/* ===== CSS 变量与全局样式 ===== */
:root {
  --primary: #0ea5e9;
  --primary-light: #38bdf8;
  --primary-dark: #0284c7;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --bg: #f8fafc;
  --card-bg: rgba(255, 255, 255, 0.85);
  --text-dark: #1e293b;
  --text-muted: #64748b;
  --text-light: #475569;
  --border-color: #e2e8f0;
  --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #8b5cf6 100%);
  --gradient-secondary: linear-gradient(135deg, #38bdf8 0%, #c084fc 100%);
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.15);
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg);
  background-image:
    radial-gradient(at 0% 0%, rgba(14, 165, 233, 0.08) 0px, transparent 50%),
    radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.08) 0px, transparent 50%);
  position: relative;
}

/* ===== 容器和布局 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ===== 头部导航 ===== */
.site-header {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  color: var(--text-dark);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.brand {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.5px;
  flex-shrink: 0;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

.nav a:hover::after {
  width: 100%;
}

.nav-cta {
  background: var(--gradient-primary) !important;
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 24px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
  -webkit-background-clip: unset !important;
  -webkit-text-fill-color: unset !important;
  background-clip: unset !important;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(14, 165, 233, 0.3);
}

/* ===== Hero Section ===== */
.hero {
  background: linear-gradient(135deg, #f0f9ff 0%, #faf5ff 100%);
  position: relative;
  padding: 100px 0 120px;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

/* 科技感背景网格/点阵效果 */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(90deg, rgba(14, 165, 233, 0.05) 1px, transparent 1px),
    linear-gradient(0deg, rgba(139, 92, 246, 0.05) 1px, transparent 1px);
  background-size: 50px 50px;
  opacity: 1;
  z-index: 0;
}

@keyframes gridMove {
  0% {
    transform: translate(0, 0);
  }
  100% {
    transform: translate(50px, 50px);
  }
}

/* 科技感圆形装饰 */
.hero::after {
  content: "";
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.15) 0%,
    transparent 70%
  );
  border-radius: 50%;
  z-index: 0;
  animation: floatGlow 6s ease-in-out infinite;
}

@keyframes floatGlow {
  0%,
  100% {
    transform: translate(0, 0);
    opacity: 0.5;
  }
  50% {
    transform: translate(20px, -20px);
    opacity: 0.8;
  }
}

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

.hero-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero h2 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

@keyframes titleGlow {
  0%,
  100% {
    filter: drop-shadow(0 0 20px rgba(14, 165, 233, 0.3));
  }
  50% {
    filter: drop-shadow(0 0 30px rgba(14, 165, 233, 0.5));
  }
}

.hero p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.5s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(14, 165, 233, 0.4);
}

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

/* ===== Section 通用样式 ===== */
.section {
  padding: 60px 0;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

/* 为 id 为 about 的 section 添加背景 */
#about {
  background: #ffffff;
}

/* 为 id 为 services 的 section 添加背景 */
#services {
  background: linear-gradient(135deg, #fefcff 0%, #fef9ff 100%);
  position: relative;
}

#services::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(
      circle at 20% 30%,
      rgba(14, 165, 233, 0.08) 0%,
      transparent 40%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(139, 92, 246, 0.08) 0%,
      transparent 40%
    );
  pointer-events: none;
  z-index: 0;
}

/* 为 id 为 scope 的 section 添加背景 */
#scope {
  background: linear-gradient(135deg, #f0fdf4 0%, #f0f9ff 100%);
}

/* 为 id 为 dev 的 section 添加背景 */
#dev {
  background: #ffffff;
}

/* 为 id 为 process 的 section 添加背景 */
#process {
  background: linear-gradient(135deg, #faf5ff 0%, #fef9ff 100%);
  position: relative;
}

#process::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(90deg, rgba(14, 165, 233, 0.04) 1px, transparent 1px),
    linear-gradient(0deg, rgba(139, 92, 246, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* 为 id 为 cases 的 section 添加背景 */
#cases {
  background: linear-gradient(135deg, #f0f9ff 0%, #fefcff 100%);
}

.section h3 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 40px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  position: relative;
  display: inline-block;
  width: 100%;
}

/* 为 section 标题添加装饰线 */
.section h3::after {
  content: "";
  display: block;
  width: 80px;
  height: 3px;
  background: var(--gradient-primary);
  margin: 12px auto 0;
  border-radius: 2px;
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.3);
}

/* ===== About Card ===== */
.about-card {
  background: var(--card-bg);
  padding: 32px;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(14, 165, 233, 0.15);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.about-card:hover {
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
  border-color: rgba(14, 165, 233, 0.3);
  transform: translateY(-4px);
}

.about-card::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
  pointer-events: none;
  animation: float 6s ease-in-out infinite;
}

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

.about-card p {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
  color: var(--text-dark);
  position: relative;
  z-index: 1;
}

.about-card p:last-child {
  margin-bottom: 0;
}

/* ===== 服务优势 (Feature Grid) ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  position: relative;
  z-index: 1;
}

.feature-item {
  background: var(--card-bg);
  padding: 24px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
  border: 1px solid rgba(14, 165, 233, 0.1);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

