/**
 * css/qg.css - 前台统一样式（青瓜色主题）
 * 
 * @package 青瓜CMS
 * @version V26.07.25
 */

/* ========== 导入 ========== */
@import url('variables.css');

/* ========== 重置样式 ========== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: #1a2a3a;
    background: #f0f7f0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    min-height: 100vh;
}

/* ========== 链接 ========== */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover {
    color: var(--primary-dark);
}

/* ========== 图片 ========== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========== 容器 ========== */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 640px) {
    .container { padding: 0 var(--spacing-6); }
}
@media (min-width: 1024px) {
    .container { padding: 0 var(--spacing-8); }
}

/* ============================================================
   导航栏 - 青瓜色主题
   ============================================================ */
.navbar {
    background: linear-gradient(135deg, #1a3a2a, #2d5a3d);
    padding: var(--spacing-3) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(46, 204, 113, 0.15);
    border-bottom: 3px solid var(--primary);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.navbar .logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--text-xl);
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.navbar .logo img {
    height: 40px;
    width: auto;
}

.navbar .logo-text {
    font-size: var(--text-xl);
    font-weight: 700;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li a {
    display: block;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.nav-menu li a:hover::after,
.nav-menu li a.active::after {
    width: 60%;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: #fff;
    background: rgba(46, 204, 113, 0.15);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

/* ========== 语言切换器 ========== */
.lang-selector {
    position: relative;
}

.lang-current {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
}

.lang-current:hover {
    border-color: var(--primary);
    color: #fff;
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 140px;
    background: #1a3a2a;
    border: 1px solid rgba(46, 204, 113, 0.2);
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    list-style: none;
    padding: var(--spacing-2) 0;
    margin: 0;
    display: none;
    z-index: 1001;
}

.lang-dropdown.open {
    display: block;
}

.lang-dropdown li a {
    display: block;
    padding: var(--spacing-1) var(--spacing-4);
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.lang-dropdown li a:hover,
.lang-dropdown li a.active {
    background: rgba(46, 204, 113, 0.15);
    color: #fff;
}

.lang-dropdown .divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.05);
    margin: var(--spacing-1) var(--spacing-3);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-5);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    font-family: var(--font-family);
}

.btn-primary {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    color: #fff;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(46, 204, 113, 0.4);
    color: #fff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.15);
}
.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: var(--success-dark);
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: var(--danger-dark);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: var(--spacing-1) var(--spacing-3);
    font-size: var(--text-sm);
}

.btn-lg {
    padding: var(--spacing-3) var(--spacing-8);
    font-size: var(--text-lg);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ============================================================
   卡片 - 青瓜色清新风格
   ============================================================ */
.card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 12px rgba(46, 204, 113, 0.06);
    border: 1px solid rgba(46, 204, 113, 0.08);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: 0 8px 30px rgba(46, 204, 113, 0.08);
    transform: translateY(-2px);
}

.card-header {
    padding: var(--spacing-4) var(--spacing-6);
    border-bottom: 1px solid rgba(46, 204, 113, 0.08);
    font-weight: 600;
    background: #f8fff8;
    color: #1a2a3a;
}

.card-body {
    padding: var(--spacing-6);
}

.card-footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid rgba(46, 204, 113, 0.08);
    background: #f8fff8;
}

/* ============================================================
   表单
   ============================================================ */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--spacing-2);
    color: #1a2a3a;
}

.form-label .required {
    color: var(--danger);
    margin-left: var(--spacing-1);
}

.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: #1a2a3a;
    background: #fff;
    border: 2px solid #e2eee2;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-family: var(--font-family);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.form-control.error {
    border-color: var(--danger);
}

.form-control.success {
    border-color: var(--success);
}

.form-control[disabled] {
    background: #f5faf5;
    cursor: not-allowed;
}

.form-hint {
    display: block;
    margin-top: var(--spacing-1);
    font-size: var(--text-sm);
    color: #94a3b8;
}

.form-error {
    display: block;
    margin-top: var(--spacing-1);
    font-size: var(--text-sm);
    color: var(--danger);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    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='%232ecc71' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--spacing-4) center;
    padding-right: var(--spacing-10);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4);
}

