
.empty-state .empty-icon{width:48px;height:48px;border-radius:50%;background:var(--bg-soft);margin-bottom:16px;position:relative}
.empty-state .empty-icon::after{content:'';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:20px;height:20px;border:2px solid var(--text-muted);border-radius:50%}
.empty-state p{color:var(--text-muted);font-size:16px}
/* ===== 导航 ===== */
.site-header{position:sticky;top:0;z-index:1000;background:var(--nav-bg);box-shadow:0 4px 20px rgba(0,0,0,0.25)}
.nav-neon-line{height:2px;background:linear-gradient(90deg,var(--accent-neon),#8A5CF6,var(--accent-neon));background-size:200% 100%;animation:neonFlow 4s ease infinite}
@keyframes neonFlow{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;color:#fff;font-size:22px;font-weight:900;letter-spacing:1px;line-height:1.2}
.logo-dot{width:10px;height:10px;background:var(--accent-neon);border-radius:50%;margin-right:8px;box-shadow:0 0 12px rgba(0,229,255,0.8);flex-shrink:0}
.logo-accent{color:var(--accent-neon)}
.main-nav{display:flex;align-items:center;gap:2px}
.main-nav a{color:var(--nav-link);font-size:15px;font-weight:600;padding:10px 14px;border-radius:8px;transition:color .3s,background .3s,box-shadow .3s}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,0.06)}
.main-nav a.active{color:var(--accent-neon);box-shadow:0 10px 18px -8px rgba(0,229,255,0.55);text-shadow:0 0 12px rgba(0,229,255,0.3)}
.nav-cta{margin-left:8px;background:var(--accent-neon);color:var(--primary-dark) !important;border-radius:var(--radius-btn);padding:10px 22px !important;font-weight:700}
.nav-cta:hover{background:var(--accent-neon-hover);color:var(--primary-dark) !important;transform:translateY(-1px)}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:10px;border-radius:8px}
.menu-toggle span{display:block;width:22px;height:2px;background:#fff;margin:5px 0;transition:all .3s;border-radius:2px}
.menu-toggle:hover span{background:var(--accent-neon)}
.nav-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(10,31,51,0.8);z-index:998;opacity:0;transition:opacity .3s}
.nav-overlay.visible{display:block;opacity:1}
@media (max-width:1024px){
  .menu-toggle{display:block}
  .main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--nav-bg);flex-direction:column;padding:16px 24px 24px;gap:4px;box-shadow:0 20px 40px rgba(0,0,0,0.3)}
  .main-nav.open{display:flex}
  .main-nav a{display:block;width:100%;padding:14px 16px;font-size:16px;border-radius:8px}
  .main-nav a.active{box-shadow:inset 3px 0 0 var(--accent-neon),0 0 18px -6px rgba(0,229,255,0.4)}
  .nav-cta{margin:8px 0 0;text-align:center}
}
/* ===== Hero ===== */
.hero{padding:80px 0 60px;background:var(--bg-main);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:0;right:0;width:50%;height:100%;background:linear-gradient(135deg,transparent,rgba(0,229,255,0.04));pointer-events:none}
.hero-inner{display:flex;align-items:center;gap:48px}
.hero-text{flex:1}
.hero-text h1{font-size:42px;line-height:1.3;margin-bottom:20px}
.hero-text .hero-sub{font-size:18px;color:var(--text-body);margin-bottom:32px;max-width:520px;line-height:1.8}
.hero-buttons{display:flex;gap:16px;flex-wrap:wrap}
.hero-image{flex:1;position:relative}
.hero-image img{width:100%;border-radius:var(--radius-img);box-shadow:var(--shadow-hover);position:relative;z-index:1}
.hero-image::before{content:'';position:absolute;top:-14px;right:-14px;width:100%;height:100%;border:2px solid var(--accent-neon);border-radius:var(--radius-img);opacity:0.4;z-index:0}
@media (max-width:1024px){
  .hero-inner{flex-direction:column}
  .hero-text h1{font-size:34px}
  .hero-sub{font-size:16px}
  .hero-image::before{top:-8px;right:-8px}
}
@media (max-width:640px){
  .hero{padding:48px 0}
  .hero-text h1{font-size:30px}
  .hero-buttons{flex-direction:column;width:100%}
  .hero-buttons .btn{width:100%}
}
/* ===== 数据条 ===== */
.stats-section{padding:48px 0;border-bottom:1px solid var(--border-light);background:#fff}
.stats-row{display:grid;grid-template-columns:repeat(4,1fr);gap:32px}
.stat-item{text-align:center;padding:24px 16px}
.stat-num{display:block;font-size:34px;font-weight:900;color:var(--primary-dark);line-height:1.2;margin-bottom:6px}
.stat-label{display:block;font-size:14px;color:var(--text-muted)}
@media (max-width:768px){
  .stats-row{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat-num{font-size:28px}
}
/* ===== 功能分组 ===== */
.features-section{padding:80px 0}
.section-title{text-align:center;margin-bottom:16px}
.section-desc{text-align:center;color:var(--text-muted);font-size:16px;max-width:680px;margin:0 auto 48px}
.feature-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:24px}
.feature-main{position:relative;border-radius:var(--radius-card);overflow:hidden;min-height:420px;display:flex;flex-direction:column;justify-content:flex-end;background:var(--primary-dark);box-shadow:var(--shadow-card)}
.feature-main img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0.45}
.feature-main-content{position:relative;z-index:1;padding:32px;background:linear-gradient(180deg,transparent,rgba(11,43,77,0.9))}
.feature-main-content h3{color:#fff;font-size:26px;margin-bottom:12px}
.feature-main-content p{color:#C9D8E5;font-size:15px;margin-bottom:20px;line-height:1.7}
.feature-main-content .btn{background:var(--accent-neon);color:var(--primary-dark)}
.feature-main-content .btn:hover{background:var(--accent-neon-hover)}
.feature-sub{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.feature-sub-item{background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:28px;display:flex;flex-direction:column;justify-content:center;transition:transform .3s,box-shadow .3s}
.feature-sub-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.feature-sub-item h3{font-size:20px;margin-bottom:10px}
.feature-sub-item p{font-size:15px;color:var(--text-muted);margin-bottom:16px;line-height:1.6}
.feature-sub-item .learn-more{color:var(--primary-dark);font-weight:700;font-size:14px;display:inline-flex;align-items:center;gap:4px;transition:color .3s}
.feature-sub-item .learn-more:hover{color:var(--accent-neon)}
.feature-sub-item .learn-more::after{content:'→';transition:transform .3s}
.feature-sub-item .learn-more:hover::after{transform:translateX(4px)}
@media (max-width:1024px){
  .feature-grid{grid-template-columns:1fr}
  .feature-sub{grid-template-rows:none;grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .feature-sub{grid-template-columns:1fr}
  .feature-main{min-height:320px}
}
/* ===== 使用场景 ===== */
.scenarios-section{padding:80px 0;background:var(--bg-soft)}
.scenario-item{display:flex;align-items:center;gap:48px;margin-bottom:64px}
.scenario-item:last-child{margin-bottom:0}
.scenario-item.reverse{flex-direction:row-reverse}
.scenario-img{flex:1}
.scenario-img img{width:100%;border-radius:var(--radius-img);box-shadow:var(--shadow-card);transition:box-shadow .3s}
.scenario-img img:hover{box-shadow:var(--shadow-hover)}
.scenario-content{flex:1}
.scenario-content h3{font-size:26px;margin-bottom:16px}
