/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #0f1923;
  --primary-light: #1a2d3d;
  --accent: #f0b90b;
  --accent-hover: #d4a309;
  --accent-light: #fef3d6;
  --bg-body: #f4f6f8;
  --bg-card: #ffffff;
  --bg-dark: #0b1219;
  --bg-section-alt: #eef1f5;
  --text-primary: #0f1923;
  --text-secondary: #4a5568;
  --text-muted: #8896a6;
  --text-light: #ffffff;
  --border: #e2e8f0;
  --border-light: #f0f2f5;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
  --shadow-card: 0 4px 16px rgba(0,0,0,0.06);
  --transition: all 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --container-max: 1240px;
  --header-height: 72px;
}

/* ===== Reset / Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-sans);background:var(--bg-body);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--accent);text-decoration:none;transition:var(--transition)}
a:hover{color:var(--accent-hover)}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
button,input,textarea,select{font-family:inherit;font-size:inherit;outline:none;border:none;background:transparent}
button{cursor:pointer}
.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 18px}}

/* ===== 辅助 ===== */
.section{padding:80px 0}
.section-alt{background:var(--bg-section-alt)}
.section-dark{background:var(--bg-dark);color:var(--text-light)}
.section-title{font-size:2.2rem;font-weight:800;line-height:1.25;margin-bottom:12px;letter-spacing:-0.02em}
.section-subtitle{font-size:1.08rem;color:var(--text-secondary);max-width:680px;margin-bottom:48px;line-height:1.6}
.section-dark .section-subtitle{color:rgba(255,255,255,0.6)}
.text-center{text-align:center}
.mx-auto{margin-left:auto;margin-right:auto}
.grid{display:grid;gap:28px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:1024px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.section{padding:56px 0}.section-title{font-size:1.7rem}}
@media(max-width:520px){.section-title{font-size:1.4rem}}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 34px;border-radius:50px;font-weight:600;font-size:1.02rem;letter-spacing:0.3px;transition:var(--transition);border:2px solid transparent;white-space:nowrap}
.btn-primary{background:var(--accent);color:var(--primary);border-color:var(--accent)}
.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:var(--primary);transform:translateY(-2px);box-shadow:0 8px 28px rgba(240,185,11,0.35)}
.btn-outline{background:transparent;color:var(--text-light);border-color:rgba(255,255,255,0.4)}
.btn-outline:hover{background:var(--accent);border-color:var(--accent);color:var(--primary);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--text-primary);border-color:var(--border)}
.btn-ghost:hover{background:var(--accent-light);border-color:var(--accent);color:var(--primary)}
.btn-sm{padding:9px 22px;font-size:0.9rem}
.btn-icon{width:48px;height:48px;padding:0;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}

/* ===== Header / Nav ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(15,25,35,0.92);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,0.06);height:var(--header-height);transition:var(--transition)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{font-size:1.5rem;font-weight:800;color:var(--text-light);letter-spacing:-0.03em;display:flex;align-items:center;gap:8px}
.logo i{color:var(--accent);font-size:1.6rem}
.logo span{background:linear-gradient(135deg,#fff 60%,var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.logo:hover{color:var(--text-light);opacity:0.9}
.nav{display:flex;align-items:center;gap:6px}
.nav-link{padding:8px 20px;border-radius:40px;color:rgba(255,255,255,0.75);font-weight:500;font-size:0.95rem;transition:var(--transition);position:relative}
.nav-link:hover{color:var(--text-light);background:rgba(255,255,255,0.08)}
.nav-link.active{color:var(--accent);background:rgba(240,185,11,0.12)}
.nav-link i{margin-right:6px;font-size:0.85rem}

/* Mega Dropdown */
.nav-item{position:relative}
.mega-dropdown{position:absolute;top:calc(100% + 12px);left:50%;transform:translateX(-50%) translateY(8px);background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:24px;min-width:400px;opacity:0;visibility:hidden;transition:var(--transition);pointer-events:none;border:1px solid var(--border)}
.nav-item:hover .mega-dropdown{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0);pointer-events:auto}
.mega-dropdown::before{content:'';position:absolute;top:-8px;left:50%;transform:translateX(-50%);border-left:8px solid transparent;border-right:8px solid transparent;border-bottom:8px solid var(--bg-card)}
.mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.mega-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border-radius:var(--radius-sm);transition:var(--transition);color:var(--text-primary);font-size:0.92rem;font-weight:500}
.mega-item:hover{background:var(--accent-light);color:var(--primary);transform:translateX(4px)}
.mega-item i{color:var(--accent);font-size:1.1rem;width:24px;text-align:center}
.mega-tag{display:inline-block;font-size:0.7rem;background:var(--accent);color:var(--primary);padding:2px 10px;border-radius:30px;font-weight:700;margin-left:6px;letter-spacing:0.3px}