@media (max-width: 768px) {
    .form-row { grid-template-columns: 1fr; }
}

/* ============================================================
   表格
   ============================================================ */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.table th {
    background: #f8fff8;
    padding: var(--spacing-3) var(--spacing-4);
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--primary);
    color: #1a2a3a;
}

.table td {
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid #e2eee2;
    vertical-align: middle;
}

.table tbody tr:hover {
    background: #f5fcf5;
}

.table-striped tbody tr:nth-child(odd) {
    background: #fafffa;
}

/* ============================================================
   分页
   ============================================================ */
.pagination {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin: var(--spacing-6) 0;
    justify-content: center;
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--spacing-3);
    border-radius: var(--radius-md);
    border: 1px solid #d5e8d5;
    color: #475569;
    font-size: var(--text-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
}

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

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

.pagination .disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) 0;
    font-size: var(--text-sm);
    color: #94a3b8;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: #475569;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb .separator {
    color: #d5e8d5;
}

/* ============================================================
   消息通知
   ============================================================ */
.alert {
    padding: var(--spacing-4) var(--spacing-6);
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    margin-bottom: var(--spacing-4);
}

.alert-success {
    background: #d1fae5;
    border-color: #34d399;
    color: #065f46;
}

.alert-warning {
    background: #fef3c7;
    border-color: #fbbf24;
    color: #92400e;
}

.alert-danger {
    background: #fee2e2;
    border-color: #f87171;
    color: #991b1b;
}

.alert-info {
    background: #dbeafe;
    border-color: #60a5fa;
    color: #1e40af;
}

/* ============================================================
   徽章
   ============================================================ */
.badge {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--primary-bg);
    color: var(--primary);
}

.badge-success {
    background: var(--success-bg);
    color: var(--success);
}

.badge-warning {
    background: var(--warning-bg);
    color: var(--warning);
}

.badge-danger {
    background: var(--danger-bg);
    color: var(--danger);
}

.badge-gray {
    background: #e8f0e8;
    color: #64748b;
}

/* ============================================================
   Banner轮播 - 青瓜色风格
   ============================================================ */
.banner-slider {
    position: relative;
    overflow: hidden;
    height: 420px;
    background: linear-gradient(135deg, #1a3a2a, #2d5a3d);
    border-radius: 0 0 30px 30px;
}

.banner-track {
    display: flex;
    transition: transform 0.5s ease;
    height: 100%;
}

.banner-slide {
    flex: 0 0 100%;
    height: 100%;
    position: relative;
}

.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.7;
}

.banner-caption {
    position: absolute;
    bottom: 80px;
    left: 10%;
    color: #fff;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.banner-caption h2 {
    font-size: 38px;
    margin-bottom: 10px;
    font-weight: 700;
}

.banner-caption p {
    font-size: 18px;
    opacity: 0.9;
}

.banner-prev,
.banner-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(46, 204, 113, 0.3);
    color: #fff;
    border: none;
    width: 44px;
    height: 64px;
    font-size: 24px;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    backdrop-filter: blur(4px);
}

.banner-prev:hover,
.banner-next:hover {
    background: rgba(46, 204, 113, 0.5);
}

.banner-prev {
    left: 0;
    border-radius: 0 8px 8px 0;
}

.banner-next {
    right: 0;
    border-radius: 8px 0 0 8px;
}

.banner-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.banner-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s;
}

.banner-dots .dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

@media (max-width: 768px) {
    .banner-slider {
        height: 280px;
        border-radius: 0 0 16px 16px;
    }
    .banner-caption h2 {
        font-size: 24px;
    }
    .banner-caption p {
        font-size: 15px;
    }
    .banner-prev,
    .banner-next {
        width: 32px;
        height: 44px;
        font-size: 18px;
    }
}

/* ============================================================
   新闻网格 - 青瓜色风格
   ============================================================ */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-6);
}

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(46, 204, 113, 0.08);
    overflow: hidden;
    transition: all 0.3s;
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(46, 204, 113, 0.1);
    border-color: var(--primary);
}

