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

:root {
  --primary: #1a5fb4;
  --primary-dark: #0d47a1;
  --primary-light: #4a8dd8;
  --secondary: #00c853;
  --background: #f8fafc;
  --surface: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --shadow: rgba(0, 0, 0, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul {
  list-style: none;
}

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

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

/* Header Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  box-shadow: 0 2px 10px var(--shadow);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

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

.logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

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

.nav-links a {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 8px 0;
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-contact {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
}

.nav-phone svg {
  width: 18px;
  height: 18px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 10px 24px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* Hero Section */
.hero {
  margin-top: 80px;
  min-height: calc(100vh - 80px);
  background: linear-gradient(135deg, rgba(26, 95, 180, 0.9), rgba(13, 71, 161, 0.95)), 
              url("../images/hero-banner.jpg") center/cover no-repeat;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: white;
  padding: 40px 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 14px;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
  font-size: 18px;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

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

.btn-hero {
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-hero.primary {
  background: white;
  color: var(--primary);
  border: none;
}

.btn-hero.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

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

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

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

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

.stat-number {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  opacity: 0.8;
}

/* Section Styles */
.section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  background: rgba(26, 95, 180, 0.1);
  color: var(--primary);
  padding: 16px 24px;
  border-radius: 50px;
  font-size: 36px;
  font-weight: 600;
  margin-bottom: 16px;
}

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

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

/* About Section */
.about {
  background: var(--surface);
}

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

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

.about-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 24px;
}

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

.about-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--background);
  border-radius: 8px;
}

.about-feature svg {
  width: 24px;
  height: 24px;
  color: var(--secondary);
  flex-shrink: 0;
}

.about-feature span {
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 500;
}

.about-image {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.about-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.about-image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(26, 95, 180, 0.9));
  padding: 30px;
  color: white;
}

.about-image-overlay h4 {
  font-size: 20px;
  margin-bottom: 8px;
}

.about-image-overlay p {
  font-size: 14px;
  opacity: 0.9;
}

/* Services Section */
.services {
  background: var(--background);
}

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

.service-card {
  background: var(--surface);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.service-image {
  height: 200px;
  overflow: hidden;
}

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

.service-card:hover .service-image img {
  transform: scale(1.1);
}

.service-content {
  padding: 28px;
}

.service-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: rgba(26, 95, 180, 0.1);
  color: var(--primary);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-content h3 {
  font-size: 20px;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.service-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  margin-top: 16px;
  transition: gap 0.3s ease;
}

.service-link:hover {
  gap: 12px;
}

.service-link svg {
  width: 16px;
  height: 16px;
}

/* Company About Section */
.company {
  background: var(--surface);
}

.company-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.company-image {
  position: relative;
}

.company-image img {
  width: 100%;
  height: 500px;
  object-fit: cover;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.company-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--primary);
  color: white;
  padding: 20px 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(26, 95, 180, 0.3);
}

.company-badge h4 {
  font-size: 28px;
  margin-bottom: 4px;
}

.company-badge span {
  font-size: 13px;
  opacity: 0.9;
}

.company-text h3 {
  font-size: 32px;
  color: var(--text-primary);
  margin-bottom: 24px;
  line-height: 1.4;
}

.company-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 20px;
}

.company-highlight {
  background: var(--background);
  padding: 24px;
  border-radius: 12px;
  border-left: 4px solid var(--primary);
  margin: 30px 0;
}

.company-highlight p {
  margin-bottom: 0;
  font-style: italic;
}

/* Advantages Section */
.advantages {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
}

.advantages .section-tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
}

.advantages .section-title {
  color: white;
}

.advantages .section-desc {
  color: rgba(255, 255, 255, 0.8);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.advantage-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  padding: 30px 24px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.advantage-card:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-5px);
}

.advantage-icon {
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.advantage-icon svg {
  width: 28px;
  height: 28px;
}

.advantage-card h4 {
  font-size: 16px;
  margin-bottom: 12px;
}

.advantage-card p {
  font-size: 13px;
  opacity: 0.85;
  line-height: 1.7;
}

/* Process Section */
.process {
  background: var(--background);
}

.process-timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  position: relative;
}

.process-timeline::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 60px;
  right: 60px;
  height: 3px;
  background: var(--border);
}

.process-step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 80px;
  height: 80px;
  background: var(--surface);
  border: 3px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  transition: all 0.3s ease;
}

.process-step:hover .step-number {
  background: var(--primary);
  color: white;
}

.process-step h4 {
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.process-step p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 0 10px;
}

/* Values Section */
.values {
  background: var(--surface);
  text-align: center;
}

.values-content {
  max-width: 900px;
  margin: 0 auto;
}

.values-main {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  letter-spacing: 4px;
}

.values-sub {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 2;
}

.values-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 50px;
}

.value-card {
  background: var(--background);
  padding: 40px 30px;
  border-radius: 16px;
  transition: all 0.3s ease;
}

.value-card:hover {
  background: var(--primary);
  color: white;
}

.value-card:hover p {
  color: rgba(255, 255, 255, 0.9);
}

.value-card h4 {
  font-size: 18px;
  margin-bottom: 12px;
}

.value-card p {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

/* Contact Section */
.contact {
  background: var(--background);
}

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

.contact-info h3 {
  font-size: 28px;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.contact-info > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 30px;
  line-height: 1.8;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--surface);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.contact-item:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(26, 95, 180, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 22px;
  height: 22px;
  color: var(--primary);
}

.contact-item h4 {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
  font-weight: 500;
}

.contact-item p {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 600;
}

.contact-map {
  background: var(--surface);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
  height: 100%;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.map-placeholder {
  text-align: center;
  padding: 40px;
}

.map-placeholder svg {
  width: 80px;
  height: 80px;
  color: var(--primary);
  opacity: 0.5;
  margin-bottom: 20px;
}

.map-placeholder p {
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background: #0f172a;
  color: white;
  padding: 60px 0 30px;
}

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

.footer-brand h3 {
  font-size: 20px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: #94a3b8;
  line-height: 1.8;
  margin-bottom: 20px;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

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

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-links h4 {
  font-size: 16px;
  margin-bottom: 20px;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 14px;
  color: #94a3b8;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: 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: 13px;
  color: #64748b;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(26, 95, 180, 0.4);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
}

.back-to-top svg {
  width: 24px;
  height: 24px;
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  background: var(--surface);
  padding: 20px;
  box-shadow: 0 10px 30px var(--shadow);
  z-index: 999;
  transform: translateY(-100%);
  opacity: 0;
  transition: all 0.3s ease;
}

.mobile-nav.active {
  transform: translateY(0);
  opacity: 1;
}

.mobile-nav a {
  display: block;
  padding: 12px 0;
  font-size: 16px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
  }
  
  .process-timeline::before {
    display: none;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-contact {
    display: none;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .mobile-nav {
    display: block;
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .hero-subtitle {
    font-size: 16px;
  }
  
  .hero-stats {
    flex-direction: column;
    gap: 24px;
  }
  
  .about-content,
  .company-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .company-image img {
    height: 300px;
  }
  
  .company-badge {
    position: static;
    margin-top: 20px;
    display: inline-block;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .process-timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .values-cards {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 28px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 26px;
  }
  
  .hero-buttons {
    flex-direction: column;
  }
  
  .btn-hero {
    width: 100%;
    justify-content: center;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .process-timeline {
    grid-template-columns: 1fr;
  }
  
  .about-features {
    grid-template-columns: 1fr;
  }
}

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

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }