/* roulang page: index */
:root {
  --bg-deep: #070C1B;
  --bg-main: #0B1226;
  --surface-glass: rgba(255,255,255,0.045);
  --surface-hover: rgba(255,255,255,0.08);
  --border-glass: rgba(255,255,255,0.10);
  --primary: #2F6BFF;
  --primary-bright: #4D9FFF;
  --accent: #00E5FF;
  --accent-2: #8B5FFF;
  --text-main: #EAF1FF;
  --text-secondary: #9AAAC5;
  --text-muted: #647A9E;
  --success: #2DD4A8;
  --warning: #FFC857;
  --gradient-glow: linear-gradient(135deg, #00E5FF, #2F6BFF 55%, #8B5FFF);
  --glow-shadow: 0 0 20px rgba(0,229,255,0.35);
  --radius-card: 16px;
  --radius-large: 20px;
  --radius-btn: 999px;
  --radius-input: 12px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.30);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.40);
  --nav-height: 70px;
  --section-pad: clamp(64px, 8vw, 112px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -15%;
  left: -10%;
  width: 55%;
  height: 55%;
  background: radial-gradient(circle, rgba(0,229,255,0.08), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  bottom: -15%;
  right: -10%;
  width: 55%;
  height: 55%;
  background: radial-gradient(circle, rgba(139,95,255,0.06), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

a {
  color: var(--primary-bright);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

button, input {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container-custom {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  position: relative;
  padding: var(--section-pad) 0;
  z-index: 1;
}

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

.section-header h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background: var(--gradient-glow);
  color: #fff !important;
  border: none;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  box-shadow: var(--glow-shadow);
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-primary:hover {
  filter: brightness(1.15);
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0,229,255,0.45);
  color: #fff;
}

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

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  background: var(--surface-glass);
  color: var(--text-main) !important;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-btn);
  font-weight: 500;
  font-size: 15px;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: rgba(255,255,255,0.2);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 8px 24px;
  background: transparent;
  color: var(--text-secondary) !important;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-btn);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-outline:hover {
  background: rgba(255,255,255,0.06);
  color: var(--accent);
  border-color: var(--accent);
}

/* Header / Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(7,12,27,0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  background: rgba(7,12,27,0.82);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}

.nav-container {
  max-width: 1240px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.header-nav-left,
.header-nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
}

.header-nav-right {
  justify-content: flex-end;
}

.header-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
}

.brand-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 12px;
  transition: all 0.2s ease;
}

.brand-logo:hover {
  background: rgba(255,255,255,0.04);
}

.logo-mark {
  width: 30px;
  height: 30px;
  background: var(--gradient-glow);
  border-radius: 9px;
  display: inline-block;
  margin-right: 10px;
  box-shadow: var(--glow-shadow);
  position: relative;
  flex-shrink: 0;
}

.logo-mark::after {
  content: '';
  position: absolute;
  top: 5px;
  left: 5px;
  width: 20px;
  height: 20px;
  background: var(--bg-deep);
  border-radius: 6px;
  opacity: 0.35;
}

.logo-text {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-main);
  white-space: nowrap;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 6px 16px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--accent);
  background: rgba(255,255,255,0.05);
}

.nav-link.active {
  color: var(--text-main);
  font-weight: 600;
}

.nav-link.active::after {
  content: '';
  display: block;
  height: 2px;
  width: 100%;
  background: var(--gradient-glow);
  border-radius: 2px;
  margin-top: 2px;
}

.header-cta {
  margin-left: 10px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all 0.3s ease;
}

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

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

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

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(7,12,27,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column;
  padding: 20px 24px 32px;
  border-bottom: 1px solid var(--border-glass);
  z-index: 999;
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-link {
  display: block;
  padding: 14px 16px;
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 10px;
  transition: all 0.2s ease;
}

.mobile-link:hover {
  background: rgba(255,255,255,0.06);
  color: var(--accent);
}

.mobile-cta {
  margin-top: 16px;
  width: 100%;
}

/* Hero */
.hero {
  min-height: 90vh;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  position: relative;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + 40px);
  padding-bottom: 80px;
  z-index: 1;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7,12,27,0.88) 0%, rgba(7,12,27,0.62) 50%, rgba(7,12,27,0.35) 100%);
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,12,27,0.2) 0%, transparent 30%, transparent 60%, rgba(7,12,27,0.4) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(0,229,255,0.1);
  border: 1px solid rgba(0,229,255,0.25);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}

.hero h1 {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.hero h1 .highlight {
  background: var(--gradient-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 20px 28px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  max-width: 540px;
  flex-wrap: wrap;
}

.hero-stat {
  flex: 1;
  min-width: 120px;
}

.hero-stat-value {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Comparison Table */
.compare-section {
  background: var(--bg-deep);
}

.compare-section .section-header {
  text-align: left;
  max-width: 600px;
}

.compare-wrap {
  overflow-x: auto;
  border-radius: var(--radius-large);
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.compare-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

.compare-table th,
.compare-table td {
  padding: 18px 24px;
  text-align: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 15px;
}

.compare-table th:first-child,
.compare-table td:first-child {
  text-align: left;
  color: var(--text-secondary);
  font-weight: 500;
  width: 180px;
}

.compare-table thead th {
  background: rgba(255,255,255,0.03);
  padding: 28px 24px;
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody tr:hover {
  background: rgba(255,255,255,0.02);
}

.plan-col-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.plan-col-price {
  font-size: 15px;
  color: var(--accent);
  font-weight: 500;
}

.plan-col-recommend {
  position: relative;
}

.plan-col-recommend .recommend-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--warning);
  color: #1A1A2E;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}

.plan-col-highlight {
  background: rgba(0,229,255,0.04);
  border-left: 1px solid rgba(0,229,255,0.2);
  border-right: 1px solid rgba(0,229,255,0.2);
  box-shadow: inset 0 0 30px rgba(0,229,255,0.03);
}

.check-icon {
  display: inline-flex;
  color: var(--success);
}

.check-icon svg {
  width: 20px;
  height: 20px;
}

.dash-icon {
  color: var(--text-muted);
  font-size: 16px;
}

/* Highlights */
.highlights-section {
  background: var(--bg-main);
  position: relative;
  overflow: hidden;
}

.highlights-section::before {
  content: '';
  position: absolute;
  top: 40%;
  left: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(47,107,255,0.15), transparent 70%);
  pointer-events: none;
}

.highlights-grid {
  display: flex;
  flex-direction: column;
  gap: 48px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.highlight-card {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 36px 40px;
  width: 420px;
  max-width: 92%;
  position: relative;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

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

.highlight-card.is-left {
  align-self: flex-start;
}

.highlight-card.is-right {
  align-self: flex-end;
  margin-top: 24px;
  background: rgba(255,255,255,0.055);
}

.highlight-card.is-right:hover {
  background: rgba(255,255,255,0.09);
}

.highlight-card.is-centre {
  align-self: flex-start;
  background: rgba(139,95,255,0.06);
  border-color: rgba(139,95,255,0.2);
}

