/* ================================
   自媒体AI工具箱 - 移动端优先样式
   ================================ */

/* CSS变量定义 */
:root {
    --primary-color: #1a1a1a;
    --primary-light: #333333;
    --secondary-color: #666666;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f0f2f5;
    --border-color: rgba(0, 0, 0, 0.06);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --tab-bar-height: 64px;
    --header-height: 56px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

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

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ================================
   主内容区域
   ================================ */
.main-content {
    padding-bottom: calc(var(--tab-bar-height) + 20px);
    min-height: 100vh;
}

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

/* ================================
   顶部导航
   ================================ */
.app-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    padding: var(--spacing-sm) 0;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--header-height);
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.brand-icon {
    width: 28px;
    height: 28px;
    filter: invert(0);
}

.brand-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.header-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-tertiary);
    transition: var(--transition-fast);
}

.btn-icon:active {
    transform: scale(0.95);
    background: var(--border-color);
}

.btn-icon img {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

/* ================================
   公告区域
   ================================ */
.notice-section {
    padding: var(--spacing-md) 0;
}

.notice-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #fefefe 0%, #f8f9fa 100%);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.notice-card:active {
    transform: scale(0.98);
}

.notice-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-color);
    border-radius: var(--radius-md);
}

.notice-icon img {
    width: 20px;
    height: 20px;
    filter: invert(1);
}

.notice-content {
    flex: 1;
    min-width: 0;
}

.notice-tag {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 2px;
}

.notice-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
}

.notice-arrow img {
    width: 20px;
    height: 20px;
    opacity: 0.4;
}

/* ================================
   功能展示区域
   ================================ */
.features-section {
    padding: var(--spacing-lg) 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.section-link {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.features-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* 分类选择区域 */
.categories-section {
    padding: var(--spacing-md) 0;
    background: var(--bg-primary);
}

.categories-scroll {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.categories-scroll::-webkit-scrollbar {
    display: none;
}

.category-item {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: var(--transition-fast);
    cursor: pointer;
    border: 2px solid transparent;
}

.category-item:hover {
    background: var(--border-color);
}

.category-item:active {
    transform: scale(0.95);
}

.category-item.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.feature-count {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: normal;
}

/* 功能卡片 */
.feature-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-2px);
}

.feature-card:active {
    transform: scale(0.98);
}

.feature-icon-wrapper {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a1a 0%, #333333 100%);
    border-radius: var(--radius-md);
}

.feature-icon-wrapper.icon-purple {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.feature-icon-wrapper.icon-green {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.feature-icon-wrapper.icon-orange {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.feature-icon-wrapper.icon-pink {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.feature-icon-wrapper.icon-cyan {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.feature-icon {
    width: 24px;
    height: 24px;
    filter: invert(1);
}

.feature-info {
    flex: 1;
    min-width: 0;
}

.feature-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.feature-desc {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.feature-arrow img {
    width: 18px;
    height: 18px;
    opacity: 0.3;
}

/* 分页控件 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-lg) 0;
}

.pagination button {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

.pagination button:hover:not(:disabled) {
    background: var(--bg-tertiary);
}

.pagination button:active:not(:disabled) {
    transform: scale(0.95);
}

.pagination button.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination button.prev-next {
    padding: var(--spacing-xs) var(--spacing-sm);
}

.pagination button.prev-next img {
    width: 16px;
    height: 16px;
    opacity: 0.6;
}

.pagination button.active img {
    opacity: 1;
    filter: invert(1);
}

/* ================================
   快捷入口
   ================================ */
.quick-section {
    padding: var(--spacing-md) 0 var(--spacing-xl);
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.quick-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-xs);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
}

.quick-item:active {
    transform: scale(0.95);
}

.quick-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 50%;
}

.quick-icon img {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

.quick-item span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* 加载状态 */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl) 0;
}

.loading-spinner::after {
    content: '';
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* 空状态 */
.empty-state {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-muted);
}

.empty-state img {
    width: 64px;
    height: 64px;
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

.empty-state p {
    font-size: 0.875rem;
    margin: 0;
}

/* ================================
   底部TabBar
   ================================ */
.tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: var(--tab-bar-height);
    background: var(--bg-primary);
    padding-bottom: env(safe-area-inset-bottom);
}

.tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: var(--spacing-xs) 0;
    gap: 4px;
    transition: var(--transition-fast);
}

.tab-icon {
    width: 24px;
    height: 24px;
    opacity: 0.5;
    transition: var(--transition-fast);
}

.tab-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.tab-item.active .tab-icon {
    opacity: 1;
}

.tab-item.active .tab-label {
    color: var(--text-primary);
    font-weight: 500;
}

/* ================================
   个人中心页面
   ================================ */
.profile-header {
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--bg-primary);
    text-align: center;
}

.avatar-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.avatar-wrapper img {
    width: 40px;
    height: 40px;
    filter: invert(1);
}

.user-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.user-id {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* 会员状态卡片 */
.vip-card {
    margin: var(--spacing-md);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #1a1a1a 0%, #333333 100%);
    border-radius: var(--radius-xl);
    color: #fff;
}

.vip-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.vip-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.vip-title img {
    width: 24px;
    height: 24px;
    filter: invert(1) sepia(1) saturate(5) hue-rotate(15deg);
}

.vip-title span {
    font-size: 1rem;
    font-weight: 500;
}

.vip-badge {
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 0.75rem;
}

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

.vip-expire {
    font-size: 0.875rem;
    opacity: 0.8;
}

.vip-btn {
    padding: 8px 20px;
    background: #fff;
    color: var(--primary-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

/* 菜单列表 */
.menu-section {
    padding: var(--spacing-md);
}

.menu-group {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    transition: var(--transition-fast);
}

.menu-item:active {
    background: var(--bg-tertiary);
}

.menu-item:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.menu-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.menu-icon img {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

.menu-info {
    flex: 1;
}

.menu-title {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.menu-desc {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.menu-arrow img {
    width: 18px;
    height: 18px;
    opacity: 0.3;
}

/* ================================
   兑换卡密模态框
   ================================ */
.redeem-modal {
    padding: var(--spacing-lg);
}

.redeem-input {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    transition: var(--transition-fast);
}

.redeem-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-primary {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--primary-color);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.btn-primary:active {
    transform: scale(0.98);
    opacity: 0.9;
}

/* ================================
   其他页面
   ================================ */
.other-page-header {
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--bg-primary);
}

.other-page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

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

.category-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    padding-left: 4px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-2px);
}

.category-card:active {
    transform: scale(0.98);
}

.category-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.category-icon img {
    width: 24px;
    height: 24px;
    opacity: 0.7;
}

.category-name {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* 海报区域 */
.poster-section {
    padding: 5px 0;
}

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

.poster-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.poster-image:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ================================
   通用组件
   ================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-md);
    text-align: center;
}

.empty-icon {
    width: 80px;
    height: 80px;
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

.empty-text {
    font-size: 0.9375rem;
    color: var(--text-muted);
}

/* 加载动画 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ================================
   响应式适配
   ================================ */
@media (min-width: 768px) {
    .container {
        max-width: 480px;
        margin: 0 auto;
    }
    
    .features-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 安全区域适配 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .main-content {
        padding-bottom: calc(var(--tab-bar-height) + env(safe-area-inset-bottom) + 20px);
    }
    
    .tab-bar {
        height: calc(var(--tab-bar-height) + env(safe-area-inset-bottom));
    }
}