/* ========================================
   首页样式 - 工程美学版本
   Engineering Aesthetics Home Page
   ======================================== */

/* 全局Section交替背景 */
.section-dark {
  background: var(--color-bg-primary);
}

.section-light {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-accent {
  background: linear-gradient(180deg, 
    rgba(59, 130, 246, 0.05) 0%, 
    var(--color-bg-secondary) 50%,
    rgba(59, 130, 246, 0.03) 100%
  );
  border-top: 1px solid rgba(59, 130, 246, 0.1);
  border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

/* Hero Section - 结构化3D Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
  background: var(--color-bg-primary);
}

/* Hero 3D Canvas 容器 */
.hero #hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero #hero-canvas canvas {
  width: 100% !important;
  height: 100% !important;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-brand-primary), transparent);
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: var(--space-16) 0;
}

/* Hero Label - 工程标签 */
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-2) var(--space-4);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-brand-secondary);
}

.hero-label::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-brand-primary);
  border-radius: 50%;
  animation: pulse-glow 2s ease-in-out infinite;
}

/* Hero Title - 工程化标题 */
.hero-title {
  font-size: var(--text-6xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--space-8);
  max-width: 900px;
  letter-spacing: -0.03em;
}

.hero-title .text-gradient {
  font-weight: 700;
}

/* Hero Subtitle - 技术副标题 */
.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 560px;
  margin-bottom: var(--space-10);
  line-height: 1.8;
}

/* Hero CTA - 工程按钮组 */
.hero-cta {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-20);
}

/* Hero Stats - 工程指标 */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--color-border);
  position: relative;
}

.hero-stats::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 100px;
  height: 1px;
  background: var(--gradient-accent);
}

.stat-item {
  text-align: left;
  padding: var(--space-8) var(--space-6);
  border-right: 1px solid var(--color-border);
  position: relative;
}

.stat-item:last-child {
  border-right: none;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  width: 20px;
  height: 2px;
  background: var(--color-brand-primary);
  opacity: 0;
  transition: opacity var(--duration-base);
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  font-feature-settings: 'tnum' 1;
}

.stat-number span {
  color: var(--color-brand-primary);
  font-weight: 500;
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Trust Section - 信任背书（深色背景 + 卡片式） */
.trust-section {
  padding: var(--space-24) 0;
  background: linear-gradient(180deg, 
    rgba(8, 10, 15, 0.98) 0%, 
    rgba(5, 7, 12, 0.99) 100%
  );
  position: relative;
  overflow: hidden;
  z-index: 2;
}

.trust-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.4), 
    rgba(34, 211, 238, 0.4), 
    transparent
  );
}

.trust-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.2), 
    transparent
  );
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-4);
}

.trust-item {
  background: linear-gradient(135deg, 
    rgba(30, 35, 45, 0.5) 0%, 
    rgba(20, 25, 35, 0.6) 100%
  );
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  backdrop-filter: blur(10px);
}

.trust-item:hover {
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateY(-4px);
  background: linear-gradient(135deg, 
    rgba(40, 50, 65, 0.6) 0%, 
    rgba(30, 40, 55, 0.7) 100%
  );
  box-shadow: 
    0 15px 30px rgba(0, 0, 0, 0.3),
    0 0 20px rgba(59, 130, 246, 0.1);
}

.trust-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: var(--space-8);
  background: linear-gradient(to bottom, var(--color-brand-primary), transparent);
}

.trust-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.trust-header h2 {
  font-size: var(--text-xl);
  margin-top: var(--space-4);
  color: var(--color-text-tertiary);
  font-weight: 400;
}

/* 信任网格 - 完全响应式修复 */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-6);
  align-items: stretch;
}

.trust-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base) var(--ease-engineering);
  min-height: 100px;
  background: var(--color-bg-tertiary);
  position: relative;
  overflow: hidden;
}

.trust-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(59,130,246,0.05), transparent);
  opacity: 0;
  transition: opacity var(--duration-base);
}

.trust-item:hover {
  border-color: var(--color-border-brand);
  background: var(--color-bg-elevated);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.trust-item:hover::before {
  opacity: 1;
}

.trust-logo {
  width: 100%;
  max-width: 160px;
  opacity: 0.7;
  transition: all var(--duration-base);
  position: relative;
  z-index: 1;
}

.trust-logo svg {
  width: 100%;
  height: auto;
  display: block;
  max-height: 50px;
}

/* SVG 文字样式优化 */
.trust-logo svg text {
  font-family: var(--font-primary);
  font-weight: 500;
  dominant-baseline: middle;
}

.trust-item:hover .trust-logo {
  opacity: 1;
  transform: scale(1.05);
}

/* 信任背书 - 新增品牌标识样式 */
.trust-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.trust-brand-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
}

/* Value Section - 核心价值（浅色背景 + 卡片式） */
.value-section {
  position: relative;
  overflow: hidden;
  padding: var(--space-32) 0;
  z-index: 2;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.value-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 50% 30% at 10% 20%, rgba(59, 130, 246, 0.05), transparent),
    radial-gradient(ellipse 40% 25% at 90% 80%, rgba(34, 211, 238, 0.03), transparent);
  pointer-events: none;
}

.value-section .bg-glow {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -200px;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-tertiary);
  margin-top: var(--space-4);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.value-card {
  background: linear-gradient(135deg, 
    rgba(255, 255, 255, 0.03) 0%, 
    rgba(255, 255, 255, 0.01) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-base) var(--ease-engineering);
  position: relative;
  backdrop-filter: blur(10px);
  box-shadow: 
    0 4px 6px rgba(0, 0, 0, 0.1),
    0 1px 3px rgba(0, 0, 0, 0.08);
}

.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: all var(--duration-base);
  border-radius: 0 0 2px 2px;
}

.value-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-6px);
  background: linear-gradient(135deg, 
    rgba(59, 130, 246, 0.08) 0%, 
    rgba(255, 255, 255, 0.02) 100%
  );
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.3),
    0 0 30px rgba(59, 130, 246, 0.1);
}

.value-card:hover::before {
  opacity: 1;
  width: 80px;
}

.value-icon {
  width: 48px;
  height: 48px;
  color: var(--color-brand-primary);
  margin-bottom: var(--space-6);
}

.value-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.value-card p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.7;
}

/* Services Section - 工程化服务（深色背景） */
.services-section {
  background: var(--color-bg-primary);
  padding: var(--space-32) 0;
  position: relative;
  z-index: 2;
}

.services-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.4), 
    rgba(34, 211, 238, 0.4), 
    transparent
  );
}

.services-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.2), 
    transparent
  );
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.service-card {
  background: linear-gradient(145deg, 
    rgba(30, 30, 35, 0.8) 0%, 
    rgba(20, 20, 25, 0.9) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--duration-base);
  position: relative;
  backdrop-filter: blur(10px);
  box-shadow: 
    0 4px 6px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--space-6);
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: all var(--duration-base);
  border-radius: 0 0 2px 2px;
}

.service-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  background: linear-gradient(145deg, 
    rgba(40, 45, 55, 0.9) 0%, 
    rgba(30, 35, 45, 0.95) 100%
  );
  transform: translateY(-6px);
  box-shadow: 
    0 25px 50px rgba(0, 0, 0, 0.4),
    0 0 40px rgba(59, 130, 246, 0.15),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.service-card:hover::before {
  width: 60px;
}

.service-number {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-brand-primary);
  margin-bottom: var(--space-4);
  font-weight: 500;
}

.service-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.service-card > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.service-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

.service-list li {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  padding-left: var(--space-4);
  position: relative;
}

.service-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--color-brand-primary);
  font-weight: 600;
}

/* Method Section - 方法论（浅色背景） */
.method-section {
  position: relative;
  overflow: hidden;
  padding: var(--space-32) 0;
  z-index: 2;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.method-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse 60% 40% at 20% 50%, rgba(59, 130, 246, 0.04), transparent),
    radial-gradient(ellipse 50% 30% at 80% 30%, rgba(34, 211, 238, 0.03), transparent);
  pointer-events: none;
}

.method-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-20);
  align-items: center;
}

.method-text h2 {
  font-size: var(--text-3xl);
  margin: var(--space-4) 0 var(--space-6);
}

.method-text > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-10);
  font-size: var(--text-lg);
  line-height: 1.7;
}

.method-steps {
  margin-bottom: var(--space-10);
  border-left: 1px solid var(--color-border);
  padding-left: var(--space-6);
}

.method-step {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  position: relative;
}

.method-step::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-6) - 1px);
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--color-border-strong);
}

.method-step:first-child::before {
  background: var(--color-brand-primary);
}

.step-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-brand-primary);
  min-width: 32px;
  font-weight: 500;
}

.step-content h4 {
  font-size: var(--text-base);
  margin-bottom: var(--space-1);
  font-weight: 600;
}

.step-content p {
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* Process Diagram - 流程图 */
.method-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.process-diagram {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-8);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  position: relative;
}

/* Grid 布局类 - 类似 Tailwind 的 grid-cols-2 */
.process-diagram.grid-cols-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.process-diagram::before {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius-xl) - 1px);
  background: linear-gradient(135deg, rgba(59,130,246,0.1), transparent);
  pointer-events: none;
}

.process-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-width: 80px;
  transition: all var(--duration-base);
}

.process-node.active {
  border-color: var(--color-brand-primary);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.process-node:hover {
  border-color: var(--color-border-strong);
}

.node-icon {
  font-size: 20px;
}

.node-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.process-line {
  width: 40px;
  height: 1px;
  background: var(--color-border-strong);
  position: relative;
}

.process-line::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-left-color: var(--color-border-strong);
}

/* Cases Section - 案例（深色背景） */
.cases-section {
  background: var(--color-bg-primary);
  padding: var(--space-32) 0;
  position: relative;
  z-index: 2;
}

.cases-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.3), 
    transparent
  );
}

.cases-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.2), 
    transparent
  );
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.case-card {
  background: linear-gradient(145deg, 
    rgba(30, 30, 35, 0.8) 0%, 
    rgba(20, 20, 25, 0.9) 100%
  );
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--duration-base) var(--ease-engineering);
  box-shadow: 
    0 4px 6px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.case-card:hover {
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-8px);
  box-shadow: 
    0 30px 60px rgba(0, 0, 0, 0.5),
    0 0 40px rgba(59, 130, 246, 0.15);
}

.case-image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--color-bg-surface);
  position: relative;
}

.case-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.5));
}

.case-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.case-placeholder svg {
  width: 100%;
  height: 100%;
}

.case-content {
  padding: var(--space-6);
}

.case-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-brand-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  background: rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}

.case-card h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  font-weight: 600;
}

.case-card p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.case-link {
  font-size: var(--text-sm);
  color: var(--color-brand-primary);
  transition: color var(--duration-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.case-link::after {
  content: '→';
  transition: transform var(--duration-base);
}

.case-link:hover {
  color: var(--color-brand-secondary);
}

.case-link:hover::after {
  transform: translateX(4px);
}

/* CTA Section（浅色背景 + 渐变光效） */
.cta-section {
  padding: var(--space-32) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
  z-index: 2;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(59, 130, 246, 0.4), 
    rgba(34, 211, 238, 0.4), 
    transparent
  );
}

.cta-section::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(59, 130, 246, 0.08), transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-4);
  font-weight: 600;
}

.cta-content p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.cta-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
}

/* ========================================
   价值句+图标样式
   ======================================== */
.value-propositions {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-top: var(--space-8);
  flex-wrap: wrap;
}

.value-prop-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-base);
}

.value-prop-item:hover {
  border-color: var(--color-border-brand);
  transform: translateY(-2px);
}

.value-prop-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.value-prop-text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* 服务模块价值句样式 */
.service-value-props {
  display: flex;
  justify-content: center;
  gap: var(--space-6);
  margin-top: var(--space-8);
  flex-wrap: wrap;
}

.sv-prop-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-brand-dim);
  border: 1px solid var(--color-border-brand);
  border-radius: var(--radius-md);
  transition: all var(--duration-base);
}

.sv-prop-item:hover {
  background: rgba(59, 130, 246, 0.15);
  transform: translateY(-1px);
}

.sv-prop-icon {
  width: 18px;
  height: 18px;
  color: var(--color-brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sv-prop-icon svg {
  width: 100%;
  height: 100%;
}

.sv-prop-text {
  font-size: var(--text-sm);
  color: var(--color-brand-secondary);
  font-weight: 500;
  white-space: nowrap;
}

/* ========================================
   服务卡片折叠样式（移动端）
   ======================================== */
.service-card[data-collapsible] {
  overflow: hidden;
}

.service-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  cursor: pointer;
}

.service-card-header h3 {
  flex: 1;
  margin: 0;
}

.service-toggle {
  display: none;
  width: 32px;
  height: 32px;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--duration-fast);
  color: var(--color-text-secondary);
}

.service-toggle:hover {
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
}

.service-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform var(--duration-fast);
}

.service-toggle[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.service-card-body {
  transition: all var(--duration-base);
}

/* ========================================
   案例滑动卡片（移动端）
   ======================================== */
.desktop-only {
  display: grid;
}

.mobile-only {
  display: none;
}

.cases-slider {
  position: relative;
  overflow: hidden;
  margin: 0 calc(-1 * var(--space-4));
  padding: var(--space-2) var(--space-4);
}

.cases-slider-track {
  display: flex;
  gap: var(--space-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: var(--space-2) 0;
}

.cases-slider-track::-webkit-scrollbar {
  display: none;
}

.slide-card {
  flex: 0 0 85%;
  scroll-snap-align: center;
  margin-right: var(--space-2);
}

.slide-card:first-child {
  margin-left: var(--space-2);
}

.slider-indicators {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.slider-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-strong);
  border: none;
  cursor: pointer;
  transition: all var(--duration-fast);
  padding: 0;
  min-width: 44px;
  min-height: 44px;
  position: relative;
}

.slider-dot::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border-strong);
  transition: all var(--duration-fast);
}

.slider-dot.active::after {
  background: var(--color-brand-primary);
  width: 24px;
  border-radius: 4px;
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 1024px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stat-item {
    border-bottom: 1px solid var(--color-border);
  }
  
  .stat-item:nth-child(2) {
    border-right: none;
  }
  
  .trust-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
  }
  
  .trust-item {
    min-height: 90px;
    padding: var(--space-4);
  }
  
  .trust-logo {
    max-width: 130px;
  }
  
  .trust-logo svg {
    max-height: 45px;
  }
  
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .method-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }
  
  .method-visual {
    order: -1;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: var(--text-4xl);
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stat-item {
    padding: var(--space-6) var(--space-4);
  }
  
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
  
  .trust-item {
    min-height: 80px;
    padding: var(--space-3);
  }
  
  .trust-logo {
    max-width: 110px;
  }
  
  .trust-logo svg {
    max-height: 40px;
  }
  
  .trust-logo svg text {
    font-size: 11px;
  }
  
  .value-grid,
  .services-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }
  
  .service-list {
    grid-template-columns: 1fr;
  }
  
  /* 移动端流程图 - 2列 x 2行 Grid 布局 */
  .process-diagram {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
  }
  
  .process-diagram.grid-cols-2 {
    display: grid;
  }
  
  /* 移动端隐藏连接线 */
  .process-line {
    display: none;
  }
  
  /* 每个节点大小一致 */
  .process-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 0;
    padding: var(--space-4);
    gap: var(--space-2);
    aspect-ratio: 1;
    min-height: 100px;
  }
  
  .node-icon {
    font-size: 24px;
    line-height: 1;
  }
  
  .node-label {
    font-size: var(--text-sm);
    font-weight: 500;
  }
  
  .cta-buttons {
    flex-direction: column;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  /* 移动端价值句样式 */
  .value-propositions {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
  }
  
  .value-prop-item {
    justify-content: center;
  }
  
  .service-value-props {
    gap: var(--space-2);
    justify-content: flex-start;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-2);
    -webkit-overflow-scrolling: touch;
  }

  .sv-prop-item {
    flex-shrink: 0;
  }
  
  .sv-prop-item {
    flex-shrink: 0;
  }
  
  /* 移动端服务价值句图标优化 - 缩小尺寸 */
  .sv-prop-icon {
    width: 14px;
    height: 14px;
  }
  
  .sv-prop-text {
    font-size: var(--text-xs);
  }
  
  /* 移动端服务卡片折叠 */
  .service-toggle {
    display: flex;
  }
  
  .service-card[data-collapsible] .service-card-body {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
  }
  
  .service-card[data-collapsible].expanded .service-card-body {
    max-height: 500px;
    opacity: 1;
    margin-top: var(--space-4);
  }
  
  /* 移动端案例滑动卡片 */
  .desktop-only {
    display: none;
  }
  
  .mobile-only {
    display: block;
  }
  
  /* 触控区域优化 */
  .btn,
  .nav-link,
  .pain-point-card,
  .case-link,
  .service-toggle {
    min-height: 44px;
    min-width: 44px;
  }
  
  /* 轻盈留白优化 */
  .section {
    padding: var(--space-16) 0;
  }
  
  .section-header {
    margin-bottom: var(--space-10);
  }
  
  .value-section,
  .services-section,
  .cases-section,
  .cta-section {
    padding: var(--space-20) 0;
  }
  
  /* 案例卡片滑动样式 */
  .slide-card {
    flex: 0 0 85%;
  }
}

/* 超小屏手机优化 */
@media (max-width: 480px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }
  
  .trust-item {
    min-height: 70px;
    padding: var(--space-3);
  }
  
  .trust-logo {
    max-width: 100px;
  }
  
  .trust-logo svg {
    max-height: 35px;
  }
  
  .trust-logo svg text {
    font-size: 10px;
  }
  
  /* 移动端底部固定CTA优化 */
  .mobile-sticky-cta {
    padding: var(--space-3) var(--space-4);
    gap: var(--space-3);
  }
  
  .mobile-sticky-cta .btn {
    min-height: 48px;
    font-size: var(--text-base);
    font-weight: 600;
  }
  
  /* 更轻盈的行间距 */
  .hero-subtitle {
    line-height: 1.7;
  }
  
  .value-card p,
  .service-card > p,
  .case-card p {
    line-height: 1.7;
  }
  
  /* 滑动卡片优化 */
  .slide-card {
    flex: 0 0 90%;
  }
  
  /* 超小屏幕流程图优化 - 2列 x 2行 */
  .process-diagram {
    gap: var(--space-3);
    padding: var(--space-3);
    max-width: 280px;
  }
  
  .process-node {
    padding: var(--space-3);
    min-height: 85px;
  }
  
  .node-icon {
    font-size: 20px;
  }
  
  .node-label {
    font-size: var(--text-xs);
  }