.highlight-card.is-centre::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-card);
  padding: 1px;
  background: var(--gradient-glow);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.highlight-num {
  position: absolute;
  top: -20px;
  right: 16px;
  font-size: 72px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.12);
  font-family: inherit;
  pointer-events: none;
}

.highlight-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.highlight-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 18px;
}

.highlight-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.highlight-link:hover {
  color: var(--primary-bright);
}

/* Preview Cards */
.preview-section {
  background: var(--bg-deep);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: start;
}

.preview-large {
  position: relative;
  border-radius: var(--radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: flex-end;
}

.preview-large img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.preview-large .preview-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7,12,27,0.72);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
  transition: all 0.4s ease;
}

.preview-large:hover .preview-overlay {
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  background: rgba(7,12,27,0.6);
}

.preview-lock-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-glow);
  border-radius: 50%;
  box-shadow: var(--glow-shadow);
  flex-shrink: 0;
}

.preview-lock-icon svg {
  width: 22px;
  height: 22px;
  color: #fff;
}

.preview-overlay span {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  letter-spacing: 2px;
}

.preview-small-col {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.preview-small {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 180px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: flex-end;
  transition: all 0.3s ease;
}

.preview-small:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.preview-small img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: blur(2px);
}

.preview-small .preview-small-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7,12,27,0.6);
  z-index: 1;
}

.preview-small .preview-small-title {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 2;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-small-lock {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(7,12,27,0.6);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  flex-shrink: 0;
}

.preview-small-lock svg {
  width: 14px;
  height: 14px;
  color: var(--text-muted);
}

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

.news-section .section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  text-align: left;
  margin-bottom: 36px;
}

.news-section .section-header .section-header-text h2 {
  margin-bottom: 4px;
}

.news-section .section-header .section-header-text p {
  margin: 0;
}

.news-more {
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-more:hover {
  color: var(--accent);
}

.news-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  align-items: stretch;
}

.news-feature {
  display: flex;
  flex-direction: column;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
}

.news-feature:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  background: var(--surface-hover);
}

.news-feature-image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.news-feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(0,229,255,0.85);
  color: #0B1226;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.3px;
}

.news-feature-content {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-feature-content h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-feature-content p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-feature-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
}

.news-date {
  color: var(--text-muted);
  font-size: 13px;
}

.news-read-more {
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
}

.news-compact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-compact {
  display: flex;
  align-items: stretch;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  height: 120px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.news-compact:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  background: var(--surface-hover);
}

.news-compact-thumb {
  width: 130px;
  flex-shrink: 0;
  position: relative;
}

.news-compact-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-compact-info {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
  min-width: 0;
}

.news-compact-info h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-compact-info p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

.empty-state {
  width: 100%;
  min-height: 240px;
  border: 1px dashed rgba(255,255,255,0.18);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.01);
}

.empty-state svg {
  width: 36px;
  height: 36px;
  color: var(--text-muted);
}

.empty-state p {
  font-size: 15px;
  color: var(--text-muted);
}

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

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  background: var(--surface-hover);
}

.faq-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  padding: 14px 24px;
  cursor: pointer;
  gap: 16px;
}

.faq-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
}

.faq-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  flex-shrink: 0;
  transition: all 0.3s ease;
}

.faq-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s ease;
}

.faq-item.open .faq-toggle svg {
  transform: rotate(45deg);
  color: var(--accent);
}

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-body-inner {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 14px;
}

/* Member CTA */
.member-section {
  background: var(--bg-main);
}

.member-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-large);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.member-benefits {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid var(--border-glass);
}

.member-benefits h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.25;
}

.member-benefits > .member-sub {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 32px;
}

.benefit-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 24px;
}

.benefit-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.benefit-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,229,255,0.1);
  border: 1px solid rgba(0,229,255,0.2);
  border-radius: 10px;
  color: var(--accent);
  flex-shrink: 0;
}

.benefit-icon svg {
  width: 18px;
  height: 18px;
}

.benefit-text h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 2px;
}

.benefit-text p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.4;
}

.member-form-panel {
  padding: 48px;
  background: rgba(7,12,27,0.3);
}

.member-form-panel h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.member-form-panel > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

.plan-radio-group {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.plan-card {
  flex: 1;
  min-width: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 12px;
  background: rgba(7,12,27,0.35);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: all 0.25s ease;
  text-align: center;
}

.plan-card:hover {
  border-color: rgba(255,255,255,0.2);
}

.plan-card.recommended {
  border-color: rgba(0,229,255,0.4);
  box-shadow: 0 0 16px rgba(0,229,255,0.15);
}

.plan-card.selected {
  border-color: var(--accent);
  box-shadow: var(--glow-shadow);
}

.plan-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.plan-card .plan-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.plan-card .plan-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 8px;
}

.plan-card .plan-price {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.plan-card .rec-tag {
  position: absolute;
  top: -8px;
  right: 8px;
  background: var(--warning);
  color: #1A1A2E;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.3px;
}

.form-group {
  margin-bottom: 16px;
}

.form-input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-input);
  color: var(--text-main);
  font-size: 15px;
  transition: all 0.25s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(0,229,255,0.15);
}

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

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-input {
  flex: 1;
}

.btn-code {
  height: 48px;
  padding: 0 16px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-input);
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-code:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.payment-methods {
  display: flex;
  gap: 10px;
  margin: 20px 0 24px;
}

.payment-icon {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.btn-submit {
  width: 100%;
  height: 52px;
  font-size: 16px;
}

.btn-submit:disabled {
  background: rgba(100,122,158,0.4);
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.6;
}

.form-security {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* Footer */
.site-footer {
  background: #050810;
  padding: 64px 0 32px;
  position: relative;
  z-index: 1;
}

.site-footer::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--primary), var(--accent-2));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-logo-section .brand-logo {
  margin-bottom: 16px;
  padding: 0;
}

.footer-logo-section .brand-logo:hover {
  background: transparent;
}

.footer-logo-section p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  max-width: 240px;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.footer-contact p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 13px;
  margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .header-nav-left,
  .header-nav-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header-logo {
    position: relative;
    transform: none;
    left: auto;
  }

  .nav-container {
    justify-content: space-between;
  }

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

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

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

  .member-panel {
    grid-template-columns: 1fr;
  }

  .member-benefits {
    border-right: none;
    border-bottom: 1px solid var(--border-glass);
  }

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

@media (max-width: 767.98px) {
  .hero {
    padding-top: calc(var(--nav-height) + 20px);
    padding-bottom: 60px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  .hero-stats {
    gap: 20px;
    padding: 16px 20px;
  }

  .highlight-card {
    width: 100%;
    align-self: flex-start !important;
    margin-top: 0 !important;
  }

  .highlights-grid {
    gap: 24px;
  }

  .benefit-list {
    grid-template-columns: 1fr;
  }

  .member-benefits,
  .member-form-panel {
    padding: 32px 24px;
  }

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

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

@media (max-width: 575.98px) {
  .container-custom {
    padding: 0 16px;
  }

  section {
    --section-pad: 48px;
  }

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

  .hero-cta-group .btn-primary,
  .hero-cta-group .btn-secondary {
    width: 100%;
  }

  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

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

  .plan-radio-group {
    flex-direction: column;
  }

  .plan-card {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
  }

  .plan-card .plan-desc {
    margin-bottom: 0;
    order: 3;
    flex: 1;
    text-align: right;
    padding: 0 10px;
  }

  .plan-card .plan-price {
    margin-left: auto;
    font-size: 16px;
  }

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

  .compare-wrap {
    border-radius: 14px;
  }

  .compare-table th,
  .compare-table td {
    padding: 14px 16px;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* roulang page: category1 */
:root {
      --bg-deep: #070C1B;
      --bg-main: #0B1226;
      --surface-glass: rgba(255, 255, 255, 0.045);
      --surface-hover: rgba(255, 255, 255, 0.08);
      --border-glass: rgba(255, 255, 255, 0.10);
      --primary: #2F6BFF;
      --primary-bright: #4D9FFF;
      --accent: #00E5FF;
      --accent-2: #8B5FFF;
      --text-main: #EAF1FF;
      --text-secondary: #9AAAC5;
      --text-muted: #647A9E;
      --success: #2DD4A8;
      --warning: #FFC857;
      --gradient-glow: linear-gradient(135deg, #00E5FF, #2F6BFF 55%, #8B5FFF);
      --glow-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
      --radius-card: 16px;
      --radius-large: 20px;
      --transition: all 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
      background-size: 40px 40px;
      position: relative;
    }

    body::before {
      content: '';
      position: fixed;
      top: -10%;
      left: -10%;
      width: 60vw;
      height: 60vh;
      background: radial-gradient(circle, rgba(0, 229, 255, 0.08) 0%, transparent 60%);
      pointer-events: none;
      z-index: 0;
    }

    body::after {
      content: '';
      position: fixed;
      bottom: -10%;
      right: -10%;
      width: 50vw;
      height: 50vh;
      background: radial-gradient(circle, rgba(139, 95, 255, 0.06) 0%, transparent 60%);
      pointer-events: none;
      z-index: 0;
    }

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

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

    button,
    input {
      font-family: inherit;
    }

    .container-custom {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
      position: relative;
      z-index: 1;
    }

    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 70px;
      z-index: 1000;
      background: rgba(7, 12, 27, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: var(--transition);
    }

    .site-header.scrolled {
      background: rgba(7, 12, 27, 0.95);
    }

    .nav-container {
      height: 70px;
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      max-width: 1400px;
      margin: 0 auto;
      padding: 0 24px;
      gap: 16px;
    }

    .header-nav-left,
    .header-nav-right {
      display: flex;
      align-items: center;
      gap: 8px;
      list-style: none;
    }

    .header-nav-right {
      justify-content: flex-end;
    }

    .header-logo {
      display: flex;
      justify-content: center;
      align-items: center;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 20px;
      color: var(--text-main);
      white-space: nowrap;
    }

    .logo-mark {
      width: 32px;
      height: 32px;
      border-radius: 10px;
      background: var(--gradient-glow);
      display: inline-block;
      position: relative;
      flex-shrink: 0;
      box-shadow: var(--glow-shadow);
    }

    .logo-mark::after {
      content: '';
      position: absolute;
      inset: 3px;
      border-radius: 7px;
      background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none'%3E%3Cpath d='M5 13l4 4L19 7' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/14px no-repeat;
    }

    .logo-text {
      background: var(--gradient-glow);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 44px;
      padding: 0 18px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-link:hover {
      color: var(--accent);
      background: var(--surface-glass);
    }

    .nav-link.active {
      color: var(--text-main);
      background: var(--surface-glass);
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 44px;
      padding: 0 24px;
      border-radius: 999px;
      background: var(--gradient-glow);
      color: #fff;
      font-size: 15px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      box-shadow: var(--glow-shadow);
      transition: var(--transition);
      min-width: 44px;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 30px rgba(0, 229, 255, 0.5);
      color: #fff;
    }

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

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 44px;
      padding: 0 24px;
      border-radius: 999px;
      background: transparent;
      border: 1px solid var(--border-glass);
      color: var(--text-main);
      font-size: 15px;
      font-weight: 500;
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: var(--accent);
      color: var(--accent);
    }

    .header-cta {
      height: 40px;
      font-size: 14px;
      padding: 0 20px;
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      background: var(--surface-glass);
      border: 1px solid var(--border-glass);
      border-radius: 12px;
      cursor: pointer;
      position: absolute;
      right: 16px;
      top: 13px;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      padding: 0;
    }

    .nav-toggle span {
      width: 18px;
      height: 2px;
      background: var(--text-main);
      border-radius: 2px;
      transition: var(--transition);
      display: block;
    }

    .nav-toggle.open span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.open span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.open span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .page-header {
      padding: 140px 0 60px;
      position: relative;
      background:
        linear-gradient(90deg, rgba(7, 12, 27, 0.92) 0%, rgba(7, 12, 27, 0.72) 100%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-bottom: 1px solid var(--border-glass);
    }

    .page-header .page-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 999px;
      background: rgba(0, 229, 255, 0.12);
      border: 1px solid rgba(0, 229, 255, 0.25);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.5px;
      margin-bottom: 20px;
    }

    .page-header h1 {
      font-size: clamp(30px, 5vw, 44px);
      font-weight: 800;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 16px;
      max-width: 720px;
    }

    .page-header .page-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 620px;
      line-height: 1.7;
    }

    .section-card {
      padding: clamp(64px, 8vw, 96px) 0;
      position: relative;
      z-index: 1;
    }

    .section-label {
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 12px;
      display: block;
    }

    .section-title {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 640px;
      line-height: 1.7;
      margin-bottom: 40px;
    }

    .split-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .split-media {
      border-radius: var(--radius-large);
      overflow: hidden;
      position: relative;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
      border: 1px solid var(--border-glass);
    }

    .split-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      aspect-ratio: 16/11;
    }

    .split-content .split-chip {
      display: inline-block;
      padding: 5px 14px;
      border-radius: 999px;
      background: rgba(139, 95, 255, 0.15);
      border: 1px solid rgba(139, 95, 255, 0.3);
      color: #b49aff;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .split-content h2 {
      font-size: clamp(22px, 2.4vw, 30px);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .split-content p {
      color: var(--text-secondary);
      font-size: 16px;
      line-height: 1.75;
      margin-bottom: 16px;
    }

    .split-content .btn-primary {
      margin-top: 12px;
    }

    .feature-list {
      background: var(--bg-main);
      border-top: 1px solid var(--border-glass);
      border-bottom: 1px solid var(--border-glass);
    }

    .feature-row {
      display: flex;
      align-items: flex-start;
      gap: 24px;
      padding: 32px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: var(--transition);
    }

    .feature-row:last-child {
      border-bottom: none;
    }

    .feature-row:hover {
      background: var(--surface-glass);
    }

    .feature-icon {
      width: 52px;
      height: 52px;
      min-width: 52px;
      border-radius: 14px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid rgba(0, 229, 255, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
    }

    .feature-content {
      flex: 1;
    }

    .feature-content h3 {
      font-size: 19px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .feature-content p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 0;
    }

    .related-cards {
      padding: clamp(64px, 8vw, 96px) 0;
    }

    .related-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 40px;
    }

    .related-card {
      display: block;
      background: var(--surface-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-card);
      overflow: hidden;
      transition: var(--transition);
      height: 100%;
    }

    .related-card:hover {
      transform: translateY(-4px);
      background: var(--surface-hover);
      border-color: rgba(0, 229, 255, 0.3);
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
    }

    .related-card img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
    }

    .related-card-body {
      padding: 24px;
    }

    .related-card-body h3 {
      font-size: 19px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .related-card-body p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 0;
    }

    .cta-block {
      padding: 24px 0 80px;
    }

    .cta-panel {
      background: var(--surface-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-large);
      padding: clamp(32px, 5vw, 56px);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      flex-wrap: wrap;
      position: relative;
      overflow: hidden;
    }

    .cta-panel::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--gradient-glow);
    }

    .cta-panel h2 {
      font-size: clamp(22px, 2.5vw, 28px);
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .cta-panel p {
      color: var(--text-secondary);
      font-size: 15px;
      margin-bottom: 0;
    }

    .cta-actions {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .site-footer {
      background: #050810;
      padding: 64px 0 0;
      position: relative;
      z-index: 1;
      border-top: 1px solid var(--border-glass);
    }

    .site-footer::before {
      content: '';
      position: absolute;
      top: -1px;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, var(--accent), var(--primary), var(--accent-2));
      opacity: 0.6;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 48px;
    }

    .footer-logo-section .brand-logo {
      margin-bottom: 16px;
    }

    .footer-logo-section p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
      max-width: 260px;
    }

    .footer-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 20px;
    }

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

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a {
      color: var(--text-secondary);
      font-size: 14px;
      line-height: 1.6;
      padding: 6px 0;
      display: inline-block;
    }

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

    .footer-contact p {
      color: var(--text-secondary);
      font-size: 14px;
      margin-bottom: 10px;
      line-height: 1.6;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding: 20px 0 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
    }

    .footer-bottom p {
      color: var(--text-muted);
      font-size: 13px;
      margin: 0;
    }

    :focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 3px;
      border-radius: 4px;
    }

    @media (max-width: 992px) {
      .nav-container {
        grid-template-columns: 1fr auto;
        height: 60px;
      }

      .site-header {
        height: 60px;
      }

      .header-nav-left,
      .header-nav-right {
        display: none;
      }

      .header-logo {
        justify-content: flex-start;
      }

      .nav-toggle {
        display: flex;
      }

      .nav-menu-mobile {
        display: flex !important;
        flex-direction: column;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(7, 12, 27, 0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 20px 24px 28px;
        gap: 8px;
        border-bottom: 1px solid var(--border-glass);
        z-index: 999;
      }

      .nav-menu-mobile .nav-link {
        justify-content: flex-start;
        font-size: 16px;
        padding: 0 12px;
      }

      .nav-menu-mobile .header-cta {
        margin-top: 12px;
        width: 100%;
      }

      .nav-menu-mobile .header-nav-left,
      .nav-menu-mobile .header-nav-right {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        width: 100%;
      }

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

      .split-media img {
        aspect-ratio: 16/10;
      }

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

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

    @media (max-width: 768px) {
      .page-header {
        padding: 120px 0 50px;
      }

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

      .cta-panel {
        flex-direction: column;
        align-items: flex-start;
        gap: 24px;
      }

      .cta-actions {
        width: 100%;
      }

      .cta-actions .btn-primary,
      .cta-actions .btn-outline {
        flex: 1;
      }

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

      .feature-row {
        flex-direction: column;
        gap: 16px;
        padding: 26px 0;
      }
    }

    @media (max-width: 576px) {
      .container-custom {
        padding: 0 16px;
      }

      .nav-container {
        padding: 0 16px;
      }

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

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

      .page-header {
        padding: 110px 0 40px;
      }

      .section-card {
        padding: 56px 0;
      }

      .related-grid {
        gap: 16px;
      }

      .cta-actions {
        flex-direction: column;
      }

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

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --bg-deep: #070C1B;
            --bg-main: #0B1226;
            --surface-glass: rgba(255, 255, 255, 0.045);
            --surface-hover: rgba(255, 255, 255, 0.08);
            --border-glass: rgba(255, 255, 255, 0.10);
            --primary: #2F6BFF;
            --primary-bright: #4D9FFF;
            --accent: #00E5FF;
            --accent-2: #8B5FFF;
            --text-main: #EAF1FF;
            --text-secondary: #9AAAC5;
            --text-muted: #647A9E;
            --success: #2DD4A8;
            --warning: #FFC857;
            --gradient-glow: linear-gradient(135deg, #00E5FF, #2F6BFF 55%, #8B5FFF);
            --glow-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
            --radius-card: 16px;
            --radius-large: 20px;
            --radius-pill: 999px;
            --space-section: clamp(64px, 8vw, 112px);
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-deep);
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 40px 40px;
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse 60% 40% at 15% 0%, rgba(0, 229, 255, 0.08), transparent),
                radial-gradient(ellipse 50% 40% at 90% 100%, rgba(139, 95, 255, 0.06), transparent);
            pointer-events: none;
            z-index: 0;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        a {
            color: var(--primary-bright);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--accent);
        }
        ul,
        ol {
            padding-left: 1.25rem;
        }
        .container-custom {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        main {
            position: relative;
            z-index: 1;
            flex: 1;
        }

