/* ============================================ */
/* 浅蓝色主题 - 全平台统一配色方案 */
/* ============================================ */

/* 主题色定义 */
:root {
    --primary-color: #4A90E2;          /* 主色：浅蓝色 */
    --primary-light: #5BA0F2;          /* 辅助色：更浅的蓝色 */
    --primary-dark: #2E7BD6;           /* 强调色：深一点的蓝色 */
    --primary-bg: #E8F4FD;             /* 背景色：非常浅的蓝色 */
    --primary-gradient: linear-gradient(135deg, #4A90E2 0%, #5BA0F2 100%);
    
    --success-color: #4CAF50;          /* 成功状态：绿色 */
    --warning-color: #FF9800;          /* 警告状态：橙色 */
    --danger-color: #F44336;           /* 错误状态：红色 */
    --info-color: #9C27B0;             /* 信息状态：紫色 */
    
    --text-primary: #333333;           /* 主要文字：深灰色 */
    --text-secondary: #666666;         /* 辅助文字：灰色 */
    --text-muted: #999999;             /* 淡文字：浅灰色 */
    
    --bg-white: #FFFFFF;               /* 白色背景 */
    --bg-light: #F8F9FA;               /* 浅灰背景 */
    --bg-blue-light: #E8F4FD;          /* 浅蓝背景 */
    
    --border-color: #E0E0E0;           /* 边框颜色 */
    --shadow-light: rgba(74, 144, 226, 0.1);  /* 浅阴影 */
    --shadow-medium: rgba(74, 144, 226, 0.2); /* 中阴影 */
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-blue-light);
    color: var(--text-primary);
    padding-top: 56px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* ============================================ */
/* 导航栏 - 浅蓝色主题 */
/* ============================================ */
.navbar {
    background: var(--primary-gradient);
    color: white;
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: 0 2px 12px var(--shadow-medium);
}

.navbar .container {
    display: flex;
    align-items: center;
    height: 56px;
}

.navbar-brand {
    font-size: 1.3rem;
    font-weight: bold;
    margin-right: 2rem;
    white-space: nowrap;
}

.navbar-brand a {
    color: white;
    text-decoration: none;
}

.navbar-links {
    display: flex;
    gap: 4px;
    align-items: center;
}

.navbar-links a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.2s;
    white-space: nowrap;
}

.navbar-links a:hover {
    color: white;
    background: rgba(255, 255, 255, 0.15);
}

.navbar-links a.active {
    color: white;
    background: rgba(255, 255, 255, 0.25);
    font-weight: 500;
}

/* ============================================ */
/* 卡片样式 - 浅蓝色主题 */
/* ============================================ */
.card {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: 0 2px 12px var(--shadow-light);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 4px 16px var(--shadow-medium);
}

.card-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1rem;
}

/* 搜索卡片 */
.search-card {
    padding: 1rem;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--primary-light);
    border-radius: 25px;
    font-size: 1rem;
    background: var(--bg-blue-light);
    transition: all 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-white);
    box-shadow: 0 0 0 3px var(--shadow-light);
}

/* 平台介绍卡片 */
.platform-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--primary-gradient);
    color: white;
}

.platform-info {
    flex: 1;
}

.platform-info h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.platform-info p {
    opacity: 0.9;
    margin-bottom: 1rem;
}

.platform-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.reunion-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.reunion-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* 校园动态卡片 */
.dynamic-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
}

.dynamic-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-blue-light);
    border-radius: 8px;
    transition: transform 0.3s;
}

.dynamic-item:hover {
    transform: translateY(-2px);
}

.dynamic-item .count {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.dynamic-item .label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* 热门拼车卡片 */
.hot-ride-card {
    position: relative;
}

.station-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.station-tag {
    background: var(--bg-blue-light);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.station-tag:hover {
    background: var(--primary-color);
    color: white;
}

/* 椭圆形按钮 */
.btn-oval {
    background: var(--primary-gradient);
    color: white;
    padding: 0.4rem 1rem;
    border: none;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-oval:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.btn-oval-hot {
    background: linear-gradient(135deg, #FF9800 0%, #F44336 100%);
    color: white;
    padding: 0.3rem 0.8rem;
    border: none;
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-oval-hot:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

/* 轮播图广告样式 */
.banner-carousel-card {
    padding: 6px;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow-medium);
}

.carousel-container {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
    border-radius: 10px;
}

