/* ============================================
   宁波亮途照明科技有限公司 - 全局样式
   设计系统：精工照明工业风
   ============================================ */

/* --- CSS变量 / 设计系统 --- */
:root {
  --primary: #0F2036;
  --primary-light: #1a3354;
  --secondary-gold: #FFC107;
  --secondary-gold-dark: #e6ad00;
  --tech-blue: #1976D2;
  --tech-blue-light: #2196F3;
  --neutral-dark: #1E293B;
  --neutral-mid: #64748B;
  --neutral-light: #F8FAFC;
  --neutral-border: #E2E8F0;
  --white: #FFFFFF;
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-card-hover: 0 8px 32px rgba(15, 32, 54, 0.12);
  --shadow-nav: 0 2px 16px rgba(15, 32, 54, 0.06);
  --radius-btn: 4px;
  --radius-card: 8px;
  --transition-base: 220ms ease;
  --transition-smooth: 300ms ease;
  --letter-spacing-title: -0.4px;
}

/* --- 全局重置 --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--neutral-dark);
  background: var(--neutral-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

/* --- 标题层级 --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: var(--letter-spacing-title);
  color: var(--primary);
  line-height: 1.3;
}

h1 { font-size: 48px; }
h2 { font-size: 36px; }
h3 { font-size: 28px; }
h4 { font-size: 24px; }
h5 { font-size: 20px; }
h6 { font-size: 16px; }

@media (max-width: 768px) {
  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  h3 { font-size: 22px; }
  h4 { font-size: 20px; }
}

@media (max-width: 360px) {
  h1 { font-size: 28px; }
  h2 { font-size: 22px; }
  h3 { font-size: 20px; }
  h4 { font-size: 18px; }
}

/* --- 容器 --- */
.container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
}

@media (min-width: 768px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* --- 区块间距 --- */
.section {
  padding-top: 48px;
  padding-bottom: 48px;
}

@media (min-width: 768px) {
  .section {
    padding-top: 80px;
    padding-bottom: 80px;
  }
}

/* --- 按钮 --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: transform var(--transition-base), opacity var(--transition-base), background var(--transition-smooth);
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  transform: translateY(-1px);
}

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

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-light);
  box-shadow: 0 4px 16px rgba(15, 32, 54, 0.3);
}

.btn-gold {
  background: var(--secondary-gold);
  color: var(--primary);
}

.btn-gold:hover {
  background: var(--secondary-gold-dark);
  box-shadow: 0 4px 16px rgba(255, 193, 7, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

.btn-tech {
  background: var(--tech-blue);
  color: var(--white);
}

.btn-tech:hover {
  background: var(--tech-blue-light);
  box-shadow: 0 4px 16px rgba(25, 118, 210, 0.3);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 13px;
}

/* --- 卡片 --- */
.card {
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  overflow: hidden;
}

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

.card-body {
  padding: 24px;
}

/* --- 导航 --- */
.nav-main {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: var(--shadow-nav);
  transition: background var(--transition-smooth);
}

.nav-main.scrolled {
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
  color: var(--primary);
  letter-spacing: var(--letter-spacing-title);
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--secondary-gold);
  font-size: 20px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--neutral-mid);
  transition: color var(--transition-base);
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--secondary-gold);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  border: none;
  background: transparent;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

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

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

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

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 24px 32px;
    gap: 20px;
    box-shadow: var(--shadow-card);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition-smooth), opacity var(--transition-smooth);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }
}

/* --- 悬浮客服 --- */
.float-service {
  position: fixed;
  right: 16px;
  bottom: 100px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.float-item {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  cursor: pointer;
  transition: transform var(--transition-base), background var(--transition-base);
  position: relative;
}

.float-item:hover {
  background: var(--primary-light);
  transform: scale(1.08);
}

.float-tooltip {
  position: absolute;
  right: 60px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--white);
  color: var(--primary);
  padding: 10px 16px;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-card);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.float-item:hover .float-tooltip {
  opacity: 1;
  pointer-events: auto;
}

.float-wechat-popup {
  position: absolute;
  right: 60px;
  top: -40px;
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.float-wechat-popup.active {
  opacity: 1;
  pointer-events: auto;
}

.float-wechat-popup .qr-placeholder {
  width: 120px;
  height: 120px;
  background: var(--neutral-light);
  border: 2px solid var(--neutral-border);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-mid);
  font-size: 12px;
  text-align: center;
}

.float-wechat-popup .qr-label {
  text-align: center;
  font-size: 13px;
  color: var(--neutral-mid);
  margin-top: 8px;
}

/* --- 页脚 --- */
.footer {
  background: var(--primary);
  color: var(--neutral-light);
  padding-top: 64px;
  padding-bottom: 32px;
}

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

@media (max-width: 768px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 360px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: var(--letter-spacing-title);
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  color: var(--neutral-mid);
  line-height: 1.8;
  margin-bottom: 24px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--secondary-gold);
  margin-bottom: 16px;
  letter-spacing: var(--letter-spacing-title);
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--neutral-mid);
  padding: 6px 0;
  transition: color var(--transition-base);
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--neutral-mid);
  margin-bottom: 12px;
}

.footer-contact-item .icon {
  color: var(--secondary-gold);
  font-size: 16px;
  margin-top: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(100, 116, 139, 0.3);
  margin-top: 48px;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--neutral-mid);
}

@media (max-width: 360px) {
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* --- Banner / Hero --- */
.hero {
  position: relative;
  min-height: 600px;
  background: var(--primary);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255, 193, 7, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(25, 118, 210, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 193, 7, 0.15);
  border: 1px solid rgba(255, 193, 7, 0.3);
  color: var(--secondary-gold);
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  color: var(--white);
  font-size: 48px;
  font-weight: 700;
  letter-spacing: var(--letter-spacing-title);
  line-height: 1.2;
  margin-bottom: 20px;
}

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

.hero-desc {
  color: rgba(248, 250, 252, 0.7);
  font-size: 18px;
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: 36px;
}

@media (max-width: 768px) {
  .hero {
    min-height: 480px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-desc {
    font-size: 16px;
  }
}

@media (max-width: 360px) {
  .hero {
    min-height: 400px;
  }
  .hero-title {
    font-size: 28px;
  }
}

/* --- 区块标题 --- */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(25, 118, 210, 0.1);
  color: var(--tech-blue);
  padding: 6px 16px;
  border-radius: var(--radius-btn);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  color: var(--primary);
  letter-spacing: var(--letter-spacing-title);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--neutral-mid);
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .section-title {
    font-size: 26px;
  }
}

/* --- 滚动渐入动画 --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

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

.fade-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.fade-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.fade-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* --- 产品网格 --- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 360px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

.product-card-img {
  width: 100%;
  height: 220px;
  background: var(--neutral-light);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.product-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 32, 54, 0.04) 0%, transparent 60%);
}

.product-card-img .placeholder {
  color: var(--neutral-mid);
  font-size: 48px;
}

.product-card-category {
  display: inline-block;
  background: rgba(255, 193, 7, 0.15);
  color: var(--secondary-gold-dark);
  padding: 4px 12px;
  border-radius: 2px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
}

.product-card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: var(--letter-spacing-title);
}

.product-card-desc {
  font-size: 14px;
  color: var(--neutral-mid);
  line-height: 1.6;
  margin-bottom: 16px;
}

.product-card-specs {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.product-card-spec {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--neutral-mid);
}

.product-card-spec .icon {
  color: var(--tech-blue);
  font-size: 14px;
}

/* --- 优势图标块 --- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 360px) {
  .advantage-grid {
    grid-template-columns: 1fr;
  }
}

.advantage-item {
  text-align: center;
  padding: 32px 24px;
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(25, 118, 210, 0.08);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech-blue);
  font-size: 28px;
  transition: background var(--transition-base), transform var(--transition-base);
}

.advantage-item:hover .advantage-icon {
  background: rgba(255, 193, 7, 0.15);
  color: var(--secondary-gold-dark);
  transform: scale(1.05);
}

.advantage-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
  letter-spacing: var(--letter-spacing-title);
}

.advantage-desc {
  font-size: 14px;
  color: var(--neutral-mid);
  line-height: 1.6;
}

/* --- 数据统计 --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

@media (max-width: 768px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

.stat-item {
  text-align: center;
  padding: 24px;
}

.stat-number {
  font-size: 40px;
  font-weight: 700;
  color: var(--secondary-gold);
  letter-spacing: var(--letter-spacing-title);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--neutral-mid);
}

/* --- 新闻列表 --- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .news-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}

.news-card-img {
  width: 100%;
  height: 180px;
  background: var(--neutral-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-mid);
  font-size: 36px;
}

.news-card-date {
  font-size: 13px;
  color: var(--tech-blue);
  margin-bottom: 8px;
}

.news-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: var(--letter-spacing-title);
  transition: color var(--transition-base);
}

.news-card:hover .news-card-title {
  color: var(--tech-blue);
}

.news-card-excerpt {
  font-size: 14px;
  color: var(--neutral-mid);
  line-height: 1.6;
}

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

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 12px 16px;
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  color: var(--neutral-dark);
  background: var(--white);
  border: 1px solid var(--neutral-border);
  border-radius: var(--radius-btn);
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--tech-blue);
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* --- 页面Banner (子页面) --- */
.page-banner {
  background: var(--primary);
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 90% 10%, rgba(255, 193, 7, 0.06) 0%, transparent 40%);
  pointer-events: none;
}

