/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1a4d8c;
  --primary-light: #2a6cb8;
  --primary-dark: #0f3460;
  --secondary: #f59e0b;
  --secondary-light: #fbbf24;
  --secondary-dark: #d97706;
  --accent: #ef4444;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 48px rgba(0,0,0,0.16);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --max-w: 1200px;
  --header-h: 72px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font);
  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-light); }
img {
  max-width: 100%;
  height: auto;
  display: block;
}
ul, ol { list-style: none; }
button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
button { cursor: pointer; }
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.25;
  font-weight: 700;
  color: var(--text);
}
h1 { font-size: clamp(2.2rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
h4 { font-size: 1.15rem; }
.section-title {
  text-align: center;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: var(--text-light);
  max-width: 640px;
  margin: 0 auto 48px auto;
  font-size: 1.05rem;
}

/* ===== Header / Nav ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow var(--transition);
}
.header.scrolled {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.header .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-dark);
  white-space: nowrap;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.logo span { color: var(--primary); }
.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition);
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width var(--transition);
}
.nav a:hover { color: var(--text); }
.nav a:hover::after { width: 100%; }
.nav a.active {
  color: var(--primary);
  font-weight: 600;
}
.nav a.active::after { width: 100%; }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border-radius: 40px;
  padding: 0 14px;
  height: 40px;
  border: 1px solid var(--border);
  transition: border-color var(--transition), box-shadow var(--transition);
  min-width: 180px;
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,77,140,0.12);
}
.search-box input {
  flex: 1;
  height: 100%;
  background: transparent;
  font-size: 0.9rem;
  color: var(--text);
  padding: 0 8px;
}
.search-box input::placeholder { color: var(--text-light); }
.search-box button {
  color: var(--text-light);
  font-size: 1rem;
  transition: color var(--transition);
  padding: 4px;
}
.search-box button:hover { color: var(--primary); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 12px rgba(26,77,140,0.3);
  white-space: nowrap;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26,77,140,0.4);
  color: #fff;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  border-radius: 40px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.btn-secondary:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  color: #1e293b;
  border-radius: 40px;
  font-weight: 700;
  font-size: 1rem;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(245,158,11,0.35);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245,158,11,0.5);
  color: #1e293b;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--text);
  border-radius: 4px;
  transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 920px) {
  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 24px 32px;
    gap: 18px;
    box-shadow: 0 12px 32px rgba(0,0,0,0.12);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.4s ease, opacity 0.4s ease;
    border-bottom: 1px solid var(--border);
    align-items: stretch;
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav a { font-size: 1.1rem; padding: 8px 0; }
  .nav-actions {
    flex-direction: column;
    gap: 12px;
  }
  .search-box { width: 100%; min-width: 0; }
  .btn-primary { width: 100%; justify-content: center; }
  .menu-toggle { display: flex; }
}
@media (max-width: 480px) {
  :root { --header-h: 64px; }
  .logo { font-size: 1.1rem; }
  .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
}

/* ===== Hero ===== */
.hero {
  margin-top: var(--header-h);
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #0f3460 0%, #1a4d8c 50%, #2a6cb8 100%);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  mix-blend-mode: overlay;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(26,77,140,0.3) 0%, transparent 70%);
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 60px;
}
.hero-content h1 {
  color: var(--text-white);
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.15;
}
.hero-content h1 span {
  background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  color: rgba(255,255,255,0.8);
  font-size: 1.15rem;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-actions .btn-accent { font-size: 1.05rem; padding: 14px 36px; }
.hero-actions .btn-secondary {
  border-color: rgba(255,255,255,0.6);
  color: #fff;
}
.hero-actions .btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: #fff;
}
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-card {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-xl);
  padding: 32px;
  width: 100%;
  max-width: 420px;
}
.hero-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.hero-stat {
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.08);
}
.hero-stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--secondary-light);
  margin-bottom: 4px;
}
.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}
@media (max-width: 920px) {
  .hero { min-height: auto; padding: 40px 0 60px; }
  .hero .container {
    grid-template-columns: 1fr;
    gap: 32px;
    text-align: center;
  }
  .hero-desc { margin: 0 auto 32px; }
  .hero-actions { justify-content: center; }
  .hero-card { max-width: 380px; margin: 0 auto; }
}
@media (max-width: 480px) {
  .hero { padding: 20px 0 40px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-card-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .hero-stat { padding: 14px 10px; }
  .hero-stat-num { font-size: 1.4rem; }
}

