/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --accent: #f59e0b;
  --accent-dark: #b45309;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --body-bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow: 0 4px 6px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.08);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--body-bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
.container {
  max-width: 1200px;
  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;
  transition: all 0.25s ease;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
  background: transparent;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}
.btn-light {
  background: #fff;
  color: var(--primary-dark);
}
.btn-light:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 600;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 10px;
  font-size: 16px;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}
.brand-text {
  font-size: 20px;
  letter-spacing: 0.5px;
  color: var(--text);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-link {
  position: relative;
  font-weight: 600;
  color: var(--text-muted);
  padding: 8px 2px;
  transition: color 0.2s;
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s;
}
.nav-link:hover {
  color: var(--text);
}
.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--primary);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-size: 18px;
  transition: background 0.2s;
}
.nav-toggle:hover {
  background: var(--primary-light);
}
.header-cta {
  padding: 10px 22px;
  font-size: 14px;
}

.hero {
  position: relative;
  padding: 120px 0 100px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 64, 175, 0.85)), url("/assets/images/backpic/back-1.png") center center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(245, 158, 11, 0.18), transparent 60%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 740px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  font-size: 14px;
  margin-bottom: 28px;
  backdrop-filter: blur(6px);
}
.hero-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 20px;
}
.hero-title span {
  color: var(--accent);
}
.hero-text {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  max-width: 600px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 64px;
}
.hero-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}
.hero-metric-num {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
}
.hero-metric-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-top: 4px;
}

.stats-section {
  padding: 48px 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.stat-item {
  text-align: center;
}
.stat-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 20px;
}
.stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.section {
  padding: var(--space-6) 0;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 8px 20px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.section-title {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.feature-img {
  height: 220px;
  overflow: hidden;
}
.feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.feature-card:hover .feature-img img {
  transform: scale(1.05);
}
.feature-body {
  padding: 28px;
}
.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 12px;
  font-size: 20px;
  margin-bottom: 16px;
}
.feature-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}
.feature-body p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
}

.showcase-section {
  background: var(--dark);
  color: #fff;
  padding: var(--space-6) 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1e40af 100%);
}
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.showcase-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.3);
}
.showcase-media img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}
.showcase-content {
  padding: 20px 0;
}
.showcase-content .section-tag {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent);
}
.showcase-content h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.3;
}
.showcase-content p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 24px;
}
.showcase-list {
  list-style: none;
  margin-top: 8px;
}
.showcase-list li {
  position: relative;
  padding: 12px 0;
  padding-left: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 16px;
  color: rgba(255, 255, 255, 0.9);
}
.showcase-list li:last-child {
  border-bottom: none;
}
.showcase-list li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 12px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 158, 11, 0.2);
  color: var(--accent);
  border-radius: 50%;
  font-size: 12px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 340px;
  display: flex;
  align-items: flex-end;
  box-shadow: var(--shadow);
  transition: transform 0.3s, box-shadow 0.3s;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.category-cover {
  position: absolute;
  inset: 0;
}
.category-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.category-card:hover .category-cover img {
  transform: scale(1.05);
}
.category-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.55) 60%, rgba(15, 23, 42, 0.85) 100%);
}
.category-info {
  position: relative;
  z-index: 2;
  padding: 32px;
  color: #fff;
  width: 100%;
}
.category-name {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 8px;
}
.category-desc {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 20px;
  max-width: 400px;
}
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  backdrop-filter: blur(6px);
  transition: background 0.2s, transform 0.2s;
}
.category-link:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateX(4px);
}
.category-card:nth-child(2) .category-link {
  background: rgba(245, 158, 11, 0.25);
  border-color: rgba(245, 158, 11, 0.4);
}

.news-section {
  background: var(--body-bg);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.news-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s, box-shadow 0.25s;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.news-meta .badge {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 4px 12px;
  font-size: 12px;
}
.news-meta time {
  font-size: 13px;
  color: var(--text-muted);
}
.news-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}
.news-title a {
  color: var(--text);
  transition: color 0.2s;
}
.news-title a:hover {
  color: var(--primary);
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s;
}
.news-link:hover {
  gap: 14px;
}
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
  font-size: 16px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}

.steps-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.step-item {
  position: relative;
  text-align: center;
  padding: 32px 20px;
  background: var(--body-bg);
  border-radius: var(--radius-lg);
  transition: transform 0.25s, box-shadow 0.25s;
}
.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.step-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  border-radius: 16px;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.28);
}
.step-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-section {
  background: var(--body-bg);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.25s, border-color 0.25s;
}
.faq-item:hover {
  box-shadow: var(--shadow);
  border-color: var(--primary-light);
}
.faq-item summary {
  cursor: pointer;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  color: var(--text-muted);
  transition: transform 0.25s;
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
}
.faq-item[open] summary {
  color: var(--primary);
}
.faq-answer {
  padding: 0 28px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

