/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #0a0a0a;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    color: #00d4ff;
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}

.brand-subtitle {
    color: #888;
    font-size: 0.8rem;
    font-weight: 300;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: #ccc;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #00d4ff;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #00d4ff, #0099cc);
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.user-menu {
    position: relative;
}

.user-name {
    color: #00d4ff;
    font-weight: 500;
    cursor: pointer;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 0.5rem 0;
    min-width: 150px;
    display: none;
    margin-top: 0.5rem;
    z-index: 1001;
}

.user-dropdown.show {
    display: block;
}

.user-dropdown a {
    display: block;
    color: #ccc;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.user-dropdown a:hover {
    background: rgba(0, 212, 255, 0.1);
    color: #00d4ff;
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #00d4ff;
    border: 1px solid #00d4ff;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* 主要内容 */
.main-content {
    margin-top: 80px;
}

/* 首页英雄区 */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -2;
}

.hero-bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(0, 153, 204, 0.1));
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #00d4ff, #ffffff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: #ccc;
    margin-bottom: 3rem;
    font-weight: 300;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-bottom: 4rem;
}

.hero-stats {
    display: flex;
    gap: 4rem;
    justify-content: center;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #00d4ff;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #888;
    font-size: 0.9rem;
}

/* 功能区 */
.features-section {
    padding: 6rem 0;
    background: linear-gradient(135deg, #0a0a0a, #1a1a1a);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

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

.feature-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.feature-card h3 {
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #ccc;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.feature-arrow {
    color: #00d4ff;
    font-size: 1.5rem;
    font-weight: bold;
    transition: transform 0.3s ease;
}

.feature-card:hover .feature-arrow {
    transform: translateX(5px);
}

/* 内容区域 */
.content-section {
    padding: 4rem 0;
    background: #0a0a0a;
    min-height: 80vh;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    color: white;
    font-size: 2rem;
    font-weight: 600;
}

/* 过滤器 */
.task-filters,
.product-filters,
.post-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    color: #888;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn:hover,
.filter-btn.active {
    background: rgba(0, 212, 255, 0.2);
    color: #00d4ff;
    border-color: #00d4ff;
}

/* 页面特定样式 */
.tasks-page, .experts-page, .products-page, .community-page, .profile-page {
    padding-top: 100px;
    min-height: 100vh;
    background: #0a0a0a;
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h1 {
    color: #00d4ff;
    font-size: 3rem;
    margin-bottom: 1rem;
}

.page-header .subtitle {
    color: #888;
    font-size: 1.2rem;
}

/* 网格布局 */
.task-grid,
.expert-grid,
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.post-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 卡片样式 */
.task-card,
.expert-card,
.product-card,
.post-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.task-card:hover,
.expert-card:hover,
.product-card:hover,
.post-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.1);
}

.card-title {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.card-description {
    color: #ccc;
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
}

/* 页面控制栏 */
.task-controls, .product-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.expert-controls {
    text-align: center;
    margin: 20px 0;
}

.task-filters, .product-filters, .expert-filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

/* 专家卡片样式 */
.expert-card .expert-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.expert-avatar, .author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.expert-avatar img, .author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder, .avatar-placeholder-small {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

.avatar-placeholder-small {
    width: 40px;
    height: 40px;
    font-size: 1rem;
}

.expert-info {
    flex: 1;
}

.expert-name {
    color: white;
    margin-bottom: 0.25rem;
}

.expert-rating, .rating-stars {
    color: #ffd700;
}

.expert-status {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.expert-status.online {
    background: rgba(0, 255, 0, 0.2);
    color: #00ff00;
}

.expert-status.offline {
    background: rgba(255, 255, 255, 0.1);
    color: #888;
}

.expert-bio {
    color: #ccc;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* 任务卡片样式 */
.task-header, .product-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.task-title, .product-title {
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    flex: 1;
}

.task-bounty, .product-price {
    color: #00d4ff;
    font-size: 1.1rem;
    font-weight: 600;
}

.task-description, .product-description {
    color: #ccc;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.task-meta, .product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
}

.task-status, .product-type {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
}

.task-status.active {
    background: rgba(0, 255, 0, 0.2);
    color: #00ff00;
}

.task-status.completed {
    background: rgba(0, 212, 255, 0.2);
    color: #00d4ff;
}

.task-date, .product-date {
    color: #888;
}

/* 社区页面样式 */
.community-content {
    max-width: 800px;
    margin: 0 auto;
}

.post-composer {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.post-composer h3 {
    color: white;
    margin-bottom: 1rem;
}