/* Mobile Toggle */
.mobile-toggle{display:none;flex-direction:column;gap:5px;padding:8px;cursor:pointer;background:transparent;border:none}
.mobile-toggle span{display:block;width:26px;height:2.5px;background:var(--text-light);border-radius:4px;transition:var(--transition)}
.mobile-menu{display:none;position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background:rgba(15,25,35,0.98);backdrop-filter:blur(20px);padding:32px 24px;flex-direction:column;gap:8px;overflow-y:auto;z-index:999}
.mobile-menu.show{display:flex}
.mobile-menu .nav-link{padding:14px 20px;font-size:1.1rem;border-bottom:1px solid rgba(255,255,255,0.05)}
.mobile-menu .nav-link.active{background:rgba(240,185,11,0.1)}

@media(max-width:768px){
  .nav{display:none}
  .mobile-toggle{display:flex}
  .mega-dropdown{display:none!important}
}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;margin-top:0;padding-top:var(--header-height);overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center center/cover no-repeat;filter:brightness(0.35) saturate(1.1);z-index:0}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,25,35,0.88) 0%,rgba(15,25,35,0.5) 60%,rgba(240,185,11,0.12) 100%);z-index:1}
.hero .container{position:relative;z-index:2;width:100%;padding-top:40px;padding-bottom:80px}
.hero-content{max-width:760px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(240,185,11,0.15);border:1px solid rgba(240,185,11,0.25);border-radius:50px;padding:6px 18px 6px 12px;font-size:0.85rem;color:var(--accent);margin-bottom:24px;backdrop-filter:blur(4px)}
.hero-badge i{font-size:0.75rem}
.hero-title{font-size:3.6rem;font-weight:900;line-height:1.12;color:var(--text-light);letter-spacing:-0.03em;margin-bottom:20px}
.hero-title em{color:var(--accent);font-style:normal}
.hero-desc{font-size:1.15rem;color:rgba(255,255,255,0.7);max-width:600px;line-height:1.7;margin-bottom:36px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:flex;flex-wrap:wrap;gap:40px;margin-top:50px;padding-top:36px;border-top:1px solid rgba(255,255,255,0.08)}
.hero-stat{text-align:left}
.hero-stat-num{font-size:2.2rem;font-weight:800;color:var(--text-light);letter-spacing:-0.02em}
.hero-stat-num i{color:var(--accent);font-size:1.4rem;margin-right:6px}
.hero-stat-label{font-size:0.88rem;color:rgba(255,255,255,0.5);margin-top:2px}

@media(max-width:1024px){
  .hero-title{font-size:2.8rem}
  .hero-desc{font-size:1.05rem}
}
@media(max-width:768px){
  .hero{min-height:auto;padding-top:var(--header-height)}
  .hero-content{padding:30px 0 50px}
  .hero-title{font-size:2rem}
  .hero-desc{font-size:0.95rem}
  .hero-stats{gap:24px;margin-top:32px;padding-top:24px}
  .hero-stat-num{font-size:1.6rem}
}
@media(max-width:520px){
  .hero-title{font-size:1.6rem}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%;justify-content:center}
}

/* ===== 板块通用 ===== */
.section-header{margin-bottom:44px}
.section-header .section-title{margin-bottom:8px}
.section-header .section-subtitle{margin-bottom:0}

/* ===== 卡片 ===== */
.card{background:var(--bg-card);border-radius:var(--radius-md);box-shadow:var(--shadow-card);overflow:hidden;transition:var(--transition);border:1px solid var(--border-light)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:rgba(240,185,11,0.15)}
.card-img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;transition:var(--transition)}
.card:hover .card-img{transform:scale(1.03)}
.card-body{padding:22px 24px 26px}
.card-tag{display:inline-block;font-size:0.72rem;font-weight:700;text-transform:uppercase;letter-spacing:0.5px;padding:4px 14px;border-radius:30px;background:var(--accent-light);color:var(--accent-hover);margin-bottom:12px}
.card-title{font-size:1.12rem;font-weight:700;line-height:1.35;margin-bottom:8px;color:var(--text-primary)}
.card-text{font-size:0.92rem;color:var(--text-secondary);line-height:1.6;margin-bottom:16px}
.card-meta{display:flex;align-items:center;gap:16px;font-size:0.82rem;color:var(--text-muted)}
.card-meta i{margin-right:4px;font-size:0.75rem}
.card-link{font-weight:600;color:var(--accent);display:inline-flex;align-items:center;gap:6px;font-size:0.92rem}
.card-link:hover{gap:12px;color:var(--accent-hover)}

