/* roulang page: index */
:root {
  --primary: #c62828;
  --primary-light: #e53935;
  --primary-dark: #b71c1c;
  --secondary: #f9a825;
  --secondary-light: #fdd835;
  --accent: #ff6f00;
  --bg-body: #faf6f0;
  --bg-section: #ffffff;
  --bg-dark: #1a1a2e;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #8888a0;
  --text-light: #f5f0eb;
  --border: #e8e0d8;
  --border-light: #f0ece6;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.16);
  --transition: all 0.28s cubic-bezier(0.22, 1, 0.36, 1);
  --font-base: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-width: 1200px;
  --header-height: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-base);background:var(--bg-body);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--primary);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--primary-dark)}
img{max-width:100%;height:auto;display:block}
button,input,textarea,select{font-family:inherit;font-size:inherit;border:none;outline:none;transition:var(--transition)}
button{cursor:pointer}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.25;font-weight:700;color:var(--text-primary)}
h1{font-size:2.8rem;letter-spacing:-0.02em}
h2{font-size:2.2rem;letter-spacing:-0.01em}
h3{font-size:1.5rem}
h4{font-size:1.2rem}
p{margin-bottom:0.8rem;color:var(--text-secondary)}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}
.section{padding:80px 0}
.section-title{text-align:center;margin-bottom:16px}
.section-subtitle{text-align:center;font-size:1.1rem;color:var(--text-muted);max-width:600px;margin:0 auto 48px}
.section-divider{width:60px;height:4px;background:linear-gradient(135deg,var(--primary),var(--secondary));border-radius:4px;margin:16px auto 8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 32px;border-radius:var(--radius-md);font-weight:600;font-size:1rem;transition:var(--transition);border:2px solid transparent}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(198,40,40,0.35);color:#fff}
.btn-secondary{background:var(--secondary);color:#1a1a2e;border-color:var(--secondary)}
.btn-secondary:hover{background:var(--secondary-light);border-color:var(--secondary-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(249,168,37,0.35)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--primary);border-color:#fff}
.btn-white:hover{background:var(--bg-body);transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,255,255,0.25)}
.badge{display:inline-block;padding:4px 14px;border-radius:50px;font-size:0.8rem;font-weight:600;background:var(--border-light);color:var(--text-secondary)}
.badge-primary{background:rgba(198,40,40,0.12);color:var(--primary)}
.badge-secondary{background:rgba(249,168,37,0.18);color:var(--accent)}
.card{background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:var(--transition);overflow:hidden;border:1px solid var(--border-light)}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.card-img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block}
.card-body{padding:20px 24px 24px}
.card-title{font-size:1.15rem;font-weight:700;margin-bottom:8px;color:var(--text-primary)}
.card-text{font-size:0.95rem;color:var(--text-secondary);line-height:1.6}
.tag{display:inline-block;padding:2px 12px;border-radius:50px;font-size:0.78rem;font-weight:500;background:var(--bg-body);color:var(--text-secondary);margin:2px 4px 2px 0;border:1px solid var(--border)}
.tag:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
/* ===== HEADER & NAV ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-light);height:var(--header-height);transition:var(--transition)}
.header.scrolled{box-shadow:0 2px 20px rgba(0,0,0,0.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:16px}
.logo{font-size:1.35rem;font-weight:800;color:var(--primary);white-space:nowrap;letter-spacing:-0.02em;display:flex;align-items:center;gap:8px}
.logo i{font-size:1.5rem;color:var(--secondary)}
.logo span{color:var(--text-primary)}
.logo:hover{color:var(--primary);opacity:0.9}
.header-search{flex:1;max-width:480px;position:relative;margin:0 12px}
.header-search input{width:100%;padding:10px 44px 10px 18px;border-radius:50px;background:var(--bg-body);border:1px solid var(--border);font-size:0.95rem;color:var(--text-primary);transition:var(--transition)}
.header-search input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(198,40,40,0.12);background:#fff}
.header-search input::placeholder{color:var(--text-muted)}
.header-search button{position:absolute;right:4px;top:50%;transform:translateY(-50%);background:var(--primary);color:#fff;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0.9rem;transition:var(--transition)}
.header-search button:hover{background:var(--primary-dark)}
.nav{display:flex;align-items:center;gap:4px}
.nav a{display:flex;align-items:center;gap:6px;padding:8px 18px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:500;color:var(--text-secondary);transition:var(--transition)}
