/* roulang page: index */
:root {
  --bg-primary: #0b1120;
  --bg-secondary: #111a35;
  --bg-card: #151f3d;
  --bg-glass: rgba(10, 15, 30, 0.65);
  --primary: #8b5cf6;
  --primary-dark: #6d28d9;
  --primary-light: #a78bfa;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --cyan: #06b6d4;
  --text-primary: #edf0fc;
  --text-secondary: #a5b0d4;
  --text-muted: #6b7698;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: rgba(255, 255, 255, 0.14);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.15);
  --space-section: 96px;
  --space-section-sm: 64px;
  --container-width: 1200px;
  --nav-height: 72px;
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-base);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  display: block;
}
button,
input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--space-section) 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-header .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-top: 14px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn-lg {
  padding: 18px 42px;
  font-size: 16px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(139, 92, 246, 0.45);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 6px 16px rgba(139, 92, 246, 0.3);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.28);
}
.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
}
.btn-light {
  background: #fff;
  color: #0b1120;
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.15);
}
.btn-light:hover {
  transform: translateY(-2px);
  color: #0b1120;
  box-shadow: 0 12px 32px rgba(255, 255, 255, 0.25);
}
.btn:focus-visible {
  outline: 3px solid rgba(139, 92, 246, 0.5);
  outline-offset: 2px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 100px;
  background: rgba(139, 92, 246, 0.12);
  color: var(--primary-light);
  border: 1px solid rgba(139, 92, 246, 0.2);
  letter-spacing: 0.02em;
}
.badge-warm {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-light);
  border-color: rgba(245, 158, 11, 0.22);
}
.badge-cyan {
  background: rgba(6, 182, 212, 0.12);
  color: #67e8f9;
  border-color: rgba(6, 182, 212, 0.22);
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(10, 15, 30, 0.55);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(8, 12, 24, 0.92);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}
.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  white-space: nowrap;
}
.logo .logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 100px;
  transition: var(--transition);
  position: relative;
}
.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(139, 92, 246, 0.14);
}
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--primary-light);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-cta {
  padding: 10px 22px;
  font-size: 14px;
}
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.12);
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 40px) 0 80px;
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 12, 24, 0.92) 0%, rgba(13, 18, 38, 0.72) 46%, rgba(10, 15, 30, 0.88) 100%);
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to bottom, transparent, var(--bg-primary));
  z-index: 2;
}
.hero .container {
  position: relative;
  z-index: 3;
}
.hero-inner {
  max-width: 720px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid rgba(139, 92, 246, 0.28);
  color: var(--primary-light);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.hero-badge .pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary-light);
  box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.5);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(139, 92, 246, 0); }
  100% { box-shadow: 0 0 0 0 rgba(139, 92, 246, 0); }
}
.hero-title {
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #d8d4ff 60%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 52px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 640px;
}
.stat-item {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  backdrop-filter: blur(6px);
  transition: var(--transition);
}
.stat-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.14);
  transform: translateY(-2px);
}
.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.2;
}
.stat-num span {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 2px;
}
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ========== Features ========== */
.features-section {
  background: var(--bg-primary);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 26px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--cyan));
  opacity: 0;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 255, 255, 0.12);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.12), rgba(6, 182, 212, 0.1));
  border: 1px solid rgba(139, 92, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary-light);
  margin-bottom: 20px;
  transition: var(--transition);
}
.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.feature-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ========== Categories ========== */
.categories-section {
  background: var(--bg-secondary);
}
.categories-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.category-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.14);
}
.category-media {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.category-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.category-card:hover .category-media img {
  transform: scale(1.04);
}
.category-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 17, 32, 0.7), transparent 60%);
}
.category-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
}
.category-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.category-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.category-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
  flex: 1;
}
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary-light);
  transition: var(--transition);
}
.category-link:hover {
  gap: 12px;
  color: var(--accent-light);
}

/* ========== News ========== */
.news-section {
  background: var(--bg-primary);
}
.news-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: var(--transition);
}
.news-item:hover {
  background: rgba(21, 31, 61, 0.85);
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}
.news-cat {
  flex-shrink: 0;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary-light);
  border: 1px solid rgba(139, 92, 246, 0.18);
  min-width: 72px;
  text-align: center;
  white-space: nowrap;
}
.news-body {
  flex: 1;
  min-width: 0;
}
.news-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-desc {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-date {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
.news-date i {
  font-size: 12px;
}
.news-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 15px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px dashed rgba(255, 255, 255, 0.12);
}

/* ========== Steps ========== */
.steps-section {
  background: var(--bg-secondary);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  counter-reset: step;
}
.step-item {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 24px 28px;
  text-align: center;
  transition: var(--transition);
}
.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.step-item::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(139, 92, 246, 0.35);
}
.step-icon {
  font-size: 30px;
  color: var(--primary-light);
  margin-bottom: 16px;
  margin-top: 8px;
}
.step-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.step-item p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Services ========== */
.services-section {
  background: var(--bg-primary);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.14);
}
.service-media {
  height: 170px;
  overflow: hidden;
  position: relative;
}
.service-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.service-card:hover .service-media img {
  transform: scale(1.05);
}
.service-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(11, 17, 32, 0.6), transparent 70%);
}
.service-body {
  padding: 26px 28px 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.service-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.service-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  flex: 1;
}
.service-meta {
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}
.service-meta i {
  color: var(--primary-light);
}
.service-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 52px;
}
.service-stat {
  text-align: center;
  padding: 28px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.service-stat:hover {
  transform: translateY(-4px);
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
}
.service-stat .stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--accent-light);
}
.service-stat .stat-label {
  margin-top: 6px;
  font-size: 14px;
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg-secondary);
}
.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-accordion .accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-accordion .accordion-item:hover {
  border-color: rgba(255, 255, 255, 0.14);
}
.faq-accordion .accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: none;
  transition: var(--transition);
  position: relative;
}
.faq-accordion .accordion-title::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 700;
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-accordion .accordion-item.is-active .accordion-title {
  color: var(--primary-light);
}
.faq-accordion .accordion-item.is-active .accordion-title::after {
  transform: rotate(180deg);
  color: var(--primary-light);
}
.faq-accordion .accordion-content {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 12, 24, 0.9), rgba(10, 15, 30, 0.75));
}
.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}
.cta-inner p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.cta-buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