/* ===== 分类卡片 (竖向封面) ===== */
.cat-card{background:var(--bg-card);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-card);transition:var(--transition);border:1px solid var(--border-light);position:relative}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:rgba(240,185,11,0.15)}
.cat-card-img{width:100%;aspect-ratio:3/4;object-fit:cover;display:block;transition:var(--transition)}
.cat-card:hover .cat-card-img{transform:scale(1.04)}
.cat-card-overlay{position:absolute;bottom:0;left:0;right:0;padding:30px 20px 20px;background:linear-gradient(transparent,rgba(15,25,35,0.85));color:var(--text-light)}
.cat-card-title{font-size:1.15rem;font-weight:700;margin-bottom:4px}
.cat-card-count{font-size:0.82rem;opacity:0.7}
.cat-card-badge{position:absolute;top:14px;left:14px;background:var(--accent);color:var(--primary);font-size:0.7rem;font-weight:700;padding:4px 14px;border-radius:30px;letter-spacing:0.3px}

/* ===== 特色/优势卡片 ===== */
.feature-card{text-align:center;padding:36px 24px 30px;border-radius:var(--radius-md);background:var(--bg-card);border:1px solid var(--border-light);transition:var(--transition);box-shadow:var(--shadow-sm)}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:rgba(240,185,11,0.2)}
.feature-icon{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:1.6rem;background:var(--accent-light);color:var(--accent-hover)}
.feature-card h4{font-size:1.1rem;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:0.92rem;color:var(--text-secondary);line-height:1.6}

/* ===== 统计数字 ===== */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-item{text-align:center;padding:32px 16px;background:rgba(255,255,255,0.05);border-radius:var(--radius-md);border:1px solid rgba(255,255,255,0.06);transition:var(--transition)}
.stat-item:hover{background:rgba(255,255,255,0.08);transform:translateY(-3px)}
.stat-number{font-size:2.6rem;font-weight:800;color:var(--accent);line-height:1.1;letter-spacing:-0.02em}
.stat-label{font-size:0.92rem;color:rgba(255,255,255,0.55);margin-top:6px}
@media(max-width:768px){.stat-grid{grid-template-columns:repeat(2,1fr)}.stat-number{font-size:1.8rem}}
@media(max-width:520px){.stat-grid{grid-template-columns:1fr 1fr;gap:12px}.stat-item{padding:20px 12px}}

/* ===== 资讯/文章列表 ===== */
.post-list{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;box-shadow:var(--shadow-card);border:1px solid var(--border-light);transition:var(--transition)}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(240,185,11,0.12)}
.post-card-img{width:100%;aspect-ratio:16/9;object-fit:cover}
.post-card-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.post-card-cat{font-size:0.72rem;font-weight:700;color:var(--accent-hover);text-transform:uppercase;letter-spacing:0.5px;margin-bottom:6px}
.post-card-title{font-size:1.05rem;font-weight:700;line-height:1.35;margin-bottom:8px;color:var(--text-primary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card-excerpt{font-size:0.88rem;color:var(--text-secondary);line-height:1.6;margin-bottom:14px;flex:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card-meta{display:flex;align-items:center;justify-content:space-between;font-size:0.8rem;color:var(--text-muted);border-top:1px solid var(--border-light);padding-top:14px;margin-top:auto}
.post-card-meta i{margin-right:4px}
@media(max-width:768px){.post-list{grid-template-columns:1fr}}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{border-radius:var(--radius-sm);border:1px solid var(--border);overflow:hidden;background:var(--bg-card);transition:var(--transition)}
.faq-item:hover{border-color:rgba(240,185,11,0.2)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;padding:18px 22px;font-size:1rem;font-weight:600;color:var(--text-primary);background:transparent;text-align:left;transition:var(--transition);gap:12px}
.faq-question i{color:var(--accent);font-size:0.85rem;transition:var(--transition);flex-shrink:0}
.faq-item.active .faq-question i{transform:rotate(180deg)}
.faq-answer{padding:0 22px 18px;font-size:0.92rem;color:var(--text-secondary);line-height:1.7;display:none}
.faq-item.active .faq-answer{display:block}
.faq-item.active{border-color:var(--accent);box-shadow:0 2px 16px rgba(240,185,11,0.08)}

/* ===== CTA ===== */
.cta-section{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center center/cover no-repeat;opacity:0.08;mix-blend-mode:overlay}
.cta-content{position:relative;z-index:1;text-align:center;padding:60px 0}
.cta-content h2{font-size:2.4rem;font-weight:800;color:var(--text-light);margin-bottom:14px;letter-spacing:-0.02em}
.cta-content p{font-size:1.08rem;color:rgba(255,255,255,0.6);max-width:600px;margin:0 auto 32px}
.cta-content .btn{margin:0 6px}
@media(max-width:768px){
  .cta-content h2{font-size:1.6rem}
  .cta-content p{font-size:0.95rem}
  .cta-content .btn{margin:4px}
}

/* ===== Footer ===== */
.footer{background:var(--bg-dark);color:rgba(255,255,255,0.6);padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.06)}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{font-size:0.9rem;line-height:1.7;max-width:360px}
.footer h5{color:var(--text-light);font-size:0.95rem;font-weight:700;margin-bottom:18px}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{color:rgba(255,255,255,0.5);font-size:0.88rem;transition:var(--transition);display:flex;align-items:center;gap:6px}
.footer-links a:hover{color:var(--accent);transform:translateX(4px)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding:20px 0;font-size:0.82rem;color:rgba(255,255,255,0.3);flex-wrap:wrap;gap:8px}
.footer-bottom a{color:rgba(255,255,255,0.3)}
.footer-bottom a:hover{color:var(--accent)}
@media(max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr;gap:24px}.footer-bottom{flex-direction:column;text-align:center}}

/* ===== 空状态 ===== */
.empty-state{text-align:center;padding:48px 24px;color:var(--text-muted)}
.empty-state i{font-size:3rem;margin-bottom:16px;opacity:0.4}
.empty-state p{font-size:1rem}

/* ===== 搜索框 ===== */
.search-box{display:flex;max-width:480px;background:rgba(255,255,255,0.08);border-radius:50px;border:1px solid rgba(255,255,255,0.12);overflow:hidden;transition:var(--transition);backdrop-filter:blur(4px)}
.search-box:focus-within{border-color:var(--accent);background:rgba(255,255,255,0.12)}
.search-box input{flex:1;padding:12px 20px;background:transparent;color:var(--text-light);font-size:0.95rem;min-width:0}
.search-box input::placeholder{color:rgba(255,255,255,0.35)}
.search-box button{padding:12px 24px;background:var(--accent);color:var(--primary);font-weight:600;font-size:0.9rem;border-radius:0 50px 50px 0;transition:var(--transition)}
.search-box button:hover{background:var(--accent-hover)}

/* ===== 分隔线 ===== */
.divider{width:60px;height:3.5px;background:var(--accent);border-radius:4px;margin:0 auto 16px}
.divider-left{margin:0 0 16px}

/* ===== 标签 ===== */
.tag{display:inline-flex;align-items:center;gap:4px;padding:4px 14px;border-radius:30px;font-size:0.75rem;font-weight:600;background:var(--accent-light);color:var(--accent-hover);transition:var(--transition)}
.tag:hover{background:var(--accent);color:var(--primary)}
.tag-hot{background:#fee2e2;color:#dc2626}
.tag-new{background:#dbeafe;color:#2563eb}

/* ===== 动画 ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.anim-fade-up{animation:fadeUp 0.6s ease forwards}

/* ===== 排行列表 ===== */
.rank-list{counter-reset:rank;display:flex;flex-direction:column;gap:10px}
.rank-item{display:flex;align-items:center;gap:16px;padding:14px 20px;background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border-light);transition:var(--transition);counter-increment:rank}
.rank-item:hover{transform:translateX(6px);border-color:rgba(240,185,11,0.2);box-shadow:var(--shadow-sm)}
.rank-item::before{content:'#' counter(rank);font-weight:800;font-size:1.1rem;color:var(--accent);min-width:36px}
.rank-item img{width:48px;height:48px;border-radius:8px;object-fit:cover}
.rank-info{flex:1}
.rank-info h5{font-size:0.95rem;font-weight:600;margin-bottom:2px}
.rank-info span{font-size:0.8rem;color:var(--text-muted)}
.rank-score{font-weight:700;color:var(--accent-hover);font-size:0.95rem}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg-body)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-hover: #c1121f;
            --primary-light: rgba(230, 57, 70, 0.08);
            --secondary: #1d3557;
            --secondary-hover: #14253d;
            --accent: #f4a261;
            --accent-hover: #e08e4a;
            --bg: #f8f9fa;
            --bg-dark: #0d1b2a;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #f1f1f1;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 18px 48px rgba(0, 0, 0, 0.14);
            --transition: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --nav-height: 68px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2.2rem;
            margin-bottom: 0.5rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Utility ===== */
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            max-width: 620px;
            margin: 0.75rem auto 0;
            font-size: 1.05rem;
        }
        .badge {
            display: inline-block;
            padding: 2px 12px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .badge-hot {
            background: #fee2e2;
            color: #dc2626;
        }
        .badge-new {
            background: #dbeafe;
            color: #2563eb;
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.78rem;
            border-radius: 50px;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: default;
        }
        .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 1rem;
        }
        .mt-2 {
            margin-top: 2rem;
        }
        .mb-1 {
            margin-bottom: 1rem;
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.02);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--secondary) 30%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-link i {
            font-size: 0.9rem;
            color: var(--text-light);
            transition: var(--transition);
        }
        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-link:hover i {
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .nav-link.active i {
            color: #fff;
        }
        .nav-item {
            position: relative;
        }
        .nav-item:hover .mega-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
            pointer-events: auto;
        }
        .mega-dropdown {
            position: absolute;
            top: calc(100% + 8px);
            left: 50%;
            transform: translateX(-50%) translateY(6px);
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-lg);
            padding: 20px 24px;
            min-width: 480px;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            z-index: 100;
        }
        .mega-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }
        .mega-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
        }
        .mega-item i {
            width: 20px;
            color: var(--primary);
            font-size: 0.95rem;
        }
        .mega-item:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mega-tag {
            font-size: 0.6rem;
            font-weight: 700;
            padding: 1px 8px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            margin-left: auto;
            letter-spacing: 0.2px;
        }
        .mega-tag:has(+ .mega-tag) {
            margin-right: 4px;
        }
        .nav-toggle {
            display: none;
            background: none;
            font-size: 1.6rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            cursor: pointer;
        }
        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            margin-top: var(--nav-height);
            padding: 80px 0 70px;
            position: relative;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 100%);
            min-height: 320px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(230, 57, 70, 0.15) 0%, transparent 60%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            color: #fff;
            font-size: 3rem;
            letter-spacing: -0.5px;
            margin-bottom: 0.5rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .page-hero p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0.5rem auto 0;
        }
        .hero-breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 1.2rem;
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .hero-breadcrumb a:hover {
            color: var(--accent);
        }
        .hero-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #fff;
        }
        .section-dark .section-title h2 {
            color: #fff;
        }
        .section-dark .section-title p {
            color: rgba(255, 255, 255, 0.65);
        }
        .section-dark .section-title h2::after {
            background: var(--accent);
        }