.post-composer textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    padding: 1rem;
    border-radius: 8px;
    resize: vertical;
    margin-bottom: 1rem;
}

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

.post-actions select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.posts-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.post-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    cursor: default;
}

.post-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.post-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-info h4 {
    color: white;
    margin-bottom: 0.25rem;
}

.post-type {
    font-size: 0.8rem;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
}

.post-type.professional {
    background: rgba(0, 212, 255, 0.2);
    color: #00d4ff;
}

.post-time {
    color: #888;
    font-size: 0.85rem;
}

.post-content p {
    color: #ccc;
    line-height: 1.6;
}

.post-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-text {
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.btn-text:hover {
    color: #00d4ff;
}

/* 个人中心样式 */
.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.profile-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 2rem;
}

.profile-card h2 {
    color: #00d4ff;
    margin-bottom: 1.5rem;
}

.profile-card.full-width {
    grid-column: 1 / -1;
}

.user-info .info-item {
    display: flex;
    margin-bottom: 1rem;
}

.user-info label {
    color: #888;
    min-width: 100px;
}

.user-info span {
    color: white;
}

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

.balance-display {
    margin: 2rem 0;
}

.balance-label {
    color: #888;
    margin-bottom: 0.5rem;
}

.balance-amount {
    font-size: 2.5rem;
    color: #00d4ff;
    font-weight: 700;
}

.currency-symbol {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

.wallet-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.transaction-list {
    max-height: 400px;
    overflow-y: auto;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.transaction-type {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    background: rgba(255, 255, 255, 0.1);
    margin-bottom: 0.5rem;
}

.transaction-description {
    color: #ccc;
    font-size: 0.9rem;
}

.transaction-amount {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.transaction-amount.positive {
    color: #00ff00;
}

.transaction-amount.negative {
    color: #ff4444;
}

.transaction-time {
    color: #888;
    font-size: 0.85rem;
}

/* 详情模态框样式 */
.task-detail-meta, .product-detail-meta {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.task-detail-section, .product-detail-section {
    margin-bottom: 2rem;
}

.task-detail-section h3, .product-detail-section h3 {
    color: #00d4ff;
    margin-bottom: 1rem;
}

.task-detail-info, .product-detail-info {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.task-detail-info p, .product-detail-info p {
    margin-bottom: 0.5rem;
    color: #ccc;
}

.expert-detail-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.expert-avatar-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
}

.avatar-placeholder-large {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #00d4ff, #0099cc);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    font-weight: bold;
}

.expert-detail-info h2 {
    color: white;
    margin-bottom: 0.5rem;
}

.expert-detail-section {
    margin-bottom: 2rem;
}

.expert-detail-section h3 {
    color: #00d4ff;
    margin-bottom: 1rem;
}

.expert-detail-actions {
    margin-top: 2rem;
}

/* 空状态和错误状态 */
.empty-state, .error-state {
    text-align: center;
    padding: 3rem;
    color: #888;
}

.error-state {
    color: #ff4444;
}

/* 加载状态 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 3rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: #00d4ff;
    animation: spin 1s ease-in-out infinite;
}

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

/* Toast 消息提示 */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: rgba(255, 255, 255, 0.95);
    color: #333;
    padding: 1rem 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 2000;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast.success {
    background: rgba(0, 255, 0, 0.9);
    color: white;
}

.toast.error {
    background: rgba(255, 68, 68, 0.9);
    color: white;
}

.toast.info {
    background: rgba(0, 212, 255, 0.9);
    color: white;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: #888;
}

.card-price {
    color: #00d4ff;
    font-weight: 600;
    font-size: 1.1rem;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    background: rgba(20, 20, 20, 0.95);
    margin: 5% auto;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    width: 90%;
    max-width: 600px;
    position: relative;
    backdrop-filter: blur(20px);
}

.close {
    color: #888;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: #00d4ff;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    color: white;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #00d4ff;
    box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.2);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .task-grid,
    .expert-grid,
    .product-grid {
        grid-template-columns: 1fr;
    }
}

/* 加载动画 */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(0, 212, 255, 0.3);
    border-top: 3px solid #00d4ff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: #888;
}

.empty-state h3 {
    color: #ccc;
    margin-bottom: 1rem;
}

/* 成功/错误消息 */
.message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.message.success {
    background: rgba(0, 255, 0, 0.1);
    border: 1px solid rgba(0, 255, 0, 0.3);
    color: #00ff00;
}

.message.error {
    background: rgba(255, 0, 0, 0.1);
    border: 1px solid rgba(255, 0, 0, 0.3);
    color: #ff6b6b;
}