/* ========== Footer ========== */
.site-footer {
  background: #070b16;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom .tech-domain {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.28);
}

/* ========== Reveal Animation ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .services-grid .service-card:last-child {
    grid-column: 1 / -1;
    max-width: 500px;
    margin: 0 auto;
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    max-width: 480px;
  }
}
@media (max-width: 768px) {
  :root {
    --space-section: 64px;
    --space-section-sm: 40px;
  }
  .mobile-toggle {
    display: flex;
  }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(8, 12, 24, 0.97);
    backdrop-filter: blur(18px);
    flex-direction: column;
    align-items: stretch;
    padding: 20px 24px;
    gap: 8px;
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-links a {
    padding: 14px 18px;
    border-radius: 12px;
  }
  .nav-links a.active {
    background: rgba(139, 92, 246, 0.12);
  }
  .nav-links a.active::after {
    display: none;
  }
  .nav-cta {
    display: none;
  }
  .hero {
    min-height: auto;
    padding-top: calc(var(--nav-height) + 28px);
    padding-bottom: 60px;
  }
  .hero-title {
    font-size: clamp(28px, 8vw, 38px);
  }
  .hero-desc {
    font-size: 15px;
  }
  .categories-grid {
    grid-template-columns: 1fr;
  }
  .news-item {
    flex-wrap: wrap;
    padding: 16px 18px;
    gap: 10px;
  }
  .news-body {
    flex: 1 1 calc(100% - 90px);
  }
  .news-date {
    margin-left: auto;
  }
  .service-stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .nav-container {
    padding: 0 16px;
  }
  .logo {
    font-size: 16px;
  }
  .logo .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 15px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .services-grid .service-card:last-child {
    grid-column: auto;
  }
  .hero-buttons {
    flex-direction: column;
  }
  .hero-buttons .btn {
    width: 100%;
  }
  .hero-stats {
    grid-template-columns: 1fr;
  }
  .stat-item {
    padding: 14px 16px;
  }
  .section-header h2 {
    font-size: 26px;
  }
  .news-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-body {
    flex: 1;
  }
  .news-title {
    white-space: normal;
  }
  .news-desc {
    white-space: normal;
  }
  .news-date {
    margin-left: 0;
  }
  .cta-section {
    padding: 64px 0;
  }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1c2a51;
  --primary-deep: #121c38;
  --secondary: #4a6cf7;
  --secondary-light: #6e8bff;
  --accent: #f0b241;
  --accent-deep: #d99b1f;
  --bg-light: #f5f7fc;
  --bg-white: #ffffff;
  --text-main: #1c2230;
  --text-weak: #667085;
  --border-light: #e6e9f0;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-card: 0 12px 32px rgba(28, 42, 81, 0.10);
  --shadow-hover: 0 18px 44px rgba(28, 42, 81, 0.16);
  --transition-base: all 0.3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg-light);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition-base); }
button { background: none; border: none; cursor: pointer; font-family: inherit; }
input { font-family: inherit; }

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

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: var(--primary-deep);
  box-shadow: 0 8px 24px rgba(240, 178, 65, 0.35);
}
.btn-primary:hover {
  background: var(--accent-deep);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(240, 178, 65, 0.45);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(240, 178, 65, 0.30);
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.24);
  border-color: #fff;
  transform: translateY(-2px);
}
.btn-ghost:active {
  transform: translateY(0);
}
.btn-outline {
  border-color: var(--secondary);
  color: var(--secondary);
  background: transparent;
}
.btn-outline:hover {
  background: var(--secondary);
  color: #fff;
  transform: translateY(-2px);
}

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(18, 28, 56, 0.32);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 24px rgba(28, 42, 81, 0.08);
  border-bottom-color: rgba(28, 42, 81, 0.08);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: #fff;
  letter-spacing: 0.8px;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #ffd77a);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-deep);
  font-size: 17px;
  box-shadow: 0 6px 16px rgba(240, 178, 65, 0.35);
  transition: var(--transition-base);
}
.logo:hover .logo-icon {
  transform: rotate(15deg) scale(1.05);
}
.site-header.scrolled .logo {
  color: var(--primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
}
.nav-links li {
  margin: 0;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 30px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.88);
  transition: var(--transition-base);
}
.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
}
.nav-links a.active {
  color: var(--primary-deep);
  background: var(--accent);
  font-weight: 600;
}
.site-header.scrolled .nav-links a {
  color: var(--text-main);
}
.site-header.scrolled .nav-links a:hover {
  color: var(--secondary);
  background: rgba(74, 108, 247, 0.08);
}
.site-header.scrolled .nav-links a.active {
  color: var(--primary-deep);
  background: var(--accent);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.nav-cta {
  padding: 10px 22px;
  font-size: 14px;
}
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.10);
  transition: var(--transition-base);
}
.site-header.scrolled .mobile-toggle {
  color: var(--primary);
  border-color: var(--border-light);
  background: var(--bg-white);
}
.mobile-toggle:hover {
  background: var(--accent);
  color: var(--primary-deep);
}

/* ========== 页面 Hero ========== */
.page-hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 160px 0 80px;
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(18, 28, 56, 0.92) 0%, rgba(28, 42, 81, 0.75) 60%, rgba(74, 108, 247, 0.30) 100%);
}
.page-hero::after {
  content: '';
  position: absolute;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(240, 178, 65, 0.14);
  filter: blur(80px);
  right: -100px;
  bottom: -120px;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 8px 18px;
  border-radius: 40px;
  font-size: 13px;
  letter-spacing: 1px;
  color: #fff;
  backdrop-filter: blur(8px);
  margin-bottom: 24px;
}
.hero-badge i {
  color: var(--accent);
}
.page-hero h1 {
  font-size: 48px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.88);
  max-width: 680px;
  margin-bottom: 34px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 48px;
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  padding: 24px 10px;
  backdrop-filter: blur(10px);
  max-width: 620px;
}
.stat-item {
  flex: 1;
  text-align: center;
  padding: 0 18px;
  border-right: 1px solid rgba(255, 255, 255, 0.14);
}
.stat-item:last-child {
  border-right: none;
}
.stat-item strong {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.3;
}
.stat-item span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.80);
}

