/* roulang page: index */
:root {
  --primary: #0f2f4b;
  --primary-light: #1a5276;
  --primary-deep: #0a1a26;
  --secondary: #0e7aa5;
  --accent: #f2a71b;
  --accent-dark: #d18c0b;
  --accent-soft: #fff4e0;
  --bg: #ffffff;
  --bg-soft: #f5f8fb;
  --bg-dark: #0b1e2d;
  --text: #1f2d3a;
  --text-muted: #5f7488;
  --text-light: #a8b8c7;
  --border: #e3eaf1;
  --border-dark: rgba(255,255,255,0.14);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 8px 30px rgba(10, 26, 38, 0.08);
  --shadow-lg: 0 20px 50px rgba(10, 26, 38, 0.14);
  --shadow-accent: 0 10px 30px rgba(242, 167, 27, 0.25);
  --transition: all 0.35s ease;
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Noto Sans SC", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; height: auto; }
a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: var(--font); }

.container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ============ Header / Nav ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: transparent;
  padding: 18px 0 0;
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(20px);
}

.nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: linear-gradient(135deg, rgba(11,35,58,0.96), rgba(20,55,85,0.98));
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 12px 22px;
  box-shadow: 0 12px 35px rgba(5,15,25,0.35);
}

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

.brand-icon {
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: var(--primary-deep);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-accent);
}

.brand-text {
  color: #ffffff;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand-text strong {
  color: var(--accent);
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}

.nav-link {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.03em;
  background: transparent;
  border: 1px solid transparent;
  transition: var(--transition);
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.1);
}

.nav-link.active {
  color: var(--primary-deep);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
  box-shadow: 0 6px 18px rgba(242,167,27,0.3);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 24px;
  line-height: 1.4;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--primary-deep);
  border-color: var(--accent);
  box-shadow: 0 6px 20px rgba(242,167,27,0.25);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: var(--primary-deep);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(242,167,27,0.35);
}

.btn-outline {
  background: transparent;
  color: #ffffff;
  border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: #ffffff;
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-light {
  background: #ffffff;
  color: var(--primary-deep);
  border-color: #ffffff;
  box-shadow: var(--shadow);
}

.btn-light:hover {
  background: var(--accent-soft);
  color: var(--primary-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 10px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255,255,255,0.1);
  color: #ffffff;
  font-size: 20px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-toggle:hover {
  background: rgba(255,255,255,0.2);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 80px 0 90px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  margin-top: -84px;
  padding-top: 164px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(5,18,30,0.95) 0%, rgba(8,28,45,0.85) 45%, rgba(10,35,55,0.65) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 50px;
}

.hero-content {
  flex: 1.15;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(242,167,27,0.15);
  border: 1px solid rgba(242,167,27,0.35);
  color: var(--accent);
  padding: 7px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 42px;
  line-height: 1.3;
  font-weight: 800;
  color: #ffffff;
  margin: 0 0 18px;
  letter-spacing: 0.01em;
}

.hero-title span {
  color: var(--accent);
  position: relative;
}

.hero-desc {
  color: rgba(255,255,255,0.82);
  font-size: 16px;
  line-height: 1.8;
  max-width: 560px;
  margin: 0 0 32px;
}

.hero-btns {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 22px;
  color: rgba(255,255,255,0.45);
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero-note i {
  color: var(--accent);
}

.hero-cards {
  flex: 0.85;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.hero-card {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius);
  padding: 24px 20px;
  color: #ffffff;
  transition: var(--transition);
}

.hero-card:first-child {
  grid-column: 1 / -1;
  background: rgba(242,167,27,0.92);
  border-color: transparent;
  color: var(--primary-deep);
}

.hero-card .num {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 4px;
}

.hero-card .label {
  font-size: 13px;
  opacity: 0.8;
}

.hero-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.9;
}

.hero-card .desc {
  margin-top: 6px;
}

/* ============ Section Base ============ */
.section {
  padding: 96px 0;
}

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

.section-dark {
  background: var(--bg-dark);
  background-image: linear-gradient(rgba(5,18,30,0.92), rgba(5,18,30,0.95)), url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  color: #ffffff;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 58px;
}

.section-tag {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.section-dark .section-tag {
  background: rgba(242,167,27,0.15);
  color: var(--accent);
}

.section-head h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.35;
  margin: 0 0 14px;
}

.section-dark .section-head h2 {
  color: #ffffff;
}

.section-head p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
}

.section-dark .section-head p {
  color: var(--text-light);
}

/* ============ Intro ============ */
.intro-grid {
  display: flex;
  align-items: center;
  gap: 60px;
}

.intro-media {
  flex: 1;
  position: relative;
}

.intro-media .main-img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.intro-media::after {
  content: "";
  position: absolute;
  width: 60%;
  height: 60%;
  right: -14px;
  bottom: -14px;
  border-radius: var(--radius);
  border: 3px solid var(--accent);
  z-index: -1;
  opacity: 0.3;
}

.intro-content {
  flex: 1;
}

.intro-content .section-tag {
  margin-bottom: 12px;
}

.intro-content h2 {
  font-size: 32px;
  color: var(--primary);
  font-weight: 800;
  line-height: 1.35;
  margin: 0 0 20px;
}

.intro-content > p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.9;
  margin: 0 0 26px;
}

.intro-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 0 0 32px;
}

.intro-point {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: var(--transition);
}

.intro-point:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: var(--secondary);
}

.intro-point i {
  color: var(--accent);
  font-size: 18px;
  margin-top: 3px;
}

.intro-point strong {
  display: block;
  font-size: 15px;
  color: var(--primary);
  margin-bottom: 4px;
}

.intro-point span {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ============ Section Divider ============ */
.divider-band {
  background: var(--primary);
  padding: 45px 0;
  color: #ffffff;
}

.divider-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.divider-band h3 {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 6px;
}

.divider-band p {
  color: rgba(255,255,255,0.72);
  margin: 0;
  font-size: 14px;
}

/* ============ Category Entry ============ */
.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 360px;
  display: flex;
  align-items: flex-end;
  background: url('/assets/images/coverpic/cover-2.png') center center / cover no-repeat;
  box-shadow: var(--shadow);
}

.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,30,50,0) 20%, rgba(10,30,50,0.85) 100%);
}

.category-card-body {
  position: relative;
  z-index: 2;
  padding: 36px;
  color: #ffffff;
  width: 100%;
}

.category-card .cat-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  background: rgba(255,255,255,0.2);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 18px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.25);
}

.category-card h3 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 8px;
}

.category-card p {
  color: rgba(255,255,255,0.8);
  margin: 0 0 20px;
  max-width: 520px;
  line-height: 1.8;
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 100px;
  padding: 9px 22px;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.category-link:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--primary-deep);
  box-shadow: var(--shadow-accent);
}

/* ============ Latest News ============ */
.news-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 32px;
  align-items: start;
}

.news-featured {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.news-featured:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.news-featured img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.news-featured-body {
  padding: 28px;
}

.badge {
  display: inline-block;
  background: var(--accent);
  color: var(--primary-deep);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: 0.03em;
  margin-bottom: 14px;
}

.news-featured-body h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.5;
  margin: 0 0 12px;
}

.news-featured-body p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
}

.news-list {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 24px;
  box-shadow: var(--shadow);
  max-height: 600px;
  overflow-y: auto;
}

.news-list::-webkit-scrollbar { width: 5px; }
.news-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
.news-list::-webkit-scrollbar-track { background: transparent; }

.news-item {
  display: flex;
  gap: 18px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.news-item:last-child { border-bottom: none; }

.news-item:hover { background: var(--bg-soft); }

.news-item-date {
  flex-shrink: 0;
  width: 64px;
  text-align: center;
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 8px 4px;
  align-self: flex-start;
}

