/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1a4c8a;
  --primary-light: #2a6cb8;
  --primary-dark: #0f3460;
  --primary-bg: #e8f0fe;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --accent-dark: #d97706;
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --bg-light: #f1f5f9;
  --bg-dark: #0f172a;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --container-w: 1200px;
  --nav-h: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }
p { margin-bottom: 1em; color: var(--text-secondary); }
p:last-child { margin-bottom: 0; }

/* ===== 容器 ===== */
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* ===== 浮动Dock导航 ===== */
.site-header {
  position: fixed; top: 16px; left: 0; right: 0; z-index: 1000;
  display: flex; justify-content: center; pointer-events: none;
}
.nav-dock {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.7);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-xl);
  padding: 8px 24px;
  pointer-events: auto;
  max-width: 92vw;
  transition: box-shadow var(--transition);
}
.nav-dock:hover { box-shadow: var(--shadow-lg); }
.nav-logo {
  font-size: 1.3rem; font-weight: 800; color: var(--primary-dark);
  letter-spacing: -0.02em; padding: 4px 12px 4px 4px;
  border-right: 1.5px solid var(--border);
  margin-right: 4px; white-space: nowrap;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  display: block; padding: 8px 16px; border-radius: var(--radius-lg);
  font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
  transition: all var(--transition); white-space: nowrap;
  position: relative;
}
.nav-links a:hover { color: var(--primary); background: var(--primary-bg); }
.nav-links a.active { color: var(--primary-dark); background: var(--primary-bg); font-weight: 600; }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%);
  width: 18px; height: 3px; background: var(--primary); border-radius: 4px;
}
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: 8px; }
.nav-search {
  display: flex; align-items: center; background: var(--bg-light);
  border-radius: var(--radius-lg); padding: 0 14px; gap: 6px;
  border: 1px solid transparent; transition: all var(--transition);
}
.nav-search:focus-within { border-color: var(--primary); background: var(--bg-white); box-shadow: 0 0 0 3px rgba(26,76,138,0.1); }
.nav-search i { color: var(--text-muted); font-size: 0.9rem; }
.nav-search input {
  border: none; background: transparent; padding: 8px 0; font-size: 0.85rem;
  color: var(--text-primary); width: 100px; outline: none;
}
.nav-search input::placeholder { color: var(--text-muted); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary); color: var(--text-white) !important;
  padding: 8px 20px; border-radius: var(--radius-lg); font-size: 0.85rem;
  font-weight: 600; transition: all var(--transition);
}
.nav-cta:hover { background: var(--primary-light); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.nav-toggle { display: none; font-size: 1.3rem; color: var(--text-primary); padding: 8px; border-radius: var(--radius-md); }
.nav-toggle:hover { background: var(--bg-light); }

/* 移动端导航 */
@media (max-width: 820px) {
  .site-header { top: 12px; }
  .nav-dock { padding: 6px 16px; gap: 4px; flex-wrap: wrap; }
  .nav-links { display: none; }
  .nav-links.mobile-open { display: flex; flex-direction: column; width: 100%; padding: 8px 0 4px; gap: 4px; }
  .nav-links a { width: 100%; text-align: center; padding: 10px 12px; }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { background: var(--primary-bg); border-radius: var(--radius-lg); }
  .nav-actions { margin-left: auto; }
  .nav-search { display: none; }
  .nav-search.mobile-open { display: flex; width: 100%; margin-top: 4px; }
  .nav-toggle { display: block; }
  .nav-cta { padding: 6px 14px; font-size: 0.8rem; }
}

@media (max-width: 480px) {
  .nav-dock { padding: 6px 12px; }
  .nav-logo { font-size: 1.1rem; padding-right: 8px; }
}