.nav a i{font-size:0.9rem}
.nav a:hover,.nav a.active{background:rgba(198,40,40,0.08);color:var(--primary)}
.nav a.active{font-weight:700}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:6px;background:none;border:none}
.hamburger span{width:26px;height:2.5px;background:var(--text-primary);border-radius:4px;transition:var(--transition)}
@media(max-width:1024px){
  .header-search{max-width:320px}
  .nav a{padding:6px 14px;font-size:0.9rem}
}
@media(max-width:768px){
  .header-search{display:none}
  .hamburger{display:flex}
  .nav{position:fixed;top:var(--header-height);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);flex-direction:column;padding:16px 24px 24px;gap:4px;border-bottom:1px solid var(--border);transform:translateY(-110%);opacity:0;pointer-events:none;transition:var(--transition);box-shadow:var(--shadow-lg)}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav a{width:100%;padding:12px 16px;border-radius:var(--radius-sm);justify-content:flex-start}
  .mobile-search{display:block;width:100%;margin-bottom:12px}
  .mobile-search input{width:100%;padding:12px 16px;border-radius:var(--radius-md);background:var(--bg-body);border:1px solid var(--border);font-size:0.95rem}
  .mobile-search input:focus{border-color:var(--primary)}
}
@media(min-width:769px){
  .mobile-search{display:none!important}
}
/* ===== HERO ===== */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;background:var(--bg-dark);color:#fff;padding:120px 0 80px;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:0.25}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(26,26,46,0.88) 0%,rgba(26,26,46,0.72) 50%,rgba(198,40,40,0.30) 100%);z-index:1}
.hero-content{position:relative;z-index:2;max-width:820px;margin:0 auto;text-align:center;padding:0 24px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 20px;border-radius:50px;background:rgba(249,168,37,0.18);color:var(--secondary-light);font-size:0.9rem;font-weight:500;margin-bottom:24px;backdrop-filter:blur(4px)}
.hero h1{font-size:3.6rem;font-weight:800;color:#fff;margin-bottom:20px;letter-spacing:-0.03em;line-height:1.15}
.hero h1 span{background:linear-gradient(135deg,var(--secondary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.2rem;color:rgba(255,255,255,0.8);max-width:640px;margin:0 auto 36px;line-height:1.7}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-bottom:40px}
.hero-search-wrap{max-width:560px;margin:0 auto;position:relative}
.hero-search-wrap input{width:100%;padding:16px 56px 16px 24px;border-radius:60px;background:rgba(255,255,255,0.12);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,0.20);color:#fff;font-size:1.05rem;transition:var(--transition)}
.hero-search-wrap input::placeholder{color:rgba(255,255,255,0.5)}
.hero-search-wrap input:focus{border-color:var(--secondary);background:rgba(255,255,255,0.16);box-shadow:0 0 0 4px rgba(249,168,37,0.15)}
.hero-search-wrap button{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--secondary);color:var(--bg-dark);width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:var(--transition)}
.hero-search-wrap button:hover{background:var(--secondary-light);transform:translateY(-50%) scale(1.05)}
.hero-stats{display:flex;flex-wrap:wrap;justify-content:center;gap:32px 64px;margin-top:48px;padding-top:40px;border-top:1px solid rgba(255,255,255,0.10)}
.hero-stat{text-align:center}
.hero-stat-num{font-size:2rem;font-weight:800;color:var(--secondary-light)}
.hero-stat-label{font-size:0.9rem;color:rgba(255,255,255,0.6);margin-top:4px}
@media(max-width:768px){
  .hero h1{font-size:2.4rem}
  .hero p{font-size:1rem}
  .hero-actions{flex-direction:column;align-items:center}
  .hero-stats{gap:16px 40px}
  .hero-stat-num{font-size:1.6rem}
}
@media(max-width:520px){
  .hero h1{font-size:1.9rem}
  .hero{padding:100px 0 60px}
}
/* ===== INTRO ===== */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.intro-image{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.intro-image img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg)}
.intro-image::after{content:'';position:absolute;inset:0;border-radius:var(--radius-lg);border:2px solid rgba(198,40,40,0.10)}
.intro-text h2{font-size:2rem;margin-bottom:16px}
.intro-text h2 span{color:var(--primary)}
.intro-text p{font-size:1.05rem;margin-bottom:16px;color:var(--text-secondary)}
.intro-features{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:24px}
.intro-feat{display:flex;align-items:flex-start;gap:12px;padding:16px;background:var(--bg-body);border-radius:var(--radius-sm);border:1px solid var(--border-light)}
.intro-feat i{color:var(--primary);font-size:1.3rem;margin-top:2px}
.intro-feat div{font-size:0.95rem;font-weight:600;color:var(--text-primary)}
.intro-feat small{display:block;font-size:0.82rem;color:var(--text-muted);font-weight:400;margin-top:2px}
@media(max-width:768px){
  .intro-grid{grid-template-columns:1fr;gap:32px}
  .intro-features{grid-template-columns:1fr}
  .intro-text h2{font-size:1.6rem}
}
/* ===== CATEGORY CARDS ===== */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{position:relative;border-radius:var(--radius-md);overflow:hidden;background:var(--bg-card);border:1px solid var(--border-light);transition:var(--transition);cursor:pointer}
.cat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-6px)}
.cat-card-img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cat-card-overlay{position:absolute;bottom:0;left:0;right:0;padding:24px 20px 20px;background:linear-gradient(transparent,rgba(0,0,0,0.72))}
.cat-card-title{font-size:1.2rem;font-weight:700;color:#fff;margin-bottom:4px}
.cat-card-count{font-size:0.85rem;color:rgba(255,255,255,0.75)}
.cat-card-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.cat-card-tags .tag{background:rgba(255,255,255,0.15);color:rgba(255,255,255,0.9);border-color:rgba(255,255,255,0.2)}
@media(max-width:1024px){
  .cat-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .cat-grid{grid-template-columns:1fr}
}
/* ===== LATEST POSTS ===== */
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border-light);transition:var(--transition)}
.post-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.post-card-img{width:100%;aspect-ratio:16/10;object-fit:cover}
.post-card-body{padding:20px 24px 24px;flex:1;display:flex;flex-direction:column}
.post-card-meta{display:flex;align-items:center;gap:12px;font-size:0.82rem;color:var(--text-muted);margin-bottom:10px;flex-wrap:wrap}
.post-card-meta .badge{font-size:0.72rem;padding:2px 10px}
.post-card-title{font-size:1.1rem;font-weight:700;margin-bottom:8px;line-height:1.35;color:var(--text-primary)}
.post-card-title a{color:inherit}
.post-card-title a:hover{color:var(--primary)}
.post-card-text{font-size:0.9rem;color:var(--text-secondary);line-height:1.6;margin-bottom:12px;flex:1}
.post-card-footer{display:flex;justify-content:space-between;align-items:center;padding-top:12px;border-top:1px solid var(--border-light);font-size:0.85rem;color:var(--text-muted)}
.post-empty{grid-column:1/-1;text-align:center;padding:48px 24px;background:var(--bg-card);border-radius:var(--radius-md);border:1px dashed var(--border);color:var(--text-muted);font-size:1rem}
@media(max-width:768px){
  .post-grid{grid-template-columns:1fr}
}
/* ===== FEATURES / ICON ROW ===== */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{text-align:center;padding:32px 20px;background:var(--bg-card);border-radius:var(--radius-md);border:1px solid var(--border-light);transition:var(--transition)}
.feature-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.feature-icon{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:1.6rem;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-light))}
.feature-card h4{font-size:1.05rem;margin-bottom:8px}
.feature-card p{font-size:0.9rem;color:var(--text-muted);line-height:1.6}
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .features-grid{grid-template-columns:1fr}
}
/* ===== NUMBERS / STATS ===== */
.numbers-section{background:var(--bg-dark);color:#fff;position:relative;overflow:hidden}
.numbers-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover;opacity:0.08}
.numbers-section .container{position:relative;z-index:1}
.numbers-section .section-title{color:#fff}
.numbers-section .section-subtitle{color:rgba(255,255,255,0.6)}
.numbers-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.number-item{padding:24px}
.number-num{font-size:2.8rem;font-weight:800;background:linear-gradient(135deg,var(--secondary-light),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.number-label{font-size:0.95rem;color:rgba(255,255,255,0.7);margin-top:8px}
.number-desc{font-size:0.82rem;color:rgba(255,255,255,0.45);margin-top:4px}
@media(max-width:768px){
  .numbers-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .number-num{font-size:2.2rem}
}
@media(max-width:520px){
  .numbers-grid{grid-template-columns:1fr 1fr;gap:12px}
}
/* ===== RECOMMEND ===== */
.rec-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rec-card{background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--border-light);transition:var(--transition)}
.rec-card:hover{box-shadow:var(--shadow-md);transform:translateY(-4px)}
.rec-card-img{width:100%;aspect-ratio:16/11;object-fit:cover}
.rec-card-body{padding:20px 20px 22px}
.rec-card-tags{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:8px}
.rec-card-tags .tag{font-size:0.72rem;padding:2px 10px}
.rec-card-title{font-size:1rem;font-weight:700;margin-bottom:6px;line-height:1.35}
.rec-card-title a{color:var(--text-primary)}
.rec-card-title a:hover{color:var(--primary)}
