/* ========================================
   贵州惠隆科技官网 - 科技感样式文件
   ======================================== */

/* CSS变量定义 - 科技感配色 */
:root {
  --primary: #00d4ff;
  --primary-dark: #0099cc;
  --primary-light: rgba(0, 212, 255, 0.1);
  --secondary: #7b2dff;
  --accent: #ff00ff;
  --text-dark: #0a0a1a;
  --text-gray: #8892b0;
  --text-light: #a8b2d1;
  --bg-dark: #0a0a1a;
  --bg-light: #0f0f23;
  --bg-card: rgba(15, 15, 35, 0.8);
  --border-color: rgba(0, 212, 255, 0.2);
  --glow-primary: rgba(0, 212, 255, 0.5);
  --glow-secondary: rgba(123, 45, 255, 0.5);
  --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 15px 60px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-light);
  background: var(--bg-dark);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

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

/* 科技感背景动画 */
.tech-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: var(--bg-dark);
  overflow: hidden;
}

.tech-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background:
    radial-gradient(circle at 20% 80%, var(--glow-secondary) 0%, transparent 25%),
    radial-gradient(circle at 80% 20%, var(--glow-primary) 0%, transparent 25%),
    radial-gradient(circle at 40% 40%, rgba(123, 45, 255, 0.1) 0%, transparent 30%);
  animation: bgMove 20s linear infinite;
}

@keyframes bgMove {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* 网格背景 */
.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image:
    linear-gradient(var(--border-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  animation: gridMove 30s linear infinite;
}

@keyframes gridMove {
  0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
  100% { transform: perspective(500px) rotateX(60deg) translateY(60px); }
}

/* 通用按钮样式 - 科技感发光按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  box-shadow:
    0 0 20px var(--glow-primary),
    0 0 40px rgba(0, 212, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow:
    0 0 30px var(--glow-primary),
    0 0 60px rgba(0, 212, 255, 0.3),
    0 10px 40px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  box-shadow:
    0 0 10px var(--glow-primary),
    inset 0 0 20px rgba(0, 212, 255, 0.1);
}

.btn-secondary:hover {
  background: var(--primary);
  color: var(--bg-dark);
  box-shadow: 0 0 30px var(--glow-primary);
}

/* 页面标题样式 */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 45, 255, 0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.section-title {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   导航栏样式 - 玻璃态导航
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 26, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(10, 10, 26, 0.95);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.1);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  box-shadow:
    0 0 20px var(--glow-primary),
    0 0 40px rgba(0, 212, 255, 0.2);
  animation: logoGlow 3s ease-in-out infinite;
}

@keyframes logoGlow {
  0%, 100% { box-shadow: 0 0 20px var(--glow-primary); }
  50% { box-shadow: 0 0 40px var(--glow-primary), 0 0 60px rgba(0, 212, 255, 0.3); }
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.logo-text span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 40px;
}

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

.nav-list a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: var(--transition);
  box-shadow: 0 0 10px var(--glow-primary);
}

.nav-list a:hover::before,
.nav-list a.active::before {
  width: 100%;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--primary);
  text-shadow: 0 0 20px var(--glow-primary);
}

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

.nav-phone {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  background: none;
  border: none;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  box-shadow: 0 0 10px var(--glow-primary);
}

/* ========================================
   Hero/Banner 区域 - 科技感主视觉
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  background: transparent;
  overflow: hidden;
}

/* 科技感线条动画 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(90deg, transparent 49.5%, var(--border-color) 49.5%, var(--border-color) 50.5%, transparent 50.5%),
    linear-gradient(0deg, transparent 49.5%, var(--border-color) 49.5%, var(--border-color) 50.5%, transparent 50.5%);
  background-size: 100px 100px;
  opacity: 0.15;
  animation: gridFade 4s ease-in-out infinite;
}

@keyframes gridFade {
  0%, 100% { opacity: 0.1; }
  50% { opacity: 0.2; }
}

/* 光晕效果 */
.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--glow-primary) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  opacity: 0.3;
  animation: pulseGlow 4s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
  50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text {
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  font-size: 14px;
  color: var(--primary);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary), 0 0 20px var(--glow-primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 0 40px rgba(0, 212, 255, 0.3);
}

.hero-title span {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero-title span::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 0 20px var(--glow-primary);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 40px;
}

.hero-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(15, 15, 35, 0.8);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  color: #fff;
  backdrop-filter: blur(10px);
  transition: var(--transition);
}

.hero-tag:hover {
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
  transform: translateY(-2px);
}

.hero-tag-icon {
  color: var(--primary);
  text-shadow: 0 0 10px var(--glow-primary);
}