/* 为 feature item 添加渐变边框效果 */
.feature-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.25);
}

.feature-item:hover::before {
  opacity: 1;
}

.feature-item h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ===== 业务范围 (Business Grid) ===== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  position: relative;
  z-index: 1;
}

.business-item {
  background: var(--card-bg);
  padding: 28px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--primary);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

/* 背景装饰 */
.business-item::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 120px;
  height: 120px;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
  transition: all 0.3s ease;
}

.business-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-left-color: var(--primary-light);
}

.business-item:hover::before {
  width: 150px;
  height: 150px;
  top: -70px;
  right: -70px;
}

.business-item h4 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.business-item ul {
  list-style: none;
  padding: 0;
}

.business-item li {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
  padding-left: 20px;
  position: relative;
}

.business-item li:before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

.business-item li:last-child {
  margin-bottom: 0;
}

/* ===== 服务流程 (Timeline) ===== */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  margin-top: 60px;
  position: relative;
  z-index: 1;
}

.process-timeline::before {
  content: "";
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 3px;
  background: linear-gradient(90deg,
    var(--primary) 0%,
    var(--secondary) 50%,
    var(--primary) 100%
  );
  z-index: -1;
  opacity: 0.5;
  box-shadow: 0 0 20px rgba(14, 165, 233, 0.3);
}

.process-step {
  text-align: center;
  padding: 32px 20px;
  background: var(--card-bg);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  border: 2px solid transparent;
  backdrop-filter: blur(10px);
}

.process-step::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--gradient-primary);
  border-radius: 20px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.process-step:hover {
  transform: translateY(-12px) scale(1.05);
  box-shadow: 0 20px 60px -10px rgba(14, 165, 233, 0.4);
}

.process-step:hover::after {
  opacity: 1;
}

.process-step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.4);
  transition: all 0.4s ease;
  position: relative;
}

.process-step span::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  background: linear-gradient(
    135deg,
    rgba(14, 165, 233, 0.3),
    rgba(139, 92, 246, 0.3)
  );
  z-index: -1;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.7;
  }
}

.process-step:hover span {
  transform: scale(1.15) rotate(10deg);
  box-shadow: 0 12px 40px rgba(14, 165, 233, 0.6);
}

.process-step p {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.5px;
}

/* ===== 成功案例 (Case List) ===== */
.case-list {
  list-style: none;
  padding: 0;
  max-width: 900px;
  margin: 0 auto;
}

.case-list li {
  background: var(--card-bg);
  padding: 20px 24px;
  margin-bottom: 16px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--primary);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dark);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.case-list li::before {
  content: "";
  position: absolute;
  top: 0;
  right: -100px;
  width: 200px;
  height: 100%;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.08) 0%,
    transparent 70%
  );
  transition: right 0.3s ease;
}

.case-list li:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
  border-left-color: var(--primary-light);
}

.case-list li:last-child {
  margin-bottom: 0;
}

/* ===== 核心业务卡片 ===== */
.business-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
  margin-top: 40px;
}

.business-card {
  background: var(--card-bg);
  padding: 40px 32px;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(14, 165, 233, 0.15);
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.business-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.business-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.2);
  border-color: rgba(14, 165, 233, 0.3);
}

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

.business-icon {
  font-size: 48px;
  margin-bottom: 20px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.business-card h4 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.business-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
}

.card-link {
  display: inline-block;
  color: var(--primary);
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
}

.card-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.3s ease;
}

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

.card-link:hover::after {
  width: 100%;
}

/* ===== CTA 区域 ===== */
.cta-box {
  background: var(--card-bg);
  padding: 60px 40px;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  border: 2px solid rgba(14, 165, 233, 0.2);
  text-align: center;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.cta-box::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(14, 165, 233, 0.1) 0%,
    transparent 70%
  );
  animation: rotate 20s linear infinite;
}

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

.cta-box h3 {
  font-size: 32px;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-box h3::after {
  display: none;
}

.cta-box p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

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

/* ===== 页面 Hero ===== */
.page-hero {
  background: linear-gradient(135deg, #f0f9ff 0%, #faf5ff 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  border-bottom: 1px solid var(--border-color);
}

.page-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(90deg, rgba(14, 165, 233, 0.04) 1px, transparent 1px),
    linear-gradient(0deg, rgba(139, 92, 246, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 1;
  z-index: 0;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero h2 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-hero p {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 800px;
  margin: 0 auto;
}

/* ===== 服务详情 ===== */
.service-detail {
  max-width: 900px;
  margin: 0 auto;
}

.service-content {
  background: var(--card-bg);
  padding: 40px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(14, 165, 233, 0.1);
  backdrop-filter: blur(10px);
}

.service-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-list li {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dark);
  margin-bottom: 20px;
  padding-left: 32px;
  position: relative;
}

.service-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
  font-size: 20px;
}

.service-list li:last-child {
  margin-bottom: 0;
}

.service-intro {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dark);
  margin: 0;
}

/* ===== 开发服务卡片 ===== */
.dev-services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.dev-service-card {
  background: var(--card-bg);
  padding: 32px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(14, 165, 233, 0.1);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.dev-service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.dev-service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.25);
}

