/* ===== 蓝色科技 - 企业官网样式 ===== */

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

:root {
  --primary: #0d6efd;
  --primary-dark: #0a58ca;
  --primary-light: #e8f0fe;
  --secondary: #198754;
  --dark: #1a1d2e;
  --dark-lighter: #2a2d3e;
  --text-primary: #212529;
  --text-secondary: #6c757d;
  --text-light: #adb5bd;
  --border-color: #dee2e6;
  --bg-light: #f8f9fa;
  --bg-white: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
  list-style: none;
}

/* ===== Header / Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #4dabf7);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-size: 18px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-subtitle {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

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

.nav a {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
}

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

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

.nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
}

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

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

/* ===== Hero Section (Home) ===== */
.hero {
  position: relative;
  min-height: 520px;
  margin-top: 70px;
  background: linear-gradient(135deg, #0a2540 0%, #1a4a7a 50%, #0d6efd 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(13,110,253,0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(77,171,247,0.2) 0%, transparent 40%);
}

.hero-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image:
    repeating-linear-gradient(45deg, transparent, transparent 35px, rgba(255,255,255,0.1) 35px, rgba(255,255,255,0.1) 70px);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}

.hero-content {
  max-width: 600px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 20px;
  color: rgba(255,255,255,0.9);
  font-size: 13px;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: 42px;
  font-weight: 800;
  color: white;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero p {
  font-size: 17px;
  color: rgba(255,255,255,0.85);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 500px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.btn-outline {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.5);
}

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

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

.btn-blue:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(13,110,253,0.4);
}

/* ===== Page Banner (Inner Pages) ===== */
.page-banner {
  position: relative;
  margin-top: 70px;
  padding: 80px 24px;
  background: linear-gradient(135deg, #0a4a8a 0%, #0d6efd 60%, #4dabf7 100%);
  text-align: center;
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 40%, rgba(255,255,255,0.08) 0%, transparent 50%),
    radial-gradient(circle at 70% 60%, rgba(77,171,247,0.15) 0%, transparent 40%);
}

.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 50px, rgba(255,255,255,0.1) 50px, rgba(255,255,255,0.1) 51px),
    repeating-linear-gradient(90deg, transparent, transparent 50px, rgba(255,255,255,0.1) 50px, rgba(255,255,255,0.1) 51px);
}

.page-banner-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-banner h1 {
  font-size: 38px;
  font-weight: 700;
  color: white;
  margin-bottom: 10px;
}

.page-banner .subtitle {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  letter-spacing: 1px;
}

/* ===== Sections Common ===== */
.section {
  padding: 80px 24px;
}

.section-light {
  background: var(--bg-light);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Core Advantages (Home) ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-white);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

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

.advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: var(--primary);
}

.advantage-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.advantage-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== About Preview (Home) ===== */
.about-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-preview-text h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.about-preview-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
  font-size: 15px;
}

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

.about-preview-image img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

/* ===== Solution Cards / Product Cards ===== */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.cards-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

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

.card-image {
  position: relative;
  overflow: hidden;
  height: 200px;
  background: linear-gradient(135deg, #e8f0fe, #c5d9f5);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  background: var(--primary);
  color: white;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}

.card-body {
  padding: 22px;
}

.card-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-link {
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-link:hover {
  gap: 8px;
}

/* Product card with price */
.product-price {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 8px;
}

/* ===== News Cards ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

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

.news-card .card-image {
  height: 180px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 10px;
  font-size: 13px;
  color: var(--text-light);
}

.news-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.news-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== Section CTA ===== */
.section-cta {
  text-align: center;
  margin-top: 40px;
}

/* ===== About Page Specific ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-intro-text h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
}

.about-intro-text p {
  color: var(--text-secondary);
  line-height: 1.9;
  font-size: 15px;
  margin-bottom: 14px;
}

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

.about-intro-img img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

/* Enterprise advantages */
.advantages-grid-8 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-item {
  background: var(--bg-white);
  padding: 32px 20px;
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.advantage-item .icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
}

.advantage-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

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

.honor-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.honor-card .card-image {
  height: 180px;
  background: linear-gradient(135deg, #f8f9fa, #e9ecef);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: var(--text-light);
}

.honor-card .card-body {
  padding: 16px;
  text-align: center;
}

.honor-card .card-body h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

/* ===== Products Page ===== */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: var(--bg-white);
  color: var(--text-secondary);
  transition: var(--transition);
}

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

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

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

.product-card .card-image {
  height: 180px;
}

.product-card .card-body {
  padding: 20px;
}

.product-card .card-body h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.product-card .card-body p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== News Page ===== */
.news-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-list .news-card .card-body {
  padding: 20px;
}

/* ===== Contact Page ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--border-color);
}

.contact-info h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 28px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--primary-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
}

.contact-item-text h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item-text p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.contact-map {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  font-size: 15px;
  margin-top: 24px;
  border: 1px dashed var(--border-color);
}

/* Contact Form */
.contact-form-wrap {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 36px;
  border: 1px solid var(--border-color);
}

.contact-form-wrap h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-form-wrap > p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
  background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(13,110,253,0.1);
}

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

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

.btn-submit {
  width: 100%;
  padding: 14px;
  font-size: 16px;
  margin-top: 8px;
}

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 56px 24px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 16px;
}

.footer-brand .logo .logo-title {
  color: white;
}

.footer-brand .logo .logo-subtitle {
  color: rgba(255,255,255,0.5);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
  color: rgba(255,255,255,0.6);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 16px;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  color: white;
}

.footer-col h4 {
  color: white;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: white;
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 14px;
}

.footer-contact-item .icon {
  color: var(--primary);
  font-size: 16px;
  min-width: 20px;
  margin-top: 2px;
}

.footer-bottom {
  max-width: var(--max-width);
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: rgba(255,255,255,0.4);
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid, .news-list { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid-8 { grid-template-columns: repeat(2, 1fr); }
  .honors-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: repeat(2, 1fr); }
  .about-preview, .about-intro { grid-template-columns: 1fr; }
  .contact-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .menu-toggle { display: flex; }
  .nav {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 16px; }

  .hero h1 { font-size: 30px; }
  .hero p { font-size: 15px; }
  .page-banner h1 { font-size: 28px; }
  .section { padding: 50px 16px; }
  .section-header h2 { font-size: 26px; }

  .cards-grid-3,
  .cards-grid-4,
  .products-grid,
  .news-grid,
  .news-list,
  .advantages-grid,
  .advantages-grid-8,
  .honors-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .form-row { grid-template-columns: 1fr; }
}