/* ==============================
   昆仑AI安全团队 tk.html · ByteDance Style
   ============================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand Colors */
  --primary:       #2563eb;
  --primary-light: #3b82f6;
  --primary-dark:  #1d4ed8;
  --primary-bg:    rgba(37, 99, 235, 0.08);

  /* Accent */
  --accent-cyan:   #06b6d4;
  --accent-purple: #8b5cf6;
  --accent-amber:  #f59e0b;

  /* Surface Colors */
  --bg-deepest:    #f0f2f5;
  --bg-page:       #f0f2f5;
  --bg-section:    #e8ebf0;
  --bg-card:       #ffffff;
  --bg-elevated:   #f5f6f8;

  /* Borders */
  --border:         rgba(0, 0, 0, 0.10);
  --border-light:   rgba(0, 0, 0, 0.05);

  /* Text */
  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-muted:     #64748b;

  /* Shadows */
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 28px rgba(0,0,0,0.12);
  --shadow-xl:  0 16px 48px rgba(0,0,0,0.15);

  /* Glass (light theme) */
  --glass-bg:       rgba(255, 255, 255, 0.6);
  --glass-border:   rgba(0, 0, 0, 0.06);
  --glass-hover-bg: rgba(255, 255, 255, 0.92);
  --glass-hover-bd: rgba(37, 99, 235, 0.18);

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont,
               'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-display: 64px;
  --text-hero: 48px;
  --text-h1: 38px;
  --text-h2: 28px;
  --text-h3: 20px;
  --text-h4: 17px;
  --text-body: 15px;
  --text-small: 13px;
  --text-nano: 12px;

  /* Spacing */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px;
  --space-4: 16px; --space-5: 20px; --space-6: 24px;
  --space-8: 32px; --space-10: 40px;--space-12: 48px;
  --space-16: 64px;--space-20: 80px;--space-24: 96px;

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 999px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: all 0.35s var(--ease);
  --transition-fast: all 0.2s var(--ease);

  /* Z-index */
  --z-nav: 1000;
  --z-overlay: 2000;
  --z-modal: 3000;

  /* Blur */
  --blur-nav: blur(20px);
  --blur-glass: blur(16px);
  --blur-overlay: blur(8px);

  /* Container */
  --container: 1200px;
  --container-pad: 24px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: var(--text-body);
}

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

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

ul, ol { list-style: none; }

::selection {
  background: rgba(37, 99, 235, 0.30);
  color: #fff;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deepest); }
::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

/* ---------- Navigation ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
  transition: var(--transition);
}

.nav {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.3px;
  flex-shrink: 0;
  white-space: nowrap;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent-purple));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.logo-img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
}

.logo-text {
  white-space: nowrap;
}

.menu {
  display: flex;
  gap: var(--space-8);
  font-size: 14px;
  font-weight: 500;
}

.menu a {
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
  transition: var(--transition-fast);
}

.menu a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: var(--transition);
}

.menu a:hover,
.menu a.active {
  color: var(--primary);
}

.menu a:hover::after,
.menu a.active::after {
  width: 100%;
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
}

/* ---------- 移动端导航 ---------- */
.mobile-toggle {
  display: none;
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  padding: 0;
  margin-left: 8px;
  cursor: pointer;
  flex-shrink: 0;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  border-radius: 999px;
  background: var(--text-primary);
  margin: 6px 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* 默认不显示移动菜单 */
.mobile-menu {
  display: none;
}

@media (max-width: 768px) {
  .header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
  }

  body {
    padding-top: 56px; /* 给固定导航腾空间 */
  }

  .nav {
    height: 56px;
  }

  /* 小屏隐藏桌面菜单和右侧按钮，只留 logo + 汉堡 */
  .menu {
    display: none;
  }

  .nav-btn {
    display: none;
  }

  .mobile-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(12px) saturate(160%);
    -webkit-backdrop-filter: blur(12px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.45);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  }