.cta-section {
  position: relative;
  padding: var(--space-6) 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(30, 64, 175, 0.85)), url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
  color: #fff;
  text-align: center;
}
.cta-inner {
  max-width: 700px;
  margin: 0 auto;
}
.cta-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-text {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 36px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 72px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .brand-text {
  color: #fff;
}
.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}
.footer-title {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s, padding-left 0.2s;
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 6px;
}
.footer-contact {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact i {
  width: 18px;
  color: var(--accent);
  text-align: center;
}
.footer-bottom {
  padding-top: 32px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

@media (max-width: 1024px) {
  .hero-title {
    font-size: 40px;
  }
  .feature-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .step-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .header-inner {
    height: 64px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    gap: 0;
    padding: 16px 20px 20px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    align-items: stretch;
  }
  .main-nav.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 14px 8px;
    border-radius: 8px;
  }
  .nav-link:hover {
    background: var(--primary-light);
  }
  .nav-link::after {
    display: none;
  }
  .header-cta {
    display: none;
  }
  .hero {
    padding: 80px 0 64px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-text {
    font-size: 16px;
  }
  .hero-metrics {
    gap: 24px;
  }
  .hero-metric-num {
    font-size: 24px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .section {
    padding: 56px 0;
  }
  .section-title {
    font-size: 28px;
  }
  .category-grid {
    grid-template-columns: 1fr;
  }
  .showcase-content h2 {
    font-size: 26px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-title {
    font-size: 28px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .hero-title {
    font-size: 26px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-metrics {
    gap: 20px;
    flex-direction: column;
  }
  .feature-grid,
  .news-grid,
  .step-grid {
    grid-template-columns: 1fr;
  }
  .section-header {
    margin-bottom: 36px;
  }
  .section-title {
    font-size: 24px;
  }
  .feature-img {
    height: 180px;
  }
  .showcase-media img {
    height: 240px;
  }
  .footer-bottom {
    line-height: 1.8;
  }
}

/* roulang page: article */
:root {
  --primary: #6c4af2;
  --primary-dark: #5133c9;
  --primary-light: #eef0ff;
  --secondary: #ff7849;
  --secondary-light: #fff4ef;
  --bg: #ffffff;
  --bg-alt: #f6f7fd;
  --bg-deep: #17152b;
  --text: #1d1b2e;
  --text-weak: #6f6c85;
  --border: #eceaf3;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 10px 35px rgba(30, 20, 70, 0.08);
  --shadow-hover: 0 18px 50px rgba(30, 20, 70, 0.15);
  --space: 80px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; background: var(--bg); color: var(--text); line-height: 1.75; font-size: 16px; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

/* ===== Header / Nav ===== */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark { background: linear-gradient(135deg, var(--primary), #9a7cff); color: #fff; border-radius: 12px; font-weight: 800; font-size: 16px; width: 38px; height: 38px; display: flex; align-items: center; justify-content: center; letter-spacing: -0.5px; box-shadow: 0 6px 18px rgba(108, 74, 242, 0.3); }
.brand-text { font-size: 20px; font-weight: 800; letter-spacing: -0.5px; color: var(--text); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav .nav-link { padding: 8px 20px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--text-weak); transition: all 0.25s ease; white-space: nowrap; }
.main-nav .nav-link:hover { color: var(--primary); background: var(--primary-light); }
.main-nav .nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.header-cta { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; border-radius: 999px; font-weight: 600; font-size: 14px; color: #fff; background: linear-gradient(135deg, var(--primary), #9a7cff); box-shadow: 0 6px 20px rgba(108, 74, 242, 0.28); transition: all 0.25s ease; white-space: nowrap; }
.header-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(108, 74, 242, 0.35); }
.nav-toggle { display: none; background: none; font-size: 22px; color: var(--text); width: 42px; height: 42px; border-radius: 10px; flex-shrink: 0; cursor: pointer; }
.nav-toggle:hover { background: var(--primary-light); color: var(--primary); }

/* ===== Article Banner ===== */
.article-banner { position: relative; padding: 90px 0 60px; background: linear-gradient(135deg, #17152b 0%, #2a2350 60%, #3c2c72 100%); overflow: hidden; }
.article-banner::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; opacity: 0.18; mix-blend-mode: overlay; }
.article-banner .container { position: relative; z-index: 2; }
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.7); margin-bottom: 24px; flex-wrap: wrap; }
.breadcrumb a { color: rgba(255,255,255,0.85); transition: color 0.2s; }
.breadcrumb a:hover { color: #fff; }
.breadcrumb i { font-size: 12px; opacity: 0.5; }
.breadcrumb .current { color: #c7b9ff; }
.article-category { display: inline-block; background: rgba(108, 74, 242, 0.3); border: 1px solid rgba(160, 140, 255, 0.4); color: #d8ccff; padding: 6px 18px; border-radius: 999px; font-size: 13px; font-weight: 500; letter-spacing: 1px; margin-bottom: 18px; }
.article-banner h1 { font-size: clamp(30px, 4.5vw, 48px); color: #fff; font-weight: 800; line-height: 1.3; letter-spacing: -1px; margin-bottom: 20px; max-width: 880px; }
.article-banner p { color: rgba(255,255,255,0.8); font-size: 17px; max-width: 760px; line-height: 1.8; }
.article-meta { display: flex; align-items: center; gap: 24px; margin-top: 32px; flex-wrap: wrap; color: rgba(255,255,255,0.75); font-size: 14px; }
.article-meta span { display: flex; align-items: center; gap: 8px; }
.article-meta i { color: #9a7cff; }