        /* ===== 顶部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 70px;
            display: flex;
            align-items: center;
            background: rgba(7, 12, 27, 0.82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .nav-container {
            max-width: 1240px;
            width: 100%;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 1fr auto 1fr;
            align-items: center;
        }
        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .header-nav-right {
            justify-content: flex-end;
        }
        .nav-link {
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.02em;
            transition: color 0.25s ease;
            position: relative;
            padding: 6px 2px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--text-main);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--gradient-glow);
            border-radius: 2px;
        }
        .header-logo {
            display: flex;
            justify-content: center;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-height: 44px;
        }
        .logo-mark {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--gradient-glow);
            box-shadow: var(--glow-shadow);
            position: relative;
            flex-shrink: 0;
        }
        .logo-mark::after {
            content: '';
            position: absolute;
            inset: 6px;
            border-radius: 5px;
            background: rgba(7, 12, 27, 0.8);
            backdrop-filter: blur(2px);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, #EAF1FF, #FFFFFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }
        .header-cta {
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
            border-radius: var(--radius-pill);
            background: var(--gradient-glow);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            box-shadow: var(--glow-shadow);
            border: none;
            transition: transform 0.2s ease, box-shadow 0.3s ease, filter 0.2s ease;
        }
        .header-cta:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.5);
            filter: brightness(1.1);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            cursor: pointer;
            gap: 5px;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== 移动端导航折叠 ===== */
        @media (max-width: 991.98px) {
            .site-header {
                height: 60px;
            }
            .nav-container {
                grid-template-columns: 1fr auto;
                padding: 0 16px;
            }
            .header-nav-left,
            .header-nav-right {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-logo {
                justify-content: flex-start;
            }
        }
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 60px;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(7, 12, 27, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 24px 28px;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-nav-panel.show {
            display: flex;
        }
        .mobile-nav-panel .nav-link {
            font-size: 16px;
            padding: 14px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .mobile-nav-panel .btn-primary {
            margin-top: 16px;
            justify-content: center;
        }

        /* ===== 按钮组件 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 46px;
            padding: 0 32px;
            border-radius: var(--radius-pill);
            background: var(--gradient-glow);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            box-shadow: var(--glow-shadow);
            transition: transform 0.2s ease, box-shadow 0.3s ease, filter 0.2s ease;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.45);
            filter: brightness(1.08);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 46px;
            padding: 0 32px;
            border-radius: var(--radius-pill);
            background: transparent;
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.18);
            transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            border-color: rgba(255, 255, 255, 0.3);
        }

        /* ===== 徽章 ===== */
        .tag-badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
            color: var(--accent);
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .tag-badge.warning {
            background: rgba(255, 200, 87, 0.1);
            border-color: rgba(255, 200, 87, 0.25);
            color: var(--warning);
        }

        /* ===== 文章页 Hero ===== */
        .article-hero {
            position: relative;
            padding: clamp(48px, 6vw, 80px) 0 clamp(32px, 4vw, 48px);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(7, 12, 27, 0.92) 30%, rgba(7, 12, 27, 0.65) 65%, rgba(7, 12, 27, 0.4) 100%);
        }
        .article-hero .container-custom {
            position: relative;
            z-index: 1;
        }
        .article-hero-content {
            max-width: 860px;
        }
        .article-hero .tag-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 20px;
        }
        .article-hero h1 {
            font-size: clamp(30px, 5vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-main);
            margin-bottom: 18px;
            letter-spacing: 0.01em;
        }
        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: var(--text-secondary);
            font-size: 14px;
            margin-top: 16px;
        }
        .article-meta-row .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-row .meta-dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--text-muted);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-nav {
            padding: 20px 0;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .breadcrumb-nav a {
            color: var(--text-secondary);
        }
        .breadcrumb-nav a:hover {
            color: var(--accent);
        }
        .breadcrumb-nav .sep {
            color: var(--text-muted);
            opacity: 0.6;
        }
        .breadcrumb-nav .current {
            color: var(--text-muted);
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章主体 ===== */
        .article-layout {
            background: transparent;
            padding-bottom: var(--space-section);
        }
        .article-body {
            width: 100%;
        }
        .article-content-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        /* ===== 正文排版 ===== */
        .article-content {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            word-break: break-word;
        }
        .article-content h2 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.3;
            margin: 44px 0 18px;
            padding-top: 8px;
        }
        .article-content h3 {
            font-size: clamp(18px, 2vw, 20px);
            font-weight: 600;
            color: var(--text-main);
            margin: 32px 0 14px;
            line-height: 1.4;
        }
        .article-content p {
            margin-bottom: 18px;
        }
        .article-content a {
            color: var(--accent);
            border-bottom: 1px solid rgba(0, 229, 255, 0.3);
        }
        .article-content a:hover {
            border-bottom-color: var(--accent);
        }
        .article-content blockquote {
            margin: 24px 0;
            padding: 20px 24px;
            background: var(--surface-glass);
            border-left: 3px solid var(--primary);
            border-radius: 0 12px 12px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 20px;
            padding-left: 1.5rem;
        }
        .article-content li {
            margin-bottom: 10px;
        }
        .article-content li::marker {
            color: var(--accent);
        }
        .article-content img {
            border-radius: var(--radius-card);
            margin: 28px 0;
            width: 100%;
            object-fit: cover;
        }
        .article-content hr {
            border: none;
            height: 1px;
            background: rgba(255, 255, 255, 0.08);
            margin: 36px 0;
        }
        .article-content code {
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.15);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--accent);
        }

        /* ===== 无文章空态 ===== */
        .article-not-found {
            max-width: 780px;
            margin: 0 auto;
            padding: 80px 24px;
            text-align: center;
            border: 1px dashed rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-large);
            background: var(--surface-glass);
        }
        .article-not-found .not-found-icon {
            font-size: 48px;
            margin-bottom: 16px;
            display: block;
        }
        .article-not-found h2 {
            font-size: 24px;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 0 0 var(--space-section);
        }
        .related-section .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-head .section-eyebrow {
            font-size: 13px;
            color: var(--accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }
        .section-head h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.25;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--surface-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
            display: block;
            color: var(--text-main);
            text-decoration: none;
            position: relative;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 229, 255, 0.08);
            background: var(--surface-hover);
            color: var(--text-main);
        }
        .related-card .card-thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
        }
        .related-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .related-card:hover .card-thumb img {
            transform: scale(1.04);
        }
        .related-card .card-caption {
            padding: 20px 20px 18px;
        }
        .related-card .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== 返回入口 ===== */
        .back-entry {
            text-align: center;
            padding: 0 0 var(--space-section);
        }
        .back-entry .btn-outline {
            padding: 0 36px;
            min-height: 46px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #050810;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
            z-index: 1;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--accent), var(--primary), var(--accent-2));
            opacity: 0.6;
        }
        .site-footer .container-custom {
            padding-top: 56px;
            padding-bottom: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo-section .brand-logo {
            margin-bottom: 14px;
        }
        .footer-logo-section p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
            max-width: 260px;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.25s ease;
            display: inline-block;
            padding: 4px 0;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-contact p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 8px;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 13px;
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .article-hero h1 {
                font-size: clamp(26px, 4vw, 34px);
            }
        }
        @media (max-width: 767.98px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .article-hero {
                padding-top: 36px;
            }
            .breadcrumb-nav .current {
                max-width: 160px;
            }
            .footer-bottom {
                flex-direction: column;
            }
            .back-entry .btn-outline {
                width: 100%;
                max-width: 280px;
            }
        }
        @media (max-width: 575.98px) {
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 22px;
            }
            .article-content blockquote {
                padding: 16px 18px;
                font-size: 14px;
            }
            .related-card .card-title {
                font-size: 16px;
            }
        }

