/* ============================================
   拼豆图纸生成平台 - 主样式表
   现代极简风格，响应式设计
   ============================================ */

/* CSS 变量 */
:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --primary-light: #A29BFE;
    --secondary: #00CEC9;
    --accent: #FD79A8;
    --success: #00B894;
    --warning: #FDCB6E;
    --danger: #FF7675;
    --dark: #2D3436;
    --gray-900: #2D3436;
    --gray-700: #495057;
    --gray-500: #868E96;
    --gray-300: #DEE2E6;
    --gray-200: #E9ECEF;
    --gray-100: #F8F9FA;
    --gray-50: #FCFCFC;
    --white: #FFFFFF;
    --bg: #F8F9FA;
    --card-bg: #FFFFFF;
    --text: #2D3436;
    --text-secondary: #636E72;
    --border: #E9ECEF;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    --max-width: 1200px;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

img { max-width: 100%; display: block; }

ul { list-style: none; }

/* Layout */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }
.row { display: flex; flex-wrap: wrap; gap: 24px; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.4;
    font-family: inherit;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--primary-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}
.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}
.btn-secondary:hover {
    background: var(--gray-300);
}
.btn-lg { padding: 14px 32px; font-size: 17px; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: var(--dark);
}
.logo img { border-radius: 8px; }
.logo:hover { color: var(--primary); }

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
}
.main-nav a {
    display: block;
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
}
.main-nav a:hover, .main-nav a.active {
    color: var(--primary);
    background: var(--gray-100);
}
.nav-dropdown { position: relative; }
.nav-dropdown > a { cursor: pointer; }
.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: #fff;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
    padding: 8px;
    flex-direction: column;
    gap: 2px;
}
.nav-dropdown:hover .dropdown-menu { display: flex; }
.dropdown-menu a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
}
.dropdown-menu a:hover { background: var(--gray-100); }

.header-cta { margin-left: 12px; }

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 22px;
    color: var(--text);
    cursor: pointer;
}

/* Main */
.site-main { min-height: calc(100vh - 64px - 280px); }

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 50%, #6C5CE7 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}
.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(253,121,168,0.15) 0%, transparent 70%);
    border-radius: 50%;
}
.hero-content { position: relative; z-index: 1; max-width: 720px; margin: 0 auto; }
.hero h1 { font-size: 42px; font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.hero p { font-size: 18px; opacity: 0.9; margin-bottom: 32px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero .btn-primary {
    background: #fff;
    color: var(--primary);
}
.hero .btn-primary:hover { background: var(--gray-100); }
.hero .btn-outline {
    border-color: rgba(255,255,255,0.5);
    color: #fff;
}
.hero .btn-outline:hover { background: rgba(255,255,255,0.15); }

.hero-stats {
    display: flex;
    gap: 40px;
    justify-content: center;
    margin-top: 48px;
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 32px; font-weight: 800; }
.hero-stat .label { font-size: 14px; opacity: 0.8; }

/* Section */
.section { padding: 64px 0; }
.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { font-size: 32px; font-weight: 700; margin-bottom: 12px; }
.section-header p { color: var(--text-secondary); font-size: 17px; }

/* Features */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}
.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 20px;
}
.feature-icon.purple { background: rgba(108,92,231,0.1); color: var(--primary); }
.feature-icon.pink { background: rgba(253,121,168,0.1); color: var(--accent); }
.feature-icon.teal { background: rgba(0,206,201,0.1); color: var(--secondary); }
.feature-icon.yellow { background: rgba(253,203,110,0.1); color: #E17055; }
.feature-card h3 { font-size: 20px; margin-bottom: 10px; }
.feature-card p { color: var(--text-secondary); font-size: 15px; }

/* Steps */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.step-card {
    text-align: center;
    position: relative;
}
.step-num {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}
.step-card h3 { font-size: 18px; margin-bottom: 10px; }
.step-card p { color: var(--text-secondary); font-size: 15px; }

/* Gallery Grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}
.gallery-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
    cursor: pointer;
}
.gallery-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.gallery-card .card-image {
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--gray-100);
    position: relative;
}
.gallery-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #fff;
    transition: transform 0.3s;
}
.gallery-card:hover .card-image img { transform: scale(1.05); }
.gallery-card .card-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(108,92,231,0.9);
    color: #fff;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.gallery-card .card-body { padding: 16px; }
.gallery-card .card-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.gallery-card .card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--gray-500);
}
.gallery-card .card-meta .meta-tag {
    background: var(--gray-100);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Gallery Toolbar */
.gallery-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}
.search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
}
.search-box input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}
.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,92,231,0.1);
}
.search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
}