  /* 半屏覆盖菜单区域 */
  .mobile-menu {
    position: fixed;
    inset: 56px 0 0 0; /* 顶部留出导航高度 */
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.30);
    box-shadow: 0 12px 32px rgba(0,0,0,0.08);
    display: block;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 900;
  }

  .mobile-menu.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .mobile-menu-inner {
    display: flex;
    flex-direction: column;
    padding: 20px 20px 32px;
    gap: 8px;
  }

  .mobile-menu-inner a {
    display: block;
    padding: 10px 4px;
    font-size: 15px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 8px;
  }

  .mobile-menu-inner a:hover {
    background: var(--primary-bg);
    color: var(--primary);
  }

  .mobile-menu-cta {
    margin-top: 8px;
    background: var(--primary);
    text-align: center;
    color: #fff !important;
    font-weight: 600;
  }

  /* 汉堡变 X */
  .mobile-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .section,
  .section-alt {
    padding: 52px 0;
  }

  .section-title h2 {
    font-size: 22px;
  }

  .section-title p {
    font-size: 14px;
  }

  .container {
    padding: 0 16px;
  }

  body {
    font-size: 14px;
  }

  .pricing-grid,
  .mission-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }


  .hero {
    padding: 72px 0 40px;
  }

  .hero h1 {
    font-size: 24px;
    line-height: 1.25;
  }

  .hero-content p {
    font-size: 14px;
  }

  .hero-actions {
    gap: 8px;
  }

  .hero-actions .btn {
    padding: 10px 18px;
    font-size: 13px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .price-card {
    padding: 18px 16px 16px;
  }

  .price-card-head {
    flex-direction: row;
    align-items: baseline;
  }

  .price-num {
    font-size: 18px;
  }

  .price-num-main {
    font-size: 20px;
  }

  .price-card-hot {
    transform: none;
  }

  .footer {
    padding: 32px 0 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 6px;
    text-align: center;
    font-size: 12px;
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.8);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-glass:hover {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--primary-bg);
  border-color: var(--primary);
  color: var(--primary);
}

.btn-white {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.2);
}

.btn-white:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

.btn-sm { padding: 10px 20px; font-size: 13px; }
.btn-lg { padding: 16px 36px; font-size: 17px; }

/* ---------- Section Common ---------- */
.section {
  padding: 80px 0;
}

.section + .section {
  border-top: 1px solid var(--border-light);
}

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

.section-alt::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(37, 99, 235, 0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

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

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title .tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--primary-bg);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.section-title h2 {
  font-size: var(--text-h1);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  position: relative;
  display: block;
  word-wrap: break-word;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent-cyan));
}

.section-title p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
  line-height: 1.8;
}

@media (max-width: 768px) {
  .section { padding: var(--space-16) 0; }
  .section-title h2 { font-size: 26px; }
  .section-title { margin-bottom: 40px; }
  .section-title p { font-size: 15px; }
}

/* ---------- Grid Layouts ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 992px) {
  .grid-2 { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
}

/* ---------- Card ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  transition: all 0.3s ease;
  position: relative;
  display: flex;
  flex-direction: column;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  border-color: rgba(37, 99, 235, 0.20);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04),
              0 0 0 1px rgba(37, 99, 235, 0.06);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--primary-bg), rgba(37, 99, 235, 0.15));
  border: 1px solid rgba(37, 99, 235, 0.08);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.06);
  transition: all 0.3s ease;
}

.card:hover .card-icon {
  background: linear-gradient(135deg, var(--primary-bg), rgba(37, 99, 235, 0.20));
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.10);
  transform: scale(1.05);
}

.card-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-light);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

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

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 8px 0;
  display: grid;
  gap: 6px;
}
.features-list li {
  position: relative;
  padding-left: 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}
.features-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  font-weight: 700;
  color: var(--primary);
}

/* ---------- Glass Card Variant ---------- */
.card-glass {
  background: var(--glass-bg);
  backdrop-filter: var(--blur-glass);
  -webkit-backdrop-filter: var(--blur-glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.card-glass:hover {
  background: var(--glass-hover-bg);
  border-color: var(--glass-hover-bd);
  transform: translateY(-6px);
}

/* ---------- Badge / Tag ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-size: var(--text-nano);
  font-weight: 600;
  background: var(--primary-bg);
  color: var(--primary);
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.badge-hot {
  background: rgba(239, 68, 68, 0.10);
  color: #dc2626;
  border-color: rgba(239, 68, 68, 0.18);
}

.badge-new {
  background: rgba(5, 150, 105, 0.10);
  color: #059669;
  border-color: rgba(5, 150, 105, 0.18);
}

.badge-ai {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.10), rgba(139, 92, 246, 0.10));
  color: #7c3aed;
  border-color: rgba(139, 92, 246, 0.18);
}

/* ---------- Hero Section ---------- */
.hero {
  min-height: 100vh;
  min-height: 540px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #e8ebf0 0%, #dbeafe 40%, var(--bg-page) 100%);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    radial-gradient(circle at 25% 50%, rgba(37, 99, 235, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 75% 50%, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.15), transparent);
}

.hero-glow-1 {
  position: absolute;
  top: -30%;
  right: -15%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-glow-2 {
  display: none;
}

/* ---------- Hero Decorative Floating Elements ---------- */
.deco-float {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}
.deco-float-1 {
  top: 12%;
  left: 5%;
  width: 120px; height: 120px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.12) 0%, transparent 70%);
  animation: floatSlow 7s ease-in-out infinite;
}
.deco-float-2 {
  bottom: 18%;
  right: 8%;
  width: 180px; height: 180px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.10) 0%, transparent 70%);
  animation: floatMid 9s ease-in-out infinite;
}
.deco-float-3 {
  top: 40%;
  right: 20%;
  width: 80px; height: 80px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
  animation: floatFast 5s ease-in-out infinite;
}
.deco-float-4 {
  bottom: 30%;
  left: 15%;
  width: 60px; height: 60px;
  border: 1.5px solid rgba(6, 182, 212, 0.12);
  animation: floatMid 8s ease-in-out infinite;
}

.deco-dot-grid {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  opacity: 0.6;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.15);
  font-size: 13px;
  color: var(--primary);
  font-weight: 500;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: var(--text-display);
  font-weight: 800;
  line-height: 1.08;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

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

.hero h1 .gradient-hero {
  background: linear-gradient(135deg, var(--primary) 0%, #6366f1 40%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: var(--radius-md);
  padding: 24px 12px;
  text-align: center;
  box-shadow: 0 1px 6px rgba(0,0,0,0.04);
  transition: all 0.35s var(--ease);
}

.hero-stat:hover {
  background: #fff;
  box-shadow: 0 8px 28px rgba(0,0,0,0.08);
  transform: translateY(-3px) scale(1.02);
}

.hero-stat strong {
  display: block;
  font-size: 34px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
  letter-spacing: -0.03em;
}

.hero-stat span {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 992px) {
  .hero h1 { font-size: 42px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero h1 { font-size: 30px; }
  .hero p { font-size: 16px; }
  .hero-stats { gap: 10px; }
  .hero-stat { padding: 14px 10px; }
  .hero-stat strong { font-size: 22px; }
}

/* ---------- CTA Section ---------- */
.cta-section {
  padding: var(--space-20) 0;
  background: linear-gradient(135deg, #dbeafe 0%, #eef2ff 50%, #dbeafe 100%);
  color: var(--text-primary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.04) 0%, transparent 60%);
  pointer-events: none;
}

.cta-section::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.05) 0%, transparent 70%);
  pointer-events: none;
  animation: floatSlow 8s ease-in-out infinite;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: var(--text-h1);
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary), var(--primary-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-content p {
  font-size: 17px;
  color: var(--text-muted);
  margin-bottom: 32px;
  line-height: 1.8;
}

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

@media (max-width: 640px) {
  .cta-section { padding: var(--space-16) 0; }
  .cta-content h2 { font-size: 26px; }
}

/* ---------- Page Hero ---------- */
.page-hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--bg-page) 0%, #eef2ff 50%, var(--bg-page) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero .hero-accent {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent-cyan));
}

.page-hero h1 {
  font-size: var(--text-hero);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}

.page-hero p {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

@media (max-width: 640px) {
  .page-hero { padding: 120px 0 50px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero p { font-size: 15px; }
}

/* ---------- About Page ---------- */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.mission-card {
  text-align: center;
  padding: 40px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: var(--transition);
}

.mission-card:hover {
  background: var(--bg-card);
  border-color: rgba(37, 99, 235, 0.18);
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.06);
}

.mission-card .icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary-bg), rgba(37, 99, 235, 0.15));
  border: 1px solid rgba(37, 99, 235, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34px;
  margin: 0 auto 20px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.04);
  transition: all 0.3s ease;
}

.mission-card:hover .icon {
  transform: scale(1.08);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.08);
}

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

.mission-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

@media (max-width: 992px) { .mission-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .mission-grid { grid-template-columns: 1fr; } }

/* ---------- Timeline ---------- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary), var(--accent-cyan), transparent);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 40px;
  position: relative;
}

.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }

.timeline-item .year {
  flex-shrink: 0;
  width: 100px;
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 700;
  font-size: 15px;
  position: relative;
  z-index: 1;
}

.timeline-item .content {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.3s ease;
}

.timeline-item .content:hover {
  border-color: rgba(37, 99, 235, 0.18);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.timeline-item .content h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.timeline-item .content p {
  font-size: 14px;
  color: var(--text-muted);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 20px;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: 3px solid var(--bg-deepest);
  z-index: 2;
}

@media (max-width: 768px) {
  .timeline::before { left: 20px; }
  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
    padding-left: 50px;
    gap: 16px;
  }
  .timeline-item .year {
    width: 80px;
    font-size: 14px;
    flex-shrink: 0;
  }
  .timeline-dot { left: 20px; }
}


/* ---------- Footer ---------- */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 32px;
  border-top: 3px solid;
  border-image: linear-gradient(90deg, var(--primary), var(--accent-cyan), transparent) 1;
}

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

.footer-brand .logo {
  color: #f1f5f9;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 320px;
}

.footer h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  color: #f1f5f9;
}

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

.footer ul a {
  font-size: 14px;
  color: #64748b;
  transition: var(--transition);
}

.footer ul a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #475569;
}

@media (max-width: 992px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* ---------- Scroll Animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s var(--ease);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- Floating Animations ---------- */
@keyframes floatSlow {
  0%, 100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-20px) scale(1.05); }
}
@keyframes floatMid {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33%      { transform: translateY(-14px) rotate(2deg); }
  66%      { transform: translateY(-6px) rotate(-1deg); }
}
@keyframes floatFast {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
@keyframes pulseGlow {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50%      { opacity: 0.6; transform: scale(1.15); }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* ---------- Services Grid (首页4大业务) ---------- */



/* ---------- About Page Styles ---------- */
.about-founder {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 40px;
  align-items: center;
}

.about-founder-img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.about-founder-text h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 4px;
}

.about-founder-text .founder-title {
  font-size: 16px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 16px;
}

.about-founder-text p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

@media (max-width: 768px) {
  .about-founder { grid-template-columns: 1fr; gap: 24px; }
  .about-founder-img { height: 280px; }
}

/* ---------- Timeline (about page) ---------- */
/* already defined earlier with .timeline */

/* ---------- Pricing Cards ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.price-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  border-radius: 20px;
  border: 1px solid var(--border);
  padding: 24px 22px 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}

.price-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.15);
}

.price-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}

.price-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.price {
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-num {
  font-size: 20px;
  font-weight: 700;
  color: #0f172a;
}

.price-num-main {
  font-size: 24px;
  color: #1d4ed8;
}

.price-unit {
  font-size: 13px;
  color: #64748b;
}

.price-card .price-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin: 6px 0 10px;
}