/* ===== Article Content ===== */
.article-main { padding: 80px 0 60px; background: var(--bg); }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 60px; align-items: start; }
.article-body { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 48px; box-shadow: var(--shadow); }
.article-body > * + * { margin-top: 1.6em; }
.article-body h2 { font-size: 26px; font-weight: 800; letter-spacing: -0.5px; margin-top: 2em; padding-bottom: 10px; border-bottom: 2px solid var(--primary-light); color: var(--text); }
.article-body h3 { font-size: 20px; font-weight: 700; margin-top: 1.8em; color: var(--primary-dark); }
.article-body p { color: #44415a; font-size: 16px; line-height: 1.9; }
.article-body ul, .article-body ol { padding-left: 22px; margin: 1.4em 0; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { color: #44415a; margin-bottom: 10px; line-height: 1.8; }
.article-body img { border-radius: 14px; margin: 2em 0; box-shadow: var(--shadow); }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--primary-light); padding: 18px 24px; border-radius: 0 12px 12px 0; color: #514e6a; font-size: 15px; margin: 1.8em 0; }
.article-body a { color: var(--primary); border-bottom: 1px solid var(--primary); transition: all 0.2s; }
.article-body a:hover { color: var(--primary-dark); border-bottom-color: var(--primary-dark); }
.article-body table { width: 100%; border-collapse: collapse; margin: 2em 0; }
.article-body table th { background: var(--primary-light); color: var(--text); padding: 12px 16px; font-weight: 600; text-align: left; border-bottom: 2px solid rgba(108,74,242,0.2); }
.article-body table td { padding: 12px 16px; border-bottom: 1px solid var(--border); color: #44415a; }

.article-empty { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 70px 40px; text-align: center; box-shadow: var(--shadow); }
.article-empty i { font-size: 48px; color: var(--primary); opacity: 0.5; margin-bottom: 20px; }
.article-empty h2 { font-size: 26px; margin-bottom: 16px; }
.article-empty p { color: var(--text-weak); margin-bottom: 28px; }

/* ===== Sidebar ===== */
.sidebar { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 28px; }
.sidebar-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.sidebar-title { font-size: 17px; font-weight: 700; margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--primary-light); color: var(--text); display: flex; align-items: center; gap: 10px; }
.sidebar-title i { color: var(--primary); }
.sidebar-cover { border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 18px; }
.sidebar-cover img { width: 100%; height: 160px; object-fit: cover; transition: transform 0.4s ease; }
.sidebar-cover:hover img { transform: scale(1.04); }
.sidebar-card p { font-size: 14px; color: var(--text-weak); line-height: 1.8; }
.sidebar-list li { border-bottom: 1px dashed var(--border); padding: 10px 0; font-size: 14px; display: flex; align-items: center; gap: 10px; }
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list li i { color: var(--primary); font-size: 12px; opacity: 0.7; }
.sidebar-list a { color: #44415a; transition: color 0.2s; line-height: 1.5; }
.sidebar-list a:hover { color: var(--primary); }
.sidebar-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.sidebar-tags a { display: inline-block; background: var(--bg-alt); border: 1px solid var(--border); border-radius: 999px; padding: 6px 16px; font-size: 13px; color: var(--text-weak); transition: all 0.25s; }
.sidebar-tags a:hover { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== CTA ===== */
.article-cta { padding: 70px 0 40px; background: var(--bg-alt); }
.cta-box { position: relative; background: linear-gradient(135deg, #1d1a3e 0%, #322a63 55%, #472e8a 100%); border-radius: 24px; padding: 60px 70px; overflow: hidden; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-box::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center/cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
.cta-box::after { content: ''; position: absolute; width: 300px; height: 300px; border-radius: 50%; background: rgba(108, 74, 242, 0.35); filter: blur(60px); right: -80px; top: -80px; }
.cta-content { position: relative; z-index: 2; }
.cta-content h2 { color: #fff; font-size: clamp(24px, 3vw, 32px); font-weight: 800; margin-bottom: 12px; letter-spacing: -0.5px; }
.cta-content p { color: rgba(255,255,255,0.85); font-size: 16px; max-width: 560px; }
.cta-buttons { position: relative; z-index: 2; display: flex; flex-direction: column; gap: 14px; flex-shrink: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: 999px; font-weight: 600; font-size: 15px; transition: all 0.25s ease; white-space: nowrap; }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0,0,0,0.2); }
.btn-outline-light { border: 2px solid rgba(255,255,255,0.5); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,0.15); transform: translateY(-2px); }