.rec-card-text{font-size:0.88rem;color:var(--text-secondary);line-height:1.6;margin-bottom:10px}
.rec-card-footer{display:flex;justify-content:space-between;align-items:center;font-size:0.82rem;color:var(--text-muted);padding-top:10px;border-top:1px solid var(--border-light)}
@media(max-width:1024px){
  .rec-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .rec-grid{grid-template-columns:1fr}
}
/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--border-light);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden;background:var(--bg-card);transition:var(--transition)}
.faq-item:hover{border-color:var(--border)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:18px 24px;cursor:pointer;font-weight:600;font-size:1.02rem;color:var(--text-primary);background:none;width:100%;text-align:left;transition:var(--transition)}
.faq-question:hover{color:var(--primary)}
.faq-question i{font-size:0.9rem;color:var(--text-muted);transition:var(--transition)}
.faq-item.active .faq-question i{transform:rotate(180deg);color:var(--primary)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:var(--transition);color:var(--text-secondary);font-size:0.95rem;line-height:1.7}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 20px}
/* ===== CTA ===== */
.cta-section{background:linear-gradient(135deg,var(--primary-dark),var(--primary));color:#fff;text-align:center;padding:80px 0;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover;opacity:0.06}
.cta-section .container{position:relative;z-index:1}
.cta-section h2{font-size:2.4rem;color:#fff;margin-bottom:16px}
.cta-section p{font-size:1.1rem;color:rgba(255,255,255,0.85);margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
@media(max-width:768px){
  .cta-section h2{font-size:1.8rem}
}
/* ===== FOOTER ===== */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.7);padding:48px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-brand .logo{color:#fff;margin-bottom:12px}
.footer-brand .logo span{color:rgba(255,255,255,0.9)}
.footer-brand p{font-size:0.9rem;color:rgba(255,255,255,0.55);line-height:1.7;max-width:360px}
.footer-social{display:flex;gap:12px;margin-top:16px}
.footer-social a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,0.08);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,0.6);font-size:1rem;transition:var(--transition)}
.footer-social a:hover{background:var(--primary);color:#fff}
.footer h4{color:#fff;font-size:1rem;margin-bottom:16px;font-weight:600}
.footer-links li{margin-bottom:8px}
.footer-links a{color:rgba(255,255,255,0.55);font-size:0.9rem;transition:var(--transition)}
.footer-links a:hover{color:var(--secondary-light)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:24px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;font-size:0.85rem;color:rgba(255,255,255,0.4)}
.footer-bottom a{color:rgba(255,255,255,0.5)}
.footer-bottom a:hover{color:var(--secondary-light)}
@media(max-width:1024px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:520px){
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;gap:8px;text-align:center}
}
/* ===== BACK TO TOP ===== */
.back-top{position:fixed;bottom:32px;right:32px;width:48px;height:48px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:var(--shadow-md);z-index:999;opacity:0;visibility:hidden;transform:translateY(20px);transition:var(--transition)}
.back-top.visible{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--primary-dark);transform:translateY(-4px);box-shadow:var(--shadow-lg);color:#fff}
/* ===== RESPONSIVE HELPERS ===== */
@media(max-width:768px){
  .section{padding:56px 0}
  h1{font-size:2rem}
  h2{font-size:1.6rem}
  h3{font-size:1.2rem}
  .section-subtitle{font-size:0.95rem;margin-bottom:32px}
}
@media(max-width:520px){
  .section{padding:40px 0}
  h1{font-size:1.7rem}
  h2{font-size:1.3rem}
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f77f00;
            --accent-light: #fcbf49;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1d3557;
            --text: #212529;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #dee2e6;
            --border-light: #f1f3f5;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--secondary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.4rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media(max-width:768px) {
            .container {
                padding: 0 16px;
            }
        }
        @media(max-width:520px) {
            .container {
                padding: 0 12px;
            }
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-h);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--secondary);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo span {
            color: var(--primary);
        }
        .logo:hover {
            color: var(--secondary);
        }