/* ========== 通用板块 ========== */
.section {
  padding: 90px 0;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-subtitle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--secondary);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-subtitle::before,
.section-subtitle::after {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-header h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 12px;
}
.section-header p {
  color: var(--text-weak);
  font-size: 16px;
  line-height: 1.8;
}

/* ========== 入驻流程 ========== */
.process-section {
  background: var(--bg-white);
  position: relative;
}
.process-grid {
  margin: 0 -12px;
}
.process-card {
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 34px 28px;
  position: relative;
  transition: var(--transition-base);
  height: 100%;
}
.process-card:hover {
  background: #fff;
  border-color: var(--secondary-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-6px);
}
.process-step {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: 0 8px 20px rgba(74, 108, 247, 0.28);
}
.process-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.process-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
  margin-bottom: 0;
}
.process-link {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--secondary);
}
.process-link i {
  font-size: 12px;
  transition: transform 0.3s;
}
.process-card:hover .process-link i {
  transform: translateX(4px);
}

/* ========== 资料清单 ========== */
.material-section {
  background: var(--bg-light);
}
.material-wrap {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  padding: 50px;
  border: 1px solid var(--border-light);
}
.material-intro {
  margin-bottom: 36px;
}
.material-intro h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.material-intro p {
  color: var(--text-weak);
  font-size: 15px;
  max-width: 760px;
}
.material-list {
  list-style: none;
  margin: 0;
}
.material-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--border-light);
}
.material-list li:last-child {
  border-bottom: none;
}
.material-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  flex-shrink: 0;
  background: rgba(74, 108, 247, 0.10);
  color: var(--secondary);
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.material-text h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.material-text p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  margin: 0;
}
.material-note {
  background: rgba(240, 178, 65, 0.10);
  border: 1px solid rgba(240, 178, 65, 0.35);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #8a5c00;
  font-size: 14px;
}
.material-note i {
  font-size: 18px;
  color: var(--accent-deep);
}

/* ========== 平台优势 ========== */
.feature-section {
  position: relative;
  background-size: cover;
  background-position: center;
  color: #fff;
  overflow: hidden;
}
.feature-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(140deg, rgba(18, 28, 56, 0.95) 0%, rgba(28, 42, 81, 0.88) 55%, rgba(74, 108, 247, 0.55) 100%);
}
.feature-section .container {
  position: relative;
  z-index: 2;
}
.feature-section .section-header h2 {
  color: #fff;
}
.feature-section .section-header p {
  color: rgba(255, 255, 255, 0.85);
}
.feature-section .section-subtitle {
  color: var(--accent);
}
.feature-grid .cell {
  margin-bottom: 20px;
}
.feature-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius-lg);
  padding: 34px 30px;
  height: 100%;
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}
.feature-card:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(240, 178, 65, 0.55);
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}
.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), #ffd77a);
  color: var(--primary-deep);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 8px 20px rgba(240, 178, 65, 0.30);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.8;
  margin: 0;
}

/* ========== 资讯卡片 ========== */
.insight-section {
  background: var(--bg-white);
}
.insight-card {
  border-radius: var(--radius-lg);
  background: var(--bg-light);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition-base);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.insight-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-5px);
  border-color: var(--secondary-light);
}
.insight-cover {
  position: relative;
  height: 190px;
  overflow: hidden;
}
.insight-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.insight-card:hover .insight-cover img {
  transform: scale(1.06);
}
.insight-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(18, 28, 56, 0.55) 100%);
}
.insight-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  background: rgba(18, 28, 56, 0.75);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.insight-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.insight-content h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.55;
  margin-bottom: 10px;
}
.insight-content h3 a:hover {
  color: var(--secondary);
}
.insight-content p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.75;
  flex: 1;
  margin-bottom: 16px;
}
.insight-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-weak);
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
}
.insight-meta i {
  margin-right: 5px;
  color: var(--secondary);
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg-light);
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.faq-item.open {
  border-color: var(--secondary-light);
  box-shadow: var(--shadow-card);
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  cursor: pointer;
}
.faq-question .faq-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(74, 108, 247, 0.10);
  color: var(--secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.35s ease, background 0.3s ease;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--secondary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer p {
  padding: 0 24px 22px;
  color: var(--text-weak);
  font-size: 14px;
  line-height: 1.85;
  border-top: 1px solid var(--border-light);
  margin: 0 24px;
  padding-left: 0;
  padding-right: 0;
  padding-top: 16px;
}
.faq-item.flex-fix .faq-answer {
  max-height: 320px;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background: linear-gradient(135deg, var(--primary-deep) 0%, var(--primary) 65%, var(--secondary) 130%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(240, 178, 65, 0.12);
  filter: blur(100px);
  top: -160px;
  right: -80px;
}
.cta-section .container {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-section p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.85);
  max-width: 620px;
  margin: 0 auto 34px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-actions .btn-primary {
  padding: 14px 36px;
  font-size: 16px;
}
.cta-actions .btn-ghost {
  padding: 14px 36px;
  font-size: 16px;
}

/* ========== 页脚 ========== */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255, 255, 255, 0.75);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.4fr;
  gap: 50px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 18px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.62);
  max-width: 380px;
  margin: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
}
.footer-col li {
  margin-bottom: 12px;
}
.footer-col a {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: var(--transition-base);
}
.footer-col a:hover {
  color: var(--accent);
  transform: translateX(4px);
}
.footer-col a i {
  color: var(--accent);
  font-size: 14px;
  width: 18px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 28px 0 32px;
}
.footer-bottom p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin: 0;
}
.tech-domain {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.5px;
}