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

.carousel-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
}

.carousel-slide a {
    display: block;
    width: 100%;
    height: 100%;
}

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

.carousel-dots {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    background: rgba(0,0,0,0.3);
    padding: 4px 12px;
    border-radius: 20px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s;
}

.carousel-dot.active {
    background: white;
    transform: scale(1.3);
}

/* 功能卡片网格 */
.function-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.function-card {
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.function-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-medium);
    border-color: var(--primary-light);
}

.function-card .icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.function-card.market .icon {
    background: linear-gradient(135deg, #4CAF50 0%, #8BC34A 100%);
    color: white;
}

.function-card.buy .icon {
    background: linear-gradient(135deg, #FF9800 0%, #FF5722 100%);
    color: white;
}

.function-card.group .icon {
    background: linear-gradient(135deg, #9C27B0 0%, #E040FB 100%);
    color: white;
}

.function-card h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.function-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* 互动区卡片 */
.interaction-list {
    max-height: 300px;
    overflow-y: auto;
}

.interaction-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s;
}

.interaction-item:hover {
    background: var(--bg-blue-light);
}

.interaction-item:last-child {
    border-bottom: none;
}

.interaction-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.interaction-content {
    flex: 1;
    min-width: 0;
}

.interaction-content h4 {
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.interaction-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.interaction-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

/* 今日热门 */
.hot-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.hot-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--bg-blue-light);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.hot-item:hover {
    background: var(--primary-bg);
    transform: translateX(5px);
}

.hot-rank {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: bold;
}

.hot-rank.top3 {
    background: linear-gradient(135deg, #FFD700 0%, #FF8C00 100%);
}

.hot-content {
    flex: 1;
}

.hot-content h4 {
    font-size: 0.9rem;
    margin-bottom: 0.2rem;
    color: var(--text-primary);
}

.hot-content .views {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 发布按钮 */
.floating-btn {
    position: fixed;
    bottom: 2rem;
    left: 1rem;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    font-size: 1.2rem;
    box-shadow: 0 4px 15px var(--shadow-medium);
    cursor: pointer;
    transition: all 0.3s;
    z-index: 1000;
}

.floating-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--shadow-medium);
}

/* 发布弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
    z-index: 2000;
    display: none;
}

.modal-overlay.show {
    display: flex;
}

.modal-content {
    background: var(--bg-white);
    border-radius: 16px;
    width: 90%;
    max-width: 400px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 8px 32px var(--shadow-medium);
}

.modal-header {
    padding: 1.5rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-blue-light);
}

.modal-header h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.modal-body {
    padding: 1.5rem;
}

.publish-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.publish-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.publish-item:hover {
    background: var(--bg-blue-light);
    border-color: var(--primary-light);
}

.publish-item .icon {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.publish-item.ride .icon { background: var(--primary-gradient); color: white; }
.publish-item.help .icon { background: linear-gradient(135deg, #4CAF50 0%, #8BC34A 100%); color: white; }
.publish-item.market .icon { background: linear-gradient(135deg, #FF9800 0%, #FF5722 100%); color: white; }
.publish-item.buy .icon { background: linear-gradient(135deg, #F44336 0%, #FF5252 100%); color: white; }
.publish-item.group .icon { background: linear-gradient(135deg, #9C27B0 0%, #E040FB 100%); color: white; }

.publish-item span {
    font-size: 0.85rem;
    color: var(--text-primary);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: none;
    background: var(--bg-light);
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.modal-close:hover {
    background: var(--primary-color);
    color: white;
}

/* 列表页面 */
.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.list-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.back-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-blue-light);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--primary-color);
    transition: all 0.3s;
}

.back-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* 列表项 */
.item-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.item-card {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow-light);
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    border: 2px solid transparent;
}

.item-card:hover {
    box-shadow: 0 4px 12px var(--shadow-medium);
    border-color: var(--primary-light);
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.item-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.item-price {
    color: var(--danger-color);
    font-weight: 600;
}

.item-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.item-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* FAB按钮 */
.fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px var(--shadow-medium);
    cursor: pointer;
    z-index: 100;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px var(--shadow-medium);
}

/* ============================================ */
/* 椭圆形标签 - 统一样式 */
/* ============================================ */
.oval {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    transition: all 0.3s;
}

.oval:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.oval-light {
    background: var(--bg-blue-light);
    color: var(--primary-color);
}

.oval-green {
    background: linear-gradient(135deg, #4CAF50 0%, #8BC34A 100%);
    color: white;
}

.oval-orange {
    background: linear-gradient(135deg, #FF9800 0%, #FF5722 100%);
    color: white;
}

.oval-red {
    background: linear-gradient(135deg, #F44336 0%, #FF5252 100%);
    color: white;
}

.oval-gray {
    background: var(--bg-light);
    color: var(--text-muted);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.quick-nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.quick-nav .oval {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
}

/* ============================================ */
/* 手机端响应式 (<= 768px) - App风格UI */
/* ============================================ */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    body {
        min-width: 320px;
        -webkit-text-size-adjust: 100%;
        background-color: var(--bg-blue-light);
    }
    
    .container {
        padding: 0 12px;
        max-width: 100%;
    }
    
    /* 手机端导航栏 - 两行布局 */
    .navbar .container {
        height: auto;
        flex-wrap: wrap;
        padding-top: 0.5rem;
        padding-bottom: 0.5rem;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
        margin-right: 0;
    }
    
    .navbar-links {
        width: 100%;
        display: flex;
        gap: 2px;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        -ms-overflow-style: none;
        margin-top: 6px;
        padding-bottom: 2px;
    }
    
    .navbar-links::-webkit-scrollbar {
        display: none;
    }
    
    .navbar-links a {
        padding: 4px 10px;
        font-size: 0.78rem;
        border-radius: 14px;
        flex-shrink: 0;
    }
    
    /* 平台介绍卡片 - 竖排居中 */
    .platform-card {
        flex-direction: row;
        text-align: left;
        gap: 0.75rem;
        padding: 0.75rem;
    }
    
    .platform-info {
        flex: 1;
    }
    
    .platform-info h2 {
        font-size: 1.1rem;
        margin-bottom: 0.25rem;
    }
    
    .platform-info p {
        font-size: 0.75rem;
        margin-bottom: 0.5rem;
    }
    
    .platform-avatar {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        order: 0;
        flex-shrink: 0;
    }
    
    .reunion-tags {
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    
    .reunion-tag {
        font-size: 0.65rem;
        padding: 0.15rem 0.4rem;
    }
    
    /* 搜索卡片 */
    .search-card {
        padding: 0.75rem;
    }
    
    .search-input {
        padding: 0.6rem 0.8rem;
        font-size: 0.9rem;
    }
    
    .btn-oval {
        padding: 0.35rem 0.8rem;
        font-size: 0.8rem;
    }
    
    /* 校园动态 */
    .dynamic-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 0.5rem;
    }
    
    .dynamic-item {
        padding: 0.75rem 0.5rem;
    }
    
    .dynamic-item .count {
        font-size: 1.2rem;
    }
    
    .dynamic-item .label {
        font-size: 0.7rem;
    }
    
    /* 功能卡片 */
    .function-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
    }
    
    .function-card {
        padding: 1rem;
    }
    
    .function-card .icon {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
    }
    
    .function-card h4 {
        font-size: 0.9rem;
    }
    
    .function-card p {
        font-size: 0.75rem;
    }
    
    /* 互动区 */
    .interaction-item {
        padding: 0.75rem;
        gap: 0.75rem;
    }
    
    .interaction-avatar {
        width: 35px;
        height: 35px;
        font-size: 0.8rem;
    }
    
    .interaction-content h4 {
        font-size: 0.85rem;
    }
    
    .interaction-content p {
        font-size: 0.75rem;
    }
    
    /* 今日热门 */
    .hot-item {
        padding: 0.6rem;
        gap: 0.75rem;
    }
    
    .hot-rank {
        width: 20px;
        height: 20px;
        font-size: 0.65rem;
    }
    
    .hot-content h4 {
        font-size: 0.85rem;
    }
    
    .hot-content .views {
        font-size: 0.7rem;
    }
    
    /* 发布按钮 */
    .floating-btn {
        width: 55px;
        height: 55px;
        font-size: 1.1rem;
        bottom: 1.5rem;
        right: 0.75rem;
        left: auto;
    }
    
    .fab {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
        bottom: 1.5rem;
        right: 1.5rem;
    }
    
    /* 发布弹窗 */
    .modal-content {
        width: 95%;
        max-width: 360px;
    }
    
    .modal-header {
        padding: 1.25rem;
    }
    
    .modal-header h3 {
        font-size: 1.1rem;
    }
    
    .modal-body {
        padding: 1.25rem;
    }
    
    .publish-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
    }
    
    .publish-item {
        padding: 0.75rem 0.5rem;
    }
    
    .publish-item .icon {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }
    
    .publish-item span {
        font-size: 0.8rem;
    }
    
    /* 卡片通用 */
    .card {
        margin-bottom: 0.75rem;
        border-radius: 10px;
    }
    
    .card-header {
        padding: 0.75rem;
    }
    
    .card-header h3 {
        font-size: 0.95rem;
    }
    
    .card-body {
        padding: 0.75rem;
    }
    
    /* 列表项 */
    .item-card {
        border-radius: 10px;
        padding: 0.75rem;
    }
    
    .item-title {
        font-size: 0.9rem;
    }
    
    .item-meta {
        font-size: 0.75rem;
        gap: 0.5rem;
    }
    
    .item-desc {
        font-size: 0.85rem;
    }
    
    /* 椭圆形标签 */
    .oval {
        font-size: 0.85rem;
        padding: 0.4rem 0.9rem;
    }
    
    .section-title {
        font-size: 1rem;
    }
}

/* ============================================ */
/* 超小屏幕 (<= 425px) - 进一步优化 */
/* ============================================ */
@media (max-width: 425px) {
    .navbar .container {
        flex-direction: column;
        gap: 0;
        padding-top: 0.4rem;
        padding-bottom: 0.4rem;
    }
    
    .navbar-brand {
        font-size: 1rem;
        margin-right: 0;
    }
    
    .navbar-links {
        width: 100%;
        justify-content: flex-start;
        margin-top: 4px;
        gap: 2px;
    }
    
    .navbar-links a {
        padding: 3px 8px;
        font-size: 0.72rem;
    }
    
    /* 平台介绍卡片 */
    .platform-card {
        padding: 1rem;
    }
    
    .platform-info h2 {
        font-size: 1.15rem;
    }
    
    .platform-info p {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }
    
    .platform-avatar {
        width: 55px;
        height: 55px;
        font-size: 1.3rem;
    }
    
    /* 搜索卡片 - 竖排 */
    .search-card > div {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .search-input {
        width: 100%;
    }
    
    .btn-oval {
        width: 100%;
        padding: 0.5rem;
    }
    
    /* 动态网格 */
    .dynamic-grid {
        gap: 0.3rem;
    }
    
    .dynamic-item {
        padding: 0.5rem 0.3rem;
    }
    
    .dynamic-item .count {
        font-size: 1.1rem;
    }
    
    .dynamic-item .label {
        font-size: 0.65rem;
    }
    
    /* 功能卡片 */
    .function-card {
        padding: 0.75rem 0.5rem;
    }
    
    .function-card .icon {
        width: 35px;
        height: 35px;
        font-size: 1.1rem;
    }
    
    .function-card p {
        display: none;
    }
    
    /* 互动区 */
    .interaction-content p {
        display: none;
    }
    
    /* 发布按钮 */
    .floating-btn {
        width: 50px;
        height: 50px;
        font-size: 1rem;
        bottom: 1rem;
        right: 0.5rem;
        left: auto;
    }
    
    .fab {
        width: 48px;
        height: 48px;
        font-size: 1.2rem;
    }
    
    /* 站点标签滚动 */
    .station-tags {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
    }
}

/* ============================================ */
/* 电脑端优化 (>= 1200px) */
/* ============================================ */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    /* 平台介绍卡片 - 更大的间距 */
    .platform-card {
        padding: 2rem;
        gap: 2rem;
    }
    
    .platform-info h2 {
        font-size: 1.8rem;
    }
    
    .platform-avatar {
        width: 120px;
        height: 120px;
        font-size: 2.5rem;
    }
    
    /* 功能卡片网格 - 4列布局 */
    .function-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
    }
    
    /* 卡片更大的圆角和阴影 */
    .card {
        border-radius: 16px;
        box-shadow: 0 4px 20px var(--shadow-light);
    }
    
    .card:hover {
        box-shadow: 0 8px 30px var(--shadow-medium);
    }
    
    /* 椭圆形按钮更大 */
    .oval {
        padding: 0.6rem 1.2rem;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
}

/* ============================================ */
/* 动画效果 */
/* ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.5s ease;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Firefox滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-light) var(--bg-blue-light);
}