/* mirror_flow:p6_ai_generated */
/* ===== CSS Variables ===== */
:root {
  /* 主色调 - 科技蓝 */
  --primary: #1a5f8a;
  --primary-light: #2980b9;
  --primary-dark: #0d3b5c;
  --primary-bg: #e8f4fd;
  
  /* 辅助色 */
  --accent: #e67e22;
  --accent-light: #f0a04b;
  --accent-dark: #c96a1a;
  
  /* 中性色 */
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-light: #a0aec0;
  
  /* 背景色 */
  --bg-white: #ffffff;
  --bg-light: #f7f9fc;
  --bg-gray: #edf2f7;
  --bg-dark: #2d3748;
  --bg-footer: #1a202c;
  
  /* 边框 */
  --border-light: #e2e8f0;
  --border-medium: #cbd5e0;
  
  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 50px rgba(0,0,0,0.15);
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 50%;
  
  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Noto Serif SC", "SimSun", "Times New Roman", serif;
  
  /* 字号 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  
  /* 间距 */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* 容器 */
  --container-max: 1200px;
  --container-narrow: 900px;
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 导航高度 */
  --nav-height: 72px;
  --nav-height-mobile: 60px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.4;
  font-weight: 700;
  color: var(--text-primary);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-md);
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  outline: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* ===== Utility Classes ===== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--space-4xl) 0;
}

.section--gray {
  background-color: var(--bg-light);
}

.section--primary {
  background-color: var(--primary-dark);
  color: #ffffff;
}

.section__title {
  text-align: center;
  margin-bottom: var(--space-2xl);
  position: relative;
}

.section__title h2 {
  font-size: var(--text-3xl);
  margin-bottom: var(--space-sm);
}

.section__title p {
  color: var(--text-muted);
  font-size: var(--text-lg);
  max-width: 600px;
  margin: 0 auto;
}

.section__title--light h2 {
  color: #ffffff;
}

.section__title--light p {
  color: rgba(255,255,255,0.8);
}

.section__title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--primary);
  margin: var(--space-md) auto 0;
  border-radius: 2px;
}

.section__title--light::after {
  background: var(--accent);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

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

.btn--primary:hover {
  background: var(--primary-light);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--accent {
  background: var(--accent);
  color: #ffffff;
}

.btn--accent:hover {
  background: var(--accent-light);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn--outline:hover {
  background: var(--primary);
  color: #ffffff;
}

.btn--outline-light {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255,255,255,0.6);
}

.btn--outline-light:hover {
  background: #ffffff;
  color: var(--primary-dark);
  border-color: #ffffff;
}

.btn--lg {
  padding: 14px 36px;
  font-size: var(--text-lg);
}

.btn--sm {
  padding: 8px 20px;
  font-size: var(--text-sm);
}

/* ===== Header / Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition-base);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.header__logo img {
  height: 40px;
  width: auto;
}

.header__logo-text {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--primary-dark);
  white-space: nowrap;
}

.header__logo-text span {
  color: var(--primary);
}

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

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  display: block;
  padding: var(--space-sm) 0;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: var(--text-base);
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform var(--transition-fast);
  border-radius: 1px;
}

.nav__link:hover,
.nav__link--active {
  color: var(--primary);
}

.nav__link:hover::after,
.nav__link--active::after {
  transform: scaleX(1);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
  overflow: hidden;
  margin-top: var(--nav-height);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  color: #ffffff;
  max-width: 700px;
}

.hero__subtitle {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-lg);
  letter-spacing: 0.05em;
  backdrop-filter: blur(4px);
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-lg);
  color: #ffffff;
  letter-spacing: 0.02em;
}

.hero__title span {
  color: var(--accent);
}

.hero__desc {
  font-size: var(--text-lg);
  line-height: 1.8;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--space-xl);
  max-width: 560px;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero__image {
  position: absolute;
  right: 0;
  bottom: 0;
  max-width: 45%;
  z-index: 1;
  opacity: 0.9;
}

/* ===== Features / Services Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  text-align: center;
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  border-radius: 0 0 2px 2px;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

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

.feature-card__icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: var(--primary-bg);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--primary);
  transition: all var(--transition-base);
}

.feature-card:hover .feature-card__icon {
  background: var(--primary);
  color: #ffffff;
  transform: scale(1.1);
}

.feature-card h3 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  line-height: 1.8;
  margin-bottom: 0;
}

/* ===== About Section ===== */
.about {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about__image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.about__image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.about__image::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid var(--primary);
  border-radius: var(--radius-lg);
  transform: translate(12px, 12px);
  z-index: -1;
  transition: transform var(--transition-base);
}

.about__content h2 {
  margin-bottom: var(--space-lg);
}

.about__content p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  line-height: 1.9;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.about__stat {
  text-align: center;
  padding: var(--space-md);
  background: var(--bg-light);
  border-radius: var(--radius-md);
}

.about__stat-number {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.about__stat-label {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* ===== Services Detail Grid ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.service-card