/* roulang page: index */
:root {
  --brand-600: #2563eb;
  --brand-700: #1d4ed8;
  --accent-500: #14b8a6;
  --bg-body: #f8fafc;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-light: #e2e8f0;
  --radius-card: 1rem;
  --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 12px 32px rgba(37, 99, 235, 0.12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; transition: color .2s ease; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font-family: inherit; }
.container-x { max-width: 1280px; margin: 0 auto; padding-left: 1.5rem; padding-right: 1.5rem; }
.nav-link {
  position: relative;
  font-weight: 500;
  color: #334155;
  padding: 0.5rem 0.25rem;
  transition: color .2s ease;
}
.nav-link:hover { color: var(--brand-600); }
.nav-link.active { color: var(--brand-600); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-600);
}
.mega-panel {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  width: 680px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: 1rem;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.12);
  opacity: 0;
  visibility: hidden;
  transition: all .25s ease;
  z-index: 50;
  padding: 1.5rem;
}
.nav-item:hover .mega-panel,
.nav-item:focus-within .mega-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  background: var(--brand-600);
  color: #fff;
  padding: 0.75rem 1.6rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
  transition: all .25s ease;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { background: var(--brand-700); box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  background: transparent;
  color: var(--brand-600);
  border: 1.5px solid var(--brand-600);
  padding: 0.65rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all .25s ease;
  cursor: pointer;
}
.btn-outline:hover { background: #eff6ff; border-color: var(--brand-700); color: var(--brand-700); }
.btn-outline:active { transform: scale(0.98); }
.card-base {
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: box-shadow .3s ease, transform .3s ease;
}
.card-base:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.cover-img { width: 100%; height: 100%; object-fit: cover; }
.badge-pill {
  display: inline-block;
  padding: 0.28rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #dbeafe;
}
.section-title { font-size: 2rem; font-weight: 700; line-height: 1.3; color: #0f172a; }
.section-sub { font-size: 1.05rem; color: var(--text-muted); max-width: 720px; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid #dbeafe;
  color: #1d4ed8;
  padding: 0.32rem 1rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 600;
}
.card li { position: relative; padding-left: 1.2rem; }
.card li::before { content: ''; position: absolute; left: 0; top: .55em; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-600); }
.step-line { position: relative; }
.step-line::before {
  content: '';
  position: absolute;
  top: 2.5rem;
  left: 1.5rem;
  width: 1px;
  height: calc(100% - 2rem);
  background: #dbeafe;
}
@media (min-width: 768px) {
  .step-line::before {
    top: 1.8rem;
    left: 0;
    right: 0;
    width: auto;
    height: 1px;
    background: #dbeafe;
  }
}
details.faq-item {
  border: 1px solid var(--border-light);
  border-radius: 0.85rem;
  background: #fff;
  padding: 1rem 1.25rem;
  margin-bottom: 0.85rem;
  transition: box-shadow .25s ease;
}
details.faq-item:hover { box-shadow: var(--shadow-card); }
details.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: #1e293b;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 1.02rem;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #eff6ff;
  color: var(--brand-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform .3s ease, background .3s ease;
}
details[open].faq-item .faq-icon {
  transform: rotate(45deg);
  background: var(--brand-600);
  color: #fff;
}
.form-control {
  width: 100%;
  border: 1.5px solid var(--border-light);
  border-radius: 0.75rem;
  padding: 0.75rem 1rem;
  background: #fff;
  color: var(--text-main);
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-control:focus {
  outline: none;
  border-color: var(--brand-600);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.form-label { display: block; font-size: 0.9rem; font-weight: 600; color: #334155; margin-bottom: 0.4rem; }
.news-list li {
  border-bottom: 1px solid #f1f5f9;
  padding: 1rem 0.25rem;
  transition: background .2s ease;
}
.news-list li:hover { background: #f8fafc; }
.news-list a.title {
  display: block;
  font-weight: 600;
  color: #1e293b;
  font-size: 1rem;
  line-height: 1.5;
  transition: color .2s ease;
}
.news-list a.title:hover { color: var(--brand-600); }
.news-list .meta { font-size: 0.82rem; color: #94a3b8; margin-top: 0.25rem; }
.hero-stats {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 1.2rem;
  box-shadow: 0 16px 40px rgba(37,99,235,0.08);
}
.footer-link { color: #cbd5e1; transition: color .2s ease; display: inline-block; margin: 0.25rem 0; }
.footer-link:hover { color: #60a5fa; }
.footer-title { color: #fff; font-weight: 700; font-size: 1.05rem; margin-bottom: 0.8rem; }
@media (max-width: 640px) {
  .section-title { font-size: 1.6rem; }
  .hero-stats { margin-top: 1.5rem; }
}
input:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 2px;
}

/* roulang page: category1 */
:root {
    --brand: #1e63e0;
    --brand-dark: #174db8;
    --brand-light: #e0effe;
    --accent: #0ea5a4;
    --bg: #f7fafd;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --radius: 16px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 8px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.1);
    --container: 1200px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button {
    cursor: pointer;
    font-family: inherit;
  }