/* ===== Related ===== */
.related-section { padding: 60px 0 80px; background: var(--bg-alt); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.related-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: all 0.3s ease; }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.related-card .cover { height: 180px; overflow: hidden; }
.related-card .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .cover img { transform: scale(1.06); }
.related-card .info { padding: 20px 24px 24px; }
.related-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; line-height: 1.5; }
.related-card h3 a { transition: color 0.2s; }
.related-card h3 a:hover { color: var(--primary); }
.related-card p { font-size: 13px; color: var(--text-weak); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== Footer ===== */
.site-footer { background: var(--bg-deep); color: rgba(255,255,255,0.8); padding: 70px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 50px; margin-bottom: 50px; }
.footer-brand .brand { margin-bottom: 20px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.9; color: rgba(255,255,255,0.6); max-width: 360px; }
.footer-title { color: #fff; font-size: 16px; margin-bottom: 20px; font-weight: 700; }
.footer-links li, .footer-contact li { padding: 6px 0; font-size: 14px; }
.footer-links a { color: rgba(255,255,255,0.65); transition: all 0.2s; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.65); }
.footer-contact i { color: var(--primary); width: 18px; text-align: center; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 28px; text-align: center; font-size: 13px; color: rgba(255,255,255,0.45); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; gap: 40px; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-card { flex: 1 1 calc(50% - 14px); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-box { padding: 45px 40px; flex-direction: column; text-align: center; }
  .cta-content p { margin: 0 auto; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  :root { --space: 50px; }
  .header-inner { height: 64px; }
  .brand-text { font-size: 18px; }
  .main-nav { position: fixed; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); box-shadow: 0 20px 40px rgba(0,0,0,0.08); flex-direction: column; align-items: stretch; padding: 16px 24px; gap: 8px; transform: translateY(-120%); opacity: 0; visibility: hidden; transition: all 0.35s ease; z-index: 99; }
  .main-nav.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .main-nav .nav-link { padding: 14px 18px; border-radius: 10px; }
  .header-cta { display: none; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; }
  .article-banner { padding: 60px 0 44px; }
  .article-body { padding: 30px 24px; }
  .article-body h2 { font-size: 22px; }
  .article-body h3 { font-size: 18px; }
  .article-banner p { font-size: 15px; }
  .article-meta { gap: 14px; }
  .sidebar { flex-direction: column; }
  .sidebar-card { flex: 1 1 100%; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .cta-box { padding: 40px 28px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .brand-mark { width: 34px; height: 34px; font-size: 14px; border-radius: 10px; }
  .brand-text { font-size: 16px; }
  .article-banner h1 { font-size: 26px; }
  .article-body { padding: 24px 18px; }
  .sidebar-card { padding: 22px; }
  .related-card .cover { height: 200px; }
  .footer-grid { gap: 30px; }
}

/* roulang page: category1 */
:root {
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --primary-light: #eef2ff;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --dark-bg: #0f172a;
  --light-bg: #f1f5f9;
  --surface: #ffffff;
  --text: #1e293b;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --radius: 18px;
  --radius-sm: 10px;
  --shadow: 0 6px 24px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 18px 48px rgba(15, 23, 42, 0.12);
  --space: 88px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px; line-height: 1.75; color: var(--text);
  background: var(--light-bg); -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 17px; letter-spacing: 0.5px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}
.brand-text { font-size: 20px; font-weight: 800; color: var(--text); letter-spacing: 0.5px; }
.main-nav { display: flex; align-items: center; gap: 8px; }
.nav-link {
  position: relative; padding: 8px 18px; border-radius: 999px;
  font-size: 15px; font-weight: 500; color: var(--text-weak);
  transition: all 0.25s ease;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 700; }
.nav-link.active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px;
  transform: translateX(-50%); width: 18px; height: 3px;
  background: var(--primary); border-radius: 4px;
}
.header-cta { flex-shrink: 0; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 24px; border-radius: 999px;
  font-size: 15px; font-weight: 600; transition: all 0.25s ease;
}
.btn i { font-size: 14px; }
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35); }
.btn-outline {
  border: 2px solid var(--border); color: var(--text); background: transparent;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }
.btn-accent {
  background: var(--accent); color: #fff;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
}
.btn-accent:hover { background: #d97706; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35); }
.nav-toggle { display: none; font-size: 24px; color: var(--text); padding: 8px; }

