/* ==========================================================================
   上海通由网络科技有限公司 - 全局样式
   设计系统：现代科技风（深色 + 渐变 + 玻璃拟态）
   ========================================================================== */

/* ---------- CSS 变量（设计令牌） ---------- */
:root {
  /* 主色 */
  --color-primary: #6366F1;
  --color-primary-light: #818CF8;
  --color-secondary: #8B5CF6;
  --color-accent: #06B6D4;
  --color-accent-light: #22D3EE;

  /* 背景 */
  --bg-primary: #0A0E27;
  --bg-secondary: #0F172A;
  --bg-tertiary: #1E293B;
  --bg-card: rgba(30, 41, 59, 0.5);

  /* 文字 */
  --text-primary: #FFFFFF;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-disabled: #64748B;

  /* 边框 */
  --border-color: rgba(148, 163, 184, 0.15);
  --border-color-hover: rgba(99, 102, 241, 0.5);

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #3B82F6 100%);
  --gradient-accent: linear-gradient(135deg, #06B6D4 0%, #6366F1 100%);
  --gradient-text: linear-gradient(135deg, #818CF8 0%, #C4B5FD 50%, #67E8F9 100%);
  --gradient-gold: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 32px rgba(99, 102, 241, 0.3);
  --shadow-glow-accent: 0 0 32px rgba(6, 182, 212, 0.3);

  /* 间距 */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* 字体 */
  --font-family-cn: "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", "Noto Sans CJK SC", sans-serif;
  --font-family-en: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", sans-serif;
  --font-family-mono: "SF Mono", "Monaco", "Cascadia Code", "Roboto Mono", monospace;

  /* 容器 */
  --container-max: 1200px;
  --container-padding: 1.5rem;

  /* 过渡 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 基础重置 ---------- */
*,
*::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-cn), var(--font-family-en);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 全局背景层（统一在所有页面底部） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

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

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

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

ul,
ol {
  list-style: none;
}

/* ---------- 通用排版 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.25rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.875rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.375rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p {
  color: var(--text-secondary);
  line-height: 1.75;
}

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

.text-mono {
  font-family: var(--font-family-mono);
  font-size: 0.875em;
  color: var(--text-muted);
}

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

.section {
  padding: var(--space-3xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--space-2xl);
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: var(--space-sm);
  padding: 0.4rem 0.9rem;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-full);
}

.section-title {
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s;
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  border-color: var(--border-color-hover);
  background: rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text-primary);
  padding: 0.625rem 1.25rem;
}

.btn-ghost:hover {
  color: var(--color-primary-light);
}

.btn-lg {
  padding: 1.125rem 2.25rem;
  font-size: 1.0625rem;
}

/* ---------- 导航栏 ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  transition: all var(--transition-base);
  background: transparent;
}

.nav.scrolled {
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.125rem;
}

.nav-brand img {
  width: 36px;
  height: 36px;
}

.nav-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-brand-name {
  color: var(--text-primary);
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.nav-brand-tag {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: all var(--transition-base);
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

.nav-toggle.active span { background: transparent; }
.nav-toggle.active span::before { transform: rotate(45deg); top: 0; }
.nav-toggle.active span::after { transform: rotate(-45deg); top: 0; }

/* ---------- Hero 区域 ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 8rem 0 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

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

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  max-width: 640px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.8;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: var(--space-xl);
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
}

.hero-stat-num {
  font-size: 1.875rem;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 0.4rem;
}

.hero-stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* Hero 视觉装饰 */
.hero-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  max-width: 520px;
  margin: 0 auto;
}

.hero-visual-card {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  animation: float 6s ease-in-out infinite;
}

.hero-visual-card svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.hero-visual-card.card-1 { top: 8%; left: 0; animation-delay: 0s; }
.hero-visual-card.card-2 { top: 38%; right: 0; animation-delay: 1.5s; }
.hero-visual-card.card-3 { bottom: 12%; left: 8%; animation-delay: 3s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-visual-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 60%;
  aspect-ratio: 1;
  background: var(--gradient-primary);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.55;
  z-index: -1;
  animation: glow 4s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { opacity: 0.55; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.8; transform: translate(-50%, -50%) scale(1.1); }
}

/* ---------- 价值主张 ---------- */
.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.value-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--transition-base);
  overflow: hidden;
}

.value-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.value-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
  box-shadow: var(--shadow-glow);
}

.value-card:hover::before {
  transform: scaleX(1);
}

.value-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary-light);
  margin-bottom: 1rem;
}

.value-icon svg {
  width: 24px;
  height: 24px;
}

.value-title {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.value-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ---------- 核心能力 ---------- */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.capability-card {
  position: relative;
  padding: 1.75rem;
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.5) 0%, rgba(15, 23, 42, 0.3) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-base);
  overflow: hidden;
}

.capability-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: var(--gradient-primary);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.capability-card:hover {
  transform: translateY(-6px);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(6, 182, 212, 0.05) 100%);
}

.capability-card:hover::after {
  opacity: 1;
}

.capability-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-glow-accent);
}

.capability-check svg {
  width: 18px;
  height: 18px;
  color: white;
}

.capability-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.capability-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- 使用场景 ---------- */
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.scenario-card {
  position: relative;
  padding: 2rem 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-base);
}

.scenario-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
}

.scenario-num {
  font-size: 2.5rem;
  font-weight: 800;
  font-family: var(--font-family-mono);
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.scenario-title {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.scenario-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.scenario-tag {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  color: var(--color-accent-light);
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: var(--radius-full);
}

/* ---------- 技术架构 ---------- */
.tech-section {
  position: relative;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.tech-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  text-align: center;
  transition: all var(--transition-base);
}

.tech-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
}

.tech-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 1.25rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow);
  position: relative;
}

.tech-icon-wrap::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  filter: blur(8px);
  opacity: 0.5;
  z-index: -1;
}

.tech-icon-wrap svg {
  width: 32px;
  height: 32px;
  color: white;
}

.tech-title {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.tech-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- 产品详情页：功能矩阵 ---------- */
.feature-matrix {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.feature-block {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-base);
  display: flex;
  gap: 1.25rem;
}

.feature-block:hover {
  border-color: var(--border-color-hover);
  transform: translateY(-3px);
}

.feature-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow-accent);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.feature-content {
  flex: 1;
}

.feature-title {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.feature-example {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  background: rgba(99, 102, 241, 0.08);
  border-left: 2px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-family-mono);
}

/* ---------- 产品详情页：工作流 ---------- */
.workflow {
  margin-top: 3rem;
  position: relative;
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  position: relative;
}

.workflow-step {
  text-align: center;
  position: relative;
  padding: 1.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-base);
}

.workflow-step:hover {
  transform: translateY(-3px);
  border-color: var(--border-color-hover);
}

.workflow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  border-radius: 50%;
  font-weight: 700;
  color: white;
  box-shadow: var(--shadow-glow);
}

.workflow-step-title {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.workflow-step-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ---------- 产品详情页：CTA Banner ---------- */
.cta-banner {
  position: relative;
  padding: 4rem 3rem;
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(6, 182, 212, 0.08) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  text-align: center;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 200%;
  background: var(--gradient-primary);
  filter: blur(80px);
  opacity: 0.2;
  z-index: -1;
}

.cta-banner h2 {
  margin-bottom: 1rem;
}

.cta-banner p {
  max-width: 600px;
  margin: 0 auto 2rem;
  font-size: 1.0625rem;
}

.cta-banner .btn-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ---------- 信任建立区 ---------- */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.trust-card {
  padding: 1.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  text-align: center;
  transition: all var(--transition-base);
}

.trust-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-color-hover);
}

.trust-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  background: var(--gradient-gold);
  border-radius: var(--radius-md);
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.3);
}

.trust-icon svg {
  width: 24px;
  height: 24px;
  color: white;
}

.trust-title {
  font-size: 1rem;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.trust-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.company-intro {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.company-intro-quote {
  font-size: 1.125rem;
  color: var(--text-primary);
  line-height: 1.8;
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.company-intro-meta {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ---------- 产品页：适用对象 ---------- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.audience-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  text-align: center;
  transition: all var(--transition-base);
}

.audience-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-color-hover);
}

.audience-emoji {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.audience-title {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.audience-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- 页面标题（产品页等子页面） ---------- */
.page-header {
  padding: 10rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: var(--gradient-primary);
  filter: blur(120px);
  opacity: 0.15;
  z-index: -1;
}

.page-header h1 {
  margin-bottom: 1rem;
}

.page-header-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}

/* ---------- Footer ---------- */
.footer {
  margin-top: var(--space-3xl);
  padding: var(--space-2xl) 0 var(--space-lg);
  background: rgba(10, 14, 39, 0.6);
  border-top: 1px solid var(--border-color);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: var(--space-xl);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
}

.footer-brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.footer-list li {
  margin-bottom: 0.6rem;
}

.footer-list a {
  font-size: 0.9375rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-legal {
  display: flex;
  gap: 1.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-legal a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.footer-legal .legal-police svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--color-accent);
}

/* ---------- 滚动动画 ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up[data-delay="100"] { transition-delay: 100ms; }
.fade-up[data-delay="200"] { transition-delay: 200ms; }
.fade-up[data-delay="300"] { transition-delay: 300ms; }
.fade-up[data-delay="400"] { transition-delay: 400ms; }

/* ---------- 响应式设计 ---------- */
@media (max-width: 968px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-visual {
    max-width: 400px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 720px) {
  :root {
    --container-padding: 1.25rem;
    --space-3xl: 4rem;
  }

  .nav-menu,
  .nav-actions .btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  /* 移动端菜单展开 */
  .nav-menu.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-color);
    margin-top: 0.5rem;
  }

  .nav-menu.open .nav-link {
    padding: 0.875rem 1rem;
    text-align: center;
  }

  .hero {
    padding: 7rem 0 3rem;
    min-height: auto;
  }

  .hero-stats {
    gap: 1.5rem;
  }

  .hero-stat-num {
    font-size: 1.5rem;
  }

  .hero-visual {
    display: none;
  }

  .cta-banner {
    padding: 3rem 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

@media (max-width: 480px) {
  .workflow-steps {
    grid-template-columns: 1fr;
  }

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

  .btn {
    width: 100%;
  }
}

/* ---------- 选区颜色 ---------- */
::selection {
  background: rgba(99, 102, 241, 0.4);
  color: white;
}

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 5px;
  border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}