.scenario-content .list-custom{margin-top:16px}
@media (max-width:1024px){
  .scenario-item,.scenario-item.reverse{flex-direction:column;gap:24px}
  .scenario-content h3{font-size:22px}
}
/* ===== 成功案例 ===== */
.cases-section{padding:80px 0}
.case-card{display:flex;flex-direction:column;height:100%}
.case-card img{width:100%;height:180px;object-fit:cover;border-radius:var(--radius-img);margin-bottom:16px}
.case-card-body{padding:8px 0 0;flex:1;display:flex;flex-direction:column}
.case-card-body h3{font-size:19px;margin-bottom:8px}
.case-card-body p{font-size:14px;color:var(--text-muted);line-height:1.6;margin-bottom:16px;flex:1}
.case-card-meta{display:flex;align-items:center;justify-content:space-between}
.case-card-meta .badge{font-size:12px}
.case-card-meta a{font-weight:700;font-size:14px;color:var(--primary-dark);transition:color .3s}
.case-card-meta a:hover{color:var(--accent-neon)}
@media (max-width:1024px){
  .case-card{margin-bottom:24px}
}
@media (max-width:640px){
  .case-card img{height:150px}
}
/* ===== 价格区 ===== */
.pricing-section{padding:80px 0}
.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch}
.pricing-card{position:relative;background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:36px 28px;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s}
.pricing-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.pricing-card.recommended{border:2px solid var(--accent-neon);transform:scale(1.03);z-index:1;box-shadow:0 8px 40px rgba(0,229,255,0.15)}
.pricing-card.recommended:hover{transform:scale(1.03) translateY(-4px)}
.pricing-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--accent-amber);color:#fff;padding:5px 18px;border-radius:999px;font-size:13px;font-weight:700;white-space:nowrap;box-shadow:0 4px 12px rgba(245,166,35,0.3)}
.pricing-name{font-size:20px;font-weight:900;color:var(--primary-dark);margin-bottom:8px}
.pricing-desc{font-size:14px;color:var(--text-muted);margin-bottom:20px;line-height:1.6}
.pricing-price{font-size:42px;font-weight:900;color:var(--primary-dark);line-height:1.1;margin-bottom:24px;display:flex;align-items:baseline;gap:4px}
.pricing-price small{font-size:14px;color:var(--text-muted);font-weight:400}
.pricing-features{flex:1;margin-bottom:24px}
.pricing-features li{position:relative;padding-left:24px;margin-bottom:10px;font-size:15px;line-height:1.6;color:var(--text-body)}
.pricing-features li::before{content:'✓';position:absolute;left:0;top:0;color:var(--accent-neon);font-weight:700}
.pricing-card.recommended .pricing-features li::before{color:var(--accent-amber)}
.pricing-card .btn{width:100%}
@media (max-width:1024px){
  .pricing-grid{grid-template-columns:1fr;max-width:480px;margin:0 auto}
  .pricing-card.recommended{transform:scale(1)}
  .pricing-card.recommended:hover{transform:translateY(-4px)}
}
/* ===== 最新资讯 ===== */
.news-section{padding:80px 0;background:var(--bg-soft)}
.news-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:24px}
.news-featured-card{background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:32px;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s}
.news-featured-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.news-featured-card h3{font-size:22px;margin:16px 0 12px;line-height:1.4}
.news-featured-card h3 a{transition:color .3s}
.news-featured-card h3 a:hover{color:var(--accent-neon)}
.news-featured-card p{color:var(--text-muted);font-size:15px;flex:1;margin-bottom:20px}
.news-meta{display:flex;align-items:center;gap:12px;color:var(--text-muted);font-size:13px}
.news-sub-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.news-sub-card{background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:24px;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s}
.news-sub-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.news-sub-card h4{font-size:16px;line-height:1.5;margin:12px 0 8px}
.news-sub-card h4 a{transition:color .3s}
.news-sub-card h4 a:hover{color:var(--accent-neon)}
.news-sub-card p{font-size:13px;color:var(--text-muted);line-height:1.6;flex:1;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-sub-card .news-meta{font-size:12px}
@media (max-width:1024px){
  .news-layout{grid-template-columns:1fr}
  .news-sub-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .news-sub-grid{grid-template-columns:1fr}
  .news-featured-card{padding:24px}
}
/* ===== FAQ ===== */
.faq-section{padding:80px 0}
.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--bg-card);border-radius:var(--radius-card);box-shadow:var(--shadow-card);margin-bottom:16px;overflow:hidden;transition:box-shadow .3s}
.faq-item:hover{box-shadow:var(--shadow-hover)}
.faq-item.active{border-left:4px solid var(--accent-neon)}
.faq-question{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;cursor:pointer;font-size:16px;font-weight:700;color:var(--primary-dark);transition:background .3s}
.faq-question:hover{background:var(--bg-soft)}
.faq-question::after{content:'+';font-size:22px;font-weight:400;color:var(--accent-neon);transition:transform .3s;flex-shrink:0}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{display:none;padding:0 24px 20px;font-size:15px;color:var(--text-body);line-height:1.8}
.faq-item.active .faq-answer{display:block}
@media (max-width:640px){
  .faq-question{font-size:15px;padding:16px 18px}
  .faq-answer{padding:0 18px 16px}
}
/* ===== CTA横幅 ===== */
.cta-banner{padding:64px 0;background:var(--primary-dark) url('/assets/images/backpic/back-3.webp') center/cover no-repeat;position:relative;overflow:hidden}
.cta-banner::before{content:'';position:absolute;inset:0;background:rgba(11,43,77,0.85)}
.cta-content{position:relative;z-index:1;text-align:center;max-width:640px;margin:0 auto}
.cta-content h2{color:#fff;font-size:32px;margin-bottom:16px}
.cta-content p{color:#B7C6D6;font-size:16px;margin-bottom:32px;line-height:1.7}
.cta-content .btn{background:var(--accent-neon);color:var(--primary-dark);padding:14px 40px}
.cta-content .btn:hover{background:var(--accent-neon-hover)}
@media (max-width:640px){
  .cta-banner{padding:48px 0}
  .cta-content h2{font-size:26px}
}
/* ===== 页脚 ===== */
.site-footer{background:var(--footer-bg);color:#B7C6D6;font-size:14px}
.footer-main{padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{color:#8FA3B6;line-height:1.7;font-size:14px}
.footer-title{color:#fff;font-size:16px;font-weight:700;margin-bottom:18px;position:relative;padding-bottom:10px}
.footer-title::after{content:'';position:absolute;bottom:0;left:0;width:32px;height:2px;background:var(--accent-neon);border-radius:2px}
.footer-links li{margin-bottom:10px}
.footer-links a{color:#8FA3B6;transition:color .3s,padding-left .3s}
.footer-links a:hover{color:var(--accent-neon);padding-left:4px}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding:20px 0;text-align:center;font-size:13px;color:#5B708A}
.footer-bottom .domain{color:#B7C6D6;font-weight:600}
@media (max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:640px){
  .footer-grid{grid-template-columns:1fr;gap:28px}
}