/* ===== 页面主体 ===== */
.main-content { padding-top: calc(var(--nav-h) + 40px); }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 88vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  overflow: hidden; isolation: isolate;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover; background-position: center; background-repeat: no-repeat;
  opacity: 0.2; mix-blend-mode: overlay;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: radial-gradient(ellipse at 30% 50%, rgba(15,52,96,0.4) 0%, transparent 70%);
}
.hero .container { position: relative; z-index: 2; width: 100%; }
.hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 60px 0; }
.hero-content { max-width: 600px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,0.12); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.18);
  color: var(--text-white); padding: 6px 16px; border-radius: var(--radius-xl);
  font-size: 0.8rem; font-weight: 500; margin-bottom: 20px;
}
.hero-badge i { color: var(--accent-light); }
.hero h1 { color: var(--text-white); margin-bottom: 20px; }
.hero h1 span { color: var(--accent); }
.hero p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 520px; margin-bottom: 32px; line-height: 1.8; }
.hero-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: var(--text-primary) !important;
  padding: 14px 32px; border-radius: var(--radius-lg); font-weight: 600;
  font-size: 0.95rem; transition: all var(--transition);
}
.hero-btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.hero-btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1); color: var(--text-white) !important;
  border: 1px solid rgba(255,255,255,0.25); padding: 14px 28px;
  border-radius: var(--radius-lg); font-weight: 500; font-size: 0.95rem;
  transition: all var(--transition);
}
.hero-btn-secondary:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }
.hero-visual {
  display: flex; justify-content: center; align-items: center;
  position: relative;
}
.hero-card-stack {
  position: relative; width: 100%; max-width: 480px;
  aspect-ratio: 4/3; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.hero-card-stack img {
  width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg);
}
.hero-card-stack .tag {
  position: absolute; top: 16px; left: 16px;
  background: var(--accent); color: var(--text-primary); padding: 4px 14px;
  border-radius: var(--radius-xl); font-size: 0.75rem; font-weight: 600;
}
.hero-stats {
  position: absolute; bottom: 16px; left: 16px; right: 16px;
  display: flex; gap: 12px; flex-wrap: wrap;
}
.hero-stat {
  background: rgba(15,23,42,0.7); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1); padding: 8px 16px;
  border-radius: var(--radius-md); color: var(--text-white);
  font-size: 0.75rem; display: flex; align-items: center; gap: 6px;
}
.hero-stat strong { font-size: 1rem; color: var(--accent-light); }
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; padding: 40px 0; }
  .hero-content { max-width: 100%; }
  .hero p { max-width: 100%; }
  .hero-btns { justify-content: center; }
  .hero-visual { max-width: 480px; margin: 0 auto; }
}
@media (max-width: 640px) {
  .hero { min-height: 70vh; }
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-btn-primary, .hero-btn-secondary { width: 100%; justify-content: center; }
}

/* ===== 通用板块 ===== */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-light); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-dark h2, .section-dark h3 { color: var(--text-white); }
.section-dark p { color: rgba(255,255,255,0.7); }
.section-header { text-align: center; margin-bottom: 48px; max-width: 720px; margin-left: auto; margin-right: auto; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { font-size: 1.05rem; }
.section-badge {
  display: inline-block; background: var(--primary-bg); color: var(--primary);
  padding: 4px 16px; border-radius: var(--radius-xl); font-size: 0.8rem;
  font-weight: 600; margin-bottom: 16px;
}

/* ===== 核心介绍 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.about-image {
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3; position: relative;
}
.about-image img { width: 100%; height: 100%; object-fit: cover; }
.about-image .play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 64px; height: 64px; background: rgba(255,255,255,0.9); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 1.4rem; box-shadow: var(--shadow-lg);
  transition: all var(--transition);
}
.about-image .play-btn:hover { transform: translate(-50%,-50%) scale(1.08); background: var(--text-white); }
.about-text h3 { margin-bottom: 16px; }
.about-text p { margin-bottom: 16px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 24px; }
.about-feat {
  display: flex; align-items: center; gap: 10px; font-size: 0.9rem;
  color: var(--text-secondary); font-weight: 500;
}
.about-feat i { color: var(--primary); width: 20px; text-align: center; }
@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .about-features { grid-template-columns: 1fr; }
}

/* ===== 分类入口 ===== */
.cat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cat-card {
  background: var(--bg-white); border-radius: var(--radius-md); overflow: hidden;
  border: 1px solid var(--border); transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-bg); }
.cat-card-img {
  height: 180px; overflow: hidden; position: relative;
}
.cat-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.cat-card:hover .cat-card-img img { transform: scale(1.05); }
.cat-card-img .cat-tag {
  position: absolute; top: 12px; left: 12px; background: var(--primary);
  color: var(--text-white); padding: 4px 12px; border-radius: var(--radius-sm);
  font-size: 0.7rem; font-weight: 600;
}
.cat-card-body { padding: 20px; }
.cat-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.cat-card-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; }
.cat-card-body .cat-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-muted); }
.cat-card-body .cat-meta i { margin-right: 4px; }
@media (max-width: 820px) { .cat-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .cat-grid { grid-template-columns: 1fr; } }

/* ===== 内容列表 ===== */
.content-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.content-card {
  display: flex; gap: 20px; background: var(--bg-white); border-radius: var(--radius-md);
  padding: 16px; border: 1px solid var(--border); transition: all var(--transition);
  box-shadow: var(--shadow-sm);
}
.content-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--primary-bg); }
.content-card-img {
  width: 100px; height: 100px; border-radius: var(--radius-sm); overflow: hidden; flex-shrink: 0;
}
.content-card-img img { width: 100%; height: 100%; object-fit: cover; }
.content-card-body { flex: 1; min-width: 0; }
.content-card-body .cc-cat {
  display: inline-block; background: var(--primary-bg); color: var(--primary);
  padding: 2px 10px; border-radius: var(--radius-sm); font-size: 0.7rem; font-weight: 600;
  margin-bottom: 6px;
}
.content-card-body h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
.content-card-body h4 a { color: var(--text-primary); }
.content-card-body h4 a:hover { color: var(--primary); }
.content-card-body p { font-size: 0.85rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.content-card-body .cc-meta { display: flex; align-items: center; gap: 12px; font-size: 0.75rem; color: var(--text-muted); margin-top: 8px; }
.content-card-body .cc-meta i { margin-right: 3px; }
.content-empty {
  grid-column: 1 / -1; text-align: center; padding: 40px 20px;
  color: var(--text-muted); font-size: 0.95rem;
}
.content-empty i { font-size: 2rem; margin-bottom: 12px; display: block; color: var(--border); }
@media (max-width: 768px) { .content-grid { grid-template-columns: 1fr; } }
@media (max-width: 480px) {
  .content-card { flex-direction: column; }
  .content-card-img { width: 100%; height: 140px; }
}

/* ===== 流程步骤 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-card {
  background: var(--bg-white); border-radius: var(--radius-md); padding: 32px 20px;
  border: 1px solid var(--border); text-align: center; transition: all var(--transition);
  position: relative; box-shadow: var(--shadow-sm);
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.step-card::before {
  counter-increment: step; content: "0" counter(step);
  position: absolute; top: 12px; right: 16px; font-size: 2.8rem; font-weight: 800;
  color: var(--border); line-height: 1; opacity: 0.5;
}
.step-icon {
  width: 56px; height: 56px; background: var(--primary-bg); color: var(--primary);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin: 0 auto 16px; transition: all var(--transition);
}
.step-card:hover .step-icon { background: var(--primary); color: var(--text-white); }
.step-card h4 { margin-bottom: 8px; font-size: 1rem; }
.step-card p { font-size: 0.85rem; color: var(--text-muted); }
@media (max-width: 820px) { .steps-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .steps-grid { grid-template-columns: 1fr; } }

/* ===== 数据统计 ===== */
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; padding: 32px 16px; }
.stat-num { font-size: 2.8rem; font-weight: 800; color: var(--accent); line-height: 1.1; margin-bottom: 4px; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.7); }
@media (max-width: 640px) { .stats-grid { grid-template-columns: 1fr 1fr; } }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }
.faq-item {
  background: var(--bg-white); border: 1px solid var(--border); border-radius: var(--radius-md);
  overflow: hidden; transition: all var(--transition);
}
.faq-item:hover { border-color: var(--primary-bg); }
.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; cursor: pointer; font-weight: 600; font-size: 0.95rem;
  color: var(--text-primary); transition: all var(--transition);
  user-select: none;
}
.faq-q:hover { color: var(--primary); }
.faq-q i { color: var(--text-muted); transition: transform var(--transition); font-size: 0.85rem; }
.faq-item.active .faq-q i { transform: rotate(180deg); color: var(--primary); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px; color: var(--text-secondary); font-size: 0.9rem;
  line-height: 1.7;
}
.faq-item.active .faq-a { max-height: 300px; padding: 0 24px 18px; }
@media (max-width: 640px) {
  .faq-q { padding: 14px 16px; font-size: 0.9rem; }
  .faq-item.active .faq-a { padding: 0 16px 14px; }
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  position: relative; overflow: hidden; isolation: isolate;
}
.cta-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover; background-position: center; opacity: 0.08;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 1; text-align: center; padding: 80px 24px; }
.cta-section h2 { color: var(--text-white); margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 32px; font-size: 1.05rem; }
.cta-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta-btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent); color: var(--text-primary) !important;
  padding: 14px 36px; border-radius: var(--radius-lg); font-weight: 600;
  font-size: 0.95rem; transition: all var(--transition);
}
.cta-btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.cta-btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1); color: var(--text-white) !important;
  border: 1px solid rgba(255,255,255,0.25); padding: 14px 28px;
  border-radius: var(--radius-lg); font-weight: 500; font-size: 0.95rem;
  transition: all var(--transition);
}
.cta-btn-secondary:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }
@media (max-width: 480px) {
  .cta-btns { flex-direction: column; align-items: center; }
  .cta-btn-primary, .cta-btn-secondary { width: 100%; justify-content: center; }
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 48px 0 24px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.08); margin-bottom: 24px; }
.footer-brand .nav-logo { color: var(--text-white); border: none; margin-bottom: 12px; display: inline-block; font-size: 1.2rem; }
.footer-brand .nav-logo span { color: var(--accent); }
.footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.5); max-width: 300px; line-height: 1.7; }
.footer-col h4 { color: var(--text-white); font-size: 0.9rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a {
  display: block; color: rgba(255,255,255,0.5); font-size: 0.85rem; padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-social { display: flex; gap: 12px; margin-top: 16px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5);
  font-size: 0.9rem; transition: all var(--transition);
}
.footer-social a:hover { background: var(--accent); color: var(--text-primary); }
.footer-bottom { text-align: center; font-size: 0.8rem; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.35); }
.footer-bottom a:hover { color: var(--accent); }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }

/* ===== 通用辅助 ===== */
.text-center { text-align: center; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.gap-8 { gap: 8px; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 40px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html { scroll-behavior: smooth; font-size: 16px; }

        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--secondary); }

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

        .container-narrow {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Dock Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 12px 24px;
            pointer-events: none;
        }

        .nav-dock {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border: 1px solid rgba(255,255,255,0.5);
            box-shadow: 0 8px 32px rgba(0,0,0,0.06);
            border-radius: 60px;
            padding: 8px 20px 8px 28px;
            pointer-events: auto;
            transition: var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 12px 40px rgba(0,0,0,0.09);
            border-color: rgba(255,255,255,0.8);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 2px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--secondary);
            letter-spacing: -0.5px;
        }
        .nav-logo span { color: var(--primary); }
        .nav-logo:hover { opacity: 0.85; }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-light);
            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-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 40px;
            padding: 4px 14px 4px 12px;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
        }
        .nav-search i { color: var(--text-light); font-size: 0.85rem; }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 4px 0;
            width: 100px;
            font-size: 0.88rem;
            color: var(--text);
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search input:focus { width: 140px; }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            padding: 8px 18px;
            font-size: 0.88rem;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37,99,235,0.3);
            color: #fff;
        }
        .nav-cta i { font-size: 0.82rem; }

        .nav-toggle {
            display: none;
            background: transparent;
            font-size: 1.3rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-xs);
        }
        .nav-toggle:hover { background: var(--bg-alt); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .site-header { padding: 8px 12px; }
            .nav-dock { padding: 6px 12px 6px 18px; border-radius: 40px; }
            .nav-links {
                position: fixed;
                top: 72px;
                left: 12px;
                right: 12px;
                background: rgba(255,255,255,0.96);
                backdrop-filter: blur(20px);
                border: 1px solid var(--border);
                border-radius: 20px;
                flex-direction: column;
                gap: 2px;
                padding: 12px;
                box-shadow: var(--shadow-lg);
                display: none;
                z-index: 999;
            }
            .nav-links.open { display: flex; }
            .nav-links a { padding: 10px 16px; width: 100%; border-radius: 12px; }
            .nav-search { display: none; }
            .nav-cta { padding: 6px 14px; font-size: 0.82rem; }
            .nav-cta span { display: none; }
            .nav-toggle { display: block; }
        }

        @media (max-width: 520px) {
            .nav-dock { padding: 6px 10px 6px 14px; }
            .nav-logo { font-size: 1.1rem; }
            .nav-cta { padding: 5px 12px; font-size: 0.78rem; }
        }

        /* ===== Hero / Banner ===== */
        .article-hero {
            padding-top: calc(var(--nav-height) + 40px);
            padding-bottom: 60px;
            background: var(--bg-alt);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .article-hero .container-narrow {
            position: relative;
            z-index: 1;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: var(--primary); }
        .article-hero .breadcrumb a:hover { text-decoration: underline; }
        .article-hero .breadcrumb span { color: var(--text-light); }
        .article-hero .breadcrumb i { font-size: 0.7rem; color: var(--text-light); }

        .article-hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--secondary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.92rem;
            color: var(--text-light);
        }
        .article-hero .meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-hero .meta i { font-size: 0.85rem; }
        .article-hero .meta .category {
            background: var(--primary-bg);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 600;
        }

        /* ===== Article Content ===== */
        .article-content-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .article-content-section .container-narrow {
            max-width: 780px;
        }
        .article-body {
            font-size: 1.08rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body p {
            margin-bottom: 1.5em;
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin-top: 2em;
            margin-bottom: 0.6em;
            color: var(--secondary);
        }
        .article-body h3 {
            font-size: 1.25rem;
            margin-top: 1.6em;
            margin-bottom: 0.5em;
            color: var(--secondary);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.5em;
            padding-left: 1.5em;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.4em; }
        .article-body img {
            margin: 2em auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 2em 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover { color: var(--primary-dark); }

        .article-body .cms-code {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            overflow-x: auto;
            font-family: 'SF Mono', 'Fira Code', monospace;
            font-size: 0.92rem;
            margin: 1.5em 0;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            background: var(--bg-alt);
            color: var(--text-light);
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 0.82rem;
            font-weight: 500;
            border: 1px solid var(--border);
        }
        .article-tags .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-bg);
        }

        .article-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 0;
        }
        .article-nav a:hover { color: var(--primary-dark); gap: 12px; }

        /* ===== Related / More ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .related-card .cat-tag {
            font-size: 0.78rem;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 2px 12px;
            border-radius: 40px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 12px;
        }
        .related-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--secondary);
        }
        .related-card h3 a { color: inherit; }
        .related-card h3 a:hover { color: var(--primary); }
        .related-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .meta-date {
            font-size: 0.82rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .meta-date i { font-size: 0.78rem; }

        /* ===== CTA ===== */
        .cta-section {
            padding: 60px 0;
            background: var(--secondary);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--secondary);
            padding: 14px 36px;
            border-radius: 60px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(245,158,11,0.35);
            background: #fbbf24;
            color: var(--secondary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 30px;
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .nav-logo span { color: var(--primary-light); }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.6;
            color: rgba(255,255,255,0.55);
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary-light); }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-brand p { max-width: 100%; }
        }

        /* ===== Responsive Article ===== */
        @media (max-width: 768px) {
            .article-hero h1 { font-size: 1.7rem; }
            .article-body { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .article-hero { padding-top: calc(var(--nav-height) + 24px); padding-bottom: 40px; }
            .article-content-section { padding: 40px 0; }
            .related-section { padding: 40px 0; }
            .cta-section { padding: 40px 0; }
            .cta-section h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; }
            .article-hero h1 { font-size: 1.4rem; }
            .article-hero .meta { gap: 12px; font-size: 0.82rem; }
            .article-nav { flex-direction: column; align-items: flex-start; }
            .container-narrow { padding: 0 16px; }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37,99,235,0.3);
            color: #fff;
        }

        /* ===== Misc ===== */
        .section-divider { height: 1px; background: var(--border); margin: 0; }
        .text-center { text-align: center; }
        .mt-2 { margin-top: 1rem; }
        .mb-2 { margin-bottom: 1rem; }
        .gap-1 { gap: 0.5rem; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1d4ed8;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --secondary-light: #1e293b;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.12);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --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-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;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

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

        input,
        textarea {
            font: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

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

        /* ===== Site Header / Dock Nav ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            pointer-events: none;
        }

        .nav-dock {
            pointer-events: auto;
            display: flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(14px) saturate(180%);
            -webkit-backdrop-filter: blur(14px) saturate(180%);
            border: 1px solid rgba(226, 232, 240, 0.6);
            border-radius: 60px;
            padding: 8px 20px 8px 24px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            max-width: 900px;
            width: 100%;
            margin: 0 16px;
            transition: box-shadow var(--transition);
        }

        .nav-dock:hover {
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo span {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: nowrap;
        }

        .nav-links a {
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }

        .nav-links a.active {
            color: #ffffff;
            background: var(--primary);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.30);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-alt);
            border-radius: 40px;
            padding: 4px 14px 4px 12px;
            border: 1px solid var(--border);
            transition: border var(--transition), box-shadow var(--transition);
        }

        .nav-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }

        .nav-search i {
            font-size: 13px;
            color: var(--text-muted);
        }

        .nav-search input {
            background: transparent;
            width: 90px;
            font-size: 13px;
            color: var(--text);
            padding: 4px 0;
        }

        .nav-search input::placeholder {
            color: var(--text-muted);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #ffffff;
            font-size: 13px;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: 40px;
            transition: all var(--transition);
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .nav-cta i {
            font-size: 13px;
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
            color: #ffffff;
        }

        .nav-toggle {
            display: none;
            font-size: 20px;
            color: var(--text);
            padding: 4px 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--bg-alt);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 360px;
            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: 0.20;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(37, 99, 235, 0.25) 0%, transparent 70%);
        }

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

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -1px;
            margin-bottom: 16px;
        }

        .page-banner h1 span {
            color: var(--accent-light);
        }

        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .page-banner .banner-tags span {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            color: #ffffff;
            font-size: 13px;
            font-weight: 500;
            padding: 5px 16px;
            border-radius: 40px;
            letter-spacing: 0.3px;
        }

        /* ===== Section General ===== */
        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }

        .section-header h2 span {
            color: var(--primary);
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 580px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-header .overline {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }

        /* ===== Guide Cards Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-bg);
        }

        .guide-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--bg-alt);
        }

        .guide-card .card-body {
            padding: 28px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 3px 12px;
            border-radius: 40px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .guide-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .guide-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
            margin-top: auto;
        }

        .guide-card .card-meta i {
            margin-right: 4px;
        }

        .guide-card .card-meta span {
            display: flex;
            align-items: center;
        }

        .guide-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
            transition: gap var(--transition);
        }

        .guide-card .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== Learning Path / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }

        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px 28px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            position: relative;
        }

        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-bg);
        }

        .step-item .step-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.15;
            line-height: 1;
            margin-bottom: 4px;
        }

        .step-item .step-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }

        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

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

        /* ===== Tools / Resources ===== */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .tool-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 20px 20px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }

        .tool-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-bg);
        }

        .tool-item .tool-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 12px;
            display: block;
        }

        .tool-item h5 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }

        .tool-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .tool-item .tool-badge {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: #ffffff;
            background: var(--primary);
            padding: 2px 12px;
            border-radius: 40px;
            margin-top: 10px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: border var(--transition), box-shadow var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }

        .faq-question:hover {
            background: var(--bg-alt);
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 260px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }

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

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #0f172a;
            font-size: 16px;
            font-weight: 700;
            padding: 14px 34px;
            border-radius: 50px;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.35);
        }

        .cta-section .cta-btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.40);
            color: #0f172a;
        }

        .cta-section .cta-btn i {
            font-size: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
        }

        .site-footer .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .nav-logo {
            font-size: 22px;
            color: #ffffff;
            margin-bottom: 12px;
        }

        .footer-brand .nav-logo span {
            color: var(--primary-light);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
            margin-bottom: 18px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            padding: 4px 0;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
        }

        .footer-col a i {
            margin-right: 6px;
            font-size: 13px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

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

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--primary);
            color: #ffffff;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.30);
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: all var(--transition);
            z-index: 999;
        }

        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.40);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

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

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
            }

            .nav-dock {
                padding: 6px 14px 6px 18px;
                border-radius: 40px;
                margin: 0 12px;
            }

            .nav-links {
                position: fixed;
                top: 76px;
                left: 12px;
                right: 12px;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-radius: var(--radius-lg);
                border: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                flex-direction: column;
                padding: 12px;
                gap: 4px;
                display: none;
                max-height: 80vh;
                overflow-y: auto;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                width: 100%;
                text-align: center;
                padding: 10px 16px;
                font-size: 15px;
            }

            .nav-search {
                display: none;
            }

            .nav-search.mobile-visible {
                display: flex;
                width: 100%;
                margin: 4px 0 8px;
            }

            .nav-cta span {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .page-banner {
                padding: 120px 0 60px;
                min-height: 300px;
            }

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner p {
                font-size: 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-header h2 {
                font-size: 26px;
            }

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

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

            .tools-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .back-top {
                bottom: 20px;
                right: 20px;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .nav-dock {
                padding: 4px 10px 4px 14px;
                gap: 4px;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-logo span {
                font-size: 17px;
            }

            .nav-cta {
                font-size: 12px;
                padding: 5px 12px;
            }

            .nav-cta i {
                font-size: 12px;
            }

            .nav-cta span {
                display: none;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 14px;
            }

            .section-header h2 {
                font-size: 22px;
            }

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

            .guide-card .card-img {
                height: 160px;
            }

            .guide-card .card-body {
                padding: 20px 16px 18px;
            }

            .guide-card h3 {
                font-size: 18px;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }

            .faq-answer {
                font-size: 14px;
                padding: 0 16px;
            }

            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }

            .cta-section h2 {
                font-size: 24px;
            }

            .cta-section .cta-btn {
                font-size: 14px;
                padding: 12px 24px;
            }
        }