/* roulang page: index */
:root {
  --primary: #1e3a8a;
  --primary-dark: #1e2d6d;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fef3c7;
  --cta: #ef4444;
  --cta-dark: #dc2626;
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #f1f5f9;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
  --shadow-accent: 0 4px 20px rgba(245,158,11,0.35);
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --max-width: 1200px;
  --header-top-height: 40px;
  --nav-height: 72px;
}
*,*::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:color var(--transition)}
a:hover{color:var(--accent-dark)}
img{max-width:100%;height:auto;display:block}
button,input,textarea{font-family:inherit;font-size:inherit}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--bg-dark);color:var(--text-white)}
.section-title{font-size:2rem;font-weight:800;text-align:center;margin-bottom:12px;color:var(--text)}
.section-subtitle{font-size:1.05rem;text-align:center;color:var(--text-light);margin-bottom:48px;max-width:640px;margin-left:auto;margin-right:auto}
.section-dark .section-title{color:#fff}
.section-dark .section-subtitle{color:#94a3b8}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:var(--radius-sm);font-weight:600;font-size:1rem;border:none;cursor:pointer;transition:all var(--transition);text-decoration:none;line-height:1.2}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(30,58,138,0.3)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(30,58,138,0.4)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:var(--shadow-accent)}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 28px rgba(245,158,11,0.45)}
.btn-cta{background:var(--cta);color:#fff;box-shadow:0 4px 14px rgba(239,68,68,0.3);font-size:1.1rem;padding:16px 40px}
.btn-cta:hover{background:var(--cta-dark);color:#fff;transform:translateY(-2px);box-shadow:0 8px 28px rgba(239,68,68,0.4)}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.btn-white{background:#fff;color:var(--primary);box-shadow:0 4px 14px rgba(0,0,0,0.1)}
.btn-white:hover{background:var(--bg-alt);transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,0.15)}
.badge{display:inline-block;padding:4px 14px;border-radius:50px;font-size:0.78rem;font-weight:600;background:var(--primary-light);color:var(--primary)}
.badge-accent{background:var(--accent-light);color:var(--accent-dark)}
.badge-hot{background:#fee2e2;color:#dc2626}
.tag{display:inline-block;padding:6px 16px;border-radius:50px;font-size:0.85rem;font-weight:500;background:var(--bg-alt);color:var(--text-light);border:1px solid var(--border);transition:all var(--transition)}
.tag:hover{background:var(--primary-light);color:var(--primary);border-color:var(--primary)}
.card{background:var(--bg);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;transition:all var(--transition)}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card-img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block}
.card-body{padding:24px}
.card-title{font-size:1.15rem;font-weight:700;margin-bottom:8px;color:var(--text)}
.card-text{font-size:0.95rem;color:var(--text-light);line-height:1.6}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:32px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.flex-center{display:flex;align-items:center;justify-content:center}
.flex-between{display:flex;align-items:center;justify-content:space-between}
.text-center{text-align:center}
/* ===== Header Top Bar ===== */
.header-top{background:var(--bg-dark);height:var(--header-top-height);display:flex;align-items:center;border-bottom:1px solid rgba(255,255,255,0.06)}
.header-top .container{display:flex;align-items:center;justify-content:space-between}
.header-top-left{display:flex;align-items:center;gap:12px;color:#94a3b8;font-size:0.82rem}
.header-top-left i{color:var(--accent)}
.header-top-right{display:flex;align-items:center;gap:16px;font-size:0.82rem}
.header-top-right a{color:#94a3b8;transition:color var(--transition)}
.header-top-right a:hover{color:var(--accent)}
/* ===== Main Navigation ===== */
.main-nav{background:var(--bg);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:1000;height:var(--nav-height);box-shadow:0 2px 12px rgba(0,0,0,0.04)}
.main-nav .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:800;color:var(--primary);text-decoration:none}
.logo:hover{color:var(--primary)}
.logo-icon{width:38px;height:38px;background:var(--primary);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;font-weight:900}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{padding:8px 18px;border-radius:var(--radius-sm);font-size:0.95rem;font-weight:500;color:var(--text);text-decoration:none;transition:all var(--transition);position:relative}
.nav-links a:hover{color:var(--primary);background:var(--primary-light)}
.nav-links a.active{color:var(--primary);background:var(--primary-light);font-weight:700}
.nav-links a.active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--accent);border-radius:4px}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-search{display:flex;align-items:center;background:var(--bg-alt);border:1px solid var(--border);border-radius:50px;padding:0 16px;height:40px;transition:all var(--transition)}
.nav-search:focus-within{border-color:var(--primary);box-shadow:0 0 0 3px rgba(30,58,138,0.1)}
.nav-search input{border:none;background:transparent;outline:none;padding:8px 0;width:160px;font-size:0.9rem;color:var(--text)}
.nav-search input::placeholder{color:var(--text-light)}
.nav-search button{border:none;background:transparent;color:var(--text-light);cursor:pointer;padding:4px;font-size:0.95rem}
.nav-toggle{display:none;background:none;border:none;font-size:1.6rem;color:var(--text);cursor:pointer;padding:4px}
/* ===== Hero ===== */
.hero{position:relative;min-height:620px;display:flex;align-items:center;overflow:hidden;background:var(--bg-dark)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center center/cover no-repeat;opacity:0.5;z-index:0}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,23,42,0.88) 30%,rgba(30,58,138,0.5) 70%,rgba(15,23,42,0.7) 100%)}
.hero .container{position:relative;z-index:1;text-align:center;padding:100px 24px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(245,158,11,0.2);color:var(--accent);padding:8px 20px;border-radius:50px;font-size:0.9rem;font-weight:600;margin-bottom:24px;border:1px solid rgba(245,158,11,0.3)}
.hero-badge i{font-size:0.85rem}
.hero h1{font-size:3.2rem;font-weight:900;color:#fff;line-height:1.2;margin-bottom:20px;letter-spacing:-0.02em}
.hero h1 span{color:var(--accent)}
.hero p{font-size:1.15rem;color:#cbd5e1;max-width:620px;margin:0 auto 36px;line-height:1.7}
.hero-actions{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;justify-content:center;gap:48px;margin-top:52px;padding-top:40px;border-top:1px solid rgba(255,255,255,0.1)}
.hero-stat{text-align:center}
.hero-stat-num{font-size:2.2rem;font-weight:900;color:#fff;display:block}
.hero-stat-label{font-size:0.9rem;color:#94a3b8;margin-top:4px}
/* ===== Features ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:var(--bg);border-radius:var(--radius);padding:36px 28px;box-shadow:var(--shadow);text-align:center;transition:all var(--transition);border:1px solid var(--border)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.feature-icon{width:64px;height:64px;border-radius:16px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:1.8rem;margin:0 auto 20px;transition:all var(--transition)}
.feature-card:hover .feature-icon{background:var(--primary);color:#fff}
.feature-card h3{font-size:1.2rem;font-weight:700;margin-bottom:10px;color:var(--text)}
.feature-card p{font-size:0.95rem;color:var(--text-light);line-height:1.6}
/* ===== Category Section ===== */
