/* ===================================
   上海复汭科技有限公司 - 现代主题样式
   Modern Theme CSS
   =================================== */

/* CSS 变量 */
:root {
  --dark: #050b1a;
  --dark-2: #0d1b2e;
  --dark-3: #132240;
  --dark-4: #1e3356;
  --primary: #1a8cff;
  --primary-light: #4da8ff;
  --primary-dark: #0066cc;
  --accent: #00e5ff;
  --accent-2: #f0b429;
  --text-primary: #f0f4ff;
  --text-secondary: #8ba3c7;
  --text-muted: #5a7a9e;
  --border: rgba(100, 160, 255, 0.15);
  --border-hover: rgba(100, 160, 255, 0.4);
  --glass: rgba(10, 25, 55, 0.6);
  --glass-light: rgba(26, 140, 255, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-blue: 0 8px 40px rgba(26, 140, 255, 0.2);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ===========================
   导航栏
   =========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 80px;
  display: flex;
  align-items: center;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(5, 11, 26, 0.85);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.navbar.scrolled {
  height: 68px;
  background: rgba(5, 11, 26, 0.97);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.navbar-brand img {
  height: 48px;
  width: auto;
  filter: brightness(1.1);
}

.navbar-brand .brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.05em;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 8px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: var(--glass-light);
}

.nav-link.active {
  color: var(--primary-light);
}

.nav-item:hover .nav-link {
  color: var(--primary-light);
}

.nav-item:focus-within .nav-link {
  color: var(--primary-light);
}

/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 160px;
  background: rgba(13, 27, 46, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.nav-item:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-item:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.dropdown-item:hover {
  color: var(--primary-light);
  background: var(--glass-light);
}

/* 导航右侧按钮 */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-contact {
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(26, 140, 255, 0.3);
}

.btn-contact:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(26, 140, 255, 0.5);
  color: white;
}

.nav-link:focus-visible,
.dropdown-item:focus-visible,
.btn-primary:focus-visible,
.btn-outline:focus-visible,
.btn-contact:focus-visible,
.hero-dot:focus-visible,
.back-to-top:focus-visible,
.navbar-toggle:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 2px;
}

/* ===========================
   英雄区域
   =========================== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

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

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}

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

.hero-slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero-slide.active .hero-slide-bg {
  transform: scale(1);
}

.hero-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(5, 11, 26, 0.85) 0%,
    rgba(13, 27, 46, 0.6) 50%,
    rgba(5, 11, 26, 0.7) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 10;
  width: 100%;
}

.hero-content .container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(26, 140, 255, 0.15);
  border: 1px solid rgba(26, 140, 255, 0.3);
  border-radius: 100px;
  font-size: 13px;
  color: var(--primary-light);
  letter-spacing: 0.05em;
  animation: fadeInUp 0.8s ease both;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.hero-title {
  font-size: 60px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  animation: fadeInUp 0.8s ease 0.6s both;
}

.btn-primary {
  padding: 14px 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(26, 140, 255, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(26, 140, 255, 0.6);
  color: white;
}

.btn-outline {
  padding: 14px 32px;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-outline:hover {
  background: var(--glass-light);
  border-color: var(--primary);
  color: var(--primary-light);
  transform: translateY(-3px);
}

/* 英雄轮播指示器 */
.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.hero-dot.active {
  width: 28px;
  border-radius: 4px;
  background: var(--primary);
}

/* 英雄滚动提示 */
.hero-scroll {
  position: absolute;
  bottom: 48px;
  right: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 10;
  animation: fadeIn 1.5s ease 1s both;
}

.hero-scroll span {
  font-size: 11px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.hero-scroll .scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--primary), transparent);
  animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* 英雄数据统计 */
.hero-stats {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(13, 27, 46, 0.8);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  z-index: 10;
  padding: 24px 0;
}

.hero-stats .container {
  display: flex;
  justify-content: space-around;
}

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

.stat-number {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===========================
   分区标题
   =========================== */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(26, 140, 255, 0.1);
  border: 1px solid rgba(26, 140, 255, 0.25);
  border-radius: 100px;
  font-size: 12px;
  color: var(--primary-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-title .accent {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ===========================
   服务区域
   =========================== */
.services-section {
  padding: 100px 0;
  background: var(--dark);
  position: relative;
  overflow: hidden;
}

.services-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(ellipse, rgba(26, 140, 255, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

