/* 1. 刷新指示器容器 */
    #ptr-loader {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 0; /* 初始高度为0 */
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 9999;
        pointer-events: none;
        overflow: hidden;
    }

    /* 2. 圆形图标背景 */
    .ptr-icon-box {
        width: 40px;
        height: 40px;
        background: rgba(255, 255, 255, 0.95);
        border-radius: 50%;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        transform: scale(0); /* 初始隐藏 */
        transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border: 1px solid rgba(0,0,0,0.05);
    }

    /* 3. 图标本身 */
    .ptr-icon {
        font-size: 20px;
        color: #333;
        transition: transform 0.3s;
    }

    /* 4. 加载动画 (旋转) */
    .ptr-loading .ptr-icon {
        animation: ptr-spin 0.8s linear infinite;
    }

    @keyframes ptr-spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
    
    body {
        overscroll-behavior-y: contain;
    }



:root {
    --primary-color: #000;
    --accent-color: #007aff;
    --bg-color: #f5f5f7;
    --card-bg: #ffffff;
    --text-main: #1d1d1f;
    --text-sub: #86868b;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.03);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
    --radius-lg: 16px;
    --radius-md: 12px;
}

body {
    background-color: var(--bg-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.square-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 15px;
}

.module-section {
    margin-bottom: 25px;
}

/* 通用标题样式 */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding: 0 2px;
}

.section-header h3 {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 按钮样式优化 */
.btn-premium {
    background: linear-gradient(135deg, #007aff, #0051a8);
    color: white !important;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 10px rgba(0,122,255,0.2);
}

.btn-premium:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 15px rgba(0,122,255,0.3);
}

.btn-text {
    color: var(--text-sub);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.2s;
    display: flex;
    align-items: center;
}

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

/* 第一排：认证用户 */
.user-scroll-wrapper {
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 5px;
    margin: 0 -5px;
    padding: 5px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.user-scroll-wrapper::-webkit-scrollbar { display: none; }

.user-card {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    width: 72px;
    margin-right: 12px;
    vertical-align: top;
    text-decoration: none !important;
    transition: transform 0.2s;
}

.user-card:hover {
    transform: translateY(-2px);
}

.avatar-wrapper {
    position: relative;
    width: 58px;
    height: 58px;
    margin-bottom: 6px;
}

.avatar-wrapper img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #fff;
    box-shadow: var(--shadow-sm);
}

.badge-wrapper {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 18px;
    height: 18px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.verified-icon {
    width: 100%;
    height: 100%;
    fill: #1DA1F2;
    filter: drop-shadow(0 1px 2px rgba(255,255,255,0.8));
    
}

.user-name {
    font-size: 11px;
    color: var(--text-main);
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    width: 100%;
    font-weight: 500;
}

/* 第二排：分类卡片 */
.category-track {
    display: flex;
    overflow-x: auto;
    gap: 12px;
    padding: 5px;
    padding-bottom: 10px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.category-track::-webkit-scrollbar { display: none; }

.cat-card {
    flex: 0 0 auto;
    width: 130px;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 12px;
    text-decoration: none !important;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 90px;
}

.cat-card:nth-child(4n+1) { background: linear-gradient(145deg, #ffffff, #f0f7ff); }
.cat-card:nth-child(4n+2) { background: linear-gradient(145deg, #ffffff, #fff0f0); }
.cat-card:nth-child(4n+3) { background: linear-gradient(145deg, #ffffff, #f0fff4); }
.cat-card:nth-child(4n+4) { background: linear-gradient(145deg, #ffffff, #fff9f0); }

.cat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.cat-icon {
    font-size: 20px;
    margin-bottom: 8px;
}

.cat-info h4 {
    font-size: 13px;
    margin: 0;
    color: var(--text-main);
    font-weight: 700;
}

.cat-info p {
    font-size: 10px;
    margin: 2px 0 0 0;
    color: var(--text-sub);
}

/* --- 第三排：独立卡片信息流 --- */

.feed-container {
    background: transparent;
    border: none;
    box-shadow: none;
    overflow: visible;
    max-width: 100%;
    margin: 0 auto;
}

.feed-item {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: #fff;
    border-radius: 16px;
    margin-bottom: 15px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0,0,0,0.01);
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none !important;
    cursor: pointer;
}

.feed-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 左侧头像 */
.feed-avatar-col {
    flex-shrink: 0;
    width: 48px;
    position: relative;
}

.feed-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    background: #f0f0f0;
    border: 1px solid rgba(0,0,0,0.05);
}

.feed-verified-badge {
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 16px;
    height: 16px;
    background: transparent;
    z-index: 2;
    filter: drop-shadow(0 1px 2px rgba(255,255,255,0.8));
}
.feed-verified-badge svg {
    width: 100%;
    height: 100%;
    fill: #1DA1F2;
}

/* 右侧内容 */
.feed-content-col {
    flex: 1;
    min-width: 0;
}

.feed-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
    font-size: 14px;
    line-height: 1.3;
}

.feed-author-name {
    font-weight: 700;
    color: #000;
}

.feed-meta {
    color: #888;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.feed-text-wrap {
    margin-bottom: 12px;
}

.feed-title {
    font-size: 16px;
    font-weight: 700;
    color: #1d1d1f;
    margin-bottom: 6px;
    line-height: 1.4;
    display: block;
}

.feed-excerpt {
    font-size: 14px;
    color: #444;
    line-height: 1.6;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* --- 多图宫格样式 (核心修改) --- */
.feed-gallery {
    display: grid;
    gap: 2px; /* 图片之间的间隙极小，仿X风格 */
    border-radius: 12px;
    overflow: hidden;
    margin-top: 12px;
    width: 100%;
    border: 1px solid rgba(0,0,0,0.05);
    aspect-ratio: 16/9; /* 保持容器整体比例 */
}

.feed-gallery img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 自动裁剪填充 */
    display: block;
    transition: transform 0.3s ease;
}

.feed-item:hover .feed-gallery img {
    transform: scale(1.02); /* 悬停微动 */
}

/* 1张图：全宽 */
.feed-gallery.g-1 {
    grid-template-columns: 1fr;
}

/* 2张图：对半 */
.feed-gallery.g-2 {
    grid-template-columns: 1fr 1fr;
}

/* 3张图：三列 */
.feed-gallery.g-3 {
    grid-template-columns: 1fr 1fr 1fr;
}

/* 4张图：田字格 */
.feed-gallery.g-4 {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
}


/* 底部互动 */
.feed-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    max-width: 90%;
    color: #888;
}

.feed-action {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    transition: color 0.2s;
    padding: 5px;
    border-radius: 5px;
}

.feed-action:hover {
    color: #1d9bf0;
    background: rgba(29, 155, 240, 0.05);
}

.feed-action i {
    font-size: 16px;
}

/* 移动端微调 */
@media (max-width: 768px) {
    .square-container { padding: 15px 10px; }
    .feed-item { padding: 15px; gap: 12px; border-radius: 12px; }
    .feed-avatar, .feed-avatar-col { width: 40px; height: 40px; }
    .feed-title { font-size: 15px; }
    .feed-excerpt { font-size: 13px; -webkit-line-clamp: 2; }
    /* 手机端3图可以改回2行布局更清晰，或者保持3列 */
}