.category-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.category-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:260px;display:flex;align-items:flex-end;background:var(--bg-dark);text-decoration:none;color:#fff;transition:all var(--transition)}
.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);color:#fff}
.category-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0.45;transition:all var(--transition)}
.category-card:hover img{opacity:0.3;transform:scale(1.05)}
.category-card-overlay{position:relative;z-index:1;padding:32px 28px;background:linear-gradient(transparent,rgba(0,0,0,0.85));width:100%}
.category-card h3{font-size:1.4rem;font-weight:800;margin-bottom:6px}
.category-card p{font-size:0.95rem;color:#cbd5e1;opacity:0.9}
.category-card .badge{margin-bottom:12px;background:rgba(245,158,11,0.25);color:var(--accent);border:1px solid rgba(245,158,11,0.3)}
/* ===== Latest Posts ===== */
.post-list{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.post-card{display:flex;gap:20px;background:var(--bg);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:all var(--transition);border:1px solid var(--border)}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.post-card-img{width:140px;min-height:100px;border-radius:var(--radius-sm);object-fit:cover;flex-shrink:0}
.post-card-body{flex:1;min-width:0}
.post-card-category{font-size:0.78rem;font-weight:600;color:var(--accent-dark);background:var(--accent-light);display:inline-block;padding:2px 12px;border-radius:50px;margin-bottom:6px}
.post-card-title{font-size:1rem;font-weight:700;color:var(--text);margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card-title a{color:var(--text);text-decoration:none}
.post-card-title a:hover{color:var(--primary)}
.post-card-excerpt{font-size:0.88rem;color:var(--text-light);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:8px}
.post-card-meta{font-size:0.8rem;color:var(--text-light);display:flex;align-items:center;gap:12px}
.post-card-meta i{margin-right:2px;font-size:0.75rem}
.empty-msg{padding:40px;text-align:center;color:var(--text-light);font-size:1rem;grid-column:1/-1;background:var(--bg-alt);border-radius:var(--radius)}
/* ===== Process Steps ===== */
.process-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative}
.process-step{text-align:center;position:relative}
.process-step-num{width:52px;height:52px;border-radius:50%;background:var(--primary);color:#fff;font-size:1.3rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;position:relative;z-index:1;box-shadow:0 4px 16px rgba(30,58,138,0.3)}
.process-step h4{font-size:1.05rem;font-weight:700;margin-bottom:6px;color:var(--text)}
.process-step p{font-size:0.9rem;color:var(--text-light);line-height:1.5}
.process-connector{position:absolute;top:26px;left:calc(50% + 30px);right:calc(-50% + 30px);height:3px;background:var(--border);z-index:0}
.process-step:last-child .process-connector{display:none}
/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all var(--transition)}
.faq-item:hover{border-color:var(--primary-light)}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:20px 24px;cursor:pointer;font-weight:600;font-size:1rem;color:var(--text);background:var(--bg);transition:all var(--transition);border:none;width:100%;text-align:left;gap:16px}
.faq-question:hover{background:var(--bg-alt)}
.faq-question i{color:var(--primary);transition:transform var(--transition);font-size:1rem;flex-shrink:0}
.faq-item.active .faq-question i{transform:rotate(180deg)}
.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:all 0.4s ease;background:var(--bg-alt)}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 20px}
.faq-answer p{font-size:0.95rem;color:var(--text-light);line-height:1.7}
/* ===== CTA ===== */
.cta-section{background:var(--bg-dark);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:0.2}
.cta-content{position:relative;z-index:1;text-align:center;padding:80px 24px}
.cta-content h2{font-size:2.2rem;font-weight:800;color:#fff;margin-bottom:16px}
.cta-content p{font-size:1.05rem;color:#94a3b8;max-width:560px;margin:0 auto 32px}
.cta-actions{display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap}
/* ===== Footer ===== */
.footer{background:var(--bg-dark);border-top:1px solid rgba(255,255,255,0.06);color:#94a3b8;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:36px}
.footer-brand .logo{color:#fff;margin-bottom:12px}
.footer-brand p{font-size:0.9rem;line-height:1.7;color:#94a3b8;max-width:300px}
.footer h4{color:#fff;font-size:0.95rem;font-weight:700;margin-bottom:16px}
.footer ul li{margin-bottom:10px}
.footer ul a{color:#94a3b8;font-size:0.9rem;transition:color var(--transition)}
.footer ul a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,0.06);padding-top:20px;display:flex;align-items:center;justify-content:space-between;font-size:0.85rem;color:#64748b;flex-wrap:wrap;gap:12px}
.footer-bottom a{color:#94a3b8}
.footer-bottom a:hover{color:var(--accent)}
/* ===== Mobile Responsive ===== */
@media(max-width:1024px){
  .hero h1{font-size:2.6rem}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr);gap:32px}
  .process-connector{display:none}
  .footer-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media(max-width:768px){
  .section{padding:56px 0}
  .section-title{font-size:1.6rem}
  .hero{min-height:480px}
  .hero h1{font-size:2rem}
  .hero p{font-size:1rem}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .hero-stat-num{font-size:1.6rem}
  .features-grid{grid-template-columns:1fr;gap:20px}
  .category-cards{grid-template-columns:1fr;gap:20px}
  .post-list{grid-template-columns:1fr;gap:20px}
  .post-card{flex-direction:column}
  .post-card-img{width:100%;height:160px}
  .grid-2{grid-template-columns:1fr;gap:24px}
  .grid-3{grid-template-columns:1fr;gap:24px}
  .grid-4{grid-template-columns:1fr;gap:20px}
  .process-steps{grid-template-columns:1fr 1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .nav-links{display:none;position:absolute;top:var(--nav-height);left:0;right:0;background:var(--bg);flex-direction:column;padding:16px;border-bottom:1px solid var(--border);box-shadow:var(--shadow)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px;width:100%}
  .nav-search{display:none}
  .nav-toggle{display:block}
  .header-top-left span{display:none}
  .cta-content h2{font-size:1.6rem}
  .cta-content{padding:56px 24px}
  .faq-question{font-size:0.95rem;padding:16px 20px}
}
@media(max-width:520px){
  .hero h1{font-size:1.6rem}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .hero-stats{flex-direction:column;gap:16px}
  .process-steps{grid-template-columns:1fr}
  .cta-actions{flex-direction:column;width:100%}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: article */
/* ===== :root 设计变量 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --primary-bg: #eff6ff;
  --secondary: #f59e0b;
  --secondary-dark: #d97706;
  --accent: #8b5cf6;
  --success: #10b981;
  --danger: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --text: #1f2937;
  --text-light: #6b7280;
  --text-white: #ffffff;
  --bg: #ffffff;
  --bg-alt: #f9fafb;
  --bg-dark: #0f172a;
  --border: #e5e7eb;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --max-width: 1200px;
  --header-height: 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;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--gray-900); font-weight: 700; }
h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }
p { margin-bottom: 1rem; color: var(--text); }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 2rem; margin-bottom: 12px; position: relative; display: inline-block; }
.section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--primary); border-radius: 2px; margin: 12px auto 0; }
.section-title p { font-size: 1.0625rem; color: var(--text-light); max-width: 640px; margin: 0 auto; }