/* roulang page: category1 */
:root {
  --bg: #F3F8FC;
  --bg-card: #FFFFFF;
  --primary: #0B2B4D;
  --primary-light: #13467A;
  --accent: #00E5FF;
  --accent-hover: #38EAFF;
  --amber: #F5A623;
  --body: #33475B;
  --muted: #8FA3B6;
  --border: #C9D8E5;
  --radius: 14px;
  --radius-btn: 8px;
  --radius-input: 10px;
  --shadow: 0 2px 10px rgba(11, 43, 77, 0.08);
  --shadow-hover: 0 8px 24px rgba(11, 43, 77, 0.14);
  --spacer: 80px;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --nav-bg: #0A1F33;
  --footer-bg: #07182A;
  --section-bg-soft: #EAF2F9;
}

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

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

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
  background-color: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .2s ease, opacity .2s ease;
}

a:hover,
a:focus {
  color: var(--primary-light);
  outline: none;
}

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: var(--font-family);
  font-size: 1rem;
}

ul,
ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.row {
  max-width: 1200px;
  margin: 0 auto;
}

.columns {
  padding-left: 12px;
  padding-right: 12px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--nav-bg);
  box-shadow: 0 2px 16px rgba(7, 24, 42, .45);
}

.header-glow {
  height: 2px;
  background: linear-gradient(90deg, #00E5FF, #8A5CF6, #00E5FF);
  background-size: 200% 100%;
  animation: glowMove 4s linear infinite;
}

@keyframes glowMove {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
  padding-top: 6px;
  padding-bottom: 6px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 900;
  color: #FFFFFF;
  letter-spacing: 1px;
  white-space: nowrap;
}

.logo:hover {
  color: #FFFFFF;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(0, 229, 255, .8);
  flex-shrink: 0;
}

.logo-accent {
  color: var(--accent);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav a {
  display: inline-block;
  padding: 8px 14px;
  color: #B7C6D6;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  transition: color .22s, background .22s, box-shadow .22s;
}

.main-nav a:hover {
  color: #FFFFFF;
  background: rgba(0, 229, 255, .08);
}

.main-nav a.active {
  color: var(--accent);
  box-shadow: 0 10px 18px -8px rgba(0, 229, 255, .55);
}

.main-nav a.nav-cta {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  border-radius: var(--radius-btn);
  padding: 9px 20px;
  margin-left: 6px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .22s, transform .2s, box-shadow .22s;
}

.main-nav a.nav-cta:hover {
  background: var(--accent-hover);
  color: var(--primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0, 229, 255, .4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 5px;
  border-radius: var(--radius-btn);
  background: rgba(255, 255, 255, .08);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: #FFFFFF;
  transition: transform .25s, opacity .25s;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero / 顶部标题区 ===== */
.cat-hero {
  position: relative;
  padding: 64px 0 72px;
  background-color: var(--bg);
  background-image: linear-gradient(rgba(11, 43, 77, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 43, 77, .04) 1px, transparent 1px);
  background-size: 32px 32px;
  overflow: hidden;
}

.cat-hero-inner {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 48px;
  align-items: center;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--muted);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--border);
}

.breadcrumb a {
  color: var(--muted);
}

.breadcrumb a:hover {
  color: var(--primary);
}

.cat-hero h1 {
  font-size: 42px;
  line-height: 1.25;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.cat-hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--body);
  max-width: 520px;
  margin-bottom: 32px;
}

.cat-hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: transform .22s, box-shadow .22s, background .22s, color .22s, border-color .22s;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--primary-light);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(11, 43, 77, .06);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
}

.btn-accent:hover {
  background: var(--accent-hover);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 229, 255, .4);
}

.btn-amber {
  background: var(--amber);
  color: #FFFFFF;
}

.btn-amber:hover {
  background: #E09513;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 166, 35, .35);
}

.cat-hero-media {
  position: relative;
}

.cat-hero-media::before {
  content: "";
  position: absolute;
  top: -14px;
  left: -14px;
  right: 14px;
  bottom: 14px;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  opacity: .4;
  z-index: 0;
}

.cat-hero-img {
  position: relative;
  z-index: 1;
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  aspect-ratio: 4 / 3;
  object-fit: cover;
  width: 100%;
}

/* ===== 公共板块头部 ===== */
.section-head {
  text-align: center;
  margin-bottom: 44px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 12px;
  letter-spacing: 1px;
}

.section-head p {
  font-size: 15px;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 专题卡 ===== */
.cat-features {
  padding: var(--spacer) 0;
  background: #FFFFFF;
}

.cat-feature-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 32px;
  transition: box-shadow .3s, transform .3s;
}

.cat-feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.cat-feature-card-2 .cat-feature-media {
  order: 2;
}

.cat-feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 280px;
  aspect-ratio: 4 / 3;
}

.cat-feature-content {
  padding: 36px 40px;
}

.cat-feature-content h3 {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 14px;
}

.cat-feature-content p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--body);
  margin-bottom: 22px;
}

/* ===== 纵向列表 ===== */
.cat-list-section {
  padding: var(--spacer) 0;
  background: var(--bg);
}

.cat-list {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.cat-list-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 30px;
  border-bottom: 1px solid rgba(11, 43, 77, .06);
  transition: background .22s, box-shadow .22s;
}

.cat-list-item:last-child {
  border-bottom: none;
}

.cat-list-item:hover {
  background: var(--section-bg-soft);
  box-shadow: inset 3px 0 0 var(--accent);
}

.cat-list-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(0, 229, 255, .6);
  flex-shrink: 0;
}

.cat-list-content {
  flex: 1;
  display: block;
}

.cat-list-title {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}

.cat-list-desc {
  display: block;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.cat-list-arrow {
  font-size: 20px;
  color: var(--muted);
  flex-shrink: 0;
  transition: color .22s, transform .22s;
}

.cat-list-item:hover .cat-list-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

/* ===== 流程区 ===== */
.cat-steps {
  padding: var(--spacer) 0;
  background: #FFFFFF;
}