/* ===== Features / 品牌特色 ===== */
.features {
  padding: 80px 0;
  background: var(--bg);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
  text-align: center;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(26,77,140,0.08), rgba(26,77,140,0.16));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  color: var(--primary);
}
.feature-card h3 { margin-bottom: 12px; }
.feature-card p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}
@media (max-width: 920px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
  .features { padding: 48px 0; }
}

/* ===== Category Entry / 分类入口 ===== */
.category-entry {
  padding: 72px 0;
  background: var(--bg-alt);
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.category-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.category-card-body {
  padding: 24px 24px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.category-card-body h3 { margin-bottom: 10px; }
.category-card-body p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 18px;
}
.category-card-body .btn-secondary {
  align-self: flex-start;
  padding: 8px 20px;
  font-size: 0.9rem;
}
@media (max-width: 768px) {
  .category-grid { grid-template-columns: 1fr; }
  .category-card-img { height: 180px; }
}

/* ===== Latest News / 最新资讯 ===== */
.latest-news {
  padding: 80px 0;
  background: var(--bg);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.news-card .tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(26,77,140,0.1);
  color: var(--primary);
  border-radius: 40px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 12px;
  align-self: flex-start;
}
.news-card h3 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.4;
}
.news-card p {
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.7;
  flex: 1;
  margin-bottom: 14px;
}
.news-card .meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.82rem;
  color: var(--text-light);
}
.news-card .meta span { display: flex; align-items: center; gap: 4px; }
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  color: var(--text-light);
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
}
@media (max-width: 768px) {
  .news-grid { grid-template-columns: 1fr; }
  .latest-news { padding: 48px 0; }
}

/* ===== Stats / 数据统计 ===== */
.stats-section {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
}
.stats-section .section-title { color: #fff; }
.stats-section .section-sub { color: rgba(255,255,255,0.7); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-item {
  text-align: center;
  padding: 28px 16px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(4px);
}
.stat-item .num {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--secondary-light);
  margin-bottom: 6px;
}
.stat-item .label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.75);
}
@media (max-width: 920px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-item { padding: 20px 12px; }
  .stat-item .num { font-size: 1.8rem; }
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: var(--bg-alt);
}
.faq-list {
  max-width: 740px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  background: none;
  cursor: pointer;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question .icon {
  flex-shrink: 0;
  font-size: 1.2rem;
  transition: transform var(--transition);
  color: var(--text-light);
}
.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-light);
  line-height: 1.8;
  font-size: 0.95rem;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}
@media (max-width: 560px) {
  .faq-section { padding: 48px 0; }
  .faq-question { padding: 14px 18px; font-size: 0.95rem; }
  .faq-answer { padding: 0 18px; font-size: 0.9rem; }
  .faq-item.open .faq-answer { padding: 0 18px 16px; }
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #0f3460 0%, #1a4d8c 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  color: #fff;
  margin-bottom: 16px;
}
.cta-section p {
  color: rgba(255,255,255,0.8);
  max-width: 540px;
  margin: 0 auto 32px;
  font-size: 1.05rem;
}
.cta-section .btn-accent {
  font-size: 1.1rem;
  padding: 16px 44px;
}
@media (max-width: 560px) {
  .cta-section { padding: 48px 0; }
  .cta-section .btn-accent { width: 100%; justify-content: center; }
}

