/* iSeeMe · 知己者 - 首页样式 */

/* CSS 变量定义 */
:root {
  /* 主色调 - 蓝色科技系 */
  --primary-blue: #1a73e8;
  --primary-blue-light: #4285f4;
  --primary-blue-dark: #1557b0;
  --primary-blue-alpha: rgba(26, 115, 232, 0.1);
  
  /* 蓝色渐变系 */
  --gradient-primary: linear-gradient(135deg, #1a73e8 0%, #4285f4 100%);
  --gradient-hero: linear-gradient(135deg, #1557b0 0%, #1a73e8 50%, #4285f4 100%);
  --gradient-light: linear-gradient(135deg, #e8f0fe 0%, #f8f9ff 100%);
  
  /* 中性色系 */
  --neutral-white: #ffffff;
  --neutral-gray-50: #f8fafc;
  --neutral-gray-100: #f1f5f9;
  --neutral-gray-500: #64748b;
  --neutral-gray-600: #475569;
  --neutral-gray-800: #1e293b;
  --neutral-gray-900: #0f172a;
  
  /* 字体系统 */
  --font-family-primary: 'Inter', 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  
  /* 间距系统 */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* 圆角 */
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* 阴影 */
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
}

/* 全屏布局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family-primary);
  line-height: 1.6;
  color: var(--neutral-gray-800);
  background: var(--neutral-gray-50);
  overflow-x: hidden;
}

/* 全屏容器 */
.container {
  width: 100%;
  min-height: 100vh;
  background: var(--neutral-white);
  position: relative;
}

/* 顶部品牌栏 */
.brand-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(255, 255, 255);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  padding: var(--space-4) var(--space-6);
}

.brand-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
}

.brand-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.brand-logo {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-blue);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

/* 导航菜单整合到品牌栏 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin: 0;
  padding: 0;
  background: transparent;
  border: none;
  position: static;
}

/* 导航链接样式 */
.nav-link {
  color: var(--neutral-gray-600);
  text-decoration: none;
  font-weight: 500;
  font-size: 16px;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
  position: relative;
}

.nav-link:hover {
  color: var(--primary-blue);
  background: var(--primary-blue-alpha);
  transform: translateY(-1px);
}

/* 选中状态样式 */
.nav-link.active {
  color: var(--neutral-white);
  background: var(--primary-blue);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

.nav-link.active:hover {
  background: var(--primary-blue);
  color: var(--neutral-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(26, 115, 232, 0.4);
}

/* 英雄区域 - 全屏大气设计 */
.hero-section {
  background: var(--gradient-hero);
  color: var(--neutral-white);
  text-align: center;
  padding: var(--space-24) var(--space-4);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 700;
  margin-bottom: var(--space-6);
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: var(--space-4);
  font-weight: 300;
  opacity: 0.95;
}

.hero-description {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  margin-bottom: var(--space-12);
  opacity: 0.9;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

/* CTA 按钮组 */
.cta-buttons {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-8);
}

.btn-primary, .btn-secondary {
  padding: var(--space-4) var(--space-8);
  border: none;
  border-radius: var(--radius-xl);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 160px;
  justify-content: center;
}

.btn-primary {
  background: var(--neutral-white);
  color: var(--primary-blue);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  background: var(--neutral-gray-50);
}

.btn-secondary {
  background: transparent;
  color: var(--neutral-white);
  border: 2px solid var(--neutral-white);
}

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

/* 主内容区域 */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* 章节样式 */
.section-title {
  font-size: clamp(2rem, 5vw, 2.2rem);
  font-weight: 600;
  color: var(--primary-blue);
  text-align: left;
  margin-bottom: var(--space-12);
  position: relative;
  padding-top: 20px;
}

/* 特性网格 */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-16);
}

.feature-card {
  background: var(--neutral-white);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  text-align: center;
  border: 1px solid #e2e8f0;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.feature-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;
}

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

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-blue-alpha);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-6);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
  transition: transform 0.3s ease;
}

.feature-card:hover .feature-icon svg {
  transform: scale(1.1);
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-blue);
  margin-bottom: var(--space-4);
}

.feature-description {
  color: var(--neutral-gray-600);
  line-height: 1.7;
  font-size: 1.125rem;
}

/* 统计数据区域 */
.stats-section {
  background: var(--gradient-light);
  padding: var(--space-20) var(--space-4);
  margin: var(--space-20) 0;
}

.stats-container {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.stats-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 600;
  color: var(--primary-blue);
  margin-bottom: var(--space-12);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
}

.stat-item {
  background: var(--neutral-white);
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
}

.stat-number {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--primary-blue);
  display: block;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 1.125rem;
  color: var(--neutral-gray-600);
  font-weight: 500;
}