/* ========== Foundation 覆写 ========== */
.grid-margin-x > .cell {
  margin-bottom: 20px;
}
.button {
  border-radius: 50px;
  font-weight: 600;
}
a:focus,
button:focus,
input:focus {
  outline: 2px solid var(--secondary);
  outline-offset: 3px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    padding: 18px 24px;
    margin: 0;
    display: none;
    box-shadow: 0 18px 40px rgba(28, 42, 81, 0.14);
    border-top: 1px solid var(--border-light);
  }
  .nav-links.open {
    display: flex;
    max-height: calc(100vh - 74px);
    overflow-y: auto;
  }
  .nav-links li {
    width: 100%;
  }
  .nav-links a {
    color: var(--text-main) !important;
    padding: 14px 16px;
    display: block;
    border-radius: 12px;
    border-bottom: 1px solid var(--border-light);
  }
  .nav-links a.active {
    background: rgba(74, 108, 247, 0.10);
    color: var(--secondary) !important;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .page-hero h1 {
    font-size: 38px;
  }
  .section {
    padding: 72px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    height: 66px;
    padding: 0 18px;
  }
  .page-hero {
    min-height: 480px;
    padding: 140px 0 60px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .hero-lead {
    font-size: 15px;
  }
  .hero-stats {
    flex-direction: column;
    padding: 16px;
    gap: 12px;
  }
  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    padding: 8px 0;
  }
  .stat-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
  .section {
    padding: 60px 0;
  }
  .section-header h2 {
    font-size: 27px;
  }
  .process-card {
    padding: 26px 22px;
  }
  .material-wrap {
    padding: 28px 20px;
  }
  .feature-card {
    padding: 26px 22px;
  }
  .cta-section h2 {
    font-size: 27px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .nav-cta {
    display: none;
  }
}

@media (max-width: 520px) {
  .page-hero h1 {
    font-size: 27px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .material-note {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .footer-col li a {
    font-size: 14px;
  }
  .container {
    padding: 0 18px;
  }
}

/* roulang page: article */
:root {
        --primary: #6c5ce7;
        --primary-dark: #4b3cb5;
        --primary-light: #8a7ff5;
        --accent: #f6a821;
        --accent-light: #ffc85a;
        --dark-bg: #0f0e17;
        --dark-bg-2: #17152b;
        --bg: #ffffff;
        --bg-alt: #f7f6fe;
        --text: #1e1d2e;
        --text-light: #6b6a7b;
        --text-muted: #9a99ad;
        --border: #e8e6f5;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-lg: 24px;
        --shadow-sm: 0 2px 12px rgba(15, 14, 23, 0.06);
        --shadow: 0 8px 30px rgba(15, 14, 23, 0.08);
        --shadow-lg: 0 20px 50px rgba(15, 14, 23, 0.14);
        --transition: 0.25s ease;
        --transition-slow: 0.4s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

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

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

    a {
        color: var(--primary);
        text-decoration: none;
        transition: color 0.25s ease, opacity 0.25s ease, box-shadow 0.25s ease;
    }

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

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

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        margin: 0;
        font-weight: 600;
        line-height: 1.35;
        color: var(--text);
    }

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

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

    @media (max-width: 768px) {
        .container {
            padding: 0 16px;
        }
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 26px;
        border-radius: 50px;
        font-size: 15px;
        font-weight: 600;
        line-height: 1.4;
        border: 1px solid transparent;
        cursor: pointer;
        transition: all 0.25s ease;
        text-decoration: none;
        white-space: nowrap;
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        border: none;
        box-shadow: 0 6px 20px rgba(108, 92, 231, 0.35);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 28px rgba(108, 92, 231, 0.45);
        color: #fff;
    }

    .btn-outline-primary {
        background: transparent;
        border: 2px solid var(--primary);
        color: var(--primary);
    }

    .btn-outline-primary:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 22px rgba(108, 92, 231, 0.25);
    }

    .btn-light {
        background: #fff;
        color: var(--primary-dark);
        box-shadow: 0 6px 20px rgba(255, 255, 255, 0.2);
    }

    .btn-light:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 30px rgba(255, 255, 255, 0.3);
        color: var(--primary);
    }

    .btn-outline-light {
        background: transparent;
        border: 2px solid rgba(255, 255, 255, 0.7);
        color: #fff;
    }

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

    .btn-block {
        width: 100%;
    }

    .badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 5px 14px;
        border-radius: 50px;
        font-size: 13px;
        font-weight: 600;
        background: rgba(108, 92, 231, 0.1);
        color: var(--primary);
        border: 1px solid rgba(108, 92, 231, 0.2);
    }

    .badge-gold {
        background: rgba(246, 168, 33, 0.12);
        color: #b57908;
        border-color: rgba(246, 168, 33, 0.25);
    }

    .section {
        padding: 90px 0;
    }

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

    .section-title {
        font-size: 2rem;
        font-weight: 700;
        text-align: center;
        margin-bottom: 12px;
        letter-spacing: -0.02em;
    }

    .section-subtitle {
        text-align: center;
        color: var(--text-light);
        font-size: 16px;
        max-width: 560px;
        margin: 0 auto 50px;
        line-height: 1.8;
    }

    @media (max-width: 768px) {
        .section {
            padding: 60px 0;
        }
        .section-title {
            font-size: 1.6rem;
        }
        .section-subtitle {
            margin-bottom: 34px;
        }
    }

    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(15, 14, 23, 0.55);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    }

    .site-header.scrolled {
        background: rgba(15, 14, 23, 0.92);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
        border-color: rgba(255, 255, 255, 0.06);
    }

    .nav-container {
        max-width: 1280px;
        margin: 0 auto;
        padding: 0 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 78px;
    }

    @media (max-width: 768px) {
        .nav-container {
            height: 66px;
            padding: 0 16px;
        }
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        color: #fff;
        font-size: 18px;
        font-weight: 700;
        letter-spacing: 0.02em;
        text-decoration: none;
        white-space: nowrap;
    }

    .logo:hover {
        color: #fff;
        opacity: 0.9;
    }

    .logo-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        font-size: 18px;
        box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 34px;
        margin: 0;
        padding: 0;
    }

    .nav-links li {
        margin: 0;
    }

    .nav-links a {
        color: rgba(255, 255, 255, 0.85);
        font-size: 15px;
        font-weight: 500;
        text-decoration: none;
        padding: 8px 0;
        position: relative;
        transition: color 0.25s ease;
    }

    .nav-links a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        border-radius: 2px;
        background: var(--accent);
        transition: width 0.3s ease;
    }

    .nav-links a:hover {
        color: #fff;
    }

    .nav-links a.active {
        color: #fff;
        font-weight: 600;
    }

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

    .nav-actions {
        display: flex;
        align-items: center;
        gap: 14px;
    }

