/* ============================================
   蓝图航空 LANTU AVIATION
   ============================================ */

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

:root {
  --color-primary: #1677FF;
  --color-primary-dark: #0958D9;
  --color-text: #1A1A1A;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-bg: #FFFFFF;
  --color-bg-gray: #F7F7F7;
  --color-border: #E8E8E8;
  --max-width: 1350px;
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

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

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

img {
  max-width: 100%;
  display: block;
}
h2,h3{
  font-weight: normal;
}
button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* === Navigation === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all 0.3s ease;
}

/* PC Navbar */
.navbar-desktop {
  background: transparent;
  border-bottom: 1px solid transparent;
}

.navbar-desktop.scrolled {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.navbar-desktop.scrolled .nav-container span {
  color: var(--color-text);
}

.navbar-desktop.scrolled .nav-menu a {
  color: var(--color-text);
}

.navbar-desktop.scrolled .btn-text {
  color: var(--color-text);
}

.navbar-desktop.scrolled .nav-lang {
  color: var(--color-text-light);
}

/* Mobile Navbar */
.navbar-mobile {
  display: none;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.navbar-mobile .nav-logo span {
  color: var(--color-text-primary);
}

.navbar-mobile .nav-logo img {
  width: 28px;
  height: 28px;
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.navbar-mobile .nav-container {
  height: 60px;
  padding: 0 20px;
}

.nav-container span{
  color: #fff;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 600;
}

.navbar-mobile .nav-logo {
  font-size: 18px;
}

.nav-logo img {
  width: 32px;
  height: 32px;
}

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

.nav-menu a {
  font-size: 15px;
  color: #fff;
}

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

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

.btn-text {
  font-size: 14px;
  color: #fff;
}

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

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

.nav-lang {
  font-size: 14px;
  color: var(--color-text-light);
  cursor: pointer;
}

.nav-mobile-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
  position: relative;
}

.nav-mobile-toggle span {
  width: 22px;
  height: 2px;
  background: #333;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

.nav-mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-mobile-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.nav-mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Nav - Sidebar Drawer */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: #ffffff;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: 80px 0 40px;
  box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav a {
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
  border-left: 3px solid transparent;
  transition: all 0.3s ease;
  position: relative;
  display: block;
}

.mobile-nav a::after {
  content: '';
  position: absolute;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-right: 2px solid var(--color-text-light);
  border-bottom: 2px solid var(--color-text-light);
  transform: translateY(-50%) rotate(-45deg);
  opacity: 0;
  transition: all 0.3s ease;
}

.mobile-nav a:hover {
  background: rgba(22, 119, 255, 0.05);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
  padding-left: 40px;
}

.mobile-nav a:hover::after {
  opacity: 1;
  border-color: var(--color-primary);
}

.mobile-nav a:active {
  background: rgba(22, 119, 255, 0.1);
}

.mobile-nav-cta {
  margin: 24px 32px 0 32px;
  padding: 14px 0 !important;
  text-align: center;
  background: var(--color-primary) !important;
  color: #ffffff !important;
  border-radius: 4px;
  border-left: none !important;
  font-weight: 600;
}

.mobile-nav-cta::after {
  display: none !important;
}

.mobile-nav-cta:hover {
  background: #0066ff !important;
  color: #ffffff !important;
  padding-left: 0 !important;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(22, 119, 255, 0.3);
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(2px);
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* === Hero Section === */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  user-select: none; /* Prevent text selection during drag */
}

.hero-slider {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.3s ease;
}

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

.hero-bg {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(22, 119, 255, 0.2);
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  position: absolute;
  bottom: 120px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  color: #fff;
  width: 100%;
  max-width: 800px;
  padding: 0 24px;
  z-index: 2;
}

.hero-title {
  font-size: 56px;
  font-weight: normal;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.hero-subtitle {
  font-size: 20px;
  margin-bottom: 40px;
  opacity: 0.95;
}

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

.btn-primary {
  padding: 10px 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 4px;
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
}

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

.btn-secondary {
  padding: 10px 32px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  color: #fff;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 16px;
  font-weight: 500;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
}