.news-item-date span {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

.news-item-content { flex: 1; min-width: 0; }

.news-item-cat {
  display: inline-block;
  font-size: 12px;
  color: var(--secondary);
  background: rgba(14,122,165,0.08);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 6px;
  font-weight: 500;
}

.news-item-content h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin: 0 0 6px;
  line-height: 1.5;
}

.news-item-content h4 a { color: inherit; }
.news-item-content h4 a:hover { color: var(--secondary); }

.news-item-content p {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.empty-tip {
  text-align: center;
  color: var(--text-muted);
  padding: 30px 0;
  font-size: 15px;
}

/* ============ Stats ============ */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  padding: 34px 24px;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(242,167,27,0.4);
  transform: translateY(-4px);
}

.stat-num {
  font-size: 38px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.75);
}

/* ============ Process ============ */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}

.process-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 24px;
  position: relative;
  transition: var(--transition);
  text-align: center;
}

.process-step:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.process-step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin: 0 auto 18px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 20px;
  font-weight: 800;
  border-radius: 14px;
}

.process-step i {
  display: block;
  font-size: 28px;
  color: var(--secondary);
  margin-bottom: 16px;
}

.process-step h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin: 0 0 12px;
}

.process-step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin: 0;
}

/* ============ Features ============ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

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

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.feature-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.feature-card-body {
  padding: 26px 24px;
}

.feature-card-body i {
  width: 44px;
  height: 44px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: 16px;
}

.feature-card-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--primary);
  margin: 0 0 10px;
}

.feature-card-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 0 0 18px;
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-list li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 5px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list li i {
  width: auto;
  height: auto;
  background: none;
  color: var(--accent);
  font-size: 12px;
  margin: 0;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  padding: 22px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  background: transparent;
  transition: var(--transition);
}

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

.faq-question i {
  color: var(--accent);
  font-size: 14px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-answer-inner {
  padding: 0 26px 22px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

/* ============ CTA ============ */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(10,30,50,0.78);
}

.cta-box {
  position: relative;
  z-index: 2;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
  color: #ffffff;
}

.cta-box h2 {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 14px;
  color: #ffffff;
}

.cta-box p {
  color: rgba(255,255,255,0.75);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 30px;
}

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

/* ============ Footer ============ */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255,255,255,0.72);
  padding: 70px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding-bottom: 50px;
}

.footer-brand .brand {
  margin-bottom: 18px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 260px;
}

.footer-col h4 {
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 18px;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.footer-col ul a {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  transition: var(--transition);
}

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

.footer-contact p {
  font-size: 14px;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-contact i {
  color: var(--accent);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0;
  text-align: center;
  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(--accent);
}

/* ============ Responsive ============ */
@media screen and (max-width: 1024px) {
  .hero { padding-top: 140px; }
  .hero-title { font-size: 36px; }
  .hero-inner { flex-direction: column; gap: 40px; }
  .hero-cards { width: 100%; }
  .intro-grid { flex-direction: column; gap: 40px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .news-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media screen and (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 42px; }
  .section-head h2 { font-size: 28px; }
  
  .nav-panel { flex-wrap: wrap; padding: 12px 16px; }
  .nav-links {
    order: 3;
    width: 100%;
    display: none;
    flex-direction: column;
    gap: 4px;
    padding-top: 10px;
  }
  .nav-links.open { display: flex; }
  .nav-link { width: 100%; text-align: center; }
  .nav-toggle { display: flex; }
  .nav-actions .btn { display: none; }
  .hero { padding-top: 130px; }
  .hero-cards { grid-template-columns: 1fr 1fr; }
  .category-card { min-height: 300px; }
  .category-card-body { padding: 24px; }
  .faq-question { padding: 18px 20px; font-size: 15px; }
  .cta-box { padding: 40px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media screen and (max-width: 520px) {
  .container { padding: 0 16px; }
  .hero { padding-top: 120px; padding-bottom: 60px; }
  .hero-title { font-size: 28px; }
  .hero-desc { font-size: 14px; }
  .hero-cards { grid-template-columns: 1fr; }
  .hero-card:first-child { grid-column: auto; }
  .hero-btns { flex-direction: column; align-items: stretch; }
  .hero-btns .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .intro-points { grid-template-columns: 1fr; }
  .brand-text { font-size: 17px; }
  .brand-icon { width: 38px; height: 38px; }
  .footer-grid { grid-template-columns: 1fr; }
}