.news-image {
    display: block;
    height: 200px;
    overflow: hidden;
}

.news-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.news-card:hover .news-image img {
    transform: scale(1.05);
}

.news-body {
    padding: var(--spacing-4) var(--spacing-5);
}

.news-body h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-2);
}

.news-body h3 a {
    color: #1a2a3a;
    text-decoration: none;
}

.news-body h3 a:hover {
    color: var(--primary);
}

.news-body p {
    font-size: var(--text-sm);
    color: #475569;
    line-height: var(--leading-relaxed);
    margin-bottom: var(--spacing-3);
}

.news-meta {
    font-size: var(--text-sm);
    color: #94a3b8;
    display: flex;
    gap: var(--spacing-4);
}

/* ============================================================
   产品网格 - 青瓜色风格
   ============================================================ */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-5);
}

.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(46, 204, 113, 0.08);
    overflow: hidden;
    transition: all 0.3s;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(46, 204, 113, 0.1);
    border-color: var(--primary);
}

.product-image {
    display: block;
    height: 200px;
    overflow: hidden;
    position: relative;
    background: #f5fcf5;
}

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

.product-image .product-badge {
    position: absolute;
    top: var(--spacing-2);
    right: var(--spacing-2);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
    background: var(--danger);
    color: #fff;
}

.product-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: #c5dcc5;
}

.product-body {
    padding: var(--spacing-4);
}

.product-body h3 {
    font-size: var(--text-base);
    margin-bottom: var(--spacing-1);
}

.product-body h3 a {
    color: #1a2a3a;
    text-decoration: none;
}

.product-body h3 a:hover {
    color: var(--primary);
}

.product-body p {
    font-size: var(--text-sm);
    color: #64748b;
    margin-bottom: var(--spacing-3);
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-price {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--danger);
}

/* ============================================================
   统计条 - 青瓜色风格
   ============================================================ */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-4);
    padding: var(--spacing-6) 0;
    margin-bottom: var(--spacing-4);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-4);
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(46, 204, 113, 0.08);
    transition: all 0.3s;
}
.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(46, 204, 113, 0.08);
}

.stat-item .stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.stat-item .stat-label {
    font-size: 14px;
    color: #64748b;
    margin-top: 4px;
}

/* ============================================================
   特色功能 - 青瓜色风格
   ============================================================ */
.features-section {
    padding: var(--spacing-10) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-6);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-6) var(--spacing-4);
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(46, 204, 113, 0.08);
    transition: all 0.3s;
}
.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(46, 204, 113, 0.1);
    border-color: var(--primary);
}

.feature-card .feature-icon {
    font-size: 48px;
    display: block;
    margin-bottom: var(--spacing-3);
}

.feature-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-2);
    color: #1a2a3a;
}

.feature-card p {
    font-size: var(--text-sm);
    color: #64748b;
    line-height: var(--leading-relaxed);
}

/* ============================================================
   通用 - 青瓜色风格
   ============================================================ */
.section {
    padding: var(--spacing-10) 0;
    border-bottom: 1px solid rgba(46, 204, 113, 0.06);
}
.section:last-child {
    border-bottom: none;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-5);
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: #1a2a3a;
    margin: 0;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 4px;
}

.section-more {
    color: var(--primary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
}
.section-more:hover {
    text-decoration: underline;
}

.text-muted {
    color: #94a3b8;
    text-align: center;
    padding: var(--spacing-10) 0;
}

/* ============================================================
   页脚 - 青瓜色风格
   ============================================================ */
.footer {
    background: linear-gradient(135deg, #1a3a2a, #0f2a1a);
    color: rgba(255, 255, 255, 0.6);
    padding: var(--spacing-10) 0 var(--spacing-6);
    margin-top: var(--spacing-10);
    border-top: 3px solid var(--primary);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-8);
}

.footer h4 {
    color: #fff;
    margin-bottom: var(--spacing-4);
    font-size: var(--text-lg);
    position: relative;
    padding-bottom: var(--spacing-2);
}
.footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary);
}

.footer a {
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
    text-decoration: none;
}

