/* ========================================
   温州事成网络科技有限公司 - 官网样式
   ======================================== */

/* CSS Variables */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary: #10b981;
  --accent: #f59e0b;
  --text-dark: #1f2937;
  --text-light: #6b7280;
  --text-white: #ffffff;
  --bg-light: #f9fafb;
  --bg-white: #ffffff;
  --border-color: #e5e7eb;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

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

ul {
  list-style: none;
}

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

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

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

.btn-white:hover {
  background: var(--bg-light);
  transform: translateY(-2px);
}

/* Section Title */
.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 16px;
}

.section-title p {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--bg-white);
  box-shadow: var(--shadow);
  z-index: 1000;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

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

.logo-icon {
  width: 45px;
  height: 45px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 20px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
}

.nav-menu {
  display: flex;
  gap: 40px;
}

.nav-menu a {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-dark);
  position: relative;
}

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

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
  width: 100%;
}

.nav-contact .btn {
  padding: 10px 24px;
}

/* Mobile Menu */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-menu-btn span {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  padding: 160px 0 100px;
  background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

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

.hero-content h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-dark);
  margin-bottom: 24px;
}

.hero-content h1 span {
  color: var(--primary);
}

.hero-content p {
  font-size: 20px;
  color: var(--text-light);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 16px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.hero-stats .stat {
  text-align: center;
}

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

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

.hero-image {
  position: relative;
}

.hero-image-main {
  width: 100%;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 120px;
}

/* ========================================
   About Section
   ======================================== */
.about {
  padding: 100px 0;
  background: var(--bg-white);
}

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

.about-image {
  position: relative;
}

.about-image-main {
  width: 100%;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--secondary), var(--primary));
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 100px;
}

.about-content h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 24px;
}

.about-content > p {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 30px;
  line-height: 1.8;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.about-feature-icon {
  width: 24px;
  height: 24px;
  background: var(--secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 2px;
}

.about-feature span {
  font-size: 16px;
  color: var(--text-dark);
}

/* ========================================
   Services Section
   ======================================== */
.services {
  padding: 100px 0;
  background: var(--bg-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.service-card {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary), #60a5fa);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 36px;
  color: white;
}

.service-card h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-dark);
}

.service-card p {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ========================================
   Cases Section
   ======================================== */
.cases {
  padding: 100px 0;
  background: var(--bg-white);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.case-card {
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-white);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.case-image {
  width: 100%;
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: white;
}

.case-content {
  padding: 24px;
}

.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 12px;
}

.case-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.case-content p {
  font-size: 15px;
  color: var(--text-light);
}

/* ========================================
   Stats Section
   ======================================== */
.stats {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--text-white);
}

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

.stat-item .stat-number {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-item .stat-label {
  font-size: 16px;
  opacity: 0.9;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
  padding: 100px 0;
  background: var(--bg-light);
}

.cta-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.cta-content p {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 40px;
}

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

/* ========================================
   Contact Section
   ======================================== */
.contact {
  padding: 100px 0;
  background: var(--bg-white);
}

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

.contact-info h3 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 24px;
}

.contact-info > p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 40px;
  line-height: 1.8;
}

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

.contact-item-icon {
  width: 50px;
  height: 50px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  flex-shrink: 0;
}

.contact-item-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item-content p {
  font-size: 15px;
  color: var(--text-light);
}

.contact-form {
  background: var(--bg-light);
  padding: 40px;
  border-radius: 20px;
}

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

.form-group label {
  display: block;
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 16px;
  font-family: inherit;
  transition: var(--transition);
  background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.contact-form .btn {
  width: 100%;
  padding: 16px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--text-dark);
  color: var(--text-white);
  padding: 60px 0 30px;
}

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

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand .logo-text {
  color: var(--text-white);
}

.footer-brand p {
  font-size: 15px;
  color: #9ca3af;
  line-height: 1.8;
  margin-bottom: 24px;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: var(--transition);
}

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

.footer-links h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 24px;
}

.footer-links ul li {
  margin-bottom: 12px;
}

.footer-links ul li a {
  font-size: 15px;
  color: #9ca3af;
}

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 14px;
  color: #9ca3af;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  font-size: 14px;
  color: #9ca3af;
}

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

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-content h1 {
    font-size: 40px;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-stats {
    justify-content: center;
  }
  
  .hero-image {
    max-width: 500px;
    margin: 0 auto;
  }
  
  .about .container {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    max-width: 500px;
    margin: 0 auto;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu,
  .nav-contact {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .hero {
    padding: 120px 0 60px;
  }
  
  .hero-content h1 {
    font-size: 32px;
  }
  
  .hero-content p {
    font-size: 16px;
  }
  
  .hero-stats {
    flex-wrap: wrap;
    gap: 30px;
  }
  
  .section-title h2 {
    font-size: 28px;
  }
  
  .services-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
  
  .stat-item .stat-number {
    font-size: 36px;
  }
  
  .cta-content h2 {
    font-size: 28px;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand .logo {
    justify-content: center;
  }
  
  .footer-social {
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-content h1 {
    font-size: 28px;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: 24px;
  }
}