/* 首页样式：从 home.html 内联 <style> 拆出（标题子集字体 @font-face 与 :root 字体变量仍留在 HTML，
 * 保证字体相对路径不变）。外链带 ?v= 版本号后可被浏览器长期缓存。
 * 拆分时已删除匹配不到任何元素的废弃规则（首页 HTML / JS / 懒加载片段 / 服务端输出中都不存在的 class）。 */

.login-slogan-copy h2,
.login-form-pane h3,
.auth-welcome-visual h3,
.auth-welcome-headline,
.feed-slogan-title,
#beginner-village .rank-card-header h3,
#hot-rank-section .hot-rank-header h3 {
    font-family: var(--font-display) !important;
}

/* Global gradient background */
body {
    background: linear-gradient(180deg, rgba(255, 183, 124, 0.15) 0%, rgba(242, 223, 208, 0.15) 50%, rgba(219, 219, 236, 0.1) 100%);
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

.app-container {
    min-height: 100vh;
}

.home-help-modal {
    width: min(1120px, calc(100vw - 40px));
    height: min(760px, calc(100vh - 40px));
    max-width: none;
    max-height: none;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-container);
    background: var(--surface1);
    box-shadow: var(--shadow-1);
}
.home-help-modal::backdrop { background: rgba(12, 17, 29, 0.34); }
#home-help-shadow-source { display: block; height: 100%; }
.home-help-modal-close { position: sticky; top: 0; float: right; width: 36px; height: 36px; border: 1px solid var(--border-visible); border-radius: var(--radius-control); background: var(--surface1); color: var(--text2); cursor: pointer; }
.home-help-panel[hidden] { display: none; }
@media (max-width: 768px) { .home-help-modal { width: calc(100vw - 24px); height: calc(100dvh - 24px); } }

.learning-modal {
    padding: 16px;
}

.learning-modal-content {
    overflow: auto;
    height: 100%;
}

.learning-modal .learning-layout {
    display: grid;
    grid-template-columns: clamp(280px, 31vw, 380px) minmax(0, 1fr);
    gap: 14px;
    align-items: stretch;
    height: 100%;
}

.learning-modal .learning-preview-column {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px;
    background: var(--surface1);
    border: 1px solid var(--line-primary);
    border-radius: 18px;
    box-shadow: var(--shadow-1);
    overflow: hidden;
    height: 100%;
}

.learning-modal .learning-preview-header {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.learning-modal .learning-preview-kicker {
    font-size: 11px;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--accent);
}

.learning-modal .learning-preview-header h4 {
    margin: 0;
    font-size: 16px;
    line-height: 1.2;
    font-weight: 800;
    color: var(--text1);
}

.learning-modal .learning-preview-header p {
    margin: 0;
    font-size: 12px;
    line-height: 1.35;
    color: var(--text2);
}

.learning-modal .learning-preview-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.learning-modal .learning-preview-tags .tag {
    display: inline-flex;
    align-items: center;
    min-height: 22px;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    color: #6E93EB;
    font: 400 var(--text-caption) / 1.2 var(--font-body);
    box-shadow: none;
}
.learning-modal .learning-preview-tags .tag:hover { color: #4960C5; }

.learning-modal .learning-preview-tags .tag::before { content: '#'; }
.learning-modal .learning-preview-tags .tag-priority {
    color: #6E93EB;
    font-weight: 400;
}
.learning-modal .learning-preview-tags .tag-priority:hover { color: #4960C5; }

.learning-modal .learning-preview-desc {
    margin: 0;
    color: var(--text2);
    font-size: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.learning-modal .learning-preview-stage {
    flex: 0 1 auto;
    min-height: 220px;
    border-radius: 16px;
    overflow: auto;
    border: 1px solid var(--line-primary);
    background: var(--surface2);
    display: block;
    width: 100%;
    max-width: 100%;
    max-height: min(62vh, 720px);
    align-self: flex-start;
}

.learning-modal .learning-preview-stage--portrait {
    width: 100%;
}

.learning-modal .learning-preview-stage--fit {
    aspect-ratio: auto;
    width: 100%;
}

.learning-modal .learning-preview-stage--iframe {
    aspect-ratio: auto;
    width: 100%;
    min-height: 360px;
}

.learning-modal .learning-preview-stage-inner {
    display: block;
    width: 100%;
}

