/* ========================================
   鲸晶洗洗衣洗鞋 - 官网样式
   ======================================== */

:root {
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --primary-light: #3385ff;
  --accent: #00d4aa;
  --accent-dark: #00b894;
  --dark: #0a0f1c;
  --dark-light: #141b2d;
  --dark-card: #1a2238;
  --gray-100: #f8fafc;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.2);
  --shadow-glow: 0 0 40px rgba(0, 102, 255, 0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --transition: all 0.3s ease;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-600);
  background: var(--white);
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(0, 102, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 102, 255, 0.5);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-full {
  width: 100%;
}

/* ========================================
   导航栏
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(10, 15, 28, 0.95);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 18px;
  color: var(--white);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--white);
  transition: var(--transition);
}

/* ========================================
   Hero 区域
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark);
  overflow: hidden;
}

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

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 102, 255, 0.3), transparent),
    radial-gradient(ellipse 60% 40% at 80% 60%, rgba(0, 212, 170, 0.15), transparent);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: calc(var(--header-height) + 60px) 24px 80px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 16px;
  background: rgba(0, 102, 255, 0.15);
  border: 1px solid rgba(0, 102, 255, 0.3);
  border-radius: 50px;
  font-size: 13px;
  color: var(--primary-light);
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--white);
  margin-bottom: 24px;
}

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

.hero-desc {
  font-size: 18px;
  color: var(--gray-400);
  max-width: 600px;
  margin-bottom: 40px;
}

.hero-desc strong {
  color: var(--accent);
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-item {
  text-align: left;
}

.stat-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--white);
}

.stat-suffix {
  font-size: 24px;
  font-weight: 600;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-size: 14px;
  color: var(--gray-400);
  margin-top: 4px;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--gray-500);
  font-size: 12px;
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--gray-500);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--primary);
  border-radius: 2px;
  animation: scroll 2s infinite;
}

@keyframes scroll {
  0%, 100% { opacity: 1; top: 8px; }
  50% { opacity: 0.3; top: 20px; }
}

/* ========================================
   通用 Section
   ======================================== */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 60px;
}

.section-header.light .section-title,
.section-header.light .section-desc {
  color: var(--white);
}

.section-tag {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  border-radius: 50px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  line-height: 1.3;
}

.section-desc {
  font-size: 16px;
  color: var(--gray-500);
}

/* ========================================
   关于我们
   ======================================== */
.about {
  background: var(--gray-100);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text {
  font-size: 16px;
  color: var(--gray-600);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-text strong {
  color: var(--dark);
}

.about-features {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  font-size: 28px;
  flex-shrink: 0;
}

.feature-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 14px;
  color: var(--gray-500);
}

.about-visual {
  position: relative;
}

.about-card {
  background: var(--dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.main-card {
  padding: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--gray-400);
  font-size: 13px;
  margin-bottom: 24px;
}

.card-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.dashboard-item {
  margin-bottom: 20px;
}

.dashboard-item:last-child {
  margin-bottom: 0;
}

.dash-label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 8px;
}

.dash-value {
  color: var(--white);
  font-weight: 500;
}

.dash-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.dash-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
  transition: width 1s ease;
}

.float-card {
  position: absolute;
  bottom: -20px;
  right: -20px;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--white);
  background: var(--primary);
  box-shadow: var(--shadow-glow);
}

.float-icon {
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

/* ========================================
   工厂实力
   ======================================== */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.strength-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  position: relative;
}

.strength-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.strength-card.featured {
  background: var(--dark);
  border-color: transparent;
  color: var(--gray-300);
}

.strength-card.featured h3 {
  color: var(--white);
}

.strength-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 10px;
  background: var(--gradient);
  color: var(--white);
  font-size: 11px;
  font-weight: 500;
  border-radius: 50px;
}

.strength-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 102, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.strength-card.featured .strength-icon {
  background: rgba(0, 102, 255, 0.2);
}

.strength-icon svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.strength-card.featured .strength-icon svg {
  color: var(--primary-light);
}

.strength-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 12px;
}

.strength-card p {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 16px;
  line-height: 1.7;
}

.strength-card.featured p {
  color: var(--gray-400);
}

.strength-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.strength-list li {
  font-size: 13px;
  color: var(--gray-500);
  padding-left: 16px;
  position: relative;
}

.strength-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.strength-card.featured .strength-list li {
  color: var(--gray-400);
}

/* ========================================
   服务项目
   ======================================== */
.services {
  background: var(--gray-100);
}

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

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.service-img {
  height: 160px;
  background-size: cover;
  background-position: center;
}

.service-img.sport { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.service-img.leather { background: linear-gradient(135deg, #8B4513 0%, #D2691E 100%); }
.service-img.luxury { background: linear-gradient(135deg, #1a1a2e 0%, #c9a227 100%); }
.service-img.outdoor { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); }
.service-img.canvas { background: linear-gradient(135deg, #ee9ca7 0%, #ffdde1 100%); }
.service-img.bulk { background: linear-gradient(135deg, #0066ff 0%, #00d4aa 100%); }

.service-content {
  padding: 24px;
}

.service-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}

.service-content p {
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 16px;
  line-height: 1.7;
}

.service-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 102, 255, 0.1);
  color: var(--primary);
  font-size: 12px;
  border-radius: 50px;
}

/* ========================================
   AI 管理
   ======================================== */
.ai-section {
  background: var(--dark);
  color: var(--gray-300);
}

.ai-section .section-tag {
  background: rgba(0, 212, 170, 0.15);
  color: var(--accent);
}

.ai-section .section-title {
  color: var(--white);
}

.ai-section .section-desc {
  color: var(--gray-400);
}

.ai-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.ai-features {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.ai-feature {
  display: flex;
  gap: 20px;
}

.ai-feature-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.6;
  flex-shrink: 0;
  width: 32px;
}

.ai-feature h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 6px;
}

.ai-feature p {
  font-size: 14px;
  color: var(--gray-400);
  line-height: 1.7;
}

.ai-dashboard {
  background: var(--dark-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-glow);
}

.ai-dashboard-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--white);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ai-status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.ai-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.ai-metric {
  background: rgba(255, 255, 255, 0.05);
  padding: 16px;
  border-radius: var(--radius-md);
}

.ai-metric-label {
  display: block;
  font-size: 12px;
  color: var(--gray-500);
  margin-bottom: 4px;
}

.ai-metric-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
}

.ai-metric-value.online {
  color: var(--accent);
}

.ai-metric-value.warning {
  color: #f59e0b;
}

.ai-chart {
  margin-bottom: 24px;
}

.chart-title {
  font-size: 13px;
  color: var(--gray-400);
  margin-bottom: 16px;
}

.chart-bars {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 100px;
}

.chart-bar {
  flex: 1;
  height: var(--h);
  background: rgba(0, 102, 255, 0.3);
  border-radius: 4px 4px 0 0;
  position: relative;
  transition: var(--transition);
}

.chart-bar.active {
  background: var(--gradient);
}

.chart-bar span {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 10px;
  color: var(--gray-500);
  white-space: nowrap;
}

.ai-alerts {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.alert-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--gray-300);
}

.alert-icon {
  flex-shrink: 0;
}

/* ========================================
   AI 运营
   ======================================== */
.ai-ops {
  background: linear-gradient(180deg, var(--dark-light) 0%, var(--dark) 100%);
  color: var(--gray-300);
}

.ai-ops .section-tag {
  background: rgba(0, 102, 255, 0.15);
  color: var(--primary-light);
}

.ops-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.ops-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
}

.ops-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
}

.ops-icon {
  font-size: 32px;
  margin-bottom: 16px;
}

.ops-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}

.ops-card p {
  font-size: 14px;
  color: var(--gray-400);
  line-height: 1.7;
}

.ops-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.ops-showcase-content h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}

.ops-showcase-content > p {
  font-size: 15px;
  color: var(--gray-400);
  margin-bottom: 24px;
}

.ops-benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ops-benefits li {
  font-size: 14px;
  color: var(--gray-300);
  padding-left: 24px;
  position: relative;
}

.ops-benefits li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}

.ops-screen {
  background: var(--dark-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--white);
  margin-bottom: 24px;
}

.screen-date {
  font-size: 12px;
  color: var(--gray-500);
}

.screen-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.screen-stat {
  text-align: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
}

.screen-stat-value {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.screen-stat-label {
  font-size: 11px;
  color: var(--gray-500);
}

.screen-chart {
  height: 80px;
  background: rgba(0, 102, 255, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}

.screen-line {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  height: 40px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  opacity: 0.5;
  clip-path: polygon(0 100%, 10% 60%, 25% 70%, 40% 40%, 55% 50%, 70% 20%, 85% 30%, 100% 10%, 100% 100%);
}

.screen-insight {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px;
  background: rgba(0, 212, 170, 0.1);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--gray-300);
}

.insight-badge {
  padding: 2px 8px;
  background: var(--accent);
  color: var(--dark);
  font-size: 10px;
  font-weight: 600;
  border-radius: 4px;
  flex-shrink: 0;
}

/* ========================================
   工艺流程
   ======================================== */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.process-step {
  text-align: center;
  padding: 24px 16px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.process-step:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.step-number {
  width: 40px;
  height: 40px;
  background: var(--gradient);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.process-step h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 8px;
}

.process-step p {
  font-size: 12px;
  color: var(--gray-500);
  line-height: 1.5;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners {
  background: var(--gray-100);
  padding: 80px 0;
  overflow: hidden;
}

.partners-marquee {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.partners-track {
  display: flex;
  gap: 60px;
  animation: marquee 30s linear infinite;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.partner-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--gray-400);
  white-space: nowrap;
  flex-shrink: 0;
  padding: 8px 24px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--gray-200);
}

/* ========================================
   联系我们
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-items {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
}

.contact-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 14px;
  color: var(--gray-500);
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ========================================
   常见问题
   ======================================== */
.faq {
  background: var(--gray-100);
}

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

.faq-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 20px;
  color: var(--primary);
  font-weight: 400;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item[open] summary::after {
  content: '−';
}

.faq-item p {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--gray-600);
  line-height: 1.8;
}

.faq-item a {
  color: var(--primary);
}

.faq-item a:hover {
  text-decoration: underline;
}

.footer-bottom a {
  color: var(--gray-400);
}

.footer-bottom a:hover {
  color: var(--white);
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--dark);
  color: var(--gray-400);
  padding: 60px 0 24px;
}

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

.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 16px;
}

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

.contact-item a {
  color: var(--primary);
}

.contact-item a:hover {
  text-decoration: underline;
}

.footer-links a {
  font-size: 14px;
  color: var(--gray-400);
}

.footer-links a:hover {
  color: var(--white);
}

.footer-links li {
  font-size: 14px;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--gray-500);
}

/* ========================================
   动画
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  .strength-grid,
  .services-grid,
  .ops-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-timeline {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(10, 15, 28, 0.98);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }

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

  .nav-link {
    display: block;
    padding: 12px 16px;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

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

  .about-grid,
  .ai-layout,
  .contact-grid,
  .ops-showcase {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .strength-grid,
  .services-grid,
  .ops-grid {
    grid-template-columns: 1fr;
  }

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

  .float-card {
    position: relative;
    bottom: auto;
    right: auto;
    margin-top: 16px;
  }

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

  .section {
    padding: 60px 0;
  }

  .hero-scroll {
    display: none;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .process-timeline {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 24px;
  }

  .ops-showcase {
    padding: 24px;
  }
}