        .header-search {
            display: flex;
            align-items: center;
            flex: 1;
            max-width: 480px;
            margin: 0 16px;
            background: var(--bg);
            border-radius: 50px;
            border: 2px solid var(--border);
            transition: var(--transition);
            overflow: hidden;
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.12);
            background: var(--bg-alt);
        }
        .header-search input {
            flex: 1;
            padding: 10px 20px;
            background: transparent;
            color: var(--text);
            font-size: 0.95rem;
            min-width: 0;
        }
        .header-search input::placeholder {
            color: var(--text-light);
            opacity: 0.7;
        }
        .header-search button {
            padding: 10px 18px;
            color: var(--text-light);
            font-size: 1.1rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .header-search button:hover {
            color: var(--primary);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }
        .nav a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: 50px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav a i {
            font-size: 1rem;
        }
        .nav a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .nav a.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.1);
            font-weight: 600;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
            flex-shrink: 0;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }
        .mobile-search {
            display: none;
        }

        @media(max-width:1024px) {
            .header-search {
                max-width: 320px;
                margin: 0 12px;
            }
            .nav a {
                padding: 8px 14px;
                font-size: 0.9rem;
            }
        }
        @media(max-width:768px) {
            .header-search {
                display: none;
            }
            .mobile-search {
                display: block;
                margin: 12px 16px 8px;
            }
            .mobile-search input {
                width: 100%;
                padding: 12px 20px;
                border-radius: 50px;
                border: 2px solid var(--border);
                background: var(--bg);
                font-size: 0.95rem;
                transition: var(--transition);
            }
            .mobile-search input:focus {
                border-color: var(--primary);
                box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.1);
            }
            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                bottom: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                padding: 8px 0 24px;
                gap: 2px;
                transform: translateX(100%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                overflow-y: auto;
                z-index: 999;
            }
            .nav.open {
                transform: translateX(0);
            }
            .nav a {
                padding: 14px 24px;
                font-size: 1.05rem;
                border-radius: 0;
                border-bottom: 1px solid var(--border-light);
                justify-content: flex-start;
            }
            .nav a.active {
                background: rgba(230, 57, 70, 0.06);
                border-left: 4px solid var(--primary);
            }
            .hamburger {
                display: flex;
            }
            .hamburger.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }
            .hamburger.active span:nth-child(2) {
                opacity: 0;
            }
            .hamburger.active span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
        }
        @media(max-width:520px) {
            .logo {
                font-size: 1.2rem;
            }
            .logo i {
                font-size: 1.3rem;
            }
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: var(--bg);
            clip-path: ellipse(70% 100% at 50% 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            color: var(--text-white);
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            margin-bottom: 16px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .page-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: clamp(1rem, 2vw, 1.2rem);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .page-hero .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .page-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-hero .breadcrumb a:hover {
            color: var(--accent-light);
        }
        .page-hero .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.35);
        }
        @media(max-width:768px) {
            .page-hero {
                padding: 60px 0 50px;
                min-height: 260px;
            }
            .page-hero::after {
                height: 40px;
            }
        }
        @media(max-width:520px) {
            .page-hero {
                padding: 48px 0 40px;
                min-height: 220px;
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header h2 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
        }
        .section-dark .section-header h2 {
            color: var(--text-white);
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.8);
        }
        @media(max-width:768px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }
        @media(max-width:520px) {
            .section {
                padding: 36px 0;
            }
            .section-header {
                margin-bottom: 24px;
            }
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        }
        @media(max-width:768px) {
            .card-grid {
                gap: 16px;
            }
            .card-grid-3 {
                grid-template-columns: 1fr;
            }
        }
        @media(max-width:520px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--border-light);
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-image img {
            transform: scale(1.05);
        }
        .card-image .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card-body h3 a {
            color: inherit;
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 12px;
            flex: 1;
        }
        .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-light);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
            margin-top: auto;
        }
        .card-body .meta i {
            margin-right: 4px;
            color: var(--secondary-light);
        }
        .card-body .btn {
            align-self: flex-start;
            margin-top: 12px;
        }
        @media(max-width:768px) {
            .card-body {
                padding: 16px 18px 20px;
            }
            .card-body h3 {
                font-size: 1.05rem;
            }
        }