.cat-steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cat-step-item {
  background: var(--bg-card);
  border: 1px solid rgba(11, 43, 77, .06);
  border-radius: var(--radius);
  padding: 28px 26px;
  text-align: center;
  transition: box-shadow .3s, transform .3s, border-color .3s;
}

.cat-step-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.cat-step-num {
  display: inline-block;
  font-size: 30px;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 14px;
  text-shadow: 0 0 18px rgba(0, 229, 255, .3);
}

.cat-step-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.cat-step-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.65;
}

/* ===== FAQ ===== */
.cat-faq {
  padding: var(--spacer) 0;
  background: var(--section-bg-soft);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow .25s;
}

.faq-item.active {
  box-shadow: var(--shadow-hover);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  text-align: left;
  background: transparent;
  line-height: 1.4;
  transition: color .22s;
}

.faq-q:hover {
  color: var(--primary-light);
}

.faq-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: transform .25s, background .25s;
}

.faq-icon::before {
  width: 16px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  width: 2px;
  height: 16px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
  background: var(--accent);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
}

.faq-item.active .faq-a {
  max-height: 400px;
  padding: 0 28px 22px;
}

.faq-a p {
  font-size: 15px;
  color: var(--body);
  line-height: 1.75;
  border-left: 4px solid var(--accent);
  padding-left: 18px;
}

/* ===== CTA ===== */
.cat-cta {
  padding: 72px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}

.cat-cta::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(0, 229, 255, .25) 0%, transparent 70%);
  border-radius: 50%;
}

.cat-cta::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: 10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, .06) 0%, transparent 70%);
  border-radius: 50%;
}

.cat-cta .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cat-cta h2 {
  font-size: 32px;
  font-weight: 900;
  color: #FFFFFF;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.cat-cta p {
  font-size: 16px;
  color: rgba(255, 255, 255, .78);
  max-width: 520px;
  margin: 0 auto 28px;
  line-height: 1.7;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--footer-bg);
  color: #B7C6D6;
  font-size: 14px;
}

.footer-main {
  padding: 56px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand p {
  margin-top: 14px;
  line-height: 1.7;
  color: #8FA3B6;
  max-width: 300px;
}

.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 18px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #B7C6D6;
  font-size: 14px;
  transition: color .2s;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  text-align: center;
  color: #8FA3B6;
  font-size: 13px;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== 响应式 ===== */
@media screen and (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .cat-hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cat-hero-media {
    max-width: 560px;
  }

  .cat-feature-card {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .cat-feature-card-2 .cat-feature-media {
    order: 0;
  }

  .cat-feature-media img {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }

  .cat-feature-content {
    padding: 28px 30px;
  }

  .cat-steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media screen and (max-width: 768px) {
  .header-inner {
    min-height: 64px;
  }

  .main-nav {
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    gap: 4px;
    box-shadow: 0 12px 24px rgba(7, 24, 42, .5);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform .32s ease, opacity .32s, visibility .32s;
    z-index: 998;
    border-top: 1px solid rgba(0, 229, 255, .15);
  }

  .main-nav.mobile-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav a {
    padding: 14px 16px;
    font-size: 16px;
    border-radius: 8px;
  }

  .main-nav a.nav-cta {
    margin-left: 0;
    margin-top: 8px;
  }

  .nav-toggle {
    display: flex;
  }

  .cat-hero {
    padding: 44px 0 52px;
  }

  .cat-hero h1 {
    font-size: 30px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .section-head p {
    font-size: 14px;
  }

  .cat-feature-content h3 {
    font-size: 22px;
  }

  .cat-list-item {
    padding: 20px;
    gap: 14px;
    flex-wrap: wrap;
  }

  .cat-list-arrow {
    margin-left: auto;
  }

  .cat-steps-grid {
    grid-template-columns: 1fr;
  }

  .cat-cta h2 {
    font-size: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media screen and (max-width: 520px) {
  .cat-hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .cat-hero-actions .btn {
    width: 100%;
  }

  .cat-feature-content {
    padding: 22px 20px;
  }

  .cat-list-dot {
    display: none;
  }

  .cat-step-item {
    padding: 22px 18px;
  }

  .faq-q {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-item.active .faq-a {
    padding: 0 20px 18px;
  }

  .footer-main {
    padding: 36px 0 24px;
  }
}

/* ===== 清除Foundation默认干扰 ===== */
.button,
button.button {
  margin-bottom: 0;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
  box-shadow: none;
}

/* roulang page: article */
:root {
    --primary: #0B2B4D;
    --primary-light: #123F6B;
    --primary-dark: #07182A;
    --accent: #00E5FF;
    --accent-hover: #38EAFF;
    --amber: #F5A623;
    --bg: #F3F8FC;
    --card-bg: #FFFFFF;
    --text: #33475B;
    --text-weak: #8FA3B6;
    --border: #C9D8E5;
    --radius-card: 14px;
    --radius-btn: 8px;
    --radius-input: 10px;
    --radius-img: 12px;
    --shadow-card: 0 2px 10px rgba(11, 43, 77, 0.08);
    --shadow-hover: 0 8px 24px rgba(11, 43, 77, 0.14);
    --max-width: 1200px;
    --space-section: 80px;
    --space-section-mobile: 48px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
  }

  a:hover {
    color: var(--accent);
  }

  button,
  input {
    font-family: inherit;
  }

  .container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
  }

  .btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: var(--radius-btn);
    font-size: 16px;
    font-weight: 700;
    min-height: 44px;
    line-height: 1.4;
    border: none;
    cursor: pointer;
    text-align: center;
    transition: all 0.25s ease;
    text-decoration: none;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
  }

  .btn-primary:hover {
    background: var(--primary-light);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(11, 43, 77, 0.22);
  }

  .btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
  }

  .btn-outline:hover {
    background: rgba(233, 242, 249, 0.6);
    border-color: var(--accent);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(11, 43, 77, 0.1);
  }

  .btn-accent {
    background: var(--accent);
    color: var(--primary);
  }

  .btn-accent:hover {
    background: var(--accent-hover);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(0, 229, 255, 0.35);
  }

  .badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    background: #EAF2F9;
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    line-height: 1.6;
  }

  .badge-amber {
    background: var(--amber);
    color: #fff;
  }

  /* ===== Header / Nav ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: #0A1F33;
    box-shadow: 0 2px 12px rgba(7, 24, 42, 0.35);
  }

  .site-header::before {
    content: "";
    display: block;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), #8A5CF6, var(--accent));
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 68px;
  }

  .logo {
    display: flex;
    align-items: center;
    font-size: 22px;
    font-weight: 900;
    color: #fff;
    letter-spacing: 0.5px;
    text-decoration: none;
  }

  .logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    margin-right: 8px;
    box-shadow: 0 0 8px rgba(0, 229, 255, 0.8);
  }

  .logo-accent {
    color: var(--accent);
    font-weight: 700;
    margin-left: 2px;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
  }

  .main-nav a {
    display: inline-block;
    padding: 8px 16px;
    color: #B7C6D6;
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .main-nav a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
  }

