/* roulang page: index */
:root {
  --primary: #2B5A8C;
  --primary-dark: #1F4266;
  --primary-light: #E8F0F8;
  --accent: #F07C5A;
  --accent-dark: #d96545;
  --bg-body: #F7FAFD;
  --bg-card: #FFFFFF;
  --bg-soft: #EDF3F8;
  --title-color: #132A3B;
  --body-color: #3E5265;
  --muted-color: #7A8B9C;
  --border-color: #E3EBF3;
  --radius-lg: 12px;
  --radius-sm: 8px;
  --radius-tag: 4px;
  --shadow-card: 0 1px 3px rgba(19,42,59,0.06), 0 4px 12px rgba(19,42,59,0.04);
  --shadow-hover: 0 8px 24px rgba(19,42,59,0.08);
  --shadow-nav: 0 2px 8px rgba(19,42,59,0.04);
  --transition: all .25s ease;
  --font-family: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-family);background:var(--bg-body);color:var(--body-color);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border:none;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;transition:var(--transition);text-decoration:none;line-height:1.2}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);color:#fff;transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:#fff;border:1px solid var(--primary);color:var(--primary)}
.btn-secondary:hover{background:var(--primary-light);color:var(--primary-dark)}
.btn-ghost{background:rgba(255,255,255,.15);color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.28);color:#fff}
.btn-lg{padding:14px 32px;font-size:16px}
.btn-sm{padding:9px 18px;font-size:14px}
:focus{outline:3px solid rgba(43,90,140,.3);outline-offset:2px}

.section-block{padding:72px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-bottom:40px}
.section-title{font-size:28px;font-weight:700;color:var(--title-color);line-height:1.4;position:relative;padding-left:16px}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:4px;background:var(--accent)}
.section-sub{font-size:15px;color:var(--muted-color);margin-top:7px}
.section-link{font-size:14px;font-weight:600;color:var(--primary)}
.section-link:hover{color:var(--primary-dark)}

.site-header{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-nav);height:72px}
.nav-wrap{display:flex;align-items:center;gap:24px;height:72px;max-width:1280px}
.logo-block{flex-shrink:0}
.brand-logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-icon{position:relative;width:34px;height:34px;flex-shrink:0}
.logo-icon::before{content:"";position:absolute;top:2px;left:2px;width:18px;height:18px;background:var(--primary);border-radius:4px;transform:rotate(15deg)}
.logo-icon::after{content:"";position:absolute;bottom:2px;right:2px;width:18px;height:18px;background:var(--accent);border-radius:4px;transform:rotate(15deg)}
.logo-icon span{position:absolute;z-index:2}
.logo-icon span.dot1{top:6px;right:4px;width:7px;height:7px;border-radius:50%;background:#E8A33D}
.logo-icon span.dot2{bottom:5px;left:4px;width:5px;height:5px;border-radius:50%;background:#fff}
.logo-title{font-size:22px;font-weight:700;color:var(--title-color);letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:4px;flex:1}
.nav-link{display:inline-block;padding:8px 14px;font-size:15px;font-weight:500;color:#3E5265;border-radius:6px;position:relative;white-space:nowrap}
.nav-link:hover{color:var(--primary);background:rgba(43,90,140,.05)}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--primary);border-radius:2px;opacity:0;transform:scaleX(.5);transition:var(--transition)}
.nav-link:hover::after{opacity:1;transform:scaleX(1)}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{opacity:1;transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-field{position:relative;width:180px}
.search-field input{width:100%;height:38px;border:1px solid transparent;background:#F2F6FB;border-radius:20px;padding:0 38px 0 14px;font-size:14px;color:var(--title-color);transition:var(--transition)}
.search-field input::placeholder{color:#9AABBC}
.search-field input:focus{background:#fff;border-color:var(--primary);box-shadow:0 0 0 3px rgba(43,90,140,.08)}
.search-field i{position:absolute;right:13px;top:50%;transform:translateY(-50%);color:#9AABBC;font-size:14px;pointer-events:none}
.nav-cta{white-space:nowrap}
.menu-toggle{display:none;flex-direction:column;justify-content:center;gap:4px;width:44px;height:44px;background:transparent;border:none;cursor:pointer;padding:8px}
.menu-toggle span{display:block;height:2px;width:22px;background:var(--title-color);border-radius:2px;transition:var(--transition)}
.menu-toggle.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle.active span:nth-child(2){opacity:0}
.menu-toggle.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.hero-block{background:linear-gradient(180deg,#fff 0%,var(--bg-body) 100%);padding:56px 0 64px;position:relative;border-bottom:1px solid var(--border-color)}
.hero-block::before{content:"";position:absolute;inset:0;background-image:radial-gradient(var(--primary) 0.5px,transparent 0.5px);background-size:22px 22px;opacity:.06;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:55% 45%;gap:48px;align-items:center;position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:7px;background:var(--primary-light);color:var(--primary-dark);font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:20px}
.hero-badge i{font-size:12px}
.hero-title{font-size:36px;line-height:1.3;font-weight:700;color:var(--title-color);margin-bottom:18px}
.hero-title .brand-highlight{color:var(--primary)}
.hero-subtitle{font-size:16px;color:var(--body-color);line-height:1.75;max-width:520px;margin-bottom:28px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.hero-stats{display:flex;gap:36px;flex-wrap:wrap;border-top:1px solid var(--border-color);padding-top:24px}
.hero-stat{display:flex;flex-direction:column}
.hero-stat em{font-style:normal;font-size:26px;font-weight:700;color:var(--primary);line-height:1.2}
.hero-stat span{font-size:13px;color:var(--muted-color);margin-top:4px}
.hero-visual{position:relative}
.hero-img{border-radius:16px;box-shadow:0 12px 40px rgba(19,42,59,.14);width:100%;height:360px;object-fit:cover}
.hero-float-card{position:absolute;left:-20px;bottom:28px;background:#fff;border-radius:12px;box-shadow:0 8px 24px rgba(19,42,59,.12);padding:14px 18px;display:flex;align-items:center;gap:12px;max-width:260px;border:1px solid var(--border-color)}
.hero-float-card .float-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(240,124,90,.2);flex-shrink:0}
.hero-float-card strong{display:block;font-size:14px;color:var(--title-color)}
.hero-float-card p{font-size:12px;color:var(--muted-color);margin:2px 0 0}

.latest-section{background:#fff;border-bottom:1px solid var(--border-color)}
.news-scroll{overflow-x:auto;padding-bottom:10px;scrollbar-width:thin;scrollbar-color:#d0d9e2 transparent}
.news-scroll::-webkit-scrollbar{height:6px}
.news-scroll::-webkit-scrollbar-thumb{background:#d0d9e2;border-radius:8px}
.news-track{display:flex;gap:20px;min-width:max-content}
.news-card{display:flex;flex-direction:column;width:320px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:22px;text-decoration:none;transition:var(--transition);position:relative}
.news-card:hover{border-color:transparent;box-shadow:var(--shadow-hover);transform:translateY(-3px);color:inherit}
.news-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.news-badge{display:inline-block;background:var(--primary-light);color:var(--primary-dark);font-size:12px;font-weight:600;padding:3px 10px;border-radius:var(--radius-tag)}
.news-time{font-size:12px;color:var(--muted-color)}
.news-title{font-size:17px;font-weight:600;color:var(--title-color);line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-excerpt{font-size:13px;color:var(--muted-color);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px}
.news-more{font-size:13px;font-weight:600;color:var(--primary);display:flex;align-items:center;gap:4px}
.news-more i{transition:transform .25s ease}
.news-card:hover .news-more i{transform:translateX(4px)}
.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg-soft);border-radius:var(--radius-lg);padding:48px 24px;min-height:180px;text-align:center}
.empty-state i{font-size:38px;color:#b8c6d4;margin-bottom:14px}
.empty-state p{font-size:15px;color:var(--muted-color)}

.cat-section{background:var(--bg-body)}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);transition:var(--transition);display:flex;flex-direction:column}
.cat-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.cat-card img{width:100%;height:180px;object-fit:cover;transition:transform .35s ease}
.cat-card:hover img{transform:scale(1.03)}
.cat-card.cat-large{grid-column:span 2}
.cat-card.cat-large img{height:220px}
.cat-content{display:flex;flex-direction:column;flex:1;padding:22px 24px 24px}
.cat-tag{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;color:var(--accent-dark);background:rgba(240,124,90,.1);padding:4px 10px;border-radius:var(--radius-tag);align-self:flex-start;margin-bottom:12px}
.cat-title{font-size:20px;font-weight:600;color:var(--title-color);margin-bottom:8px}
.cat-desc{font-size:14px;color:var(--body-color);line-height:1.7;margin-bottom:16px;flex:1}
.cat-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.cat-link i{transition:transform .25s ease}
.cat-card:hover .cat-link i{transform:translateX(4px)}