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

.service-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-8px);
  box-shadow: var(--shadow-blue);
  background: rgba(26, 140, 255, 0.06);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(26, 140, 255, 0.15), rgba(0, 229, 255, 0.1));
  border: 1px solid rgba(26, 140, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 28px;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  background: linear-gradient(135deg, rgba(26, 140, 255, 0.25), rgba(0, 229, 255, 0.2));
  transform: scale(1.1) rotate(5deg);
}

.service-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.service-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--primary-light);
  font-weight: 600;
  transition: var(--transition);
}

.service-link:hover {
  gap: 10px;
  color: var(--accent);
}

.service-link .arrow {
  transition: var(--transition);
}

/* ===========================
   关于区域
   =========================== */
.about-section {
  padding: 100px 0;
  background: var(--dark-2);
  position: relative;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image-wrapper {
  position: relative;
}

.about-image-main {
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about-image-main img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  display: block;
}

.about-image-badge {
  position: absolute;
  bottom: -24px;
  right: -24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-blue);
}

.about-image-badge .badge-number {
  font-size: 36px;
  font-weight: 800;
  color: white;
  line-height: 1;
}

.about-image-badge .badge-text {
  font-size: 12px;
  color: rgba(255,255,255,0.8);
  margin-top: 4px;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-content .section-header {
  text-align: left;
  margin-bottom: 0;
}

.about-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.about-feature:hover {
  border-color: var(--border-hover);
  background: var(--glass-light);
}

.about-feature-icon {
  font-size: 20px;
  flex-shrink: 0;
}

.about-feature-text {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ===========================
   产品/设备区域
   =========================== */
.products-section {
  padding: 100px 0;
  background: var(--dark);
}

.products-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  justify-content: center;
}

.tab-btn {
  padding: 10px 24px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.tab-btn.active,
.tab-btn:hover {
  background: linear-gradient(135deg, rgba(26, 140, 255, 0.15), rgba(0, 229, 255, 0.08));
  border-color: var(--primary);
  color: var(--primary-light);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.product-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

.product-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-blue);
}

.product-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-img {
  transform: scale(1.05);
}

.product-info {
  padding: 20px;
}

.product-name {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.product-category {
  font-size: 12px;
  color: var(--primary-light);
  background: rgba(26, 140, 255, 0.1);
  padding: 3px 10px;
  border-radius: 100px;
  display: inline-block;
}

/* ===========================
   数据统计区域
   =========================== */
.stats-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--dark-3), var(--dark-4));
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(26, 140, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.stat-card {
  text-align: center;
  padding: 20px;
}

.stat-card .stat-number {
  font-size: 52px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-card .stat-unit {
  font-size: 20px;
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===========================
   CTA区域
   =========================== */
.cta-section {
  padding: 100px 0;
  background: var(--dark-2);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(26, 140, 255, 0.1) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 50%, rgba(0, 229, 255, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.cta-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
}

/* ===========================
   页脚
   =========================== */
.footer {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 60px;
  padding-bottom: 60px;
}

.footer-brand img {
  height: 44px;
  width: auto;
  margin-bottom: 16px;
  filter: brightness(1.1);
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-contact-item .icon {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 1px;
}

.footer-heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
}

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

.footer-link {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-link:hover {
  color: var(--primary-light);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-divider {
  color: var(--border);
}

/* ===========================
   页面横幅（内页顶部）
   =========================== */
.page-banner {
  height: 360px;
  position: relative;
  display: flex;
  align-items: center;
  margin-top: 80px;
  overflow: hidden;
}

.page-banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.page-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5, 11, 26, 0.9), rgba(13, 27, 46, 0.7));
}

.page-banner-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.page-banner-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(26, 140, 255, 0.15);
  border: 1px solid rgba(26, 140, 255, 0.3);
  border-radius: 100px;
  font-size: 12px;
  color: var(--primary-light);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.page-banner-title {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-banner-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 500px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: var(--transition);
}

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

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

.breadcrumb-current {
  color: var(--primary-light);
}

/* ===========================
   联系页面
   =========================== */
.contact-section {
  padding: 80px 0;
  background: var(--dark);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
}

.contact-info-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-info-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-info-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(26, 140, 255, 0.15), rgba(0, 229, 255, 0.1));
  border: 1px solid rgba(26, 140, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.contact-info-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-info-value {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.6;
}

.contact-form-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

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

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: rgba(13, 27, 46, 0.8);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 140, 255, 0.15);
}

.form-control::placeholder {
  color: var(--text-muted);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.btn-submit {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: inherit;
  box-shadow: 0 4px 20px rgba(26, 140, 255, 0.4);
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(26, 140, 255, 0.6);
}

/* ===========================
   关于页面
   =========================== */
.about-main-section {
  padding: 80px 0;
  background: var(--dark);
}

.about-story-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 80px;
  align-items: start;
  margin-bottom: 80px;
}

.about-story-text h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.about-story-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.about-story-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about-story-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 60px;
}

.value-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  transition: var(--transition);
}

.value-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-blue);
}

.value-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.value-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}

.value-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===========================
   测试服务 / 微纳加工页面
   =========================== */
.service-detail-section {
  padding: 80px 0;
  background: var(--dark);
}

.service-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  margin-bottom: 80px;
}

.service-intro-text h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.service-intro-text p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.service-intro-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.service-intro-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

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

.equipment-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

.equipment-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-blue);
}

.equipment-img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.equipment-card:hover .equipment-img {
  transform: scale(1.05);
}

.equipment-info {
  padding: 24px;
}

.equipment-tag {
  display: inline-block;
  font-size: 11px;
  padding: 3px 10px;
  background: rgba(26, 140, 255, 0.1);
  border: 1px solid rgba(26, 140, 255, 0.2);
  color: var(--primary-light);
  border-radius: 100px;
  margin-bottom: 10px;
}

.equipment-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.equipment-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===========================
   动画
   =========================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 滚动动画 - 用JS触发 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }

/* ===========================
   回到顶部按钮
   =========================== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 500;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(26, 140, 255, 0.4);
  border: none;
  font-size: 20px;
  line-height: 1;
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(26, 140, 255, 0.6);
}

/* ===========================
   装饰性元素
   =========================== */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(26, 140, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26, 140, 255, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.dot-pattern {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(26, 140, 255, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

/* ===========================
   分隔线
   =========================== */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0;
}

/* 图标字体替代（使用 emoji 或 unicode） */
.icon-arrow-right::after { content: '→'; }
.icon-check::before { content: '✓'; }

/* ===========================
   汉堡菜单按钮
   =========================== */
.navbar-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 1001;
}

.navbar-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

.navbar-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.navbar-toggle.open span:nth-child(2) {
  opacity: 0;
}
.navbar-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===========================
   移动端响应式
   =========================== */
@media (max-width: 900px) {
  body {
    min-width: unset;
  }

  .container {
    padding: 0 20px;
  }

  /* 导航 */
  .navbar-toggle {
    display: flex;
  }

  .navbar-nav {
    display: none;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: rgba(5, 11, 26, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 20px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
    gap: 4px;
  }

  .navbar-nav.open {
    display: flex;
  }

  .navbar-actions {
    display: none;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: transparent;
    border: none;
    box-shadow: none;
    padding: 4px 0 4px 16px;
  }

  .nav-item:hover .dropdown-menu {
    transform: none;
  }

  /* 英雄区域 */
  .hero-title {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

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

  .hero-scroll {
    display: none;
  }

  /* 页面横幅 */
  .page-banner-title {
    font-size: 32px;
  }

  /* 各页面网格 */
  .services-grid {
    grid-template-columns: 1fr;
  }

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

  .about-image-wrapper {
    order: -1;
  }

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

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

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

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

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

  .about-story-grid {
    grid-template-columns: 1fr;
  }

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

  /* 特色栏 */
  .features-bar-inner {
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
  }

  .feature-bar-sep {
    display: none;
  }

  /* 流程步骤 */
  .process-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .process-steps::before {
    display: none;
  }

  /* 时间线 */
  .timeline::before {
    left: 16px;
  }

  .timeline-item {
    padding-right: 0;
    padding-left: 48px;
    justify-content: flex-start;
  }

  .timeline-item:nth-child(even) {
    padding-left: 48px;
    padding-right: 0;
  }

  .timeline-dot {
    left: 16px;
  }

  .timeline-card {
    max-width: 100%;
  }

  /* 能力网格 */
  .capabilities-grid {
    grid-template-columns: 1fr;
  }

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

  /* 表单 */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* 合作院校 */
  .partners-logos {
    gap: 24px;
  }

  /* CTA */
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  /* 回到顶部 */
  .back-to-top {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 22px;
  }

  .page-banner-title {
    font-size: 26px;
  }

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

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

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

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

  .capability-card {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}