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

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

  .section-padding {
    padding: 96px 0;
  }

  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--brand);
    background: var(--brand-light);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
  }

  .section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: #0f172a;
    margin-bottom: 16px;
  }

  .section-subtitle {
    font-size: 1.05rem;
    color: var(--muted);
    max-width: 720px;
    line-height: 1.7;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--brand);
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    padding: 14px 28px;
    border-radius: 12px;
    border: none;
    box-shadow: 0 4px 14px rgba(30, 99, 224, 0.3);
    transition: all 0.25s ease;
  }

  .btn-primary:hover {
    background: var(--brand-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(30, 99, 224, 0.35);
  }

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

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: var(--brand);
    font-weight: 600;
    font-size: 15px;
    padding: 13px 26px;
    border-radius: 12px;
    border: 1.5px solid var(--brand);
    transition: all 0.25s ease;
  }

  .btn-outline:hover {
    background: var(--brand-light);
    transform: translateY(-2px);
  }

  .btn-white {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #fff;
    color: var(--brand);
    font-weight: 700;
    font-size: 15px;
    padding: 14px 28px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: all 0.25s ease;
  }

  .btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
  }

  /* ===== Header 导航 ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
  }

  .logo-text {
    font-size: 1.15rem;
    font-weight: 800;
    line-height: 1.3;
    color: var(--brand);
    letter-spacing: -0.01em;
  }

  .logo-text span {
    color: #0f172a;
  }

  .nav-link {
    font-size: 15px;
    font-weight: 500;
    color: #334155;
    padding: 8px 4px;
    border-radius: 8px;
    transition: color 0.2s, background 0.2s;
    white-space: nowrap;
  }

  .nav-link:hover,
  .nav-link.active {
    color: var(--brand);
    background: var(--brand-light);
  }

  .nav-item {
    position: relative;
  }

  .mega-panel {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    width: 640px;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    z-index: 50;
  }

  .nav-item:hover .mega-panel,
  .nav-item:focus-within .mega-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(6px);
  }

  .mega-panel::before {
    content: "";
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid #fff;
  }

  .mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: #0f172a;
    font-size: 24px;
    padding: 8px;
    border-radius: 8px;
  }

  .mobile-menu {
    display: none;
    background: #fff;
    border-top: 1px solid var(--border);
    padding: 16px 24px 24px;
    box-shadow: var(--shadow-md);
  }

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

  .mobile-menu .mobile-nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 15px;
    font-weight: 600;
    color: #334155;
    border-radius: 10px;
    margin-bottom: 6px;
  }

  .mobile-menu .mobile-nav-link:hover,
  .mobile-menu .mobile-nav-link.active {
    background: var(--brand-light);
    color: var(--brand);
  }

  /* ===== Hero ===== */
  .hero-section {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 55%, #e8f4f8 100%);
    overflow: hidden;
  }

  .hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.08;
  }

  .hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr 1fr;
    gap: 40px;
    align-items: center;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(30, 99, 224, 0.1);
    color: var(--brand);
    font-size: 13px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
  }

  .hero-title {
    font-size: clamp(2rem, 3.5vw, 2.9rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: #0f172a;
    margin-bottom: 16px;
  }

  .hero-title .highlight {
    color: var(--brand);
  }

  .hero-desc {
    font-size: 1.05rem;
    color: #475569;
    line-height: 1.75;
    margin-bottom: 24px;
    max-width: 480px;
  }

  .hero-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
  }

  .hero-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 15px;
    color: #334155;
  }

  .hero-list li i {
    color: var(--brand);
    margin-top: 4px;
  }

  .hero-cover {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transform: rotate(1deg);
    transition: transform 0.4s ease;
  }

  .hero-cover:hover {
    transform: rotate(0deg) scale(1.01);
  }

  .hero-cover img {
    width: 100%;
    height: 420px;
    object-fit: cover;
  }

  .hero-cover .cover-tag {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(15, 23, 42, 0.78);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 999px;
    backdrop-filter: blur(6px);
  }

  .download-card {
    background: #fff;
    border-radius: 20px;
    padding: 28px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(226, 232, 240, 0.6);
  }

  .download-card .form-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 4px;
  }

  .download-card .form-desc {
    font-size: 13px;
    color: var(--muted);
    margin-bottom: 20px;
  }

  .form-group {
    margin-bottom: 14px;
  }

  .form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: #334155;
    margin-bottom: 5px;
  }

  .form-control {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text);
    background: #f8fafc;
    transition: all 0.2s ease;
    outline: none;
  }

  .form-control:focus {
    border-color: var(--brand);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(30, 99, 224, 0.12);
  }

  select.form-control {
    appearance: auto;
  }

  .form-tip {
    font-size: 12px;
    color: var(--muted);
    margin-top: 10px;
    text-align: center;
  }

  /* ===== 卡片 ===== */
  .card-base {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(226, 232, 240, 0.7);
    padding: 28px;
    transition: all 0.3s ease;
  }

  .card-base:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(30, 99, 224, 0.2);
  }

  .card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--brand-light);
    color: var(--brand);
    font-size: 20px;
    margin-bottom: 18px;
  }