/* 角色展示样式 */
.role-showcase {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin: var(--space-8) 0;
  padding: var(--space-8);
  background: var(--gradient-light);
  border-radius: var(--radius-2xl);
  border: 1px solid rgba(26, 115, 232, 0.1);
}

.role-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--neutral-white);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.role-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(26, 115, 232, 0.05), transparent);
  transition: left 0.5s ease;
}

.role-item:hover::before {
  left: 100%;
}

.role-item:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-blue-alpha);
}

.role-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--primary-blue-alpha);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-blue);
  transition: all 0.3s ease;
}

.role-item:hover .role-icon {
  background: var(--primary-blue);
  color: var(--neutral-white);
  transform: scale(1.1);
}

.role-icon svg {
  width: 24px;
  height: 24px;
}

.role-content {
  flex: 1;
}

.role-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-blue);
  margin-bottom: var(--space-2);
  transition: color 0.3s ease;
}

.role-item:hover .role-title {
  color: var(--primary-blue-dark);
}

.role-desc {
  color: var(--neutral-gray-600);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0;
}

/* 引用样式 */
.quote {
  font-style: italic;
  color: var(--neutral-gray-600);
  border-left: 4px solid var(--primary-blue);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  line-height: 1.8;
  position: relative;
}

.quote::before {
  content: '"';
  font-size: 4rem;
  color: var(--primary-blue-alpha);
  position: absolute;
  left: -var(--space-4);
  top: -var(--space-4);
  font-family: Georgia, serif;
}

/* 文档网格 */
.documents-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}

.document-card {
  background: var(--neutral-white);
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all 0.3s ease;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}

.document-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--primary-blue-alpha), transparent);
  transition: left 0.6s ease;
}

.document-card:hover::before {
  left: 100%;
}

.document-card:hover {
  border-color: var(--primary-blue);
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.document-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-4);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
}

.document-icon svg {
  width: 100%;
  height: 100%;
  transition: transform 0.3s ease;
}

.document-card:hover .document-icon svg {
  transform: scale(1.1);
}

.document-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--primary-blue);
}

.document-description {
  font-size: 1rem;
  color: var(--neutral-gray-600);
  line-height: 1.6;
}

/* 联系区域 */
.contact-section {
  background: var(--gradient-hero);
  color: var(--neutral-white);
  padding: var(--space-20) var(--space-4);
  text-align: center;
  position: relative;
}

.contact-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  margin-bottom: 10px;
}

.contact-info {
  font-size: 1.25rem;
  margin: var(--space-3) 0;
  opacity: 0.95;
}

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

/* 滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  color: var(--neutral-white);
  opacity: 0.7;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* 响应式设计 */
@media (max-width: 768px) {
  .brand-header {
    padding: var(--space-3) var(--space-4);
  }
  
  .brand-content {
    flex-direction: row;
    gap: var(--space-3);
    align-items: center;
    justify-content: space-between;
  }
  
  .brand-left {
    gap: var(--space-2);
  }
  
  .brand-logo {
    width: 36px;
    height: 36px;
  }
  
  .brand-name {
    font-size: 1.125rem;
  }
  
  .nav-menu {
    gap: var(--space-2);
    flex-wrap: nowrap;
    width: auto;
    justify-content: flex-end;
  }
  
  .nav-link {
    padding: var(--space-2) var(--space-3);
    font-size: 14px;
  }

  .hero-section {
    padding: var(--space-16) var(--space-4);
    min-height: 70vh;
    padding-top: calc(var(--space-16) + 120px);
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
  }
  
  .btn-primary, .btn-secondary {
    width: 100%;
    max-width: 280px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }
  
  .documents-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  
  .role-showcase {
    grid-template-columns: 1fr;
    padding: var(--space-4);
    gap: var(--space-4);
  }
  
  .role-item {
    padding: var(--space-4);
    gap: var(--space-3);
  }
  
  .role-item:hover {
    transform: translateX(4px);
  }
  
  .role-icon {
    width: 40px;
    height: 40px;
  }
  
  .role-icon svg {
    width: 20px;
    height: 20px;
  }
  
  .role-title {
    font-size: 1.125rem;
  }
  
  .role-desc {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .brand-header {
    padding: var(--space-2) var(--space-3);
  }
  
  .brand-content {
    gap: var(--space-2);
  }
  
  .brand-left {
    gap: var(--space-1);
  }
  
  .brand-logo {
    width: 32px;
    height: 32px;
  }
  
  .brand-name {
    font-size: 1rem;
  }
  
  .nav-menu {
    gap: var(--space-1);
  }
  
  .nav-link {
    padding: var(--space-1) var(--space-2);
    font-size: 13px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}