  .main-nav a.active {
    color: var(--accent);
    box-shadow: 0 10px 18px -8px rgba(0, 229, 255, 0.55);
    font-weight: 700;
  }

  .main-nav .nav-cta {
    background: var(--accent);
    color: var(--primary);
    padding: 10px 22px;
    border-radius: var(--radius-btn);
    font-weight: 700;
    margin-left: 8px;
    box-shadow: 0 4px 14px rgba(0, 229, 255, 0.35);
  }

  .main-nav .nav-cta:hover {
    background: var(--accent-hover);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(0, 229, 255, 0.45);
  }

  .mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    width: 44px;
    height: 44px;
    cursor: pointer;
    padding: 12px;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
  }

  .mobile-toggle span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: #fff;
    transition: all 0.3s ease;
  }

  .mobile-toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .mobile-toggle.is-active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ===== Breadcrumb ===== */
  .breadcrumb-bar {
    padding: 16px 0 0;
  }

  .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-weak);
  }

  .breadcrumb a {
    color: var(--text-weak);
    text-decoration: none;
    transition: color 0.2s ease;
  }

  .breadcrumb a:hover {
    color: var(--accent);
  }

  .breadcrumb .breadcrumb-sep {
    color: #C9D8E5;
  }

  .breadcrumb .breadcrumb-current {
    color: var(--primary);
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 320px;
  }

  /* ===== Article Main ===== */
  .article-main {
    padding: 32px 0 var(--space-section);
  }

  .article-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 48px 56px;
    margin-top: 24px;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
  }

  .article-header {
    border-bottom: 1px solid #EAF2F9;
    padding-bottom: 28px;
    margin-bottom: 32px;
  }

  .article-header h1 {
    font-size: 36px;
    font-weight: 900;
    color: var(--primary);
    line-height: 1.35;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
  }

  .article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--text-weak);
  }

  .article-meta .badge {
    background: #EAF2F9;
    color: var(--primary);
  }

  .article-meta .meta-sep {
    color: #D5E2EE;
  }

  .article-body {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
  }

  .article-body h2 {
    font-size: 26px;
    font-weight: 800;
    color: var(--primary);
    margin: 36px 0 18px;
    padding-bottom: 8px;
    position: relative;
  }

  .article-body h2::before {
    content: "";
    display: block;
    width: 4px;
    height: 22px;
    border-radius: 4px;
    background: var(--accent);
    position: absolute;
    left: -16px;
    top: 6px;
  }

  .article-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin: 28px 0 14px;
  }

  .article-body h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--primary);
    margin: 22px 0 10px;
  }

  .article-body p {
    margin-bottom: 20px;
  }

  .article-body ul,
  .article-body ol {
    margin: 16px 0 24px;
    padding-left: 24px;
  }

  .article-body ul li {
    position: relative;
    padding-left: 6px;
    margin-bottom: 10px;
    list-style: none;
  }

  .article-body ul li::before {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 2px;
    background: var(--accent);
    margin-right: 10px;
    transform: rotate(45deg);
  }

  .article-body ol li {
    margin-bottom: 10px;
    list-style: decimal;
  }

  .article-body blockquote {
    border-left: 4px solid var(--accent);
    background: #F8FCFF;
    padding: 18px 24px;
    border-radius: 0 12px 12px 0;
    margin: 28px 0;
    color: var(--text);
    font-style: normal;
  }

  .article-body img {
    border-radius: var(--radius-img);
    box-shadow: var(--shadow-card);
    margin: 24px auto;
    max-width: 100%;
    height: auto;
  }

  .article-body a {
    color: var(--accent);
    border-bottom: 1px solid rgba(0, 229, 255, 0.4);
    padding-bottom: 1px;
    transition: all 0.2s ease;
  }

  .article-body a:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
  }

  .article-body code {
    background: #EAF2F9;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
    font-size: 0.9em;
  }

  .article-body pre {
    background: #0B2B4D;
    color: #EAF2F9;
    padding: 20px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 24px 0;
    font-family: "SF Mono", "Cascadia Code", Consolas, monospace;
    font-size: 14px;
    line-height: 1.7;
  }

  .article-body pre code {
    background: transparent;
    padding: 0;
    color: inherit;
  }

  .article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 15px;
  }

  .article-body table th,
  .article-body table td {
    border: 1px solid #EAF2F9;
    padding: 12px 16px;
    text-align: left;
  }

  .article-body table th {
    background: #F3F8FC;
    font-weight: 700;
    color: var(--primary);
  }

  .article-empty {
    text-align: center;
    padding: 80px 20px;
  }

  .article-empty .empty-icon {
    font-size: 56px;
    color: #B7C6D6;
    margin-bottom: 20px;
  }

  .article-empty p {
    font-size: 18px;
    color: var(--text-weak);
    margin-bottom: 24px;
  }

  .article-empty .btn {
    margin-top: 8px;
  }

  /* ===== Tags ===== */
  .article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid #EAF2F9;
  }

  .article-tags .tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    background: #EAF2F9;
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    transition: all 0.2s ease;
  }

  .article-tags .tag:hover {
    background: var(--accent);
    color: var(--primary);
  }

  /* ===== Prev Next ===== */
  .article-prevnext {
    display: flex;
    gap: 20px;
    margin-top: 32px;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
  }

  .pn-item {
    flex: 1;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 20px 24px;
    border: 1px solid rgba(201, 216, 229, 0.4);
    transition: all 0.25s ease;
    text-decoration: none;
    display: block;
  }

  .pn-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
  }

  .pn-label {
    display: block;
    font-size: 13px;
    color: var(--text-weak);
    margin-bottom: 6px;
    font-weight: 600;
  }

  .pn-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.5;
  }

  .pn-item:hover .pn-title {
    color: var(--primary);
  }

  .pn-item.next {
    text-align: right;
  }

  /* ===== Related ===== */
  .related-section {
    max-width: 860px;
    margin: 56px auto 0;
  }

  .related-section .section-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
    position: relative;
    display: inline-block;
  }

  .related-section .section-title::after {
    content: "";
    display: block;
    width: 100%;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    margin-top: 4px;
  }

  .related-section .section-sub {
    font-size: 14px;
    color: var(--text-weak);
    margin-bottom: 28px;
  }

  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .related-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(201, 216, 229, 0.3);
  }

  .related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(0, 229, 255, 0.4);
  }

  .related-card-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 0;
  }

  .related-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .related-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .related-card-summary {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
    flex: 1;
  }

  .related-card-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s ease;
  }

  .related-card:hover .related-card-link {
    color: var(--accent);
  }

  /* ===== Return ===== */
  .article-return {
    text-align: center;
    margin-top: 48px;
  }

  .article-return .btn {
    margin: 0 6px;
  }

  /* ===== CTA ===== */
  .cta-section {
    background: var(--primary);
    padding: 64px 0;
    margin-top: 40px;
  }