    .nav-cta {
        padding: 9px 20px;
        font-size: 14px;
    }

    .mobile-toggle {
        display: none;
        background: none;
        border: 1px solid rgba(255, 255, 255, 0.25);
        color: #fff;
        width: 42px;
        height: 42px;
        border-radius: 12px;
        font-size: 18px;
        cursor: pointer;
        align-items: center;
        justify-content: center;
        transition: background 0.25s ease;
    }

    .mobile-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    @media (max-width: 980px) {
        .nav-links {
            position: fixed;
            top: 78px;
            left: 0;
            right: 0;
            background: rgba(15, 14, 23, 0.98);
            flex-direction: column;
            align-items: stretch;
            gap: 0;
            padding: 12px 24px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: none;
            max-height: calc(100vh - 78px);
            overflow-y: auto;
        }

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

        .nav-links li {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .nav-links li:last-child {
            border-bottom: none;
        }

        .nav-links a {
            display: block;
            padding: 15px 4px;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
        }

        .nav-links a::after {
            display: none;
        }

        .nav-links a.active {
            padding-left: 12px;
            border-left: 3px solid var(--accent);
        }

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

    @media (max-width: 520px) {
        .nav-cta {
            display: none;
        }
    }

    .page-banner {
        position: relative;
        padding: 170px 0 80px;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }

    .page-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(15, 14, 23, 0.75) 0%, rgba(15, 14, 23, 0.55) 50%, rgba(15, 14, 23, 0.85) 100%);
        z-index: 1;
    }

    .banner-content {
        position: relative;
        z-index: 2;
        max-width: 860px;
        margin: 0 auto;
        text-align: center;
    }

    .breadcrumb {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 8px;
        color: rgba(255, 255, 255, 0.6);
        font-size: 14px;
        margin-bottom: 22px;
    }

    .breadcrumb a {
        color: rgba(255, 255, 255, 0.8);
        text-decoration: none;
        transition: color 0.25s ease;
    }

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

    .breadcrumb i {
        font-size: 11px;
        color: rgba(255, 255, 255, 0.4);
    }

    .breadcrumb .current {
        color: rgba(255, 255, 255, 0.9);
        max-width: 320px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .banner-title {
        color: #fff;
        font-size: 2.4rem;
        font-weight: 700;
        line-height: 1.4;
        margin-bottom: 18px;
        letter-spacing: -0.01em;
        text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        word-break: break-word;
    }

    .banner-meta {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 16px;
        color: rgba(255, 255, 255, 0.75);
        font-size: 14px;
    }

    .meta-date {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(255, 255, 255, 0.12);
        padding: 5px 14px;
        border-radius: 50px;
    }

    .banner-meta .badge {
        background: rgba(246, 168, 33, 0.2);
        color: var(--accent-light);
        border-color: rgba(246, 168, 33, 0.3);
    }

    @media (max-width: 768px) {
        .page-banner {
            padding: 130px 0 56px;
        }

        .banner-title {
            font-size: 1.6rem;
        }

        .banner-meta {
            gap: 10px;
        }
    }

    @media (max-width: 520px) {
        .banner-title {
            font-size: 1.4rem;
        }
    }

    .article-section {
        padding: 70px 0 30px;
        background: var(--bg);
    }

    .article-col {
        padding-bottom: 40px;
    }

    .article-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        padding: 44px;
        transition: box-shadow 0.3s ease;
    }

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

    @media (max-width: 768px) {
        .article-card {
            padding: 24px 20px;
        }
    }

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

    .article-body h2 {
        font-size: 1.6rem;
        margin: 2.2rem 0 1rem;
        padding-bottom: 10px;
        border-bottom: 2px solid var(--border);
        position: relative;
    }

    .article-body h2::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 48px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
    }

    .article-body h3 {
        font-size: 1.28rem;
        margin: 1.8rem 0 0.8rem;
    }

    .article-body p {
        margin: 0 0 1.4rem;
        color: #333;
    }

    .article-body ul,
    .article-body ol {
        margin: 1rem 0 1.4rem;
        padding-left: 1.4rem;
    }

    .article-body ul {
        list-style: disc;
    }

    .article-body ol {
        list-style: decimal;
    }

    .article-body li {
        margin-bottom: 0.5rem;
        line-height: 1.8;
    }

    .article-body img {
        border-radius: var(--radius);
        margin: 1.5rem 0;
        box-shadow: var(--shadow-sm);
    }

    .article-body blockquote {
        background: var(--bg-alt);
        border-left: 4px solid var(--primary);
        padding: 16px 22px;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        margin: 1.5rem 0;
        color: var(--text-light);
        font-style: italic;
    }

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

    .article-body a:hover {
        color: var(--primary-dark);
        text-decoration: none;
    }

    .article-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 14px;
        margin-top: 40px;
        padding-top: 24px;
        border-top: 1px solid var(--border);
    }

    .article-back {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        padding: 8px 18px;
        border-radius: 50px;
        border: 1px solid var(--border);
        color: var(--text-light);
        transition: all 0.25s ease;
    }

    .article-back:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: rgba(108, 92, 231, 0.05);
    }

    .not-found {
        text-align: center;
        padding: 60px 30px;
    }

    .not-found-icon {
        width: 80px;
        height: 80px;
        border-radius: 50%;
        background: rgba(108, 92, 231, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 24px;
        font-size: 32px;
        color: var(--primary);
    }

    .not-found h2 {
        font-size: 1.5rem;
        margin-bottom: 12px;
    }

    .not-found p {
        color: var(--text-light);
        margin-bottom: 28px;
    }

    .sidebar-col {
        padding-bottom: 40px;
    }

    .sidebar {
        position: sticky;
        top: 100px;
        display: flex;
        flex-direction: column;
        gap: 24px;
    }

    .side-widget {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        padding: 28px;
        box-shadow: var(--shadow-sm);
    }

    .side-widget h3 {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 18px;
        padding-bottom: 14px;
        border-bottom: 2px solid var(--border);
        position: relative;
    }

    .side-widget h3::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 36px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
    }

    .side-list {
        display: flex;
        flex-direction: column;
    }

    .side-list li {
        margin-bottom: 0;
        border-bottom: 1px solid var(--border);
    }

