/* ============================================
   index.css - 首页专属样式
   ============================================ */

/* Hero 装饰 */
.hero-decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}

.blob-1 {
  width: 500px;
  height: 500px;
  background: rgba(124, 58, 237, 0.2);
  top: -100px;
  right: 5%;
  animation: float 8s ease-in-out infinite;
}

.blob-2 {
  width: 300px;
  height: 300px;
  background: rgba(245, 158, 11, 0.2);
  bottom: 10%;
  right: 15%;
  animation: float 10s ease-in-out infinite reverse;
}

.blob-3 {
  width: 200px;
  height: 200px;
  background: rgba(37, 99, 235, 0.2);
  top: 30%;
  left: 60%;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-20px) rotate(5deg); }
  66% { transform: translateY(10px) rotate(-3deg); }
}

.stat-unit {
  font-size: 0.5em;
  margin-left: 2px;
}

/* 核心功能卡片 */
.features-section {
  background: var(--color-white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

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

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

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  background: var(--color-white);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
  margin-bottom: var(--space-lg);
}

.feature-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-md);
}

.feature-tags li {
  font-size: var(--font-size-xs);
  padding: 3px 8px;
  background: rgba(124, 58, 237, 0.06);
  color: var(--color-primary);
  border-radius: var(--radius-full);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

.feature-link:hover {
  gap: 10px;
}

/* 热门素材 */
.hot-resources {
  background: var(--color-bg);
}

.resource-tabs {
  margin-bottom: var(--space-xl);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-md);
}

.resource-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

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

.resource-thumb {
  position: relative;
  height: 150px;
  overflow: hidden;
}

.thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: rgba(255,255,255,0.8);
}

.resource-thumb .tag {
  position: absolute;
  top: 10px;
  left: 10px;
}

.resource-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.resource-card:hover .resource-overlay {
  opacity: 1;
}

.audio-thumb .resource-overlay {
  display: none;
}

.resource-info {
  padding: var(--space-md);
}

.resource-info h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.resource-stat {
  font-size: var(--font-size-xs);
  color: var(--color-text-lighter);
}

/* 文字卡片 */
.text-card .text-content {
  padding: var(--space-lg);
}

.text-type {
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.text-content p {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.text-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-text-lighter);
}

/* AI工具体验 */
.ai-tool-section {
  background: var(--color-white);
}

.ai-tool-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-3xl);
  align-items: center;
}

.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(245, 158, 11, 0.1);
  color: var(--color-warning);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.ai-tool-info h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.ai-tool-info p {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.ai-features {
  margin-bottom: var(--space-xl);
}

.ai-feature {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.ai-feature i {
  color: var(--color-success);
  font-size: 16px;
}

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

.ai-free-tag {
  font-size: var(--font-size-sm);
  color: var(--color-success);
  font-weight: 500;
}

/* AI预览卡片 */
.ai-preview-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.ai-preview-header {
  background: #1E1B4B;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.preview-dots {
  display: flex;
  gap: 6px;
}

.preview-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
}

.preview-dots span:nth-child(1) { background: #FF5F57; }
.preview-dots span:nth-child(2) { background: #FFBD2E; }
.preview-dots span:nth-child(3) { background: #28CA41; }

.preview-title {
  color: rgba(255,255,255,0.8);
  font-size: var(--font-size-sm);
}

.ai-preview-body {
  padding: var(--space-xl);
}

.ai-input-area {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.ai-input-area textarea {
  width: 100%;
  min-height: 120px;
  padding: var(--space-md);
  border: none;
  resize: none;
  font-size: var(--font-size-sm);
  color: var(--color-text);
}

.ai-input-area textarea:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--color-primary-light);
}

.ai-upload {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-bg);
  border-top: 1px dashed var(--color-border);
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ai-upload:hover {
  color: var(--color-primary);
  background: rgba(124, 58, 237, 0.05);
}

.ai-settings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

/* 创作者入驻 */
.creator-section {
  background: linear-gradient(135deg, #EDE9FE 0%, #DBEAFE 100%);
}

.creator-showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.creator-rank {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
}

.creator-rank h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.rank-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.rank-item:hover {
  background: var(--color-bg);
}

.rank-item.top-1 {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.1), rgba(255, 165, 0, 0.1));
}

.rank-num {
  font-size: var(--font-size-xl);
  width: 32px;
  text-align: center;
}

.rank-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
}

.rank-info {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.rank-name {
  font-weight: 600;
  color: var(--color-dark);
  font-size: var(--font-size-sm);
}

.rank-earnings {
  font-size: var(--font-size-xs);
  color: var(--color-danger);
  font-weight: 600;
}

.creator-policy {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
}

.creator-policy h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.policy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.policy-item {
  padding: var(--space-md);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.policy-item:hover {
  background: rgba(124, 58, 237, 0.05);
}

.policy-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #EDE9FE, #DBEAFE);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.policy-item h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.policy-item p {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 创作课堂预览 */
.classroom-preview {
  background: var(--color-bg);
}

.course-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

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

.course-thumb {
  position: relative;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: rgba(255,255,255,0.9);
  cursor: pointer;
}

.course-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.2);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.course-card:hover .course-thumb::after {
  opacity: 1;
}

.course-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.7);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
}

.course-info {
  padding: var(--space-lg);
}

.course-info h4 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-dark);
  margin: var(--space-sm) 0;
}

.course-info p {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.course-meta {
  display: flex;
  gap: var(--space-lg);
  font-size: var(--font-size-xs);
  color: var(--color-text-lighter);
}

/* 会员权益 */
.membership-section {
  background: var(--color-white);
}

.membership-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.membership-card {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  border: 2px solid transparent;
  transition: all var(--transition-normal);
  position: relative;
}

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

.membership-card.popular {
  background: linear-gradient(135deg, #1E1B4B, #312E81);
  color: white;
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.membership-card.popular:hover {
  transform: scale(1.05) translateY(-4px);
}

.popular-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: white;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
}

.membership-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.membership-header h3 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: 4px;
}

.membership-header p {
  font-size: var(--font-size-sm);
  opacity: 0.7;
}

.membership-price {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.membership-price .price {
  font-size: 48px;
  font-weight: 800;
}

.membership-card:not(.popular) .price {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.membership-price .period {
  font-size: var(--font-size-base);
  opacity: 0.6;
}

.membership-features {
  margin-bottom: var(--space-xl);
}

.membership-features .feature {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: var(--font-size-sm);
}

.membership-features .feature.on {
  color: inherit;
}

.membership-features .feature.on i {
  color: var(--color-success);
}

.membership-card.popular .membership-features .feature.on i {
  color: #4ADE80;
}

.membership-features .feature.off {
  color: var(--color-text-lighter);
  opacity: 0.5;
}

.membership-features .feature.off i {
  color: var(--color-text-lighter);
}

.membership-card .btn {
  margin-top: auto;
}

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

.membership-card.popular .btn-primary:hover {
  background: var(--color-bg);
}

.membership-note {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-lighter);
  margin-top: var(--space-xl);
}

/* 合作伙伴 */
.partners-section {
  background: var(--color-bg);
  padding: var(--space-2xl) 0;
}

.partners-title {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-lighter);
  margin-bottom: var(--space-xl);
  font-weight: 500;
  letter-spacing: 2px;
}

.partners-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2xl);
}

.partner-logo {
  padding: var(--space-md) var(--space-xl);
  background: var(--color-white);
  border-radius: var(--radius-md);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-light);
  opacity: 0.6;
  transition: all var(--transition-fast);
  cursor: default;
}

.partner-logo:hover {
  opacity: 1;
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

/* 响应式 */
@media (max-width: 1200px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .resources-grid { grid-template-columns: repeat(4, 1fr); }
  .ai-tool-wrapper { grid-template-columns: 1fr; gap: var(--space-xl); }
  .ai-tool-preview { order: -1; }
}

@media (max-width: 1024px) {
  .creator-showcase { grid-template-columns: 1fr; }
  .membership-cards { grid-template-columns: 1fr; max-width: 400px; }
  .membership-card.popular { transform: none; }
  .membership-card.popular:hover { transform: translateY(-4px); }
}

@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; }
  .resources-grid { grid-template-columns: repeat(3, 1fr); }
  .policy-grid { grid-template-columns: 1fr; }
  .partners-grid { gap: var(--space-lg); }
  .partner-logo { padding: var(--space-sm) var(--space-lg); font-size: var(--font-size-base); }
  .ai-settings { grid-template-columns: 1fr; }
}

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