        /* ===== Category Cards Grid ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }
        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: transparent;
        }
        .cat-card .card-img {
            position: relative;
            aspect-ratio: 3 / 4;
            overflow: hidden;
            background: var(--bg);
        }
        .cat-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .cat-card:hover .card-img img {
            transform: scale(1.05);
        }
        .cat-card .card-img .card-label {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 3px 14px;
            font-size: 0.7rem;
            font-weight: 700;
            border-radius: 50px;
            background: rgba(0, 0, 0, 0.65);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .cat-card .card-body {
            padding: 18px 16px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cat-card .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 4px;
        }
        .cat-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
            flex: 1;
        }
        .cat-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 16px 14px;
            border-top: 1px solid var(--border-light);
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .cat-card .card-footer .btn-sm {
            padding: 4px 16px;
            font-size: 0.78rem;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            transition: var(--transition);
        }
        .cat-card .card-footer .btn-sm:hover {
            background: var(--primary-hover);
            transform: scale(1.02);
        }
        .cat-card .card-footer .hot-count i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* ===== Hot / List Cards ===== */
        .hot-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .hot-card {
            display: flex;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .hot-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .hot-card .hot-img {
            flex-shrink: 0;
            width: 140px;
            height: 100px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg);
        }
        .hot-card .hot-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .hot-card:hover .hot-img img {
            transform: scale(1.04);
        }
        .hot-card .hot-info {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .hot-card .hot-info h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .hot-card .hot-info p {
            font-size: 0.82rem;
            color: var(--text-light);
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .hot-card .hot-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.75rem;
            color: var(--text-light);
        }
        .hot-card .hot-meta i {
            margin-right: 4px;
            color: var(--primary);
        }
        .hot-card .hot-meta .live-tag {
            color: var(--primary);
            font-weight: 600;
            animation: pulse-dot 1.6s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }

        /* ===== Guide Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 30px 16px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .step-item .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
            margin-top: 4px;
        }
        .step-item h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== Features / Live & Data ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .feature-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .feature-card .feature-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: var(--primary-light);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
        }
        .feature-card .feature-body h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .feature-card .feature-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-item summary {
            padding: 16px 22px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--primary);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .faq-item[open] summary i {
            transform: rotate(90deg);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--secondary) 0%, #14253d 100%);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-box .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 0.5rem;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 1.5rem;
            font-size: 1.05rem;
        }
        .cta-box .btn-cta {
            display: inline-block;
            padding: 14px 40px;
            font-size: 1.05rem;
            font-weight: 700;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.35);
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-box .btn-cta:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(230, 57, 70, 0.45);
        }
        .cta-box .btn-cta i {
            margin-right: 8px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            display: flex;
            align-items: center;
            gap: 8px;
            transition: var(--transition);
        }
        .footer-links a i {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-links a:hover i {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hot-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 60px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .page-hero {
                padding: 60px 0 50px;
                min-height: 240px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                margin-bottom: 2rem;
            }
            .nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(14px);
                padding: 16px 24px 24px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-light);
                gap: 4px;
            }
            .nav.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-item {
                width: 100%;
            }
            .mega-dropdown {
                position: static;
                transform: none;
                opacity: 1;
                visibility: visible;
                pointer-events: auto;
                box-shadow: none;
                padding: 12px 0 0 16px;
                min-width: auto;
                border: none;
                display: none;
            }
            .nav-item:hover .mega-dropdown,
            .nav-item.active-mobile .mega-dropdown {
                display: block;
            }
            .mega-grid {
                grid-template-columns: 1fr;
                gap: 4px;
            }
            .mega-item {
                padding: 8px 12px;
                font-size: 0.85rem;
            }
            .nav-toggle {
                display: block;
            }
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .cat-card .card-img {
                aspect-ratio: 4 / 5;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .feature-card {
                padding: 20px 18px;
            }
            .hot-card {
                flex-direction: column;
                padding: 14px;
            }
            .hot-card .hot-img {
                width: 100%;
                height: 140px;
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.85rem;
            }
            .cta-box {
                padding: 40px 24px;
                border-radius: var(--radius-md);
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .cta-box .btn-cta {
                padding: 12px 32px;
                font-size: 0.95rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .cat-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .cat-card .card-img {
                aspect-ratio: 16 / 9;
            }
            .hot-card .hot-img {
                height: 120px;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .step-item {
                padding: 24px 12px 20px;
            }
        }

/* roulang page: article */
:root {
  --primary: #e51937;
  --primary-dark: #b0102a;
  --primary-light: #ff4d6a;
  --secondary: #0b1a2f;
  --secondary-light: #1a3050;
  --accent: #f7c948;
  --bg: #f5f7fa;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-light: #5a6a7a;
  --text-white: #ffffff;
  --border: #e2e6ee;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 8px 30px rgba(0,0,0,0.06);
  --shadow-hover: 0 16px 48px rgba(0,0,0,0.12);
  --shadow-lg: 0 24px 64px rgba(0,0,0,0.16);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --container: 1200px;
  --gap: 32px;
  --gap-sm: 20px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);font-size:16px;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
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{font-family:inherit;font-size:inherit;border:none;outline:none}
button{cursor:pointer}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gap)}@media(max-width:768px){.container{padding:0 var(--gap-sm)}}

/* Header & Nav */
.header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,0.92);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--border);box-shadow:0 2px 20px rgba(0,0,0,0.04)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:800;color:var(--secondary);letter-spacing:-0.5px}
.logo i{color:var(--primary);font-size:1.6rem}.logo span{background:linear-gradient(135deg,var(--secondary),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav{display:flex;align-items:center;gap:6px}.nav-link{display:flex;align-items:center;gap:8px;padding:10px 18px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:600;color:var(--text-light);transition:var(--transition);position:relative}
.nav-link i{font-size:0.9rem;color:var(--primary);opacity:0.7;transition:var(--transition)}
.nav-link:hover{background:rgba(229,25,55,0.06);color:var(--primary)}.nav-link:hover i{opacity:1}
.nav-link.active{background:rgba(229,25,55,0.1);color:var(--primary)}.nav-link.active i{opacity:1;color:var(--primary)}
.nav-item{position:relative}.mega-dropdown{position:absolute;top:100%;left:0;background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow-hover);padding:20px 24px;min-width:520px;opacity:0;visibility:hidden;transform:translateY(10px);transition:var(--transition);border:1px solid var(--border);z-index:100}
.nav-item:hover .mega-dropdown{opacity:1;visibility:visible;transform:translateY(6px)}
.mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.mega-item{display:flex;align-items:center;gap:10px;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text);font-weight:500;font-size:0.92rem;transition:var(--transition);background:var(--bg)}
.mega-item i{color:var(--primary);font-size:1.1rem;width:22px;text-align:center}
.mega-item:hover{background:rgba(229,25,55,0.08);color:var(--primary);transform:translateX(4px)}
.mega-tag{background:var(--primary);color:#fff;font-size:0.65rem;padding:2px 8px;border-radius:20px;font-weight:700;letter-spacing:0.3px;margin-left:auto}
.nav-toggle{display:none;background:none;font-size:1.5rem;color:var(--secondary);padding:8px;border-radius:var(--radius-xs);transition:var(--transition)}
.nav-toggle:hover{background:rgba(0,0,0,0.04)}
@media(max-width:900px){
  .nav{position:fixed;top:72px;left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(18px);flex-direction:column;padding:16px 20px 24px;border-bottom:1px solid var(--border);box-shadow:var(--shadow);transform:translateY(-120%);opacity:0;transition:var(--transition);gap:4px;max-height:calc(100vh-100px);overflow-y:auto;z-index:999}
  .nav.open{transform:translateY(0);opacity:1}
  .nav-link,.nav-item{width:100%}.nav-link{padding:12px 16px;justify-content:flex-start}
  .mega-dropdown{position:static;box-shadow:none;border:none;padding:8px 0 8px 20px;min-width:auto;opacity:1;visibility:visible;transform:none;display:none;background:transparent}
  .nav-item:hover .mega-dropdown{display:block}.mega-grid{grid-template-columns:1fr 1fr;gap:8px}
  .nav-toggle{display:block}
}

