/* ==================== 全局样式 ==================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* 颜色变量 */
  --color-primary: #ff006e;
  --color-secondary: #00d9ff;
  --color-success: #00ff88;
  --color-warning: #ffff00;
  --color-danger: #ff3333;
  
  /* 背景色 */
  --bg-base: #0f0f0f;
  --bg-card: #1a1a1a;
  --bg-hover: #252525;
  --bg-glass: rgba(255, 255, 255, 0.05);
  
  /* 边框色 */
  --border-color: #333333;
  --border-light: #444444;
  
  /* 文字色 */
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --text-tertiary: #707070;
  
  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ==================== 背景效果 ==================== */

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(
    ellipse at 20% 50%,
    rgba(255, 0, 110, 0.08) 0%,
    transparent 50%
  ),
  radial-gradient(
    ellipse at 80% 80%,
    rgba(0, 217, 255, 0.08) 0%,
    transparent 50%
  );
  pointer-events: none;
  z-index: -1;
}

/* ==================== 排版 ==================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.5px;
}

h1 {
  font-size: 2.5rem;
  line-height: 1.2;
}

h2 {
  font-size: 2rem;
  line-height: 1.3;
}

h3 {
  font-size: 1.5rem;
  line-height: 1.4;
}

h4 {
  font-size: 1.25rem;
  line-height: 1.4;
}

h5 {
  font-size: 1.125rem;
  line-height: 1.5;
}

h6 {
  font-size: 1rem;
  line-height: 1.5;
}

p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

small {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ==================== 链接 ==================== */

a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* ==================== 按钮 ==================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #ff1493);
  color: white;
  box-shadow: 0 0 20px rgba(255, 0, 110, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(255, 0, 110, 0.5);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--color-secondary);
  border: 1px solid var(--color-secondary);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-ghost:hover {
  background: var(--bg-glass);
  border-color: var(--color-secondary);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

/* ==================== 卡片 ==================== */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(255, 0, 110, 0.1) 0%,
    transparent 50%,
    rgba(0, 217, 255, 0.1) 100%
  );
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.card:hover {
  border-color: var(--border-light);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.card-body {
  position: relative;
  z-index: 1;
}

.card-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==================== 输入框 ==================== */

input,
textarea,
select {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-family: inherit;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 15px rgba(0, 217, 255, 0.2);
}

input::placeholder {
  color: var(--text-tertiary);
}

/* ==================== 标签 ==================== */

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-primary {
  background: rgba(255, 0, 110, 0.2);
  color: var(--color-primary);
}

.badge-success {
  background: rgba(0, 255, 136, 0.2);
  color: var(--color-success);
}

.badge-warning {
  background: rgba(255, 255, 0, 0.2);
  color: var(--color-warning);
}

.badge-danger {
  background: rgba(255, 51, 51, 0.2);
  color: var(--color-danger);
}

.badge-secondary {
  background: rgba(0, 217, 255, 0.2);
  color: var(--color-secondary);
}

/* ==================== 网格布局 ==================== */

.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

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

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .grid-cols-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-cols-4,
  .grid-cols-3,
  .grid-cols-2 {
    grid-template-columns: 1fr;
  }
}

/* ==================== 容器 ==================== */

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-gutter);
}

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

.section-header {
  margin-bottom: var(--spacing-lg);
}

/* ==================== 实用类 ==================== */

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

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

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

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

.mt-sm {
  margin-top: var(--spacing-sm);
}

.mt-md {
  margin-top: var(--spacing-md);
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

.mb-md {
  margin-bottom: var(--spacing-md);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.p-sm {
  padding: var(--spacing-sm);
}

.p-md {
  padding: var(--spacing-md);
}

.p-lg {
  padding: var(--spacing-lg);
}

.rounded-sm {
  border-radius: var(--radius-sm);
}

.rounded-md {
  border-radius: var(--radius-md);
}

.rounded-lg {
  border-radius: var(--radius-lg);
}

.rounded-xl {
  border-radius: var(--radius-xl);
}

.opacity-50 {
  opacity: 0.5;
}

.opacity-75 {
  opacity: 0.75;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* ==================== 渐变 ==================== */

.gradient-primary {
  background: linear-gradient(135deg, var(--color-primary), #ff1493);
}

.gradient-secondary {
  background: linear-gradient(135deg, var(--color-secondary), #00ffff);
}

.gradient-success {
  background: linear-gradient(135deg, var(--color-success), #00ff88);
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==================== 动画 ==================== */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(255, 0, 110, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(255, 0, 110, 0.6);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.5s ease-out;
}

.animate-slideInUp {
  animation: slideInUp 0.5s ease-out;
}

.animate-slideInDown {
  animation: slideInDown 0.5s ease-out;
}

.animate-slideInLeft {
  animation: slideInLeft 0.5s ease-out;
}

.animate-slideInRight {
  animation: slideInRight 0.5s ease-out;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

.animate-glow {
  animation: glow 2s ease-in-out infinite;
}

/* ==================== 响应式 ==================== */

@media (max-width: 1024px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: 1.5rem;
  }
  
  h2 {
    font-size: 1.25rem;
  }
  
  h3 {
    font-size: 1.125rem;
  }
  
  .card {
    padding: var(--spacing-md);
  }
  
  .section {
    padding: var(--spacing-lg) 0;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* ==================== 滚动条 ==================== */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-light);
}