/* ===== Footer ===== */
.footer {
  background: #0b1a2e;
  color: rgba(255,255,255,0.7);
  padding: 48px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .logo span { color: var(--secondary-light); }
.footer-brand p {
  font-size: 0.92rem;
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 18px;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--secondary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: var(--secondary-light); }
@media (max-width: 920px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== Utilities ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 40px;
  font-size: 0.78rem;
  font-weight: 600;
}
.badge-primary { background: rgba(26,77,140,0.12); color: var(--primary); }
.badge-secondary { background: rgba(245,158,11,0.15); color: #b45309; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
        --primary: #e63946;
        --primary-dark: #c1121f;
        --primary-light: #f8d7da;
        --primary-gradient: linear-gradient(135deg, #e63946, #ff6b6b);
        --secondary: #1d3557;
        --secondary-light: #457b9d;
        --accent: #f4a261;
        --accent-gradient: linear-gradient(135deg, #f4a261, #e76f51);
        --bg: #fafafa;
        --bg-alt: #f1f3f5;
        --bg-card: #ffffff;
        --bg-dark: #1a1a2e;
        --text: #212529;
        --text-light: #6c757d;
        --text-white: #ffffff;
        --border: #e9ecef;
        --border-light: #f1f3f5;
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
        --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
        --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
        --shadow-hover: 0 16px 48px rgba(230, 57, 70, 0.15);
        --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        --container: 1200px;
        --nav-height: 72px;
    }

    /* ===== Reset & Base ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        min-height: 100vh;
        padding-top: var(--nav-height);
    }

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

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

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

    button,
    input,
    textarea {
        font-family: inherit;
        font-size: inherit;
        border: none;
        outline: none;
    }

    button {
        cursor: pointer;
        background: none;
    }

    ul,
    ol {
        list-style: none;
    }

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

    /* ===== Header / Nav ===== */
    header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        height: var(--nav-height);
        transition: var(--transition);
    }

    header.scrolled {
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--nav-height);
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 22px;
        font-weight: 800;
        color: var(--secondary);
        letter-spacing: -0.5px;
        flex-shrink: 0;
    }

    .logo .logo-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        background: var(--primary-gradient);
        color: #fff;
        border-radius: var(--radius-sm);
        font-size: 18px;
        font-weight: 700;
    }

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

    .nav {
        display: flex;
        align-items: center;
        gap: 32px;
        flex: 1;
        justify-content: center;
    }

    .nav a {
        font-size: 15px;
        font-weight: 500;
        color: var(--text);
        padding: 8px 4px;
        position: relative;
        white-space: nowrap;
        transition: var(--transition);
    }

    .nav a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2.5px;
        background: var(--primary-gradient);
        border-radius: 4px;
        transition: var(--transition);
    }

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

    .nav a:hover::after {
        width: 100%;
    }

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

    .nav a.active::after {
        width: 100%;
    }

    .nav-actions {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-shrink: 0;
    }

    .search-box {
        display: flex;
        align-items: center;
        background: var(--bg-alt);
        border-radius: 50px;
        padding: 0 8px 0 16px;
        border: 1px solid transparent;
        transition: var(--transition);
    }

    .search-box:focus-within {
        border-color: var(--primary);
        background: #fff;
        box-shadow: 0 0 0 4px rgba(230, 57, 70, 0.1);
    }

    .search-box input {
        background: transparent;
        padding: 8px 0;
        width: 160px;
        font-size: 14px;
        color: var(--text);
    }

    .search-box input::placeholder {
        color: var(--text-light);
    }

    .search-box button {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        color: var(--text-light);
        transition: var(--transition);
    }

    .search-box button:hover {
        color: var(--primary);
        background: var(--primary-light);
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 10px 24px;
        background: var(--primary-gradient);
        color: #fff !important;
        border-radius: 50px;
        font-weight: 600;
        font-size: 14px;
        gap: 8px;
        transition: var(--transition);
        box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
        white-space: nowrap;
        border: none;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(230, 57, 70, 0.4);
        color: #fff !important;
    }

    .btn-primary:active {
        transform: translateY(0);
    }

    .btn-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 10px 24px;
        background: transparent;
        color: var(--secondary) !important;
        border: 2px solid var(--border);
        border-radius: 50px;
        font-weight: 600;
        font-size: 14px;
        transition: var(--transition);
        white-space: nowrap;
    }

    .btn-secondary:hover {
        border-color: var(--primary);
        color: var(--primary) !important;
        transform: translateY(-2px);
    }

    /* Mobile menu toggle */
    .menu-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        cursor: pointer;
        background: none;
        border: none;
    }

    .menu-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--text);
        border-radius: 4px;
        transition: var(--transition);
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* ===== Page Hero / Banner ===== */
    .page-banner {
        position: relative;
        padding: 80px 0 72px;
        background: var(--secondary);
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        overflow: hidden;
    }

    .page-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(29, 53, 87, 0.92), rgba(69, 123, 157, 0.8));
        z-index: 1;
    }

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

    .page-banner h1 {
        font-size: 42px;
        font-weight: 800;
        color: var(--text-white);
        margin-bottom: 16px;
        line-height: 1.2;
        letter-spacing: -0.5px;
    }

    .page-banner p {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.85);
        max-width: 640px;
        line-height: 1.7;
    }

    .page-banner .banner-tag {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(8px);
        padding: 6px 16px;
        border-radius: 50px;
        font-size: 13px;
        color: #fff;
        margin-bottom: 20px;
        border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-top: 24px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.7);
    }

    .breadcrumb a {
        color: rgba(255, 255, 255, 0.85);
    }

    .breadcrumb a:hover {
        color: #fff;
    }

    .breadcrumb span {
        color: rgba(255, 255, 255, 0.5);
    }

    /* ===== Category Nav Tabs ===== */
    .category-tabs {
        background: #fff;
        border-bottom: 1px solid var(--border);
        padding: 16px 0;
        position: sticky;
        top: var(--nav-height);
        z-index: 100;
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    }

    .category-tabs .tabs-scroll {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        padding-bottom: 4px;
        scrollbar-width: none;
    }

    .category-tabs .tabs-scroll::-webkit-scrollbar {
        display: none;
    }

    .category-tabs .tab-btn {
        padding: 8px 20px;
        border-radius: 50px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-light);
        background: var(--bg-alt);
        white-space: nowrap;
        transition: var(--transition);
        border: 1px solid transparent;
    }

    .category-tabs .tab-btn:hover {
        color: var(--primary);
        background: var(--primary-light);
    }

    .category-tabs .tab-btn.active {
        color: #fff;
        background: var(--primary-gradient);
        border-color: transparent;
        box-shadow: 0 4px 16px rgba(230, 57, 70, 0.25);
    }

    /* ===== Article Grid ===== */
    .section-articles {
        padding: 60px 0 80px;
        background: var(--bg);
    }

    .section-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-bottom: 40px;
        gap: 24px;
        flex-wrap: wrap;
    }

    .section-header .section-title {
        font-size: 28px;
        font-weight: 700;
        color: var(--secondary);
        letter-spacing: -0.3px;
    }

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

    .section-header .section-sub {
        color: var(--text-light);
        font-size: 15px;
        margin-top: 6px;
    }

    .section-header .view-all {
        font-size: 15px;
        font-weight: 600;
        color: var(--primary);
        display: flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition);
    }

    .section-header .view-all:hover {
        gap: 12px;
    }

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

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

    .article-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(230, 57, 70, 0.15);
    }

    .article-card .card-img {
        position: relative;
        aspect-ratio: 16 / 10;
        overflow: hidden;
        background: var(--bg-alt);
    }

    .article-card .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }

    .article-card:hover .card-img img {
        transform: scale(1.05);
    }

    .article-card .card-img .card-tag {
        position: absolute;
        top: 12px;
        left: 12px;
        background: var(--primary-gradient);
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        padding: 4px 12px;
        border-radius: 50px;
        box-shadow: 0 2px 8px rgba(230, 57, 70, 0.3);
    }

    .article-card .card-img .card-hot {
        position: absolute;
        top: 12px;
        right: 12px;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        color: #fff;
        font-size: 12px;
        padding: 4px 10px;
        border-radius: 50px;
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .article-card .card-body {
        padding: 20px 22px 22px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .article-card .card-body .card-meta {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 13px;
        color: var(--text-light);
        margin-bottom: 10px;
    }

    .article-card .card-body .card-meta span {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .article-card .card-body h3 {
        font-size: 18px;
        font-weight: 700;
        color: var(--secondary);
        line-height: 1.4;
        margin-bottom: 10px;
        transition: var(--transition);
    }

    .article-card:hover .card-body h3 {
        color: var(--primary);
    }

    .article-card .card-body p {
        font-size: 14px;
        color: var(--text-light);
        line-height: 1.7;
        flex: 1;
    }

    .article-card .card-body .card-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-top: 16px;
        padding-top: 14px;
        border-top: 1px solid var(--border-light);
    }

    .article-card .card-body .card-footer .read-more {
        font-size: 14px;
        font-weight: 600;
        color: var(--primary);
        display: flex;
        align-items: center;
        gap: 4px;
        transition: var(--transition);
    }

    .article-card .card-body .card-footer .read-more:hover {
        gap: 10px;
    }

    .article-card .card-body .card-footer .stats {
        display: flex;
        gap: 12px;
        font-size: 13px;
        color: var(--text-light);
    }

    .article-card .card-body .card-footer .stats span {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    /* Featured article (larger) */
    .article-featured {
        grid-column: 1 / -1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0;
        border-radius: var(--radius-lg);
        overflow: hidden;
        background: var(--bg-card);
        box-shadow: var(--shadow-md);
        border: 1px solid var(--border);
    }

    .article-featured .card-img {
        aspect-ratio: auto;
        height: 100%;
        min-height: 320px;
    }

    .article-featured .card-img img {
        height: 100%;
    }

    .article-featured .card-body {
        padding: 32px 36px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .article-featured .card-body .featured-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--accent-gradient);
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        padding: 4px 14px;
        border-radius: 50px;
        margin-bottom: 16px;
        width: fit-content;
    }

    .article-featured .card-body h3 {
        font-size: 26px;
        margin-bottom: 14px;
    }

    .article-featured .card-body p {
        font-size: 15px;
    }

    /* ===== Hot Topics / Trending ===== */
    .section-trending {
        padding: 60px 0;
        background: var(--bg-alt);
    }

    .trending-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .trending-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 24px 22px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
        text-align: center;
    }

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

    .trending-card .trend-icon {
        width: 52px;
        height: 52px;
        border-radius: var(--radius-sm);
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        margin: 0 auto 16px;
        transition: var(--transition);
    }

    .trending-card:hover .trend-icon {
        background: var(--primary-gradient);
        color: #fff;
    }

    .trending-card h4 {
        font-size: 16px;
        font-weight: 700;
        color: var(--secondary);
        margin-bottom: 8px;
    }

    .trending-card p {
        font-size: 13px;
        color: var(--text-light);
        line-height: 1.6;
    }

    .trending-card .trend-num {
        display: inline-block;
        font-size: 12px;
        font-weight: 700;
        color: var(--primary);
        background: var(--primary-light);
        padding: 2px 12px;
        border-radius: 50px;
        margin-top: 12px;
    }

    /* ===== Newsletter / CTA ===== */
    .section-cta {
        padding: 64px 0;
        background: var(--secondary);
        background-image: url('/assets/images/backpic/back-3.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        position: relative;
    }

    .section-cta::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(29, 53, 87, 0.92), rgba(69, 123, 157, 0.85));
    }

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

    .section-cta h2 {
        font-size: 32px;
        font-weight: 800;
        color: var(--text-white);
        margin-bottom: 16px;
        letter-spacing: -0.3px;
    }

    .section-cta p {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.85);
        max-width: 520px;
        margin: 0 auto 32px;
    }

    .cta-form {
        display: flex;
        gap: 12px;
        max-width: 480px;
        margin: 0 auto;
        flex-wrap: wrap;
        justify-content: center;
    }

    .cta-form input {
        flex: 1;
        min-width: 200px;
        padding: 14px 20px;
        border-radius: 50px;
        border: 1px solid rgba(255, 255, 255, 0.25);
        background: rgba(255, 255, 255, 0.12);
        backdrop-filter: blur(8px);
        color: #fff;
        font-size: 15px;
    }

    .cta-form input::placeholder {
        color: rgba(255, 255, 255, 0.6);
    }

    .cta-form input:focus {
        border-color: rgba(255, 255, 255, 0.6);
        background: rgba(255, 255, 255, 0.2);
    }

    .cta-form .btn-primary {
        padding: 14px 32px;
        font-size: 15px;
    }