  .card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 8px;
  }

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

  /* ===== 数据区块 ===== */
  .stats-section {
    background: linear-gradient(120deg, #0f172a 0%, #1e293b 100%);
    padding: 72px 0;
    position: relative;
    overflow: hidden;
  }

  .stats-section::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(30, 99, 224, 0.25);
    filter: blur(60px);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
    position: relative;
    z-index: 2;
  }

  .stat-number {
    font-size: 2.6rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
  }

  .stat-number span {
    color: #7cc5ff;
  }

  .stat-label {
    font-size: 14px;
    color: #94a3b8;
    font-weight: 500;
    margin-top: 6px;
  }

  /* ===== 场景卡片 ===== */
  .scene-card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    min-height: 280px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    display: flex;
    align-items: flex-end;
  }

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

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

  .scene-card::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, 0) 30%, rgba(15, 23, 42, 0.82) 100%);
  }

  .scene-info {
    position: relative;
    z-index: 2;
    padding: 24px;
    color: #fff;
  }

  .scene-info .scene-tag {
    font-size: 13px;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(4px);
    padding: 4px 10px;
    border-radius: 999px;
    display: inline-block;
    margin-bottom: 10px;
  }

  .scene-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 6px;
  }

  .scene-info p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
  }

  /* ===== 时间线 ===== */
  .timeline {
    position: relative;
    padding-left: 36px;
    margin-top: 8px;
  }

  .timeline::before {
    content: "";
    position: absolute;
    left: 12px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--brand-light), var(--brand));
    border-radius: 2px;
  }

  .timeline-item {
    position: relative;
    padding-bottom: 32px;
  }

  .timeline-item:last-child {
    padding-bottom: 0;
  }

  .timeline-item::before {
    content: "";
    position: absolute;
    left: -30px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--brand);
    box-shadow: 0 0 0 4px rgba(30, 99, 224, 0.15);
  }

  .timeline-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 4px;
  }

  .timeline-item p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
  }

  .timeline-step {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    color: var(--brand);
    background: var(--brand-light);
    padding: 2px 10px;
    border-radius: 999px;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }

  /* ===== FAQ ===== */
  .faq-item {
    background: #fff;
    border-radius: 14px;
    border: 1px solid var(--border);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.25s ease;
  }

  .faq-item:hover {
    border-color: rgba(30, 99, 224, 0.3);
    box-shadow: var(--shadow-sm);
  }

  .faq-item.open {
    border-color: rgba(30, 99, 224, 0.4);
    box-shadow: var(--shadow-md);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: #0f172a;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    transition: color 0.2s;
  }

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

  .faq-question .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--brand-light);
    color: var(--brand);
    font-size: 13px;
    transition: transform 0.3s ease;
  }

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

  .faq-answer {
    max-height: 0;
    padding: 0 24px;
    overflow: hidden;
    transition: all 0.3s ease;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.75;
  }

  .faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
  }

  /* ===== CTA ===== */
  .cta-section {
    position: relative;
    padding: 80px 0;
    background-image: url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    border-radius: 32px;
    overflow: hidden;
    margin: 96px auto;
  }

  .cta-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(13, 34, 67, 0.92), rgba(20, 50, 90, 0.82));
  }

  .cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px 20px;
  }

  .cta-content h2 {
    color: #fff;
    font-size: clamp(1.75rem, 3vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 14px;
  }

  .cta-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
  }

  /* ===== Footer ===== */
  .footer-link {
    color: #94a3b8;
    line-height: 2.2;
    transition: color 0.2s;
  }

  .footer-link:hover {
    color: #fff;
  }

  .footer-title {
    font-size: 14px;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 12px;
    letter-spacing: 0.02em;
  }

  /* ===== 响应式 ===== */
  @media (max-width: 1024px) {
    .hero-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .download-card {
      grid-column: 1 / -1;
    }

    .hero-cover img {
      height: 300px;
    }

    .mega-panel {
      display: none;
    }

    .nav-cta-btn {
      display: none !important;
    }
  }

  @media (max-width: 768px) {
    .section-padding {
      padding: 72px 0;
    }

    .header-inner {
      height: 64px;
    }

    .desktop-nav {
      display: none !important;
    }

    .mobile-menu-btn {
      display: inline-flex;
    }

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

    .hero-cover img {
      height: 240px;
    }

    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .stat-number {
      font-size: 2rem;
    }

    .cta-section {
      margin: 64px 16px;
      border-radius: 24px;
    }

    .logo-text {
      font-size: 0.95rem;
    }
  }

  @media (max-width: 520px) {
    .hero-section {
      padding: 56px 0;
    }

    .hero-title {
      font-size: 1.7rem;
    }

    .hero-list li {
      font-size: 14px;
    }

    .download-card {
      padding: 20px;
    }

    .btn-primary,
    .btn-outline,
    .btn-white {
      width: 100%;
    }

    .form-actions {
      gap: 10px;
    }

    .timeline {
      padding-left: 28px;
    }
  }

  /* 焦点可见性 */
  a:focus-visible,
  button:focus-visible,
  input:focus-visible,
  select:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
  }