/* 主题变量定义 */
:root {
    /* 默认主题颜色 */
    --primary-color: #0F172A;
    --secondary-color: #334155;
    --accent-color: #0369A1;
    --background-color: #F8FAFC;
    --text-color: #020617;
    --card-background: #FFFFFF;
    --border-color: #E2E8F0;
    --hover-background: #F1F5F9;
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --footer-background: #0F172A;
    --footer-text: #F8FAFC;
    --footer-secondary: #94A3B8;
}

/* 黑色主题 */
body.theme-dark {
    --primary-color: #0F172A;
    --secondary-color: #1E293B;
    --accent-color: #0EA5E9;
    --background-color: #0F172A;
    --text-color: #F8FAFC;
    --card-background: #1E293B;
    --border-color: #334155;
    --hover-background: #334155;
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --footer-background: #0F172A;
    --footer-text: #F8FAFC;
    --footer-secondary: #94A3B8;
}

/* 蓝色主题 */
body.theme-blue {
    --primary-color: #1E40AF;
    --secondary-color: #3B82F6;
    --accent-color: #60A5FA;
    --background-color: #F8FAFC;
    --text-color: #1E293B;
    --card-background: #FFFFFF;
    --border-color: #E2E8F0;
    --hover-background: #F0F9FF;
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --footer-background: #1E40AF;
    --footer-text: #FFFFFF;
    --footer-secondary: #93C5FD;
}

/* 绿色主题 */
body.theme-green {
    --primary-color: #065F46;
    --secondary-color: #10B981;
    --accent-color: #34D399;
    --background-color: #F8FAFC;
    --text-color: #1E293B;
    --card-background: #FFFFFF;
    --border-color: #E2E8F0;
    --hover-background: #ECFDF5;
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;
    --footer-background: #065F46;
    --footer-text: #FFFFFF;
    --footer-secondary: #6EE7B7;
}

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

body {
    font-family: 'Be Vietnam Pro', 'Noto Sans', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: all 0.3s ease;
}

/* 容器样式 */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background-color: var(--card-background);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

/* 主题切换器 */
.theme-switcher select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--card-background);
    color: var(--text-color);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.theme-switcher select:hover {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.navbar-logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.navbar-logo:hover {
    color: var(--accent-color);
}

.navbar-menu {
    display: flex;
    list-style: none;
}

.navbar-menu li {
    margin-left: 15px;
}

.navbar-menu a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.2s ease;
    padding: 6px 12px;
    border-radius: 8px;
}

.navbar-menu a:hover {
    color: var(--accent-color);
    background-color: var(--hover-background);
}

.navbar-menu a.active {
    background-color: var(--accent-color);
    color: white;
}

/* 公告 */
.announcement {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    padding: 6px 0;
    text-align: center;
    font-size: 13px;
    border-bottom: 1px solid rgba(59, 130, 246, 0.2);
}

/* 广告位 */
.advertisement-section {
    margin: 30px 0;
}

.advertisement-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.advertisement-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.advertisement-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.advertisement-item img {
    width: 100%;
    height: 100px;
    object-fit: contain;
    transition: transform 0.3s ease;
    background-color: #f0f0f0;
}

.advertisement-item:hover img {
    transform: scale(1.05);
}

/* 卡片展示 */
.cards-section {
    margin: 40px 0;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 25px;
    margin-bottom: 30px;
}

.card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.card {
    background-color: var(--card-background);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 推荐卡片样式 */
.card-recommended {
    border: 4px solid #FF9800;
}

/* 普通卡片样式 */
.card-normal {
    border: 4px solid #E91E63;
}

.card-image-container {
    position: relative;
    width: 100%;
    padding-top: 150%; /* 2:3 比例 */
    overflow: hidden;
}

.card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.card-country {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.1);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    z-index: 5;
}