/* ===== Header / Nav ===== */
header { position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,0.97); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.top-bar { background: var(--bg-dark); padding: 6px 0; font-size: 0.8125rem; color: rgba(255,255,255,0.75); }
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: rgba(255,255,255,0.85); margin-left: 16px; }
.top-bar a:hover { color: #fff; }
.top-bar .domain-badge { font-weight: 600; color: var(--secondary); }
.main-nav { padding: 0; height: var(--header-height); }
.main-nav .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 1.25rem; font-weight: 800; color: var(--gray-900); text-decoration: none; }
.logo:hover { color: var(--primary); }
.logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--primary); color: #fff; border-radius: 8px; font-size: 1.1rem; font-weight: 800; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 8px 18px; border-radius: var(--radius-sm); font-size: 0.9375rem; font-weight: 500; color: var(--gray-600); transition: var(--transition); position: relative; }
.nav-links a:hover { color: var(--primary); background: var(--primary-bg); }
.nav-links a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
.nav-links a.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--primary); border-radius: 2px; }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; background: var(--gray-100); border-radius: 20px; padding: 0 4px 0 14px; border: 1px solid transparent; transition: var(--transition); }
.nav-search:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.nav-search input { border: none; background: transparent; padding: 8px 0; font-size: 0.875rem; width: 140px; outline: none; color: var(--text); }
.nav-search input::placeholder { color: var(--gray-400); }
.nav-search button { background: transparent; border: none; padding: 6px 10px; color: var(--gray-400); border-radius: 50%; transition: var(--transition); }
.nav-search button:hover { color: var(--primary); }
.nav-toggle { display: none; background: transparent; border: none; font-size: 1.3rem; color: var(--gray-700); padding: 6px; border-radius: 6px; }
.nav-toggle:hover { background: var(--gray-100); }

/* ===== Mobile Nav ===== */
@media (max-width: 868px) {
  .nav-links { position: fixed; top: var(--header-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); flex-direction: column; padding: 16px 20px; gap: 4px; border-bottom: 1px solid var(--border); transform: translateY(-110%); opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: var(--shadow-lg); z-index: 999; }
  .nav-links.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-links a { width: 100%; padding: 12px 16px; font-size: 1rem; }
  .nav-toggle { display: block; }
  .nav-search input { width: 100px; }
  .top-bar .domain-badge { font-size: 0.75rem; }
  .top-bar a { font-size: 0.75rem; margin-left: 10px; }
}

/* ===== Article Banner ===== */
.article-banner {
  position: relative;
  padding: 80px 0 60px;
  background: var(--bg-dark);
  overflow: hidden;
  min-height: 340px;
  display: flex;
  align-items: center;
}
.article-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.2;
  z-index: 0;
}
.article-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(30,41,59,0.85) 100%);
  z-index: 1;
}
.article-banner .container { position: relative; z-index: 2; }
.article-banner .breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 0.875rem; color: rgba(255,255,255,0.6); margin-bottom: 20px; }
.article-banner .breadcrumb a { color: rgba(255,255,255,0.7); }
.article-banner .breadcrumb a:hover { color: #fff; }
.article-banner .breadcrumb span { color: rgba(255,255,255,0.4); }
.article-banner h1 { font-size: 2.25rem; font-weight: 800; color: #fff; max-width: 800px; line-height: 1.3; margin-bottom: 16px; }
.article-banner .meta { display: flex; flex-wrap: wrap; gap: 16px; color: rgba(255,255,255,0.65); font-size: 0.875rem; }
.article-banner .meta span { display: flex; align-items: center; gap: 6px; }
.article-banner .meta i { color: var(--secondary); }
.article-banner .category-tag { display: inline-block; padding: 4px 14px; background: var(--primary); color: #fff; border-radius: 20px; font-size: 0.8125rem; font-weight: 500; }