        /* ===== Button ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 50px;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.4);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(29, 53, 87, 0.25);
        }
        .btn-secondary:hover {
            background: #142742;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(29, 53, 87, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--secondary);
            border: 2px solid var(--secondary);
        }
        .btn-outline:hover {
            background: var(--secondary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-light {
            background: var(--text-white);
            color: var(--secondary);
        }
        .btn-light:hover {
            background: var(--accent-light);
            color: var(--secondary);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
        }
        @media(max-width:520px) {
            .btn {
                padding: 10px 22px;
                font-size: 0.95rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
        }

        /* ===== Tag / Badge ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 16px 0;
        }
        .tag-list a {
            display: inline-block;
            padding: 6px 18px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 50px;
            font-size: 0.9rem;
            color: var(--text-light);
            transition: var(--transition);
        }
        .tag-list a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .badge-hot {
            background: #fee2e2;
            color: #dc2626;
        }
        .badge-new {
            background: #dbeafe;
            color: #2563eb;
        }
        .badge-top {
            background: #fef3c7;
            color: #d97706;
        }

        /* ===== Guide Section (特色板块) ===== */
        .guide-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .guide-intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .guide-intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }
        .guide-intro-content h2 {
            margin-bottom: 16px;
        }
        .guide-intro-content p {
            font-size: 1.05rem;
            line-height: 1.8;
        }
        .guide-intro-content .feature-list {
            margin: 20px 0 0;
        }
        .guide-intro-content .feature-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            font-size: 1rem;
            color: var(--text);
            border-bottom: 1px solid var(--border-light);
        }
        .guide-intro-content .feature-list li i {
            color: var(--primary);
            font-size: 1.2rem;
            width: 24px;
            text-align: center;
        }
        @media(max-width:768px) {
            .guide-intro {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .guide-intro-image {
                order: -1;
            }
            .guide-intro-image img {
                min-height: 220px;
            }
        }

        /* ===== Steps / Timeline ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            counter-increment: step;
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            content: counter(step);
            display: block;
            width: 48px;
            height: 48px;
            line-height: 48px;
            margin: 0 auto 16px;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            border-radius: 50%;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.25);
        }
        .step-item h4 {
            margin-bottom: 8px;
            font-size: 1.1rem;
        }
        .step-item p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        @media(max-width:768px) {
            .steps {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-item {
                padding: 24px 16px;
            }
        }
        @media(max-width:520px) {
            .steps {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--text-light);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media(max-width:768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 1rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: 80px 0;
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        @media(max-width:768px) {
            .cta-section {
                padding: 56px 0;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #0d1b2a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer .logo {
            color: var(--text-white);
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .footer .logo span {
            color: var(--primary-light);
        }
        .footer p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            max-width: 360px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-grid h4 {
            color: var(--text-white);
            font-size: 1.05rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover {
            color: var(--accent-light);
            transform: translateX(4px);
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        @media(max-width:768px) {
            .footer {
                padding: 40px 0 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .footer-brand {
                grid-column: 1/-1;
            }
        }
        @media(max-width:520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Mobile Nav Overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.3);
            z-index: 998;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .nav-overlay.show {
            opacity: 1;
        }
        @media(max-width:768px) {
            .nav-overlay.show {
                display: block;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Table (参考资料用) ===== */
        .table-wrap {
            overflow-x: auto;
            margin: 24px 0;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
        }
        .table-wrap table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            background: var(--bg-alt);
        }
        .table-wrap th,
        .table-wrap td {
            padding: 14px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-light);
        }
        .table-wrap th {
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.5px;
        }
        .table-wrap tr:last-child td {
            border-bottom: none;
        }
        .table-wrap tr:hover td {
            background: rgba(230, 57, 70, 0.03);
        }
        @media(max-width:768px) {
            .table-wrap th,
            .table-wrap td {
                padding: 10px 14px;
                font-size: 0.85rem;
            }
        }

        /* ===== 分类入口卡片 ===== */
        .cat-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .cat-card i {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }
        .cat-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .cat-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== 滚动动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ===== :root 设计变量 ===== */
        :root {
            --color-primary: #d4262a;
            --color-primary-dark: #b01e22;
            --color-primary-light: #fbe9e9;
            --color-secondary: #f5c518;
            --color-secondary-dark: #d9a800;
            --color-bg: #f8f6f2;
            --color-bg-alt: #ffffff;
            --color-bg-card: #ffffff;
            --color-bg-dark: #1a1a2e;
            --color-text: #1e1e2a;
            --color-text-light: #6b6b7d;
            --color-text-muted: #9898a8;
            --color-border: #e8e4de;
            --color-border-light: #f0ece6;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.08);
            --shadow-xl: 0 24px 64px rgba(0,0,0,0.10);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 76px;
            --space-section: 72px;
            --space-block: 40px;
            --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
            padding-top: var(--header-h);
        }
        a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--color-primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--color-text); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i { color: var(--color-primary); font-size: 1.5rem; }
        .logo span { color: var(--color-primary); font-weight: 700; }
        .logo:hover { color: var(--color-text); }

        /* 搜索框 */
        .header-search {
            display: flex;
            align-items: center;
            flex: 1;
            max-width: 420px;
            background: var(--color-bg);
            border-radius: 50px;
            border: 1.5px solid var(--color-border);
            padding: 0 6px 0 18px;
            transition: var(--transition);
        }
        .header-search:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(212,38,42,0.08);
        }
        .header-search input {
            flex: 1;
            padding: 10px 0;
            background: transparent;
            color: var(--color-text);
            font-size: 0.95rem;
            min-width: 0;
        }
        .header-search input::placeholder { color: var(--color-text-muted); }
        .header-search button {
            width: 38px; height: 38px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            cursor: pointer;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .header-search button:hover { background: var(--color-primary-dark); transform: scale(1.03); }

        /* 导航链接 */
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-text-light);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .nav a i { font-size: 0.9rem; }
        .nav a:hover { background: var(--color-primary-light); color: var(--color-primary); }
        .nav a.active { background: var(--color-primary); color: #fff; box-shadow: 0 4px 12px rgba(212,38,42,0.25); }

        /* 汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            cursor: pointer;
            padding: 6px;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            width: 26px; height: 3px;
            background: var(--color-text);
            border-radius: 4px;
            transition: var(--transition);
        }

        .mobile-search { display: none; }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            padding: 20px 0 8px;
            font-size: 0.9rem;
            color: var(--color-text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .breadcrumb a { color: var(--color-text-light); }
        .breadcrumb a:hover { color: var(--color-primary); }
        .breadcrumb span { color: var(--color-text-muted); }

        /* ===== 文章主体 ===== */
        .article-wrapper {
            padding: var(--space-block) 0 var(--space-section);
        }
        .article-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-main { min-width: 0; }
        .article-sidebar { min-width: 0; }

        /* 文章头部 */
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 28px;
            border-bottom: 1px solid var(--color-border);
        }
        .article-category {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--color-text-light);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 6px; color: var(--color-primary); }
        .article-meta span { display: flex; align-items: center; }

        /* 文章封面 */
        .article-cover {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 32px;
            box-shadow: var(--shadow-md);
        }
        .article-cover img { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; }

        /* 文章正文 */
        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin-top: 32px;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .article-content h2 { font-size: 1.6rem; border-left: 4px solid var(--color-primary); padding-left: 16px; }
        .article-content h3 { font-size: 1.25rem; }
        .article-content p { margin-bottom: 1.2rem; }
        .article-content a { color: var(--color-primary); text-decoration: underline; }
        .article-content ul, .article-content ol { margin-bottom: 1.2rem; padding-left: 24px; }
        .article-content li { margin-bottom: 6px; }
        .article-content ul li { list-style: disc; }
        .article-content ol li { list-style: decimal; }
        .article-content img { border-radius: var(--radius-sm); margin: 20px 0; box-shadow: var(--shadow-sm); }
        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: var(--color-primary-light);
            padding: 16px 24px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--color-text-light);
        }
        .article-content pre {
            background: var(--color-bg-dark);
            color: #f0f0f0;
            padding: 20px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
        }
        .article-content hr {
            border: none;
            height: 1px;
            background: var(--color-border);
            margin: 32px 0;
        }

