/* ============================================
   现代风格设计系统 - Modern Design System
   特点：玻璃拟态、流畅动画、响应式设计
   ============================================ */

/* CSS变量 - 设计令牌 */
:root {
    /* 主色调 - 蓝色系 */
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #06b6d4;
    --accent: #10b981;
    
    /* 背景色 - 浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.9);
    --bg-glass: rgba(255, 255, 255, 0.7);
    
    /* 文字色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* 边框和阴影 */
    --border-color: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* 动态背景 - 浅色主题 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

/* ============================================
   导航栏样式
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-md) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

/* 搜索框 */
.search-container {
    display: flex;
    align-items: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    width: 100%;
    max-width: 450px;
    transition: all var(--transition-normal);
}

.search-container:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.search-input {
    flex: 1;
    border: none;
    padding: 14px 20px;
    font-size: 15px;
    outline: none;
    background: transparent;
    color: var(--text-primary);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    background: transparent;
    border: none;
    padding: 14px 18px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    transition: all var(--transition-fast);
}

.search-btn:hover {
    color: var(--primary-light);
    transform: scale(1.1);
}

/* 用户信息区域 */
.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.points-badge {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    padding: 8px 16px;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: 14px;
    box-shadow: var(--shadow-md);
}

/* ============================================
   按钮样式 - 统一设计系统
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    color: #0369a1;
    border: 1px solid #0ea5e9;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #bae6fd, #7dd3fc);
    border-color: #0284c7;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.4);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}
.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
}

/* 认证按钮区域 */
.auth-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

.auth-buttons .btn,
.auth-buttons #login-btn,
.auth-buttons #register-btn {
    margin: 0;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

.btn-full {
    width: 100%;
}

.btn-small {
    padding: 8px 16px;
    font-size: 13px;
}

/* 导航按钮 - 统一风格 */
.nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.nav-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* 搜索按钮 - 统一风格 */
.search-btn {
    background: transparent;
    border: none;
    padding: 14px 18px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover {
    color: var(--primary-light);
    transform: scale(1.1);
}

/* ============================================
   主要内容区域
   ============================================ */
.main-content {
    margin-top: 80px;
    padding: var(--space-xl);
    min-height: calc(100vh - 80px);
}

/* 分类导航 */
.category-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding: var(--space-md);
    background: var(--bg-glass);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.nav-left {
    display: flex;
    gap: var(--space-sm);
}

.nav-right {
    display: flex;
    gap: var(--space-sm);
}

.quick-actions {
    display: flex;
    gap: var(--space-sm);
}

/* ============================================
   模型卡片网格
   ============================================ */
.models-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
    padding: var(--space-md) 0;
}

.model-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
}

.model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(6, 182, 212, 0.1));
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.model-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

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

.model-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.model-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

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

.model-info h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

/* 模型标签 */
.model-tags {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.model-tag {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 600;
    border: 1px solid;
    background-color: transparent;
}

.model-tag.hot {
    color: #ff4757;
    border-color: #ff4757;
    background-color: rgba(255, 71, 87, 0.1);
}

.model-tag.new {
    color: #2ed573;
    border-color: #2ed573;
    background-color: rgba(46, 213, 115, 0.1);
}

.category-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.points-cost {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 16px;
    font-weight: 700;
    color: var(--secondary);
}

.points-icon {
    font-size: 18px;
}

/* 模型价格行 - 等距离布局 */
.model-price-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.model-points {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.model-sales {
    font-size: 13px;
    color: var(--text-muted);
}

.model-favorite {
    font-size: 13px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.model-favorite:hover {
    color: #ff4757;
}

/* ============================================
   弹窗样式
   ============================================ */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    padding: var(--space-xl);
    animation: fadeIn 0.3s ease;
    overflow-y: auto;
}

.modal.show {
    display: block;
}

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

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    max-width: 900px;
    width: 100%;
    position: relative;
    animation: slideUp 0.4s ease;
    box-shadow: var(--shadow-lg);
    margin: auto;
}

.modal-content.large {
    max-width: 1200px;
}

.modal-content.small {
    max-width: 450px;
}

.modal-content.medium {
    max-width: 500px;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all var(--transition-fast);
    z-index: 10;
}

.close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    padding: var(--space-xl);
}

.modal-body .model-image {
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.modal-body .model-image img,
#modal-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.modal-body .model-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-body h2 {
    font-size: 28px;
    margin-bottom: var(--space-md);
}

.modal-body .category {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: var(--space-md);
}

.modal-body .points-cost {
    font-size: 24px;
    margin-bottom: var(--space-lg);
}

.modal-body .description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

/* ============================================
   表单样式
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 15px;
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 18px center;
    padding-right: 45px;
}

/* ============================================
   加载和空状态
   ============================================ */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    color: var(--text-secondary);
    font-size: 16px;
    grid-column: 1 / -1;
}

.loading::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin-left: var(--space-md);
    animation: spin 1s linear infinite;
}

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

.empty-state {
    text-align: center;
    padding: var(--space-xl);
    color: var(--text-muted);
    grid-column: 1 / -1;
}

/* ============================================
   消息提示
   ============================================ */
.message {
    position: fixed;
    top: 100px;
    right: var(--space-xl);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    font-weight: 500;
    z-index: 3000;
    transform: translateX(400px);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.message.show {
    transform: translateX(0);
}

