/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --bg-primary: #081120;
  --bg-secondary: #101C2E;
  --bg-glass: rgba(15, 25, 45, 0.65);
  --border-glass: rgba(255, 255, 255, 0.10);
  --accent-primary: #2E7DFF;
  --accent-secondary: #00D4AA;
  --text-primary: #F0F5FC;
  --text-secondary: #8FA3BF;
  --text-muted: #5A6C85;
  --glow-blue: rgba(46, 125, 255, 0.5);
  --glow-cyan: rgba(0, 212, 170, 0.35);
  --radius-card: 14px;
  --radius-btn: 10px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.35);
  --space-section: 96px;
  --container-max: 1200px;
}
/* ===== 基础 Reset ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
input,
textarea {
  font-family: inherit;
}
ul,
ol {
  list-style: none;
}
/* ===== 容器 ===== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
/* ===== 网格背景纹理 ===== */
.section {
  position: relative;
}
.section::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
}
/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background: rgba(8, 17, 32, 0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.site-header.scrolled {
  background: rgba(8, 17, 32, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  white-space: nowrap;
}
.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(46, 125, 255, 0.3), rgba(0, 212, 170, 0.2));
  border: 1px solid rgba(0, 212, 170, 0.35);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.main-nav .nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 2px;
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
}
.main-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  border-radius: 2px;
  transition: width 0.3s ease, left 0.3s ease, background 0.3s ease;
}
.main-nav .nav-link:hover {
  color: var(--text-primary);
}
.main-nav .nav-link:hover::after {
  width: 100%;
  left: 0;
}
.main-nav .nav-link.active {
  color: var(--text-primary);
}
.main-nav .nav-link.active::after {
  width: 100%;
  left: 0;
  background: var(--accent-secondary);
}
.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  margin: 0 auto;
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: rgba(8, 17, 32, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px;
  z-index: 998;
  flex-direction: column;
  gap: 6px;
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu .mobile-link {
  display: block;
  padding: 14px 12px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: background 0.2s ease, color 0.2s ease;
}
.mobile-menu .mobile-link:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}
.mobile-menu .mobile-link.active {
  color: var(--accent-secondary);
}
.mobile-menu .mobile-cta {
  display: block;
  text-align: center;
  margin-top: 10px;
}
/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  padding: 14px 30px;
  transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.25s ease, border-color 0.3s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 0 12px var(--glow-blue);
}
.btn-primary:hover {
  background: #1677FF;
  box-shadow: 0 0 20px rgba(46, 125, 255, 0.7);
  transform: translateY(-2px);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.28);
  transform: translateY(-2px);
}
.btn-ghost:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}
.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}
.btn-lg {
  padding: 16px 40px;
  font-size: 17px;
}
.btn-glow {
  box-shadow: 0 0 12px var(--glow-blue);
}
.btn-glow:hover {
  box-shadow: 0 0 24px rgba(46, 125, 255, 0.75);
}
/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(8, 17, 32, 0.82) 0%, rgba(8, 17, 32, 0.55) 50%, rgba(8, 17, 32, 0.78) 100%);
  z-index: 1;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
}
.hero::after {
  content: '';
  position: absolute;
  top: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  z-index: 1;
  background: radial-gradient(circle, rgba(46, 125, 255, 0.35) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}
.hero-container-glow {
  position: absolute;
  bottom: 20%;
  right: -5%;
  width: 400px;
  height: 400px;
  z-index: 1;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.2) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}
.hero-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  max-width: 800px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: #BBD4F5;
  background: rgba(46, 125, 255, 0.15);
  border: 1px solid rgba(46, 125, 255, 0.3);
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.hero-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  box-shadow: 0 0 8px var(--glow-cyan);
}
.hero-title {
  font-size: clamp(30px, 4.5vw, 58px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.title-line-1 {
  display: block;
  color: #fff;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
}
.title-line-2 {
  display: block;
  background: linear-gradient(90deg, #4C9BFF 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-subtitle {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-info {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 100%;
  max-width: 1000px;
  padding-left: 20px;
  padding-right: 20px;
}
.hero-info-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.info-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 40px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(15, 25, 45, 0.65);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  box-shadow: var(--shadow-card);
}
.info-item .info-icon {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  box-shadow: 0 0 6px var(--glow-cyan);
  display: inline-block;
}
/* ===== 通用区块标题 ===== */
.section-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 1;
}
.section-head {
  margin-bottom: 52px;
  text-align: center;
}
.section-head .section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-secondary);
  margin-bottom: 12px;
}
.section-head h2 {
  font-size: clamp(22px, 2.5vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}
/* ===== 三步流程 ===== */
.steps-section {
  padding: var(--space-section) 0;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}
.steps-section::before {
  content: '';
  position: absolute;
  top: 20%;
  right: -10%;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(46, 125, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
  z-index: 1;
}
.steps-grid::before {
  content: '';
  position: absolute;
  top: 44px;
  left: 16.66%;
  right: 16.66%;
  height: 2px;
  background: repeating-linear-gradient(90deg, rgba(46, 125, 255, 0.35) 0px, rgba(46, 125, 255, 0.35) 6px, transparent 6px, transparent 12px);
  z-index: 0;
}
.step-item {
  text-align: center;
  position: relative;
  z-index: 1;
  transition: transform 0.3s ease;
}
.step-item:hover {
  transform: translateY(-4px);
}
.step-number {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px solid rgba(46, 125, 255, 0.4);
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: rgba(46, 125, 255, 0.7);
  margin: 0 auto 18px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, color 0.3s ease;
}
.step-item:hover .step-number {
  border-color: var(--accent-secondary);
  box-shadow: 0 0 16px rgba(0, 212, 170, 0.35);
  color: var(--accent-secondary);
}
.step-card {
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 28px 24px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.step-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}
.step-item:hover .step-card {
  border-color: rgba(0, 212, 170, 0.45);
  box-shadow: var(--shadow-hover);
}
.step-card .step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(46, 125, 255, 0.12);
  margin-bottom: 16px;
}
.step-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}
/* ===== 案例与数据 ===== */
.evidence-section {
  padding: var(--space-section) 0;
  background: var(--bg-primary);
}
.stats-wall {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 40px 32px;
  margin-bottom: 48px;
  position: relative;
  overflow: hidden;
}