/* 列表统一控制高度，让下方按钮对齐 */
.price-card .list {
  margin: 0;
  padding-left: 0;
  list-style: none;
  font-size: 13px;
  color: var(--text-muted, #667085);
  display: grid;
  gap: 6px;
}

.price-card .list li {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  font-size: 13px;
  color: var(--text-muted, #667085);
  line-height: 1.6;
}

.price-card .list li::before {
  content: "✓";
  color: var(--primary, #2563eb);
  font-weight: 700;
  font-size: 13px;
  flex-shrink: 0;
  margin-top: 1px;
}

@media (min-width: 769px) {
  .price-card .list { min-height: 150px; }
}

@media (max-width: 768px) {
  .price-card .list { min-height: auto; }
  .price-card-hot { transform: none; }
  .price-card { padding: 18px 16px 16px; }
  .price-card .btn,
  .price-card a.btn,
  .price-card a.btn-primary,
  .price-card a.btn-secondary {
    width: 100%;
    text-align: center;
    display: block;
    box-sizing: border-box;
    padding: 10px 0;
    font-size: 14px;
  }
}

.price-card-hot {
  border-color: rgba(37,99,235,0.35);
  box-shadow: 0 8px 24px rgba(15,23,42,0.18);
}

.price-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  background: rgba(37,99,235,0.10);
  border: 1px solid rgba(37,99,235,0.25);
  color: #1d4ed8;
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
}

@media (max-width: 992px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

/* ---------- CTA 底部通栏 ---------- */
.cta-bottom {
  text-align: center;
  background: linear-gradient(135deg, #e0edff 0%, #eef2ff 100%);
  border-radius: 20px;
  padding: 36px 24px 32px;
}
.cta-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary, #172033);
  margin-bottom: 10px;
  line-height: 1.4;
}
.cta-subtitle {
  font-size: 14px;
  color: var(--text-muted, #667085);
  max-width: 520px;
  margin: 0 auto 20px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}
@media (max-width: 640px) {
  .cta-bottom { padding: 24px 16px 20px; border-radius: 14px; }
  .cta-title { font-size: 18px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { text-align: center; }
}

/* ---------- Contact Card Grid ---------- */
.contact-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 720px;
  margin: 0 auto 40px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 24px;
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  opacity: 0;
  transition: opacity 0.35s ease;
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.08);
  border-color: rgba(37, 99, 235, 0.18);
}

.contact-card:hover::before {
  opacity: 1;
}

.contact-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary-bg), rgba(37, 99, 235, 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
  border: 1px solid rgba(37, 99, 235, 0.08);
  transition: all 0.35s ease;
}

.contact-card:hover .contact-card-icon {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.10);
}

.contact-card h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.contact-card-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.5;
}

.contact-card-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .contact-card-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .contact-card {
    padding: 22px 18px;
  }
  .contact-card-icon {
    width: 42px;
    height: 42px;
    font-size: 18px;
  }
  .contact-card-value {
    font-size: 14px;
  }
}

/* ---------- WeChat ID List ---------- */
.wechat-id-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.wechat-id {
  display: inline-block;
  background: rgba(37, 99, 235, 0.08);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  font-style: italic;
  letter-spacing: 0.3px;
  cursor: pointer;
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.wechat-id:hover {
  background: rgba(37, 99, 235, 0.15);
  box-shadow: 0 1px 4px rgba(37, 99, 235, 0.15);
}

.wechat-sep {
  color: var(--text-muted);
  font-size: 13px;
  font-style: normal;
  opacity: 0.45;
}

.copy-hint {
  font-style: italic;
  font-size: 12px;
  color: var(--text-muted);
  opacity: 0.65;
  margin-top: 6px;
  letter-spacing: 0.2px;
}

/* ---------- Partner Spotlight (首页合作生态) ---------- */
.partner-spotlight-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 24px;
}

.partner-spotlight-head h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  margin: 12px 0 10px;
}

.partner-spotlight-head p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin: 0 auto;
}

.partner-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.partner-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.partner-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.partner-card-link:hover {
  text-decoration: none;
  transform: translateY(-4px);
  border-color: rgba(37, 99, 235, 0.18);
  box-shadow: var(--shadow-md);
}

.partner-card-link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
}

.partner-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.partner-card-mark {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.2px;
}

.partner-card-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-bg);
  border: 1px solid rgba(37, 99, 235, 0.12);
}

.partner-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.partner-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 0;
}

.partner-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.partner-card-list li {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 2;
  padding-left: 16px;
  position: relative;
}

.partner-card-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 13px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--primary);
}

@media (max-width: 768px) {
  .partner-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .partner-spotlight-head h3 {
    font-size: 18px;
  }

  .partner-card {
    padding: 18px 16px;
  }
}

/* ---------- Shot Grid (功能实拍) ---------- */
.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.shot-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: all .35s ease;
}
.shot-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37,99,235,.12);
  border-color: rgba(37,99,235,.20);
}
.shot-card img { width: 100%; display: block; object-fit: cover; }
.shot-card .shot-caption { padding: 18px 22px; }
.shot-card .shot-caption h4 {
  font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 6px;
}
.shot-card .shot-caption p {
  font-size: 13px; color: var(--text-muted); line-height: 1.7;
}
@media (max-width: 768px) { .shot-grid { grid-template-columns: 1fr; } }

/* ---------- About Hero Badge ---------- */
.about-hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: 999px;
  background: rgba(37,99,235,.08);
  border: 1px solid rgba(37,99,235,.15);
  font-size: 13px; color: var(--primary); font-weight: 500;
  margin-bottom: 20px;
}

/* ---------- Value Grid (价值观) ---------- */
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.value-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 24px;
  transition: all .35s ease;
  position: relative;
  overflow: hidden;
}
.value-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  opacity: 0;
  transition: opacity .3s ease;
}
.value-card:nth-child(1)::before { background: linear-gradient(90deg,#2563eb,#06b6d4); }
.value-card:nth-child(2)::before { background: linear-gradient(90deg,#8b5cf6,#2563eb); }
.value-card:nth-child(3)::before { background: linear-gradient(90deg,#059669,#06b6d4); }
.value-card:hover::before { opacity: 1; }
.value-card:hover {
  background: var(--glass-hover-bg);
  border-color: rgba(37,99,235,.18);
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(37,99,235,.10);
}
.value-card .v-num {
  font-size: 13px; font-weight: 700; color: var(--primary);
  margin-bottom: 10px; letter-spacing: .5px;
}
.value-card h4 {
  font-size: 17px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px;
}
.value-card p {
  font-size: 14px; color: var(--text-muted); line-height: 1.75;
}
@media (max-width: 992px) {
  .mission-grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .mission-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
}

/* ---------- Cap Grid (核心能力) ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cap-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 22px 24px;
  transition: all .35s ease;
}
.cap-card:hover {
  background: var(--glass-hover-bg);
  border-color: rgba(37,99,235,.18);
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(37,99,235,.10);
}
.cap-card h4 {
  font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 10px;
}
.cap-card ul { list-style: none; padding: 0; margin: 0; }
.cap-card li {
  font-size: 13px; color: var(--text-muted);
  line-height: 2; padding-left: 14px; position: relative;
}
.cap-card li::before {
  content: '';
  position: absolute; left: 0; top: 11px;
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--primary);
}
@media (max-width: 992px) { .cap-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .cap-grid { grid-template-columns: 1fr; } }