.hot-section{background:#fff;border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color)}
.hot-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.hot-card{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);transition:var(--transition);text-decoration:none;display:flex;flex-direction:column}
.hot-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-3px);color:inherit}
.hot-card img{width:100%;height:160px;object-fit:cover}
.hot-feature{grid-column:span 2;grid-row:span 2;flex-direction:row}
.hot-feature img{height:100%;width:50%;object-fit:cover;min-height:300px}
.hot-feature .hot-body{flex:1;padding:28px;display:flex;flex-direction:column}
.hot-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.hot-badge{font-size:12px;font-weight:600;color:var(--primary-dark);background:var(--primary-light);display:inline-block;padding:4px 10px;border-radius:var(--radius-tag);align-self:flex-start;margin-bottom:10px}
.hot-card h3{font-size:18px;font-weight:600;color:var(--title-color);line-height:1.5;margin-bottom:8px}
.hot-card p{font-size:13px;color:var(--muted-color);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:14px;flex:1}
.hot-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border-color);padding-top:12px;margin-top:auto}
.hot-meta{font-size:12px;color:var(--muted-color)}
.hot-more{font-size:13px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:5px}
.hot-more i{transition:transform .25s ease}
.hot-card:hover .hot-more i{transform:translateX(4px)}
.hot-feature h3{font-size:22px}
.hot-feature p{font-size:14px;-webkit-line-clamp:3}

.stats-band{background:var(--primary);padding:52px 0;position:relative;overflow:hidden}
.stats-band::before{content:"";position:absolute;top:-40px;right:-40px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,.06)}
.stats-band::after{content:"";position:absolute;bottom:-60px;left:10%;width:180px;height:180px;border-radius:50%;background:rgba(255,255,255,.04)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;position:relative;z-index:1}
.stats-box{display:flex;flex-direction:column;align-items:center;text-align:center;padding:8px}
.stats-box i{font-size:28px;color:#fff;opacity:.85;margin-bottom:10px}
.stats-num{font-size:34px;font-weight:700;color:#fff;line-height:1.2;margin-bottom:4px}
.stats-label{font-size:14px;color:rgba(255,255,255,.82)}
.stats-box small{font-size:12px;color:rgba(255,255,255,.6);margin-top:2px}

.testi-section{background:var(--bg-body);padding:72px 0}
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi-card{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:26px;display:flex;flex-direction:column;transition:var(--transition)}
.testi-card:hover{box-shadow:var(--shadow-hover)}
.testi-stars{color:#E8A33D;font-size:15px;letter-spacing:2px;margin-bottom:14px}
.testi-card blockquote{font-size:15px;color:var(--body-color);line-height:1.75;font-style:normal;margin:0 0 20px;flex:1}
.testi-card blockquote::before{content:"“";font-size:28px;color:var(--primary-light);font-family:Georgia,serif;margin-right:2px}
.testi-footer{display:flex;align-items:center;gap:12px;border-top:1px solid var(--border-color);padding-top:16px}
.avatar{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:50%;font-size:14px;font-weight:600;color:#fff;flex-shrink:0}
.avatar-1{background:#2B5A8C}
.avatar-2{background:#F07C5A}
.avatar-3{background:#6B8FA3}
.testi-name{font-size:14px;font-weight:600;color:var(--title-color)}
.testi-role{font-size:12px;color:var(--muted-color)}

.faq-section{background:#fff;padding:72px 0}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--border-color);border-radius:var(--radius-lg);margin-bottom:14px;overflow:hidden;transition:var(--transition)}
.faq-item:hover{border-color:var(--primary-light)}
.faq-item.active{box-shadow:var(--shadow-hover)}
.faq-question{display:flex;align-items:center;justify-content:space-between;width:100%;background:transparent;border:none;padding:18px 22px;font-size:15px;font-weight:600;color:var(--title-color);cursor:pointer;text-align:left;transition:background .25s ease;border-left:4px solid var(--primary)}
.faq-question:hover{background:var(--bg-body)}
.faq-icon{width:20px;height:20px;position:relative;flex-shrink:0;margin-left:12px}
.faq-icon::before{content:"";position:absolute;top:9px;left:2px;right:2px;height:2px;background:var(--primary);border-radius:2px}
.faq-icon::after{content:"";position:absolute;top:2px;bottom:2px;left:9px;width:2px;background:var(--primary);border-radius:2px;transition:transform .3s ease}
.faq-item.active .faq-icon::after{transform:scaleY(0)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease, padding .25s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:320px;padding:0 24px 20px}
.faq-answer p{font-size:14px;color:var(--body-color);line-height:1.75}

.cta-section{background:var(--bg-body);padding:72px 0}
.cta-card{background:linear-gradient(135deg,#1F4266 0%,#2B5A8C 60%,#35688F 100%);border-radius:18px;padding:60px 48px;text-align:center;position:relative;overflow:hidden}
.cta-card::before{content:"";position:absolute;top:-50px;right:-30px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.06)}
.cta-card::after{content:"";position:absolute;bottom:-70px;left:8%;width:200px;height:200px;border-radius:50%;background:rgba(255,255,255,.04)}
.cta-card h2{color:#fff;font-size:28px;font-weight:700;margin-bottom:12px;position:relative;z-index:1}
.cta-card p{color:rgba(255,255,255,.8);font-size:15px;margin-bottom:22px;position:relative;z-index:1}
.cta-btns{display:flex;justify-content:center;gap:14px;position:relative;z-index:1;margin-bottom:20px;flex-wrap:wrap}
.cta-contact{font-size:13px;color:rgba(255,255,255,.55);position:relative;z-index:1;margin-bottom:0}

.site-footer{background:var(--bg-soft);border-top:1px solid var(--border-color);padding-top:56px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.footer-brand p{font-size:14px;color:var(--muted-color);margin-top:8px;line-height:1.7;max-width:260px}
.footer-logo{font-size:20px;font-weight:700;color:var(--title-color);display:flex;align-items:center;gap:8px}
.footer-logo .logo-icon{width:28px;height:28px}
.footer-col h4{font-size:15px;font-weight:600;color:var(--title-color);margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:var(--body-color);padding:5px 0;transition:var(--transition)}
.footer-col a:hover{color:var(--primary);padding-left:6px}
.footer-col p{font-size:14px;color:var(--body-color);line-height:1.7;margin-bottom:6px}
.footer-bottom{border-top:1px solid var(--border-color);padding:20px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom span{font-size:13px;color:var(--muted-color)}

@media (max-width:1024px){
  .nav-wrap{gap:12px;padding:0 16px}
  .search-field{width:130px}
  .nav-link{padding:8px 8px;font-size:14px}
  .hero-title{font-size:30px}
  .hot-grid{grid-template-columns:repeat(2,1fr)}
  .hot-feature{grid-column:span 2;grid-row:auto;flex-direction:row}
  .hot-feature img{width:48%;height:auto;min-height:0}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .testi-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .hero-grid{grid-template-columns:1fr;gap:32px;padding-top:24px}
  .hero-visual{order:-1}
  .hero-img{height:220px}
  .hero-float-card{left:12px;bottom:-18px}
  .category-grid{grid-template-columns:1fr 1fr}
  .cat-card.cat-large{grid-column:span 2}
  .cat-card.cat-large img{height:180px}
  .hot-grid{grid-template-columns:1fr}
  .hot-feature{grid-column:span 1;flex-direction:column}
  .hot-feature img{width:100%;min-height:180px}
  .testi-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:640px){
  .section-block{padding:52px 0}
  body{font-size:15px}
  .logo-title{font-size:19px}
  .logo-icon{width:28px;height:28px}
  .site-header{height:64px}
  .nav-wrap{height:64px}
  .search-field{display:none}
  .nav-actions{gap:6px}
  .nav-cta{font-size:13px;padding:8px 14px}
  .menu-toggle{display:flex}
  .main-nav{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border-color);box-shadow:0 12px 32px rgba(19,42,59,.14);padding:16px 20px;gap:4px;max-height:0;overflow:hidden;visibility:hidden;opacity:0;transition:max-height .3s ease,opacity .25s ease,visibility .25s}
  .main-nav.open{max-height:420px;visibility:visible;opacity:1}
  .nav-link{display:block;padding:12px 10px;font-size:15px;border-radius:8px}
  .nav-link::after{display:none}
  .nav-link.active{background:var(--primary-light)}
  .hero-title{font-size:26px}
  .hero-subtitle{font-size:15px}
  .section-title{font-size:22px}
  .section-head{margin-bottom:28px}
  .category-grid{grid-template-columns:1fr}
  .cat-card.cat-large{grid-column:span 1}
  .cat-card img,.cat-card.cat-large img{height:150px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:18px}
  .stats-num{font-size:28px}
  .cta-card{padding:40px 24px}
  .cta-card h2{font-size:22px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: category1 */
:root {
  --primary: #2B5A8C;
  --primary-dark: #1F4266;
  --primary-light: #E8F0F8;
  --accent: #F07C5A;
  --accent-dark: #d96b4f;
  --bg: #F7FAFD;
  --bg-alt: #F2F6FB;
  --card-bg: #ffffff;
  --heading: #132A3B;
  --text: #3E5265;
  --muted: #7A8B9C;
  --border: #E3EBF3;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 4px;
  --radius-search: 20px;
  --shadow-card: 0 1px 3px rgba(19,42,59,0.06), 0 4px 12px rgba(19,42,59,0.04);
  --shadow-hover: 0 8px 24px rgba(19,42,59,0.08);
  --shadow-nav: 0 2px 8px rgba(19,42,59,0.04);
  --spacing-section: 80px;
  --container: 1200px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: var(--primary); transition: color 0.25s ease; }
a:hover { color: var(--primary-dark); }
button, input { font-family: inherit; }
ul, ol { list-style: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-nav);
  height: 72px;
  backdrop-filter: blur(8px);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 16px rgba(19, 42, 59, 0.08); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 22px;
  color: var(--heading);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand-logo:hover { color: var(--heading); }
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex-shrink: 0;
}
.logo-icon span { width: 9px; height: 9px; border-radius: 50%; display: block; }
.logo-icon .dot1 { background: var(--primary); }
.logo-icon .dot2 { background: var(--accent); }
.logo-icon .dot3 { background: #E8A33D; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 6px;
  position: relative;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border-radius: var(--radius-search);
  padding: 8px 16px;
  gap: 8px;
  width: 200px;
  border: 1px solid transparent;
  transition: all 0.25s ease;
}
.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(43, 90, 140, 0.15);
}
.search-box i { color: var(--muted); font-size: 14px; }
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 14px;
  color: var(--heading);
}
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  cursor: pointer;
  line-height: 0;
  flex-shrink: 0;
}
.menu-toggle .bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--heading);
  margin: 3px 0;
  border-radius: 2px;
  transition: all 0.3s ease;
}
.menu-toggle.open .bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.menu-toggle.open .bar:nth-child(2) { opacity: 0; }
.menu-toggle.open .bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ========== Button ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
}
.btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(240, 124, 90, 0.3); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-primary:focus-visible { outline: 3px solid rgba(240, 124, 90, 0.4); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--primary);
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
}
.btn-secondary:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary:active { transform: translateY(0); }
.btn-small { padding: 9px 18px; font-size: 14px; }

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 55%, #dfeaf4 100%);
  padding: 72px 0 68px;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center center;
  opacity: 0.14;
  z-index: 0;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.92) 35%, rgba(255, 255, 255, 0.5) 100%);
  z-index: 1;
}
.page-hero .container { position: relative; z-index: 2; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--muted); font-size: 13px; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #c0cedd; }
.breadcrumb .current { color: var(--text); font-weight: 500; }
.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--heading);
  margin-bottom: 18px;
}
.hero-sub {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  max-width: 620px;
  margin-bottom: 28px;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--border);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}
.hero-tags span i { color: var(--accent); font-size: 12px; }

/* ========== Section Blocks ========== */
.section-block { padding: var(--spacing-section) 0; }
.section-block.alt { background: var(--bg-alt); }
.section-block .container > .section-head { margin-bottom: 48px; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--heading); margin-bottom: 12px; line-height: 1.4; }
.section-head p { color: var(--muted); max-width: 660px; margin: 0 auto; font-size: 15px; line-height: 1.7; }

/* ========== Split Section ========== */
.split-section { padding: var(--spacing-section) 0; }
.split-grid {
  display: flex;
  align-items: center;
  gap: 60px;
}
.split-media { flex: 0 0 46%; }
.split-media img {
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
}
.split-content { flex: 1; }
.split-content h2 { font-size: 30px; font-weight: 700; color: var(--heading); margin-bottom: 16px; line-height: 1.4; }
.split-content p { margin-bottom: 20px; line-height: 1.8; color: var(--text); }
.split-content p:last-of-type { margin-bottom: 24px; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.tag-list span {
  background: var(--primary-light);
  color: var(--primary);
  padding: 5px 12px;
  border-radius: var(--radius-tag);
  font-size: 13px;
  font-weight: 500;
}

/* ========== Cards Grid ========== */
.cards-grid .card-hover {
  height: 100%;
  background: var(--card-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.cards-grid .card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.card-media { overflow: hidden; aspect-ratio: 16/10; background: var(--bg-alt); }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card-hover:hover .card-media img { transform: scale(1.04); }
.card-body { padding: 24px 26px 22px; display: flex; flex-direction: column; flex: 1; }
.card-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-tag);
  margin-bottom: 12px;
  align-self: flex-start;
}
.card-body h3 { font-size: 19px; font-weight: 600; color: var(--heading); margin-bottom: 10px; line-height: 1.5; }
.card-body p { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.card-link i { font-size: 12px; transition: transform 0.25s ease; }
.card-link:hover { color: var(--primary-dark); }
.card-link:hover i { transform: translateX(4px); }

/* ========== Index List ========== */
.index-list { display: flex; flex-direction: column; }
.index-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
  transition: background 0.3s ease;
}
.index-item:last-child { border-bottom: none; }
.index-item::before {
  content: "";
  width: 3px;
  height: 42px;
  background: var(--primary);
  border-radius: 3px;
  opacity: 0.25;
  flex-shrink: 0;
}
.index-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 18px;
  flex-shrink: 0;
}
.index-info { flex: 1; min-width: 0; }
.index-info h3 { font-size: 17px; font-weight: 600; color: var(--heading); margin-bottom: 4px; }
.index-info p { font-size: 14px; color: var(--muted); margin: 0; max-width: 620px; }
.index-meta { text-align: right; flex-shrink: 0; font-size: 13px; color: var(--muted); display: flex; flex-direction: column; align-items: flex-end; gap: 6px; }
.index-meta .label {
  background: var(--bg-alt);
  padding: 3px 10px;
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  display: inline-block;
}

/* ========== Scenario Cards ========== */
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 36px 30px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  text-align: center;
  transition: all 0.3s ease;
}
.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.scenario-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 20px;
  border-radius: 16px;
  background: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 24px;
}
.scenario-card h3 { font-size: 18px; font-weight: 600; color: var(--heading); margin-bottom: 10px; }
.scenario-card p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.7; }

/* ========== Steps ========== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-item { position: relative; text-align: center; padding: 0 12px; }
.step-num {
  width: 50px;
  height: 50px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(43, 90, 140, 0.25);
}
.step-item:nth-child(even) .step-num { background: var(--accent); box-shadow: 0 6px 16px rgba(240, 124, 90, 0.25); }
.step-item h3 { font-size: 17px; font-weight: 600; color: var(--heading); margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.7; }
.step-item:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 25px;
  right: -22px;
  width: 32px;
  height: 1px;
  background: var(--border);
}

/* ========== FAQ ========== */
.faq-list { max-width: 840px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}
.faq-item.open { box-shadow: var(--shadow-hover); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  min-height: 56px;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--primary); }
.faq-question i { transition: transform 0.3s ease; color: var(--primary); font-size: 15px; flex-shrink: 0; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.85;
  display: none;
}
.faq-item.open .faq-answer { display: block; }
.faq-answer p { margin-bottom: 10px; }
.faq-answer p:last-child { margin-bottom: 0; }

/* ========== CTA ========== */
.cta-section { padding: var(--spacing-section) 0; }
.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 20px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.cta-box::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}
.cta-box h2 { font-size: 32px; font-weight: 700; margin-bottom: 14px; color: #fff; position: relative; z-index: 1; }
.cta-box p { font-size: 16px; opacity: 0.92; margin-bottom: 32px; max-width: 520px; margin-left: auto; margin-right: auto; position: relative; z-index: 1; }
.cta-links { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; position: relative; z-index: 1; }
.cta-box .btn-primary { background: #fff; color: var(--primary); font-weight: 700; box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12); }
.cta-box .btn-primary:hover { background: var(--primary-light); color: var(--primary-dark); box-shadow: 0 10px 24px rgba(0, 0, 0, 0.16); transform: translateY(-2px); }
.cta-box .btn-secondary { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.7); }
.cta-box .btn-secondary:hover { background: rgba(255, 255, 255, 0.1); color: #fff; border-color: #fff; }

/* ========== Footer ========== */
.site-footer {
  background: #edf3f8;
  border-top: 1px solid var(--border);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 16px;
}
.footer-brand p { font-size: 14px; color: var(--muted); line-height: 1.8; max-width: 320px; }
.footer-col h4 { font-size: 16px; font-weight: 600; color: var(--heading); margin-bottom: 16px; }
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text);
  padding: 6px 0;
  transition: all 0.2s ease;
}
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-col p { font-size: 14px; color: var(--muted); padding: 4px 0; margin: 0; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .header-inner { gap: 10px; }
  .main-nav { gap: 2px; }
  .nav-link { padding: 10px 12px; font-size: 14px; }
  .search-box { width: 160px; }
  .split-grid { gap: 36px; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .step-item:not(:last-child)::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand p { max-width: none; }
}