.message.success {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
}

.message.error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.message.info {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .header {
        padding: var(--space-md);
    }
    
    .category-nav {
        flex-direction: row !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        gap: 6px !important;
        padding: 6px 10px !important;
        margin-top: 4px !important;
        margin-bottom: 6px !important;
        border-radius: 10px !important;
        -webkit-overflow-scrolling: touch;
    }
    
    .category-nav::-webkit-scrollbar {
        display: none;
    }
    
    .nav-left {
        display: flex !important;
        flex-wrap: nowrap !important;
        gap: 8px !important;
        width: auto !important;
    }
    
    .nav-right {
        display: none !important;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
        padding: 12px;
        gap: 16px;
    }
    
    .modal-body .model-image {
        aspect-ratio: 1 / 1;
        height: auto;
        border-radius: 12px;
    }

    .modal-body .model-image img,
    #modal-image {
        aspect-ratio: 1 / 1;
        object-fit: contain;
    }

    .modal-body .model-info {
        gap: 8px;
    }

    .modal-body h2 {
        font-size: 18px;
    }

    .modal-body .category {
        font-size: 12px;
        padding: 4px 12px;
    }

    .modal-body .points-cost {
        font-size: 18px;
        margin: 12px 0;
    }

    .modal-body .description {
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 16px;
    }
}

@media (max-width: 768px) {
    .header {
        height: auto !important;
        min-height: 50px !important;
        padding: 8px 10px !important;
        gap: 8px !important;
    }

    .header-center {
        flex: 1 1 auto !important;
        min-width: 0 !important;
        padding: 0 6px !important;
    }

    .search-container {
        width: 100% !important;
    }

    .search-input {
        padding: 6px 10px !important;
        font-size: 12px !important;
    }

    .auth-buttons {
        gap: 4px !important;
    }

    .auth-buttons .btn,
    .auth-buttons #login-btn,
    .auth-buttons #register-btn {
        padding: 6px 10px !important;
        font-size: 11px !important;
        min-height: 32px !important;
        margin: 0 !important;
    }

    .models-grid {
        grid-template-columns: 1fr !important;
        gap: 10px !important;
    }

    .quick-actions {
        display: none !important;
    }

    .logo span {
        display: none !important;
    }

    /* 移动端模态框优化 */
    .modal-content {
        margin: 8px auto !important;
        border-radius: 16px !important;
    }

    .modal-header {
        position: sticky !important;
        top: 0 !important;
        padding: 12px 16px !important;
        border-radius: 16px 16px 0 0 !important;
        z-index: 1000 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        background: #ffffff !important;
        border-bottom: 1px solid #e2e8f0 !important;
    }

    .modal-header-title {
        font-size: 16px !important;
        font-weight: 600 !important;
        color: #1e293b !important;
    }

    .close {
        position: static !important;
        width: 32px !important;
        height: 32px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .modal-body {
        padding: 12px !important;
    }

    .modal-body .model-image {
        aspect-ratio: 1 / 1;
        height: auto !important;
    }

    .modal-body .model-image img,
    #modal-image {
        aspect-ratio: 1 / 1;
        object-fit: contain !important;
    }

    .model-preview-container {
        aspect-ratio: 1 / 1;
        height: auto !important;
    }

    .modal-body .model-info h2 {
        font-size: 16px !important;
    }

    .modal-body .model-info .points-cost {
        font-size: 16px !important;
    }

    .modal-body .model-info .description {
        font-size: 13px !important;
    }

    .modal-actions .btn {
        padding: 12px !important;
        font-size: 14px !important;
    }

    .bottom-nav {
        display: flex !important;
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        background: #fff !important;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1) !important;
        z-index: 1000 !important;
        padding: 6px 0 !important;
        padding-bottom: calc(env(safe-area-inset-bottom, 6px) + 6px) !important;
        justify-content: space-around !important;
    }

    .bottom-nav-item {
        flex: 1 !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
        text-decoration: none;
        color: #999 !important;
        font-size: 10px !important;
        gap: 3px !important;
        transition: all 0.3s;
        padding: 4px !important;
        min-height: 50px;
    }

    .bottom-nav-item i {
        font-size: 22px !important;
    }

    .bottom-nav-item span {
        font-size: 10px !important;
    }

    .bottom-nav-item.active {
        color: #667eea !important;
    }

    .bottom-nav-item.active i {
        transform: scale(1.1);
    }

    .mobile-only {
        display: flex !important;
    }

    .main-content {
        padding-bottom: 70px !important;
        padding-top: 50px !important;
    }

    .model-card {
        min-height: auto !important;
        border-radius: 12px !important;
        overflow: hidden;
    }

    .model-image {
        height: 200px !important;
    }

    .model-info {
        padding: 8px !important;
    }

    .model-name {
        font-size: 12px !important;
        font-weight: 600 !important;
    }

    .model-points {
        font-size: 12px !important;
        font-weight: 600 !important;
        color: var(--text-secondary) !important;
    }

    .model-sales {
        font-size: 11px !important;
        color: var(--text-muted) !important;
    }

    .model-favorite {
        font-size: 11px !important;
        color: var(--text-muted) !important;
    }

    .model-tag {
        font-size: 10px !important;
        padding: 2px 6px !important;
        border-radius: 10px !important;
    }
}

/* ============================================
   滚动条美化
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}