.indicator {
  width: 40px;
  height: 3px;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: var(--transition);
}

.indicator.active {
  background: #fff;
}

/* === Quick Links === */
.quick-links {
  padding: 60px 0;
  background: var(--color-bg);
}

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

.quick-link-card {
  padding: 40px 32px;
  background: var(--color-bg-gray);
  border-radius: 4px;
  text-align: center;
  transition: var(--transition);
}

.quick-link-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.quick-link-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  border-radius: 50%;
}

.quick-link-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--color-primary);
}

.quick-link-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.quick-link-card p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* === Products Section === */
.products {
  padding: 100px 0;
  background: var(--color-bg);
}

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

.section-header-simple h2 {
  font-size: 40px;
  font-weight: normal;
  margin-bottom: 16px;
}
.section-header-simple p{
  color: rgba(0,0,0,.6);
}
/* Product Grid Layout */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 328px);
  gap: 16px 0; /* 上下16px，左右0 */
}

/* Product Cards */
.product-card {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  width: 418px;
  height: 314px;
  margin-right: 32px; /* 第1个卡片右间距32px */
}

/* 第2个卡片右间距为0 */
.product-card:nth-child(3) {
  margin-right: 0;
}



.product-card-wide {
  width: 869px;
  height: 314px;
  margin-right: 0; /* wide卡片右间距0 */
}

.product-card-wide:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

/* Large card - spans 2 columns, 2 rows */
.product-card-large {
  grid-row: span 2;
  width: 418px;
  height: 660px;
  margin-right: 32px; /* large卡片右间距32px */
}

/* Wide card - spans 2 columns, 1 row */
.product-card-wide {
  grid-column: span 2;
}

/* Background Image */
.product-card-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transition: transform 0.6s ease;
}

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

.product-card-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Overlay */
.product-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.product-card:hover .product-card-overlay {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, rgba(0, 0, 0, 0.2) 50%, transparent 100%);
  transition: background 0.4s ease;
}

/* Content */
.product-card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0 32px 22px 32px;
  color: #fff;
  z-index: 1;
}

.product-card-content h3 {
  font-size: 24px;
  font-weight: normal;
  margin: 0;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1), margin 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-card:hover .product-card-content h3 {

  margin-bottom: 20px;
}

.product-card-large .product-card-content h3 {
  font-size: 32px;
}


/* Product Specs - Hidden by default */
.product-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  visibility: hidden; /* 使用visibility代替display */
  opacity: 0;
  height: 0; /* 默认高度为0，不占空间 */
  overflow: hidden;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.1s, 
              transform 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.1s,
              height 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s 0.5s; /* 延迟隐藏 */
  pointer-events: none;
}

.product-card:hover .product-specs {
  visibility: visible;
  opacity: 1;
  height: auto; /* 悬停时自动高度 */
  transform: translateY(0);
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.1s, 
              transform 0.5s cubic-bezier(0.4, 0, 0.2, 1) 0.1s,
              height 0.5s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0s 0s; /* 立即显示 */
  pointer-events: auto;
}

/* Spec Item - 统一使用卡片样式 */
.spec-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: background 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.product-card:hover .spec-item {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

/* 单独悬停每个spec-item */
.spec-item:hover {
  background: rgba(255, 255, 255, 0.18) !important;
  border-color: rgba(255, 255, 255, 0.4) !important;
  transform: translateY(-2px);
}

.spec-label {
  font-size: 11px;
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

.spec-value {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.5px;
}

/* Wide card specs layout */
.product-card-wide .product-specs {
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.product-card-wide .spec-item {
  padding: 12px 14px;
}

.product-card-wide .spec-value {
  font-size: 15px;
}

/* Products More Button */
.products-more {
  text-align: center;
  margin-top: 60px;
}

.btn-more {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 40px;
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  z-index: 1;
  transition: color 0.4s ease, border-color 0.4s ease;
}

.btn-more::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: var(--color-primary);
  z-index: -1;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-more:hover {
  border-color: var(--color-primary);
  color: #fff;
}

.btn-more:hover::before {
  width: 100%;
}

.btn-more svg {
  display: none;
}

/* Simulator specs - special layout */
.product-specs-simulator {
  grid-template-columns: 1fr;
  gap: 12px;
}

.product-specs-simulator .spec-label {
  font-size: 13px;
  font-weight: 600;
  color: #fff;
  text-transform: none;
  letter-spacing: 0;
}

.product-specs-simulator .spec-value {
  font-size: 12px;
  font-weight: normal;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.5;
  letter-spacing: 0;
}


/* === Technology Section === */
.technology {
  padding: 100px 0;
  background: var(--color-bg-gray);
}

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

.section-header-centered h2 {
  font-size: 40px;
  margin-bottom: 16px;
}

.section-header-centered p {
  font-size: 18px;
  color: var(--color-text-light);
}

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

.tech-card {
  padding: 40px 32px;
  background: var(--color-bg);
  border-radius: 4px;
  text-align: center;
  transition: var(--transition);
}

.tech-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.tech-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(22, 119, 255, 0.1);
  border-radius: 50%;
}

.tech-icon svg {
  width: 30px;
  height: 30px;
  stroke: var(--color-primary);
}

.tech-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

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

/* === Service Banner === */
.service-banner {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-primary), #00B9E4);
  color: #fff;
  text-align: center;
}

.service-content h2 {
  font-size: 40px;
  font-weight: 600;
  margin-bottom: 16px;
}

.service-content > p {
  font-size: 18px;
  margin-bottom: 60px;
  opacity: 0.95;
}

.service-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto 60px;
}

.service-item h4 {
  font-size: 20px;
  margin-bottom: 8px;
}

.service-item p {
  font-size: 15px;
  opacity: 0.9;
}

.btn-primary-light {
  display: inline-block;
  padding: 14px 32px;
  background: #fff;
  color: var(--color-primary);
  border-radius: 4px;
  font-size: 16px;
  font-weight: 500;
}

.btn-primary-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* === Vision Section === */
.vision {
  padding: 100px 0;
  background: var(--color-bg);
}

.vision-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.vision-card {
  padding: 40px;
  background: var(--color-bg-gray);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.vision-number {
  font-size: 48px;
  font-weight: 700;
  color: rgba(22, 119, 255, 0.1);
  margin-bottom: 20px;
}

.vision-card h3 {
  font-size: 24px;
  margin-bottom: 8px;
}

.vision-route {
  font-size: 16px;
  color: var(--color-primary);
  margin-bottom: 12px;
  font-weight: 500;
}

.vision-card p:last-child {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
}

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

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

.about-text h2 {
  font-size: 40px;
  font-weight: 600;
  margin-bottom: 24px;
}

.about-text p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin: 40px 0;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 40px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

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

.about-image {
  border-radius: 4px;
  overflow: hidden;
}

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

/* ========== City Network Section ========== */
.city-network {
  padding: 120px 0;
  position: relative;
  background-image: url('../images/vision-city.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.city-network::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  top: 0;
  background: linear-gradient(to top, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.96) 50%, rgba(255, 255, 255,  0.90) 100%);
  pointer-events: none;
  z-index: 1;
}

.city-network .container {
  position: relative;
  z-index: 2;
}

.network-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.network-card {
  position: relative;
  background: rgba(255, 255, 255, 1);
  backdrop-filter: blur(20px);
  padding: 48px 40px;
  border-radius: 2px;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid rgba(22, 119, 255, 0.1);
  overflow: hidden;
}

.network-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary) 0%, transparent 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.network-card:hover {
  transform: translateY(-12px);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 30px 60px rgba(22, 119, 255, 0.15);
  border-color: rgba(22, 119, 255, 0.3);
}

.network-number {
  font-size: 56px;
  font-weight: 200;
  color: var(--color-primary);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 24px;
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.network-card:hover .network-number {
  opacity: 0.3;
  transform: scale(1.1);
}

.network-card h3 {
  font-size: 26px;
  font-weight: 500;
  margin-bottom: 16px;
  color: var(--color-text-primary);
  transition: color 0.3s ease;
}