        /* ===== 焦点可见性 ===== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

/* roulang page: category2 */
:root {
            --bg-deep: #070C1B;
            --bg-main: #0B1226;
            --surface-glass: rgba(255, 255, 255, 0.045);
            --surface-hover: rgba(255, 255, 255, 0.08);
            --border-glass: rgba(255, 255, 255, 0.10);
            --primary: #2F6BFF;
            --primary-bright: #4D9FFF;
            --accent: #00E5FF;
            --accent-2: #8B5FFF;
            --text-main: #EAF1FF;
            --text-secondary: #9AAAC5;
            --text-muted: #647A9E;
            --success: #2DD4A8;
            --warning: #FFC857;
            --gradient-glow: linear-gradient(135deg, #00E5FF, #2F6BFF 55%, #8B5FFF);
            --glow-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
            --radius-card: 16px;
            --radius-panel: 20px;
            --radius-btn: 999px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.30);
            --transition-base: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background: var(--bg-deep);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.7;
            overflow-x: hidden;
            position: relative;
            -webkit-font-smoothing: antialiased;
        }
        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background:
                radial-gradient(ellipse at 20% 0%, rgba(0, 229, 255, 0.08), transparent 50%),
                radial-gradient(ellipse at 80% 100%, rgba(139, 95, 255, 0.06), transparent 50%),
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: auto, auto, 40px 40px, 40px 40px;
        }
        a {
            color: var(--text-main);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            z-index: 1000;
            background: rgba(7, 12, 27, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(7, 12, 27, 0.88);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.30);
        }
        .nav-container {
            max-width: 1400px;
            height: 100%;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }
        .header-nav-left,
        .header-nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            min-width: 360px;
        }
        .header-nav-right {
            justify-content: flex-end;
        }
        .nav-link {
            padding: 10px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 999px;
            min-height: 44px;
            display: inline-flex;
            align-items: center;
            line-height: 1;
            transition: var(--transition-base);
        }
        .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.08);
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
        }
        .header-logo {
            flex-shrink: 0;
            display: flex;
            justify-content: center;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            min-height: 44px;
            padding: 0 4px;
        }
        .logo-mark {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--gradient-glow);
            position: relative;
            box-shadow: var(--glow-shadow);
            flex-shrink: 0;
        }
        .logo-mark::after {
            content: "";
            position: absolute;
            top: 7px;
            left: 7px;
            width: 16px;
            height: 16px;
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.20);
            backdrop-filter: blur(2px);
            -webkit-backdrop-filter: blur(2px);
            border: 1px solid rgba(255, 255, 255, 0.30);
        }
        .logo-text {
            font-size: 19px;
            font-weight: 800;
            letter-spacing: 0.02em;
            background: linear-gradient(135deg, #EAF1FF 0%, #FFFFFF 50%, #A8C4FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 26px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--gradient-glow);
            box-shadow: var(--glow-shadow);
            transition: var(--transition-base);
            border: none;
            line-height: 1;
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.50);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .header-cta {
            padding: 0 24px;
            margin-left: 8px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.10);
            padding: 0 10px;
        }
        .nav-toggle span {
            display: block;
            height: 2px;
            width: 22px;
            background: var(--text-main);
            border-radius: 2px;
            transition: var(--transition-base);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .page-hero {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            padding-top: 70px;
            overflow: hidden;
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
        }
        .page-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 12, 27, 0.92) 0%, rgba(7, 12, 27, 0.75) 55%, rgba(7, 12, 27, 0.40) 100%);
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 72px 24px 64px;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 18px;
        }
        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: var(--transition-base);
        }
        .breadcrumb-nav a:hover {
            color: var(--accent);
        }
        .breadcrumb-nav .separator {
            color: var(--text-muted);
        }
        .breadcrumb-nav .current {
            color: var(--text-main);
            max-width: 200px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .page-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            color: var(--accent);
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid rgba(0, 229, 255, 0.20);
            margin-bottom: 20px;
        }
        .page-badge::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.8);
        }
        .page-hero h1 {
            font-size: clamp(30px, 5vw, 44px);
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.7;
            margin: 0;
        }

        .section {
            padding: clamp(64px, 8vw, 112px) 0;
            position: relative;
            z-index: 1;
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }
        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.15);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .module-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 980px;
            margin: 0 auto;
        }
        .module-card {
            background: var(--surface-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .module-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--gradient-glow);
            opacity: 0;
            transition: var(--transition-base);
        }
        .module-card:hover {
            background: var(--surface-hover);
            border-color: rgba(255, 255, 255, 0.16);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.40);
        }
        .module-card:hover::before {
            opacity: 1;
        }
        .module-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(47, 107, 255, 0.15);
            border: 1px solid rgba(47, 107, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--accent);
        }
        .module-icon svg {
            width: 24px;
            height: 24px;
        }
        .module-card h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .module-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .section-timeline {
            background: var(--bg-main);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .timeline {
            position: relative;
            max-width: 980px;
            margin: 0 auto;
            padding-left: 68px;
        }
        .timeline::before {
            content: "";
            position: absolute;
            left: 22px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent), var(--primary) 60%, transparent);
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: -46px;
            top: 22px;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--bg-main);
            border: 1px solid rgba(0, 229, 255, 0.40);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
            color: var(--accent);
            z-index: 2;
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.20);
        }
        .timeline-card {
            background: var(--surface-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 26px 30px;
            transition: var(--transition-base);
            width: 82%;
        }
        .timeline-card:hover {
            background: var(--surface-hover);
            border-color: rgba(255, 255, 255, 0.16);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .timeline-item:nth-child(even) .timeline-card {
            width: 72%;
            margin-left: 8%;
        }
        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .timeline-card h3 .step-no {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(0, 229, 255, 0.10);
            border-radius: 8px;
            padding: 2px 10px;
        }
        .timeline-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        .section-tips {
            background: var(--bg-deep);
        }
        .tips-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            max-width: 1080px;
            margin: 0 auto;
        }
        .tips-image {
            border-radius: var(--radius-panel);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .tips-image img {
            width: 100%;
            height: 100%;
            min-height: 280px;
            object-fit: cover;
        }
        .tips-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 12, 27, 0.4), transparent 40%);
        }
        .tips-content h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 8px;
        }
        .tips-content>p {
            color: var(--text-secondary);
            margin-bottom: 28px;
            font-size: 16px;
        }
        .tips-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .tips-list li {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 20px;
            background: var(--surface-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            transition: var(--transition-base);
        }
        .tips-list li:hover {
            background: var(--surface-hover);
            border-color: rgba(255, 255, 255, 0.16);
        }
        .tip-num {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid rgba(0, 229, 255, 0.20);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
        }
        .tips-list li strong {
            display: block;
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 2px;
        }
        .tips-list li p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        .section-cta {
            background: var(--bg-main);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: clamp(56px, 7vw, 96px) 0;
        }
        .cta-panel {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-panel);
            padding: 56px 40px;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 2px;
            background: var(--gradient-glow);
            border-radius: 2px;
        }
        .cta-panel h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-panel p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-panel .btn-primary {
            min-height: 52px;
            padding: 0 40px;
            font-size: 16px;
        }

        .site-footer {
            background: #050810;
            border-top: none;
            position: relative;
            z-index: 1;
            padding: 64px 0 32px;
        }
        .site-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(to right, var(--accent), var(--primary), var(--accent-2));
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .brand-logo {
            margin-bottom: 12px;
        }
        .footer-logo-section p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 260px;
            margin: 0;
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition-base);
            display: inline-flex;
            min-height: 32px;
            align-items: center;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 8px;
            line-height: 1.6;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-muted);
            margin: 0;
        }

        @media (max-width: 1199px) {
            .nav-container {
                max-width: 100%;
                padding: 0 16px;
            }
            .header-nav-left,
            .header-nav-right {
                min-width: auto;
                gap: 2px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
        }
        @media (max-width: 991px) {
            .site-header {
                height: 60px;
            }
            .nav-toggle {
                display: flex;
                position: absolute;
                right: 16px;
                top: 50%;
                transform: translateY(-50%);
            }
            .header-nav-left,
            .header-nav-right {
                display: none;
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(7, 12, 27, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 16px 20px 24px;
                border-bottom: 1px solid var(--border-glass);
                gap: 6px;
                z-index: 999;
                min-width: auto;
            }
            .header-nav-right {
                top: auto;
                border-top: 1px solid rgba(255, 255, 255, 0.04);
            }
            .header-nav-left.open,
            .header-nav-right.open {
                display: flex;
            }
            .nav-link {
                font-size: 15px;
                padding: 12px 16px;
                min-height: 48px;
                border-radius: 12px;
            }
            .header-nav-right .nav-link {
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
                border-radius: 0;
            }
            .header-nav-right .btn-primary {
                margin-top: 12px;
                width: 100%;
                min-height: 48px;
            }
            .header-logo {
                position: absolute;
                left: 16px;
                top: 50%;
                transform: translateY(-50%);
            }
            .logo-text {
                font-size: 17px;
            }
            .page-hero {
                min-height: 340px;
            }
            .page-hero .hero-content {
                padding: 64px 16px 48px;
            }
            .module-grid {
                grid-template-columns: 1fr 1fr;
            }
            .timeline {
                padding-left: 48px;
            }
            .timeline-dot {
                left: -30px;
                width: 28px;
                height: 28px;
                font-size: 10px;
            }
            .timeline-card {
                width: 92%;
            }
            .timeline-item:nth-child(even) .timeline-card {
                width: 84%;
                margin-left: 4%;
            }
            .tips-row {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .tips-image {
                min-height: 240px;
            }
        }
        @media (max-width: 767px) {
            .container-custom {
                padding: 0 16px;
            }
            .module-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .module-card {
                padding: 24px 20px;
            }
            .timeline {
                padding-left: 40px;
            }
            .timeline-dot {
                left: -26px;
                width: 24px;
                height: 24px;
                font-size: 9px;
            }
            .timeline-card,
            .timeline-item:nth-child(even) .timeline-card {
                width: 100%;
                margin-left: 0;
                padding: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-logo-section {
                grid-column: 1 / -1;
            }
            .section-head {
                margin-bottom: 36px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .cta-panel {
                padding: 40px 24px;
            }
        }
        @media (max-width: 575px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .tips-list li {
                flex-direction: column;
                gap: 8px;
            }
            .brand-logo .logo-text {
                font-size: 16px;
            }
            .page-badge {
                font-size: 12px;
                padding: 5px 12px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition: none !important;
                scroll-behavior: auto !important;
            }
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
:root {
  --bg-deep: #070C1B;
  --bg-main: #0B1226;
  --surface-glass: rgba(255, 255, 255, 0.045);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.10);
  --primary: #2F6BFF;
  --primary-bright: #4D9FFF;
  --accent: #00E5FF;
  --accent-2: #8B5FFF;
  --text-main: #EAF1FF;
  --text-secondary: #9AAAC5;
  --text-muted: #647A9E;
  --success: #2DD4A8;
  --warning: #FFC857;
  --gradient-glow: linear-gradient(135deg, #00E5FF, #2F6BFF 55%, #8B5FFF);
  --glow-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
  --radius-card: 16px;
  --radius-panel: 20px;
  --radius-btn: 999px;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --header-height: 70px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(0, 229, 255, 0.08), transparent 60%),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(139, 95, 255, 0.06), transparent 60%),
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: auto, auto, 40px 40px, 40px 40px;
  background-attachment: fixed;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,12,27,0.35) 0%, rgba(7,12,27,0.15) 40%, rgba(7,12,27,0.45) 100%);
  pointer-events: none;
  z-index: 0;
}
img {
  max-width: 100%;
  height: auto;
}
a {
  color: var(--primary-bright);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--accent);
}
button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.container-custom {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  margin-top: 0;
}
h1 {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1.18;
}
h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}
h3 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 14px;
}
p {
  margin-bottom: 16px;
  color: var(--text-secondary);
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(7, 12, 27, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
}
.nav-container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.header-nav-left,
.header-nav-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
}
.header-nav-left {
  justify-content: flex-start;
}
.header-nav-right {
  justify-content: flex-end;
}
.header-nav-left .nav-link,
.header-nav-right .nav-link {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.header-nav-left .nav-link:hover,
.header-nav-right .nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}
.header-nav-left .nav-link.active,
.header-nav-right .nav-link.active {
  color: var(--accent);
  background: rgba(0, 229, 255, 0.08);
}
.header-logo {
  flex-shrink: 0;
  display: flex;
  justify-content: center;
}
.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 4px;
}
.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient-glow);
  position: relative;
  box-shadow: 0 0 16px rgba(0, 229, 255, 0.35);
}
.logo-mark::before {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 7px;
  background: var(--bg-deep);
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0,229,255,0.4), transparent 50%, rgba(139,95,255,0.3));
  opacity: 0.6;
}
.logo-text {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #FFFFFF 0%, #A8F8FF 60%, #00E5FF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.header-cta {
  margin-left: 8px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  cursor: pointer;
  padding: 10px;
  transition: border-color 0.2s, background 0.2s;
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text-main);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-4px) rotate(-45deg);
}
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(7, 12, 27, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 12px;
  z-index: 999;
  box-shadow: 0 30px 60px rgba(0,0,0,0.4);
}
.mobile-nav.open {
  display: flex;
}
.mobile-nav a {
  padding: 12px 16px;
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 16px;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}
.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--accent);
  background: rgba(0, 229, 255, 0.07);
}
.mobile-nav .btn-primary {
  text-align: center;
  margin-top: 4px;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 32px;
  border-radius: 999px;
  background: var(--gradient-glow);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
  transition: transform 0.2s, box-shadow 0.3s, opacity 0.2s;
  text-decoration: none;
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0, 229, 255, 0.4);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 28px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  text-decoration: none;
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(0, 229, 255, 0.3);
  color: var(--accent);
}