.learning-modal .learning-preview-stage-inner > *,
.learning-modal .learning-preview-stage-inner iframe,
.learning-modal .learning-preview-stage-inner img,
.learning-modal .learning-preview-stage-inner video,
.learning-modal .learning-preview-stage-inner audio {
    width: 100% !important;
    height: auto !important;
    max-width: 100% !important;
    max-height: none !important;
    object-fit: contain;
}

.learning-modal .learning-preview-stage--iframe .learning-preview-stage-inner,
.learning-modal .learning-preview-stage--iframe .preview-thumbnail,
.learning-modal .learning-preview-stage--iframe iframe {
    width: 100% !important;
    height: 100% !important;
    min-height: 360px;
    transform: none !important;
}

.learning-modal .learning-preview-clone {
    width: 100% !important;
    height: auto !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    margin: 0 !important;
}

.learning-modal .learning-preview-clone .preview-overlay,
.learning-modal .learning-preview-clone .preview-open-hitarea,
.learning-modal .learning-preview-clone .preview-loading-layer {
    display: none !important;
}

.learning-modal .learning-preview-clone .preview-thumbnail {
    height: auto !important;
    min-height: 0;
    border-radius: 0;
    box-shadow: none;
    margin: 0;
}

.learning-modal .learning-preview-clone .preview-thumbnail img,
.learning-modal .learning-preview-clone .preview-thumbnail video {
    display: block;
    width: 100% !important;
    height: auto !important;
    max-height: none !important;
    object-fit: contain !important;
}

.learning-modal .learning-preview-clone .markdown-preview-content {
    height: 100%;
    overflow: auto;
    padding: 16px;
}

.learning-modal .learning-preview-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    color: var(--text3);
    min-height: 320px;
}

.learning-modal .learning-preview-empty i {
    font-size: 34px;
}

.learning-modal .learning-detail-column {
    min-width: 0;
}

.learning-modal .learning-detail-column .learning-sheet {
    gap: 10px;
}

.learning-modal .learning-detail-column .learning-meta {
    display: none;
}

.learning-modal .learning-grid {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.learning-modal .learning-detail-column .learning-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
}

.learning-modal .learning-detail-column .learning-block {
    padding: 12px 14px;
}

.learning-modal .learning-detail-column .learning-block-heading {
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.learning-modal .learning-detail-column .learning-block-heading > div {
    flex: 1;
    min-width: 0;
}

.learning-copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    height: 30px;
    padding: 0 10px;
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-control);
    background: var(--surface1);
    color: var(--text2);
    font: 500 var(--text-caption)/1 var(--font-body);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-fast);
    flex: 0 0 auto;
}

.learning-copy-btn:hover {
    background: var(--surface2);
    color: var(--text1);
}

.learning-copy-btn.copied {
    background: var(--accent-subtle);
    color: var(--accent-hover);
    border-color: transparent;
}

.learning-copy-btn.disabled,
.learning-copy-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.learning-modal .learning-detail-column .learning-list {
    gap: 4px;
}

.learning-modal .learning-detail-column .learning-list-item {
    padding: 4px 10px;
    line-height: 1.35;
}

.learning-modal .learning-detail-column .learning-prompt-quote {
    font-size: 13px;
    padding: 10px 12px;
}

.learning-modal .learning-detail-column .learning-prompt-toggle {
    margin-top: 8px;
}

@media (max-width: 980px) {
    .learning-modal {
        padding: 12px;
    }

    .learning-modal .learning-layout {
        grid-template-columns: 1fr;
        height: auto;
    }

    .learning-modal .learning-preview-column {
        overflow-x: hidden;
    }

    .learning-modal .learning-preview-stage {
        flex: 0 0 auto;
        align-self: auto;
        aspect-ratio: 5 / 4;
        min-height: 0;
        max-height: none;
        width: 100%;
        justify-self: start;
    }

    .learning-modal .learning-preview-stage--portrait {
        flex: 0 0 auto;
        align-self: auto;
        width: 100%;
        justify-self: start;
    }

    .learning-modal .learning-preview-stage--fit {
        flex: 0 0 auto;
        align-self: auto;
        width: 100%;
        justify-self: start;
    }

    .learning-modal .learning-preview-stage--iframe {
        flex: 0 0 auto;
        align-self: auto;
        aspect-ratio: 5 / 4;
        min-height: 0;
        width: 100%;
        justify-self: start;
    }

    .learning-modal .learning-preview-stage-inner {
        height: 100%;
    }

    .learning-modal .learning-preview-stage-inner > *,
    .learning-modal .learning-preview-stage-inner iframe,
    .learning-modal .learning-preview-stage-inner img,
    .learning-modal .learning-preview-stage-inner video,
    .learning-modal .learning-preview-stage-inner audio {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        max-height: 100% !important;
        object-fit: contain;
    }

    .learning-modal .learning-preview-stage--iframe .learning-preview-stage-inner,
    .learning-modal .learning-preview-stage--iframe .preview-thumbnail,
    .learning-modal .learning-preview-stage--iframe iframe {
        width: 100% !important;
        height: 100% !important;
        min-height: 0;
        transform: none !important;
    }
}

/* Tag styles */
.tag {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(132, 136, 239, 0.1);
    color: #8488EF;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    margin: 0 2px;
    border: 1px solid rgba(132, 136, 239, 0.2);
}

main {
    margin-left: 0;
    padding: 20px;
    padding-top: 140px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(24px);
    z-index: 1000;
    padding: 10px 40px 8px;
    box-sizing: border-box;
    border-bottom: 1px solid rgba(226, 232, 240, 0.9);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header-main {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.header-top {
    display: flex;
    align-items: center;
    gap: 24px;
    width: 100%;
    min-width: 0;
    flex-wrap: wrap;
}

.header-search {
    flex: 1;
    display: flex;
    justify-content: center;
    min-width: 0;
}

.header-search-shell {
    flex: 1 1 360px;
    min-width: 0;
}

/* 大屏限宽并居中：组件库 .community-theme .header-search-shell 写了
   width:100% + max-width:100%（特异性 0,2,0），必须用同级选择器覆盖 */
.community-theme .header-search-shell {
    max-width: 760px;
    justify-self: center;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    justify-content: flex-end;
    flex: 0 1 auto;
    min-width: 0;
    flex-wrap: wrap;
    margin-left: auto;
}

.header-login-btn {
    border: 1px solid var(--border-visible);
    background: var(--surface1);
    color: var(--text1);
}

.header-login-btn i {
    color: var(--accent);
}

.header-auth-menu {
    position: relative;
    display: flex;
    align-items: center;
}

.feed-bottom-loading {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 12px 0 28px;
    color: var(--text2);
    font-size: var(--text-body-sm);
    font-weight: 600;
}

.feed-bottom-loading.is-visible {
    display: inline-flex;
}

.feed-bottom-loading i {
    color: var(--accent);
}

.feed-pagination-sentinel {
    width: 100%;
    height: 1px;
    pointer-events: none;
}

[data-auth-guest][hidden],
[data-auth-user][hidden] {
    display: none !important;
}

.header-avatar-btn {
    width: 46px;
    height: 46px;
    padding: 3px;
    border: 1px solid var(--brand-soft-border);
    border-radius: 999px;
    background: #ffffff;
    box-shadow: 0 10px 26px rgba(23, 29, 43, 0.08);
    cursor: pointer;
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.header-avatar-btn:hover,
.header-auth-menu.is-open .header-avatar-btn {
    transform: translateY(-1px);
    border-color: rgba(243, 112, 88, 0.5);
    box-shadow: 0 16px 36px rgba(243, 112, 88, 0.18);
}

.header-avatar-btn img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 999px;
    object-fit: cover;
}

.header-user-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    z-index: 1000;
    width: 236px;
    padding: var(--space-sm);
    border: 1px solid var(--border-visible);
    border-radius: var(--radius-container);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 24px 60px rgba(23, 29, 43, 0.14);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top right;
    transition: opacity 160ms ease, transform 160ms ease;
}

.header-auth-menu.is-open .header-user-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}

.header-user-card {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: 14px;
    background: var(--surface2);
}

.header-user-card > div {
    min-width: 0;
}

.header-user-card img {
    width: 42px;
    height: 42px;
    border-radius: 999px;
    object-fit: cover;
    background: #fff;
}

.header-user-card strong,
.header-user-card span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.header-user-card strong {
    color: var(--text1);
    font-size: var(--text-body);
    line-height: 1.35;
}

.header-user-card span {
    margin-top: 2px;
    color: var(--text2);
    font-size: var(--text-caption);
}

.header-user-card-link {
    width: 100%;
    border: 0;
    background: var(--surface2);
    text-align: left;
    font: inherit;
    color: inherit;
    cursor: pointer;
}

.header-user-card-link .header-user-card-arrow {
    margin-left: auto;
    color: var(--text3);
    font-size: 12px;
    transition: transform 0.15s ease;
}

.header-user-card-link:hover {
    background: #fff1ee;
}

.header-user-card-link:hover .header-user-card-arrow {
    transform: translateX(2px);
    color: var(--accent);
}