    /* ===== FAQ ===== */
    .section-faq {
        padding: 60px 0 72px;
        background: var(--bg);
    }

    .faq-grid {
        max-width: 800px;
        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: var(--transition);
    }

    .faq-item:hover {
        border-color: rgba(230, 57, 70, 0.2);
    }

    .faq-item .faq-question {
        width: 100%;
        padding: 20px 24px;
        font-size: 16px;
        font-weight: 600;
        color: var(--secondary);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        text-align: left;
        background: none;
        transition: var(--transition);
    }

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

    .faq-item .faq-question .faq-icon {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--bg-alt);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        transition: var(--transition);
        color: var(--text-light);
    }

    .faq-item.active .faq-question .faq-icon {
        background: var(--primary-gradient);
        color: #fff;
        transform: rotate(45deg);
    }

    .faq-item .faq-answer {
        padding: 0 24px 20px;
        font-size: 15px;
        color: var(--text-light);
        line-height: 1.8;
        display: none;
    }

    .faq-item.active .faq-answer {
        display: block;
    }

    /* ===== Footer ===== */
    .footer {
        background: var(--bg-dark);
        color: rgba(255, 255, 255, 0.8);
        padding: 56px 0 32px;
    }

    .footer .footer-grid {
        display: grid;
        grid-template-columns: 1.5fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }

    .footer .footer-brand .logo {
        color: #fff;
        margin-bottom: 16px;
        font-size: 20px;
    }

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

    .footer .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.6);
        max-width: 320px;
    }

    .footer .footer-col h4 {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 18px;
    }

    .footer .footer-col a {
        display: block;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.6);
        margin-bottom: 12px;
        transition: var(--transition);
    }

    .footer .footer-col a:hover {
        color: var(--primary);
        transform: translateX(4px);
    }

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

    .footer .footer-bottom a {
        color: rgba(255, 255, 255, 0.6);
    }

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

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

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

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

    @media (max-width: 768px) {
        :root {
            --nav-height: 64px;
        }

        .header-inner {
            padding: 0 16px;
        }

        .nav {
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            flex-direction: column;
            padding: 20px 24px 28px;
            gap: 12px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            transform: translateY(-120%);
            opacity: 0;
            transition: var(--transition);
            border-bottom: 2px solid var(--border);
            align-items: stretch;
            z-index: 999;
        }

        .nav.open {
            transform: translateY(0);
            opacity: 1;
        }

        .nav a {
            font-size: 16px;
            padding: 12px 0;
        }

        .nav-actions {
            flex-direction: column;
            gap: 12px;
            margin-top: 8px;
        }

        .search-box {
            width: 100%;
        }

        .search-box input {
            width: 100%;
            flex: 1;
        }

        .menu-toggle {
            display: flex;
        }

        .page-banner {
            padding: 56px 0 48px;
        }

        .page-banner h1 {
            font-size: 28px;
        }

        .page-banner p {
            font-size: 15px;
        }

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

        .article-featured {
            grid-template-columns: 1fr;
        }

        .article-featured .card-img {
            min-height: 200px;
        }

        .article-featured .card-body {
            padding: 22px 24px;
        }

        .article-featured .card-body h3 {
            font-size: 20px;
        }

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

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

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

        .cta-form {
            flex-direction: column;
            align-items: stretch;
        }

        .cta-form input {
            min-width: auto;
            width: 100%;
        }

        .footer .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }

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

        .category-tabs .tabs-scroll {
            gap: 6px;
        }

        .category-tabs .tab-btn {
            padding: 6px 16px;
            font-size: 13px;
        }
    }

    @media (max-width: 520px) {
        .trending-grid {
            grid-template-columns: 1fr;
        }