/* ===== Page Hero (Category 3) ===== */
.category-page-hero {
  position: relative;
  padding: clamp(72px, 10vw, 120px) 0 56px;
  background-color: var(--bg-main);
  overflow: hidden;
}
.category-page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 30%;
  opacity: 0.35;
}
.category-page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(7,12,27,0.9) 35%, rgba(7,12,27,0.55) 75%, rgba(7,12,27,0.75) 100%);
}
.category-page-hero .container-custom {
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.25);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}
.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 8px var(--success);
}
.category-page-hero h1 {
  max-width: 700px;
  margin-bottom: 12px;
}
.category-page-hero .hero-subtitle {
  max-width: 620px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 0;
}
.hero-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.hero-meta-item svg {
  flex-shrink: 0;
}

/* ===== Anchor Layout ===== */
.anchor-layout-section {
  padding: clamp(56px, 6vw, 88px) 0;
  background: transparent;
  position: relative;
}
.anchor-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 48px;
  align-items: start;
}
.anchor-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-panel);
  padding: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.anchor-sidebar .sidebar-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 1px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.anchor-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.anchor-menu li {
  margin: 0;
}
.anchor-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: background 0.2s, color 0.2s, padding-left 0.25s;
}
.anchor-menu a .anchor-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  transition: color 0.2s;
}
.anchor-menu a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  padding-left: 18px;
}
.anchor-menu a.active {
  background: rgba(0, 229, 255, 0.08);
  color: var(--accent);
}
.anchor-menu a.active .anchor-num {
  color: var(--accent);
}

/* ===== Content Sections ===== */
.anchor-content {
  min-width: 0;
}
.content-section {
  margin-bottom: clamp(40px, 5vw, 64px);
  scroll-margin-top: 110px;
}
.content-section:last-child {
  margin-bottom: 0;
}
.content-section-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.content-section-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--accent);
}
.content-section-head h2 {
  margin-bottom: 4px;
  font-size: clamp(22px, 2.5vw, 28px);
}
.content-section-head .section-subtitle {
  font-size: 14px;
  color: var(--text-muted);
}
.content-block {
  padding-left: 56px;
}
.content-block h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  margin-bottom: 10px;
}
.content-block h3::before {
  content: "";
  width: 5px;
  height: 18px;
  border-radius: 3px;
  background: var(--gradient-glow);
  flex-shrink: 0;
}
.content-block p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 20px;
}
.tip-callout {
  display: flex;
  gap: 14px;
  padding: 16px 20px;
  background: rgba(255, 200, 87, 0.06);
  border: 1px solid rgba(255, 200, 87, 0.15);
  border-radius: 14px;
  margin-top: 8px;
  margin-bottom: 24px;
}
.tip-callout svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--warning);
}
.tip-callout p {
  margin-bottom: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== Security Strip ===== */
.security-strip {
  background: var(--bg-main);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: clampi(48px, 6vw, 80px) 0;
  position: relative;
}
.security-strip .strip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.security-item {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.security-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
  border-color: rgba(0, 229, 255, 0.25);
}
.security-item .sec-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(139, 95, 255, 0.12));
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--accent);
}
.security-item .sec-label {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
}
.security-item .sec-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
}
.security-item .sec-strong {
  font-size: 13px;
  color: var(--success);
  font-weight: 600;
}

/* ===== FAQ Reset Override ===== */
.faq-section {
  padding: clamp(56px, 6vw, 88px) 0;
  background: transparent;
}
.faq-heading {
  text-align: center;
  margin-bottom: 40px;
}
.faq-heading h2 {
  margin-bottom: 8px;
}
.faq-heading p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}
.faq-accordion-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.accordion-item {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.accordion-item:hover {
  border-color: rgba(0, 229, 255, 0.22);
}
.accordion-button {
  background: transparent;
  color: var(--text-main);
  font-size: 16px;
  font-weight: 600;
  padding: 18px 24px;
  box-shadow: none;
  min-height: 56px;
  transition: color 0.2s;
}
.accordion-button:not(.collapsed) {
  background: rgba(0, 229, 255, 0.04);
  color: var(--accent);
}
.accordion-button:focus {
  box-shadow: none;
  border-color: transparent;
}
.accordion-button::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5FF'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
  transition: transform 0.35s;
  width: 16px;
  height: 16px;
}
.accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300E5FF'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
}
.accordion-body {
  padding: 4px 24px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}
.accordion-body p:last-child {
  margin-bottom: 0;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: clamp(56px, 6vw, 88px) 0;
  position: relative;
}
.cta-panel {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(139, 95, 255, 0.06));
  border: 1px solid rgba(0, 229, 255, 0.18);
  padding: clamp(40px, 5vw, 64px);
  text-align: center;
  overflow: hidden;
}
.cta-panel::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), transparent 40%, rgba(139, 95, 255, 0.15));
  pointer-events: none;
}
.cta-panel .cta-content {
  position: relative;
  z-index: 1;
}
.cta-panel h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  margin-bottom: 12px;
}
.cta-panel p {
  max-width: 560px;
  margin: 0 auto 28px;
  color: var(--text-secondary);
  font-size: 16px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Footer ===== */
.site-footer {
  background: #050810;
  border-top: 1px solid transparent;
  position: relative;
  padding: 64px 0 0;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--primary), var(--accent-2));
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-logo-section .brand-logo {
  margin-bottom: 12px;
}
.footer-logo-section p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 12px;
  max-width: 240px;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Back to Top ===== */
.back-top-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s, color 0.2s, background 0.2s;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.back-top-btn.visible {
  opacity: 1;
  visibility: visible;
}
.back-top-btn:hover {
  color: var(--accent);
  background: rgba(0, 229, 255, 0.1);
}

/* ===== Responsive ===== */
@media (max-width: 1199.98px) {
  .anchor-layout {
    grid-template-columns: 230px 1fr;
    gap: 32px;
  }
}
@media (max-width: 991.98px) {
  :root {
    --header-height: 60px;
  }
  .header-nav-left,
  .header-nav-right {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .site-header .nav-container {
    justify-content: space-between;
  }
  .header-logo {
    flex: 1;
    justify-content: center;
  }
  .nav-toggle {
    order: 3;
  }
  .anchor-layout {
    grid-template-columns: 1fr;
  }
  .anchor-sidebar {
    position: static;
    top: auto;
    margin-bottom: 8px;
    overflow-x: auto;
  }
  .anchor-menu {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 4px;
  }
  .anchor-menu a {
    white-space: nowrap;
    padding: 8px 14px;
    font-size: 14px;
  }
  .anchor-menu a:hover {
    padding-left: 14px;
  }
  .content-block {
    padding-left: 0;
  }
  .security-strip .strip-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 575.98px) {
  .container-custom {
    padding: 0 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .content-section-head {
    flex-direction: column;
  }
  .content-section-icon {
    margin-bottom: 4px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-actions .btn-primary,
  .cta-actions .btn-secondary {
    width: 100%;
  }
}