/* Hero Banner */
.article-hero{position:relative;padding:80px 0 60px;background:var(--secondary);overflow:hidden}
.article-hero::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:0.2;z-index:0}
.article-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(11,26,47,0.92) 0%,rgba(229,25,55,0.6) 100%);z-index:1}
.article-hero .container{position:relative;z-index:2}
.article-hero .breadcrumb{display:flex;align-items:center;gap:10px;font-size:0.85rem;color:rgba(255,255,255,0.7);margin-bottom:20px}
.article-hero .breadcrumb a{color:rgba(255,255,255,0.8)}.article-hero .breadcrumb a:hover{color:#fff}
.article-hero .breadcrumb span{color:var(--accent)}
.article-hero .post-category{display:inline-block;background:var(--primary);color:#fff;padding:4px 16px;border-radius:20px;font-size:0.8rem;font-weight:700;letter-spacing:0.5px;margin-bottom:16px}
.article-hero h1{font-size:2.6rem;font-weight:800;color:var(--text-white);line-height:1.25;max-width:860px;margin-bottom:16px;letter-spacing:-0.5px}
.article-hero .post-meta{display:flex;flex-wrap:wrap;gap:20px;color:rgba(255,255,255,0.8);font-size:0.92rem}
.article-hero .post-meta i{color:var(--accent);margin-right:6px;width:16px;text-align:center}
@media(max-width:768px){
  .article-hero{padding:48px 0 36px}.article-hero h1{font-size:1.8rem}
  .article-hero .post-meta{gap:12px;font-size:0.85rem}
}
@media(max-width:520px){.article-hero h1{font-size:1.5rem}}

/* Article Content */
.article-main{padding:48px 0 60px}
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:48px;align-items:start}
.article-body{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);padding:48px;overflow:hidden}
.article-body .post-content{font-size:1.05rem;line-height:1.9;color:var(--text)}
.article-body .post-content p{margin-bottom:1.4em}
.article-body .post-content h2{font-size:1.6rem;font-weight:700;margin:2em 0 0.8em;color:var(--secondary);letter-spacing:-0.3px}
.article-body .post-content h3{font-size:1.25rem;font-weight:700;margin:1.6em 0 0.6em;color:var(--secondary)}
.article-body .post-content ul,.article-body .post-content ol{padding-left:1.6em;margin-bottom:1.4em}
.article-body .post-content li{margin-bottom:0.4em}
.article-body .post-content ul li{list-style:disc}
.article-body .post-content ol li{list-style:decimal}
.article-body .post-content img{border-radius:var(--radius-sm);margin:1.6em 0;box-shadow:var(--shadow)}
.article-body .post-content blockquote{border-left:4px solid var(--primary);background:rgba(229,25,55,0.04);padding:16px 24px;margin:1.6em 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-light);font-style:italic}
.article-body .post-content a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-body .post-content a:hover{color:var(--primary-dark)}

.article-sidebar{display:flex;flex-direction:column;gap:24px}
.sidebar-card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px}
.sidebar-card h4{font-size:1.1rem;font-weight:700;color:var(--secondary);margin-bottom:16px;display:flex;align-items:center;gap:8px}
.sidebar-card h4 i{color:var(--primary)}
.sidebar-list{display:flex;flex-direction:column;gap:12px}
.sidebar-list a{display:flex;align-items:center;gap:12px;padding:12px;border-radius:var(--radius-sm);background:var(--bg);color:var(--text);font-size:0.92rem;font-weight:500;transition:var(--transition)}
.sidebar-list a:hover{background:rgba(229,25,55,0.07);color:var(--primary);transform:translateX(4px)}
.sidebar-list a .thumb{width:48px;height:48px;border-radius:var(--radius-xs);object-fit:cover;flex-shrink:0;background:var(--border)}
.sidebar-list a .info{flex:1;min-width:0}.sidebar-list a .info .t{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-list a .info .d{font-size:0.75rem;color:var(--text-light);margin-top:2px}

.post-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.post-tags .tag{display:inline-block;padding:6px 16px;border-radius:20px;background:var(--bg);color:var(--text-light);font-size:0.82rem;font-weight:500;transition:var(--transition);border:1px solid var(--border)}
.post-tags .tag:hover{background:rgba(229,25,55,0.08);color:var(--primary);border-color:var(--primary);transform:translateY(-2px)}
.post-share{display:flex;align-items:center;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border)}
.post-share span{font-size:0.9rem;font-weight:600;color:var(--text-light)}
.post-share a{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;background:var(--bg);color:var(--text-light);transition:var(--transition);font-size:1rem}
.post-share a:hover{background:var(--primary);color:#fff;transform:translateY(-3px);box-shadow:0 6px 16px rgba(229,25,55,0.3)}