/* roulang page: article */
:root {
  --primary: #1e5eff;
  --primary-dark: #0d3bbf;
  --primary-light: #eaf0ff;
  --accent: #00c2a8;
  --accent-light: #e0faf5;
  --warning: #ff9f1c;
  --dark: #0c1427;
  --dark-2: #121e33;
  --dark-3: #182642;
  --text: #2b3445;
  --text-weak: #6b7686;
  --border: #e6eaf0;
  --bg-light: #f5f7fb;
  --bg-deep: #ecf0f8;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(12, 20, 39, 0.05);
  --shadow-md: 0 8px 28px rgba(12, 20, 39, 0.08);
  --shadow-lg: 0 16px 48px rgba(12, 20, 39, 0.12);
  --space: 7rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }
ul, ol, p, figure, blockquote { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--dark); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

::selection { background: var(--primary); color: #fff; }

:focus-visible { outline: 3px solid rgba(30, 94, 255, 0.4); outline-offset: 2px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(230, 234, 240, 0.7);
}

.nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 20px;
}

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

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, #7b5cff 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 6px 16px rgba(30, 94, 255, 0.25);
  flex-shrink: 0;
}

.brand-text {
  font-size: 20px;
  font-weight: 500;
  color: var(--dark);
  letter-spacing: -0.5px;
  line-height: 1.2;
}
.brand-text strong {
  font-weight: 900;
  color: var(--primary);
  display: block;
  font-size: 14px;
  letter-spacing: 2px;
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-light);
  padding: 5px;
  border-radius: 50px;
  border: 1px solid var(--border);
}

.nav-link {
  padding: 9px 22px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-weak);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover { color: var(--primary); background: rgba(30, 94, 255, 0.06); }

.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px rgba(30, 94, 255, 0.25);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
  border: none;
  cursor: pointer;
  line-height: 1.2;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 16px rgba(30, 94, 255, 0.25);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(30, 94, 255, 0.35);
}
.btn-primary:active { transform: translateY(0); }

.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(0, 194, 168, 0.25);
}
.btn-accent:hover {
  background: #00a88f;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 194, 168, 0.35);
}
.btn-accent:active { transform: translateY(0); }

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

.btn-light {
  background: #fff;
  color: var(--dark);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12); }

.btn-sm { padding: 9px 18px; font-size: 13px; }
.btn-lg { padding: 16px 38px; font-size: 16px; }

.btn-block { width: 100%; }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  color: var(--dark);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover { background: var(--primary-light); color: var(--primary); }

/* ===== Mobile Nav ===== */
.mobile-nav {
  display: none;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 16px 0 24px;
  box-shadow: var(--shadow-md);
}

.mobile-nav.open { display: block; }

.mobile-nav .mobile-nav-links { display: flex; flex-direction: column; gap: 4px; }

.mobile-nav .mobile-nav-link {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.mobile-nav .mobile-nav-link:hover { background: var(--bg-light); color: var(--primary); }
.mobile-nav .mobile-nav-link.active { background: var(--primary-light); color: var(--primary); font-weight: 700; }

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 5rem 0 3rem;
  background: linear-gradient(135deg, #0c1427 0%, #121e33 50%, #1e5eff 130%);
  overflow: hidden;
}

.article-hero::before {
  content: '';
  position: absolute;
  top: -140px;
  right: -100px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 94, 255, 0.35) 0%, transparent 70%);
}