@media (max-width: 640px) {
  :root { --spacing-section: 56px; }
  .container { padding: 0 20px; }
  .site-header { height: 62px; }
  .header-inner { gap: 8px; }
  .brand-logo { font-size: 18px; }
  .logo-icon { width: 32px; height: 32px; border-radius: 8px; }
  .logo-icon span { width: 8px; height: 8px; }
  .menu-toggle { display: block; }
  .main-nav {
    display: none;
    position: fixed;
    top: 62px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(19, 42, 59, 0.08);
    align-items: stretch;
    gap: 4px;
    max-height: calc(100vh - 62px);
    overflow-y: auto;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 12px 16px; font-size: 15px; }
  .nav-link.active { background: var(--primary-light); }
  .nav-link.active::after { left: 16px; right: auto; width: 24px; }
  .header-actions .search-box { display: none; }
  .header-actions .btn-primary { padding: 8px 14px; font-size: 13px; }
  .page-hero { padding: 48px 0 42px; }
  .page-hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .breadcrumb { margin-bottom: 16px; }
  .split-section { padding: var(--spacing-section) 0; }
  .split-grid { flex-direction: column; gap: 24px; }
  .split-media { flex: 0 0 auto; }
  .split-content h2 { font-size: 24px; }
  .section-head h2 { font-size: 24px; }
  .section-block .container > .section-head { margin-bottom: 32px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .step-item { padding: 16px 0; }
  .step-item:not(:last-child)::after { display: none; }
  .index-item { flex-wrap: wrap; gap: 12px; padding: 18px 0; }
  .index-icon { width: 40px; height: 40px; font-size: 16px; }
  .index-info h3 { font-size: 15px; }
  .index-info p { font-size: 13px; }
  .index-meta { text-align: left; align-items: flex-start; }
  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px 18px; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 24px; }
  .cta-links { flex-direction: column; align-items: center; }
  .cta-links .btn-primary,
  .cta-links .btn-secondary { width: 100%; }
  .cards-grid .cell { padding: 0 0 20px !important; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-bottom span { display: block; }
}

@media (max-width: 360px) {
  .brand-logo { font-size: 16px; }
  .nav-link { font-size: 14px; }
  .header-actions .btn-primary { padding: 6px 10px; font-size: 12px; }
}

/* roulang page: article */
:root {
  --primary: #2B5A8C;
  --primary-dark: #1F4266;
  --primary-light: #E8F0F8;
  --accent: #F07C5A;
  --bg: #F7FAFD;
  --card: #FFFFFF;
  --text: #132A3B;
  --text-body: #3E5265;
  --text-weak: #7A8B9C;
  --border: #E3EBF3;
  --shadow-sm: 0 1px 3px rgba(19,42,59,0.06), 0 4px 12px rgba(19,42,59,0.04);
  --shadow-md: 0 8px 24px rgba(19,42,59,0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

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

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
button, input { font-family: inherit; }

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(19,42,59,0.04);
  transition: box-shadow .3s;
}
.site-header.scrolled {
  box-shadow: 0 4px 16px rgba(19,42,59,0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
}
.logo:hover { color: var(--primary); }
.logo-icon {
  width: 34px;
  height: 34px;
  position: relative;
  background: var(--primary);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-icon .dot1,
.logo-icon .dot2 {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  position: absolute;
}
.logo-icon .dot1 { background: var(--accent); top: 7px; left: 7px; }
.logo-icon .dot2 { background: #fff; bottom: 7px; right: 7px; }

.main-nav {
  display: flex;
  gap: 26px;
  margin-left: 8px;
}
.main-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 6px 2px;
  white-space: nowrap;
}
.main-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s;
}
.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
  transform: scaleX(1);
}
.main-nav .nav-link.active { color: var(--primary); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}
.search-box {
  position: relative;
  width: 180px;
}
.search-box input {
  width: 100%;
  height: 36px;
  border: 1px solid transparent;
  background: var(--bg);
  border-radius: 20px;
  padding: 0 38px 0 14px;
  font-size: 14px;
  color: var(--text);
  transition: border .2s, box-shadow .2s;
}
.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(43,90,140,0.12);
}
.search-box i {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-weak);
  font-size: 13px;
  pointer-events: none;
}
.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 9px 20px;
  font-size: 14px;
  font-weight: 600;
  transition: background .2s, transform .2s;
}
.btn-nav:hover { background: #E06743; color: #fff; transform: translateY(-1px); }

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
}
.mobile-nav {
  display: none;
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(19,42,59,0.08);
  padding: 16px 24px;
  z-index: 99;
}
.mobile-nav.open { display: block; }
.mobile-nav .nav-link {
  display: block;
  padding: 12px 0;
  font-size: 16px;
  color: var(--text-body);
  border-bottom: 1px solid rgba(227,235,243,0.5);
  font-weight: 500;
}
.mobile-nav .nav-link:last-child { border-bottom: none; }
.mobile-nav .nav-link.active { color: var(--primary); font-weight: 600; }

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
}
.breadcrumb a { color: var(--text-weak); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #C5D2DE; }
.breadcrumb .current {
  color: var(--text-body);
  font-weight: 500;
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== 文章头部 ===== */
.article-hero {
  background: linear-gradient(135deg, var(--primary-light) 0%, #F7FAFD 100%);
  padding: 56px 0 48px;
  position: relative;
  overflow: hidden;
}
.article-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -40px;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(43,90,140,0.07), transparent 70%);
  border-radius: 50%;
}
.article-hero::after {
  content: "";
  position: absolute;
  bottom: -60px;
  left: 5%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(240,124,90,0.05), transparent 70%);
  border-radius: 50%;
}
.article-hero-inner {
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.article-cat {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 4px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.article-hero h1 {
  font-size: 36px;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
  font-weight: 700;
  word-break: break-word;
}
.article-summary {
  font-size: 15px;
  color: var(--text-body);
  max-width: 680px;
  margin: 0 auto 24px;
  line-height: 1.8;
}
.article-meta {
  display: flex;
  justify-content: center;
  gap: 24px;
  font-size: 13px;
  color: var(--text-weak);
  flex-wrap: wrap;
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta i { color: var(--primary); font-size: 13px; }

/* ===== 正文阅读区 ===== */
.article-main {
  padding: 48px 0 32px;
}
.article-content {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 56px;
  box-shadow: var(--shadow-sm);
  word-break: break-word;
}
.article-content p {
  margin-bottom: 24px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
}
.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin: 40px 0 20px;
  line-height: 1.4;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 32px 0 16px;
  line-height: 1.5;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 12px;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 16px 20px;
  margin: 24px 0;
  border-radius: 0 8px 8px 0;
  color: var(--text);
  font-size: 15px;
}
.article-content ul,
.article-content ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}
.article-content ul li {
  list-style: none;
  position: relative;
  padding-left: 8px;
  margin-bottom: 8px;
}
.article-content ul li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  left: -14px;
  top: 10px;
}
.article-content ol li { margin-bottom: 8px; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.article-content table th {
  background: var(--primary-light);
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text);
  border: 1px solid var(--border);
}
.article-content table td {
  padding: 10px 12px;
  border: 1px solid var(--border);
}
.article-content pre {
  background: #1F2933;
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 16px;
  font-size: 13px;
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.6;
}
.article-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 13px;
  background: rgba(43,90,140,0.08);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--primary-dark);
}
.article-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}
.article-content img {
  border-radius: var(--radius-sm);
  margin: 24px auto 8px;
  box-shadow: var(--shadow-sm);
}
.article-content figcaption,
.article-content .img-note,
.article-content .image-caption {
  font-size: 12px;
  color: var(--text-weak);
  text-align: center;
  margin-bottom: 16px;
  margin-top: 6px;
}
.article-content a {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: rgba(43,90,140,0.3);
}
.article-content a:hover {
  text-decoration-color: var(--primary);
}
.article-content strong {
  color: var(--text);
  font-weight: 600;
}
.article-content mark {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 0 4px;
  border-radius: 3px;
}
.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* ===== 空状态 ===== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
}
.empty-state i {
  font-size: 48px;
  color: #C5D2DE;
  margin-bottom: 16px;
}
.empty-state h3 {
  font-size: 20px;
  color: var(--text);
  margin-bottom: 8px;
}
.empty-state p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 24px;
}
.btn-primary {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  transition: background .2s, transform .2s;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* ===== 标签组 / 分享 ===== */
.article-tags {
  max-width: 760px;
  margin: 32px auto 0;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.article-tags .tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 4px;
}
.article-share {
  max-width: 760px;
  margin: 24px auto 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.article-share span {
  font-size: 14px;
  color: var(--text-weak);
  margin-right: 4px;
}
.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text-body);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .2s;
}
.share-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 64px 0 72px;
}
.related-section h2 {
  font-size: 28px;
  color: var(--text);
  text-align: center;
  margin-bottom: 8px;
  font-weight: 700;
}
.related-sub {
  text-align: center;
  color: var(--text-weak);
  font-size: 14px;
  margin-bottom: 32px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.related-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .25s;
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.related-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}
.related-card .card-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.related-card h3 {
  font-size: 18px;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.5;
}
.related-card h3 a { color: inherit; }
.related-card h3 a:hover { color: var(--primary); }
.related-card p {
  font-size: 14px;
  color: var(--text-weak);
  margin-bottom: 16px;
  line-height: 1.6;
  flex: 1;
}
.related-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.card-tag {
  font-size: 12px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 500;
}
.card-link {
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.card-link:hover { color: #E06743; }

