:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #ff6b35;
  --accent-light: #f7931e;
  --bg: #f8f9fa;
  --bg-dark: #0f1419;
  --text: #2c3e50;
  --text-light: #6c757d;
  --white: #ffffff;
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
  font-size: 16px;
}

*, *::before, *::after { 
  box-sizing: border-box; 
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-weight: 400;
}

header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  border-bottom: 3px solid var(--accent);
}

.container {
  width: min(1200px, 95vw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  position: relative;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  text-decoration: none;
  letter-spacing: 2px;
  text-transform: uppercase;
  position: relative;
  padding-left: 3rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.logo::before {
  content: "138";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--white);
  box-shadow: 0 4px 15px rgba(255, 107, 53, 0.4);
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: inline-flex;
  gap: 2rem;
  align-items: center;
}

nav a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  position: relative;
  padding: 0.5rem 0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

nav a:hover,
nav a:focus {
  color: var(--accent);
  text-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
}

nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s ease;
}

nav a:hover::after,
nav a:focus::after {
  transform: scaleX(1);
  transform-origin: left;
}

.icon {
  width: 1.2rem;
  height: 1.2rem;
  fill: currentColor;
  flex-shrink: 0;
}

.btn .icon {
  color: inherit;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-light);
  margin: 0.5rem 0;
  font-size: 1rem;
}

.contact-item a {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-item a:hover {
  color: var(--accent-light);
  text-decoration: underline;
}

main {
  position: relative;
  overflow: hidden;
}

main::before {
  content: "";
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.1), transparent 70%);
  z-index: -1;
}

/* Hero Banner - 全屏背景式 */
.hero-banner {
  position: relative;
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, #0d1521 100%);
  overflow: visible;
  padding: 0;
  padding-bottom: 2rem;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(247, 147, 30, 0.1) 0%, transparent 50%),
    linear-gradient(180deg, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.4) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 8rem 1.5rem 4rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: rgba(255, 107, 53, 0.2);
  border: 2px solid var(--accent);
  border-radius: 50px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
}

.hero-banner h1 {
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--white);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -2px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.8;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.hero-banner .actions {
  justify-content: center;
  margin-top: 2rem;
}

.hero-stats {
  position: relative;
  z-index: 10;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 107, 53, 0.3);
  padding: 2.5rem 0;
  margin-top: auto;
}

.stats-inline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.5rem;
  text-align: center;
  padding: 0 1rem;
}

.stat-item {
  color: var(--white);
  position: relative;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}

.stat-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-3px);
}

.stat-item strong {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 0.75rem;
  text-shadow: 0 2px 10px rgba(255, 107, 53, 0.5);
  line-height: 1.2;
}

.stat-item span {
  display: block;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  letter-spacing: 1px;
  line-height: 1.4;
  white-space: nowrap;
}

/* Hero Features - 产品特色卡片 */
.hero-features {
  padding: 5rem 0 4rem;
  background: var(--bg);
  position: relative;
  margin-top: 0;
  z-index: 1;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: var(--white);
  border-radius: 16px;
  padding: 2.5rem;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  border: 2px solid transparent;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  border-color: var(--accent);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--white);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
  transition: transform 0.4s ease;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 800;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.feature-card p {
  color: var(--text-light);
  line-height: 1.8;
  margin: 0;
}

.actions {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.btn {
  padding: 1rem 2.5rem;
  border-radius: 8px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--white);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

.btn.primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(255, 107, 53, 0.5);
}

.btn.primary::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn.primary:hover::before {
  width: 300px;
  height: 300px;
}

.btn.secondary {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
  position: relative;
  font-weight: 700;
}

.btn.secondary:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(26, 26, 46, 0.3);
}


section {
  padding: 5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, #f8f9fa, #ffffff);
  position: relative;
}

.section-alt::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
}

section h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  text-align: center;
  margin-bottom: 3.5rem;
  color: var(--primary);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.5px;
  position: relative;
  padding-bottom: 1.5rem;
}

section h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 3px;
}

.section-header h2 {
  margin-bottom: 1rem;
  padding-bottom: 1.5rem;
}

.section-header h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 5px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 3px;
}

.grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--white);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.08);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

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

.card:hover::before {
  transform: scaleX(1);
}

figure.card {
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  overflow: hidden;
}

figure.card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

figure.card:hover img {
  transform: scale(1.1);
}

figure.card figcaption {
  padding: 1.5rem;
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.6;
  background: var(--white);
}

.card h3 {
  margin-top: 0;
  color: var(--primary);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.card p {
  margin: 0.5rem 0 0;
  color: var(--text-light);
  line-height: 1.8;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.stat {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 12px;
  padding: 2.5rem 2rem;
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
  border: 2px solid var(--accent);
}

.stat::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.2), transparent);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.stat strong {
  display: block;
  font-size: 3rem;
  color: var(--accent);
  font-weight: 900;
  margin-bottom: 0.5rem;
  position: relative;
  z-index: 1;
}

.stat {
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

.columns {
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.columns-stack {
  display: grid;
  gap: 2rem;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1.5rem;
}

.feature-list li {
  background: var(--white);
  border-radius: 12px;
  padding: 1.8rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
  border-left: 5px solid var(--accent);
  transition: all 0.3s ease;
}

.feature-list li:hover {
  transform: translateX(8px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.feature-list span {
  display: block;
  font-weight: 800;
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

footer {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: rgba(255, 255, 255, 0.85);
  padding: 4rem 0 2rem;
  position: relative;
  border-top: 3px solid var(--accent);
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

footer .footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

footer h3,
footer h4 {
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

footer a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all 0.3s ease;
}

footer a:hover {
  color: var(--accent);
  padding-left: 5px;
}

footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

footer .copyright {
  margin-top: 3rem;
  font-size: 0.9rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem 0;
  }

  nav ul {
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
  }

  .hero-banner {
    min-height: 70vh;
  }

  .hero-content {
    padding: 6rem 1rem 3rem;
  }

  .hero-banner h1 {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .hero-description {
    font-size: 1rem;
  }

  .hero-banner .actions {
    flex-direction: column;
    width: 100%;
    max-width: 400px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-banner {
    padding-bottom: 1rem;
  }

  .hero-stats {
    padding: 2rem 0;
  }

  .stats-inline {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 0 0.5rem;
  }

  .stat-item {
    padding: 0.75rem;
  }

  .stat-item strong {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
  }

  .stat-item span {
    font-size: 0.8rem;
  }

  .hero-features {
    padding: 3rem 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  section {
    padding: 3rem 0;
  }

  section h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
  }

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

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

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

/* Section Header 通用样式 */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  background: rgba(255, 107, 53, 0.1);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  border-radius: 50px;
  margin-bottom: 1rem;
}

.section-intro {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-top: 1rem;
}

/* 产品区域 - 选项卡样式 */
.products-section {
  background: var(--bg);
  padding: 6rem 0;
}

.products-tabs {
  max-width: 1200px;
  margin: 0 auto;
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
  border-bottom: 2px solid rgba(0, 0, 0, 0.1);
  padding-bottom: 1rem;
}

.tab-btn {
  padding: 1rem 2rem;
  background: transparent;
  border: 2px solid transparent;
  border-radius: 8px;
  color: var(--text-light);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.tab-btn:hover {
  color: var(--accent);
  background: rgba(255, 107, 53, 0.1);
}

.tab-btn.active {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.1);
}

.tab-btn.active::after {
  content: "";
  position: absolute;
  bottom: -1.1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 3px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
}

.tab-content {
  position: relative;
  min-height: 400px;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.5s ease;
}

.tab-pane.active {
  display: block;
}

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

.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.product-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
  border: 3px solid var(--accent);
}

.product-image img {
  width: 100%;
  display: block;
  transition: transform 0.5s ease;
}

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

.product-info h3 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
  font-weight: 900;
}

.product-desc {
  font-size: 1.1rem;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 2rem;
}

.product-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.product-features li {
  padding: 1rem;
  background: rgba(255, 107, 53, 0.05);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  font-weight: 600;
  color: var(--primary);
}

/* 解决方案区域 - 时间线样式 */
.solutions-section {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  padding: 6rem 0;
}

.solutions-timeline {
  max-width: 900px;
  margin: 0 auto 4rem;
  position: relative;
  padding-left: 3rem;
}

.solutions-timeline::before {
  content: "";
  position: absolute;
  left: 1.5rem;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), var(--accent-light));
}

.timeline-item {
  position: relative;
  margin-bottom: 3rem;
  padding-left: 4rem;
}

.timeline-icon {
  position: absolute;
  left: -1.5rem;
  top: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
  z-index: 2;
}

.timeline-icon svg {
  width: 30px;
  height: 30px;
  stroke: var(--white);
  fill: none;
}

.timeline-content h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  font-weight: 800;
}

.timeline-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin: 0;
}

.solutions-highlight {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.highlight-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  border-top: 5px solid var(--accent);
  transition: transform 0.3s ease;
}

.highlight-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.15);
}

.highlight-card h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  font-weight: 800;
}

.highlight-card p {
  color: var(--text-light);
  line-height: 1.8;
  margin: 0;
}

/* 服务区域 - 步骤样式 */
.service-section {
  background: var(--bg);
  padding: 6rem 0;
}

.service-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.step-item {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  border: 2px solid transparent;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.step-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.step-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  border-color: var(--accent);
}

.step-item:hover::before {
  transform: scaleX(1);
}

.step-number {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 900;
  color: var(--white);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
  position: relative;
  z-index: 1;
}

.step-item h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  font-weight: 800;
}

.step-item p {
  color: var(--text-light);
  line-height: 1.8;
  margin: 0;
}

/* 案例展示区域 */
.cases-section {
  background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
  padding: 6rem 0;
}

.cases-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.case-card {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  transition: all 0.4s ease;
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.case-image {
  width: 100%;
  height: 250px;
  overflow: hidden;
  position: relative;
}

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

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

.case-content {
  padding: 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-content h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  font-weight: 800;
}

.case-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  flex: 1;
}

.case-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: auto;
}

.case-stats span {
  padding: 0.5rem 1rem;
  background: rgba(255, 107, 53, 0.1);
  color: var(--accent);
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid rgba(255, 107, 53, 0.2);
}

/* 产品展示区域 - 滑块样式 */
.showcase-section {
  background: var(--bg);
  padding: 6rem 0;
}

.showcase-slider {
  max-width: 1200px;
  margin: 0 auto;
}

.showcase-main {
  position: relative;
  width: 100%;
  height: 500px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
  margin-bottom: 2rem;
  background: var(--primary);
}

.showcase-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: var(--white);
  opacity: 0;
  transition: opacity 0.5s ease;
  z-index: 1;
}

.showcase-image.active {
  opacity: 1;
  z-index: 2;
}

.showcase-thumbnails {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.thumb-btn {
  background: var(--white);
  border: 3px solid transparent;
  border-radius: 12px;
  padding: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.thumb-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
  border-color: var(--accent);
}

.thumb-btn.active {
  border-color: var(--accent);
  background: rgba(255, 107, 53, 0.05);
  box-shadow: 0 10px 30px rgba(255, 107, 53, 0.2);
}

.thumb-btn img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
}

.thumb-btn span {
  font-size: 0.9rem;
  color: var(--text-light);
  font-weight: 600;
  line-height: 1.5;
}

/* 联系区域样式 */
.contact-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  padding: 6rem 0;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.contact-section::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.1), transparent);
  border-radius: 50%;
}

.contact-section .section-header {
  position: relative;
  z-index: 2;
}

.contact-section .section-label {
  background: rgba(255, 255, 255, 0.2);
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.contact-section h2 {
  color: var(--white);
}

.contact-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 3rem;
  position: relative;
  z-index: 2;
}

.contact-info {
  display: grid;
  gap: 2rem;
}

.contact-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 2rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
  transition: all 0.3s ease;
}

.contact-card:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.contact-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
}

.contact-icon svg {
  width: 30px;
  height: 30px;
  stroke: var(--white);
  fill: none;
}

.contact-card h3 {
  font-size: 1.3rem;
  color: var(--white);
  margin-bottom: 1rem;
  font-weight: 800;
}

.contact-card a,
.contact-card p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.1rem;
  text-decoration: none;
  transition: color 0.3s ease;
  margin: 0;
}

.contact-card a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.contact-form-wrapper {
  display: flex;
  align-items: center;
}

.contact-form-card {
  background: rgba(255, 255, 255, 0.95);
  padding: 3rem;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  width: 100%;
}

.contact-form-card h3 {
  font-size: 1.8rem;
  color: var(--primary);
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.contact-form-card p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.contact-form-card .btn {
  margin-top: 1.5rem;
  width: 100%;
  justify-content: center;
}

/* 响应式样式更新 */
@media (max-width: 768px) {
  .product-detail {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .product-image {
    order: -1;
  }

  .solutions-timeline {
    padding-left: 2rem;
  }

  .solutions-timeline::before {
    left: 1rem;
  }

  .timeline-item {
    padding-left: 3rem;
  }

  .timeline-icon {
    left: -1rem;
    width: 50px;
    height: 50px;
  }

  .timeline-icon svg {
    width: 24px;
    height: 24px;
  }

  .solutions-highlight {
    grid-template-columns: 1fr;
  }

  .service-steps {
    grid-template-columns: 1fr;
  }

  .cases-showcase {
    grid-template-columns: 1fr;
  }

  .showcase-main {
    height: 300px;
  }

  .showcase-thumbnails {
    grid-template-columns: 1fr;
  }

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

  .tab-list {
    flex-direction: column;
    align-items: stretch;
  }

  .tab-btn {
    width: 100%;
    text-align: center;
  }
}