/**
 * Apple Glass Liquid Theme - 苹果玻璃液态风格
 * 统一应用于所有页面
 */

:root {
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-bg-light: rgba(255, 255, 255, 0.5);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-blur: 20px;
    
    --primary: #007AFF;
    --primary-light: #5AC8FA;
    --primary-dark: #0051D5;
    --secondary: #5856D6;
    --success: #34C759;
    --warning: #FF9500;
    --danger: #FF3B30;
    
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #AEAEB2;
    
    --bg-gradient: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 50%, #90CAF9 100%);
    --card-gradient: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-gradient);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color 0.2s; }
a:hover { color: var(--primary); }

/* 玻璃卡片 */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 80px);
    max-width: 1400px;
    height: 64px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.9);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 18px;
    color: var(--primary-dark);
}

.nav-logo img { height: 36px; }

.nav-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.4);
}

.nav-menu {
    display: flex;
    gap: 8px;
    list-style: none;
}

.nav-menu a {
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    color: #475569;
    border-radius: 12px;
    transition: all 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    background: rgba(59, 130, 246, 0.1);
    color: #2563eb;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.9);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}

.btn-outline:hover {
    background: rgba(0, 122, 255, 0.1);
}

.btn-text {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 12px;
}

.btn-text:hover {
    color: var(--primary);
}

.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

/* 表单 */
.form-group { margin-bottom: 16px; }

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    color: var(--text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
    background: #fff;
}

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

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

select.form-input {
    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='%2386868B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* 卡片 */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-body { padding: 20px; }
.card-footer { padding: 16px 20px; border-top: 1px solid rgba(0, 0, 0, 0.05); }

/* 提示框 */
.alert {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.alert-success {
    background: rgba(52, 199, 89, 0.12);
    color: #1B7F37;
    border: 1px solid rgba(52, 199, 89, 0.2);
}

.alert-error {
    background: rgba(255, 59, 48, 0.12);
    color: #C41E3A;
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.alert-warning {
    background: rgba(255, 149, 0, 0.12);
    color: #B25000;
    border: 1px solid rgba(255, 149, 0, 0.2);
}

.alert-info {
    background: rgba(0, 122, 255, 0.12);
    color: #0051D5;
    border: 1px solid rgba(0, 122, 255, 0.2);
}

/* 表格 */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-md);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 16px;
    text-align: left;
    font-size: 14px;
}

th {
    background: rgba(0, 0, 0, 0.02);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td { border-top: 1px solid rgba(0, 0, 0, 0.05); }

tr:hover td { background: rgba(0, 122, 255, 0.03); }

/* 标签 */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
}

.badge-primary { background: rgba(0, 122, 255, 0.12); color: var(--primary); }
.badge-success { background: rgba(52, 199, 89, 0.12); color: var(--success); }
.badge-warning { background: rgba(255, 149, 0, 0.12); color: var(--warning); }
.badge-danger { background: rgba(255, 59, 48, 0.12); color: var(--danger); }
.badge-secondary { background: rgba(0, 0, 0, 0.06); color: var(--text-secondary); }

/* 分页 */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 24px;
}

.pagination a,
.pagination span {
    padding: 8px 14px;
    font-size: 14px;
    border-radius: var(--radius-sm);
    background: var(--glass-bg-light);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    transition: all 0.2s;
}

.pagination a:hover { background: #fff; color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 页脚 */
.footer {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    padding: 40px 24px 24px;
    margin-top: 60px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
}

.footer h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer p,
.footer a {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.footer-bottom {
    max-width: 1200px;
    margin: 32px auto 0;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    text-align: center;
    font-size: 13px;
    color: var(--text-tertiary);
}

/* 响应式 */
@media (max-width: 768px) {
    .navbar {
        width: calc(100% - 40px);
        padding: 0 20px;
        height: 56px;
    }
    
    .nav-menu { display: none; }
    
    .nav-logo .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}


/* ========== 后台管理专用样式 ========== */

/* 侧边栏 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 240px;
    height: 100vh;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-right: 1px solid var(--glass-border);
    z-index: 100;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 16px;
    color: var(--text-primary);
}