/* ===== Article Content ===== */
.article-main { padding: 60px 0 80px; }
.article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; }
.article-body { min-width: 0; }
.article-body .featured-image { border-radius: var(--radius); overflow: hidden; margin-bottom: 32px; box-shadow: var(--shadow-md); }
.article-body .featured-image img { width: 100%; height: auto; max-height: 480px; object-fit: cover; }
.article-body .content { font-size: 1.0625rem; line-height: 1.8; color: var(--text); }
.article-body .content p { margin-bottom: 1.25rem; }
.article-body .content h2 { font-size: 1.5rem; margin-top: 2rem; margin-bottom: 1rem; padding-bottom: 8px; border-bottom: 2px solid var(--border); }
.article-body .content h3 { font-size: 1.25rem; margin-top: 1.5rem; margin-bottom: 0.75rem; }
.article-body .content ul, .article-body .content ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
.article-body .content ul { list-style: disc; }
.article-body .content ol { list-style: decimal; }
.article-body .content li { margin-bottom: 0.5rem; }
.article-body .content blockquote { border-left: 4px solid var(--primary); background: var(--primary-bg); padding: 16px 20px; margin: 1.25rem 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.article-body .content blockquote p { margin-bottom: 0; }
.article-body .content code { background: var(--gray-100); padding: 2px 8px; border-radius: 4px; font-size: 0.875rem; }
.article-body .content pre { background: var(--gray-900); color: #e5e7eb; padding: 20px; border-radius: var(--radius-sm); overflow-x: auto; margin-bottom: 1.25rem; font-size: 0.875rem; line-height: 1.6; }
.article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body .content a:hover { color: var(--primary-dark); }
.article-body .content img { border-radius: var(--radius-sm); margin: 1.5rem 0; box-shadow: var(--shadow); }