/* ===== CTA ===== */
.cta-section {
  padding: 72px 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -40px;
  right: 10%;
  width: 240px;
  height: 240px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 5%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.04);
  border-radius: 50%;
}
.cta-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}
.cta-inner h2 {
  color: #fff;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-inner p {
  color: rgba(255,255,255,0.8);
  font-size: 15px;
  margin-bottom: 32px;
  line-height: 1.7;
}
.btn-cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  padding: 14px 36px;
  border-radius: var(--radius-sm);
  transition: all .2s;
}
.btn-cta:hover {
  background: #E06743;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(240,124,90,0.3);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #EDF3F8;
  border-top: 1px solid var(--border);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 10px;
  line-height: 1.6;
}
.footer-col a:hover { color: var(--primary); }
.footer-col p {
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 8px;
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(227,235,243,0.6);
  padding: 16px 0;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-weak);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .header-inner { gap: 16px; }
  .main-nav { gap: 14px; }
  .main-nav .nav-link { font-size: 14px; }
  .search-box { width: 150px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-content { padding: 40px 36px; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .header-inner { height: 64px; gap: 12px; }
  .logo { font-size: 18px; }
  .logo-icon { width: 30px; height: 30px; }
  .main-nav { display: none; }
  .search-box { display: none; }
  .hamburger { display: block; }
  .header-actions .btn-nav { padding: 7px 12px; font-size: 12px; font-weight: 600; }
  .mobile-nav { top: 64px; }

  .breadcrumb .current { max-width: 200px; }

  .article-hero { padding: 40px 0 32px; }
  .article-hero h1 { font-size: 26px; }
  .article-summary { font-size: 14px; margin-bottom: 20px; }
  .article-meta { gap: 14px; flex-direction: column; align-items: center; }

  .article-main { padding: 24px 0 16px; }
  .article-content { padding: 24px 20px; border-radius: 8px; }
  .article-content p { font-size: 15px; margin-bottom: 20px; }
  .article-content h2 { font-size: 22px; margin: 32px 0 16px; }
  .article-content h3 { font-size: 18px; margin: 24px 0 12px; }
  .article-content table { font-size: 13px; }
  .article-content pre { font-size: 12px; padding: 12px; }

  .article-tags { margin-top: 24px; }
  .article-share { flex-wrap: wrap; }

  .related-section { padding: 48px 0 56px; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .related-card img { height: 140px; }

  .cta-section { padding: 56px 0; }
  .cta-inner h2 { font-size: 24px; }
  .cta-inner p { font-size: 14px; margin-bottom: 24px; }
  .btn-cta { font-size: 14px; padding: 12px 28px; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; padding: 16px 0 24px; }
}

@media (max-width: 480px) {
  .header-actions .btn-nav { display: none; }
  .article-content { padding: 20px 16px; }
  .related-card h3 { font-size: 16px; }
}

/* roulang page: category2 */
:root {
    --primary: #2B5A8C;
    --primary-dark: #1F4266;
    --primary-light: #E8F0F8;
    --accent: #F07C5A;
    --accent-dark: #E06949;
    --bg: #F7FAFD;
    --card-bg: #FFFFFF;
    --text-heading: #132A3B;
    --text-body: #3E5265;
    --text-muted: #7A8B9C;
    --border: #E3EBF3;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-tag: 4px;
    --shadow-card: 0 1px 3px rgba(19,42,59,0.06), 0 4px 12px rgba(19,42,59,0.04);
    --shadow-hover: 0 8px 24px rgba(19,42,59,0.08);
    --shadow-nav: 0 2px 8px rgba(19,42,59,0.04);
    --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --space-section: 80px;
    --space-section-sm: 48px;
  }
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text-body);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; height: auto; }
  a { color: var(--primary); text-decoration: none; transition: color .2s ease, background .2s ease, box-shadow .2s ease; }
  a:hover { color: var(--primary-dark); }
  ul, ol { list-style: none; }
  button { background: none; border: none; cursor: pointer; font-family: inherit; }
  input, textarea, select { font-family: inherit; font-size: 14px; outline: none; }
  .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
  .container-fluid { width: 100%; }

  /* Buttons */
  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 12px 24px; border-radius: var(--radius-btn);
    font-size: 15px; font-weight: 600; line-height: 1;
    border: 1px solid transparent; cursor: pointer;
    transition: all .2s ease; text-align: center; white-space: nowrap;
  }
  .btn-primary { background: var(--accent); color: #fff; }
  .btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(240,124,90,.25); }
  .btn-primary:active { transform: translateY(0); box-shadow: none; }
  .btn-secondary { background: #fff; border-color: var(--primary); color: var(--primary); }
  .btn-secondary:hover { background: var(--primary-light); color: var(--primary-dark); }
  .btn-outline { background: transparent; border-color: rgba(255,255,255,.6); color: #fff; }
  .btn-outline:hover { background: rgba(255,255,255,.1); color: #fff; border-color: #fff; }
  .btn-sm { padding: 9px 18px; font-size: 14px; }
  .btn-lg { padding: 14px 34px; font-size: 16px; }

  /* Tags & Badges */
  .section-tag {
    display: inline-block; padding: 5px 14px;
    background: rgba(240,124,90,.12); color: var(--accent-dark);
    font-size: 13px; font-weight: 600; border-radius: var(--radius-tag);
    letter-spacing: .5px;
  }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 6px;
    background: rgba(240,124,90,.14); color: var(--accent-dark);
    padding: 6px 16px; border-radius: 20px;
    font-size: 13px; font-weight: 600;
  }
  .hero-badge i { font-size: 12px; }

  /* Header */
  .site-header {
    background: #fff;
    box-shadow: var(--shadow-nav);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 1000;
  }
  .header-inner {
    display: flex; align-items: center;
    height: 72px; gap: 28px;
  }
  .brand-logo {
    display: flex; align-items: center; gap: 12px;
    font-size: 22px; font-weight: 700; color: var(--text-heading);
    white-space: nowrap; flex-shrink: 0;
  }
  .brand-logo:hover { color: var(--text-heading); }
  .logo-icon {
    position: relative; display: inline-block;
    width: 36px; height: 36px;
    background: var(--primary-light);
    border-radius: 8px;
  }
  .logo-icon::before {
    content: ''; position: absolute; top: 50%; left: 50%;
    width: 16px; height: 16px;
    transform: translate(-50%, -50%) rotate(45deg);
    background: var(--primary);
    border-radius: 4px;
  }
  .logo-icon .dot1, .logo-icon .dot2, .logo-icon .dot3 {
    position: absolute; width: 6px; height: 6px; border-radius: 50%; z-index: 2;
  }
  .logo-icon .dot1 { background: var(--accent); top: 6px; left: 10px; }
  .logo-icon .dot2 { background: #fff; top: 14px; right: 7px; }
  .logo-icon .dot3 { background: var(--accent); bottom: 6px; left: 14px; }

  .main-nav { display: flex; align-items: center; gap: 2px; flex: 1; }
  .nav-link {
    padding: 8px 12px; font-size: 15px; font-weight: 500;
    color: var(--text-body); border-radius: 6px;
    position: relative; transition: color .2s ease, background .2s ease;
  }
  .nav-link::after {
    content: ''; position: absolute; left: 12px; right: 12px; bottom: 2px;
    height: 2px; background: var(--primary); border-radius: 2px;
    opacity: 0; transform: scaleX(.4); transition: all .2s ease;
  }
  .nav-link:hover { color: var(--primary); background: var(--primary-light); }
  .nav-link:hover::after, .nav-link.active::after { opacity: 1; transform: scaleX(1); }
  .nav-link.active { color: var(--primary); font-weight: 600; }

  .header-tools { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
  .search-wrap { position: relative; width: 180px; }
  .search-wrap i {
    position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
    font-size: 14px; color: var(--text-muted); pointer-events: none;
  }
  .search-wrap input {
    width: 100%; height: 38px; border-radius: 20px;
    border: 1px solid var(--border); background: var(--bg);
    padding: 0 16px 0 38px; font-size: 14px;
    transition: all .2s ease;
  }
  .search-wrap input:focus {
    border-color: var(--primary); background: #fff;
    box-shadow: 0 0 0 3px rgba(43,90,140,.15);
  }
  .nav-toggle { display: none; font-size: 20px; color: var(--text-heading); padding: 8px; border-radius: 6px; }
  .nav-toggle:hover { background: var(--primary-light); }