.sidebar-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }
.sidebar-nav ul { list-style: none; }

.nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    margin-bottom: 4px;
}

.nav-item a:hover {
    background: rgba(0, 122, 255, 0.08);
    color: var(--primary);
}

.nav-item a.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.nav-item a i { width: 20px; text-align: center; }

/* 主内容区 */
.main-content {
    margin-left: 240px;
    min-height: 100vh;
    padding: 24px;
}

.top-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-left h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px 6px 6px;
    background: var(--glass-bg-light);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-icon.blue { background: rgba(0, 122, 255, 0.12); color: var(--primary); }
.stat-icon.green { background: rgba(52, 199, 89, 0.12); color: var(--success); }
.stat-icon.orange { background: rgba(255, 149, 0, 0.12); color: var(--warning); }
.stat-icon.purple { background: rgba(88, 86, 214, 0.12); color: var(--secondary); }

.stat-info h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-info p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 内容网格 */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p { font-size: 15px; }

/* 操作按钮组 */
.action-btns {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover { background: rgba(0, 122, 255, 0.1); color: var(--primary); }
.action-btn.danger:hover { background: rgba(255, 59, 48, 0.1); color: var(--danger); }

/* 模态框 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.95);
    transition: transform 0.3s;
}

.modal-overlay.active .modal { transform: scale(1); }

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 { font-size: 17px; font-weight: 600; }

.modal-close {
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.modal-close:hover { background: rgba(0, 0, 0, 0.1); }

.modal-body { padding: 24px; max-height: 60vh; overflow-y: auto; }
.modal-footer { padding: 16px 24px; border-top: 1px solid rgba(0, 0, 0, 0.05); display: flex; justify-content: flex-end; gap: 10px; }

/* 响应式 - 后台 */
@media (max-width: 1200px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .content-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.active { transform: translateX(0); }
    
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
    
    .stats-grid { grid-template-columns: 1fr; }
}

/* ========== 用户中心专用样式 ========== */

.user-layout {
    display: flex;
    max-width: 1200px;
    margin: 100px auto 40px;
    padding: 0 24px;
    gap: 24px;
}

.user-sidebar {
    width: 240px;
    flex-shrink: 0;
}

.user-sidebar .card { position: sticky; top: 100px; }

.user-profile {
    text-align: center;
    padding: 24px 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.user-profile .avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    margin-bottom: 12px;
    border: 3px solid var(--glass-border);
}

.user-profile h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.user-profile p {
    font-size: 13px;
    color: var(--text-secondary);
}

.user-nav { padding: 12px; }
.user-nav ul { list-style: none; }

.user-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    font-size: 14px;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    margin-bottom: 4px;
}

.user-nav a:hover { background: rgba(0, 122, 255, 0.08); color: var(--primary); }
.user-nav a.active { background: rgba(0, 122, 255, 0.12); color: var(--primary); font-weight: 500; }
.user-nav a i { width: 18px; text-align: center; }

.user-main { flex: 1; min-width: 0; }

@media (max-width: 768px) {
    .user-layout {
        flex-direction: column;
        margin-top: 80px;
    }
    
    .user-sidebar { width: 100%; }
    .user-sidebar .card { position: static; }
}

/* ========== 前台页面专用样式 ========== */

.page-header {
    padding: 130px 24px 50px;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.page-header p {
    font-size: 16px;
    color: var(--text-secondary);
}

.page-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

/* 产品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.product-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
}

.product-cover {
    height: 140px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.product-cover .placeholder {
    font-size: 36px;
    color: var(--primary);
    opacity: 0.5;
}

.product-tag {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.9);
}

.product-tag.hot { color: var(--danger); }
.product-tag.new { color: var(--success); }
.product-tag.overseas { color: var(--primary); }

.product-body { padding: 16px; }

.product-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.product-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    height: 40px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    margin-bottom: 12px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.product-features span {
    font-size: 11px;
    padding: 3px 8px;
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary);
    border-radius: 4px;
}

.product-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.product-price .unit {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-tertiary);
}

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

@media (max-width: 768px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .page-header { padding: 110px 20px 30px; }
    .page-header h1 { font-size: 28px; }
}

@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr; }
}