/* ========================================
   星驰无人机俱乐部 - 主样式表
   科技蓝 #0066CC | Apple 极简风
   ======================================== */

/* --- CSS Variables --- */
:root {
  --primary: #0066CC;
  --primary-light: #4A90D9;
  --primary-dark: #004C99;
  --primary-gradient: linear-gradient(135deg, #0066CC, #4A90D9);
  --black: #1D1D1F;
  --gray-900: #2D2D2F;
  --gray-700: #515154;
  --gray-500: #86868B;
  --gray-300: #D2D2D7;
  --gray-100: #F5F5F7;
  --white: #FFFFFF;
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text',
    'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1200px;
  --nav-height: 64px;
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

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

.section {
  padding: 100px 0;
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--black);
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 18px;
  text-align: center;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 60px;
  line-height: 1.7;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(0, 102, 204, 0.35);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 20px rgba(0, 102, 204, 0.45);
  transform: translateY(-2px);
}

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

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

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

.btn-white:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 18px;
}

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  background: var(--glass-bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--black);
}

.navbar-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 18px;
}

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

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray-700);
  position: relative;
  padding: 4px 0;
}

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

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

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

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--black);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(180deg, var(--gray-100) 0%, var(--white) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    ellipse at 50% 40%,
    rgba(0, 102, 204, 0.06) 0%,
    transparent 60%
  );
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 102, 204, 0.08);
  border-radius: 50px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 22px;
  color: var(--gray-500);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

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

/* Hero drone animation */
.hero-drone {
  width: 80px;
  height: 80px;
  margin: 0 auto 32px;
  position: relative;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* --- Stats Section --- */
.stats {
  background: var(--primary);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item h3 {
  font-size: 44px;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.stat-item p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 400;
}

/* --- Features / Cards Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  text-align: center;
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 102, 204, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 20px;
  transition: var(--transition);
}

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

.feature-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--black);
}

.feature-card p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.7;
}

/* --- Cases Section --- */
.cases-section {
  background: var(--gray-100);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

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

.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.case-image {
  height: 220px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 56px;
  color: rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.case-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.2) 100%);
}

.case-body {
  padding: 32px;
}

.case-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0, 102, 204, 0.08);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 12px;
}

.case-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.case-body p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 16px;
}

.case-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.case-link:hover {
  gap: 10px;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: 100px 24px;
  background: linear-gradient(180deg, var(--gray-100) 0%, var(--white) 100%);
}

.cta-section h2 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-section p {
  font-size: 18px;
  color: var(--gray-500);
  max-width: 500px;
  margin: 0 auto 36px;
}

/* --- Timeline (About page) --- */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gray-300);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 40px;
  margin-bottom: 48px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  border: 4px solid var(--white);
  box-shadow: 0 0 0 2px var(--primary);
  z-index: 2;
  top: 6px;
}

.timeline-content {
  width: calc(50% - 50px);
  background: var(--white);
  padding: 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.timeline-content h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.timeline-content h5 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--gray-500);
}

/* --- Team Section --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.team-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: var(--transition);
}

.team-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.team-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--white);
  margin: 0 auto 16px;
}

.team-card h4 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-card .role {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 4px;
}

.team-card .phone {
  font-size: 14px;
  color: var(--gray-500);
}

/* --- Services Page --- */
.services-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: var(--transition);
}

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

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.service-icon {
  width: 56px;
  height: 56px;
  background: rgba(0, 102, 204, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-features span {
  padding: 6px 14px;
  background: var(--gray-100);
  border-radius: 50px;
  font-size: 0.8rem;
  color: var(--gray-700);
}

/* --- Contact Page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}

.contact-info h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

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

.contact-item-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: rgba(0, 102, 204, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.contact-item-text h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-item-text p {
  font-size: 14px;
  color: var(--gray-500);
  line-height: 1.6;
}

/* Social links */
.social-links {
  display: flex;
  gap: 12px;
  margin-top: 32px;
}