.page-banner {
  position: relative; min-height: 420px;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  display: flex; align-items: center;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.72) 55%, rgba(15, 23, 42, 0.3) 100%);
}
.banner-content { position: relative; z-index: 2; max-width: 640px; padding: 60px 0; }
.banner-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, 0.18); border: 1px solid rgba(255, 255, 255, 0.25);
  color: #fff; padding: 6px 18px; border-radius: 999px;
  font-size: 13px; font-weight: 500; backdrop-filter: blur(6px);
  margin-bottom: 20px;
}
.banner-title {
  font-size: 44px; line-height: 1.25; font-weight: 800; color: #fff;
  margin-bottom: 16px; letter-spacing: 1px;
}
.banner-title span { color: var(--accent); }
.banner-desc { font-size: 17px; color: rgba(255, 255, 255, 0.85); line-height: 1.8; margin-bottom: 28px; }
.banner-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.section { padding: var(--space) 0; position: relative; }
.section-alt { background: var(--surface); }
.section-head { text-align: center; max-width: 700px; margin: 0 auto 52px; }
.section-eyebrow {
  display: inline-block; color: var(--primary); font-size: 13px; font-weight: 700;
  letter-spacing: 2px; text-transform: uppercase; background: var(--primary-light);
  padding: 4px 16px; border-radius: 999px; margin-bottom: 12px;
}
.section-title { font-size: 32px; font-weight: 800; color: var(--text); line-height: 1.4; letter-spacing: 0.5px; }
.section-subtitle { font-size: 15px; color: var(--text-weak); margin-top: 12px; line-height: 1.8; }

.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.feature-card {
  background: var(--surface); border-radius: var(--radius);
  padding: 36px 30px; border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0; transition: opacity 0.3s ease;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 58px; height: 58px; border-radius: 14px;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 16px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-weak); line-height: 1.75; }

.guide-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px;
}
.guide-card {
  display: flex; background: var(--surface); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.guide-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.guide-thumb { width: 45%; position: relative; overflow: hidden; }
.guide-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.guide-card:hover .guide-thumb img { transform: scale(1.05); }
.guide-thumb::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent 60%);
}
.guide-body { flex: 1; padding: 28px 26px; display: flex; flex-direction: column; }
.guide-cat {
  align-self: flex-start; font-size: 12px; font-weight: 700;
  color: var(--primary); background: var(--primary-light);
  padding: 3px 14px; border-radius: 999px; margin-bottom: 14px;
}
.guide-body h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; line-height: 1.5; }
.guide-body p { font-size: 14px; color: var(--text-weak); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.guide-meta {
  display: flex; align-items: center; gap: 16px;
  font-size: 13px; color: var(--text-weak);
  border-top: 1px solid var(--border); padding-top: 14px;
}
.guide-meta i { font-size: 14px; color: var(--primary); }
.guide-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--primary); font-weight: 600; font-size: 14px;
  margin-top: 10px; transition: gap 0.25s ease;
}
.guide-link:hover { gap: 12px; }

.process-section {
  background: var(--dark-bg); color: #fff;
}
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.process-item { position: relative; text-align: center; padding: 36px 20px; border-radius: var(--radius); background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.1); }
.process-item::after {
  content: "\f054"; font-family: "Font Awesome 6 Free"; font-weight: 900;
  position: absolute; top: 50%; right: -22px; transform: translateY(-50%);
  color: var(--accent); font-size: 14px; z-index: 2;
}
.process-item:last-child::after { display: none; }
.process-num {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: var(--dark-bg);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px; margin: 0 auto 18px;
}
.process-item h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.process-item p { font-size: 13px; color: rgba(255, 255, 255, 0.7); line-height: 1.7; }

.stats-section { background: var(--surface); }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px;
  padding: 48px 40px; border-radius: var(--radius);
  border: 1px solid var(--border); box-shadow: var(--shadow);
}
.stat-item { text-align: center; }
.stat-num { font-size: 42px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-num small { font-size: 18px; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 14px; color: var(--text-weak); margin-top: 6px; }

.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-sm); margin-bottom: 14px;
  overflow: hidden; transition: box-shadow 0.3s ease;
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-q {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 26px; cursor: pointer; font-size: 16px; font-weight: 600;
  transition: color 0.2s ease;
}
.faq-q:hover { color: var(--primary); }
.faq-q i { color: var(--primary); transition: transform 0.3s ease; font-size: 14px; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-a-inner { padding: 0 26px 20px; font-size: 14px; color: var(--text-weak); line-height: 1.8; }
.faq-item.active { box-shadow: var(--shadow); border-color: var(--primary-light); }
.faq-item.active .faq-q i { transform: rotate(180deg); }
.faq-item.active .faq-a { max-height: 300px; }

.cta-section { background: var(--light-bg); }
.cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 24px; padding: 64px 48px; text-align: center;
  position: relative; overflow: hidden;
}
.cta-box::before {
  content: ""; position: absolute; top: -80px; right: -80px;
  width: 280px; height: 280px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}
.cta-box::after {
  content: ""; position: absolute; bottom: -100px; left: -60px;
  width: 200px; height: 200px; border-radius: 50%;
  background: rgba(245, 158, 11, 0.15);
}
.cta-box h2 { color: #fff; font-size: 30px; font-weight: 800; margin-bottom: 14px; position: relative; z-index: 2; }
.cta-box p { color: rgba(255, 255, 255, 0.85); font-size: 15px; margin-bottom: 28px; position: relative; z-index: 2; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; position: relative; z-index: 2; }

