/* ============================================
   星亦科技 - 企业官网样式表
   主色调：靛蓝 #4F46E5 / 辅助色 #7C3AED
   ============================================ */

/* ---------- 基础重置 ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #4F46E5;
  --primary-dark: #3730A3;
  --primary-light: #818CF8;
  --accent: #7C3AED;
  --bg: #FFFFFF;
  --bg-alt: #F8FAFC;
  --bg-dark: #0F172A;
  --text: #1E293B;
  --text-light: #64748B;
  --text-white: #F8FAFC;
  --border: #E2E8F0;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --transition: all 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* ---------- 通用容器 ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-alt);
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-white);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.section-dark .section-title h2 {
  color: var(--text-white);
}

.section-title p {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section-dark .section-title p {
  color: #94A3B8;
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.navbar-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  font-weight: 800;
}

.navbar-nav {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.navbar-nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

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

.navbar-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 1px;
  transition: var(--transition);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-align: center;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: 0 4px 14px rgba(79,70,229,0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79,70,229,0.5);
  color: white;
}

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

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

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

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--primary);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
}

/* ---------- Hero 区域 ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 72px;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 50%, #EDE9FE 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(124,58,237,0.06) 0%, transparent 70%);
  border-radius: 50%;
}

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

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--bg-dark);
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--text-light);
  margin-bottom: 40px;
  line-height: 1.8;
}

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

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-graphic {
  width: 100%;
  max-width: 500px;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  padding: 40px;
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.hero-graphic::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
}

.hero-graphic .code-lines {
  width: 100%;
  max-width: 300px;
  position: relative;
  z-index: 1;
}

.hero-graphic .code-line {
  height: 12px;
  border-radius: 6px;
  margin-bottom: 10px;
  background: rgba(255,255,255,0.2);
}

.hero-graphic .code-line:nth-child(1) { width: 60%; }
.hero-graphic .code-line:nth-child(2) { width: 80%; }
.hero-graphic .code-line:nth-child(3) { width: 45%; }
.hero-graphic .code-line:nth-child(4) { width: 70%; }
.hero-graphic .code-line:nth-child(5) { width: 55%; }
.hero-graphic .code-line:nth-child(6) { width: 90%; }
.hero-graphic .code-line:nth-child(7) { width: 40%; }

.hero-graphic .code-line.accent {
  background: rgba(255,255,255,0.4);
}

/* ---------- 数字指标 ---------- */
.stats {
  padding: 60px 0;
  background: var(--bg-dark);
}

.stats .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item h3 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary-light);
  margin-bottom: 8px;
}

.stat-item p {
  color: #94A3B8;
  font-size: 0.95rem;
}

/* ---------- 服务卡片 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.service-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

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

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(124,58,237,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 24px;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}

.service-card p {
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-card .learn-more {
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.service-card .learn-more::after {
  content: '→';
  transition: transform 0.2s;
}

.service-card:hover .learn-more::after {
  transform: translateX(4px);
}

/* ---------- 案例展示 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 30px;
}

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

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

.case-image {
  height: 220px;
  background: linear-gradient(135deg, #E0E7FF, #EDE9FE);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.case-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(15,23,42,0.03));
}

.case-body {
  padding: 28px;
}

.case-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(79,70,229,0.1);
  color: var(--primary);
  margin-bottom: 12px;
}

.case-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.case-body p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 关于我们 ---------- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 20px;
}

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

.about-visual {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg);
  padding: 48px;
  color: white;
  position: relative;
  overflow: hidden;
}

.about-visual::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -30%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.about-visual .milestone {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.about-visual .milestone-year {
  font-size: 1.5rem;
  font-weight: 800;
  white-space: nowrap;
  min-width: 60px;
}

.about-visual .milestone-desc {
  font-size: 0.95rem;
  opacity: 0.9;
  line-height: 1.6;
}

/* ---------- 团队 ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 30px;
}

.team-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

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

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(124,58,237,0.1));
}

.team-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.team-card .role {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.team-card p {
  color: var(--text-light);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ---------- 联系页面 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info {
  padding: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-lg);
  color: white;
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

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

.contact-item .icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item .label {
  font-size: 0.85rem;
  opacity: 0.8;
  margin-bottom: 2px;
}

.contact-item .value {
  font-weight: 600;
}

.contact-form {
  padding: 48px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.contact-form h3 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  background: var(--bg);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

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

/* ---------- CTA 区域 ---------- */
.cta {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  text-align: center;
  color: white;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -20%;
  width: 600px;
  height: 600px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.cta h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-dark);
  color: var(--text-white);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
  margin-bottom: 16px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
  font-weight: 800;
}

.footer-desc {
  color: #94A3B8;
  line-height: 1.7;
  font-size: 0.9rem;
  margin-bottom: 20px;
}

.footer h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-white);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.footer-bottom {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: #64748B;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: #64748B;
  font-size: 0.85rem;
}

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

/* ---------- 页面顶部横幅 ---------- */
.page-banner {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 50%, #EDE9FE 100%);
  text-align: center;
}

.page-banner h1 {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--bg-dark);
}

.page-banner p {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 0.9rem;
  color: var(--text-light);
}

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

.breadcrumb span {
  color: var(--text-light);
}

/* ---------- 特色列表 ---------- */
.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--text-light);
  line-height: 1.6;
}

.feature-list .check {
  color: var(--primary);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ---------- 服务详情 ---------- */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
}

.service-detail:last-child {
  border-bottom: none;
}

.service-detail:nth-child(even) .service-detail-visual {
  order: -1;
}

.service-detail-visual {
  background: linear-gradient(135deg, #EEF2FF, #EDE9FE);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  font-size: 4rem;
}

.service-detail-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-detail-content p {
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

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

  .hero-content h1 {
    font-size: 2.75rem;
  }

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

  .hero-visual {
    display: none;
  }

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

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

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

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

  .service-detail {
    grid-template-columns: 1fr;
  }

  .service-detail:nth-child(even) .service-detail-visual {
    order: 0;
  }
}

@media (max-width: 768px) {
  .navbar-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
  }

  .navbar-nav.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2.25rem;
  }

  .hero-content p {
    font-size: 1.05rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-title h2 {
    font-size: 1.75rem;
  }

  .page-banner {
    padding: 120px 0 60px;
  }

  .page-banner h1 {
    font-size: 2rem;
  }

  .stats .container {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .stat-item h3 {
    font-size: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

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

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

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.875rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .stats .container {
    grid-template-columns: 1fr;
  }

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

/* ---------- 动画 ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }