:root {
  color-scheme: light;
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-accent: #10b981;
  --color-accent-dark: #059669;
  --color-dark: #0f172a;
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted-text: #64748b;
  --color-border: #e2e8f0;
  --color-focus: #0ea5e9;
  --color-gradient-start: #0ea5e9;
  --color-gradient-end: #10b981;
  --font-body: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --space-unit: 0.25rem;
  --content-width: 76rem;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100dvh;
}

button,
input,
select,
textarea {
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-dark);
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.skip-link {
  left: 1rem;
  position: fixed;
  top: 1rem;
  transform: translateY(-200%);
  z-index: 100;
  background: var(--color-primary);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  transform: translateY(0);
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  height: 4rem;
  overflow: visible;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
}

.logo-icon {
  width: 2.25rem;
  height: 2.25rem;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
}

.logo span {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-links a {
  color: var(--color-muted-text);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-text);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
  border-radius: 1px;
}

.nav-links > .has-sub {
  position: relative;
  align-self: center;
}

.nav-links > .has-sub > a {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
}

.nav-links > .has-sub > a::after {
  content: '';
  width: 0.35rem;
  height: 0.35rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  opacity: 0.65;
}

.nav-links > .has-sub > .nav-sub {
  display: none;
  position: absolute;
  top: calc(100% + 0.35rem);
  left: 50%;
  transform: translateX(-50%);
  min-width: 9.5rem;
  margin: 0;
  padding: 0.45rem;
  list-style: none;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  z-index: 60;
}

.nav-links > .has-sub > .nav-sub::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -0.55rem;
  height: 0.55rem;
}

.nav-links > .has-sub > .nav-sub > li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links > .has-sub > .nav-sub a {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  white-space: nowrap;
  color: var(--color-muted-text);
}

.nav-links > .has-sub > .nav-sub a:hover,
.nav-links > .has-sub > .nav-sub a.active {
  color: var(--color-text);
  background: #f1f5f9;
}

.nav-links > .has-sub > .nav-sub a.active::after {
  display: none;
}

.nav-links > .has-sub:hover > .nav-sub,
.nav-links > .has-sub:focus-within > .nav-sub,
.nav-links > .has-sub.open > .nav-sub {
  display: block;
}

.nav-cta {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: white !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: var(--radius-sm);
  font-weight: 600 !important;
  transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: white !important;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  flex: none;
  z-index: 60;
}

.nav-toggle span {
  display: block;
  width: 1.15rem;
  height: 2px;
  border-radius: 1px;
  background: var(--color-text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.navbar.open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

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

body.nav-open {
  overflow: hidden;
}

/* ===== Hero 区域 ===== */
.hero {
  padding: 8rem 0 6rem;
  background: linear-gradient(180deg, #eff6ff 0%, #f0fdf4 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 50rem;
  height: 50rem;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 40rem;
  height: 40rem;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 9999px;
  font-size: 0.875rem;
  color: var(--color-primary-dark);
  font-weight: 500;
  margin-bottom: 1.5rem;
}

.hero-badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-muted-text);
  margin-bottom: 2.5rem;
  line-height: 1.75;
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: white;
  box-shadow: 0 4px 14px 0 rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px 0 rgba(14, 165, 233, 0.45);
  color: white;
}

.btn-secondary {
  background: white;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

/* Hero 右侧 - GIS 地图预览 */
.hero-visual {
  position: relative;
  aspect-ratio: 4/3;
}

.hero-map {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.hero-map svg {
  width: 100%;
  height: 100%;
}

.map-grid {
  opacity: 0.15;
}

.map-point {
  animation: mapPulse 2s ease-in-out infinite;
}

.map-point:nth-child(2) { animation-delay: 0.3s; }
.map-point:nth-child(3) { animation-delay: 0.6s; }
.map-point:nth-child(4) { animation-delay: 0.9s; }
.map-point:nth-child(5) { animation-delay: 1.2s; }

@keyframes mapPulse {
  0%, 100% { r: 4; opacity: 1; }
  50% { r: 8; opacity: 0.5; }
}

.map-legend {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  display: flex;
  justify-content: space-between;
  padding: 1rem;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.legend-item {
  text-align: center;
  color: #94a3b8;
  font-size: 0.75rem;
}

.legend-item strong {
  display: block;
  color: white;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.125rem;
}

.legend-item .dot-green { color: var(--color-accent); }
.legend-item .dot-blue { color: var(--color-primary); }
.legend-item .dot-orange { color: #f59e0b; }

/* ===== 通用区块 ===== */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 48rem;
  margin: 0 auto 3.5rem;
}

.section-tag {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--color-primary-dark);
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-muted-text);
  margin: 0;
  line-height: 1.75;
}

/* ===== 产品中心 ===== */
.products {
  background: white;
}

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

.product-card {
  padding: 2rem;
  background: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gradient-start), var(--color-gradient-end));
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

.product-card:hover::before {
  opacity: 1;
}

.product-icon {
  width: 3.5rem;
  height: 3.5rem;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(16, 185, 129, 0.1));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}

.product-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 0.75rem;
}

.product-card p {
  color: var(--color-muted-text);
  line-height: 1.7;
  margin: 0 0 1.25rem;
  font-size: 0.95rem;
}

.product-link {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  transition: gap 0.2s ease;
}

.product-card:hover .product-link {
  gap: 0.625rem;
}

/* ===== 解决方案 ===== */
.solutions {
  background: linear-gradient(180deg, var(--color-background) 0%, white 100%);
}

.solutions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.solution-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.solution-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.solution-visual {
  height: 14rem;
  position: relative;
  overflow: hidden;
}

.solution-visual.blue {
  background: linear-gradient(135deg, #0369a1 0%, #0ea5e9 50%, #38bdf8 100%);
}

.solution-visual.green {
  background: linear-gradient(135deg, #047857 0%, #10b981 50%, #34d399 100%);
}

.solution-visual svg {
  width: 100%;
  height: 100%;
  opacity: 0.9;
}

.solution-content {
  padding: 2rem;
}

.solution-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1rem;
}

.solution-features {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.solution-features li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.5rem 0;
  color: var(--color-muted-text);
  font-size: 0.95rem;
}

.solution-features li::before {
  content: '✓';
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  background: rgba(16, 185, 129, 0.15);
  color: var(--color-accent-dark);
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.125rem;
}

/* ===== GIS 特色 ===== */
.gis-feature {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.gis-feature::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 400 400'%3E%3Cdefs%3E%3Cpattern id='grid' width='40' height='40' patternUnits='userSpaceOnUse'%3E%3Cpath d='M 40 0 L 0 0 0 40' fill='none' stroke='rgba(14,165,233,0.1)' stroke-width='1'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='400' height='400' fill='url(%23grid)'/%3E%3C/svg%3E");
  opacity: 0.5;
}

.gis-feature .container {
  position: relative;
  z-index: 1;
}

.gis-feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.gis-feature h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
}

.gis-feature h2 span {
  background: linear-gradient(135deg, #38bdf8, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gis-feature > p {
  font-size: 1.125rem;
  color: #94a3b8;
  line-height: 1.75;
  margin: 0 0 2rem;
}

.gis-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.gis-stat {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
}

.gis-stat strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #38bdf8, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.gis-stat span {
  font-size: 0.875rem;
  color: #94a3b8;
}

.gis-map-preview {
  aspect-ratio: 1;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.gis-map-preview svg {
  width: 100%;
  height: 100%;
}

/* ===== 关于我们 ===== */
.about {
  background: white;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-content h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin: 0 0 1.5rem;
  letter-spacing: -0.02em;
}

.about-content p {
  color: var(--color-muted-text);
  line-height: 1.8;
  margin: 0 0 1.5rem;
  font-size: 1.05rem;
}

.about-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.highlight-icon {
  flex-shrink: 0;
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(16, 185, 129, 0.1));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
}

.highlight-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 0.25rem;
}

.highlight-item p {
  font-size: 0.875rem;
  color: var(--color-muted-text);
  margin: 0;
  line-height: 1.6;
}

.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 1rem;
  aspect-ratio: 1;
}

.about-tile {
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
}

.about-tile.tile-1 {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  color: white;
}

.about-tile.tile-2 {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  grid-row: span 2;
}

.about-tile.tile-3 {
  background: var(--color-background);
  border: 1px solid var(--color-border);
}

.about-tile strong {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.about-tile span {
  font-size: 0.9rem;
  opacity: 0.9;
}

.about-tile.tile-3 strong {
  color: var(--color-text);
}

.about-tile.tile-3 span {
  color: var(--color-muted-text);
  opacity: 1;
}

/* ===== 资讯中心（首页） ===== */
.news-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.news-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.news-card-cover {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.news-card-cover::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,0.15), transparent 50%);
}

.news-card-cover.blue { background: linear-gradient(135deg, #0ea5e9, #0284c7); }
.news-card-cover.green { background: linear-gradient(135deg, #10b981, #059669); }
.news-card-cover.teal { background: linear-gradient(135deg, #14b8a6, #0f766e); }

.news-card-body {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--color-muted-text);
  margin-bottom: 0.75rem;
}

.news-card-category {
  padding: 0.125rem 0.625rem;
  background: rgba(14, 165, 233, 0.1);
  color: var(--color-primary-dark);
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.75rem;
}

.news-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.625rem;
  line-height: 1.45;
  transition: color 0.2s ease;
}

.news-card h3 a,
.news-card-body > p a {
  color: inherit;
  text-decoration: none;
}

.news-card-body > p a {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card h3 a:hover,
.news-card-body > p a:hover {
  color: var(--color-primary);
}

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

.news-card-body > p {
  font-size: 0.875rem;
  color: var(--color-muted-text);
  line-height: 1.65;
  margin: 0 0 1rem;
  flex: 1;
}

.news-card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap 0.2s ease;
  align-self: flex-start;
}

.news-card:hover .news-card-link {
  letter-spacing: 0.03em;
}

.section-more {
  text-align: center;
}

/* ===== 联系我们 ===== */
.contact {
  background: var(--color-background);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 3rem;
}

.contact-info h2 {
  font-size: 2.25rem;
  font-weight: 800;
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.contact-info > p {
  color: var(--color-muted-text);
  margin: 0 0 2rem;
  line-height: 1.75;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.contact-icon {
  flex-shrink: 0;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 6px 14px rgba(14, 165, 233, 0.22);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.contact-icon svg {
  width: 1.2rem;
  height: 1.2rem;
  display: block;
}

.contact-item:hover .contact-icon {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(14, 165, 233, 0.28);
}

.contact-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.25rem;
  color: var(--color-muted-text);
  font-weight: 500;
}

.contact-item p {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.contact-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.contact-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

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

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  transition: all 0.2s ease;
  background: var(--color-background);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: white;
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 7rem;
}

/* ===== 页脚 ===== */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin: 1rem 0;
  line-height: 1.7;
  font-size: 0.9rem;
}

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

.footer-col h4 {
  color: white;
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 1.25rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-grid,
  .gis-feature-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .section-header h2,
  .gis-feature h2,
  .about-content h2 {
    font-size: 2rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    padding: 0.75rem 1.5rem 1.25rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    max-height: min(80vh, 32rem);
    overflow: auto;
  }

  .navbar.open .nav-links {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 0.85rem 0.35rem;
    font-size: 1rem;
    border-bottom: 1px solid #eef2f7;
  }

  .nav-links li:last-child a {
    border-bottom: 0;
  }

  .nav-links a.active::after {
    display: none;
  }

  .nav-links > .has-sub > a {
    display: flex;
    width: 100%;
  }

  .nav-links > .has-sub > a::after {
    margin-left: auto;
    transform: rotate(45deg);
    transition: transform 0.2s ease;
  }

  .nav-links > .has-sub.open > a::after {
    transform: rotate(-135deg) translateY(2px);
  }

  .nav-links > .has-sub > .nav-sub {
    position: static;
    display: none;
    transform: none;
    min-width: 0;
    margin: 0 0 0.35rem;
    padding: 0 0 0 0.85rem;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
  }

  .nav-links > .has-sub > .nav-sub::before {
    display: none;
  }

  .nav-links > .has-sub.open > .nav-sub {
    display: block;
  }

  .nav-links > .has-sub > .nav-sub a {
    padding: 0.7rem 0.35rem;
    font-size: 0.95rem;
    color: #64748b;
    background: transparent;
  }

  .nav-links > .has-sub > .nav-sub a:hover,
  .nav-links > .has-sub > .nav-sub a.active {
    background: transparent;
    color: var(--color-text);
  }

  .nav-links .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
    border-bottom: 0 !important;
  }
  
  .products-grid,
  .solutions-grid,
  .about-highlights,
  .gis-stats {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero {
    padding: 6rem 0 4rem;
  }
  
  .section {
    padding: 3rem 0;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

/* FAQ 手风琴 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.faq-item.open {
  border-color: rgba(14, 165, 233, 0.45);
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.08);
}
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.125rem 1.25rem;
  cursor: pointer;
  font-weight: 650;
  color: var(--color-text);
  line-height: 1.45;
}
.faq-q .pm {
  width: 1.75rem;
  height: 1.75rem;
  flex: none;
  border-radius: 999px;
  background: rgba(14, 165, 233, 0.08);
  color: var(--color-primary);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  line-height: 1;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.faq-item.open .pm {
  transform: rotate(45deg);
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-a-inner {
  padding: 0 1.25rem 1.25rem;
  color: var(--color-muted-text);
  line-height: 1.75;
}
.faq-a-inner p { margin: 0 0 0.75rem; }
.faq-a-inner p:last-child { margin-bottom: 0; }
.faq-a-inner ul { margin: 0.5rem 0 0; padding-left: 1.2rem; }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}