.site-footer { background: var(--dark-bg); color: rgba(255, 255, 255, 0.75); padding-top: 64px; }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px;
  padding-bottom: 40px;
}
.footer-brand .brand-text { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-top: 16px; max-width: 340px; color: rgba(255, 255, 255, 0.6); }
.footer-title { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: rgba(255, 255, 255, 0.6); font-size: 14px; transition: color 0.2s ease; }
.footer-links a:hover { color: var(--accent); }
.footer-contact { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255, 255, 255, 0.6); }
.footer-contact i { color: var(--accent); font-size: 14px; width: 18px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0; text-align: center;
  font-size: 13px; color: rgba(255, 255, 255, 0.45);
}

@media (max-width: 1024px) {
  :root { --space: 64px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .process-item:nth-child(2)::after { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); padding: 36px 24px; }
  .guide-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; background: #fff; padding: 20px;
    border-bottom: 1px solid var(--border);
    display: none; box-shadow: var(--shadow-lg);
  }
  .main-nav.open { display: flex; }
  .nav-link { width: 100%; text-align: center; padding: 14px; }
  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .banner-title { font-size: 34px; }
  .section-title { font-size: 26px; }
  .guide-card { flex-direction: column; }
  .guide-thumb { width: 100%; height: 200px; }
  .process-grid { grid-template-columns: 1fr; }
  .process-item::after { display: none !important; }
  .cta-box { padding: 48px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  :root { --space: 48px; }
  .banner-title { font-size: 27px; }
  .banner-desc { font-size: 15px; }
  .feature-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .banner-actions .btn { width: 100%; justify-content: center; }
  .cta-actions .btn { width: 100%; justify-content: center; }
}

/* roulang page: category2 */
:root{
  --primary:#7c3aed;
  --primary-dark:#5b21b6;
  --primary-light:#ddd6fe;
  --accent:#f59e0b;
  --bg:#f8f7fc;
  --bg-alt:#ffffff;
  --text:#1e1b2e;
  --text-weak:#6b7280;
  --border:#e5e7eb;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 10px 40px rgba(76,29,149,.08);
  --shadow-hover:0 18px 50px rgba(76,29,149,.16);
  --sp:48px;
  --sp-lg:72px;
  --sp-sm:24px;
  --transition:.3s cubic-bezier(.4,0,.2,1);
  --font:'Inter','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:all var(--transition)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.site-header{
  position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(229,231,235,.6);box-shadow:0 4px 20px rgba(0,0,0,.04);
}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;white-space:nowrap}
.brand-mark{
  width:38px;height:38px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-weight:800;font-size:15px;
  letter-spacing:.5px;box-shadow:0 4px 14px rgba(124,58,237,.35);transition:var(--transition);
}
.brand:hover .brand-mark{transform:rotate(-6deg) scale(1.05);box-shadow:0 6px 20px rgba(124,58,237,.45)}
.brand-text{font-weight:700;font-size:1.15rem;letter-spacing:.5px;color:var(--text)}
.main-nav{display:flex;align-items:center;gap:6px;margin:0 auto}
.main-nav .nav-link{
  padding:9px 20px;border-radius:999px;font-size:.925rem;font-weight:500;color:var(--text-weak);
  transition:all var(--transition);position:relative;line-height:1.4;
}
.main-nav .nav-link:hover{color:var(--primary);background:var(--primary-light)}
.main-nav .nav-link.active{color:var(--primary);background:var(--primary-light);font-weight:600}
.header-cta{
  flex-shrink:0;display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:999px;
  background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;font-weight:600;font-size:.875rem;
  box-shadow:0 4px 18px rgba(124,58,237,.3);transition:var(--transition);
}
.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(124,58,237,.4)}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);font-size:1.2rem;align-items:center;justify-content:center}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;
  border-radius:999px;font-weight:600;font-size:.925rem;transition:var(--transition);border:1px solid transparent;line-height:1.4;
}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;box-shadow:0 4px 18px rgba(124,58,237,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(124,58,237,.42)}
.btn-outline{background:transparent;border-color:var(--border);color:var(--text);border-width:2px}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:rgba(124,58,237,.04)}
.btn-light{background:#fff;color:var(--primary);box-shadow:0 4px 20px rgba(0,0,0,.12)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(0,0,0,.18)}