.footer a:hover {
    color: var(--primary);
}

.footer ul {
    list-style: none;
    padding: 0;
}

.footer ul li {
    padding: var(--spacing-1) 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: var(--spacing-6);
    margin-top: var(--spacing-8);
    text-align: center;
    font-size: var(--text-sm);
}

/* ============================================================
   工具类
   ============================================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: #94a3b8; }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }

.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }

/* ============================================================
   移动端菜单
   ============================================================ */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--text-2xl);
    cursor: pointer;
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-2);
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -320px;
    width: 280px;
    height: 100%;
    background: #1a3a2a;
    z-index: 1002;
    padding: var(--spacing-6);
    box-shadow: -4px 0 40px rgba(0,0,0,0.3);
    transition: right 0.3s ease;
    overflow-y: auto;
}

.mobile-menu.open {
    right: 0;
}

.mobile-close {
    background: none;
    border: none;
    font-size: var(--text-2xl);
    cursor: pointer;
    color: rgba(255, 255, 255, 0.6);
    float: right;
    padding: var(--spacing-2);
}

.mobile-menu ul {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-8);
}

.mobile-menu ul li a {
    display: block;
    padding: var(--spacing-3) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.mobile-menu ul li a:hover,
.mobile-menu ul li a.active {
    color: var(--primary);
}

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    display: none;
}

.mobile-overlay.active {
    display: block;
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .menu-toggle { display: block; }
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 768px) {
    .news-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer { margin-top: var(--spacing-6); padding: var(--spacing-6) 0 var(--spacing-4); }
    .section-title { font-size: 22px; }
    .section { padding: var(--spacing-6) 0; }
    .features-grid { grid-template-columns: 1fr 1fr; }
    .stats-bar { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: 1fr; }
}

/* ============================================================
   暗色模式 - 可选的青瓜色暗色版
   ============================================================ */
@media (prefers-color-scheme: dark) {
    body {
        background: #0f1a15;
        color: #d5e8d5;
    }
    .navbar {
        background: linear-gradient(135deg, #0f1a15, #1a3a2a);
    }
    .card {
        background: #1a2a22;
        border-color: rgba(46, 204, 113, 0.1);
    }
    .card-header {
        background: #1f3028;
        border-color: rgba(46, 204, 113, 0.08);
        color: #d5e8d5;
    }
    .card-footer {
        background: #1f3028;
        border-color: rgba(46, 204, 113, 0.08);
    }
    .news-card {
        background: #1a2a22;
        border-color: rgba(46, 204, 113, 0.08);
    }
    .product-card {
        background: #1a2a22;
        border-color: rgba(46, 204, 113, 0.08);
    }
    .product-card h3 a {
        color: #d5e8d5;
    }
    .news-body h3 a {
        color: #d5e8d5;
    }
    .form-control {
        background: #1a2a22;
        border-color: #2a4a3a;
        color: #d5e8d5;
    }
    .form-control:focus {
        border-color: var(--primary);
    }
    .table th {
        background: #1f3028;
        border-color: var(--primary);
        color: #d5e8d5;
    }
    .table td {
        border-color: #2a4a3a;
        color: #b5c8b5;
    }
    .table tbody tr:hover {
        background: #1f3028;
    }
    .stat-item {
        background: #1a2a22;
        border-color: rgba(46, 204, 113, 0.08);
    }
    .stat-item .stat-label {
        color: #8a9a8a;
    }
    .feature-card {
        background: #1a2a22;
        border-color: rgba(46, 204, 113, 0.08);
    }
    .feature-card h3 {
        color: #d5e8d5;
    }
    .feature-card p {
        color: #8a9a8a;
    }
    .mobile-menu {
        background: #0f1a15;
    }
    .mobile-menu ul li a {
        color: rgba(255, 255, 255, 0.6);
        border-color: rgba(255, 255, 255, 0.05);
    }
    .footer {
        background: linear-gradient(135deg, #0a1a10, #0f1a15);
    }
    .footer h4 {
        color: #d5e8d5;
    }
    .breadcrumb a {
        color: #8a9a8a;
    }
    .btn-secondary {
        background: rgba(255, 255, 255, 0.05);
    }
    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.1);
    }
}