.social-link {
  width: 48px;
  height: 48px;
  background: var(--gray-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--gray-700);
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

/* Contact Form */
.contact-form {
  background: var(--white);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.contact-form h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-family: var(--font-sans);
  transition: var(--transition);
  background: var(--gray-100);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  font-size: 16px;
}

/* --- Footer --- */
.footer {
  background: var(--black);
  color: var(--gray-500);
  padding: 60px 0 32px;
}

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

.footer-brand h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--gray-500);
  margin-bottom: 10px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-icp {
  text-align: center;
  padding-top: 16px;
}

.footer-icp a {
  font-size: 0.8rem;
  color: var(--gray-500);
  transition: var(--transition);
}

.footer-icp a:hover {
  color: var(--white);
}

.footer-bottom p {
  font-size: 0.8rem;
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  color: var(--gray-500);
  font-size: 16px;
}

.footer-social a:hover {
  color: var(--white);
}

/* --- Page Header (subpages) --- */
.page-header {
  padding: 120px 24px 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--gray-100) 0%, var(--white) 100%);
}

.page-header h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
}

.page-header p {
  font-size: 18px;
  color: var(--gray-500);
  max-width: 500px;
  margin: 0 auto;
}

/* --- Animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .services-showcase {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }
  .section-title {
    font-size: 32px;
  }
  .section-subtitle {
    font-size: 16px;
    margin-bottom: 40px;
  }

  .hero h1 {
    font-size: 36px;
  }
  .hero p {
    font-size: 18px;
  }
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item h3 {
    font-size: 32px;
  }

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

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

  .cta-section h2 {
    font-size: 32px;
  }

  /* Navigation */
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transform: translateY(-120%);
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a {
    font-size: 18px;
    padding: 8px 0;
  }

  .nav-toggle {
    display: flex;
  }

  /* Timeline */
  .timeline::before {
    left: 24px;
  }
  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
    padding-left: 56px;
  }
  .timeline-dot {
    left: 24px;
  }
  .timeline-content {
    width: 100%;
  }

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

  .page-header h1 {
    font-size: 34px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-form {
    padding: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* --- Contact Page Additional Styles --- */
.contact-section {
  background: var(--gray-100);
}

.contact-info h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.contact-subtitle {
  font-size: 16px;
  color: var(--gray-500);
  margin-bottom: 40px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.contact-item {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--gray-300);
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(0, 102, 204, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.contact-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--black);
}

.contact-item p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.7;
}

.contact-item a {
  color: var(--primary);
  font-weight: 500;
}

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

.contact-note {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* Contact Form Wrapper */
.contact-form-wrapper {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.contact-form-wrapper h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-form-wrapper .contact-subtitle {
  margin-bottom: 32px;
}

.contact-form {
  width: 100%;
}

.btn-block {
  width: 100%;
}

/* --- Cases Detail Page --- */
.cases-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.case-detail-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.case-detail-image {
  height: 240px;
  background: var(--primary-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 64px;
}

.case-detail-body {
  padding: 32px;
}

.case-detail-body h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.case-detail-body ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: 12px;
}

.case-detail-body ul li {
  font-size: 15px;
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: 6px;
}

.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.case-meta span {
  padding: 4px 14px;
  background: rgba(0, 102, 204, 0.08);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 50px;
}

@media (max-width: 768px) {
  .contact-form-wrapper {
    padding: 28px;
  }
  .contact-form-wrapper h2 {
    font-size: 24px;
  }
  .cases-detail-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .stat-item h3 {
    font-size: 28px;
  }
}

/* 图片 logo 样式 */
.navbar-brand .logo-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.footer-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  vertical-align: middle;
  margin-right: 6px;
}

/* 备案链接（统一全站） */
.beian-link {
  color: #A0A5AB;
  text-decoration: none;
  font-size: 0.8rem;
  transition: color 0.2s ease;
}
.beian-link:hover {
  color: #FFFFFF;
  text-decoration: underline;
}