.page-hero{
  position:relative;overflow:hidden;padding:76px 0 64px;color:#fff;background:#1e1b2e;
}
.page-hero::before{
  content:'';position:absolute;inset:0;background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;opacity:.35;
}
.page-hero::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(30,27,46,.6) 0%,rgba(30,27,46,.85) 100%);
}
.page-hero-inner{position:relative;z-index:2;text-align:center;max-width:800px}
.page-hero .breadcrumb{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);padding:6px 18px;border-radius:999px;font-size:.8rem;color:#e2e2e2;margin-bottom:18px;backdrop-filter:blur(8px)}
.page-hero .breadcrumb i{font-size:.7rem;color:var(--accent)}
.page-hero h1{font-size:2.6rem;font-weight:800;letter-spacing:1px;line-height:1.25;margin-bottom:14px}
.page-hero h1 span{color:var(--accent)}
.page-hero p{font-size:1.05rem;color:#cfcde0;max-width:640px;margin:0 auto;line-height:1.8}
.hero-tags{display:flex;justify-content:center;gap:12px;margin-top:20px;flex-wrap:wrap}
.tag-chip{
  display:inline-flex;align-items:center;gap:6px;padding:5px 16px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#e6e4f0;font-size:.8rem;backdrop-filter:blur(8px);
}
.tag-chip i{color:var(--accent);font-size:.7rem}

.section{padding:var(--sp-lg) 0}
.section-alt{background:var(--bg-alt)}
.section-header{text-align:center;max-width:680px;margin:0 auto 40px}
.section-eyebrow{
  display:inline-block;font-size:.75rem;font-weight:600;color:var(--primary);background:var(--primary-light);
  padding:4px 14px;border-radius:999px;letter-spacing:1px;margin-bottom:12px;text-transform:uppercase;
}
.section-header h2{font-size:2rem;font-weight:800;color:var(--text);line-height:1.3;margin-bottom:10px}
.section-header p{color:var(--text-weak);font-size:.95rem;line-height:1.7}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:var(--bg-alt);border-radius:var(--radius);padding:32px 28px;border:1px solid var(--border);
  box-shadow:var(--shadow);transition:var(--transition);position:relative;overflow:hidden;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--primary),var(--accent));
  opacity:0;transition:var(--transition);
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:var(--primary-light)}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:56px;height:56px;border-radius:16px;background:var(--primary-light);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:1.4rem;margin-bottom:18px;
  transition:var(--transition);
}
.feature-card:hover .feature-icon{background:var(--primary);color:#fff;transform:scale(1.05)}
.feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:.875rem;color:var(--text-weak);line-height:1.7}

.guide-layout{display:grid;grid-template-columns:1.5fr 1fr;gap:48px;align-items:center;background:var(--bg-alt);border-radius:var(--radius);padding:48px;border:1px solid var(--border);box-shadow:var(--shadow)}
.guide-visual{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:0 16px 40px rgba(0,0,0,.18)}
.guide-visual img{width:100%;height:360px;object-fit:cover}
.guide-visual-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(30,27,46,.7) 0%,transparent 60%);display:flex;align-items:flex-end;padding:24px}
.guide-visual-overlay span{color:#fff;font-weight:600;font-size:1.05rem;display:flex;align-items:center;gap:8px}
.guide-visual-overlay i{color:var(--accent)}
.guide-content h2{font-size:1.6rem;font-weight:800;line-height:1.35;margin-bottom:12px}
.guide-content h2 span{display:inline-block;color:var(--primary);border-bottom:2px solid var(--primary-light)}
.guide-content p{color:var(--text-weak);font-size:.9rem;line-height:1.8;margin-bottom:16px}
.guide-list{display:flex;flex-direction:column;gap:12px;margin:18px 0 24px}
.guide-list li{display:flex;gap:10px;align-items:flex-start;font-size:.875rem;color:var(--text)}
.guide-list i{color:var(--primary);margin-top:3px;font-size:.8rem}

.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:12px}
.step-card{
  background:var(--bg-alt);border-radius:var(--radius);padding:28px 22px;border:1px solid var(--border);
  transition:var(--transition);position:relative;box-shadow:var(--shadow);
}
.step-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.step-num{
  font-size:2.2rem;font-weight:800;color:var(--primary-light);line-height:1;margin-bottom:12px;
  font-family:Georgia,serif;transition:var(--transition);
}
.step-card:hover .step-num{color:var(--primary)}
.step-card h3{font-size:1rem;font-weight:700;margin-bottom:6px}
.step-card p{font-size:.8rem;color:var(--text-weak);line-height:1.6}

.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.content-card{display:flex;gap:20px;background:var(--bg-alt);border-radius:var(--radius);padding:26px;border:1px solid var(--border);box-shadow:var(--shadow);transition:var(--transition)}
.content-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px);border-color:var(--primary-light)}
.content-card-thumb{width:120px;height:120px;border-radius:14px;overflow:hidden;flex-shrink:0;position:relative}
.content-card-thumb img{width:100%;height:100%;object-fit:cover;transition:var(--transition)}
.content-card:hover .content-card-thumb img{transform:scale(1.06)}
.content-card-body{flex:1}
.content-card-body h3{font-size:1.05rem;font-weight:700;margin-bottom:6px;line-height:1.45}
.content-card-body h3 a:hover{color:var(--primary)}
.content-card-body p{font-size:.82rem;color:var(--text-weak);line-height:1.65;margin-bottom:10px}
.card-meta{display:flex;align-items:center;gap:12px;font-size:.73rem;color:var(--text-weak)}
.card-meta i{color:var(--primary)}
.card-badge{
  position:absolute;top:8px;left:8px;background:rgba(124,58,237,.9);color:#fff;font-size:.65rem;
  padding:2px 10px;border-radius:999px;font-weight:600;backdrop-filter:blur(4px);z-index:2;
}