@media(max-width:1024px){.article-layout{grid-template-columns:1fr}.article-sidebar{display:grid;grid-template-columns:1fr 1fr;gap:20px}}
@media(max-width:768px){
  .article-main{padding:32px 0 40px}.article-body{padding:24px}
  .article-body .post-content{font-size:1rem}.article-sidebar{grid-template-columns:1fr}
}
@media(max-width:520px){.article-body{padding:16px;border-radius:var(--radius-sm)}}

/* Not Found */
.not-found{text-align:center;padding:60px 20px}
.not-found i{font-size:3.5rem;color:var(--primary);opacity:0.5;margin-bottom:16px}
.not-found h2{font-size:1.8rem;color:var(--secondary);margin-bottom:12px}
.not-found p{color:var(--text-light);margin-bottom:24px;font-size:1.05rem}
.not-found .btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:var(--radius-sm);font-weight:700;font-size:1rem;background:var(--primary);color:#fff;transition:var(--transition)}
.not-found .btn:hover{background:var(--primary-dark);transform:translateY(-3px);box-shadow:0 8px 24px rgba(229,25,55,0.3)}

/* Related */
.related-section{background:var(--bg);padding:60px 0;border-top:1px solid var(--border)}
.related-section .section-title{text-align:center;margin-bottom:40px}
.related-section .section-title h3{font-size:1.8rem;font-weight:800;color:var(--secondary);letter-spacing:-0.3px}
.related-section .section-title p{color:var(--text-light);margin-top:8px;font-size:1rem}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{background:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:var(--transition);border:1px solid var(--border)}
.related-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.related-card .card-img{width:100%;height:180px;object-fit:cover;background:var(--border);display:block}
.related-card .card-body{padding:20px 24px 24px}
.related-card .card-body .card-cat{display:inline-block;background:rgba(229,25,55,0.08);color:var(--primary);padding:2px 12px;border-radius:20px;font-size:0.7rem;font-weight:700;margin-bottom:10px;letter-spacing:0.3px}
.related-card .card-body h4{font-size:1.05rem;font-weight:700;color:var(--secondary);line-height:1.4;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-body .card-excerpt{font-size:0.9rem;color:var(--text-light);line-height:1.5;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card .card-body .card-meta{display:flex;align-items:center;gap:16px;font-size:0.8rem;color:var(--text-light)}
.related-card .card-body .card-meta i{color:var(--primary);opacity:0.6;margin-right:4px}
@media(max-width:900px){.related-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.related-grid{grid-template-columns:1fr}.related-section{padding:40px 0}}

/* CTA */
.cta-section{background:linear-gradient(135deg,var(--secondary) 0%,var(--secondary-light) 100%);padding:64px 0;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:0.06;z-index:0}
.cta-section .container{position:relative;z-index:1;text-align:center}
.cta-section h3{font-size:2rem;font-weight:800;color:var(--text-white);margin-bottom:12px;letter-spacing:-0.3px}
.cta-section p{color:rgba(255,255,255,0.8);font-size:1.05rem;max-width:640px;margin:0 auto 28px}
.cta-section .cta-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.cta-section .btn-primary{display:inline-flex;align-items:center;gap:8px;padding:16px 36px;border-radius:var(--radius-sm);font-weight:700;font-size:1rem;background:var(--primary);color:#fff;transition:var(--transition)}
.cta-section .btn-primary:hover{background:var(--primary-light);transform:translateY(-3px);box-shadow:0 8px 24px rgba(229,25,55,0.35)}
.cta-section .btn-outline{display:inline-flex;align-items:center;gap:8px;padding:16px 36px;border-radius:var(--radius-sm);font-weight:700;font-size:1rem;background:transparent;color:#fff;border:2px solid rgba(255,255,255,0.3);transition:var(--transition)}
.cta-section .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:#fff;transform:translateY(-3px)}
@media(max-width:768px){.cta-section{padding:48px 0}.cta-section h3{font-size:1.5rem}}

/* Footer */
.footer{background:var(--secondary);color:rgba(255,255,255,0.8);padding:56px 0 0;border-top:4px solid var(--primary)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-brand .logo{color:var(--text-white);margin-bottom:16px}
.footer-brand .logo i{color:var(--primary)}.footer-brand .logo span{-webkit-text-fill-color:#fff;background:none}
.footer-brand p{font-size:0.92rem;line-height:1.7;color:rgba(255,255,255,0.6);max-width:360px}
.footer h5{font-size:1rem;font-weight:700;color:var(--text-white);margin-bottom:16px;letter-spacing:0.3px}
.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:flex;align-items:center;gap:8px}
.footer-links a i{font-size:0.75rem;color:var(--primary);opacity:0.7}
.footer-links a:hover{color:var(--text-white);transform:translateX(4px)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding:20px 0;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(--text-white)}
@media(max-width:900px){.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;text-align:center}}

/* Utility */
.empty-state{text-align:center;padding:40px 20px;color:var(--text-light)}
.empty-state i{font-size:2.4rem;color:var(--border);margin-bottom:12px}
.empty-state p{font-size:0.95rem}