    .side-list li:last-child {
        border-bottom: none;
    }

    .side-list a {
        display: flex;
        flex-direction: column;
        gap: 4px;
        padding: 12px 0;
        text-decoration: none;
        color: var(--text);
        transition: all 0.25s ease;
    }

    .side-list a:hover {
        color: var(--primary);
        padding-left: 6px;
    }

    .side-list-title {
        font-size: 14px;
        line-height: 1.5;
        font-weight: 500;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .side-list-date {
        font-size: 12px;
        color: var(--text-muted);
    }

    .side-empty {
        padding: 12px 0;
        color: var(--text-light);
        font-size: 14px;
    }

    .category-links {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .category-link {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 14px 16px;
        background: var(--bg-alt);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        color: var(--text);
        font-size: 14px;
        font-weight: 500;
        text-decoration: none;
        transition: all 0.25s ease;
    }

    .category-link i:first-child {
        color: var(--primary);
        font-size: 18px;
    }

    .category-link i:last-child {
        margin-left: auto;
        color: var(--text-muted);
        font-size: 13px;
        transition: transform 0.25s ease;
    }

    .category-link:hover {
        background: #fff;
        border-color: var(--primary);
        color: var(--primary);
        transform: translateX(4px);
        box-shadow: var(--shadow-sm);
    }

    .category-link:hover i:last-child {
        transform: translateX(4px);
        color: var(--primary);
    }

    .support-widget {
        background: linear-gradient(145deg, var(--dark-bg-2), var(--dark-bg));
        border: none;
        color: rgba(255, 255, 255, 0.85);
    }

    .support-widget h3 {
        color: #fff;
        border-bottom-color: rgba(255, 255, 255, 0.15);
    }

    .support-widget h3::after {
        background: var(--accent);
    }

    .support-widget p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 20px;
    }

    .support-widget .btn {
        background: #fff;
        color: var(--primary-dark);
        width: 100%;
        font-size: 14px;
    }

    .support-widget .btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 22px rgba(0, 0, 0, 0.2);
    }

    .category-cards-section {
        padding: 30px 0 70px;
        background: var(--bg);
    }

    .category-section-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-end;
        margin-bottom: 32px;
        flex-wrap: wrap;
        gap: 16px;
    }

    .category-section-header h2 {
        font-size: 1.6rem;
        font-weight: 700;
        margin: 0;
    }

    .category-section-header p {
        color: var(--text-light);
        margin: 0;
        font-size: 15px;
    }

    .category-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: all 0.3s ease;
        height: 100%;
        display: flex;
        flex-direction: column;
    }

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

    .category-card-img {
        width: 100%;
        height: 190px;
        object-fit: cover;
        display: block;
        transition: transform 0.4s ease;
    }

    .category-card:hover .category-card-img {
        transform: scale(1.03);
    }

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

    .category-card-body h3 {
        font-size: 17px;
        font-weight: 700;
        margin-bottom: 10px;
    }

    .category-card-body p {
        font-size: 14px;
        color: var(--text-light);
        line-height: 1.7;
        margin-bottom: 20px;
        flex: 1;
    }

    .category-card-body .btn {
        align-self: flex-start;
        font-size: 14px;
        padding: 10px 22px;
    }

    .faq-section {
        padding: 80px 0;
        background: var(--bg-alt);
    }

    .faq-accordion {
        max-width: 820px;
        margin: 0 auto;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
    }

    .faq-accordion .accordion-item {
        border-bottom: 1px solid var(--border);
        background: #fff;
    }

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

    .faq-accordion .accordion-title {
        font-size: 16px;
        font-weight: 600;
        color: var(--text);
        padding: 20px 28px;
        border-bottom: 1px solid var(--border);
        background: #fff;
        transition: background 0.25s ease, color 0.25s ease;
    }

    .faq-accordion .accordion-title:hover {
        background: var(--bg-alt);
        color: var(--primary);
    }

    .faq-accordion .accordion-title::before {
        content: '\f059';
        font-family: 'Font Awesome 6 Free';
        font-weight: 400;
        margin-right: 12px;
        color: var(--primary);
        font-size: 16px;
    }

    .faq-accordion .accordion-item.is-active .accordion-title {
        background: var(--bg-alt);
        color: var(--primary);
    }

    .faq-accordion .accordion-content {
        padding: 18px 28px;
        color: var(--text-light);
        font-size: 15px;
        line-height: 1.8;
        background: var(--bg-alt);
    }

    .faq-accordion .accordion-content p {
        margin-bottom: 0;
    }

    @media (max-width: 768px) {
        .faq-accordion .accordion-title {
            padding: 16px 18px;
            font-size: 15px;
        }

        .faq-accordion .accordion-content {
            padding: 14px 18px;
        }
    }

    .cta-section {
        padding: 70px 0 90px;
        background: var(--dark-bg);
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -120px;
        right: -120px;
        width: 360px;
        height: 360px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(108, 92, 231, 0.3), transparent 65%);
        pointer-events: none;
    }

    .cta-section::after {
        content: '';
        position: absolute;
        bottom: -140px;
        left: -100px;
        width: 320px;
        height: 320px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(246, 168, 33, 0.15), transparent 65%);
        pointer-events: none;
    }

    .cta-card {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 720px;
        margin: 0 auto;
        padding: 40px 20px;
    }

    .cta-card h2 {
        color: #fff;
        font-size: 1.9rem;
        margin-bottom: 16px;
        font-weight: 700;
    }

    .cta-card p {
        color: rgba(255, 255, 255, 0.7);
        font-size: 16px;
        margin-bottom: 34px;
        line-height: 1.7;
    }

    .cta-actions {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 14px;
    }

    .cta-glint {
        position: absolute;
        top: 30%;
        left: 18%;
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.5);
        box-shadow: 0 0 12px rgba(255, 255, 255, 0.8);
    }

    .cta-glint-2 {
        top: 46%;
        left: 72%;
        width: 3px;
        height: 3px;
        box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
    }

    .cta-glint-3 {
        top: 64%;
        left: 52%;
        width: 5px;
        height: 5px;
        box-shadow: 0 0 16px rgba(246, 168, 33, 0.7);
        background: rgba(246, 168, 33, 0.4);
    }

    @media (max-width: 768px) {
        .cta-section {
            padding: 60px 0;
        }

        .cta-card h2 {
            font-size: 1.5rem;
        }
    }

    .site-footer {
        background: #0a0910;
        padding: 70px 0 30px;
        color: rgba(255, 255, 255, 0.6);
        border-top: 1px solid rgba(255, 255, 255, 0.04);
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1.2fr;
        gap: 40px;
        margin-bottom: 48px;
    }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        margin: 16px 0 0;
        color: rgba(255, 255, 255, 0.55);
        max-width: 380px;
    }

    .footer-brand .logo {
        font-size: 17px;
    }

    .footer-col h4 {
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        margin-bottom: 20px;
        position: relative;
        padding-bottom: 10px;
    }

    .footer-col h4::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 28px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
    }

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

    .footer-col ul li a {
        color: rgba(255, 255, 255, 0.55);
        font-size: 14px;
        text-decoration: none;
        transition: all 0.25s ease;
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }

    .footer-col ul li a:hover {
        color: #fff;
        padding-left: 4px;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        padding-top: 26px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        font-size: 13px;
        color: rgba(255, 255, 255, 0.4);
    }

    .footer-bottom p {
        margin: 0;
    }

    .tech-domain {
        font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
        font-size: 12px;
        letter-spacing: 0.5px;
        color: rgba(255, 255, 255, 0.3);
    }

    @media (max-width: 900px) {
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }
    }

    @media (max-width: 520px) {
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }

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

    .mt-4 {
        margin-top: 40px;
    }

    .mb-4 {
        margin-bottom: 40px;
    }

    :focus-visible {
        outline: 3px solid rgba(108, 92, 231, 0.5);
        outline-offset: 2px;
    }

/* roulang page: category2 */
:root {
            --primary: #1e3a5f;
            --primary-light: #2e5a8a;
            --accent: #e8a838;
            --accent-light: #f5c96b;
            --bg-light: #f5f8fc;
            --bg-white: #ffffff;
            --text-main: #1a2433;
            --text-soft: #5a6b7d;
            --border-light: #e3eaf2;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(20, 40, 80, 0.08);
            --shadow-md: 0 8px 30px rgba(20, 40, 80, 0.12);
            --shadow-lg: 0 16px 50px rgba(20, 40, 80, 0.16);
            --space-section: 96px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg-white);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .section-pad {
            padding: var(--space-section) 0;
        }

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

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            padding: 8px 20px;
            border-radius: 40px;
            margin-bottom: 18px;
            text-transform: uppercase;
        }

        .section-tag i {
            color: var(--accent);
        }

        .section-title {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 17px;
            color: var(--text-soft);
            max-width: 720px;
            margin: 0 auto;
        }

        .text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.72);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.55);
            box-shadow: 0 4px 30px rgba(20, 40, 80, 0.06);
            transition: background 0.35s ease, box-shadow 0.35s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            box-shadow: 0 8px 40px rgba(20, 40, 80, 0.12);
        }

        .nav-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 800;
            font-size: 21px;
            color: var(--primary);
            white-space: nowrap;
            letter-spacing: 0.5px;
            transition: opacity 0.3s ease;
        }

        .logo:hover {
            opacity: 0.85;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.35);
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
        }

        .nav-links > li {
            margin: 0;
        }

        .nav-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-soft);
            padding: 10px 18px;
            border-radius: 30px;
            background: transparent;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .nav-links a i {
            font-size: 14px;
            color: var(--accent);
            opacity: 0.8;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
            border-color: rgba(30, 58, 95, 0.1);
        }

        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 6px 20px rgba(30, 58, 95, 0.3);
        }

        .nav-links a.active i {
            color: #fff;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 30px;
            border: 2px solid transparent;
            transition: all 0.3s ease;
            cursor: pointer;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 24px rgba(30, 58, 95, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(30, 58, 95, 0.38);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 6px 16px rgba(30, 58, 95, 0.3);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: #dce4ee;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(30, 58, 95, 0.04);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.35);
        }

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

        .nav-cta {
            padding: 10px 22px;
            font-size: 14px;
        }

        .mobile-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: none;
            background: rgba(30, 58, 95, 0.08);
            border-radius: 12px;
            cursor: pointer;
            color: var(--primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            transition: background 0.3s ease;
        }

        .mobile-toggle:hover {
            background: rgba(30, 58, 95, 0.15);
        }

        .mobile-toggle:focus-visible,
        .logo:focus-visible,
        .nav-links a:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(232, 168, 56, 0.6);
            outline-offset: 2px;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 170px 0 90px;
            background: linear-gradient(135deg, rgba(15, 32, 57, 0.96), rgba(30, 58, 95, 0.88)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            isolation: isolate;
        }

        .page-banner::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 40%, rgba(232, 168, 56, 0.22), transparent 55%);
            z-index: -1;
        }

        .page-banner .container {
            max-width: 1100px;
        }

        .page-banner .page-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.8px;
            padding: 6px 18px;
            border-radius: 40px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(8px);
        }

        .page-banner .page-tag i {
            color: var(--accent-light);
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }

        .page-banner .page-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.86);
            max-width: 620px;
            line-height: 1.8;
        }

        .banner-stats {
            display: flex;
            gap: 40px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.2);
        }

        .banner-stat-item {
            text-align: left;
        }

        .banner-stat-item .num {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.2;
        }

        .banner-stat-item .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.78);
            margin-top: 4px;
        }

        /* ===== Benefits Blocks ===== */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 60px;
        }

        .benefit-card {
            background: #fff;
            border-radius: 16px;
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: transform 0.35s ease, box-shadow 0.35s ease;
            text-align: center;
        }

        .benefit-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-md);
        }

        .benefit-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            box-shadow: 0 8px 24px rgba(30, 58, 95, 0.3);
        }

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

        .benefit-card p {
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.75;
        }

        /* ===== Update Section ===== */
        .update-section {
            background: var(--bg-light);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .update-grid {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 60px;
            align-items: center;
            margin-top: 60px;
        }

        .update-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .update-visual img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .update-visual-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 28px;
            background: linear-gradient(transparent, rgba(15, 32, 57, 0.9));
            color: #fff;
        }

        .update-visual-overlay h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .update-visual-overlay p {
            font-size: 14px;
            opacity: 0.85;
        }