/* ===== Article Sidebar ===== */
.article-sidebar { position: sticky; top: calc(var(--header-height) + 24px); align-self: start; }
.sidebar-card { background: var(--bg-alt); border-radius: var(--radius); padding: 28px; margin-bottom: 24px; border: 1px solid var(--border); }
.sidebar-card h3 { font-size: 1.1rem; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--primary); display: flex; align-items: center; gap: 8px; }
.sidebar-card h3 i { color: var(--primary); }
.sidebar-card ul li { padding: 10px 0; border-bottom: 1px solid var(--border); }
.sidebar-card ul li:last-child { border-bottom: none; }
.sidebar-card ul li a { display: flex; align-items: center; gap: 10px; font-size: 0.9375rem; color: var(--gray-700); }
.sidebar-card ul li a:hover { color: var(--primary); transform: translateX(4px); }
.sidebar-card ul li a i { color: var(--primary); font-size: 0.75rem; }
.sidebar-cta { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; border: none; }
.sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
.sidebar-cta h3 i { color: var(--secondary); }
.sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9375rem; margin-bottom: 20px; }
.sidebar-cta .btn { width: 100%; background: #fff; color: var(--primary); font-weight: 600; padding: 12px; border-radius: var(--radius-sm); text-align: center; display: block; }
.sidebar-cta .btn:hover { background: var(--secondary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* ===== Not Found ===== */
.not-found { text-align: center; padding: 100px 0; }
.not-found i { font-size: 4rem; color: var(--gray-300); margin-bottom: 24px; }
.not-found h2 { font-size: 1.75rem; margin-bottom: 12px; }
.not-found p { color: var(--text-light); margin-bottom: 24px; }
.not-found .btn { display: inline-block; padding: 12px 32px; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-size: 0.9375rem; font-weight: 600; border: none; transition: var(--transition); cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-secondary:hover { background: var(--secondary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-lg { padding: 16px 40px; font-size: 1.0625rem; border-radius: var(--radius); }
.btn-sm { padding: 8px 18px; font-size: 0.8125rem; }
.btn-block { width: 100%; justify-content: center; }

/* ===== Related Posts ===== */
.related-section { background: var(--bg-alt); padding: 60px 0; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border); }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.related-card .card-img { height: 180px; overflow: hidden; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body { padding: 20px; }
.related-card .card-body h4 { font-size: 1rem; margin-bottom: 8px; }
.related-card .card-body h4 a { color: var(--gray-900); }
.related-card .card-body h4 a:hover { color: var(--primary); }
.related-card .card-body p { font-size: 0.875rem; color: var(--text-light); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-body .meta { font-size: 0.8125rem; color: var(--gray-400); display: flex; gap: 12px; }

/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.75); padding: 60px 0 0; }
.footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand .logo { color: #fff; font-size: 1.25rem; margin-bottom: 16px; }
.footer-brand .logo .logo-icon { background: var(--primary); }
.footer-brand p { font-size: 0.9375rem; color: rgba(255,255,255,0.6); max-width: 360px; line-height: 1.7; }
.footer h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--primary); }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: rgba(255,255,255,0.6); font-size: 0.9375rem; display: flex; align-items: center; gap: 8px; }
.footer ul li a:hover { color: #fff; transform: translateX(4px); }
.footer ul li a i { width: 16px; color: var(--primary); }
.footer-bottom { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.875rem; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .article-banner h1 { font-size: 1.75rem; }
}