.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tips-card{background:var(--bg-alt);border-radius:var(--radius);padding:28px;border:1px solid var(--border);transition:var(--transition)}
.tips-card:hover{box-shadow:var(--shadow-hover);transform:translateY(-4px)}
.tips-icon{width:48px;height:48px;border-radius:14px;background:rgba(245,158,11,.12);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:1.1rem;margin-bottom:16px}
.tips-card h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.tips-card p{font-size:.83rem;color:var(--text-weak);line-height:1.7}

.faq-section{background:var(--bg-alt)}
.faq-list{max-width:860px;margin:0 auto}
.faq-item{
  background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:0;margin-bottom:12px;
  overflow:hidden;transition:var(--transition);
}
.faq-item:hover{border-color:var(--primary-light)}
.faq-item summary{
  list-style:none;display:flex;align-items:center;justify-content:space-between;cursor:pointer;
  padding:18px 24px;font-weight:600;font-size:.95rem;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .faq-num{color:var(--primary);font-size:.8rem;font-family:Georgia,serif;margin-right:12px;font-weight:700}
.faq-item .faq-icon{width:28px;height:28px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:.7rem;transition:var(--transition);flex-shrink:0}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff}
.faq-item p{padding:0 24px 20px;color:var(--text-weak);font-size:.875rem;line-height:1.8;border-top:1px dashed var(--border);margin:0 20px;padding-left:0;padding-right:0;padding-top:14px}

.cta-section{
  position:relative;overflow:hidden;padding:64px 0;text-align:center;
}
.cta-section::before{
  content:'';position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.png');
  background-size:cover;background-position:center;
}
.cta-section::after{
  content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(124,58,237,.92),rgba(91,33,182,.88));
}
.cta-inner{position:relative;z-index:2;max-width:640px;margin:0 auto;color:#fff}
.cta-inner h2{font-size:2rem;font-weight:800;margin-bottom:12px}
.cta-inner p{font-size:.95rem;color:rgba(255,255,255,.85);margin-bottom:24px}
.cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

.site-footer{
  background:#17142b;color:#a0a0b8;padding:56px 0 0;position:relative;
}
.site-footer::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--accent),var(--primary));
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand .brand{color:#fff;margin-bottom:14px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:.85rem;line-height:1.8;max-width:320px}
.footer-title{
  color:#fff;font-size:.85rem;font-weight:600;margin-bottom:16px;letter-spacing:1px;
  position:relative;padding-bottom:8px;
}
.footer-title::after{content:'';position:absolute;left:0;bottom:0;width:24px;height:2px;background:var(--accent)}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-links a{font-size:.85rem;color:#a0a0b8;transition:var(--transition)}
.footer-links a:hover{color:var(--accent);padding-left:4px}
.footer-contact{display:flex;flex-direction:column;gap:8px}
.footer-contact li{font-size:.85rem;display:flex;align-items:center;gap:10px}
.footer-contact i{color:var(--accent);font-size:.8rem;width:16px}
.footer-bottom{padding:20px 0;text-align:center;font-size:.78rem}
.footer-bottom p{color:#6b6b85}
.footer-bottom a{color:#a0a0b8}
.footer-bottom a:hover{color:var(--accent)}

@media(max-width:1024px){
  .feature-grid,.tips-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  :root{--sp:36px;--sp-lg:52px}
  .container{padding:0 20px}
  .main-nav{
    position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px;
    box-shadow:0 20px 40px rgba(0,0,0,.1);align-items:stretch;gap:4px;
    opacity:0;visibility:hidden;transform:translateY(-12px);transition:var(--transition);border-bottom:1px solid var(--border);
    border-radius:0 0 18px 18px;z-index:999;
  }
  .main-nav.open{opacity:1;visibility:visible;transform:translateY(0)}
  .main-nav .nav-link{padding:14px 20px;border-radius:12px;font-size:.95rem}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .page-hero{padding:56px 0 44px}
  .page-hero h1{font-size:1.9rem}
  .page-hero p{font-size:.92rem}
  .section-header h2{font-size:1.6rem}
  .guide-layout{grid-template-columns:1fr;padding:28px;gap:28px}
  .guide-visual img{height:240px}
  .card-grid{grid-template-columns:1fr}
  .content-card{flex-direction:column}
  .content-card-thumb{width:100%;height:190px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media(max-width:520px){
  .feature-grid,.tips-grid,.steps-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:1.55rem}
  .cta-buttons{flex-direction:column}
  .btn{width:100%}
  .section-header h2{font-size:1.4rem}
  .guide-content h2{font-size:1.3rem}
  .faq-item summary{font-size:.85rem;padding:16px 16px}
  .faq-item p{font-size:.82rem}
}