        .update-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .update-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: #fff;
            border-radius: 14px;
            padding: 22px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .update-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .update-item .date-badge {
            min-width: 56px;
            text-align: center;
            background: rgba(30, 58, 95, 0.08);
            border-radius: 12px;
            padding: 8px 4px;
        }

        .update-item .date-badge .day {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }

        .update-item .date-badge .month {
            font-size: 12px;
            color: var(--text-soft);
            margin-top: 4px;
        }

        .update-item .content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

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

        /* ===== Level System ===== */
        .level-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 60px;
        }

        .level-card {
            background: var(--bg-light);
            border-radius: 20px;
            padding: 40px 32px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all 0.4s ease;
            position: relative;
        }

        .level-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(30, 58, 95, 0.2);
        }

        .level-card .level-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: #fff;
            background: linear-gradient(135deg, #8ea0b8, #5a708a);
            box-shadow: 0 8px 20px rgba(90, 112, 138, 0.3);
        }

        .level-card.featured .level-icon {
            background: linear-gradient(135deg, var(--accent), #d48a2a);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.4);
        }

        .level-card .level-name {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 6px;
        }

        .level-card .level-tagline {
            font-size: 14px;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 18px;
        }

        .level-card ul {
            text-align: left;
            margin: 20px 0 0;
            display: flex;
            flex-direction: column;
            gap: 11px;
        }

        .level-card ul li {
            display: flex;
            gap: 10px;
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.6;
        }

        .level-card ul li i {
            color: var(--primary);
            margin-top: 3px;
            font-size: 13px;
        }

        /* ===== Points / Flow ===== */
        .points-section {
            background: linear-gradient(135deg, var(--primary) 0%, #152a47 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .points-section::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: rgba(232, 168, 56, 0.12);
        }

        .points-section::after {
            content: "";
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .points-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            margin-top: 56px;
            position: relative;
            z-index: 2;
        }

        .points-col {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 20px;
            padding: 40px 36px;
            backdrop-filter: blur(10px);
        }

        .points-col h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--accent-light);
        }

        .points-col h3 i {
            font-size: 24px;
        }

        .points-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
        }

        .points-list .point-item {
            display: flex;
            gap: 14px;
            font-size: 15px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.92);
        }

        .points-list .point-item .marker {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(232, 168, 56, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            color: var(--accent-light);
            margin-top: 3px;
        }

        /* ===== Feature Cards ===== */
        .feature-section {
            background: var(--bg-white);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 60px;
        }

        .feature-card {
            background: #fff;
            border-radius: 18px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all 0.4s ease;
        }

        .feature-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .feature-card .feature-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .feature-card .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .feature-card:hover .feature-img img {
            transform: scale(1.06);
        }

        .feature-card .feature-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(30, 58, 95, 0.85);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 12px;
            padding: 5px 14px;
            border-radius: 30px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .feature-card .feature-body {
            padding: 24px 26px 28px;
        }

        .feature-card .feature-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .feature-card .feature-body p {
            font-size: 14px;
            color: var(--text-soft);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .feature-card .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.3s ease;
        }

        .feature-card .feature-link:hover {
            gap: 12px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-light);
            border-top: 1px solid var(--border-light);
        }

        .faq-grid {
            max-width: 820px;
            margin: 0 auto;
            margin-top: 56px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: 14px;
            margin-bottom: 16px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(30, 58, 95, 0.2);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            cursor: pointer;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            font-family: inherit;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            transition: color 0.25s ease;
        }

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

        .faq-question i {
            transition: transform 0.35s ease;
            color: var(--accent);
            font-size: 15px;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-soft);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            padding: 70px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.1;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 34px;
            color: #fff;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 30px;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #0f2039;
            color: rgba(255, 255, 255, 0.72);
            padding: 64px 0 24px;
        }

        .site-footer .logo {
            color: #fff;
        }

        .site-footer .logo .logo-icon {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent-light);
            box-shadow: none;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 50px;
            margin-bottom: 44px;
        }

        .footer-brand p {
            margin-top: 18px;
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

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

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 0;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.64);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 9px;
            transition: color 0.3s ease, transform 0.3s ease;
        }

        .footer-col ul a:hover {
            color: var(--accent-light);
            transform: translateX(3px);
        }

        .footer-col ul a i {
            font-size: 13px;
            color: var(--accent-light);
            opacity: 0.8;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin: 0;
        }

        .tech-domain {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.38);
            letter-spacing: 0.5px;
        }

        .back-to-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            border: none;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: all 0.35s ease;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

        .back-to-top:hover {
            background: var(--primary-light);
            transform: translateY(-4px);
        }

        .back-to-top:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }

            .section-title {
                font-size: 34px;
            }

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

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

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

            .update-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

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

            .page-banner h1 {
                font-size: 38px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media screen and (max-width: 768px) {
            .site-header {
                background: rgba(255, 255, 255, 0.96);
            }

            .nav-container {
                height: 68px;
                padding: 0 20px;
            }

            .nav-links {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                gap: 4px;
                box-shadow: 0 20px 50px rgba(20, 40, 80, 0.16);
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                z-index: 999;
            }

            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-links a {
                padding: 14px 16px;
                border-radius: 10px;
                justify-content: flex-start;
            }

            .nav-cta {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .page-banner {
                padding: 130px 0 60px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .banner-stats {
                flex-wrap: wrap;
                gap: 24px;
            }

            .section-title {
                font-size: 28px;
            }

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

            .benefit-card {
                padding: 24px 18px;
            }

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

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

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

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

            .faq-question {
                font-size: 15px;
                padding: 18px;
            }

            .faq-answer {
                padding: 0 18px;
            }

            .faq-item.open .faq-answer {
                padding: 0 18px 18px;
            }
        }

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

            .logo {
                font-size: 17px;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }

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

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

            .banner-stat-item .num {
                font-size: 24px;
            }

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

            .points-col {
                padding: 28px 20px;
            }

            .update-item {
                flex-direction: column;
                gap: 10px;
            }

            .date-badge {
                display: inline-flex;
                align-items: center;
                gap: 8px;
                min-width: auto !important;
                padding: 6px 14px !important;
                width: fit-content;
            }

            .date-badge .month {
                margin-top: 0 !important;
            }

            .header-fixed {
                padding: 0 4px;
            }

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