.card-site-id {
    position: absolute;
    top: 35px;
    left: 10px;
    background-color: rgba(0, 0, 0, 0.45);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    z-index: 5;
    /* border: 2px solid #FF6B6B; */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.card-new-badge {
    position: absolute;
    bottom: 10px;
    right: 170px;
    background-color: #EF4444;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
    animation: pulse 2s infinite;
    z-index: 10;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

.card-badges {
    position: absolute;
    bottom: 10px;
    right: 10px;
    display: flex;
    gap: 8px;
    z-index: 10;
    flex-direction: row;
    align-items: center;
}

.card-badges > div {
    display: inline-block !important;
    white-space: nowrap !important;
    padding: 4px 8px !important;
    border-radius: 4px !important;
    font-size: 12px !important;
    font-weight: 500 !important;
}

.card-verified-badge {
    background-color: #10B981 !important;
    color: white !important;
}

.card-green-badge {
    background-color: #10B981 !important;
    color: white !important;
}

.card-new-badge {
    background-color: #EF4444 !important;
    color: white !important;
    font-weight: bold !important;
    animation: pulse 2s infinite !important;
}

.card-stat i {
    font-size: 12px;
    vertical-align: middle;
    margin-right: 3px;
}

/* 认证标记容器 */
.verification-badges {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 10;
    padding: 0;
}

/* 认证标记 */
.verification-badge {
    position: absolute;
    top: 0;
    right: 0;
}

/* 新人标记 */
.verification-badge.new-badge {
    z-index: 13;
    top: -1px;
    right: -1px;
}

/* 绿色标记 */
.verification-badge.green-badge {
    z-index: 12;
    top: -1px;
    right: -6px;
    width: 65px;
    height: auto;
}

/* 真人核验标记 */
.verification-badge.verify-badge {
    z-index: 11;
    top: -1px;
    right: 2px;
    width: 80px;
    height: auto;
}

.badge-image-new {
    width: 36px;
    height: auto;
    object-fit: contain;
    display: block;
}

.badge-image-green {
    width: 62px;
    height: auto;
    object-fit: contain;
    display: block;
}

.badge-image-verify {
    width: 83px;
    height: auto;
    object-fit: contain;
    display: block;
}

/* 评论数量位置调整（移到左下角） */
.card-image-container .card-stats {
    position: absolute;
    bottom: 10px;
    left: 10px;
    display: flex;
    gap: 10px;
    z-index: 10;
}

.card-image-container .card-stats .card-stat {
    background-color: rgba(0, 0, 0, 0.1);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 0;
}

.card-content {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-nickname {
    font-size: 16px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 10px;
    line-height: 1.3;
}

.card-info {
    font-size: 13px;
    color: var(--secondary-color);
    margin-bottom: 8px;
    line-height: 1.4;
}

.card-region {
    font-size: 13px;
    color: var(--secondary-color);
    margin-bottom: 12px;
    line-height: 1.4;
}

.card-price {
    font-size: 16px;
    font-weight: bold;
    color: var(--accent-color);
    line-height: 1.3;
    margin-top: auto;
    padding-top: 10px;
}

/* 加载更多 */
.load-more-container {
    text-align: center;
    margin: 40px 0;
}

.load-more-btn {
    background-color: #F1F5F9;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    padding: 12px 30px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.load-more-btn:hover {
    background-color: #E2E8F0;
    transform: translateY(-2px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 登录表单 */
.login-container {
    max-width: 400px;
    margin: 60px auto;
    background-color: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid #F1F5F9;
}

.login-title {
    font-size: 24px;
    font-weight: bold;
    color: #0F172A;
    margin-bottom: 30px;
    text-align: center;
    padding-bottom: 15px;
    border-bottom: 2px solid #E2E8F0;
}

/* 注册表单 */
.register-container {
    max-width: 400px;
    margin: 60px auto;
    background-color: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid #F1F5F9;
}

.register-title {
    font-size: 24px;
    font-weight: bold;
    color: #0F172A;
    margin-bottom: 30px;
    text-align: center;
    padding-bottom: 15px;
    border-bottom: 2px solid #E2E8F0;
}

