/* roulang page: index */
:root {
  --primary: #4F2ED4;
  --primary-light: #6B4DE0;
  --accent: #FFC62B;
  --dark: #0F1222;
  --light: #F6F7FB;
  --text: #1A1D29;
  --text-sub: #6B7280;
  --white: #FFFFFF;
  --border: rgba(15,18,34,.08);
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 8px rgba(15,18,34,.06);
  --shadow-hover: 0 12px 32px rgba(79,46,212,.14);
  --container: 1200px;
  --space-section: 96px;
  --font-main: "Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-main);font-size:16px;line-height:1.7;color:var(--text);background:var(--white);-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px;flex-wrap:wrap}
.section-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--primary);background:rgba(79,46,212,.08);padding:6px 14px;border-radius:999px;margin-bottom:12px}
.section-title{font-size:clamp(22px,3vw,34px);line-height:1.3;font-weight:800;color:var(--text)}
.section-desc{margin-top:12px;font-size:15px;color:var(--text-sub);max-width:560px}
.section-link{font-size:14px;font-weight:600;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap .3s}
.section-link:hover{gap:10px}
.reveal{opacity:0;transform:translateY(20px);transition:opacity .5s ease,transform .5s ease}
.reveal.in-view{opacity:1;transform:none}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 28px;border-radius:10px;font-weight:700;font-size:15px;border:none;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s;white-space:nowrap}
.btn:focus-visible{outline:3px solid rgba(79,46,212,.4);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.7);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn-ghost:active{transform:translateY(0)}
.btn-dark{background:var(--dark);color:#fff}
.btn-dark:hover{background:#1F2437;transform:translateY(-2px)}

.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(15,18,34,.55);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);transition:background .3s,box-shadow .3s}
.site-header.scrolled{background:rgba(15,18,34,.92);box-shadow:0 6px 24px rgba(0,0,0,.2)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:17px;letter-spacing:.01em}
.logo-icon{width:38px;height:38px;border-radius:10px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:20px;flex-shrink:0;box-shadow:0 4px 14px rgba(79,46,212,.35)}
.logo-text span{color:var(--accent)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:rgba(255,255,255,.8);font-size:15px;font-weight:500;padding:10px 16px;border-radius:8px;transition:background .25s,color .25s;position:relative}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav a.active{color:#fff;font-weight:700}
.main-nav a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:var(--accent);border-radius:2px}
.nav-toggle{display:none;width:42px;height:42px;border:none;background:transparent;color:#fff;cursor:pointer;align-items:center;justify-content:center;border-radius:8px}
.nav-toggle:hover{background:rgba(255,255,255,.08)}
.nav-toggle svg{width:24px;height:24px}

.hero{position:relative;min-height:80vh;display:flex;align-items:center;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;padding-top:68px}
.hero::before{content:"";position:absolute;inset:0;background:linear-gradient(115deg,rgba(15,18,34,.92) 30%,rgba(79,46,212,.55) 100%);z-index:1}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:48px 48px;z-index:1;pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:760px;padding:80px 0}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,198,43,.14);color:var(--accent);border:1px solid rgba(255,198,43,.3);padding:8px 16px;border-radius:999px;font-size:13px;font-weight:700;letter-spacing:.04em}
.hero h1{font-size:clamp(28px,4vw,48px);line-height:1.2;font-weight:800;color:#fff;margin:24px 0 16px}
.hero-sub{font-size:16px;line-height:1.7;color:rgba(255,255,255,.7);max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-trust{display:flex;gap:24px;margin-top:40px;flex-wrap:wrap}
.hero-trust span{display:flex;align-items:center;gap:8px;color:rgba(255,255,255,.6);font-size:13px}
.hero-trust svg{width:16px;height:16px;color:var(--accent)}

.services-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px;align-items:start}
.services-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s,border-color .3s}
.services-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(79,46,212,.5)}
.services-card:first-child{grid-row:span 2;padding:40px;display:flex;flex-direction:column;justify-content:center;background:var(--dark);color:#fff;border-color:transparent;min-height:320px}
.services-card:first-child .service-icon{background:rgba(255,255,255,.1);color:var(--accent)}
.services-card:first-child .service-title{color:#fff}
.services-card:first-child .service-desc{color:rgba(255,255,255,.7)}
.services-card:last-child{grid-column:1/3;min-height:140px;display:flex;align-items:center;gap:32px;background:linear-gradient(100deg,var(--primary),var(--primary-light));border-color:transparent;color:#fff}
.services-card:last-child .service-icon{background:rgba(255,255,255,.16);color:#fff}
.services-card:last-child .service-title{color:#fff}
.services-card:last-child .service-desc{color:rgba(255,255,255,.78)}
.service-icon{width:52px;height:52px;border-radius:12px;background:rgba(79,46,212,.1);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:20px;flex-shrink:0}
.service-icon svg{width:26px;height:26px}
.service-title{font-size:18px;font-weight:800;color:var(--text);margin-bottom:8px}
.service-desc{font-size:14px;color:var(--text-sub);line-height:1.6}
.services-card:last-child .service-desc{font-size:15px}

.stats-section{background:var(--light);border-top:1px solid rgba(15,18,34,.06);border-bottom:1px solid rgba(15,18,34,.06)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px 28px;text-align:center;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.stat-number{font-size:clamp(40px,4vw,56px);font-weight:800;color:var(--primary);line-height:1.1;letter-spacing:-.02em}
.stat-label{margin-top:12px;font-size:14px;color:var(--text-sub)}

.cases-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.case-card{display:grid;grid-template-columns:1fr 1fr;background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s,border-color .3s}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(79,46,212,.5)}
.case-image{overflow:hidden;position:relative}
.case-image img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.case-card:hover .case-image img{transform:scale(1.03)}
.case-body{padding:28px;display:flex;flex-direction:column;justify-content:center}
.case-tag{display:inline-block;font-size:12px;font-weight:700;color:var(--primary);background:rgba(79,46,212,.08);padding:4px 10px;border-radius:var(--radius-sm);margin-bottom:14px;width:max-content}
.case-title{font-size:19px;font-weight:800;line-height:1.4;margin-bottom:10px}
.case-desc{font-size:14px;color:var(--text-sub);line-height:1.6}
.case-wide{grid-column:1/3;display:grid;grid-template-columns:1fr 2fr;background:var(--dark);border-color:transparent;color:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.case-wide .case-image{min-height:200px}
.case-wide .case-body{background:linear-gradient(100deg,var(--dark) 20%,rgba(79,46,212,.4))}
.case-wide .case-tag{background:rgba(255,198,43,.15);color:var(--accent)}
.case-wide .case-title{color:#fff}
.case-wide .case-desc{color:rgba(255,255,255,.7)}

.solution-wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.solution-image{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-hover);position:relative}
.solution-image img{width:100%;height:100%;object-fit:cover}
.solution-body .section-kicker{margin-top:0}
.solution-list{margin-top:24px;display:flex;flex-direction:column;gap:14px}
.solution-list li{display:flex;gap:12px;font-size:15px;color:var(--text);align-items:flex-start}
.solution-list li svg{width:20px;height:20px;color:var(--primary);flex-shrink:0;margin-top:2px}
.solution-link-more{display:inline-flex;align-items:center;gap:6px;margin-top:28px;font-size:15px;font-weight:700;color:var(--primary);transition:gap .3s}
.solution-link-more:hover{gap:10px}

.news-section{background:var(--light)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s,border-color .3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(79,46,212,.5)}
.news-meta{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.news-badge{font-size:12px;font-weight:700;color:var(--accent);background:rgba(79,46,212,.12);padding:4px 10px;border-radius:var(--radius-sm);white-space:nowrap}
.news-date{font-size:13px;color:var(--text-sub)}
.news-card h3{font-size:17px;font-weight:800;line-height:1.45;margin-bottom:10px;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{font-size:14px;color:var(--text-sub);line-height:1.65;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px}
.news-link{font-size:14px;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px;transition:gap .3s}
.news-link:hover{gap:10px}
.news-empty{grid-column:1/4;text-align:center;padding:60px 24px;background:#fff;border-radius:var(--radius-lg);border:1px dashed rgba(15,18,34,.18);color:var(--text-sub);font-size:15px}

.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:border-color .3s,box-shadow .3s}
.faq-item.active{border-color:rgba(79,46,212,.4);box-shadow:var(--shadow)}
.faq-item.active .faq-question{color:var(--primary)}
.faq-question{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;background:none;border:none;padding:0 24px;min-height:56px;font-size:15px;font-weight:700;color:var(--text);cursor:pointer;text-align:left;transition:color .3s;line-height:1.4}
.faq-question:hover{color:var(--primary)}
.faq-icon{position:relative;width:20px;height:20px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:currentColor;border-radius:2px;transition:transform .3s}
.faq-icon::before{width:14px;height:2px;top:9px;left:3px}
.faq-icon::after{width:2px;height:14px;top:3px;left:9px}
.faq-item.active .faq-icon::after{transform:rotate(90deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-answer-inner{padding:0 24px 16px;font-size:14px;color:var(--text-sub);line-height:1.75;border-top:1px solid rgba(15,18,34,.06);padding-top:16px}
.faq-item.active .faq-answer{max-height:400px}

.cta-section{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.cta-section::before{content:"";position:absolute;top:-60px;right:-60px;width:260px;height:260px;border-radius:50%;background:rgba(79,46,212,.35);filter:blur(30px)}
.cta-section::after{content:"";position:absolute;bottom:-80px;left:10%;width:220px;height:220px;border-radius:50%;background:rgba(255,198,43,.12);filter:blur(40px)}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;position:relative;z-index:2}
.cta-title{font-size:clamp(22px,3vw,32px);font-weight:800;line-height:1.3;margin-bottom:16px}
.cta-desc{color:rgba(255,255,255,.7);font-size:15px;margin-bottom:32px;max-width:440px}
.cta-actions{display:flex;gap:16px;flex-wrap:wrap}
.contact-card{background:#fff;border-radius:var(--radius-lg);padding:32px;color:var(--text);box-shadow:0 24px 60px rgba(0,0,0,.3)}
.contact-card h3{font-size:20px;font-weight:800;margin-bottom:6px}
.contact-card .form-note{font-size:13px;color:var(--text-sub);margin-bottom:24px}
.form-group{display:flex;flex-direction:column;gap:6px;margin-bottom:20px}
.form-group label{font-size:14px;font-weight:600;color:var(--text)}
.form-group label .req{color:var(--error);margin-left:2px}
.form-input{height:46px;border:1px solid var(--border);border-radius:10px;padding:0 14px;font-size:15px;background:#fff;transition:border-color .2s,box-shadow .2s;width:100%}
textarea.form-input{height:auto;min-height:90px;padding:12px 14px;resize:vertical;line-height:1.6}
.form-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,46,212,.15)}
.form-input.is-error{border-color:var(--error);box-shadow:0 0 0 3px rgba(239,68,68,.1)}
.form-input.is-success{border-color:var(--success);box-shadow:0 0 0 3px rgba(34,197,94,.1)}
.form-feedback{font-size:13px;margin-top:4px;display:flex;align-items:center;gap:4px;min-height:18px}
.form-feedback.error{color:var(--error)}
.form-feedback.success{color:var(--success)}
.form-submit{width:100%;margin-top:8px}
.form-success-msg{display:none;margin-top:12px;padding:12px 16px;background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.3);color:var(--success);font-size:14px;border-radius:10px;text-align:center;font-weight:600}
.form-success-msg.show{display:block}

.site-footer{background:var(--dark);color:rgba(255,255,255,.7)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding:64px 0 40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.7;max-width:320px}
.footer-col h4{color:#fff;font-size:15px;font-weight:800;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.65);transition:color .25s}
.footer-col ul a:hover{color:var(--accent)}
.footer-contact li{font-size:14px;display:flex;gap:8px;color:rgba(255,255,255,.65);align-items:flex-start}
.footer-contact li svg{width:16px;height:16px;color:var(--accent);margin-top:3px;flex-shrink:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:24px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.5)}
.footer-bottom a{color:rgba(255,255,255,.7);transition:color .25s}
.footer-bottom a:hover{color:var(--accent)}

@media (max-width:1023px){
  :root{--space-section:72px}
  .container{padding:0 20px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .cases-grid{grid-template-columns:1fr}
  .case-wide{grid-column:auto}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .news-empty{grid-column:1/3}
  .cta-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  :root{--space-section:56px}
  .container{padding:0 16px}
  .section-head{margin-bottom:32px}
  .main-nav{display:none;position:fixed;top:68px;left:0;right:0;bottom:0;background:rgba(15,18,34,.98);flex-direction:column;padding:24px 16px;gap:4px;align-items:stretch;backdrop-filter:blur(20px);z-index:99}
  .main-nav.open{display:flex}
  .main-nav a{font-size:17px;padding:16px 20px;border-radius:10px}
  .main-nav a.active{background:rgba(79,46,212,.25)}
  .main-nav a.active::after{display:none}
  .nav-toggle{display:flex}
  .hero{min-height:60vh}
  .hero-content{padding:56px 0}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .services-grid{grid-template-columns:1fr}
  .services-card:first-child{grid-row:auto;min-height:0;padding:32px}
  .services-card:last-child{grid-column:auto;flex-direction:column;align-items:flex-start;gap:14px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat-card{padding:24px 16px}
  .case-card{grid-template-columns:1fr}
  .case-image{min-height:180px}
  .case-wide{grid-template-columns:1fr}
  .case-wide .case-image{min-height:180px}
  .solution-wrap{grid-template-columns:1fr;gap:32px}
  .solution-image{min-height:220px}
  .news-grid{grid-template-columns:1fr}
  .news-empty{grid-column:auto}
  .cta-actions{flex-direction:column;width:100%}
  .cta-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr}
  .contact-card{padding:24px}
}

/* roulang page: category1 */
:root {
  --primary: #4F2ED4;
  --primary-dark: #3A1FA6;
  --primary-light: #EDEAFC;
  --primary-soft: #F2EFFF;
  --accent: #FFC62B;
  --accent-soft: #FFF7DE;
  --bg-light: #F6F7FB;
  --bg-dark: #0F1222;
  --text-main: #1A1D29;
  --text-secondary: #6B7280;
  --text-white: #FFFFFF;
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;
  --border: 1px solid rgba(15,18,34,.08);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 8px rgba(15,18,34,.06);
  --shadow-hover: 0 12px 32px rgba(79,46,212,.14);
  --header-h: 72px;
  --space-section: 96px;
  --transition: .3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea { font-family: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.bg-light { background: var(--bg-light); }

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 20px rgba(79,46,212,.28);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(79,46,212,.35);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(79,46,212,.25); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid rgba(79,46,212,.4);
}
.btn-outline:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,46,212,.12);
}
.btn-outline:active { transform: translateY(0); }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(15,18,34,.06);
  transition: background var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,.98);
  box-shadow: 0 4px 24px rgba(15,18,34,.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-main);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: .2px;
  transition: opacity var(--transition);
}
.logo:hover { opacity: .85; }
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(79,46,212,.3);
}
.logo-icon svg { width: 20px; height: 20px; }
.logo-text { line-height: 1.2; }
.logo-text span { color: var(--primary); }
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.main-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition), background var(--transition);
}
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav a.active {
  color: var(--primary);
  font-weight: 600;
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  transition: background var(--transition);
}
.nav-toggle:hover { background: var(--bg-light); }
.nav-toggle svg { width: 24px; height: 24px; }

/* ===== Category Hero ===== */
.category-hero {
  background: linear-gradient(135deg, #F6F7FB 0%, #EDEAFC 100%);
  padding: 88px 0 72px;
  position: relative;
  overflow: hidden;
}
.category-hero::before {
  content: '';
  position: absolute;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(79,46,212,.1) 0%, transparent 70%);
  top: -120px;
  right: -80px;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 32px;
  padding: 0 14px;
  border-radius: 20px;
  background: var(--accent-soft);
  color: #B45309;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.hero-title {
  font-size: clamp(32px, 5vw, 46px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.hero-title .highlight { color: var(--primary); }
.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 460px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(79,46,212,.16);
  aspect-ratio: 4/3;
}
.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.hero-visual:hover img { transform: scale(1.03); }
.hero-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,18,34,.18) 0%, transparent 60%);
  pointer-events: none;
}

/* ===== Section Head ===== */
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-head h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Index Cards ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.card-item {
  background: #fff;
  border: var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(79,46,212,.35);
}
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.card-icon svg { width: 22px; height: 22px; }
.card-item h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}
.card-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}
.card-tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-light);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}
.card-item:hover .card-tag {
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.step-item {
  background: #fff;
  border-radius: var(--radius-lg);
  border: var(--border);
  padding: 32px 28px;
  position: relative;
  transition: box-shadow var(--transition), transform var(--transition);
}
.step-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.step-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  opacity: .85;
  line-height: 1;
  margin-bottom: 16px;
  font-family: "Barlow Condensed", "Inter", sans-serif;
  letter-spacing: .5px;
}
.step-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Safety Tips ===== */
.safety-section {
  background: var(--bg-dark);
  padding: var(--space-section) 0;
  position: relative;
  overflow: hidden;
}
.safety-section::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(79,46,212,.4) 0%, transparent 70%);
  top: -80px;
  left: 30%;
  pointer-events: none;
}
.safety-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
  z-index: 2;
}
.safety-item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  color: var(--text-white);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.safety-item:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,198,43,.3);
  transform: translateY(-3px);
}
.safety-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.safety-item h3 svg { width: 20px; height: 20px; color: var(--accent); flex-shrink: 0; }
.safety-item p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.7);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item:hover { border-color: rgba(79,46,212,.25); }
.faq-item.open { border-color: rgba(79,46,212,.2); box-shadow: var(--shadow); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 56px;
  padding: 0 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  transition: color var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform .3s ease;
}
.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: opacity .3s ease, transform .3s ease;
}
.faq-icon::before { width: 18px; height: 2px; top: 8px; left: 0; }
.faq-icon::after { width: 2px; height: 18px; top: 0; left: 8px; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease, padding .3s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer {
  max-height: 320px;
  padding: 0 24px 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--bg-dark);
  padding: 88px 0;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(79,46,212,.35) 0%, transparent 70%);
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.3;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 16px;
  color: rgba(255,255,255,.65);
  margin-bottom: 36px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.cta-section .btn-primary {
  background: var(--accent);
  color: #1A1D29;
  box-shadow: 0 8px 28px rgba(255,198,43,.3);
}
.cta-section .btn-primary:hover {
  background: #FDB714;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255,198,43,.4);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.7);
  padding: 72px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.site-footer .logo { color: #fff; margin-bottom: 18px; }
.site-footer .logo-text span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,.6);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.6);
}
.footer-contact svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255,255,255,.45);
  text-align: center;
}
.footer-bottom a { color: rgba(255,255,255,.6); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 18px 0 0;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-secondary); transition: color var(--transition); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--text-secondary); }
.breadcrumb .current { color: var(--text-main); font-weight: 500; }

/* ===== Viewport Animation ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .4s ease, transform .4s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  :root { --space-section: 72px; }
  .cards-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .safety-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 767px) {
  :root { --space-section: 56px; --header-h: 62px; }
  .container { padding: 0 16px; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 78%;
    max-width: 340px;
    height: 100vh;
    background: #fff;
    box-shadow: -12px 0 40px rgba(15,18,34,.12);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 84px 24px 32px;
    gap: 4px;
    transition: right .3s ease;
    z-index: 99;
  }
  .main-nav.open { right: 0; }
  .main-nav a {
    height: 48px;
    width: 100%;
    font-size: 16px;
    border-radius: 10px;
    justify-content: flex-start;
    padding: 0 16px;
  }
  .main-nav a.active { background: var(--primary-light); }
  .main-nav a.active::after { display: none; }
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,18,34,.5);
    z-index: 98;
  }
  .nav-overlay.open { display: block; }

  .category-hero { padding: 56px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-title { font-size: clamp(28px, 5vw, 34px); }
  .hero-sub { font-size: 15px; }
  .hero-actions .btn { flex: 1; justify-content: center; }
  .hero-visual { aspect-ratio: 4/3.2; }

  .cards-grid { grid-template-columns: 1fr; gap: 16px; }
  .steps-grid { grid-template-columns: 1fr; gap: 16px; }
  .safety-grid { grid-template-columns: 1fr; gap: 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section-head { margin-bottom: 36px; }
  .faq-question { font-size: 15px; padding: 0 16px; }
  .faq-answer { padding: 0 16px; }
  .faq-item.open .faq-answer { padding: 0 16px 18px; }
  .cta-section { padding: 64px 0; }
  .cta-section .btn { width: 100%; }
}

@media (max-width: 520px) {
  .footer-bottom { flex-direction: column; line-height: 1.8; }
  .btn { height: 44px; padding: 0 20px; font-size: 14px; }
}

/* roulang page: article */
:root {
  --primary: #4F2ED4;
  --primary-light: #6B4EE8;
  --accent: #FFC62B;
  --bg-light: #F6F7FB;
  --bg-dark: #0F1222;
  --text-main: #1A1D29;
  --text-sub: #6B7280;
  --text-white: #FFFFFF;
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-default: 0 2px 8px rgba(15,18,34,.06);
  --shadow-hover: 0 12px 32px rgba(79,46,212,.14);
  --border-default: 1px solid rgba(15,18,34,.08);
  --spacing-section: 96px;
  --spacing-section-md: 72px;
  --spacing-section-sm: 56px;
  --font-sans: "Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--text-main);
  background: var(--bg-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

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

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15,18,34,.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s, box-shadow .3s;
  box-shadow: 0 4px 24px rgba(0,0,0,.16);
}
.site-header.scrolled {
  background: rgba(15,18,34,.97);
  box-shadow: 0 8px 32px rgba(0,0,0,.28);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 14px rgba(79,46,212,.4);
}
.logo-icon svg { width: 20px; height: 20px; }
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: .5px;
  white-space: nowrap;
}
.logo-text span { color: var(--accent); }
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.main-nav a {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  border-radius: 8px;
  transition: color .2s, background .2s;
  position: relative;
}
.main-nav a:hover {
  color: #fff;
  background: rgba(255,255,255,.08);
}
.main-nav a.active {
  color: #fff;
  font-weight: 600;
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: background .2s;
}
.nav-toggle:hover { background: rgba(255,255,255,.08); }
.nav-toggle svg { width: 24px; height: 24px; transition: transform .3s; }
.nav-toggle.active svg { transform: rotate(180deg); }

/* ===== 面包屑 ===== */
.breadcrumb-wrap {
  background: #fff;
  border-bottom: 1px solid rgba(15,18,34,.06);
  padding: 16px 0;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
}
.breadcrumb a {
  color: var(--text-sub);
  transition: color .2s;
  display: inline-flex;
  align-items: center;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #c0c4cc; }
.breadcrumb .current {
  color: var(--text-main);
  font-weight: 500;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 文章页主布局 ===== */
.article-page {
  background: var(--bg-light);
  padding: var(--spacing-section-sm) 0 0;
}
.article-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 文章头部 */
.article-header {
  text-align: center;
  margin-bottom: 40px;
  padding-top: 16px;
}
.article-category {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(79,46,212,.1);
  color: var(--primary);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  transition: background .2s, color .2s;
}
.article-category:hover {
  background: var(--primary);
  color: #fff;
}
.article-header h1 {
  font-size: clamp(26px, 4vw, 38px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--text-main);
  max-width: 780px;
  margin: 0 auto 20px;
  letter-spacing: .5px;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  color: var(--text-sub);
  font-size: 14px;
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta svg { width: 16px; height: 16px; opacity: .7; }

/* 正文区 */
.article-content {
  max-width: 720px;
  margin: 0 auto;
  background: #fff;
  padding: 48px 56px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-default);
  font-size: 16px;
  line-height: 1.8;
  color: #2D2D33;
  border: 1px solid rgba(15,18,34,.04);
}
.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 32px;
  margin-bottom: 16px;
  line-height: 1.3;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 24px;
  margin-bottom: 12px;
  line-height: 1.4;
}
.article-content p {
  margin-bottom: 16px;
  font-size: 16px;
  line-height: 1.8;
  color: #2D2D33;
}
.article-content img {
  max-width: 100%;
  border-radius: 8px;
  margin: 24px 0;
  box-shadow: var(--shadow-default);
}
.article-content blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  background: var(--bg-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 10px 10px 0;
  font-style: italic;
  color: #444;
}
.article-content blockquote p {
  margin-bottom: 0;
}
.article-content ul,
.article-content ol {
  margin: 16px 0 16px 24px;
  line-height: 1.8;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content code {
  background: #f0f1f5;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
  font-family: "Barlow Condensed", "SFMono-Regular", Consolas, monospace;
}
.article-content pre {
  background: var(--bg-dark);
  color: #e5e7eb;
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 20px 0;
  line-height: 1.6;
  font-size: 14px;
}
.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}
.article-content a {
  color: var(--primary);
  border-bottom: 1px solid rgba(79,46,212,.3);
  transition: border-color .2s, color .2s;
}
.article-content a:hover {
  color: var(--primary-light);
  border-color: var(--primary);
}
.article-content hr {
  border: none;
  border-top: 1px solid rgba(15,18,34,.08);
  margin: 32px 0;
}

/* 上一篇 / 下一篇 */
.article-direction {
  max-width: 720px;
  margin: 32px auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.direction-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 24px;
  background: #fff;
  border-radius: var(--radius-md);
  border: var(--border-default);
  transition: transform .25s, box-shadow .25s, border-color .25s;
  min-height: 88px;
  justify-content: center;
}
.direction-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(79,46,212,.5);
}
.direction-card.disabled {
  opacity: .55;
  cursor: default;
  transform: none !important;
  box-shadow: none !important;
}
.direction-label {
  font-size: 13px;
  color: var(--text-sub);
  font-weight: 500;
}
.direction-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.direction-card.next { text-align: right; }
.direction-card.next .direction-title { text-align: right; }

/* 相关推荐 */
.related-section {
  max-width: 960px;
  margin: 48px auto 0;
  padding: 0 24px 32px;
}
.related-section-head h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
  position: relative;
  padding-left: 16px;
}
.related-section-head h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 22px;
  border-radius: 4px;
  background: var(--primary);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: #fff;
  border-radius: var(--radius-md);
  border: var(--border-default);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(79,46,212,.4);
}
.related-thumb {
  width: 72px;
  height: 72px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: #f0f0f4;
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.related-card:hover .related-thumb img { transform: scale(1.06); }
.related-info {
  min-width: 0;
  flex: 1;
}
.related-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-date {
  font-size: 13px;
  color: var(--text-sub);
}
.related-placeholder {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(15,18,34,.12);
  color: var(--text-sub);
  font-size: 15px;
}

/* 返回入口 */
.back-link {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 56px;
  text-align: center;
}
.back-link a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  transition: color .2s, gap .2s;
}
.back-link a:hover {
  color: var(--primary);
  gap: 12px;
}
.back-link svg { width: 16px; height: 16px; }

/* ===== 无文章状态 ===== */
.not-found-page {
  background: var(--bg-light);
  padding: 80px 24px;
  min-height: 55vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.not-found-box {
  text-align: center;
  background: #fff;
  padding: 48px 56px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15,18,34,.06);
  box-shadow: var(--shadow-default);
  max-width: 480px;
  width: 100%;
}
.not-found-box .icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(79,46,212,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--primary);
}
.not-found-box .icon svg { width: 28px; height: 28px; }
.not-found-box h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}
.not-found-box p {
  color: var(--text-sub);
  font-size: 15px;
  margin-bottom: 28px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: translateY(0);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.75);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .logo {
  margin-bottom: 18px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,.55);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  transition: color .2s, padding-left .2s;
}
.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.55);
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  color: rgba(255,255,255,.4);
  flex-shrink: 0;
}
.footer-bottom {
  padding: 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}
.footer-bottom a {
  color: rgba(255,255,255,.55);
  transition: color .2s;
}
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  :root {
    --spacing-section: 72px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  :root {
    --spacing-section: 56px;
  }
  .container {
    padding: 0 16px;
  }
  .header-inner {
    height: 64px;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15,18,34,.98);
    flex-direction: column;
    align-items: stretch;
    padding: 24px 16px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform .35s ease;
    z-index: 999;
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .main-nav a {
    font-size: 17px;
    padding: 16px 20px;
    border-radius: 10px;
    color: rgba(255,255,255,.85);
    border-bottom: 1px solid rgba(255,255,255,.05);
  }
  .main-nav a:hover {
    background: rgba(255,255,255,.06);
    color: #fff;
  }
  .main-nav a.active {
    background: rgba(79,46,212,.35);
  }
  .main-nav a.active::after {
    display: none;
  }
  .logo-text {
    font-size: 18px;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
  }
  .logo-icon svg { width: 18px; height: 18px; }

  .breadcrumb-wrap {
    padding: 12px 0;
  }
  .breadcrumb {
    font-size: 13px;
    gap: 6px;
  }
  .breadcrumb .current {
    max-width: 160px;
  }

  .article-container {
    padding: 0 16px;
  }
  .article-header {
    margin-bottom: 28px;
  }
  .article-header h1 {
    font-size: 24px;
    line-height: 1.35;
  }
  .article-meta {
    gap: 12px;
    font-size: 13px;
  }

  .article-content {
    padding: 28px 20px;
    font-size: 15px;
    line-height: 1.75;
    border-radius: 12px;
  }
  .article-content h2 {
    font-size: 22px;
    margin-top: 24px;
  }
  .article-content h3 {
    font-size: 18px;
    margin-top: 20px;
  }
  .article-content blockquote {
    padding: 14px 16px;
    margin: 16px 0;
  }

  .article-direction {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 0 16px;
  }
  .direction-card {
    padding: 16px 18px;
    min-height: 76px;
  }
  .direction-card.next { text-align: left; }
  .direction-card.next .direction-title { text-align: left; }

  .related-section {
    padding: 0 16px 24px;
    margin-top: 36px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .related-card {
    padding: 14px;
  }

  .back-link {
    padding: 0 16px 40px;
  }

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

@media (max-width: 520px) {
  .article-meta {
    flex-direction: column;
    gap: 6px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .not-found-box {
    padding: 32px 24px;
  }
}

/* roulang page: category2 */
:root {
  --primary: #4F2ED4;
  --primary-dark: #3F23B0;
  --accent: #FFC62B;
  --bg-light: #F6F7FB;
  --bg-dark: #0F1222;
  --text-main: #1A1D29;
  --text-sub: #6B7280;
  --text-white: #FFFFFF;
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-default: 0 2px 8px rgba(15,18,34,.06);
  --shadow-hover: 0 12px 32px rgba(79,46,212,.14);
  --border-color: rgba(15,18,34,.08);
  --border-hover: rgba(79,46,212,.6);
  --container: 1200px;
  --space-section: 96px;
  --font-family: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: #FFFFFF;
  -webkit-font-smoothing: antialiased;
}

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

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

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

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

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

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15,18,34,.72);
  transition: background .3s ease, box-shadow .3s ease;
}

.site-header.scrolled {
  background: rgba(15,18,34,.94);
  box-shadow: 0 4px 24px rgba(15,18,34,.25);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--text-white);
  letter-spacing: .2px;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 9px;
  color: var(--bg-dark);
}

.logo-icon svg {
  width: 20px;
  height: 20px;
}

.logo-text {
  color: var(--text-white);
  white-space: nowrap;
}

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

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav a {
  color: rgba(255,255,255,.72);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 2px;
  position: relative;
  transition: color .2s ease;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.main-nav a:hover {
  color: var(--text-white);
}

.main-nav a.active {
  color: var(--text-white);
}

.main-nav a.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  color: var(--text-white);
  background: rgba(255,255,255,.08);
  transition: background .2s ease;
}

.nav-toggle:hover {
  background: rgba(255,255,255,.16);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* ===== Category Hero ===== */
.category-hero {
  padding: 160px 0 72px;
  background: linear-gradient(180deg, #EDEBFA 0%, var(--bg-light) 100%);
  border-bottom: 1px solid var(--border-color);
}

.category-hero .tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(79,46,212,.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  letter-spacing: .4px;
}

.category-hero h1 {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.2;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 16px;
}

.category-hero .hero-desc {
  font-size: 17px;
  color: var(--text-sub);
  max-width: 560px;
  margin-bottom: 32px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(79,46,212,.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: var(--text-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,46,212,.36);
}

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

.btn-outline:hover {
  background: rgba(79,46,212,.08);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ===== Section ===== */
.section {
  padding: var(--space-section) 0;
}

.section-header {
  margin-bottom: 48px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.section-header h2 {
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.3;
  font-weight: 800;
  color: var(--text-main);
}

.section-header p {
  color: var(--text-sub);
  font-size: 15px;
  max-width: 480px;
}

/* ===== Overview Cards ===== */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.overview-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  box-shadow: var(--shadow-default);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.overview-card.featured {
  grid-column: span 2;
  background: linear-gradient(135deg, var(--primary) 0%, #6C4FFF 100%);
  border-color: transparent;
  color: var(--text-white);
}

.overview-card.featured h3,
.overview-card.featured p {
  color: var(--text-white);
}

.overview-card.featured .info-icon {
  background: rgba(255,255,255,.18);
  color: var(--accent);
}

.overview-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.overview-card.featured:hover {
  box-shadow: 0 12px 32px rgba(79,46,212,.3);
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(79,46,212,.1);
  color: var(--primary);
  margin-bottom: 16px;
}