.network-card:hover h3 {
  color: var(--color-primary);
}

.network-route {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-light);
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.network-highlight {
  position: relative;
  display: inline-block;
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding: 0 0 8px 0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.network-highlight::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-primary) 0%, transparent 100%);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.network-card:hover .network-highlight {
  color: var(--color-primary);
  letter-spacing: 1px;
}

.network-card:hover .network-highlight::after {
  height: 2px;
  box-shadow: 0 0 8px rgba(22, 119, 255, 0.5);
}

.network-card > p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
}

/* ========== Scenarios Section ========== */
.scenarios {
  padding: 120px 0;
  background: white;
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  margin-top: 60px;
}

.scenario-card {
  position: relative;
  height: 400px;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.scenario-card:hover {
  transform: translateY(-8px);
}

.scenario-image {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.scenario-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scenario-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px;
  background: transparent;
  color: white;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.scenario-overlay h4 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  transform: translateY(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.scenario-overlay p {
  font-size: 14px;
  line-height: 1.6;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.scenario-card:hover .scenario-overlay {
  background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.6) 70%, transparent 100%);
}

.scenario-card:hover .scenario-overlay h4 {
  transform: translateY(-8px);
}

.scenario-card:hover .scenario-overlay p {
  opacity: 1;
  transform: translateY(0);
}

/* ========== News Section ========== */
.news {
  padding: 120px 0;
  background: #fafafa;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-top: 60px;
}

.news-card {
  background: white;
  border-radius: 4px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
}

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

.news-image {
  position: relative;
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.news-meta {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.news-date {
  display: inline-block;
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 400;
}

.news-content {
  padding: 32px;
}

.news-content h3 {
  font-size: 20px;
  margin-bottom: 16px;
  color: var(--color-text-primary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.3s ease;
}

.news-card:hover .news-content h3 {
  color: var(--color-primary);
}

.news-content p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 24px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
}

.news-link svg {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
}

.news-card:hover .news-link svg {
  transform: translateX(4px);
}

.news-more {
  text-align: center;
  margin-top: 60px;
}

/* === CTA Section === */
.cta {
  position: relative;
  padding: 240px 0;
  background: var(--color-bg);
  text-align: center;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('../images/coop.jpg') center/cover no-repeat;
  z-index: 0;
}

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

.cta-content h2 {
  font-size: 40px;
  font-weight: normal;
  margin-bottom: 16px;
}

.cta-content > p {
  font-size: 18px;
  color: var(--color-text-light);
  margin-bottom: 60px;
}

.cta-form {
  max-width: 900px;
  margin: 0 auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 16px;
}

.form-select,
.form-input {
  padding: 14px 20px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: 15px;
  font-family: inherit;
}

.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* === Footer === */
.footer {
  padding: 80px 0 40px;
  background: var(--color-bg-gray);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 60px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  margin-bottom: 16px;
}

.footer-logo img {
  width: 32px;
  height: 32px;
}

.footer-col > p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.footer-desc {
  line-height: 1.8;
  margin-top: 16px !important;
}

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

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

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

.footer-contact {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-text-muted);
}

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

.footer-links a {
  font-size: 13px;
  color: var(--color-text-muted);
}

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

/* === Responsive === */
@media (max-width: 1024px) {
  .container {
    padding: 0 32px;
  }

  /* Hide PC Navbar, Show Mobile Navbar */
  .navbar-desktop {
    display: none !important;
  }

  .navbar-mobile {
    display: block !important;
  }

  /* Hero Section */
  .hero {
    height: 60vh;
    min-height: 500px;
  }

  .hero-title {
    font-size: 36px;
  }

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

  .hero-actions {
    flex-direction: row;
    gap: 16px;
  }

  /* Quick Links */
  .quick-links .container {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* Products Section */
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto;
    gap: 16px;
  }

  .product-card-large {
    grid-column: span 2;
    grid-row: span 1;
    height: 300px;
    width: 100% !important;
  }

  .product-card {
    height: 240px;
    width: 100% !important;
    margin-right: 0 !important;
  }

  .product-card-wide {
    grid-column: span 2;
    grid-row: span 1;
    height: 280px;
    width: 100% !important;
  }

  .product-specs {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  /* Tech Section */
  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .tech-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 16px;
  }

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

  /* Service Banner */
  .service-features {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Vision Section */
  .vision-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* Network Section */
  .network-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .network-card {
    padding: 40px 32px;
  }

  /* Scenarios Section */
  .scenarios-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .scenario-card {
    height: 300px;
  }

  .scenario-overlay {
    padding: 24px;
  }

  /* News Section */
  .news-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .news-image {
    height: 220px;
  }

  .news-content {
    padding: 28px 24px;
  }

  .news-link svg {
    width: 18px;
    height: 18px;
  }

  /* About Section */
  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  /* CTA Section */
  .cta {
    padding: 120px 0;
  }

  .cta-content h2 {
    font-size: 28px;
  }

  .cta-content > p {
    font-size: 14px;
  }

  .cta-form {
    max-width: 100%;
    padding: 32px 24px;
  }

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

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

  .footer-col:first-child {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  /* Section Spacing */
  section {
    padding:  60px 0 !important;
  }

  .hero {
    height: 70vh;
    min-height: 600px;
    padding: 60px 0 0 !important;
  }

  /* Typography */
  .section-header-simple h2,
  .section-header-centered h2 {
    font-size: 28px;
  }

  .section-header-simple p,
  .section-header-centered p {
    font-size: 14px;
  }

  /* Hero Section */
  .hero-content {
    padding: 0 20px;
  }

  .hero-title {
    font-size: 32px;
    line-height: 1.3;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    justify-content: center;
  }

  .hero-indicators {
    bottom: 24px;
  }

  /* Quick Links */
  .quick-links {
    padding: 60px 0;
  }

  .quick-links .container {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .quick-link-card {
    padding: 20px;
  }

  .quick-link-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
  }

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

  .quick-link-card h3 {
    font-size: 15px;
  }

  .quick-link-card p {
    font-size: 13px;
  }

  /* Products Section */
  .product-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 12px;
  }

  .product-card-large,
  .product-card-wide {
    grid-column: span 1;
    grid-row: span 1;
    height: 280px;
    width: 100% !important;
  }

  .product-card {
    height: 280px;
    width: 100% !important;
    margin-right: 0 !important;
  }

  .product-card-content {
    padding: 0 24px 22px 24px;
  }

  .product-card-content h3 {
    font-size: 22px;
  }

  .product-specs {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 16px 0;
  }

  .spec-item {
    padding: 12px 16px;
  }

  .spec-label {
    font-size: 12px;
  }

  .spec-value {
    font-size: 15px;
  }

  .products-more {
    margin-top: 32px;
  }

  /* Tech Section */
  .tech-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .tech-card {
    padding: 28px 24px;
  }

  .tech-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
  }

  .tech-icon svg {
    width: 22px;
    height: 22px;
  }

  .tech-card h3 {
    font-size: 16px;
  }

  .tech-card p {
    font-size: 13px;
  }

  /* Service Banner */
  .service-banner {
    padding: 80px 0;
  }

  .service-content h2 {
    font-size: 28px;
  }

  .service-content > p {
    font-size: 14px;
  }

  .service-features {
    margin-top: 40px;
    max-width: 100%;
  }

  .service-item h4 {
    font-size: 16px;
  }

  .service-item p {
    font-size: 13px;
  }

  /* Vision Section */
  .vision-grid {
    gap: 12px;
  }

  .vision-card {
    padding: 32px 24px;
  }

  .vision-card h3 {
    font-size: 18px;
  }

  .vision-card p {
    font-size: 13px;
  }

  /* Network Section */
  .city-network {
    padding: 80px 0;
    background-attachment: scroll;
  }

  .network-grid {
    margin-top: 40px;
    gap: 16px;
  }

  .network-card {
    padding: 32px 24px;
  }

  .network-number {
    font-size: 48px;
    margin-bottom: 20px;
  }

  .network-card h3 {
    font-size: 22px;
  }

  .network-route {
    font-size: 15px;
    margin-bottom: 16px;
    padding-bottom: 16px;
  }

  .network-highlight {
    font-size: 16px;
    margin-bottom: 12px;
  }

  .network-card > p {
    font-size: 13px;
  }

  /* Scenarios Section */
  .scenarios {
    padding: 80px 0 !important;
  }

  .scenarios-grid {
    grid-template-columns: 1fr;
    margin-top: 40px;
    gap: 12px;
  }

  .scenario-card {
    height: 280px;
  }

  .scenario-overlay {
    padding: 24px;
  }

  .scenario-overlay h4 {
    font-size: 18px;
    margin-bottom: 10px;
  }

  .scenario-overlay p {
    font-size: 13px;
  }

  /* News Section */
  .news {
    padding: 80px 0;
  }

  .news-grid {
    margin-top: 40px;
    gap: 20px;
  }

  .news-image {
    height: 200px;
  }

  .news-date {
    font-size: 12px;
    padding: 4px 10px;
  }

  .news-content {
    padding: 24px;
  }

  .news-content h3 {
    font-size: 18px;
    margin-bottom: 12px;
  }

  .news-content p {
    font-size: 13px;
    margin-bottom: 20px;
  }

  .news-link {
    font-size: 13px;
  }

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

  .news-more {
    margin-top: 40px;
  }

  /* CTA Section */
  .cta {
    padding: 120px 0;
  }

  .cta-content h2 {
    font-size: 28px;
  }

  .cta-content > p {
    font-size: 14px;
  }

  .cta-form {
    max-width: 100%;
    padding: 32px 24px;
  }

  .form-row {
    gap: 16px;
  }

  .form-input,
  .form-select {
    padding: 14px 16px;
    font-size: 14px;
  }

  .btn-submit {
    padding: 14px 32px;
    font-size: 15px;
  }

  /* Footer */
  .footer {
    padding: 0px 0 30px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 40px;
    display: none;
  }

  .footer-col:first-child {
    grid-column: span 1;
  }

  .footer-logo {
    font-size: 18px;
  }

  .footer-col h4 {
    font-size: 15px;
    margin-bottom: 16px;
  }

  .footer-col a,
  .footer-col p {
    font-size: 13px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
    padding-top: 30px;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }

  /* Buttons */
  .btn-more {
    padding: 12px 32px;
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  /* Hero Section */
  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 14px;
  }

  /* Section Headers */
  .section-header-simple h2,
  .section-header-centered h2 {
    font-size: 24px;
  }

  .section-header-simple p,
  .section-header-centered p {
    font-size: 13px;
  }

  /* Product Cards */
  .product-card,
  .product-card-large,
  .product-card-wide {
    grid-row: span 1;
    height: 260px;
    width: 100% !important;
  }

  .product-card-content h3 {
    font-size: 20px;
  }

  /* Network Cards */
  .network-card h3 {
    font-size: 20px;
  }

  .network-number {
    font-size: 40px;
  }

  /* Tech Cards */
  .tech-icon {
    width: 44px;
    height: 44px;
  }

  .tech-icon svg {
    width: 20px;
    height: 20px;
  }

  /* Scenario Cards */
  .scenario-card {
    height: 240px;
  }

  .scenario-overlay {
    padding: 20px;
  }

  .scenario-overlay h4 {
    font-size: 16px;
  }

  /* News Cards */
  .news-image {
    height: 180px;
  }

  .news-content {
    padding: 20px;
  }

  .news-content h3 {
    font-size: 16px;
  }

  .news-link svg {
    width: 14px;
    height: 14px;
  }

  /* CTA Form */
  .cta-form {
    padding: 24px 20px;
  }

  /* Quick Links - Stack on smallest screens */
  .quick-link-icon {
    width: 44px;
    height: 44px;
  }

  .quick-link-icon svg {
    width: 22px;
    height: 22px;
  }

  .quick-link-card h3 {
    font-size: 14px;
  }

  .quick-link-card p {
    font-size: 12px;
  }
}