/* 个人中心 */
.personal-container {
    max-width: 800px;
    margin: 60px auto;
    background-color: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid #F1F5F9;
}

.personal-title {
    font-size: 24px;
    font-weight: bold;
    color: #0F172A;
    margin-bottom: 30px;
    text-align: center;
    padding-bottom: 15px;
    border-bottom: 2px solid #E2E8F0;
}

.personal-avatar {
    text-align: center;
    margin-bottom: 30px;
}

.avatar-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #E2E8F0;
}

/* 表单样式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #334155;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.2s ease;
    font-family: inherit;
}

.form-input:focus {
    outline: none;
    border-color: #0369A1;
    box-shadow: 0 0 0 3px rgba(3, 105, 161, 0.1);
}

.form-error {
    color: #EF4444;
    font-size: 12px;
    margin-top: 6px;
    padding: 8px 12px;
    background-color: #FEF2F2;
    border-radius: 6px;
    border-left: 3px solid #EF4444;
}

.form-submit {
    width: 100%;
    background-color: #0369A1;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 20px;
    font-family: inherit;
}

.form-submit:hover {
    background-color: #0284c7;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.form-links {
    margin-top: 24px;
    text-align: center;
    font-size: 14px;
    padding-top: 15px;
    border-top: 1px solid #F1F5F9;
}

.form-links a {
    color: #0369A1;
    text-decoration: none;
    transition: all 0.2s ease;
    position: relative;
    display: inline-block;
}

.form-links a:hover {
    color: #0284c7;
}

.form-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #0369A1;
    transition: width 0.2s ease;
}

.form-links a:hover::after {
    width: 100%;
}

.form-links span {
    color: #64748b;
    margin: 0 8px;
}

.form-section {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #E2E8F0;
}

.form-section-title {
    font-size: 18px;
    font-weight: bold;
    color: #0F172A;
    margin-bottom: 20px;
}

.logout-btn {
    width: 100%;
    background-color: #EF4444;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 20px;
    font-family: inherit;
}

.logout-btn:hover {
    background-color: #DC2626;
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.message {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.message.success {
    background-color: #D1FAE5;
    color: #059669;
}

.message.error {
    background-color: #FEE2E2;
    color: #DC2626;
}

/* 页脚 */
.footer {
    background-color: var(--footer-background);
    color: var(--footer-text);
    padding: 40px 0;
    margin-top: 60px;
    border-top: 1px solid var(--footer-secondary);
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-section h3 {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 20px;
    color: var(--footer-text);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--footer-secondary);
    display: inline-block;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: var(--footer-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 14px;
    display: inline-block;
    position: relative;
}

.footer-section ul li a:hover {
    color: var(--footer-text);
    transform: translateX(5px);
}

.footer-section ul li a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--accent-color);
    transition: width 0.2s ease;
}

.footer-section ul li a:hover::after {
    width: 100%;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid var(--footer-secondary);
    color: var(--footer-secondary);
    font-size: 14px;
}

/* 工具栏 */
.toolbar {
    position: fixed;
    right: 30px;
    bottom: 30px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 999;
}

.toolbar-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--card-background);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 20px;
    color: var(--secondary-color);
}

.toolbar-btn:hover {
    background-color: var(--accent-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .cards-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

@media (max-width: 992px) {
    .cards-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .advertisement-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
    }
    
    .navbar-menu {
        display: none;
    }
    
    .advertisement-grid {
        gap: 15px;
    }
    
    .footer-container {
        gap: 20px;
    }
    
    .login-container,
    .register-container,
    .personal-container {
        padding: 30px;
        margin: 40px auto;
    }
}

@media (max-width: 576px) {
    .cards-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0;
    }

    /* 手机端容器：减小左右内边距，让卡片更宽 */
    .container {
        padding: 0 4px !important;
    }

    /* 手机端卡片：细边框，避免3列超出屏幕 */
    .card {
        border: 1px solid #D1D5DB !important;
        border-radius: 4px;
        box-sizing: border-box;
        min-width: 0;
    }