.category-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.cat-tab {
    padding: 6px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    background: #fff;
    color: var(--text-secondary);
}
.cat-tab:hover, .cat-tab.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* Pagination */
.pagination { margin-top: 40px; }
.pagination ul {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}
.pagination li a, .pagination li span {
    display: block;
    min-width: 38px;
    height: 38px;
    line-height: 38px;
    text-align: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
    background: #fff;
    padding: 0 12px;
}
.pagination li a:hover { border-color: var(--primary); color: var(--primary); }
.pagination li.active span {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.pagination li.disabled span { color: var(--gray-300); cursor: not-allowed; }
.pagination li.ellipsis span { border: none; background: none; }

/* Generate Page */
.generate-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
}
.generate-form-card, .generate-result-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 15px;
}
.form-group label .required { color: var(--danger); }
.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: #fff;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108,92,231,0.1);
}
textarea.form-control { resize: vertical; min-height: 80px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-hint { font-size: 13px; color: var(--gray-500); margin-top: 4px; }

.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}
.upload-area:hover { border-color: var(--primary); background: var(--gray-50); }
.upload-area.has-file { border-color: var(--success); border-style: solid; }
.upload-area i { font-size: 32px; color: var(--gray-500); margin-bottom: 8px; }
.upload-area p { color: var(--text-secondary); font-size: 14px; }
.upload-preview { max-width: 150px; margin: 8px auto 0; }
.upload-preview img { width: 100%; border-radius: var(--radius-sm); }

/* Result Area */
.result-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}
.result-placeholder i { font-size: 64px; margin-bottom: 16px; }
.result-placeholder p { font-size: 15px; }

.result-loading {
    text-align: center;
    padding: 40px;
}
.result-loading .spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 20px;
}
@keyframes spin { to { transform: rotate(360deg); } }

.result-progress-bar {
    width: 100%;
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
    margin: 16px 0;
}
.result-progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 0.5s;
}

.result-image {
    width: 100%;
    border-radius: var(--radius-sm);
    background: #fff;
}
.result-actions {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
}
.result-info {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.result-info dl {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 8px 16px;
    font-size: 14px;
}
.result-info dt { color: var(--gray-500); }
.result-info dd { font-weight: 500; }

/* Pattern Detail */
.detail-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.detail-image-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.detail-image-card img {
    width: 100%;
    display: block;
    background: #fff;
}
.detail-info-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.detail-info-card h1 { font-size: 26px; margin-bottom: 16px; }
.detail-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 24px 0;
}
.detail-meta-item {
    background: var(--gray-50);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
}
.detail-meta-item .label { font-size: 13px; color: var(--gray-500); margin-bottom: 4px; }
.detail-meta-item .value { font-size: 16px; font-weight: 600; }
.detail-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.detail-prompt {
    margin-top: 24px;
    padding: 16px;
    background: var(--gray-50);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-secondary);
    max-height: 200px;
    overflow-y: auto;
}

/* Templates */
.template-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}
.template-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.template-card h3 { font-size: 18px; margin-bottom: 8px; }
.template-card .template-cat {
    display: inline-block;
    background: rgba(108,92,231,0.1);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 12px;
}
.template-preview {
    background: var(--gray-50);
    padding: 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    margin: 12px 0;
    max-height: 120px;
    overflow-y: auto;
    line-height: 1.5;
}
.template-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--gray-500);
    margin-bottom: 16px;
}

/* About */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}
.about-content h2 { font-size: 24px; margin: 32px 0 16px; }
.about-content p { color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}
.faq-item h4 { font-size: 17px; margin-bottom: 8px; cursor: pointer; }
.faq-item p { color: var(--text-secondary); display: none; }
.faq-item.open p { display: block; }

.contact-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    margin-top: 32px;
}
.contact-card i { font-size: 32px; color: var(--primary); margin-bottom: 16px; }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--gray-500);
}
.empty-state i { font-size: 64px; margin-bottom: 16px; }
.empty-state h3 { font-size: 20px; color: var(--text); margin-bottom: 8px; }
.empty-state p { font-size: 15px; }

/* Footer */
.site-footer {
    background: var(--dark);
    color: #fff;
    padding: 48px 0 24px;
    margin-top: 64px;
}
.footer-cols {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 32px;
}
.footer-brand h3 { font-size: 20px; margin-bottom: 12px; }
.footer-brand p { color: rgba(255,255,255,0.7); font-size: 14px; line-height: 1.6; }
.footer-col h4 { font-size: 16px; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col a { color: rgba(255,255,255,0.7); font-size: 14px; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}
.footer-bottom p { margin-bottom: 4px; }
.footer-bottom a { color: rgba(255,255,255,0.5); }

/* Toast */
.toast {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-size: 15px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s;
    max-width: 400px;
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }

/* Responsive */
@media (max-width: 768px) {
    .header-cta { display: none; }
    .main-nav { display: none; }
    .main-nav.open {
        display: block;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }
    .main-nav.open ul { flex-direction: column; padding: 8px; }
    .main-nav.open .nav-dropdown .dropdown-menu {
        position: static;
        display: flex;
        box-shadow: none;
        padding-left: 16px;
    }
    .mobile-menu-toggle { display: block; }

    .hero { padding: 48px 0; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 16px; }
    .hero-stats { gap: 20px; }
    .hero-stat .num { font-size: 24px; }

    .section { padding: 48px 0; }
    .section-header h2 { font-size: 26px; }

    .steps-grid { grid-template-columns: 1fr; }

    .generate-layout { grid-template-columns: 1fr; }
    .detail-layout { grid-template-columns: 1fr; }

    .footer-cols { grid-template-columns: 1fr; gap: 24px; }

    .form-row { grid-template-columns: 1fr; }
    .detail-meta { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 24px; }
    .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .gallery-card .card-body { padding: 12px; }
    .gallery-card .card-title { font-size: 14px; }
    .pagination li a, .pagination li span { min-width: 32px; height: 32px; line-height: 32px; font-size: 13px; padding: 0 8px; }
}

/* ============================================
   用户菜单 (导航栏)
   ============================================ */
.nav-user { margin-left: 8px; }
.nav-login {
    display: inline-flex; align-items: center; padding: 8px 16px;
    background: var(--primary); color: #fff; border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 500;
}
.nav-login:hover { background: var(--primary-dark); color: #fff; }
.user-menu { position: relative; }
.user-menu-trigger {
    display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px;
    color: var(--text); border-radius: var(--radius-sm); font-size: 14px; font-weight: 500;
}
.user-menu-trigger:hover { background: var(--gray-100); }
.user-menu:hover .user-dropdown { display: block; }
.user-dropdown {
    display: none; position: absolute; right: 0; top: 100%; margin-top: 8px;
    background: var(--card-bg); border-radius: var(--radius); min-width: 180px;
    box-shadow: var(--shadow-md); padding: 8px 0; z-index: 100; border: 1px solid var(--border);
}
.user-dropdown a {
    display: flex; align-items: center; gap: 8px; padding: 10px 16px;
    color: var(--text); font-size: 14px;
}
.user-dropdown a:hover { background: var(--gray-100); color: var(--primary); }
.user-dropdown a i { width: 16px; text-align: center; }

/* ============================================
   登录 / 注册页
   ============================================ */
.auth-section { padding: 60px 0; }
.auth-card {
    max-width: 420px; margin: 0 auto; background: var(--card-bg);
    border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 32px;
}
.auth-tabs { display: flex; gap: 8px; margin-bottom: 24px; background: var(--gray-100); padding: 4px; border-radius: var(--radius-sm); }
.auth-tab {
    flex: 1; padding: 10px; border: none; background: transparent; cursor: pointer;
    border-radius: var(--radius-sm); font-size: 15px; font-weight: 500; color: var(--text-secondary);
    transition: var(--transition);
}
.auth-tab.active { background: var(--white); color: var(--primary); box-shadow: var(--shadow-sm); }
.auth-form .form-group { margin-bottom: 18px; }
.auth-hint { text-align: center; margin-top: 16px; font-size: 14px; color: var(--text-secondary); }
.auth-hint a, .switch-tab { color: var(--primary); cursor: pointer; }

/* ============================================
   用户中心
   ============================================ */
.user-section { padding: 48px 0; }
.user-layout { display: grid; grid-template-columns: 280px 1fr; gap: 32px; align-items: start; }
.user-sidebar { position: sticky; top: 24px; }
.user-card {
    background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow);
    padding: 24px; text-align: center; margin-bottom: 16px;
}
.user-avatar {
    width: 72px; height: 72px; border-radius: 50%; margin: 0 auto 12px;
    background: var(--primary-light); color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 32px; overflow: hidden;
}
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-name { font-size: 18px; font-weight: 600; }
.user-username { color: var(--text-secondary); font-size: 13px; margin-top: 2px; }
.user-meta { color: var(--gray-500); font-size: 12px; margin-top: 6px; }
.user-nav { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.user-nav-item {
    display: flex; align-items: center; gap: 10px; padding: 14px 20px; color: var(--text);
    font-size: 15px; border-bottom: 1px solid var(--border); transition: var(--transition);
}
.user-nav-item:last-child { border-bottom: none; }
.user-nav-item:hover { background: var(--gray-100); color: var(--primary); }
.user-nav-item.active { background: var(--primary); color: #fff; font-weight: 500; }
.user-nav-item i { width: 18px; text-align: center; }
.user-nav-item.admin-link { color: var(--primary); }

.user-content { min-height: 400px; }
.tab-pane { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.user-tab-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.user-tab-header h2 { font-size: 22px; }

.profile-form-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.profile-form { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.profile-form h3 { font-size: 16px; margin-bottom: 16px; }

/* ============================================
   卡片收藏/点赞按钮 + 统计
   ============================================ */
.gallery-card .card-image { position: relative; overflow: hidden; }
.card-actions {
    position: absolute; top: 10px; right: 10px; display: flex; gap: 8px;
    opacity: 0; transform: translateY(-4px); transition: var(--transition);
}
.gallery-card:hover .card-actions { opacity: 1; transform: none; }
.card-action-btn {
    width: 34px; height: 34px; border-radius: 50%; border: none; cursor: pointer;
    background: rgba(255,255,255,0.9); color: var(--gray-700); font-size: 14px;
    display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-sm);
    transition: var(--transition); backdrop-filter: blur(4px);
}
.card-action-btn:hover { background: #fff; transform: scale(1.1); }
.fav-btn.active { color: var(--danger); background: #fff; }
.like-btn.active { color: var(--primary); background: #fff; }
.card-stats {
    display: flex; gap: 16px; padding: 8px 0 0; color: var(--gray-500); font-size: 13px;
}
.card-stats span { display: inline-flex; align-items: center; gap: 4px; }
.card-stats i { font-size: 13px; }

/* 详情页操作按钮变体 */
.detail-actions .fav-btn.active { background: var(--danger); border-color: var(--danger); color: #fff; }
.detail-actions .like-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 后台登录页简洁样式 */
.admin-login-wrap { max-width: 380px; margin: 80px auto; background: var(--card-bg); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); padding: 36px; }
.admin-login-wrap h2 { text-align: center; margin-bottom: 24px; }

/* 后台布局 */
.admin-layout { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.admin-sidebar { background: var(--dark); color: #fff; padding: 24px 0; }
.admin-sidebar .admin-logo { padding: 0 24px 20px; font-size: 18px; font-weight: 700; border-bottom: 1px solid rgba(255,255,255,0.1); margin-bottom: 16px; }
.admin-sidebar a { display: flex; align-items: center; gap: 10px; padding: 12px 24px; color: rgba(255,255,255,0.75); font-size: 14px; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: rgba(255,255,255,0.1); color: #fff; }
.admin-main { padding: 32px; background: var(--bg); }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.admin-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; margin-bottom: 32px; }
.admin-stat-card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.admin-stat-card .num { font-size: 32px; font-weight: 700; color: var(--primary); }
.admin-stat-card .label { color: var(--text-secondary); font-size: 14px; margin-top: 4px; }
.admin-table { width: 100%; background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.admin-table table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.admin-table th { background: var(--gray-100); font-weight: 600; color: var(--text-secondary); }
.admin-table tr:hover td { background: var(--gray-50); }
.admin-table img { width: 60px; height: 60px; object-fit: cover; border-radius: var(--radius-sm); }
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; }
.badge-success { background: rgba(0,184,148,0.12); color: var(--success); }
.badge-warning { background: rgba(253,203,110,0.18); color: #e1a500; }
.badge-danger { background: rgba(255,118,117,0.12); color: var(--danger); }
.badge-info { background: rgba(9,132,227,0.12); color: #0984e3; }
.badge-primary { background: rgba(108,92,231,0.14); color: var(--primary); }
.admin-create-card { background:#fff; border:1px solid var(--border); border-radius:12px; padding:18px 20px; margin-bottom:20px; }
.admin-create-card h3 { font-size:15px; margin-bottom:14px; color:var(--text); }
.admin-create-card h3 i { color:var(--primary); margin-right:6px; }
.admin-form-row { display:flex; flex-wrap:wrap; gap:10px; align-items:center; }
.admin-form-row .form-control { margin:0; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.text-danger { color: var(--danger); }

/* 后台筛选栏 */
.admin-filter { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 20px; margin-bottom: 20px; }
.admin-filter .form-control { margin: 0; }
.admin-filter-total { margin-left: auto; color: var(--text-secondary); font-size: 13px; }
/* 后台操作列 */
.admin-actions { white-space: nowrap; }
.admin-actions .btn { margin: 2px 2px; }
.admin-table td.admin-actions form { margin: 0; }

/* 响应式 */
@media (max-width: 768px) {
    .user-layout { grid-template-columns: 1fr; }
    .user-sidebar { position: static; }
    .profile-form-wrap { grid-template-columns: 1fr; }
    .admin-layout { grid-template-columns: 1fr; }
    .admin-sidebar { display: none; }
    .card-actions { opacity: 1; transform: none; }
}