  .cta-section .cta-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
    gap: 16px;
  }

  .cta-section h2 {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 4px;
  }

  .cta-section p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
  }

  .cta-section .btn-accent {
    margin-top: 8px;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
  }

  .footer-main {
    padding: 56px 0 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
  }

  .footer-brand .logo {
    margin-bottom: 16px;
    font-size: 20px;
  }

  .footer-brand p {
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.7;
    font-size: 14px;
    max-width: 340px;
  }

  .footer-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
  }

  .footer-links {
    list-style: none;
    padding: 0;
  }

  .footer-links li {
    margin-bottom: 12px;
  }

  .footer-links a {
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-links a:hover {
    color: var(--accent);
    padding-left: 4px;
  }

  .footer-bottom {
    padding: 24px 0;
    text-align: center;
  }

  .footer-bottom p {
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
  }

  .footer-bottom a {
    color: inherit;
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .main-nav {
      display: none;
    }
    .main-nav.mobile-open {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: 68px;
      left: 0;
      right: 0;
      background: #0A1F33;
      padding: 16px;
      gap: 4px;
      box-shadow: 0 8px 24px rgba(7, 24, 42, 0.5);
      z-index: 999;
      border-top: 1px solid rgba(0, 229, 255, 0.2);
    }
    .main-nav.mobile-open a {
      padding: 12px 16px;
      width: 100%;
      font-size: 16px;
      border-radius: 8px;
      min-height: 48px;
      display: flex;
      align-items: center;
    }
    .main-nav.mobile-open .nav-cta {
      margin-top: 8px;
      margin-left: 0;
      justify-content: center;
    }
    .mobile-toggle {
      display: flex;
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
    .related-grid {
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .article-card {
      padding: 36px 32px;
    }
    .article-header h1 {
      font-size: 30px;
    }
  }

  @media (max-width: 768px) {
    .related-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .article-prevnext {
      flex-direction: column;
    }
    .pn-item.next {
      text-align: left;
    }
  }

  @media (max-width: 640px) {
    :root {
      --space-section: var(--space-section-mobile);
    }
    .header-inner {
      height: 60px;
    }
    .logo {
      font-size: 18px;
    }
    .article-main {
      padding: 20px 0 40px;
    }
    .breadcrumb-bar {
      padding-top: 12px;
    }
    .breadcrumb .breadcrumb-current {
      max-width: 180px;
    }
    .article-card {
      padding: 24px 20px;
      border-radius: 12px;
    }
    .article-header h1 {
      font-size: 26px;
    }
    .article-meta {
      gap: 10px;
      font-size: 13px;
    }
    .article-body {
      font-size: 15px;
    }
    .article-body h2 {
      font-size: 22px;
    }
    .article-body h3 {
      font-size: 18px;
    }
    .related-grid {
      grid-template-columns: 1fr;
    }
    .related-card-img {
      height: 180px;
    }
    .cta-section {
      padding: 48px 0;
    }
    .cta-section h2 {
      font-size: 24px;
    }
    .article-return .btn {
      width: 100%;
      margin-bottom: 10px;
    }
    .btn {
      padding: 11px 20px;
      font-size: 15px;
    }
  }

/* roulang page: category2 */
:root {
            --bg-primary: #F3F8FC;
            --bg-card: #FFFFFF;
            --bg-dark: #0A1F33;
            --bg-deep: #07182A;
            --primary: #0B2B4D;
            --primary-light: #15456F;
            --accent: #00E5FF;
            --accent-hover: #38EAFF;
            --amber: #F5A623;
            --text-body: #33475B;
            --text-muted: #8FA3B6;
            --border: #C9D8E5;
            --radius-card: 14px;
            --radius-btn: 8px;
            --radius-input: 10px;
            --shadow-card: 0 2px 10px rgba(11, 43, 77, 0.08);
            --shadow-hover: 0 8px 24px rgba(11, 43, 77, 0.14);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --transition: all 0.3s ease;
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-primary);
            color: var(--text-body);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-dark);
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            padding: 0 24px;
        }
        .nav-glow-line {
            height: 2px;
            background: linear-gradient(90deg, var(--accent), #8A5CF6, var(--accent));
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-size: 22px;
            font-weight: 900;
            letter-spacing: 1px;
            text-decoration: none;
        }
        .logo-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.8);
            display: inline-block;
        }
        .logo-accent {
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .main-nav a {
            color: #B7C6D6;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 6px;
            text-decoration: none;
            transition: var(--transition);
            border-radius: 6px;
            position: relative;
        }
        .main-nav a:hover {
            color: #fff;
        }
        .main-nav a.active {
            color: var(--accent);
            box-shadow: 0 10px 18px -8px rgba(0, 229, 255, 0.55);
            font-weight: 700;
        }
        .main-nav a.nav-cta {
            background: var(--accent);
            color: var(--primary);
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 12px rgba(0, 229, 255, 0.3);
        }
        .main-nav a.nav-cta:hover {
            background: var(--accent-hover);
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.5);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 10px;
            cursor: pointer;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

        /* ===== Hero ===== */
        .hero {
            padding: 80px 0;
            background: var(--bg-primary);
            background-image: linear-gradient(135deg, rgba(0, 229, 255, 0.06) 0%, rgba(255, 255, 255, 0) 60%);
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.04);
            z-index: 0;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 255, 0.12);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 24px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero-badge::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.8);
        }
        .hero-title {
            font-size: 42px;
            color: var(--primary);
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }
        .hero-sub {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 540px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 13px 30px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            min-height: 44px;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(11, 43, 77, 0.2);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            min-height: 44px;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.6);
            box-shadow: 0 4px 14px rgba(11, 43, 77, 0.1);
        }
        .hero-image {
            position: relative;
        }
        .hero-image img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .hero-image::after {
            content: "";
            position: absolute;
            top: -14px;
            right: -14px;
            width: 78%;
            height: 78%;
            border: 2px solid rgba(0, 229, 255, 0.35);
            border-radius: var(--radius-card);
            z-index: -1;
        }
        .hero-image::before {
            content: "";
            position: absolute;
            bottom: -14px;
            left: -14px;
            width: 45%;
            height: 45%;
            border: 2px solid rgba(11, 43, 77, 0.12);
            border-radius: var(--radius-card);
            z-index: -1;
        }

        /* ===== Section common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-card);
            padding: 80px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-tagline {
            color: var(--accent);
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .section-title {
            color: var(--primary);
            font-size: 32px;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-desc {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .section-header-left {
            text-align: left;
            margin-bottom: 40px;
        }
        .section-header-left .section-desc {
            margin: 0;
        }