.stats-wall::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-size: clamp(30px, 3vw, 44px);
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.stat-number span {
  color: var(--accent-secondary);
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}
.case-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.case-card {
  display: flex;
  align-items: stretch;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
}
.case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
  z-index: 2;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.case-card .case-image {
  width: 45%;
  background-size: cover;
  background-position: center;
  position: relative;
  min-height: 220px;
  aspect-ratio: 4 / 3;
}
.case-card .case-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 60%, rgba(8, 17, 32, 0.3) 100%);
}
.case-card:nth-child(2) .case-image::after {
  background: linear-gradient(270deg, transparent 60%, rgba(8, 17, 32, 0.3) 100%);
}
.case-content {
  flex: 1;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.case-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}
.case-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 18px;
}
.case-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.25s ease;
}
.case-link:hover {
  gap: 10px;
}
/* ===== 资讯列表 ===== */
.news-section {
  padding: var(--space-section) 0;
  background: var(--bg-secondary);
  position: relative;
}
.news-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  z-index: 1;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  box-shadow: var(--shadow-card);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
  overflow: hidden;
}
.news-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-primary);
  opacity: 0;
  transition: opacity 0.25s ease;
}
.news-item:hover {
  background: rgba(20, 32, 54, 0.8);
  border-color: rgba(46, 125, 255, 0.3);
  transform: translateX(4px);
  box-shadow: var(--shadow-hover);
}
.news-item:hover::before {
  opacity: 1;
}
.news-badge {
  flex-shrink: 0;
  display: inline-block;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  color: #7DABF0;
  background: rgba(46, 125, 255, 0.15);
  border-radius: 999px;
  white-space: nowrap;
}
.news-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.news-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-bottom: 6px;
}
.news-time {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.news-time::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-muted);
  display: inline-block;
}
.news-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
  background: var(--bg-glass);
  border: 1px dashed var(--border-glass);
  border-radius: var(--radius-card);
}
.news-empty svg {
  margin: 0 auto 12px;
  opacity: 0.4;
}
.news-empty p {
  font-size: 15px;
}
/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-primary);
}
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.faq-item.active {
  border-color: rgba(0, 212, 170, 0.4);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
}
.faq-question .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  color: var(--text-secondary);
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
}
.faq-answer-wrap {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}
.faq-item.active .faq-answer-wrap {
  grid-template-rows: 1fr;
}
.faq-answer {
  overflow: hidden;
}
.faq-answer-inner {
  padding: 0 20px 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}
/* ===== CTA 底部 ===== */
.cta-section {
  padding: var(--space-section) 0;
  background: var(--bg-secondary);
  position: relative;
}
.cta-panel {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(15, 25, 45, 0.9) 0%, rgba(15, 25, 45, 0.75) 100%);
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  border: 1px solid rgba(46, 125, 255, 0.25);
  border-radius: 18px;
  padding: 56px 40px;
  text-align: center;
  box-shadow: 0 0 40px rgba(46, 125, 255, 0.15);
  overflow: hidden;
}
.cta-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}
.cta-panel::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.cta-panel h2 {
  font-size: clamp(24px, 2.5vw, 34px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.cta-panel > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.cta-panel .btn {
  position: relative;
  z-index: 2;
}
/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-glass);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .brand {
  font-size: 20px;
  margin-bottom: 14px;
  display: inline-flex;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 260px;
}
.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-links a:hover {
  color: var(--accent-secondary);
  padding-left: 4px;
}
.footer-contact p {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
/* ===== @supports 回退 ===== */
@supports not (backdrop-filter: blur(1px)) {
  .site-header,
  .hero-info-bar .info-item,
  .step-card,
  .stats-wall,
  .case-card,
  .news-item,
  .faq-item,
  .cta-panel,
  .mobile-menu {
    background: rgba(15, 25, 45, 0.92);
  }
  .btn-ghost {
    background: rgba(15, 25, 45, 0.92);
  }
}
/* ===== 响应式 Tablet 768-1023px ===== */
@media (max-width: 1023px) {
  .main-nav {
    gap: 20px;
  }
  .main-nav .nav-link {
    font-size: 14px;
  }
  .stats-wall {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 24px;
  }
  .case-cards {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .case-card .case-image {
    width: 40%;
    min-height: 200px;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .steps-grid::before {
    display: none;
  }
  .step-item:nth-child(3) {
    grid-column: 1 / -1;
    max-width: 70%;
    margin: 0 auto;
  }
  .space-section {
    --space-section: 80px;
  }
}
/* ===== 响应式 Mobile < 768px ===== */
@media (max-width: 767px) {
  .header-inner {
    height: 60px;
  }
  .main-nav,
  .header-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .mobile-menu {
    top: 60px;
  }
  .hero {
    padding-top: 60px;
    min-height: auto;
    padding-bottom: 200px;
  }
  .hero-title {
    font-size: 28px;
    line-height: 1.25;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-info {
    bottom: 32px;
  }
  .hero-info-bar {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .info-item {
    justify-content: center;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    position: relative;
    padding-left: 0;
  }
  .steps-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  .steps-grid::before {
    display: none;
  }
  .step-item {
    display: flex;
    gap: 20px;
    text-align: left;
    padding-bottom: 28px;
    position: relative;
  }
  .step-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 35px;
    top: 76px;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, rgba(46, 125, 255, 0.3), rgba(0, 212, 170, 0.2));
  }
  .step-number {
    width: 70px;
    height: 70px;
    margin: 0;
    flex-shrink: 0;
  }
  .step-card {
    flex: 1;
    padding: 20px;
  }
  .stats-wall {
    grid-template-columns: 1fr 1fr;
    padding: 28px 20px;
    gap: 28px 16px;
  }
  .stat-number {
    font-size: 28px;
  }
  .case-card {
    flex-direction: column;
  }
  .case-card .case-image {
    width: 100%;
    min-height: 160px;
    aspect-ratio: 16 / 9;
  }
  .case-card:nth-child(2) {
    flex-direction: column;
  }
  .case-content {
    padding: 20px;
  }
  .news-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 16px;
  }
  .news-title {
    white-space: normal;
  }
  .news-badge {
    align-self: flex-start;
  }
  .faq-question {
    padding: 16px;
    font-size: 15px;
  }
  .cta-panel {
    padding: 36px 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }
  .footer-bottom .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
  .section {
    --space-section: 56px;
  }
  .case-link {
    font-size: 14px;
  }
}
/* ===== 无障碍焦点 ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 2px;
}

/* roulang page: category1 */
:root {
  --bg-primary: #081120;
  --bg-secondary: #101C2E;
  --bg-glass: rgba(15, 25, 45, 0.65);
  --border-glass: rgba(255, 255, 255, 0.10);
  --accent-primary: #2E7DFF;
  --accent-secondary: #00D4AA;
  --text-primary: #F0F5FC;
  --text-secondary: #8FA3BF;
  --text-muted: #5A6C85;
  --glow-blue: rgba(46, 125, 255, 0.5);
  --glow-cyan: rgba(0, 212, 170, 0.35);
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

/* ===== 网格背景 ===== */
body::after {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background: rgba(8, 17, 32, 0.55);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(8, 17, 32, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  white-space: nowrap;
}

.brand:hover {
  opacity: 0.9;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(0, 212, 170, 0.12);
  border: 1px solid rgba(0, 212, 170, 0.25);
  border-radius: 10px;
  flex-shrink: 0;
}

.brand-text {
  background: linear-gradient(135deg, #FFFFFF 40%, #9FE8D8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.main-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 10px 16px;
  border-radius: 8px;
  position: relative;
  transition: color 0.25s ease, background 0.25s ease;
}

.main-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.main-nav .nav-link:hover {
  color: var(--text-primary);
}

.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
  transform: scaleX(1);
}

.main-nav .nav-link.active {
  color: var(--text-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--accent-primary);
  border-radius: var(--radius-btn);
  box-shadow: 0 0 12px var(--glow-blue);
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  white-space: nowrap;
  margin-left: 12px;
}

.nav-cta:hover {
  background: #1677FF;
  box-shadow: 0 0 20px rgba(46, 125, 255, 0.7);
  transform: translateY(-1px);
}

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

/* 汉堡按钮 */
.burger {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.burger:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.burger svg {
  display: block;
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
    padding: 0 16px;
  }

  .brand {
    font-size: 18px;
  }

  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background: rgba(8, 17, 32, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transform: translateY(-110%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  }

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

  .main-nav .nav-link {
    display: block;
    padding: 14px 12px;
    font-size: 16px;
    border-radius: 10px;
  }

  .main-nav .nav-link::after {
    display: none;
  }

  .main-nav .nav-link.active {
    background: rgba(46, 125, 255, 0.15);
    color: var(--text-primary);
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 12px;
    justify-content: center;
  }

  .burger {
    display: inline-flex;
  }

  .header-right {
    display: flex;
    align-items: center;
    gap: 8px;
  }
}

.header-right {
  display: flex;
  align-items: center;
}

/* ===== 分类页 Hero ===== */
.page-hero {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 24px 60px;
  background:
    linear-gradient(135deg, rgba(8, 17, 32, 0.92) 0%, rgba(16, 28, 46, 0.88) 100%),
    radial-gradient(circle at 20% 30%, rgba(46, 125, 255, 0.22), transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0, 212, 170, 0.16), transparent 45%),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.35);
  z-index: 1;
}

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

.page-hero .hero-tag {
  display: inline-block;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: var(--radius-tag);
  margin-bottom: 20px;
  letter-spacing: 0.04em;
}

.page-hero h1 {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.page-hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-hero p.subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: var(--bg-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding: 12px 0;
}

.breadcrumb-bar .container {
  display: flex;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.breadcrumb-bar a {
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

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

.breadcrumb-bar .sep {
  margin: 0 10px;
  color: var(--text-muted);
  opacity: 0.6;
}

.breadcrumb-bar .current {
  color: var(--text-primary);
}

/* ===== 板块通用 ===== */
.section {
  padding: 88px 0;
  position: relative;
}

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

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-head .section-kicker {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(22px, 2.5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 核心流程 ===== */
.process-section {
  background: var(--bg-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.steps-row {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 20px;
  position: relative;
  flex-wrap: wrap;
}

.step-card {
  flex: 1;
  min-width: 240px;
  max-width: 350px;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 32px 28px;
  position: relative;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.step-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  right: 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 170, 0.35);
  box-shadow: var(--shadow-hover);
}

.step-number {
  font-size: 42px;
  font-weight: 700;
  color: rgba(46, 125, 255, 0.4);
  line-height: 1;
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 68px;
  height: 68px;
  border: 2px solid rgba(46, 125, 255, 0.3);
  border-radius: 50%;
  transition: color 0.3s ease, text-shadow 0.3s ease, border-color 0.3s ease;
  font-variant-numeric: tabular-nums;
}

.step-card:hover .step-number {
  color: var(--accent-secondary);
  border-color: rgba(0, 212, 170, 0.5);
  text-shadow: 0 0 16px var(--glow-cyan);
}

.step-icon {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  background: rgba(46, 125, 255, 0.12);
  border-radius: 12px;
  margin-bottom: 16px;
}

.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 虚线连接（桌面） */
@media (min-width: 769px) {
  .steps-row {
    gap: 4px;
  }

  .steps-row .step-card:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -24px;
    width: 24px;
    height: 0;
    border-top: 2px dashed rgba(46, 125, 255, 0.35);
    z-index: 0;
  }
}

/* ===== 图文横排模块 ===== */
.feature-block {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 72px;
}

.feature-block:last-child {
  margin-bottom: 0;
}

.feature-block.reversed {
  flex-direction: row-reverse;
}

.feature-image {
  flex: 0 0 46%;
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
  position: relative;
  background: var(--bg-secondary);
}

.feature-image img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.feature-image:hover img {
  transform: scale(1.02);
}

.feature-content {
  flex: 1;
}

.feature-content .feature-tag {
  display: inline-block;
  padding: 5px 14px;
  font-size: 12px;
  color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.1);
  border-radius: var(--radius-tag);
  letter-spacing: 0.03em;
  margin-bottom: 16px;
  border: 1px solid rgba(0, 212, 170, 0.15);
}

.feature-content h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  line-height: 1.4;
}

.feature-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.feature-list {
  margin-top: 16px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 10px;
  line-height: 1.6;
}

.feature-list li svg {
  flex-shrink: 0;
  margin-top: 4px;
}

@media (max-width: 768px) {
  .feature-block,
  .feature-block.reversed {
    flex-direction: column;
    gap: 24px;
  }

  .feature-image {
    flex: 0 0 auto;
    width: 100%;
  }

  .feature-content h3 {
    font-size: 20px;
  }
}

/* ===== 分割线 ===== */
.section-divider {
  max-width: 200px;
  margin: 0 auto 56px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46, 125, 255, 0.4), rgba(0, 212, 170, 0.4), transparent);
  border: none;
}

/* ===== 数据卡 ===== */
.data-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.data-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.data-card:hover {
  border-color: rgba(0, 212, 170, 0.3);
  transform: translateY(-3px);
}

.data-card .number {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent-primary);
  line-height: 1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.data-card .number span {
  color: var(--accent-secondary);
}

.data-card .label {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

@media (max-width: 768px) {
  .data-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

/* ===== 准备清单 ===== */
.checklist-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.checklist-card {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.checklist-card:hover {
  border-color: rgba(46, 125, 255, 0.3);
  transform: translateY(-3px);
}

.checklist-card h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.checklist-card h4 .check-icon {
  display: inline-flex;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(0, 212, 170, 0.12);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.checklist-card ul {
  margin-top: 4px;
}

.checklist-card li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 0;
  padding-left: 22px;
  position: relative;
  line-height: 1.6;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.checklist-card li:last-child {
  border-bottom: none;
}

.checklist-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  background: rgba(46, 125, 255, 0.2);
  border: 1px solid rgba(46, 125, 255, 0.4);
}

@media (max-width: 768px) {
  .checklist-grid {
    grid-template-columns: 1fr;
  }
}

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

.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
  transition: border-color 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  gap: 16px;
  transition: color 0.2s ease;
}

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

.faq-toggle {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  border-color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.1);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.faq-item.active .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
}

.faq-answer-inner p {
  padding: 0 20px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
}

.cta-panel {
  position: relative;
  background: linear-gradient(135deg, rgba(20, 40, 70, 0.7), rgba(16, 32, 55, 0.8));
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border-radius: 20px;
  padding: 56px 48px;
  text-align: center;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.35), inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.cta-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 170, 0.5), rgba(46, 125, 255, 0.5), transparent);
}

.cta-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 120%, rgba(0, 212, 170, 0.12), transparent 60%);
  pointer-events: none;
}

.cta-panel .container-relative {
  position: relative;
  z-index: 2;
}

.cta-panel h2 {
  font-size: clamp(24px, 2.8vw, 36px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.cta-panel p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: var(--accent-primary);
  border-radius: var(--radius-btn);
  box-shadow: 0 0 12px var(--glow-blue);
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
  background: #1677FF;
  box-shadow: 0 0 20px rgba(46, 125, 255, 0.7);
  transform: translateY(-2px);
}

.btn-primary:focus-visible,
.btn-glass:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}

.btn-glass {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-btn);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 48px;
  padding-top: 56px;
  padding-bottom: 40px;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 340px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-links a:hover {
  color: var(--accent-primary);
  padding-left: 6px;
}

.footer-contact p {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 4px 0;
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 18px 0;
}

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

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cta-panel {
    padding: 40px 20px;
  }
}

/* ===== 回退 ===== */
@supports not (backdrop-filter: blur(1px)) {
  .step-card,
  .data-card,
  .checklist-card,
  .faq-item,
  .cta-panel,
  .site-header,
  .main-nav {
    background-color: rgba(15, 25, 45, 0.92);
  }
}

/* ===== 移动端手势 ===== */
@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .page-hero {
    padding: 120px 16px 48px;
    min-height: auto;
  }

  .page-hero h1 {
    font-size: 26px;
  }

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

  .section-head {
    margin-bottom: 32px;
  }

  .step-card {
    max-width: 100%;
  }

  .cta-panel {
    padding: 32px 20px;
  }

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

  .btn-primary,
  .btn-glass {
    justify-content: center;
  }

  .data-strip {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .data-card {
    padding: 16px;
  }

  .data-card .number {
    font-size: 28px;
  }
}

/* 无障碍样式 */
.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  z-index: 10000;
  padding: 8px 16px;
  background: var(--accent-primary);
  color: #fff;
  border-radius: 0 0 8px 8px;
  font-size: 14px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

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

/* 安全区 */
.no-scroll {
  overflow: hidden;
}

/* roulang page: category2 */
:root {
  --bg-primary: #081120;
  --bg-secondary: #101C2E;
  --bg-glass: rgba(15, 25, 45, 0.65);
  --border-glass: rgba(255, 255, 255, 0.10);
  --accent-primary: #2E7DFF;
  --accent-secondary: #00D4AA;
  --text-primary: #F0F5FC;
  --text-secondary: #8FA3BF;
  --text-muted: #5A6C85;
  --glow-blue: rgba(46, 125, 255, 0.5);
  --glow-cyan: rgba(0, 212, 170, 0.35);
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

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

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea {
  font-family: var(--font-family);
}

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

@supports not (backdrop-filter: blur(1px)) {
  .site-header,
  .nav-cta,
  .hero-stats .stat-item,
  .feature-card,
  .cta-panel,
  .faq-item {
    background: rgba(15, 25, 45, 0.92) !important;
  }
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background: rgba(8, 17, 32, 0.55);
  backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

.site-header.scrolled {
  background: rgba(8, 17, 32, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: rgba(0, 212, 170, 0.12);
  border: 1px solid rgba(0, 212, 170, 0.3);
  flex-shrink: 0;
}

.brand-text {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav .nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s ease;
}

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

.main-nav .nav-link:hover {
  color: var(--text-primary);
}

.main-nav .nav-link:hover::after {
  width: 100%;
}

.main-nav .nav-link.active {
  color: var(--text-primary);
}

.main-nav .nav-link.active::after {
  width: 100%;
  background: var(--accent-secondary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background: var(--accent-primary);
  color: #fff;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.25s ease;
  box-shadow: 0 0 10px rgba(46, 125, 255, 0.35);
  white-space: nowrap;
}

.nav-cta:hover {
  background: #1677FF;
  box-shadow: 0 0 18px rgba(46, 125, 255, 0.6);
  transform: translateY(-1px);
  color: #fff;
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  transition: background 0.2s ease;
}

.hamburger:hover {
  background: rgba(255, 255, 255, 0.1);
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

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

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

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

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  background: rgba(8, 17, 32, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0 30px;
  z-index: 998;
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu.hidden {
  display: none;
}

.mobile-menu a {
  display: block;
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: all 0.25s ease;
}

.mobile-menu a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.mobile-menu a.active {
  color: var(--text-primary);
  border-left-color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.06);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0A1628 0%, #0B1B33 50%, #081018 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -15%;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 125, 255, 0.35) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -15%;
  right: -10%;
  width: 50%;
  height: 50%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.45;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 17, 32, 0.35) 0%, rgba(8, 17, 32, 0.8) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 140px 0 100px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-tag);
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.3);
  color: var(--accent-secondary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(30px, 4.5vw, 58px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero h1 .line1 {
  color: var(--text-primary);
  display: block;
}

.hero h1 .line2 {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  background: var(--accent-primary);
  color: #fff;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.25s ease;
  box-shadow: 0 0 12px var(--glow-blue);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: #1677FF;
  box-shadow: 0 0 20px rgba(46, 125, 255, 0.7);
  transform: translateY(-2px);
  color: #fff;
}

.btn-primary:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
  border-radius: 10px;
  font-size: 16px;
  font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  transition: all 0.25s ease;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  max-width: 900px;
  margin: 56px auto 0;
}

.hero-stats .stat-item {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-stats .stat-item strong {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

/* ===== 分类页 Hero ===== */
.hero.category-hero {
  min-height: 45vh;
  padding-top: 72px;
}

.hero.category-hero .hero-content {
  padding: 60px 0 50px;
}

.hero.category-hero h1 {
  font-size: clamp(28px, 3.6vw, 44px);
}

.hero.category-hero .hero-sub {
  font-size: 16px;
  margin-bottom: 24px;
}

/* ===== 通用 Section ===== */
.section {
  padding: 96px 0;
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

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

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-header .section-tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  background: rgba(46, 125, 255, 0.12);
  border: 1px solid rgba(46, 125, 255, 0.25);
  color: var(--accent-primary);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(22px, 2.5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
}

/* ===== 平台概览 ===== */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.overview-image {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-card);
  position: relative;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #0E1B30, #152a4d);
}

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

.overview-image:hover img {
  transform: scale(1.03);
}

.overview-content h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.overview-content p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.overview-list {
  list-style: none;
  margin-top: 20px;
}

.overview-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  color: var(--text-primary);
  font-size: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.overview-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  flex-shrink: 0;
  margin-top: 8px;
}

/* ===== 核心功能 ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px 28px;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 212, 170, 0.3);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(46, 125, 255, 0.12);
  border: 1px solid rgba(46, 125, 255, 0.25);
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
  background: rgba(0, 212, 170, 0.12);
  border-color: rgba(0, 212, 170, 0.3);
  box-shadow: 0 0 16px rgba(0, 212, 170, 0.2);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent-primary);
  transition: stroke 0.3s ease;
}

.feature-card:hover .feature-icon svg {
  stroke: var(--accent-secondary);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}

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

/* ===== 数据指标 ===== */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.metric-item {
  text-align: center;
  padding: 36px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  transition: all 0.3s ease;
}

.metric-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-4px);
  border-color: rgba(0, 212, 170, 0.25);
}

.metric-number {
  font-size: 42px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  margin-bottom: 10px;
}

.metric-number span {
  color: var(--accent-secondary);
  font-size: 20px;
  font-weight: 600;
}

.metric-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== 适用场景 ===== */
.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.scenario-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all 0.3s ease;
}

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

.scenario-row:nth-child(even) .scenario-image {
  order: 2;
}

.scenario-image {
  height: 100%;
  min-height: 260px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, #0E1B30, #152a4d);
}

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

.scenario-row:hover .scenario-image img {
  transform: scale(1.03);
}

.scenario-content {
  padding: 32px;
}

.scenario-content .scenario-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.25);
  color: var(--accent-secondary);
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 14px;
}

.scenario-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.scenario-content p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.75;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.faq-item.open {
  border-color: rgba(0, 212, 170, 0.3);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 0 20px;
  height: 56px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  text-align: left;
  transition: color 0.3s ease;
  cursor: pointer;
}

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

.faq-icon {
  position: relative;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.faq-icon::before {
  width: 12px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.faq-icon::after {
  width: 2px;
  height: 12px;
  transform: translate(-50%, -50%);
}

.faq-item.open .faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.faq-item.open .faq-icon::before {
  background: var(--accent-secondary);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.3s ease;
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
}

.faq-answer-inner p {
  padding: 0 20px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 96px 0 80px;
  position: relative;
}

.cta-panel {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 40px;
  text-align: center;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.cta-panel::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(circle, rgba(46, 125, 255, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.cta-panel::after {
  content: '';
  position: absolute;
  bottom: -60%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(circle, rgba(0, 212, 170, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.cta-panel h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  position: relative;
  z-index: 1;
}

.cta-panel p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-panel .btn-primary {
  position: relative;
  z-index: 1;
  font-size: 18px;
  padding: 16px 40px;
  box-shadow: 0 0 12px var(--glow-blue), 0 0 30px rgba(46, 125, 255, 0.2);
}

.cta-panel .btn-primary:hover {
  box-shadow: 0 0 20px rgba(46, 125, 255, 0.7), 0 0 40px rgba(46, 125, 255, 0.3);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #060D18;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 60px;
}

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

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

.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.75;
  max-width: 300px;
  margin-top: 12px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  color: var(--text-muted);
  font-size: 14px;
  padding: 5px 0;
  transition: all 0.2s ease;
}

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

.footer-contact p {
  color: var(--text-muted);
  font-size: 14px;
  padding: 4px 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding: 20px 0;
}

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .scenario-row {
    grid-template-columns: 1fr;
  }

  .scenario-row:nth-child(even) .scenario-image {
    order: 0;
  }

  .scenario-image {
    min-height: 200px;
  }

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

  .overview-image {
    max-height: 400px;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .hero h1 {
    font-size: 40px;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .feature-card {
    padding: 24px 20px;
  }
}

@media (max-width: 768px) {
  .site-header .container {
    height: 60px;
  }

  .main-nav {
    display: none;
  }

  .nav-cta.desktop-only {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu {
    top: 60px;
  }

  .hero {
    min-height: auto;
    padding-top: 60px;
  }

  .hero-content {
    padding: 60px 0 50px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-sub {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    margin-top: 36px;
  }

  .hero-stats .stat-item {
    justify-content: flex-start;
  }

  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 36px;
  }

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

  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .metric-number {
    font-size: 30px;
  }

  .scenario-content {
    padding: 24px;
  }

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

  .cta-panel {
    padding: 40px 24px;
  }

  .hero.category-hero {
    min-height: auto;
    padding-top: 60px;
  }

  .hero.category-hero .hero-content {
    padding: 48px 0 40px;
  }
}

@media (max-width: 520px) {
  .container {
    width: 90vw;
  }

  .brand-text {
    font-size: 19px;
  }

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

  .hero-sub {
    font-size: 14px;
  }

  .btn-primary,
  .btn-ghost {
    width: 100%;
    max-width: 280px;
    padding: 12px 20px;
    font-size: 15px;
  }

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

  .metric-item {
    padding: 24px 16px;
  }

  .metric-number {
    font-size: 34px;
  }

  .feature-card {
    padding: 24px 20px;
  }

  .overview-content h3 {
    font-size: 20px;
  }

  .scenario-content h3 {
    font-size: 18px;
  }

  .faq-question {
    font-size: 14px;
    padding: 0 16px;
    height: 52px;
  }

  .faq-answer-inner p {
    font-size: 13px;
    padding: 12px 16px 16px;
  }

  .cta-panel {
    padding: 32px 20px;
  }

  .cta-panel h2 {
    font-size: 22px;
  }

  .footer-grid {
    gap: 24px;
  }
}

/* roulang page: article */
:root {
  --bg-primary: #081120;
  --bg-secondary: #101C2E;
  --bg-glass: rgba(15, 25, 45, 0.65);
  --border-glass: rgba(255, 255, 255, 0.10);
  --accent-primary: #2E7DFF;
  --accent-secondary: #00D4AA;
  --text-primary: #F0F5FC;
  --text-secondary: #8FA3BF;
  --text-muted: #5A6C85;
  --glow-blue: rgba(46, 125, 255, 0.5);
  --glow-cyan: rgba(0, 212, 170, 0.35);
  --card-radius: 14px;
  --btn-radius: 10px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.35);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --nav-height: 72px;
  --container: 1200px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.7;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.25s; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--btn-radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: 0 0 12px var(--glow-blue);
}
.btn-primary:hover {
  background: #1677FF;
  box-shadow: 0 0 20px rgba(46, 125, 255, 0.7);
  transform: translateY(-2px);
}
.btn-primary:active { transform: translateY(0); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
}
.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}
.btn-sm { padding: 10px 20px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 18px; }
@supports not (backdrop-filter: blur(1px)) {
  .btn-ghost { background: rgba(255, 255, 255, 0.12); }
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 999;
  background: rgba(8, 17, 32, 0.55);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.35s, box-shadow 0.35s;
}
@supports not (backdrop-filter: blur(1px)) {
  .site-header { background: rgba(8, 17, 32, 0.95); }
}
.site-header.scrolled {
  background: rgba(8, 17, 32, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
@supports not (backdrop-filter: blur(1px)) {
  .site-header.scrolled { background: rgba(8, 17, 32, 0.98); }
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-primary);
  white-space: nowrap;
}
.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(0, 212, 170, 0.12);
  border: 1px solid rgba(0, 212, 170, 0.3);
  flex-shrink: 0;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color 0.25s;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--text-primary); }
.nav-link.active::after { transform: scaleX(1); }
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: 8px;
  border: 1px solid var(--border-glass);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.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); }

.breadcrumb-bar {
  position: relative;
  margin-top: var(--nav-height);
  padding: 44px 0 26px;
  background:
    linear-gradient(135deg, rgba(46, 125, 255, 0.12), rgba(0, 212, 170, 0.06)),
    url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  border-bottom: 1px solid var(--border-glass);
}
.breadcrumb-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(8, 17, 32, 0.82), rgba(8, 17, 32, 0.94));
  z-index: 1;
}
.breadcrumb-bar .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}
.breadcrumb a { color: var(--text-secondary); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent-secondary); }
.breadcrumb .sep { color: var(--text-muted); }
.breadcrumb .current {
  color: var(--text-primary);
  font-weight: 500;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-section {
  position: relative;
  padding: 56px 0 72px;
}
.article-card {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
  padding: 44px;
}
@supports not (backdrop-filter: blur(1px)) {
  .article-card { background: rgba(15, 25, 45, 0.92); }
}
.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}
.article-header {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-glass);
}
.article-header h1 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.article-meta .meta-cat {
  display: inline-flex;
  align-items: center;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.12);
  border: 1px solid rgba(0, 212, 170, 0.22);
}

.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
  word-wrap: break-word;
}
.article-body > *:last-child { margin-bottom: 0; }
.article-body h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.5;
  margin: 1.6em 0 0.8em;
  padding-left: 12px;
  border-left: 3px solid var(--accent-primary);
}
.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  margin: 1.4em 0 0.6em;
}
.article-body h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 1.2em 0 0.5em;
}
.article-body p {
  margin: 0 0 1.2em;
}
.article-body a {
  color: var(--accent-secondary);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s;
}
.article-body a:hover { color: #fff; }
.article-body ul,
.article-body ol {
  margin: 0 0 1.2em;
  padding-left: 1.5em;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.4em; }
.article-body blockquote {
  margin: 1.5em 0;
  padding: 14px 20px;
  background: rgba(46, 125, 255, 0.08);
  border-left: 3px solid var(--accent-primary);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
  font-size: 15px;
}
.article-body img {
  border-radius: 10px;
  margin: 1.5em auto;
  max-width: 100%;
  height: auto;
}
.article-body pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.6;
}
.article-body code {
  font-family: "SF Mono", "Consolas", "Liberation Mono", monospace;
  font-size: 0.9em;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}
.article-body pre code {
  background: none;
  padding: 0;
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--border-glass);
  margin: 2em 0;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 14px;
}
.article-body th,
.article-body td {
  padding: 10px 14px;
  border: 1px solid var(--border-glass);
  text-align: left;
}
.article-body th {
  background: rgba(46, 125, 255, 0.1);
  font-weight: 600;
}

.article-empty {
  max-width: 560px;
  margin: 0 auto;
  padding: 64px 40px;
  text-align: center;
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow-card);
}
@supports not (backdrop-filter: blur(1px)) {
  .article-empty { background: rgba(15, 25, 45, 0.92); }
}
.article-empty .empty-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(90, 108, 133, 0.15);
  margin-bottom: 20px;
}
.article-empty h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}
.article-empty p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.article-footer {
  max-width: 860px;
  margin: 32px auto 0;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-glass);
}

.related-section {
  max-width: var(--container);
  margin: 64px auto 0;
}
.related-section .section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.related-section h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}
.related-section .section-sub {
  font-size: 14px;
  color: var(--text-muted);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
}
@supports not (backdrop-filter: blur(1px)) {
  .related-card { background: rgba(15, 25, 45, 0.92); }
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 212, 170, 0.35);
}
.related-card .cover {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, var(--bg-secondary), #1A2A44);
}
.related-card .cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.related-card:hover .cover img { transform: scale(1.04); }
.related-card .related-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
}
.related-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}
.related-link {
  margin-top: auto;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s;
}
.related-card:hover .related-link { gap: 8px; }

.cta-section {
  position: relative;
  padding: 72px 0 96px;
}
.cta-card {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: 56px 40px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(46, 125, 255, 0.18), rgba(0, 212, 170, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 40px rgba(46, 125, 255, 0.15), var(--shadow-card);
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 30px;
  right: 30px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
}
.cta-card::after {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(46, 125, 255, 0.12);
  filter: blur(80px);
  top: -80px;
  right: -60px;
  pointer-events: none;
}
.cta-card h2 {
  position: relative;
  z-index: 1;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.cta-card p {
  position: relative;
  z-index: 1;
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.cta-card .btn {
  position: relative;
  z-index: 1;
}

.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 12px; }
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 320px;
  line-height: 1.7;
}
.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 5px 0;
  transition: color 0.25s, padding-left 0.25s;
}
.footer-links a:hover {
  color: var(--accent-secondary);
  padding-left: 6px;
}
.footer-contact p {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 3px 0;
}
.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 1023px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-card {
    padding: 36px 28px;
  }
}

@media (max-width: 767px) {
  :root { --nav-height: 60px; }
  .container { padding: 0 16px; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .main-nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 4px;
    padding: 24px 16px;
    background: rgba(8, 17, 32, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transform: translateX(100%);
    transition: transform 0.35s ease;
    overflow-y: auto;
    z-index: 998;
  }
  @supports not (backdrop-filter: blur(1px)) {
    .main-nav { background: rgba(8, 17, 32, 0.99); }
  }
  .main-nav.open { transform: translateX(0); }
  .nav-link {
    padding: 14px 16px;
    font-size: 16px;
    border-radius: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .nav-link::after { display: none; }
  .nav-link:hover { background: rgba(46, 125, 255, 0.1); }
  .nav-link.active { background: rgba(46, 125, 255, 0.15); }

  .breadcrumb-bar {
    padding: 32px 0 18px;
  }
  .breadcrumb .current {
    max-width: 200px;
  }
  .article-section {
    padding: 36px 0 48px;
  }
  .article-card {
    padding: 24px 20px;
    border-radius: 12px;
  }
  .article-header h1 {
    font-size: 22px;
  }
  .article-body {
    font-size: 15px;
  }
  .article-body h2 {
    font-size: 19px;
  }
  .related-section {
    margin-top: 48px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .related-section .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .article-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .cta-section {
    padding: 48px 0 64px;
  }
  .cta-card {
    padding: 40px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
}

/* roulang page: category3 */
:root {
  --bg-primary: #081120;
  --bg-secondary: #101C2E;
  --bg-glass: rgba(15, 25, 45, 0.65);
  --bg-glass-solid: rgba(15, 25, 45, 0.92);
  --border-glass: rgba(255, 255, 255, 0.10);
  --accent-primary: #2E7DFF;
  --accent-primary-hover: #1677FF;
  --accent-secondary: #00D4AA;
  --text-primary: #F0F5FC;
  --text-secondary: #8FA3BF;
  --text-muted: #5A6C85;
  --glow-blue: rgba(46, 125, 255, 0.5);
  --glow-cyan: rgba(0, 212, 170, 0.35);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-tag: 999px;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 12px var(--glow-blue);
  --shadow-glow-hover: 0 0 20px rgba(46, 125, 255, 0.7);
  --container: 1200px;
  --section-space: 96px;
  --header-height: 72px;
  --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
  font-family: var(--font-base);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  font-variant-numeric: tabular-nums;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

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

ul,
ol {
  list-style: none;
}

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

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.10);
  border: 1px solid rgba(0, 212, 170, 0.22);
  padding: 6px 14px;
  border-radius: var(--radius-tag);
  margin-bottom: 16px;
}

.section-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  box-shadow: 0 0 8px var(--glow-cyan);
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

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

.section-head h2 {
  font-size: clamp(22px, 2.5vw, 34px);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.section-head p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

/* Glass Card */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease);
}

.glass-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.18), transparent 60%);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0, 212, 170, 0.30);
}

@supports not (backdrop-filter: blur(1px)) {
  .glass-card {
    background: var(--bg-glass-solid);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  transition: all 0.25s var(--ease);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-secondary);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--accent-primary);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  box-shadow: var(--shadow-glow-hover);
  transform: translateY(-2px);
}

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

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-primary);
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.10);
  transform: translateY(-2px);
}

.btn-lg {
  font-size: 18px;
  padding: 16px 40px;
  border-radius: 12px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  height: var(--header-height);
  background: rgba(8, 17, 32, 0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(8, 17, 32, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.brand-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-glass);
  border: 1px solid rgba(0, 212, 170, 0.35);
  border-radius: 9px;
  box-shadow: 0 0 14px rgba(0, 212, 170, 0.15);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 2px;
  transition: color 0.25s ease;
  letter-spacing: 0.01em;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

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

.nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

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

.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s ease;
}

.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);
}

/* Category Hero */
.category-hero {
  position: relative;
  min-height: 48vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 48px);
  padding-bottom: 64px;
  overflow: hidden;
  background: linear-gradient(135deg, #050d1f 0%, #0a1830 55%, #0b1f3a 100%);
}

.hero-glow {
  position: absolute;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  opacity: 0.5;
}

.hero-glow.glow-left {
  top: -160px;
  left: -120px;
  background: rgba(46, 125, 255, 0.35);
}

.hero-glow.glow-right {
  bottom: -220px;
  right: -100px;
  background: rgba(0, 212, 170, 0.22);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.hero-image {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 17, 32, 0.55) 0%, rgba(8, 17, 32, 0.65) 100%);
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-tag);
  margin-bottom: 20px;
}

.hero-content h1 {
  font-size: clamp(30px, 4.5vw, 52px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.grad-text {
  display: block;
  background: linear-gradient(120deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  padding-bottom: 4px;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 48px;
}

.hero-chips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 620px;
}

.chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-glass);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 13px;
}

.chip strong {
  font-family: var(--font-num);
  font-size: 18px;
  color: var(--accent-secondary);
  font-weight: 700;
}

@supports not (backdrop-filter: blur(1px)) {
  .chip {
    background: var(--bg-glass-solid);
  }
}

/* Quick Overview */
.quick-section {
  background: var(--bg-secondary);
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.quick-card {
  padding: 32px 28px;
}

.quick-card .quick-icon {
  font-family: var(--font-num);
  font-size: 42px;
  font-weight: 700;
  color: rgba(46, 125, 255, 0.5);
  line-height: 1;
  margin-bottom: 20px;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}

.quick-card:hover .quick-icon {
  color: var(--accent-secondary);
  text-shadow: 0 0 24px var(--glow-cyan);
}

.quick-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.quick-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item.open {
  border-color: rgba(0, 212, 170, 0.35);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 24px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  transition: color 0.2s ease;
}

.faq-item.open .faq-question {
  color: var(--accent-secondary);
}

.faq-icon {
  position: relative;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.35s var(--ease), border-color 0.3s ease, background 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: background 0.3s ease, transform 0.35s var(--ease);
}

.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.open .faq-icon {
  border-color: rgba(0, 212, 170, 0.5);
  background: rgba(0, 212, 170, 0.1);
  transform: rotate(45deg);
}

.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after {
  background: var(--accent-secondary);
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s var(--ease);
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-answer-inner {
  overflow: hidden;
}

.faq-answer-inner p {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 92%;
}

/* Feature Blocks */
.feature-section {
  background: var(--bg-secondary);
  overflow: hidden;
}

.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 48px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.feature-block.reverse .feature-media {
  order: 2;
}

.feature-media {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, #0d1b30, #132a4a);
  position: relative;
  box-shadow: var(--shadow-card);
}

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

.feature-block:hover .feature-media img {
  transform: scale(1.04);
}

.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  border: 1px solid var(--border-glass);
  pointer-events: none;
}

.feature-content {
  padding: 16px 0;
}

.feature-num {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-secondary);
  background: rgba(0, 212, 170, 0.1);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: var(--radius-tag);
  padding: 4px 12px;
  display: inline-block;
  margin-bottom: 16px;
}

.feature-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
  line-height: 1.4;
}

.feature-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.feature-list li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  background: rgba(46, 125, 255, 0.1);
  border: 1px solid rgba(46, 125, 255, 0.16);
  padding: 6px 12px;
  border-radius: var(--radius-tag);
}

.feature-list li::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-secondary);
}

/* CTA */
.cta-section {
  background: var(--bg-primary);
  padding-bottom: 100px;
}

.cta-panel {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
  padding: 64px 48px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(46, 125, 255, 0.14), rgba(0, 212, 170, 0.08)), var(--bg-glass);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.06) inset,
    0 24px 60px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}

.cta-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
}

.cta-panel h2 {
  font-size: clamp(24px, 2.8vw, 36px);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.cta-panel p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

@supports not (backdrop-filter: blur(1px)) {
  .cta-panel {
    background: var(--bg-glass-solid);
  }
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  background: var(--bg-secondary);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

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

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 360px;
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links h4,
.footer-contact h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease, transform 0.2s ease;
  width: fit-content;
}

.footer-links a:hover {
  color: var(--accent-secondary);
  transform: translateX(4px);
}

.footer-contact p {
  font-size: 14px;
  color: var(--text-secondary);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 20px 0;
}

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

@media (max-width: 1024px) {
  :root {
    --section-space: 80px;
  }

  .header-inner {
    gap: 20px;
  }

  .main-nav {
    gap: 20px;
  }

  .feature-block {
    gap: 32px;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 60px;
    --section-space: 64px;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .nav-cta {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(8, 17, 32, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 20px;
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s var(--ease);
    z-index: 998;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

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

  .main-nav .nav-cta {
    display: inline-flex;
    margin-top: 16px;
  }

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

  .hero-chips {
    grid-template-columns: 1fr;
    max-width: 100%;
  }

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

  .quick-card {
    padding: 24px;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 36px 0;
  }

  .feature-block.reverse .feature-media {
    order: 0;
  }

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

  .cta-panel {
    padding: 44px 24px;
  }

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

  .footer-brand p {
    max-width: 100%;
  }
}

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

  .category-hero {
    min-height: auto;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .btn-lg {
    width: 100%;
  }

  .feature-list li {
    font-size: 12px;
  }
}