.article-hero::after {
  content: '';
  position: absolute;
  bottom: -120px;
  left: -60px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 194, 168, 0.25) 0%, transparent 70%);
}

.article-hero-inner { position: relative; z-index: 2; max-width: 860px; }

.article-hero .category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 18px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border-radius: 50px;
  color: #fff;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.5px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  margin-bottom: 20px;
}

.article-hero h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 900;
  color: #fff;
  line-height: 1.35;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.article-hero .hero-description {
  font-size: clamp(15px, 2vw, 18px);
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 720px;
}

.article-hero .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
}

.hero-meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero-meta i { font-size: 14px; opacity: 0.8; }

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
  background: var(--bg-light);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; color: var(--text-weak); }
.breadcrumb a { color: var(--primary); font-weight: 500; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: #b0b8c4; font-size: 12px; }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ===== Article Body ===== */
.article-main {
  padding: var(--space) 0 4.5rem;
  background: var(--bg-light);
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 44px;
  align-items: start;
}

.article-card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  overflow: hidden;
}

.article-body-inner { padding: 44px 48px; }

.article-body-inner .article-lead {
  font-size: 18px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.9;
  border-left: 4px solid var(--primary);
  padding-left: 20px;
  margin-bottom: 30px;
  background: linear-gradient(90deg, var(--primary-light) 0%, transparent 100%);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-body-inner h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark);
  margin: 36px 0 18px;
  padding-bottom: 12px;
  position: relative;
}

.article-body-inner h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.article-body-inner h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--dark);
  margin: 26px 0 14px;
}

.article-body-inner p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
  margin-bottom: 18px;
}

.article-body-inner ul, .article-body-inner ol {
  margin: 0 0 22px 0;
  padding: 0;
  list-style: none;
}

.article-body-inner ul li, .article-body-inner ol li {
  position: relative;
  padding-left: 26px;
  margin-bottom: 10px;
  line-height: 1.8;
  font-size: 16px;
  color: var(--text);
}

.article-body-inner ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.article-body-inner ol { counter-reset: article-ol; }
.article-body-inner ol li { counter-increment: article-ol; }
.article-body-inner ol li::before {
  content: counter(article-ol);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 0;
}

.article-body-inner blockquote {
  background: linear-gradient(135deg, var(--bg-light), #f0f3fa);
  border-left: 4px solid var(--accent);
  padding: 24px 28px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 26px 0;
  font-style: italic;
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}

.article-body-inner blockquote strong { color: var(--dark); font-style: normal; }

.article-body-inner .word-highlight {
  background: linear-gradient(180deg, transparent 60%, rgba(255, 159, 28, 0.3) 60%);
  padding: 0 4px;
  font-weight: 600;
  color: var(--dark);
}

.article-body-inner .inline-stats {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  padding: 2px 12px;
  border-radius: 30px;
  font-size: 14px;
}

.article-body-inner strong { color: var(--dark); font-weight: 700; }

.article-body-inner a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body-inner a:hover { color: var(--primary-dark); }

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}

.article-tags .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-weak);
  transition: var(--transition);
}

.article-tags .tag:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

.article-not-found {
  text-align: center;
  padding: 100px 40px;
}

.article-not-found i { font-size: 64px; color: #c8d0dc; margin-bottom: 24px; }
.article-not-found h2 { font-size: 28px; margin-bottom: 12px; }
.article-not-found p { color: var(--text-weak); margin-bottom: 28px; }

/* ===== Sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; }

.sidebar-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 28px;
  transition: var(--transition);
}

.sidebar-card:hover { box-shadow: var(--shadow-md); }

.sidebar-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--primary-light);
  position: relative;
}

.sidebar-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 36px;
  height: 2px;
  background: var(--primary);
}

.sidebar-title i { color: var(--primary); }

.sidebar-link-list { display: flex; flex-direction: column; gap: 4px; }

.sidebar-link-list li a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.sidebar-link-list li a:hover {
  background: var(--primary-light);
  color: var(--primary);
  transform: translateX(4px);
}

.sidebar-link-list li a i { width: 20px; text-align: center; color: var(--primary); font-size: 13px; }

.sidebar-quote {
  background: linear-gradient(135deg, #0c1427, #182642);
  color: #fff;
  padding: 28px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.sidebar-quote::before {
  content: '\201C';
  position: absolute;
  top: -30px;
  right: 0px;
  font-size: 130px;
  font-family: Georgia, serif;
  color: rgba(255, 255, 255, 0.06);
  line-height: 1;
}

.sidebar-quote h4 { color: #fff; font-size: 17px; margin-bottom: 14px; }
.sidebar-quote p { color: rgba(255, 255, 255, 0.7); font-size: 14px; line-height: 1.9; margin-bottom: 20px; }

.sidebar-cta {
  background: linear-gradient(135deg, var(--primary) 0%, #5b3de8 100%);
  color: #fff;
  padding: 32px 28px;
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.sidebar-cta::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -30px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.sidebar-cta h4 { color: #fff; font-size: 18px; margin-bottom: 10px; }
.sidebar-cta p { color: rgba(255, 255, 255, 0.8); font-size: 14px; line-height: 1.8; margin-bottom: 20px; }

.sidebar-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.stats-mini-card {
  background: var(--bg-light);
  padding: 16px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  text-align: center;
  transition: var(--transition);
}

.stats-mini-card:hover { border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.stats-mini-card .num { font-size: 22px; font-weight: 900; color: var(--primary); line-height: 1.3; }
.stats-mini-card .label { font-size: 12px; color: var(--text-weak); margin-top: 4px; }

/* ===== Related / CTA sections ===== */
.related-section { padding: 4.5rem 0; background: #fff; }

.section-head { margin-bottom: 40px; }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}

.section-head h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 900; margin-bottom: 10px; letter-spacing: -0.5px; }
.section-head p { color: var(--text-weak); font-size: 16px; max-width: 640px; }

.related-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.related-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: transparent; background: #fff; }

.related-card .meta-row { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-weak); }
.related-card .meta-row .dot { width: 4px; height: 4px; background: #c8d0dc; border-radius: 50%; }
.related-card h3 { font-size: 18px; line-height: 1.5; color: var(--dark); margin: 0; }
.related-card a { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-size: 14px; font-weight: 600; }
.related-card a:hover { color: var(--primary-dark); text-decoration: none; gap: 10px; }
.related-card a i { font-size: 12px; }

.article-cta-band {
  background: linear-gradient(135deg, #0c1427 0%, #121e33 60%, #1e5eff 130%);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.article-cta-band::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 30%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(30,94,255,0.3), transparent 70%);
  border-radius: 50%;
}

.article-cta-band::after {
  content: '';
  position: absolute;
  bottom: -60px;
  right: 10%;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(0,194,168,0.2), transparent 70%);
  border-radius: 50%;
}

.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; position: relative; z-index: 2; }

.cta-text h2 { color: #fff; font-size: clamp(24px, 3.5vw, 36px); font-weight: 900; margin-bottom: 14px; }
.cta-text p { color: rgba(255, 255, 255, 0.7); font-size: 16px; line-height: 1.8; max-width: 560px; }

.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== Footer ===== */
.site-footer { background: #0c1427; color: #94a3b8; font-size: 14px; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 44px;
  padding: 70px 0 50px;
}

.footer-brand { display: flex; flex-direction: column; gap: 18px; }
.footer-brand .brand { margin-bottom: 0; }
.footer-brand .brand-text { color: #fff; }
.footer-brand .brand-text strong { color: #6b8cff; }
.footer-brand p { color: #94a3b8; line-height: 1.9; font-size: 14px; }

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 22px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 12px; }

.footer-col ul li a { color: #94a3b8; transition: var(--transition); display: inline-flex; align-items: center; gap: 6px; }
.footer-col ul li a:hover { color: #fff; padding-left: 6px; }
.footer-col ul li a::before { content: '›'; color: var(--primary); font-size: 15px; }

.footer-contact p { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; line-height: 1.8; color: #94a3b8; }
.footer-contact p i { color: var(--primary); width: 18px; text-align: center; margin-top: 4px; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 22px 0;
  font-size: 13px;
  text-align: center;
  color: #64748b;
}

.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .container { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .sidebar-cta, .sidebar-quote { grid-column: span 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

@media screen and (max-width: 768px) {
  :root { --space: 4rem; }
  
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-actions .btn-primary { display: none; }
  .article-body-inner { padding: 28px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding: 50px 0 40px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .hero-meta { gap: 12px; }
}

@media screen and (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-hero { padding: 3.2rem 0 2.2rem; }
  .article-body-inner { padding: 24px 20px; }
  .article-body-inner h2 { font-size: 21px; }
  .article-body-inner p { font-size: 15px; line-height: 1.85; }
  .article-body-inner .article-lead { font-size: 16px; padding: 14px 16px; }
  .footer-contact { padding-bottom: 10px; }
  .brand-text { font-size: 17px; }
  .nav-panel { padding: 12px 0; }
  .cta-actions .btn { width: 100%; }
}

@media screen and (max-width: 360px) {
  .brand-icon { width: 38px; height: 38px; font-size: 17px; }
  .brand-text { font-size: 15px; }
  .article-hero h1 { font-size: 24px; }
}

/* roulang page: category1 */
:root {
  --primary: #0e7490;
  --primary-dark: #155e75;
  --primary-light: #ecfeff;
  --secondary: #f59e0b;
  --secondary-light: #fef3c7;
  --bg: #f8fafc;
  --bg-white: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --footer-bg: #0f172a;
  --footer-text: #94a3b8;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  --shadow-hover: 0 16px 40px rgba(15, 23, 42, 0.14);
  --transition: 0.3s ease;
  --content-width: 1200px;
  --space-lg: 100px;
  --space-md: 72px;
  --space-sm: 48px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
  height: auto;
}

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}

p {
  margin: 0 0 1em;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 14px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(14, 116, 144, 0.28);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline:hover, .btn-outline:focus-visible {
  background: var(--primary-light);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
  transform: translateY(-2px);
}

.btn-light {
  background: #fff;
  color: var(--primary-dark);
  border-color: #fff;
}

.btn-light:hover, .btn-light:focus-visible {
  background: var(--secondary);
  border-color: var(--secondary);
  color: #fff;
  transform: translateY(-2px);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(6px);
}

.badge-secondary {
  background: var(--secondary-light);
  color: #b45309;
  border-color: #fcd34d;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 10px 0;
}

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

.brand-icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--secondary), #f97316);
  color: #fff;
  border-radius: 12px;
  font-size: 18px;
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.35);
}

.brand-text {
  font-size: 18px;
  font-weight: 500;
  color: #f1f5f9;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.brand-text strong {
  color: #fff;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
  flex-wrap: wrap;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: #cbd5e1;
  transition: all var(--transition);
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(14, 116, 144, 0.35);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--secondary);
}

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  padding: 120px 0 100px;
  background-size: cover;
  background-position: center;
  color: #fff;
  isolation: isolate;
}

.page-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(2, 6, 23, 0.92), rgba(14, 116, 144, 0.72));
  z-index: -1;
}

.banner-inner {
  max-width: 740px;
  padding: 24px 0 8px;
}

.banner-inner .badge {
  margin-bottom: 20px;
}

.banner-inner h1 {
  font-size: clamp(30px, 5vw, 44px);
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.banner-inner p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 28px;
  line-height: 1.8;
}

.banner-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
}

.banner-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ===== Section Common ===== */
.section {
  padding: var(--space-lg) 0;
}

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

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}

.section-kicker {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(26px, 3.6vw, 36px);
  margin-bottom: 12px;
}