        /* 文章标签 */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 32px 0 24px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
        }
        .article-tags a {
            padding: 6px 16px;
            border-radius: 50px;
            background: var(--color-bg);
            color: var(--color-text-light);
            font-size: 0.85rem;
            border: 1px solid var(--color-border);
        }
        .article-tags a:hover { background: var(--color-primary-light); color: var(--color-primary); border-color: var(--color-primary); }

        /* 文章导航 */
        .article-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--color-border);
        }
        .article-nav a {
            display: flex;
            flex-direction: column;
            padding: 18px 22px;
            border-radius: var(--radius-md);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .article-nav a:hover { background: var(--color-bg-card); box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .article-nav .nav-label { font-size: 0.8rem; color: var(--color-text-muted); margin-bottom: 4px; }
        .article-nav .nav-title { font-weight: 600; color: var(--color-text); }
        .article-nav a:first-child { text-align: left; }
        .article-nav a:last-child { text-align: right; }

        /* ===== 侧边栏 ===== */
        .sidebar-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            padding: 24px;
            margin-bottom: 24px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--color-primary-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--color-primary); }

        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--color-text);
            font-size: 0.95rem;
        }
        .sidebar-list a:hover { color: var(--color-primary); }
        .sidebar-list .badge {
            background: var(--color-primary-light);
            color: var(--color-primary);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--color-primary) 0%, #b01e22 100%);
            color: #fff;
            padding: 28px 24px;
            border-radius: var(--radius-md);
            text-align: center;
        }
        .sidebar-cta h4 { color: #fff; font-size: 1.15rem; margin-bottom: 8px; }
        .sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.9rem; margin-bottom: 16px; }
        .sidebar-cta .btn {
            background: var(--color-secondary);
            color: var(--color-text);
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            display: inline-block;
        }
        .sidebar-cta .btn:hover { background: var(--color-secondary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.15); }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: var(--space-section) 0;
            background: var(--color-bg-alt);
        }
        .related-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-header h2 { font-size: 1.8rem; }
        .related-header p { color: var(--color-text-light); margin-top: 8px; }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .related-card-body {
            padding: 20px;
        }
        .related-card-body h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card-body h4 a { color: var(--color-text); }
        .related-card-body h4 a:hover { color: var(--color-primary); }
        .related-card-body p { font-size: 0.9rem; color: var(--color-text-light); }
        .related-card-body .meta { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 10px; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            background: var(--color-primary);
            color: #fff;
        }
        .btn:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(212,38,42,0.2); color: #fff; }
        .btn-outline { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
        .btn-outline:hover { background: var(--color-primary); color: #fff; }
        .btn-secondary { background: var(--color-secondary); color: var(--color-text); }
        .btn-secondary:hover { background: var(--color-secondary-dark); }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 52px 0 0;
        }
        .footer .logo { color: #fff; margin-bottom: 16px; }
        .footer .logo span { color: var(--color-secondary); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 320px; }
        .footer-social { display: flex; gap: 14px; margin-top: 18px; }
        .footer-social a {
            width: 40px; height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; }
        .footer-links a:hover { color: var(--color-secondary); }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--color-secondary); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-grid { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            :root { --header-h: 64px; --space-section: 48px; --space-block: 28px; }
            .header-search { display: none; }
            .nav {
                position: fixed;
                top: var(--header-h); left: 0; right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 28px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                align-items: stretch;
                gap: 4px;
            }
            .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav a { padding: 12px 18px; justify-content: center; }
            .mobile-search { display: block; margin-bottom: 12px; }
            .mobile-search input {
                width: 100%;
                padding: 12px 18px;
                border-radius: 50px;
                background: var(--color-bg);
                border: 1.5px solid var(--color-border);
                font-size: 0.95rem;
            }
            .hamburger { display: flex; }
            .article-title { font-size: 1.6rem; }
            .article-content { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-nav { grid-template-columns: 1fr; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.2rem; }
            .article-title { font-size: 1.35rem; }
            .article-meta { gap: 12px; font-size: 0.8rem; }
            .sidebar-card { padding: 18px; }
            .related-card-body { padding: 16px; }
        }

        /* ===== 页面不存在 ===== */
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found i { font-size: 4rem; color: var(--color-text-muted); margin-bottom: 24px; }
        .not-found h1 { font-size: 2rem; margin-bottom: 16px; }
        .not-found p { color: var(--color-text-light); margin-bottom: 24px; }