/* ---------- Custom Dev (定制开发) ---------- */
.custom-dev-section { padding: 80px 0; }
.custom-dev-header { text-align: center; margin-bottom: 48px; }
.custom-dev-header .tag {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  background: rgba(37,99,235,.08); color: var(--primary);
  font-size: 13px; font-weight: 600; margin-bottom: 16px;
  border: 1px solid rgba(37,99,235,.15);
}
.custom-dev-header h2 {
  font-size: 38px; font-weight: 800; color: var(--text-primary);
  line-height: 1.15; margin-bottom: 16px; letter-spacing: -.02em;
}
.custom-dev-header p {
  font-size: 17px; color: var(--text-muted);
  max-width: 560px; margin: 0 auto; line-height: 1.8;
}
.custom-promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
.custom-promise-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all .35s ease;
}
.custom-promise-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: 20px 20px 0 0;
  opacity: 0;
  transition: opacity .3s ease;
}
.custom-promise-card:nth-child(1)::before { background: linear-gradient(90deg,#2563eb,#06b6d4); }
.custom-promise-card:nth-child(2)::before { background: linear-gradient(90deg,#8b5cf6,#2563eb); }
.custom-promise-card:nth-child(3)::before { background: linear-gradient(90deg,#059669,#06b6d4); }
.custom-promise-card:hover::before { opacity: 1; }
.custom-promise-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37,99,235,.12);
  border-color: rgba(37,99,235,.20);
}
.promise-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px; border-radius: 14px;
  font-size: 22px; font-weight: 900; color: #fff;
  margin: 0 auto 20px;
}
.custom-promise-card:nth-child(1) .promise-num { background: linear-gradient(135deg,#2563eb,#06b6d4); }
.custom-promise-card:nth-child(2) .promise-num { background: linear-gradient(135deg,#8b5cf6,#2563eb); }
.custom-promise-card:nth-child(3) .promise-num { background: linear-gradient(135deg,#059669,#06b6d4); }
.custom-promise-card h3 {
  font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 10px;
}
.custom-promise-card h3 .hl { color: var(--primary); }
.custom-promise-card p {
  font-size: 14px; color: var(--text-muted); line-height: 1.75;
}
.custom-scene-header { text-align: center; margin-bottom: 36px; }
.custom-scene-header h2 {
  font-size: 28px; font-weight: 800; color: var(--text-primary); margin-bottom: 12px;
}
.custom-scene-header p {
  font-size: 15px; color: var(--text-muted); line-height: 1.8;
}
.custom-scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.custom-scene-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 22px 24px;
  text-align: center;
  transition: all .35s ease;
}
.custom-scene-card:hover {
  background: var(--glass-hover-bg);
  border-color: rgba(37,99,235,.18);
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(37,99,235,.10);
}
.scene-icon {
  width: 56px; height: 56px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin: 0 auto 16px;
  background: linear-gradient(135deg,rgba(37,99,235,.08),rgba(37,99,235,.15));
  border: 1px solid rgba(37,99,235,.08);
  transition: all .3s ease;
}
.custom-scene-card:hover .scene-icon {
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(37,99,235,.12);
}
.custom-scene-card h4 {
  font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px;
}
.custom-scene-card p {
  font-size: 13px; color: var(--text-muted); line-height: 1.7;
}
.scene-badge {
  display: inline-block; margin-top: 12px; padding: 3px 10px;
  border-radius: 999px; font-size: 11px; font-weight: 600;
  background: rgba(37,99,235,.08); color: var(--primary);
  border: 1px solid rgba(37,99,235,.15);
}
@media (max-width: 992px) { .custom-scene-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) {
  .custom-promise-grid { grid-template-columns: 1fr; gap: 16px; }
  .custom-scene-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .custom-dev-header h2 { font-size: 24px; }
}
@media (max-width: 480px) { .custom-scene-grid { grid-template-columns: 1fr; } }