.section-head p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 0;
}

/* ===== News Grid ===== */
.news-section {
  background: var(--bg);
}

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

.news-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

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

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

.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.72);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.card-body h3 {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 12px;
  transition: color var(--transition);
}

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

.card-body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
}

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

.card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.card-meta i {
  color: var(--primary);
}

/* ===== Stats ===== */
.stats-section {
  background: linear-gradient(135deg, #0f172a 0%, #0e7490 100%);
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}

.stat-icon {
  font-size: 28px;
  color: var(--secondary);
  margin-bottom: 14px;
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-number small {
  font-size: 18px;
  font-weight: 600;
  margin-left: 2px;
  opacity: 0.85;
}

.stat-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

/* ===== Topics ===== */
.topics-section {
  background: var(--bg-white);
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.topic-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 16px 20px;
  text-align: center;
  transition: all var(--transition);
}

.topic-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
  background: var(--primary-light);
}

.topic-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 16px;
  font-size: 24px;
  color: var(--primary);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
}

.topic-card h3 {
  font-size: 15px;
  margin-bottom: 4px;
}

.topic-card p {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 0;
}

/* ===== Featured ===== */
.featured-section {
  background: var(--bg);
}

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

.featured-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

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

.featured-media {
  position: relative;
  aspect-ratio: 21 / 9;
  overflow: hidden;
}

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

.featured-card:hover .featured-media img {
  transform: scale(1.04);
}

.featured-body {
  padding: 32px;
}

.featured-body .badge-secondary {
  margin-bottom: 14px;
}

.featured-body h3 {
  font-size: 22px;
  margin-bottom: 10px;
}

.featured-body p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 18px;
}

.featured-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--primary);
  font-size: 14px;
}

.featured-link i {
  transition: transform var(--transition);
}

.featured-link:hover i {
  transform: translateX(5px);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-white);
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.faq-q {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.faq-q i {
  color: var(--primary);
  font-size: 16px;
  flex-shrink: 0;
}

.faq-a {
  margin: 12px 0 0 32px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

.faq-a p:last-child {
  margin-bottom: 0;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
  background: var(--footer-bg);
}

.cta-box {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-radius: 24px;
  padding: 56px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
  box-shadow: 0 20px 60px rgba(14, 116, 144, 0.35);
}

.cta-content h2 {
  color: #fff;
  font-size: 28px;
  margin-bottom: 10px;
}

.cta-content p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 0;
  font-size: 16px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding: 64px 0 48px;
}

.footer-brand .brand-text {
  color: #f1f5f9;
  font-size: 17px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin: 18px 0 0;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 18px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

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

.footer-col ul a {
  font-size: 14px;
  color: var(--footer-text);
  transition: color var(--transition);
}

.footer-col ul a:hover {
  color: var(--secondary);
}

.footer-contact p {
  font-size: 14px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-contact i {
  color: var(--secondary);
  width: 18px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

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

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

/* ===== Focus & Active States ===== */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--secondary);
  outline-offset: 2px;
}

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

  .topics-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 768px) {
  :root {
    --space-lg: 64px;
    --space-md: 48px;
    --space-sm: 36px;
  }

  .nav-panel {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    background: rgba(15, 23, 42, 0.98);
    border-radius: 16px;
    padding: 16px;
    margin: 8px 0 0;
  }

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

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

  .nav-toggle {
    display: inline-flex;
  }

  .nav-actions .btn {
    display: none;
  }

  .page-banner {
    padding: 80px 0 64px;
  }

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

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

  .cta-box {
    padding: 40px 28px;
    flex-direction: column;
    text-align: center;
  }

  .cta-box .btn {
    width: 100%;
  }
}

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

  .brand-text {
    font-size: 16px;
  }

  .brand-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

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

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

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

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

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

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

  .card-body h3 {
    font-size: 17px;
  }

  .featured-body h3 {
    font-size: 19px;
  }

  .faq-q {
    font-size: 15px;
  }
}