@media (max-width: 768px) {
  .section { padding: 48px 0; }
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.375rem; }
  .article-banner { padding: 48px 0 36px; min-height: 240px; }
  .article-banner h1 { font-size: 1.375rem; }
  .article-banner .meta { flex-wrap: wrap; gap: 10px; font-size: 0.8125rem; }
  .article-main { padding: 32px 0 48px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .nav-search input { width: 80px; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-banner h1 { font-size: 1.2rem; }
  .article-body .content { font-size: 1rem; }
  .sidebar-card { padding: 20px; }
  .top-bar .container { flex-direction: column; gap: 4px; }
  .top-bar .right { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
  .nav-search input { width: 70px; }
  .btn-lg { padding: 14px 28px; font-size: 0.9375rem; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --secondary: #f39c12;
            --secondary-light: #fef5e7;
            --accent: #2ecc71;
            --accent-dark: #27ae60;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.15);
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --transition: 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-height: 72px;
            --topbar-height: 40px;
        }

        /* ===== 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;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }

        .section-padding {
            padding: 80px 0;
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--primary-light);
            color: var(--primary-dark);
            margin-bottom: 16px;
        }

        .badge-secondary {
            background: var(--secondary-light);
            color: var(--secondary);
        }

        .badge-accent {
            background: #d5f5e3;
            color: var(--accent-dark);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 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);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(231, 76, 60, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }

        .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(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        .btn-lg {
            padding: 16px 44px;
            font-size: 1.1rem;
        }

        .text-center {
            text-align: center;
        }

        /* ===== Top Bar ===== */
        .topbar {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.85rem;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        .topbar-info {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .topbar-info span {
            display: flex;
            align-items: center;
            gap: 6px;
            opacity: 0.9;
        }

        .topbar-info i {
            color: var(--secondary);
            font-size: 0.75rem;
        }

        .topbar-cta a {
            color: var(--secondary);
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 12px;
            background: rgba(243, 156, 18, 0.15);
            transition: background var(--transition);
        }
        .topbar-cta a:hover {
            background: rgba(243, 156, 18, 0.25);
            color: var(--secondary);
        }

        /* ===== Main Nav ===== */
        .main-nav {
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--text);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }

        .nav-links a {
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 500;
            color: var(--text);
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 50px;
            padding: 0 4px 0 16px;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.12);
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text);
            width: 140px;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }
        .nav-search button {
            padding: 8px 14px;
            color: var(--text-light);
            border-radius: 50px;
            transition: color var(--transition);
        }
        .nav-search button:hover {
            color: var(--primary);
        }

        .nav-toggle {
            display: none;
            font-size: 1.4rem;
            color: var(--text);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center/cover no-repeat;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.88) 0%, rgba(15, 52, 96, 0.8) 100%);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-banner .badge {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .page-banner h1 {
            font-size: 3rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -1px;
            line-height: 1.2;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }

        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .page-banner .banner-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 24px;
        }

        .page-banner .banner-stats .stat-item {
            text-align: center;
            color: #fff;
        }

        .page-banner .banner-stats .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
            display: block;
        }

        .page-banner .banner-stats .stat-label {
            font-size: 0.85rem;
            opacity: 0.75;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 600;
        }

        /* ===== Guide Intro ===== */
        .guide-intro {
            background: #fff;
        }

        .guide-intro .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .guide-intro .intro-content h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .guide-intro .intro-content p {
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.8;
        }

        .guide-intro .intro-content .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 20px;
        }

        .guide-intro .intro-content .intro-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
            font-size: 0.95rem;
        }

        .guide-intro .intro-content .intro-features li i {
            color: var(--accent);
            font-size: 1rem;
            width: 20px;
        }

        .guide-intro .intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            background: var(--bg);
        }

        .guide-intro .intro-image img {
            width: 100%;
            height: 360px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-intro .intro-image:hover img {
            transform: scale(1.03);
        }

        /* ===== Steps ===== */
        .steps-section {
            background: var(--bg);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 16px;
        }