  /* Hero */
  .page-hero {
    position: relative; padding: 72px 0 60px;
    background: linear-gradient(120deg, #E8F0F8 0%, #F2F6FB 60%, #F7FAFD 100%);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
  }
  .page-hero::before {
    content: ''; position: absolute; inset: 0;
    background-image: radial-gradient(rgba(43,90,140,.07) 1px, transparent 1px);
    background-size: 26px 26px;
    pointer-events: none;
  }
  .hero-inner {
    position: relative; z-index: 2;
    display: flex; align-items: center; gap: 56px;
  }
  .hero-copy { flex: 1.15; }
  .hero-copy h1 {
    font-size: 38px; font-weight: 700; line-height: 1.3;
    color: var(--text-heading); margin: 18px 0 14px;
    letter-spacing: .5px;
  }
  .hero-sub {
    font-size: 16px; line-height: 1.7; color: var(--text-body);
    max-width: 560px; margin-bottom: 26px;
  }
  .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
  .hero-media { flex: 1; }
  .hero-media img {
    width: 100%; height: 320px; object-fit: cover;
    border-radius: 16px; box-shadow: var(--shadow-hover);
  }

  /* Split Guide Section */
  .guide-split { padding: var(--space-section) 0; }
  .split-block {
    display: flex; align-items: center; gap: 60px;
    margin-bottom: 72px;
  }
  .split-block:last-child { margin-bottom: 0; }
  .split-media { flex: 1; }
  .split-media img {
    width: 100%; height: 340px; object-fit: cover;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform .3s ease, box-shadow .3s ease;
  }
  .split-media img:hover { transform: scale(1.01); box-shadow: var(--shadow-hover); }
  .split-copy { flex: 1; }
  .split-copy h2 {
    font-size: 28px; font-weight: 700; color: var(--text-heading);
    margin: 14px 0 16px; line-height: 1.4;
  }
  .split-copy > p { font-size: 16px; line-height: 1.75; color: var(--text-body); margin-bottom: 20px; }
  .check-list li {
    display: flex; align-items: flex-start; gap: 10px;
    padding: 8px 0; font-size: 15px; color: var(--text-body);
  }
  .check-list li::before {
    content: ''; flex-shrink: 0;
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--primary); margin-top: 8px;
    box-shadow: 0 0 0 3px rgba(43,90,140,.12);
  }
  .right-copy .split-copy { order: -1; }

  /* Steps Section */
  .steps-section {
    padding: var(--space-section) 0;
    background: var(--primary-light);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .section-title {
    font-size: 30px; font-weight: 700; color: var(--text-heading);
    text-align: center; margin-bottom: 12px;
  }
  .section-subtitle {
    text-align: center; color: var(--text-muted); font-size: 15px;
    max-width: 600px; margin: 0 auto 44px;
  }
  .step-card {
    background: #fff; border-radius: var(--radius-card);
    padding: 28px 24px; height: 100%;
    box-shadow: var(--shadow-card); border: 1px solid var(--border);
    transition: transform .25s ease, box-shadow .25s ease;
    position: relative; overflow: hidden;
  }
  .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
  .step-num {
    font-size: 44px; font-weight: 800; line-height: 1;
    color: rgba(43,90,140,.14); margin-bottom: 14px;
    display: block; font-family: Georgia, serif;
  }
  .step-card h3 { font-size: 18px; font-weight: 600; color: var(--text-heading); margin-bottom: 10px; }
  .step-card p { font-size: 14px; line-height: 1.65; color: var(--text-body); }

  /* FAQ Section */
  .faq-section { padding: var(--space-section) 0; }
  .faq-wrap { max-width: 860px; margin: 0 auto; }
  .faq-item {
    background: #fff; border-radius: var(--radius-card);
    border: 1px solid var(--border); box-shadow: var(--shadow-card);
    margin-bottom: 16px; overflow: hidden;
    transition: box-shadow .2s ease;
  }
  .faq-item:hover { box-shadow: var(--shadow-hover); }
  .faq-question {
    width: 100%; text-align: left;
    padding: 18px 22px 18px 26px;
    font-size: 16px; font-weight: 600; color: var(--text-heading);
    display: flex; align-items: center; justify-content: space-between; gap: 16px;
    position: relative; transition: background .2s ease;
    min-height: 54px;
  }
  .faq-question::before {
    content: ''; position: absolute; left: 0; top: 12px; bottom: 12px;
    width: 4px; border-radius: 0 4px 4px 0;
    background: var(--accent);
  }
  .faq-question:hover { background: #FBFDFF; }
  .faq-question .faq-icon {
    flex-shrink: 0; font-size: 16px; color: var(--primary);
    transition: transform .3s ease;
    display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--primary-light);
  }
  .faq-item.open .faq-icon { transform: rotate(180deg); background: var(--primary); color: #fff; }
  .faq-answer {
    display: none; padding: 0 26px 20px;
    font-size: 15px; line-height: 1.75; color: var(--text-body);
  }
  .faq-item.open .faq-answer { display: block; }

  /* CTA Section */
  .cta-section { padding: 24px 0 var(--space-section); }
  .cta-card {
    background: linear-gradient(135deg, #2B5A8C 0%, #1F4266 100%);
    border-radius: 20px; padding: 56px 48px;
    text-align: center; color: #fff; position: relative; overflow: hidden;
    box-shadow: 0 12px 32px rgba(31,66,102,.25);
  }
  .cta-card::before {
    content: ''; position: absolute; top: -40px; right: -40px;
    width: 180px; height: 180px; border-radius: 50%;
    background: rgba(255,255,255,.05);
  }
  .cta-card::after {
    content: ''; position: absolute; bottom: -60px; left: -20px;
    width: 120px; height: 120px; border-radius: 50%;
    background: rgba(240,124,90,.15);
  }
  .cta-card h2 { font-size: 30px; font-weight: 700; margin-bottom: 12px; position: relative; z-index: 1; }
  .cta-card p { font-size: 16px; opacity: .9; margin-bottom: 30px; position: relative; z-index: 1; }
  .cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }

  /* Footer */
  .site-footer {
    background: #EDF3F8; border-top: 1px solid var(--border);
    padding: 56px 0 24px;
  }
  .footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px; margin-bottom: 40px;
  }
  .footer-brand .footer-logo {
    display: flex; align-items: center; gap: 10px;
    font-size: 22px; font-weight: 700; color: var(--text-heading);
    margin-bottom: 14px;
  }
  .footer-brand .logo-icon {
    width: 32px; height: 32px; border-radius: 6px;
  }
  .footer-brand .logo-icon::before { width: 13px; height: 13px; }
  .footer-brand .logo-icon .dot1 { top: 5px; left: 9px; }
  .footer-brand .logo-icon .dot2 { top: 12px; right: 6px; }
  .footer-brand .logo-icon .dot3 { bottom: 5px; left: 12px; }
  .footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; max-width: 320px; }
  .footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text-heading); margin-bottom: 18px; }
  .footer-col a {
    display: block; padding: 5px 0; font-size: 14px; color: var(--text-body);
    transition: color .2s ease, padding-left .2s ease;
  }
  .footer-col a:hover { color: var(--primary); padding-left: 4px; }
  .footer-col p { font-size: 14px; color: var(--text-body); padding: 4px 0; }
  .footer-bottom {
    border-top: 1px solid var(--border); padding-top: 20px;
    display: flex; justify-content: space-between; align-items: center;
    font-size: 13px; color: var(--text-muted); flex-wrap: wrap; gap: 8px;
  }

  /* Responsive */
  @media (max-width: 1024px) {
    :root { --space-section: 64px; }
    .header-inner { gap: 16px; }
    .nav-link { padding: 8px 8px; font-size: 14px; }
    .search-wrap { width: 140px; }
    .hero-inner { gap: 32px; }
    .split-block { gap: 32px; }
  }
  @media (max-width: 640px) {
    :root { --space-section: 48px; }
    .header-inner { gap: 12px; }
    .brand-logo { font-size: 18px; }
    .brand-logo .logo-icon { width: 30px; height: 30px; }
    .nav-toggle { display: block; }
    .search-wrap { display: none; }
    .main-nav {
      position: fixed; top: 72px; left: 0; right: 0;
      background: #fff; flex-direction: column; align-items: stretch;
      padding: 12px 20px 20px; box-shadow: var(--shadow-hover);
      display: none; gap: 2px; border-bottom: 1px solid var(--border);
      max-height: calc(100vh - 72px); overflow-y: auto;
    }
    .main-nav.open { display: flex; }
    .nav-link { padding: 12px 16px; font-size: 15px; }
    .nav-link::after { display: none; }
    .nav-link.active { background: var(--primary-light); border-radius: 8px; }
    .header-cta { padding: 8px 14px; font-size: 13px; }
    .page-hero { padding: 48px 0 40px; }
    .hero-inner { flex-direction: column; gap: 24px; }
    .hero-copy h1 { font-size: 28px; }
    .hero-sub { font-size: 15px; }
    .hero-media img { height: 200px; }
    .split-block { flex-direction: column; gap: 24px; margin-bottom: 48px; }
    .right-copy .split-copy { order: 2; }
    .split-media img { height: 220px; }
    .split-copy h2 { font-size: 24px; }
    .section-title { font-size: 24px; }
    .steps-section .cell { margin-bottom: 16px; }
    .step-card { padding: 20px; }
    .cta-card { padding: 40px 24px; }
    .cta-card h2 { font-size: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .btn-lg { padding: 12px 24px; font-size: 15px; }
  }
  @media (max-width: 480px) {
    .header-cta span { display: none; }
    .btn-secondary, .btn-outline { padding: 10px 18px; font-size: 14px; }
  }