/* ---------- 语义化工具类（内联样式提炼） ---------- */
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #34d399; display: inline-block;
}
.hero-desc {
  font-size: 17px; color: var(--text-muted);
  max-width: 640px; margin: 20px auto 0; line-height: 1.9;
}
.section-tight { padding-top: 8px; padding-bottom: 0; }
.grid-stretch { gap: 28px; align-items: stretch; }
.badge-mb { margin-bottom: 10px; }
.card-title-lg { font-size: 20px; margin-bottom: 8px; }
.card-desc {
  font-size: 14px; color: var(--text-muted); margin-bottom: 12px;
}
.eco-note { margin-top: 16px; font-size: 13px; color: var(--text-muted); }
.link-inline { color: var(--primary); text-decoration: underline; }
.partner-mt { margin-top: 36px; }
.btn-block { width: 100%; margin-top: 16px; text-align: center; }
.trial-note {
  text-align: center; font-size: 12px;
  color: var(--text-muted); margin-top: 8px;
}
.price-head-row { display: flex; align-items: center; gap: 6px; }
.compare-wrap {
  margin-top: 40px; max-width: 960px;
  margin-left: auto; margin-right: auto;
}
.p-mt { margin-top: 16px; }
.text-accent { color: var(--primary); }
.value-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.value-title-mt {
  font-size: 20px; font-weight: 700;
  margin-bottom: 8px; margin-top: 24px;
}
.eco-badge-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }
.eco-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 999px;
  font-size: 12px; font-weight: 600; border: 1px solid;
}
.eco-badge-blue {
  background: rgba(37,99,235,.08); color: var(--primary);
  border-color: rgba(37,99,235,.15);
}
.eco-badge-purple {
  background: rgba(139,92,246,.08); color: #7c3aed;
  border-color: rgba(139,92,246,.15);
}
.features-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card-col { display: flex; flex-direction: column; }
.product-title { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.product-desc {
  font-size: 14px; color: var(--text-muted);
  line-height: 1.7; flex: 1;
}
.card-foot {
  margin-top: 16px; padding-top: 14px;
  border-top: 1px solid var(--border-light);
}
.badge-red {
  background: rgba(239,68,68,.10); color: #dc2626;
  border-color: rgba(239,68,68,.18);
}

/* ---------- Lead Form (在线留资) ---------- */
.lead-form-wrap {
  max-width: 720px;
  margin: 48px auto 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
}
.lead-form-head { text-align: center; margin-bottom: 28px; }
.lead-form-head h3 {
  font-size: 22px; font-weight: 800; color: var(--text-primary); margin-bottom: 8px;
}
.lead-form-head p {
  font-size: 14px; color: var(--text-muted); line-height: 1.7;
}
.lead-form { display: flex; flex-direction: column; gap: 18px; }
.lead-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.lead-form-field { display: flex; flex-direction: column; gap: 6px; }
.lead-form-field label {
  font-size: 13px; font-weight: 600; color: var(--text-secondary);
}
.lead-form-field label span { color: #dc2626; }
.lead-form-field input,
.lead-form-field select,
.lead-form-field textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  box-sizing: border-box;
}
.lead-form-field input:focus,
.lead-form-field select:focus,
.lead-form-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.10);
}
.lead-form-field textarea { resize: vertical; min-height: 90px; }
.lead-form-actions { margin-top: 4px; }
.lead-form-note {
  text-align: center; font-size: 12px;
  color: var(--text-muted); margin-top: 10px;
}
@media (max-width: 640px) {
  .lead-form-wrap { padding: 26px 20px; margin-top: 32px; }
  .lead-form-row { grid-template-columns: 1fr; gap: 14px; }
}

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(37, 99, 235, 0.15);
  background: var(--bg-card);
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s, background 0.25s, color 0.25s;
  z-index: 950;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
}
@media (max-width: 640px) {
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
}

/* ---------- 404 Page ---------- */
.error-404 {
  text-align: center;
  padding: 40px 0 20px;
}
.error-code {
  font-size: 120px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 50%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  animation: shimmer 4s linear infinite;
}
.error-404 h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.error-404 p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}
.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.error-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 14px;
}
.error-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.25s ease;
}
.error-links a:hover {
  color: var(--primary);
}
.error-links span {
  color: var(--border);
}
@media (max-width: 640px) {
  .error-code { font-size: 84px; }
  .error-404 h1 { font-size: 26px; }
  .error-404 p { font-size: 15px; }
}