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

.hero-visual {
  position: relative;
}

.hero-image-container {
  position: relative;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 45, 255, 0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(20px);
  box-shadow:
    0 0 40px rgba(0, 212, 255, 0.1),
    inset 0 0 60px rgba(0, 212, 255, 0.05);
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

.hero-float-card {
  position: absolute;
  background: rgba(15, 15, 35, 0.9);
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: floatCard 3s ease-in-out infinite;
}

@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero-float-card.top-left {
  top: -20px;
  left: -20px;
  animation-delay: 0s;
}

.hero-float-card.bottom-right {
  bottom: 40px;
  right: -30px;
  animation-delay: 1.5s;
}

.hero-float-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  box-shadow: 0 0 20px var(--glow-primary);
}

.hero-float-text {
  font-size: 14px;
}

.hero-float-title {
  font-weight: 600;
  color: #fff;
}

.hero-float-desc {
  color: var(--text-gray);
  font-size: 12px;
}

/* ========================================
   服务卡片区域 - 科技感卡片
   ======================================== */
.services {
  padding: 100px 0;
  background: transparent;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.service-card {
  position: relative;
  padding: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--glow-primary) 0%, var(--glow-secondary) 100%);
  opacity: 0;
  transition: var(--transition);
  z-index: -1;
}

.service-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--primary);
  box-shadow:
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 40px var(--glow-primary);
}

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

.service-card:hover::after {
  opacity: 0.05;
}

.service-icon {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(123, 45, 255, 0.2) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 32px;
  transition: var(--transition);
}

.service-card:hover .service-icon {
  box-shadow: 0 0 30px var(--glow-primary);
  transform: scale(1.1);
}

.service-card:nth-child(2) .service-icon { background: linear-gradient(135deg, rgba(255, 152, 0, 0.2) 0%, rgba(255, 87, 34, 0.2) 100%); }
.service-card:nth-child(3) .service-icon { background: linear-gradient(135deg, rgba(0, 200, 83, 0.2) 0%, rgba(0, 150, 136, 0.2) 100%); }
.service-card:nth-child(4) .service-icon { background: linear-gradient(135deg, rgba(233, 30, 99, 0.2) 0%, rgba(156, 39, 176, 0.2) 100%); }

.service-title {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.service-desc {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 20px;
}

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

.service-tag {
  padding: 6px 14px;
  font-size: 13px;
  color: var(--primary);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  transition: var(--transition);
}

.service-tag:hover {
  background: var(--primary);
  color: var(--bg-dark);
  box-shadow: 0 0 15px var(--glow-primary);
}

/* ========================================
   关于我们区域
   ======================================== */
.about-preview {
  padding: 100px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 212, 255, 0.02) 50%, transparent 100%);
}

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

.about-text h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
}

.about-text p {
  font-size: 16px;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.about-feature:hover {
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
  transform: translateX(5px);
}

.about-feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: 0 0 20px var(--glow-primary);
}

.about-feature-text h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.about-feature-text p {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 0;
}

.about-image {
  position: relative;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(10px);
  box-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.about-stat {
  text-align: center;
  padding: 20px;
  background: rgba(0, 212, 255, 0.05);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.about-stat:hover {
  border-color: var(--primary);
  box-shadow: 0 0 30px var(--glow-primary);
}

.about-stat-number {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

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

/* ========================================
   合作流程区域
   ======================================== */
.process {
  padding: 100px 0;
  background: transparent;
}

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

.process-step {
  position: relative;
  text-align: center;
  padding: 30px 15px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
}

.process-step::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--glow-primary) 0%, var(--glow-secondary) 100%);
  opacity: 0;
  transition: var(--transition);
}

.process-step:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3), 0 0 30px var(--glow-primary);
}

.process-step:hover::before {
  opacity: 0.1;
}

.process-step::after {
  content: '';
  position: absolute;
  top: 50%;
  right: -20px;
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: translateY(-50%);
}

.process-step:last-child::after {
  display: none;
}

.process-number {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  box-shadow: 0 0 30px var(--glow-primary);
  transition: var(--transition);
}

.process-step:hover .process-number {
  transform: scale(1.1);
  box-shadow: 0 0 50px var(--glow-primary);
}

.process-step:nth-child(2) .process-number { background: linear-gradient(135deg, #00bcd4 0%, #7b2dff 100%); }
.process-step:nth-child(3) .process-number { background: linear-gradient(135deg, #ff9800 0%, #ff00ff 100%); }
.process-step:nth-child(4) .process-number { background: linear-gradient(135deg, #4caf50 0%, #00d4ff 100%); }
.process-step:nth-child(5) .process-number { background: linear-gradient(135deg, #9c27b0 0%, #ff9800 100%); }
.process-step:nth-child(6) .process-number { background: linear-gradient(135deg, #e91e63 0%, #7b2dff 100%); }