/* roulang page: category3 */
:root {
  --primary: #2B5A8C;
  --primary-dark: #1F4266;
  --primary-light: #E8F0F8;
  --accent: #F07C5A;
  --accent-dark: #D95F3F;
  --bg: #F7FAFD;
  --card-bg: #FFFFFF;
  --text-main: #132A3B;
  --text-body: #3E5265;
  --text-muted: #7A8B9C;
  --border: #E3EBF3;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 4px;
  --shadow-1: 0 1px 3px rgba(19,42,59,0.06), 0 4px 12px rgba(19,42,59,0.04);
  --shadow-2: 0 8px 24px rgba(19,42,59,0.08);
  --nav-h: 72px;
  --spacing-section: 84px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background: var(--bg);
  color: var(--text-body);
  line-height: 1.7;
  font-size: 15px;
}
a {
  color: var(--primary);
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
input,
select,
button {
  font-family: inherit;
  font-size: 14px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.cell {
  margin-bottom: 24px;
}
@media (max-width: 640px) {
  .cell {
    margin-bottom: 20px;
  }
}

/* ===== Header / Nav ===== */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(19,42,59,0.04);
  position: relative;
  z-index: 60;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  height: var(--nav-h);
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--primary-light);
  display: inline-flex;
  position: relative;
  flex-shrink: 0;
}
.logo-icon .dot1 {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--primary);
  position: absolute;
  top: 7px;
  left: 7px;
}
.logo-icon .dot2 {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  position: absolute;
  bottom: 7px;
  right: 7px;
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 6px;
  position: relative;
  transition: color 0.25s;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.5);
  transition: all 0.3s;
}
.nav-link:hover::after {
  opacity: 0.8;
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-search {
  width: 180px;
  height: 36px;
  border-radius: 20px;
  border: 1px solid transparent;
  background: var(--bg);
  padding: 0 16px;
  font-size: 13px;
  color: var(--text-body);
  outline: none;
  transition: all 0.25s;
}
.nav-search:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43,90,140,0.15);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.25s;
  line-height: 1.2;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 10px rgba(240,124,90,0.3);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-outline {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
}
.btn-light {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}
.btn-light:hover {
  background: rgba(255, 255, 255, 0.3);
}
.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 500;
}
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  position: relative;
  transition: all 0.3s;
}
.menu-toggle span::before {
  position: absolute;
  top: -6px;
}
.menu-toggle span::after {
  position: absolute;
  top: 6px;
}
@media (min-width: 641px) and (max-width: 1024px) {
  .nav-search {
    width: 120px;
  }
  .nav-link {
    padding: 8px 9px;
    font-size: 14px;
  }
  .brand-name {
    font-size: 18px;
  }
}
@media (max-width: 640px) {
  .header-inner {
    height: 60px;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(19,42,59,0.08);
    gap: 0;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav .nav-link {
    padding: 12px 8px;
    border-radius: 8px;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link.active {
    background: var(--primary-light);
  }
  .header-tools {
    display: none;
  }
  .brand-name {
    font-size: 18px;
  }
}

/* ===== Compact Hero ===== */
.compact-hero {
  padding: 56px 0 64px;
  background: linear-gradient(135deg, rgba(232,240,248,0.92) 0%, rgba(255,255,255,0.94) 60%, rgba(247,250,253,0.96) 100%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb .sep {
  color: #BFCBD7;
}
.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.7;
  max-width: 620px;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 640px) {
  .compact-hero {
    padding: 40px 0 48px;
  }
  .page-hero h1 {
    font-size: 28px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-actions .btn {
    width: 100%;
  }
}

/* ===== Section Base ===== */
.section {
  padding: var(--spacing-section) 0;
}
.section-head {
  margin-bottom: 40px;
  max-width: 720px;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 1px;
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.7;
}
@media (max-width: 640px) {
  .section {
    padding: 56px 0;
  }
  .section-head h2 {
    font-size: 24px;
  }
}

/* ===== Function Panel ===== */
.function-panel-section {
  background: var(--bg);
}
.panel-wrap {
  align-items: stretch;
}
.panel-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-1);
  padding: 28px;
  height: 100%;
  transition: box-shadow 0.3s;
}
.panel-card:hover {
  box-shadow: var(--shadow-2);
}
.panel-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}
.panel-card label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-body);
  margin-bottom: 8px;
}
.form-select {
  width: 100%;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  padding: 0 14px;
  background: #fff;
  color: var(--text-body);
  font-size: 15px;
  outline: none;
  margin-bottom: 18px;
  transition: border 0.25s, box-shadow 0.25s;
}
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(43,90,140,0.12);
}
.result-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: linear-gradient(180deg, #FBFDFF, #F2F6FB);
}
.match-badge {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.result-overview {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  margin-bottom: 16px;
}
.result-intro {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 16px;
}
.result-hints {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}
.result-hints li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--text-body);
}
.result-hints li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}
.panel-col .panel-card .btn {
  width: 100%;
  margin-top: 4px;
}
@media (max-width: 640px) {
  .panel-card {
    padding: 20px;
  }
}

/* ===== Feature Cards ===== */
.feature-cards-section {
  background: #F2F6FB;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100%;
  transition: box-shadow 0.3s, transform 0.3s;
}
.feature-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.feature-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}
.feature-card.feature-large img {
  height: 260px;
}
.feature-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-badge {
  display: inline-flex;
  align-self: flex-start;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-tag);
  margin-bottom: 12px;
}
.feature-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
}
.feature-body p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 16px;
}
.card-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
  transition: color 0.2s;
}
.card-more::after {
  content: "→";
  transition: transform 0.3s;
}
.card-more:hover {
  color: var(--primary-dark);
}
.card-more:hover::after {
  transform: translateX(4px);
}
@media (max-width: 640px) {
  .feature-card img,
  .feature-card.feature-large img {
    height: 180px;
  }
  .feature-body {
    padding: 20px;
  }
}

/* ===== FAQ ===== */
.faq-section {
  background: #fff;
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.faq-item.open {
  box-shadow: var(--shadow-2);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 22px;
  background: #fff;
  border: 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  line-height: 1.5;
  transition: color 0.25s;
}
.faq-q:hover {
  color: var(--primary);
}
.faq-q::after {
  content: "+";
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  transition: transform 0.3s, background 0.3s, color 0.3s;
}
.faq-item.open .faq-q::after {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-a p {
  padding: 0 22px 20px;
  color: var(--text-body);
  font-size: 14px;
  line-height: 1.8;
}
.faq-item.open .faq-a {
  max-height: 320px;
}
@media (max-width: 640px) {
  .faq-q {
    font-size: 15px;
    padding: 16px 16px;
  }
  .faq-a p {
    padding: 0 16px 18px;
  }
}

/* ===== CTA ===== */
.cta-section {
  padding: 32px 0 88px;
  background: #fff;
}
.cta-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 16px;
  padding: 56px 48px;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: 0 16px 40px rgba(31,66,102,0.2);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
}
.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}
.cta-card p {
  font-size: 15px;
  color: rgba(255,255,255,0.82);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 28px;
}
.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}
@media (max-width: 640px) {
  .cta-section {
    padding: 24px 0 56px;
  }
  .cta-card {
    padding: 36px 20px;
  }
  .cta-card h2 {
    font-size: 24px;
  }
  .cta-actions .btn {
    width: 100%;
  }
}

/* ===== Footer ===== */
.site-footer {
  background: #EDF3F8;
  border-top: 1px solid var(--border);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 16px 0 0;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-body);
  line-height: 2.2;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--primary);
}
.footer-col p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 2;
  margin: 0;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}
@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;
  }
  .footer-bottom {
    flex-direction: column;
  }
}

/* roulang page: category4 */
:root {
  --primary: #2B5A8C;
  --primary-dark: #1F4266;
  --primary-light: #E8F0F8;
  --accent: #F07C5A;
  --accent-dark: #D9653F;
  --bg: #F7FAFD;
  --card-bg: #FFFFFF;
  --text-main: #132A3B;
  --text-body: #3E5265;
  --text-muted: #7A8B9C;
  --border: #E3EBF3;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 20px;
  --shadow-card: 0 1px 3px rgba(19,42,59,0.06), 0 4px 12px rgba(19,42,59,0.04);
  --shadow-hover: 0 8px 24px rgba(19,42,59,0.08);
  --shadow-nav: 0 2px 8px rgba(19,42,59,0.04);
  --space-section: 80px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }
button, input, textarea { font-family: inherit; outline: none; }
ul, ol { list-style: none; }

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

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all 0.2s ease; line-height: 1.4;
}
.btn:focus-visible { outline: 3px solid rgba(43,90,140,0.3); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 16px rgba(240,124,90,0.25); }
.btn-primary:active { transform: translateY(1px); box-shadow: none; }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); border-color: var(--primary-dark); }
.btn-light { background: #fff; color: var(--primary); border-color: transparent; }
.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 6px; }