        .page-banner h1 {
            font-size: 24px;
        }

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

        .article-card .card-body h3 {
            font-size: 16px;
        }

        .section-cta h2 {
            font-size: 20px;
        }
    }

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

    .animate-in {
        animation: fadeInUp 0.6s ease forwards;
    }

    .animate-in-delay-1 {
        animation-delay: 0.1s;
    }
    .animate-in-delay-2 {
        animation-delay: 0.2s;
    }
    .animate-in-delay-3 {
        animation-delay: 0.3s;
    }
    .animate-in-delay-4 {
        animation-delay: 0.4s;
    }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #ffffff;
            --bg-alt: #f8f9fa;
            --bg-dark: #1a1a2e;
            --text: #1d1d1f;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e5e7eb;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 8px 30px rgba(230, 57, 70, 0.15);
            --transition: 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;
            --container: 1200px;
            --nav-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: 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: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        h1 {
            font-size: 2.4rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }

        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }

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

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(229, 231, 235, 0.6);
            height: var(--nav-height);
            transition: var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.06);
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            gap: 32px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 1.2rem;
            font-weight: 700;
        }

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

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

        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.10);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.10);
        }

        .search-box input {
            padding: 8px 12px;
            font-size: 0.9rem;
            background: transparent;
            color: var(--text);
            min-width: 160px;
        }

        .search-box input::placeholder {
            color: var(--text-light);
        }

        .search-box button {
            padding: 8px 4px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            transition: var(--transition);
        }

        .search-box button:hover {
            color: var(--primary);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid var(--primary);
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(230, 57, 70, 0.30);
        }

        .btn-primary-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: transparent;
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid var(--primary);
        }

        .btn-primary-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Mobile toggle */
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            background: none;
            border: none;
        }

        .mobile-toggle span {
            width: 26px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero Banner (inner) ===== */
        .page-hero {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--secondary) 100%);
            position: relative;
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .page-hero h1 {
            color: var(--text-white);
            font-size: 2.6rem;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .page-hero p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto 16px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }

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

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-body {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border);
        }

        .article-meta .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        .article-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--text-light);
            font-size: 0.9rem;
        }

        .article-meta .date i {
            font-size: 0.85rem;
        }

        .article-cover {
            width: 100%;
            border-radius: var(--radius);
            margin-bottom: 32px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .article-cover img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius);
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-content p {
            margin-bottom: 1.4rem;
            color: var(--text);
            font-size: 1.05rem;
        }

        .article-content h2,
        .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.6rem;
        }

        .article-content li {
            margin-bottom: 0.5rem;
            color: var(--text);
            list-style: disc;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }

        .article-content img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px;
            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: inline-block;
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
            color: var(--text);
        }

        .sidebar-list a:hover {
            background: rgba(230, 57, 70, 0.06);
            color: var(--primary);
            transform: translateX(4px);
        }

        .sidebar-list a .num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 600;
            flex-shrink: 0;
        }

        .sidebar-list a .num-alt {
            background: var(--secondary);
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border: none;
            text-align: center;
        }

        .sidebar-cta h3 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, 0.3);
        }

        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .sidebar-cta .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: #fff;
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }

        .sidebar-cta .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }

        .not-found-box .icon {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }

        .not-found-box h2 {
            font-size: 2rem;
            margin-bottom: 12px;
        }

        .not-found-box p {
            color: var(--text-light);
            margin-bottom: 32px;
            font-size: 1.1rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }

        .footer .container {
            padding: 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            max-width: 360px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            padding: 6px 0;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

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

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
            }

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

            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }

            .mobile-toggle {
                display: flex;
            }

            .nav-actions .search-box {
                display: none;
            }

            .nav-actions .btn-primary {
                padding: 8px 18px;
                font-size: 0.85rem;
            }

            .page-hero {
                padding: 100px 0 40px;
                min-height: 220px;
            }

            .page-hero h1 {
                font-size: 1.8rem;
            }

            .page-hero p {
                font-size: 1rem;
            }

            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.25rem;
            }

            .article-main {
                padding: 40px 0 60px;
            }

            .article-content {
                font-size: 1rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

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

            .nav {
                padding: 0 16px;
                gap: 12px;
            }

            .logo {
                font-size: 1.15rem;
            }

            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }

            .nav-actions .btn-primary {
                padding: 6px 14px;
                font-size: 0.8rem;
            }

            .page-hero h1 {
                font-size: 1.5rem;
            }

            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .sidebar-card {
                padding: 20px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-8 {
            margin-bottom: 32px;
        }
        .gap-4 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }