/* ========================================
   上海睿理德自动化设备有限公司 - 官网样式
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
  /* 主色调 - 科技蓝 */
  --color-primary: #1a5fb4;
  --color-primary-dark: #0d3d7a;
  --color-primary-light: #4a9eff;
  --color-accent: #00d9ff;

  /* 中性色 */
  --color-dark: #0f172a;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-text-lighter: #94a3b8;
  --color-border: #e2e8f0;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 40px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);

  /* 过渡 */
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* 容器宽度 */
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

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

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

/* ===== 顶部通知栏 ===== */
.top-bar {
  background: var(--color-bg-dark);
  color: #94a3b8;
  font-size: 13px;
  padding: 8px 0;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.top-bar-text {
  letter-spacing: 0.5px;
}

.top-bar-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.top-bar-link {
  color: #94a3b8;
  transition: color var(--transition);
}

.top-bar-link:hover {
  color: #ffffff;
}

.divider {
  color: #475569;
}

/* ===== 导航栏 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

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

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text {
  font-size: 24px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 2px;
}

.logo-sub {
  font-size: 10px;
  color: var(--color-text-lighter);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-link {
  display: block;
  padding: 10px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background: rgba(26, 95, 180, 0.06);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero 轮播 ===== */
.hero {
  position: relative;
  height: 680px;
  overflow: hidden;
  background: var(--color-bg-dark);
}

.hero-carousel {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.hero-slide.active {
  opacity: 1;
  visibility: visible;
}

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

.hero-slide-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
}

.hero-slide-pattern::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 50px 50px;
}

.hero-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.hero-text {
  max-width: 440px;
  animation: fadeInUp 0.8s ease;
}

.hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: 2px;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 32px;
}

.hero-visual {
  flex-shrink: 0;
  animation: fadeIn 1s ease 0.2s both;
}

.hero-icon-wrapper {
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  backdrop-filter: blur(10px);
}

.hero-icon {
  width: 200px;
  height: 200px;
}

/* 产品图片在轮播中 */
.hero-product-img {
  max-width: 560px;
  max-height: 520px;
  width: auto;
  height: auto;
  object-fit: contain;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition);
}

.hero-visual-link {
  display: block;
  cursor: pointer;
}

.hero-visual-link:hover .hero-product-img {
  transform: scale(1.05);
}

/* 轮播箭头 */
.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.carousel-arrow:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

.carousel-prev {
  left: 24px;
}

.carousel-next {
  right: 24px;
}

/* 轮播指示器 */
.carousel-dots {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 10px;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: all var(--transition);
  padding: 0;
}

.carousel-dot.active {
  width: 36px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.9);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(26, 95, 180, 0.3);
}

.btn-outline {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.4);
}

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

.btn-lg {
  padding: 16px 36px;
  font-size: 16px;
}

/* ===== 快速支持入口 ===== */
.quick-support {
  padding: var(--spacing-xl) 0;
  background: var(--color-bg-alt);
}

.quick-support-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
}

.quick-support-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 20px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.quick-support-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.qs-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 95, 180, 0.08);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  margin-bottom: 16px;
  transition: all var(--transition);
}

.quick-support-card:hover .qs-icon {
  background: var(--color-primary);
  color: #ffffff;
}

.qs-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.qs-desc {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.qs-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== 通用 Section ===== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--spacing-2xl);
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 产品网格 ===== */
.products {
  background: var(--color-bg);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

.product-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.product-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
}

.product-card-top {
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-card-top::before {
  content: "";
  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: 24px 24px;
}

.product-card-icon {
  position: relative;
  z-index: 1;
  width: 100px;
  height: 100px;
}

.product-card-icon svg {
  width: 100%;
  height: 100%;
}

/* 产品卡片中的真实图片 */
.product-card-img {
  max-width: 150px;
  max-height: 140px;
  width: auto;
  height: auto;
  object-fit: contain;
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 12px;
  padding: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* 样册链接按钮 */
.product-catalog-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(26, 95, 180, 0.08);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  text-decoration: none;
}

.product-catalog-link:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-2px);
}