.main-nav-wrap {
  position: sticky; top: 0; z-index: 80; background: #ffffff;
  border-bottom: 1px solid var(--border); box-shadow: var(--shadow-nav);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 72px; gap: 16px;
}
.logo-brand {
  display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700;
  color: var(--text-main); white-space: nowrap;
}
.logo-icon {
  width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-flex; align-items: center; justify-content: center; gap: 3px; box-shadow: 0 2px 6px rgba(43,90,140,0.22);
}
.logo-icon .dot1, .logo-icon .dot2 { width: 7px; height: 7px; border-radius: 50%; background: #fff; display: inline-block; }
.logo-icon .dot2 { background: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-link {
  display: inline-flex; align-items: center; height: 72px; padding: 0 14px;
  color: var(--text-muted); font-size: 15px; font-weight: 500;
  border-bottom: 2px solid transparent; transition: color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); border-bottom-color: var(--primary); }
.nav-link.active { color: var(--primary); border-bottom-color: var(--primary); }
.nav-search {
  display: flex; align-items: center; background: #F2F6FB; border: 1px solid transparent;
  border-radius: var(--radius-pill); padding: 0 14px; height: 38px; width: 180px; transition: all 0.2s ease;
}
.nav-search:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(43,90,140,0.12); }
.nav-search i { color: var(--text-muted); font-size: 13px; margin-right: 8px; }
.nav-search input { border: none; background: transparent; font-size: 14px; color: var(--text-main); width: 100%; }
.nav-search input::placeholder { color: var(--text-muted); }
.nav-cta { white-space: nowrap; }
.nav-toggle { display: none; background: transparent; border: 1px solid var(--border); border-radius: var(--radius-sm); width: 40px; height: 40px; align-items: center; justify-content: center; font-size: 16px; color: var(--primary); cursor: pointer; }

.cat-hero {
  position: relative; background: linear-gradient(135deg, #EDF3F8 0%, #E8F0F8 100%);
  padding: 72px 0 56px; border-bottom: 1px solid var(--border); overflow: hidden;
}
.cat-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(43,90,140,0.1) 1px, transparent 1px);
  background-size: 22px 22px; opacity: 0.35; pointer-events: none;
}
.cat-hero-content { position: relative; z-index: 2; max-width: 780px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); margin-bottom: 16px; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { color: var(--primary-dark); }
.cat-hero-tag {
  display: inline-block; background: rgba(240,124,90,0.14); color: var(--accent-dark);
  font-size: 13px; font-weight: 600; padding: 5px 14px; border-radius: var(--radius-pill); margin-bottom: 14px;
}
.cat-hero h1 { font-size: 38px; line-height: 1.3; font-weight: 700; color: var(--text-main); margin-bottom: 14px; }
.cat-hero p { font-size: 16px; color: var(--text-body); max-width: 640px; margin-bottom: 26px; }
.cat-hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 40px; }
.section-eyebrow {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: var(--radius-pill); margin-bottom: 12px;
}
.section-head h2 { font-size: 30px; font-weight: 700; color: var(--text-main); line-height: 1.4; margin-bottom: 10px; }
.section-head p { font-size: 15px; color: var(--text-muted); margin-bottom: 0; }

.fig-section { padding: var(--space-section) 0; }
.fig-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 20px; }
.fig-item {
  position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-card);
  min-height: 270px; transition: box-shadow 0.3s ease, transform 0.3s ease; background: var(--card-bg);
}
.fig-item:nth-child(1) { grid-column: span 7; }
.fig-item:nth-child(2) { grid-column: span 5; }
.fig-item:nth-child(3) { grid-column: span 5; }
.fig-item:nth-child(4) { grid-column: span 7; }
.fig-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; min-height: 270px; }
.fig-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.fig-item:hover img { transform: scale(1.04); }
.fig-caption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 48px 20px 16px;
  background: linear-gradient(to top, rgba(19,42,59,0.78), transparent); color: #fff;
}
.fig-caption h3 { font-size: 18px; font-weight: 600; margin-bottom: 2px; }
.fig-caption p { font-size: 13px; color: rgba(255,255,255,0.9); margin: 0; }

.steps-section { padding: var(--space-section) 0; background: #F2F6FB; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-item {
  position: relative; background: #fff; border-radius: var(--radius); padding: 34px 24px 28px;
  box-shadow: var(--shadow-card); border-top: 3px solid var(--primary); transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.step-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.step-num {
  position: absolute; top: 10px; right: 16px; font-size: 42px; font-weight: 700;
  color: rgba(43,90,140,0.08); line-height: 1; pointer-events: none;
}
.step-icon {
  width: 46px; height: 46px; border-radius: 12px; background: var(--primary-light);
  color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 18px; margin-bottom: 16px;
}
.step-item h3 { font-size: 17px; font-weight: 600; color: var(--text-main); margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-muted); margin: 0; line-height: 1.65; }

.faq-section { padding: var(--space-section) 0; }
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-card);
  margin-bottom: 12px; overflow: hidden; border-left: 4px solid var(--primary); transition: box-shadow 0.3s ease;
}
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 18px 20px; background: transparent; border: none; font-size: 15px; font-weight: 600;
  color: var(--text-main); cursor: pointer; text-align: left; transition: background 0.2s ease; line-height: 1.5;
}
.faq-question:hover { background: var(--primary-light); }
.faq-question i { color: var(--primary); transition: transform 0.3s ease; font-size: 14px; flex-shrink: 0; }
.faq-item.active .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; padding: 0 20px; }
.faq-item.active .faq-answer { max-height: 400px; padding-bottom: 18px; }
.faq-answer p { font-size: 14px; color: var(--text-body); line-height: 1.7; }

.cta-section { padding: 0 0 80px; }
.cta-card {
  position: relative; background: var(--primary); border-radius: 20px; padding: 56px 48px;
  text-align: center; color: #fff; overflow: hidden; box-shadow: 0 12px 32px rgba(43,90,140,0.18);
}
.cta-card::before {
  content: "彩神vll"; position: absolute; right: -20px; bottom: -60px; font-size: 150px; font-weight: 700;
  color: rgba(255,255,255,0.04); line-height: 1; pointer-events: none;
}
.cta-card h2 { color: #fff; font-size: 28px; font-weight: 700; margin-bottom: 12px; position: relative; z-index: 2; }
.cta-card p { color: rgba(255,255,255,0.86); font-size: 15px; max-width: 560px; margin: 0 auto 26px; position: relative; z-index: 2; }
.cta-card .btn { position: relative; z-index: 2; }

.site-footer { background: #EDF3F8; border-top: 1px solid var(--border); padding: 56px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.footer-logo { display: inline-flex; align-items: center; gap: 8px; font-size: 22px; font-weight: 700; color: var(--text-main); }
.footer-brand p { color: var(--text-muted); font-size: 14px; margin: 14px 0 0; max-width: 280px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: var(--text-main); margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-muted); font-size: 14px; padding: 5px 0; transition: color 0.2s ease; }
.footer-col a:hover { color: var(--primary); }
.footer-col p { color: var(--text-muted); font-size: 14px; margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid var(--border); padding: 18px 0; display: flex; justify-content: space-between;
  font-size: 13px; color: var(--text-muted); flex-wrap: wrap; gap: 8px;
}

@media (min-width: 641px) and (max-width: 1024px) {
  .nav-search { width: 140px; }
  .nav-link { padding: 0 10px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .fig-item:nth-child(n) { grid-column: span 6; min-height: 240px; }
  .fig-item img { min-height: 240px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cat-hero h1 { font-size: 32px; }
}

@media (max-width: 640px) {
  .nav-inner { height: 64px; }
  .nav-toggle { display: inline-flex; }
  .nav-search { display: none; }
  .nav-cta { padding: 8px 14px; font-size: 13px; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff;
    flex-direction: column; align-items: stretch; padding: 8px 24px 16px;
    box-shadow: 0 12px 24px rgba(19,42,59,0.08); border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-link { height: 46px; border-bottom: none; border-radius: 6px; }
  .nav-link:hover { background: var(--primary-light); border-bottom: none; }
  .nav-link.active { background: var(--primary-light); border-bottom: none; }

  .cat-hero { padding: 48px 0 40px; }
  .cat-hero h1 { font-size: 28px; }
  .cat-hero p { font-size: 15px; }
  .cat-hero-actions { flex-direction: column; }
  .cat-hero-actions .btn { width: 100%; }

  .section-head h2 { font-size: 24px; }
  .fig-grid { grid-template-columns: 1fr; }
  .fig-item:nth-child(n) { grid-column: span 1; min-height: 200px; }
  .fig-item img { min-height: 200px; }
  .fig-caption { padding-top: 32px; }

  .steps-grid { grid-template-columns: 1fr; }
  .step-item { padding: 28px 20px 24px; }

  .faq-question { font-size: 14px; padding: 16px 16px; }
  .faq-answer { padding: 0 16px; }
  .faq-item.active .faq-answer { padding-bottom: 14px; }

  .cta-card { padding: 40px 24px; }
  .cta-card h2 { font-size: 22px; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}