        .step-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }

        .step-card .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 16px;
            transition: all var(--transition);
        }
        .step-card:hover .step-num {
            background: var(--primary);
            color: #fff;
            transform: scale(1.1);
        }

        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        .step-card .step-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
            display: block;
        }
        .step-card:hover .step-icon {
            animation: pulse-icon 0.6s ease;
        }

        @keyframes pulse-icon {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.15);
            }
        }

        /* ===== Registration Methods ===== */
        .methods-section {
            background: #fff;
        }

        .methods-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .method-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .method-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .method-card:hover::before {
            transform: scaleX(1);
        }
        .method-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: transparent;
        }

        .method-card .method-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }

        .method-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .method-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .method-card .method-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .method-card .method-tag.accent {
            background: #d5f5e3;
            color: var(--accent-dark);
        }

        .method-card .method-tag.secondary {
            background: var(--secondary-light);
            color: #d68910;
        }

        /* ===== Tips & Notes ===== */
        .tips-section {
            background: var(--bg);
        }

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

        .tip-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 32px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .tip-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .tip-card .tip-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
        }

        .tip-card .tip-icon.warn {
            background: var(--secondary);
        }
        .tip-card .tip-icon.info {
            background: #3498db;
        }
        .tip-card .tip-icon.success {
            background: var(--accent);
        }
        .tip-card .tip-icon.danger {
            background: var(--primary);
        }

        .tip-card h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .tip-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            background: var(--bg);
            transition: background var(--transition);
            text-align: left;
            gap: 16px;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.35s ease;
            background: #fff;
        }
        .faq-item.active .faq-answer {
            padding: 18px 24px 24px;
            max-height: 400px;
        }
        .faq-answer p {
            color: var(--text-light);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center/cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        .cta-section .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer (共用) ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 64px 0 0;
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .footer .footer-brand .logo .logo-icon {
            background: var(--primary);
        }
        .footer .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            opacity: 0.7;
            max-width: 360px;
        }

        .footer h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

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

        .footer ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.9rem;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer ul li a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer ul li a i {
            font-size: 0.8rem;
            width: 16px;
        }

        .footer .footer-bottom {
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            opacity: 0.6;
            color: rgba(255, 255, 255, 0.7);
        }

        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .footer .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .methods-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .guide-intro .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .guide-intro .intro-image img {
                height: 280px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }

            .topbar {
                font-size: 0.78rem;
            }
            .topbar-info span:not(:first-child) {
                display: none;
            }

            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                gap: 6px;
                box-shadow: var(--shadow);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                z-index: 999;
                border-bottom: 3px solid var(--primary);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
                font-size: 1rem;
            }

            .nav-search input {
                width: 100px;
            }

            .nav-toggle {
                display: block;
            }

            .page-banner {
                padding: 60px 0 50px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .page-banner .banner-stats {
                gap: 20px;
            }
            .page-banner .banner-stats .stat-num {
                font-size: 1.4rem;
            }

            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
            .section-padding {
                padding: 50px 0;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 24px 18px;
            }

            .methods-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .tips-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 1rem;
            }

            .guide-intro .intro-content .intro-features {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-banner h1 {
                font-size: 1.6rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card .step-num {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .btn-lg {
                padding: 12px 28px;
                font-size: 1rem;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.active .faq-answer {
                padding: 14px 16px 18px;
            }

            .tip-card {
                flex-direction: column;
                padding: 20px;
                gap: 12px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Selection ===== */
        ::selection {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Additional spacing & polish ===== */
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }

        /* ===== Smooth fade on load ===== */
        .fade-in {
            animation: fadeInUp 0.6s ease forwards;
            opacity: 0;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-d1 {
            animation-delay: 0.1s;
        }
        .fade-in-d2 {
            animation-delay: 0.2s;
        }
        .fade-in-d3 {
            animation-delay: 0.3s;
        }
        .fade-in-d4 {
            animation-delay: 0.4s;
        }