/* ============================================
   File: site4-creative/css/style.css
   Agent: @frontenddev
   Task: T6 - 前端开发
   Created: 2026-03-18
   
   Site 4 - 艺术风 CSS 样式
   配色：黑 + 荧光绿 + 紫 (#FF2E63 主色)
   特点：前卫、实验性、视觉冲击
   ============================================ */

:root {
  /* 配色方案 */
  --color-primary: #FF2E63;
  --color-primary-dark: #D91E4E;
  --color-primary-light: #FF5C8D;
  --color-secondary: #08D9D6;
  --color-accent: #FFD93D;
  
  --color-bg-primary: #1A1A2E;
  --color-bg-secondary: #16213E;
  --color-bg-card: #0F3460;
  
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #E8E8E8;
  --color-text-muted: #A0A0A0;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, #FFA500 100%);
  
  /* 字体 */
  --font-family-base: 'PingFang SC', 'Microsoft YaHei', 'Arial', sans-serif;
  --font-family-display: 'Impact', 'Arial Black', sans-serif;
  
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2.5rem;
  --font-size-3xl: 4rem;
  
  /* 间距系统 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* 圆角 */
  --radius-sm: 0px;
  --radius-md: 4px;
  --radius-lg: 12px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
  --shadow-neon: 0 0 10px var(--color-primary), 0 0 20px var(--color-primary);
  --shadow-neon-cyan: 0 0 10px var(--color-secondary), 0 0 20px var(--color-secondary);
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-base: 0.4s ease;
  --transition-slow: 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* 布局 */
  --container-max: 1400px;
  --header-height: 80px;
}

/* ============================================
   基础重置
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  overflow-x: hidden;
}

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

a:hover {
  color: var(--color-secondary);
}

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

ul, ol {
  list-style: none;
}

/* ============================================
   通用组件
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-2xl);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
  letter-spacing: 6px;
}

.btn {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-2xl);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

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

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  transition: left var(--transition-base);
  z-index: -1;
}

.btn-primary:hover::before {
  left: 0;
}

.btn-primary:hover {
  color: var(--color-text-primary);
  box-shadow: var(--shadow-neon);
}

/* ============================================
   头部导航
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(26, 26, 46, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  z-index: 1000;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: var(--spacing-2xl);
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all var(--transition-fast);
  position: relative;
}

.nav-links a::before {
  content: '[';
  margin-right: 4px;
  opacity: 0;
  color: var(--color-secondary);
  transition: opacity var(--transition-fast);
}

.nav-links a::after {
  content: ']';
  margin-left: 4px;
  opacity: 0;
  color: var(--color-secondary);
  transition: opacity var(--transition-fast);
}

.nav-links a:hover::before,
.nav-links a:hover::after {
  opacity: 1;
}

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

/* ============================================
   Hero 区域
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255, 46, 99, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 80% 50%, rgba(8, 217, 214, 0.15) 0%, transparent 40%);
  animation: rotate 30s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

.hero-content {
  max-width: 800px;
  padding: var(--spacing-xl);
}

.hero-title {
  font-family: var(--font-family-display);
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
  letter-spacing: 10px;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-2xl);
  font-weight: 300;
  letter-spacing: 4px;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   作品网格（不对称布局）
   ============================================ */

.works {
  background: var(--color-bg-secondary);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 280px;
  gap: var(--spacing-lg);
}

.work-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
}

.work-card.large {
  grid-column: span 2;
}

.work-card.tall {
  grid-row: span 2;
}

.work-image {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-primary-dark) 100%);
  transition: transform var(--transition-slow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
}

.work-card:hover .work-image {
  transform: scale(1.1);
}

.work-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-xl);
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.9));
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.work-card:hover .work-info {
  transform: translateY(0);
}

.work-info h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.work-info p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ============================================
   设计理念
   ============================================ */

.philosophy {
  background: var(--color-bg-primary);
}

.philosophy-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.philosophy-content h3 {
  font-family: var(--font-family-display);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
}

.philosophy-content p {
  color: var(--color-text-secondary);
  line-height: 2;
  margin-bottom: var(--spacing-lg);
}

.philosophy-visual {
  height: 400px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem;
  box-shadow: var(--shadow-neon);
}

/* ============================================
   团队展示
   ============================================ */

.team {
  background: var(--color-bg-secondary);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.team-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-align: center;
  transition: all var(--transition-base);
}

.team-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-neon);
}

.team-image {
  height: 280px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
}

.team-info {
  padding: var(--spacing-xl);
}

.team-info h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

.team-info p {
  color: var(--color-primary-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-md);
}

.team-social {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
}

.team-social a {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
}

.team-social a:hover {
  background: var(--color-primary);
  color: white;
}

/* ============================================
   联系区域
   ============================================ */

.contact {
  background: var(--color-bg-primary);
}

.contact-wrapper {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-item {
  padding: var(--spacing-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-item:last-child {
  border-bottom: none;
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.contact-label {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-xs);
}

.contact-value {
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
}

/* ============================================
   页脚
   ============================================ */

.footer {
  background: var(--color-bg-secondary);
  padding: var(--spacing-2xl) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  text-align: center;
}

.footer-logo {
  font-family: var(--font-family-display);
  font-size: var(--font-size-xl);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-transform: uppercase;
  letter-spacing: 4px;
  margin-bottom: var(--spacing-lg);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
}

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

.footer-copyright {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 1200px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .work-card.large {
    grid-column: span 1;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-3xl: 2.5rem;
    --font-size-2xl: 1.75rem;
  }
  
  .hero-title {
    letter-spacing: 4px;
  }
  
  .section-title {
    letter-spacing: 3px;
  }
  
  .nav-links {
    gap: var(--spacing-md);
  }
  
  .works-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 250px;
  }
  
  .philosophy-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .nav {
    flex-direction: column;
    gap: var(--spacing-sm);
    height: auto;
    padding: var(--spacing-md) 0;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm) var(--spacing-md);
  }
  
  .hero {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
  }
}