    .card-recommended {
        border: 1px solid #FF9800 !important;
    }

    .card-normal {
        border: 1px solid #E91E63 !important;
    }

    .card-top {
        border: 1px solid #FFEA00 !important;
    }

    /* 手机端卡片内容紧凑化，每个div限定一行 */
    .card-content {
        padding: 4px 4px;
    }

    /* 昵称：限定一行，超出滚动显示 */
    .card-nickname {
        font-size: 11px;
        margin-bottom: 1px;
        line-height: 1.1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: clip;
        display: block;
        width: 100%;
    }

    /* 信息：限定一行，超出滚动显示 */
    .card-info {
        font-size: 12px !important;
        margin-bottom: 1px;
        line-height: 1.1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: clip;
        display: block;
        width: 100%;
    }

    /* 地区：限定一行，超出滚动显示 */
    .card-region {
        font-size: 12px !important;
        margin-bottom: 1px;
        line-height: 1.1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: clip;
        display: block;
        width: 100%;
    }

    /* 手机端卡片文字超出时鼠标悬停暂停滚动（由JS控制） */
    .card-nickname:hover,
    .card-info:hover,
    .card-region:hover {
        cursor: default;
    }

    .card-price {
        font-size: 11px;
        margin-top: 2px;
        padding-top: 1px;
        line-height: 1.1;
    }

    /* 手机端图片比例缩短 */
    .card-image-container {
        padding-top: 125%;
    }

    /* 手机端认证图标整体缩小30%：容器、图片、偏移全部按0.7比例重写
       明确指定所有属性，避免与桌面端宽/定位产生冲突 */
    .verification-badge.new-badge {
        top: 0;
        right: 0;
    }
    .verification-badge.green-badge {
        top: 0;
        right: -4px;
        width: 46px;   /* 65px * 0.7 */
        height: auto;
    }
    .verification-badge.verify-badge {
        top: 0;
        right: 1px;
        width: 56px;   /* 80px * 0.7 */
        height: auto;
    }
    .badge-image-new {
        width: 25px;   /* 36px * 0.7 */
        height: auto;
    }
    .badge-image-green {
        width: 43px;   /* 62px * 0.7 */
        height: auto;
    }
    .badge-image-verify {
        width: 58px;   /* 83px * 0.7 */
        height: auto;
    }

    .card-stats {
        padding: 2px 4px;
        font-size: 9px;
    }
    
    /* 手机端左上角国旗位置：往左上移，减少与边框的距离 */
    .card-country {
        top: 2px;
        left: 2px;
        padding: 1px 2px;
        font-size: 9px;
    }

    /* 手机端国旗图片缩小，适配小卡片 */
    .card-country img {
        width: 16px !important;
        height: 11px !important;
    }

    /* 手机端编号位置：往左上移，紧贴国旗下方 */
    .card-site-id {
        top: 20px;
        left: 2px;
        font-size: 9px;
        padding: 1px 4px;
    }

    .advertisement-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .toolbar {
        right: 20px;
        bottom: 20px;
    }
    
    .toolbar-btn {
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
    
    .login-container,
    .register-container,
    .personal-container {
        padding: 25px;
        margin: 30px auto;
    }
    
    .login-title,
    .register-title,
    .personal-title {
        font-size: 20px;
        margin-bottom: 20px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #F1F5F9;
}

::-webkit-scrollbar-thumb {
    background: #CBD5E1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94A3B8;
}

/* 隐藏元素 */
.hidden {
    display: none;
}

/* 显示元素 */
.show {
    display: block;
}

/* 文本居中 */
.text-center {
    text-align: center;
}

/* 文本左对齐 */
.text-left {
    text-align: left;
}

/* 文本右对齐 */
.text-right {
    text-align: right;
}

/* 边距顶部 */
.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.mt-30 {
    margin-top: 30px;
}

.mt-40 {
    margin-top: 40px;
}

/* 边距底部 */
.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-30 {
    margin-bottom: 30px;
}

.mb-40 {
    margin-bottom: 40px;
}