.page-banner-title {
  color: var(--white);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: var(--letter-spacing-title);
  margin-bottom: 12px;
}

.page-banner-desc {
  color: rgba(248, 250, 252, 0.6);
  font-size: 16px;
}

@media (max-width: 768px) {
  .page-banner {
    padding: 96px 0 64px;
  }
  .page-banner-title {
    font-size: 26px;
  }
}

/* --- 分页 --- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 48px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  color: var(--neutral-mid);
  background: var(--white);
  border: 1px solid var(--neutral-border);
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.pagination a:hover {
  border-color: var(--tech-blue);
  color: var(--tech-blue);
}

.pagination .active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* --- 标签筛选 --- */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-tag {
  padding: 8px 20px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 500;
  color: var(--neutral-mid);
  background: var(--white);
  border: 1px solid var(--neutral-border);
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

/* --- 面包屑 --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--neutral-mid);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--neutral-mid);
  transition: color var(--transition-base);
}

.breadcrumb a:hover {
  color: var(--tech-blue);
}

.breadcrumb .sep {
  color: var(--neutral-border);
}

.breadcrumb .current {
  color: var(--primary);
  font-weight: 600;
}

/* --- 时间线 --- */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--neutral-border);
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--secondary-gold);
  border: 2px solid var(--white);
}

.timeline-year {
  font-size: 14px;
  font-weight: 600;
  color: var(--secondary-gold);
  margin-bottom: 8px;
}

.timeline-text {
  font-size: 14px;
  color: var(--neutral-mid);
  line-height: 1.6;
}

/* --- 质检流程网格 --- */
.qc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .qc-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
}

@media (max-width: 360px) {
  .qc-grid {
    grid-template-columns: 1fr;
  }
}

/* --- 工厂图片网格 --- */
.factory-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

@media (max-width: 360px) {
  .factory-grid {
    grid-template-columns: 1fr;
  }
}

.factory-img {
  width: 100%;
  height: 240px;
  background: var(--neutral-light);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-mid);
  font-size: 36px;
  box-shadow: var(--shadow-card);
}

/* --- 联系信息卡 --- */
.contact-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(25, 118, 210, 0.08);
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech-blue);
  font-size: 22px;
  margin-bottom: 16px;
}

/* --- 客户logo --- */
.client-logo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 768px) {
  .client-logo-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.client-logo-item {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
  box-shadow: var(--shadow-card);
  color: var(--neutral-mid);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: transform var(--transition-base);
}

.client-logo-item:hover {
  transform: translateY(-2px);
}

/* --- 产品详情规格表 --- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table th,
.spec-table td {
  padding: 12px 16px;
  font-size: 14px;
  text-align: left;
  border-bottom: 1px solid var(--neutral-border);
}

.spec-table th {
  background: var(--neutral-light);
  color: var(--primary);
  font-weight: 600;
  width: 140px;
}

.spec-table td {
  color: var(--neutral-dark);
}

/* --- 轮播指示器 --- */
.carousel-indicators {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.carousel-dot {
  width: 10px;
  height: 3px;
  border-radius: 2px;
  background: rgba(248, 250, 252, 0.4);
  cursor: pointer;
  transition: width var(--transition-base), background var(--transition-base);
}

.carousel-dot.active {
  width: 32px;
  background: var(--secondary-gold);
}

/* --- 标签页 --- */
.tab-bar {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--neutral-border);
  margin-bottom: 32px;
}

.tab-item {
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--neutral-mid);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color var(--transition-base), border-color var(--transition-base);
}

.tab-item:hover,
.tab-item.active {
  color: var(--primary);
  border-bottom-color: var(--secondary-gold);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* --- 回到顶部 --- */
.back-top {
  position: fixed;
  right: 16px;
  bottom: 48px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-btn);
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: 998;
}

.back-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-top:hover {
  background: var(--primary-light);
}

@media (max-width: 360px) {
  .float-service {
    right: 8px;
    bottom: 80px;
  }
  .float-item {
    width: 40px;
    height: 40px;
    font-size: 18px;
  }
  .back-top {
    right: 8px;
    bottom: 40px;
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
}

/* --- 响应式辅助 (内联grid布局移动端折叠) --- */
@media (max-width: 768px) {
  .grid-responsive {
    grid-template-columns: 1fr !important;
    gap: 32px !important;
  }
  .grid-2-responsive {
    grid-template-columns: 1fr !important;
  }
  .grid-3-responsive {
    grid-template-columns: 1fr !important;
  }
  .grid-4-responsive {
    grid-template-columns: 1fr 1fr !important;
  }
}