.process-title {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.process-desc {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* ========================================
   案例展示区域
   ======================================== */
.cases-preview {
  padding: 100px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(123, 45, 255, 0.02) 50%, transparent 100%);
}

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

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.case-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 40px var(--glow-primary);
}

.case-image {
  height: 200px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(123, 45, 255, 0.2) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 60px;
  border-bottom: 1px solid var(--border-color);
}

.case-card:nth-child(2) .case-image {
  background: linear-gradient(135deg, rgba(0, 200, 83, 0.2) 0%, rgba(0, 150, 136, 0.2) 100%);
}

.case-card:nth-child(3) .case-image {
  background: linear-gradient(135deg, rgba(255, 152, 0, 0.2) 0%, rgba(255, 87, 34, 0.2) 100%);
}

.case-content {
  padding: 24px;
}

.case-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 12px;
  color: var(--primary);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  margin-bottom: 12px;
}

.case-title {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
}

.case-desc {
  font-size: 14px;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ========================================
   FAQ区域
   ======================================== */
.faq-preview {
  padding: 100px 0;
  background: transparent;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 20px var(--glow-primary);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  transition: var(--transition);
}

.faq-question:hover {
  background: rgba(0, 212, 255, 0.05);
}

.faq-question h4 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
}

.faq-icon {
  font-size: 20px;
  color: var(--primary);
  transition: var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  text-shadow: 0 0 20px var(--glow-primary);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 24px 20px;
  max-height: 200px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.8;
}

/* ========================================
   联系我们区域
   ======================================== */
.contact {
  padding: 100px 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 45, 255, 0.1) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, var(--glow-primary) 0%, transparent 30%),
              radial-gradient(circle at 70% 50%, var(--glow-secondary) 0%, transparent 30%);
  opacity: 0.3;
  animation: contactGlow 10s ease-in-out infinite;
}

@keyframes contactGlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(2%, 2%); }
}

.contact .section-tag {
  background: rgba(0, 212, 255, 0.2);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

.contact .section-title {
  color: #fff;
}

.contact .section-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 60px;
  position: relative;
  z-index: 1;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.contact-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2) 0%, rgba(123, 45, 255, 0.2) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
  transition: var(--transition);
}

.contact-item:hover .contact-icon {
  border-color: var(--primary);
  box-shadow: 0 0 30px var(--glow-primary);
  transform: scale(1.1);
}

.contact-text h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.contact-text p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.8);
}

.contact-form {
  background: rgba(15, 15, 35, 0.9);
  border: 1px solid var(--border-color);
  padding: 40px;
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  box-shadow: 0 0 60px rgba(0, 212, 255, 0.1);
}

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

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-family: inherit;
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--glow-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.contact-form .btn {
  width: 100%;
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-gray);
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

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

.footer-links a:hover {
  color: var(--primary);
  text-shadow: 0 0 20px var(--glow-primary);
  padding-left: 5px;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  font-size: 14px;
  color: var(--text-gray);
}

/* ========================================
   内页通用样式
   ======================================== */
.page-header {
  padding-top: 120px;
  padding-bottom: 60px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(123, 45, 255, 0.1) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    linear-gradient(90deg, transparent 49.5%, var(--border-color) 49.5%, var(--border-color) 50.5%, transparent 50.5%),
    linear-gradient(0deg, transparent 49.5%, var(--border-color) 49.5%, var(--border-color) 50.5%, transparent 50.5%);
  background-size: 50px 50px;
  opacity: 0.1;
}

.page-header h1 {
  font-size: 42px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.page-header p {
  font-size: 18px;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-content {
  padding: 80px 0;
}

/* ========================================
   关于页面
   ======================================== */
.about-full {
  background: transparent;
}

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 100px;
}

.about-intro-content h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 24px;
}

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

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 100px;
}

.value-card {
  text-align: center;
  padding: 40px 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.value-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), 0 0 40px var(--glow-primary);
}

.value-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: #fff;
  margin: 0 auto 24px;
  box-shadow: 0 0 30px var(--glow-primary);
  transition: var(--transition);
}

.value-card:hover .value-icon {
  transform: scale(1.1);
  box-shadow: 0 0 50px var(--glow-primary);
}

.value-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

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

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text {
    max-width: 100%;
  }

  .hero-tags {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    display: none;
  }

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

  .about-content,
  .about-intro {
    grid-template-columns: 1fr;
  }

  .about-image {
    order: -1;
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-step::after {
    display: none;
  }

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

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

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-list {
    display: none;
  }

  .nav-contact {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

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

  .section-title {
    font-size: 28px;
  }

  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* 选中文字样式 */
::selection {
  background: var(--primary);
  color: var(--bg-dark);
}