        /* ===== Card Wall (asymmetric) ===== */
        .card-wall-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 24px;
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .card-item:nth-child(1) {
            grid-column: 1 / 4;
        }
        .card-item:nth-child(2) {
            grid-column: 4 / 7;
        }
        .card-item:nth-child(3) {
            grid-column: 2 / 6;
        }
        .card-item:nth-child(4) {
            grid-column: 1 / 4;
        }
        .card-item:nth-child(5) {
            grid-column: 4 / 7;
        }
        .card-item.featured {
            border: 2px solid rgba(0, 229, 255, 0.35);
            box-shadow: 0 4px 24px rgba(0, 229, 255, 0.1);
        }
        .card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            background: #DCE7F1;
        }
        .card-image-placeholder {
            width: 100%;
            height: 180px;
            background: linear-gradient(135deg, #EAF2F9, #DCE7F1);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .placeholder-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            background: var(--bg-dark);
            color: var(--accent);
            font-size: 22px;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(10, 31, 51, 0.2);
        }
        .placeholder-icon.alt {
            background: var(--primary);
            color: #fff;
        }
        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-tag {
            display: inline-block;
            background: #EAF2F9;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
            align-self: flex-start;
        }
        .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-item.featured .card-title {
            font-size: 22px;
        }
        .card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition);
        }
        .card-link:hover {
            color: var(--accent);
            gap: 8px;
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 8px;
        }
        .step-item {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-primary);
            border-radius: var(--radius-card);
            position: relative;
            transition: var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            font-size: 22px;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 4px 14px rgba(11, 43, 77, 0.2);
        }
        .step-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 16px;
            border-left: 1px solid rgba(11, 43, 77, 0.08);
        }
        .stat-item:first-child {
            border-left: none;
        }
        .stat-number {
            font-size: 32px;
            font-weight: 900;
            color: var(--primary);
            margin-bottom: 4px;
            letter-spacing: 1px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== News Strip ===== */
        .news-strip {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 40px;
            margin-top: 48px;
        }
        .news-strip-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .news-strip-title::before {
            content: "";
            width: 4px;
            height: 20px;
            border-radius: 2px;
            background: var(--accent);
        }
        .news-strip-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-strip-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(11, 43, 77, 0.06);
            text-decoration: none;
            transition: var(--transition);
        }
        .news-strip-item:last-child {
            border-bottom: none;
        }
        .news-strip-item:hover {
            padding-left: 8px;
        }
        .news-strip-item:hover .news-strip-link {
            color: var(--accent);
        }
        .news-strip-tag {
            background: #EAF2F9;
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            white-space: nowrap;
        }
        .news-strip-text {
            flex: 1;
            color: var(--text-body);
            font-size: 15px;
            font-weight: 500;
        }
        .news-strip-date {
            color: var(--text-muted);
            font-size: 13px;
            white-space: nowrap;
        }
        .news-strip-link {
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #EAF2F9;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-icon {
            font-size: 22px;
            color: var(--accent);
            transition: transform 0.3s ease;
            flex-shrink: 0;
            line-height: 1;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows 0.35s ease;
        }
        .faq-item.active .faq-answer {
            grid-template-rows: 1fr;
        }
        .faq-answer-inner {
            overflow: hidden;
            padding: 0 24px;
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer-inner {
            padding-bottom: 20px;
        }
        .faq-item.active {
            border-left: 4px solid var(--accent);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 200px;
            background: rgba(0, 229, 255, 0.08);
            border-radius: 50%;
            filter: blur(60px);
        }
        .cta-content {
            text-align: center;
            color: #fff;
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: 32px;
            font-weight: 900;
            margin-bottom: 16px;
            color: #fff;
            letter-spacing: 1px;
        }
        .cta-desc {
            color: rgba(255, 255, 255, 0.75);
            max-width: 600px;
            margin: 0 auto 32px;
            font-size: 16px;
            line-height: 1.8;
        }
        .btn-accent {
            background: var(--accent);
            color: var(--primary);
            border: none;
            padding: 13px 36px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 700;
            min-height: 44px;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 229, 255, 0.4);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            color: #B7C6D6;
        }
        .footer-main {
            padding: 64px 0 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 20px;
        }
        .footer-brand p {
            font-size: 14px;
            color: #8FA3B6;
            line-height: 1.8;
            margin-top: 12px;
        }
        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: #B7C6D6;
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #8FA3B6;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-dark);
                flex-direction: column;
                padding: 16px 24px;
                gap: 8px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
                border-top: 1px solid rgba(0, 229, 255, 0.15);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                display: block;
                width: 100%;
                padding: 14px 16px;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                border-radius: 0;
            }
            .main-nav a.active {
                background: rgba(0, 229, 255, 0.08);
                border-radius: 8px;
                box-shadow: none;
            }
            .main-nav a.nav-cta {
                margin-top: 12px;
                width: 100%;
                border-radius: var(--radius-btn);
            }
            .hamburger {
                display: flex;
            }
            .hamburger.active span:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .card-wall-grid {
                grid-template-columns: 1fr 1fr;
            }
            .card-item:nth-child(n) {
                grid-column: auto;
            }
            .card-item:nth-child(3) {
                grid-column: 1 / -1;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item {
                border-left: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-alt {
                padding: 48px 0;
            }
            .hero {
                padding: 48px 0;
            }
            .hero-title {
                font-size: 30px;
                line-height: 1.3;
            }
            .section-title {
                font-size: 24px;
            }
            .section-desc {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary,
            .btn-outline {
                width: 100%;
            }
            .card-wall-grid {
                grid-template-columns: 1fr;
            }
            .card-item:nth-child(3) {
                grid-column: auto;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-number {
                font-size: 26px;
            }
            .stat-label {
                font-size: 13px;
            }
            .news-strip {
                padding: 24px;
            }
            .news-strip-item {
                flex-wrap: wrap;
                gap: 8px;
            }
            .news-strip-date {
                font-size: 12px;
                margin-left: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .faq-question {
                font-size: 15px;
                padding: 17px 18px;
            }
            .cta-title {
                font-size: 24px;
            }
            .header-inner {
                padding: 0 16px;
                height: 60px;
            }
            .main-nav {
                top: 60px;
            }
            .logo {
                font-size: 19px;
            }
        }
        @media (max-width: 380px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-item {
                padding: 12px 8px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #0B2B4D;
  --primary-dark: #07182A;
  --primary-light: #123B66;
  --accent: #00E5FF;
  --accent-hover: #38EAFF;
  --amber: #F5A623;
  --body: #33475B;
  --muted: #8FA3B6;
  --bg: #F3F8FC;
  --card: #FFFFFF;
  --line: #DCE7F1;
  --radius-card: 14px;
  --radius-btn: 8px;
  --radius-input: 10px;
  --shadow-sm: 0 2px 10px rgba(11,43,77,0.08);
  --shadow-hover: 0 8px 24px rgba(11,43,77,0.14);
  --transition: all 0.3s ease;
  --container: 1200px;
  --space-section: 80px;
  --space-mobile: 48px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  color: var(--body);
  background: var(--bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
::selection { background: rgba(0,229,255,0.25); color: #0B2B4D; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.row { max-width: var(--container); }

.tag-pill {
  display: inline-flex;
  align-items: center;
  background: #EAF2F9;
  color: var(--primary);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.2px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 28px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 44px;
  border: 1px solid transparent;
  cursor: pointer;
  background: transparent;
  transition: all 0.3s ease;
}
.btn-primary {
  background: var(--primary);
  color: #FFFFFF;
}
.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(11,43,77,0.22);
}
.btn-outline {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: #EAF2F9;
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: var(--primary);
}
.btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,229,255,0.3);
}
.btn-outline-light {
  background: transparent;
  border-color: rgba(255,255,255,0.6);
  color: #FFFFFF;
}
.btn-outline-light:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #0A1F33;
}
.nav-line {
  height: 2px;
  background: linear-gradient(90deg, #00E5FF, #8A5CF6, #00E5FF);
}
.nav-wrap {
  background: #0A1F33;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  color: #FFFFFF;
  font-size: 24px;
  font-weight: 900;
  letter-spacing: 1px;
  white-space: nowrap;
}
.logo-dot {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  margin-right: 8px;
  box-shadow: 0 0 12px rgba(0,229,255,0.8);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}
.logo-accent {
  color: var(--accent);
  font-weight: 700;
  margin-left: 2px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.main-nav a {
  color: #B7C6D6;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
  transition: all 0.3s ease;
}
.main-nav a:hover {
  color: #FFFFFF;
}
.main-nav a.active {
  color: var(--accent);
  text-shadow: 0 0 8px rgba(0,229,255,0.45);
  box-shadow: 0 10px 18px -8px rgba(0,229,255,0.55);
}
.main-nav .nav-cta {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 8px;
  box-shadow: none;
  margin-left: 8px;
}
.main-nav .nav-cta:hover {
  background: var(--accent-hover);
  color: var(--primary);
  transform: translateY(-1px);
}
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255,255,255,0.2);
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.hamburger .bar {
  width: 20px;
  height: 2px;
  background: #FFFFFF;
  border-radius: 2px;
  transition: all 0.3s ease;
}
.hamburger.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active .bar:nth-child(2) { opacity: 0; }
.hamburger.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  max-height: 80vh;
  overflow-y: auto;
  background: rgba(10,31,51,0.92);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  padding: 16px 0 24px;
  z-index: 999;
  border-top: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 16px 30px rgba(0,0,0,0.3);
}
.mobile-menu a {
  display: block;
  color: #B7C6D6;
  padding: 14px 24px;
  font-size: 16px;
  border-left: 3px solid transparent;
}
.mobile-menu a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: rgba(0,229,255,0.08);
}
.mobile-menu a:hover {
  color: #FFFFFF;
}
.mobile-menu a.nav-cta {
  margin: 16px 24px 0;
  background: var(--accent);
  color: var(--primary);
  text-align: center;
  border-radius: 8px;
  border-left: none;
  padding: 12px;
  font-weight: 700;
}

.page-hero {
  background:
    linear-gradient(120deg, rgba(243,248,252,0.95) 0%, rgba(243,248,252,0.88) 100%),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--line);
}
.breadcrumb {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--primary);
  font-weight: 500;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb-sep {
  color: var(--muted);
}
.page-hero h1 {
  font-size: 42px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.page-hero .lead {
  font-size: 17px;
  color: var(--body);
  max-width: 760px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.hero-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.service-detail {
  padding: var(--space-section) 0;
  background: var(--bg);
}
.anchor-nav {
  position: sticky;
  top: 100px;
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 24px 20px;
}
.anchor-nav h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.anchor-nav ul li {
  margin-bottom: 4px;
}
.anchor-nav ul li a {
  display: block;
  padding: 8px 12px;
  color: var(--body);
  font-size: 14px;
  border-radius: 8px;
  border-left: 3px solid transparent;
  transition: all 0.3s ease;
}
.anchor-nav ul li a:hover {
  background: #EAF2F9;
  color: var(--primary);
  padding-left: 16px;
}
.anchor-nav ul li a.current {
  background: rgba(0,229,255,0.12);
  color: var(--primary);
  border-left-color: var(--accent);
  font-weight: 600;
}
.detail-content {
  background: var(--card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-sm);
  padding: 40px 40px 20px;
}
.detail-block {
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--line);
}
.detail-block:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 24px;
}
.detail-block h2 {
  font-size: 28px;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 16px;
  line-height: 1.4;
  display: flex;
  align-items: center;
  gap: 12px;
}
.detail-block h2::before {
  content: '';
  width: 6px;
  height: 24px;
  background: var(--accent);
  border-radius: 3px;
  flex-shrink: 0;
}
.detail-block p {
  margin-bottom: 16px;
  color: var(--body);
}
.detail-block .content-img {
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  margin: 24px auto;
  width: 85%;
}
.feature-list {
  margin: 16px 0 20px;
  padding: 0;
}
.feature-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 12px;
  color: var(--body);
}
.feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  transform: rotate(45deg);
}

.cta-band {
  background: var(--primary);
  padding: 72px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, #00E5FF, #8A5CF6, #00E5FF);
}
.cta-band h2 {
  color: #FFFFFF;
  font-size: 32px;
  font-weight: 900;
  margin-bottom: 12px;
  line-height: 1.4;
}
.cta-band p {
  color: rgba(255,255,255,0.75);
  font-size: 16px;
  margin-bottom: 28px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.site-footer {
  background: var(--primary-dark);
  color: #B7C6D6;
}
.footer-main {
  padding: 60px 0 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin-top: 12px;
  max-width: 320px;
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 16px;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--muted);
  font-size: 14px;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: #60778C;
}

@media screen and (max-width: 1024px) {
  .main-nav { display: none; }
  .hamburger { display: inline-flex; }
  .page-hero h1 { font-size: 30px; }
  .service-detail { padding: var(--space-mobile) 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .detail-content { padding: 28px 24px 12px; }
  .detail-block h2 { font-size: 22px; }
  .cta-band h2 { font-size: 24px; }
}
@media screen and (max-width: 640px) {
  .container { padding: 0 16px; }
  .page-hero { padding: 48px 0 40px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero .lead { font-size: 16px; }
  .hero-tags { gap: 8px; }
  .service-detail .row { margin-left: 0; margin-right: 0; }
  .service-detail .columns { padding-left: 16px; padding-right: 16px; }
  .anchor-nav {
    position: static;
    top: auto;
    margin-bottom: 24px;
    border-radius: 10px;
  }
  .detail-content {
    padding: 24px 16px 12px;
    border-radius: 10px;
  }
  .detail-block {
    padding-bottom: 32px;
    margin-bottom: 32px;
  }
  .detail-block .content-img { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-main { padding: 40px 0 24px; }
  .cta-band { padding: 48px 0; }
  .cta-band p { font-size: 15px; }
  .logo { font-size: 21px; }
  .mobile-menu { top: 64px; }
}