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

.service-number {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.dev-service-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-dark);
  line-height: 1.4;
}

.dev-service-card .service-intro {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ===== 技术栈 ===== */
.tech-stack {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.tech-category {
  background: var(--card-bg);
  padding: 28px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(14, 165, 233, 0.1);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
}

.tech-category:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.25);
}

.tech-category h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tech-tag {
  display: inline-block;
  padding: 8px 16px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-dark);
  transition: all 0.3s ease;
}

.tech-tag:hover {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2) 0%, rgba(139, 92, 246, 0.2) 100%);
  border-color: rgba(14, 165, 233, 0.4);
  transform: translateY(-2px);
}

/* ===== 案例网格 ===== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
}

.case-card {
  background: var(--card-bg);
  padding: 32px;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(14, 165, 233, 0.15);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.case-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.2);
  border-color: rgba(14, 165, 233, 0.3);
}

.case-card:hover::before {
  transform: scaleY(1);
}

.case-number {
  font-size: 48px;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 20px;
  opacity: 0.8;
}

.case-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-dark);
  line-height: 1.4;
}

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

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

.case-tag {
  display: inline-block;
  padding: 6px 14px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dark);
}

/* ===== 联系页面 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 40px;
  max-width: 1100px;
  margin: 0 auto;
}

.contact-info h3,
.contact-form-wrapper h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.info-items {
  background: var(--card-bg);
  padding: 32px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(14, 165, 233, 0.1);
  backdrop-filter: blur(10px);
  margin-bottom: 24px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.info-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.info-icon {
  font-size: 32px;
  line-height: 1;
  flex-shrink: 0;
}

.info-content h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.info-content p {
  font-size: 16px;
  color: var(--text-dark);
  font-weight: 500;
}

.service-highlight {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.08) 0%, rgba(139, 92, 246, 0.08) 100%);
  padding: 24px;
  border-radius: 12px;
  border: 1px solid rgba(14, 165, 233, 0.15);
}

.service-highlight p {
  font-size: 15px;
  color: var(--text-dark);
  margin-bottom: 12px;
  font-weight: 500;
}

.service-highlight p:last-child {
  margin-bottom: 0;
}

.contact-form-wrapper {
  background: var(--card-bg);
  padding: 32px;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(14, 165, 233, 0.1);
  backdrop-filter: blur(10px);
}

.contact-form {
  margin-top: 24px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-dark);
  background: #fff;
  transition: all 0.3s ease;
}

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

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

.contact-form .btn {
  width: 100%;
  padding: 14px 32px;
  font-size: 16px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: linear-gradient(135deg, #f0f9ff 0%, #faf5ff 100%);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 40px 0;
  text-align: center;
  margin-top: 60px;
  position: relative;
  overflow: hidden;
}

/* 页脚背景网格效果 */
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(90deg, rgba(14, 165, 233, 0.04) 1px, transparent 1px),
    linear-gradient(0deg, rgba(139, 92, 246, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 1;
  pointer-events: none;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

.site-footer p {
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 8px;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .hero h2 {
    font-size: 36px;
  }

  .section h3 {
    font-size: 28px;
    margin-bottom: 30px;
  }

  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .process-step {
    padding: 16px 12px;
  }

  .process-step span {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .process-step p {
    font-size: 12px;
  }
}

@media (max-width: 768px) {
  .nav {
    gap: 16px;
  }

  .nav a {
    font-size: 13px;
  }

  .nav-cta {
    padding: 6px 12px !important;
    font-size: 13px !important;
  }

  .hero {
    padding: 60px 0;
  }

  .hero h2 {
    font-size: 28px;
    margin-bottom: 12px;
  }

  .hero p {
    font-size: 16px;
    margin-bottom: 24px;
  }

  .section {
    padding: 48px 0;
  }

  .section h3 {
    font-size: 24px;
    margin-bottom: 24px;
  }

  .feature-grid,
  .business-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-item,
  .business-item {
    padding: 20px;
  }

  .business-item h4 {
    font-size: 18px;
  }

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

  .case-list li {
    padding: 16px;
    font-size: 14px;
  }

  .about-card {
    padding: 20px;
  }

  .about-card p {
    font-size: 15px;
  }
}

@media (max-width: 480px) {
  .header-container {
    flex-wrap: wrap;
    padding: 12px;
  }

  .brand {
    font-size: 18px;
  }

  .nav {
    width: 100%;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
  }

  .nav a {
    font-size: 12px;
    padding: 4px 8px;
  }

  .hero {
    padding: 40px 0;
  }

  .hero h2 {
    font-size: 22px;
  }

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

  .btn {
    padding: 10px 24px;
    font-size: 14px;
  }

  .section {
    padding: 32px 0;
  }

  .section h3 {
    font-size: 20px;
    margin-bottom: 20px;
  }

  .feature-item h4,
  .business-item h4 {
    font-size: 16px;
  }

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

  .process-step span {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .site-footer {
    padding: 24px 0;
  }

  .site-footer p {
    font-size: 12px;
  }
}