.product-catalog-link svg {
  width: 14px;
  height: 14px;
}

.product-card-body {
  padding: 24px;
}

.product-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.product-series {
  font-size: 13px;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.product-features {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-features li {
  font-size: 14px;
  color: var(--color-text-light);
  padding-left: 16px;
  position: relative;
}

.product-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
}

/* ===== 行业应用 ===== */
.industries {
  background: var(--color-bg-alt);
}

.industries-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
}

.industry-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 16px 24px;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.industry-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.industry-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 95, 180, 0.08);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  margin-bottom: 16px;
  transition: all var(--transition);
}

.industry-icon svg {
  width: 32px;
  height: 32px;
}

.industry-card:hover .industry-icon {
  background: var(--color-primary);
  color: #ffffff;
}

.industry-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 8px;
  line-height: 1.4;
}

.industry-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== 更多CKD产品系列 ===== */
.more-products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}
.more-product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.more-product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}
.mp-name {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--color-dark);
}
.mp-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  margin: 0 0 14px;
  flex: 1;
}
.mp-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== 服务的客户 ===== */
.clients {
  background: var(--color-bg-alt);
}
.clients-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
}
.client-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 96px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.client-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}
.client-name {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.5px;
}
.client-en {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-text-light);
}
@media (max-width: 768px) {
  .clients-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .clients-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-sm); }
  .client-name { font-size: 17px; }
}

/* ===== 技术知识 FAQ ===== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}
.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: box-shadow var(--transition);
}
.faq-item:hover {
  box-shadow: var(--shadow-md);
}
.faq-q {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 12px;
}
.faq-a p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin: 0;
}
.faq-a a {
  color: var(--color-primary);
  text-decoration: underline;
}
@media (max-width: 768px) {
  .more-products-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .more-products-grid { grid-template-columns: 1fr; }
}

/* ===== 关于我们 ===== */
.about {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

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

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.about-stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-light);
  margin-top: 4px;
}

.about-card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.about-card-header {
  padding: 24px 32px;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
}

.about-card-header h3 {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
}

.advantage-list {
  padding: 24px 32px;
}

.advantage-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.advantage-list li:last-child {
  border-bottom: none;
}

.adv-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(26, 95, 180, 0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.advantage-list strong {
  display: block;
  font-size: 15px;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.advantage-list p {
  font-size: 13px;
  color: var(--color-text-light);
}

/* ===== 联系我们 ===== */
.contact {
  background: var(--color-bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(26, 95, 180, 0.08);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-label {
  font-size: 13px;
  color: var(--color-text-lighter);
  margin-bottom: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  display: block;
  margin-bottom: 2px;
}

.contact-note {
  font-size: 14px;
  color: var(--color-text-light);
}

.cta-card {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  border-radius: var(--radius-xl);
  padding: 40px;
  color: #ffffff;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.cta-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.cta-text {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.cta-buttons .btn-primary {
  background: #ffffff;
  color: var(--color-primary);
}

.cta-buttons .btn-primary:hover {
  background: rgba(255, 255, 255, 0.9);
}

.cta-hours {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.cta-hours p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 4px;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--color-bg-dark);
  color: #94a3b8;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 2px;
  margin-bottom: 4px;
}

.footer-brand-sub {
  font-size: 11px;
  color: #64748b;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #64748b;
}

.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
}

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

.footer-links a,
.footer-links li {
  font-size: 14px;
  color: #94a3b8;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid #1e293b;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #64748b;
}

.visitor-count {
  margin-top: 6px !important;
}

.visitor-count span {
  color: var(--color-primary-light);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
}

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

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-4px);
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ===== 响应式 - 平板 ===== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 42px;
  }

  .hero-icon-wrapper {
    width: 240px;
    height: 240px;
  }

  .hero-icon {
    width: 150px;
    height: 150px;
  }

  .quick-support-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .industries-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .section-title {
    font-size: 32px;
  }

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

/* ===== 响应式 - 手机 ===== */
@media (max-width: 768px) {
  /* 导航栏 */
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    height: calc(100vh - 72px);
    background: #ffffff;
    transform: translateX(100%);
    transition: transform var(--transition);
    overflow-y: auto;
    padding: 24px;
  }

  .nav.active {
    transform: translateX(0);
  }

  .nav-list {
    flex-direction: column;
    gap: 4px;
  }

  .nav-link {
    padding: 14px 20px;
    font-size: 16px;
    border-radius: var(--radius-md);
  }

  .nav-link.active::after {
    display: none;
  }

  /* Hero */
  .hero {
    height: auto;
    min-height: 520px;
    padding: 40px 0;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: 24px;
    padding-top: 40px;
    padding-bottom: 60px;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-product-img {
    max-width: 300px;
    max-height: 300px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-visual {
    order: -1;
  }

  .hero-icon-wrapper {
    width: 180px;
    height: 180px;
  }

  .hero-icon {
    width: 120px;
    height: 120px;
  }

  .carousel-arrow {
    width: 36px;
    height: 36px;
  }

  .carousel-prev {
    left: 12px;
  }

  .carousel-next {
    right: 12px;
  }

  /* 快速支持 */
  .quick-support-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .quick-support-card {
    flex-direction: row;
    text-align: left;
    padding: 20px;
    align-items: center;
    gap: 16px;
  }

  .qs-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .qs-title {
    font-size: 16px;
    margin-bottom: 2px;
  }

  .qs-desc {
    font-size: 13px;
    margin-bottom: 0;
  }

  .qs-link {
    margin-left: auto;
    flex-shrink: 0;
  }

  /* 产品 */
  .products-grid {
    grid-template-columns: 1fr;
  }

  /* 行业应用 */
  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 关于 */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-stats {
    gap: 24px;
  }

  /* 联系 */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  /* Section */
  .section {
    padding: var(--spacing-2xl) 0;
  }

  .section-title {
    font-size: 28px;
  }

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

  .footer-brand {
    max-width: 100%;
  }

  /* 返回顶部 */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }

  /* 顶部栏 */
  .top-bar-text {
    display: none;
  }

  .top-bar-inner {
    justify-content: center;
  }
}

/* ===== 响应式 - 小手机 ===== */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 24px;
  }

  .hero-product-img {
    max-width: 240px;
    max-height: 240px;
  }

  .industries-grid {
    grid-template-columns: 1fr;
  }

  .cta-card {
    padding: 28px 20px;
  }

  .cta-buttons {
    flex-direction: column;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .about-stats {
    flex-wrap: wrap;
    gap: 20px;
  }

  .stat-num {
    font-size: 28px;
  }
}

/* ===== 联系弹窗（替代跳转到 CKD 官网） ===== */
.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.contact-modal.active {
  display: flex;
}

.contact-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}

.contact-modal-box {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  background: #ffffff;
  border-radius: 24px;
  padding: 44px 32px 32px;
  text-align: center;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.3);
  animation: modalPop 0.3s ease;
}

.contact-modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.05);
  color: #64748b;
  font-size: 22px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.contact-modal-close:hover {
  background: rgba(15, 23, 42, 0.12);
  color: var(--color-dark);
}

.cm-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

.cm-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-dark);
  margin: 0 0 12px;
}

.cm-text {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 24px;
}

.cm-info {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  text-align: left;
}

.cm-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--color-bg-alt);
  border-radius: 12px;
}

.cm-label {
  font-size: 13px;
  color: var(--color-text-lighter);
  font-weight: 600;
  min-width: 44px;
}

.cm-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-dark);
}

.cm-phone,
.cm-email {
  color: var(--color-primary);
}

.cm-actions {
  display: flex;
  gap: 12px;
}

.cm-actions .btn {
  flex: 1;
}

.cm-actions .btn-outline {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.cm-actions .btn-outline:hover {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

@keyframes modalPop {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== 打印样式 ===== */
@media print {
  .top-bar,
  .nav-toggle,
  .carousel-arrow,
  .carousel-dots,
  .back-to-top,
  .quick-support {
    display: none !important;
  }

  .hero {
    height: auto;
    min-height: auto;
  }

  .hero-slide {
    position: static;
    opacity: 1;
    visibility: visible;
    page-break-after: always;
  }

  .hero-slide:not(:first-child) {
    display: none;
  }

  .section {
    padding: 20px 0;
  }
}