.info-icon svg {
  width: 24px;
  height: 24px;
}

.overview-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.overview-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ===== Topic Cards ===== */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.topic-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px 20px;
  box-shadow: var(--shadow-default);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-hover);
}

.topic-card .topic-no {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(255,198,43,.16);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  display: inline-block;
  margin-bottom: 14px;
}

.topic-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.topic-card p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
}

.topic-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(79,46,212,.08);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
}

/* ===== Guide Section ===== */
.guide-section {
  background: var(--bg-light);
}

.guide-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.guide-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.guide-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  transition: transform .4s ease;
}

.guide-image:hover img {
  transform: scale(1.03);
}

.guide-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.guide-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(79,46,212,.22);
}

.guide-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.guide-step p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ===== Recommend ===== */
.reco-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.reco-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 220px;
  box-shadow: var(--shadow-default);
  transition: transform .25s ease, box-shadow .25s ease;
}

.reco-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.reco-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.reco-card:hover img {
  transform: scale(1.03);
}

.reco-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15,18,34,0) 30%, rgba(15,18,34,.82) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
}

.reco-overlay .reco-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--bg-dark);
  background: var(--accent);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  align-self: flex-start;
  margin-bottom: 10px;
}

.reco-overlay h3 {
  color: var(--text-white);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.reco-overlay p {
  color: rgba(255,255,255,.78);
  font-size: 13px;
  line-height: 1.6;
}

.reco-wide {
  grid-column: 1 / -1;
  min-height: 180px;
}

.reco-wide .reco-overlay {
  flex-direction: row;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.reco-wide .reco-overlay .reco-text {
  flex: 1;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-light);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .25s ease, box-shadow .25s ease;
}

.faq-item:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-default);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 20px;
  min-height: 56px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: color .2s ease;
}

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

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

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: transform .3s ease;
}

.faq-icon::before {
  top: 9px;
  left: 2px;
  width: 16px;
  height: 2px;
}

.faq-icon::after {
  top: 2px;
  left: 9px;
  width: 2px;
  height: 16px;
}

.faq-item.open .faq-icon::after {
  transform: rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}

.faq-answer-inner {
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 260px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: var(--bg-dark);
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  position: relative;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(15,18,34,.92) 0%, rgba(79,46,212,.72) 100%);
}

.cta-wrap {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}

.cta-content {
  flex: 1 1 400px;
}

.cta-content h2 {
  color: var(--text-white);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-content p {
  color: rgba(255,255,255,.8);
  font-size: 15px;
  max-width: 480px;
  margin-bottom: 24px;
}

.cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.cta-links a {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,198,43,.4);
  transition: border-color .2s ease, color .2s ease;
}

.cta-links a:hover {
  color: #FFD968;
  border-color: #FFD968;
}

.cta-actions {
  flex: 0 0 auto;
}

.cta-actions .btn {
  background: var(--accent);
  color: var(--bg-dark);
  font-weight: 800;
  box-shadow: 0 4px 20px rgba(255,198,43,.3);
}

.cta-actions .btn:hover {
  background: #FFD457;
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255,198,43,.4);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.7);
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
  font-size: 19px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.56);
  max-width: 320px;
}

.footer-col h4 {
  color: var(--text-white);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
}

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

.footer-col ul li a {
  color: rgba(255,255,255,.6);
  font-size: 14px;
  transition: color .2s ease;
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,.6);
}

.footer-contact svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex: 0 0 18px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 28px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.4);
}

.footer-bottom a {
  color: rgba(255,255,255,.5);
}

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

/* ===== Animations ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  opacity: 0;
  animation: fadeUp .5s ease forwards;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }

  .overview-grid {
    grid-template-columns: 1fr 1fr;
  }

  .overview-card.featured {
    grid-column: span 2;
  }

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

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

@media (max-width: 768px) {
  :root {
    --space-section: 56px;
  }

  .header-inner {
    height: 64px;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    background: var(--bg-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 32px 32px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform .3s ease;
    box-shadow: -8px 0 32px rgba(0,0,0,.3);
    overflow-y: auto;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav a {
    width: 100%;
    font-size: 16px;
    padding: 14px 0;
    color: rgba(255,255,255,.78);
    border-bottom: 1px solid rgba(255,255,255,.08);
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a.active {
    color: var(--accent);
  }

  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 1001;
  }

  .nav-toggle.open svg {
    display: none;
  }

  .nav-toggle::before,
  .nav-toggle::after {
    display: none;
  }

  .category-hero {
    padding: 130px 0 48px;
  }

  .overview-grid {
    grid-template-columns: 1fr;
  }

  .overview-card.featured {
    grid-column: span 1;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }

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

  .guide-image img {
    height: 260px;
  }

  .reco-grid {
    grid-template-columns: 1fr;
  }

  .reco-wide {
    grid-column: 1;
  }

  .cta-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

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

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .overview-card {
    padding: 22px 18px;
  }

  .topic-card {
    padding: 20px 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .cta-section {
    padding: 56px 0;
  }

  .cta-actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}