.header-user-menu-item {
    width: 100%;
    min-height: var(--control-height);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
    padding: 0 10px;
    border: 0;
    border-radius: var(--radius-control);
    background: transparent;
    color: var(--text1);
    font-family: var(--font-body);
    font-size: var(--text-body);
    font-weight: 700;
    text-align: left;
    cursor: pointer;
    transition: background 160ms ease, color 160ms ease;
}

.header-user-menu-item[data-referral-menu][hidden] {
    display: none !important;
}

.header-user-menu-item:hover {
    background: #fff1ee;
    color: var(--accent);
}

.header-user-menu-item .menu-item-arrow {
    margin-left: auto;
    font-size: 11px;
    color: var(--text3);
    transition: color 160ms ease;
}
.header-user-menu-item:hover .menu-item-arrow {
    color: var(--accent);
}

/* Second-level panel */
.header-user-menu-level2 {
    display: none;
    flex-direction: column;
}
.header-user-menu-level2.is-visible {
    display: flex;
}
.header-user-menu-level1.is-hidden {
    display: none;
}
.header-user-menu-back {
    width: 100%;
    min-height: var(--control-height);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0 10px;
    border: 0;
    border-bottom: 1px solid var(--border-visible);
    border-radius: 0;
    background: transparent;
    color: var(--text2);
    font-family: var(--font-body);
    font-size: var(--text-caption);
    font-weight: 400;
    cursor: pointer;
    margin-bottom: var(--space-sm);
}
.header-user-menu-back:hover { color: var(--accent); }

.mobile-download-fab {
    display: none;
}

.top-brand,
.top-brand-copy,
.search-bar,
.search-input,
.header-pill {
    min-width: 0;
}

.search-bar {
    width: 100%;
    max-width: 720px;
    height: 46px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 20px;
    border-radius: 999px;
    background: #f5f7fb;
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
}

.search-bar i {
    font-size: 16px;
    color: #9ca3af;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 14px;
    color: #111827;
}

.search-clear {
    order: 2;
    margin-inline-start: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
}
.search-clear:hover { background: transparent; }
.community-theme .search-bar .search-clear svg {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin: 0;
    background: transparent;
    color: var(--text3);
    font-size: 18px;
    line-height: 1;
}
.search-clear:focus-visible { outline: 2px solid var(--accent); }
.search-input:placeholder-shown + .search-clear { display: none; }

.search-input:focus {
    outline: none;
    box-shadow: none;
}

.search-input::placeholder {
    color: #9ca3af;
}

@media (max-width: 1180px) {
    header {
        padding: 10px 20px 8px;
    }

    .header-top {
        gap: 12px;
    }

    /* 修复: 搜索框保持在中间,不跑到最右边 */
    .header-search-shell {
        order: 2;
        flex: 1 1 320px;
        max-width: 600px;
        margin-left: 0;
    }

    .header-actions {
        order: 3;
        margin-left: auto;
        gap: 12px;
    }

    .top-brand-copy em {
        display: none;
    }

    /* 分类 tab 全断点统一为下划线文字样式（见 youvibe-components.css「首页改版」段落），
       中等断点不再切回胶囊外框 */
}

.header-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 18px;
    background: linear-gradient(96.41deg, #8488EF 1.89%, #FFB77C 97.64%);
    color: #ffffff;
    border: none;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 8px 24px rgba(132, 136, 239, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.header-share-btn:hover {
    box-shadow: 0 12px 36px rgba(132, 136, 239, 0.4);
    transform: translateY(-1px);
}

.user-avatar-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #e8eaed;
    transition: all 0.3s ease;
    cursor: pointer;
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(26, 115, 232, 0.3);
}

/* Gallery preview styles */
.gallery-container {
    column-count: 5;
    column-gap: 40px;
    padding: 30px 20px;
    max-width: 1400px;
    margin: 0 auto;
    background: transparent;
    min-height: calc(100vh - 300px); /* 最小高度，确保有足够空间垂直居中 */
    display: flex;
    flex-direction: column;
}

.gallery-container.search-empty-state {
    min-height: var(--search-empty-min-height, calc(100vh - 300px));
}

/* 当gallery有内容时，恢复瀑布流布局 */
.gallery-container:has(.file-preview-card) {
    display: block;
    min-height: auto;
}

/* 响应式瀑布流布局 */
@media (min-width: 1600px) {
    .gallery-container {
        column-count: 5;
        column-gap: 35px;
        max-width: 2200px;
        padding: 30px 40px;
    }
}

@media (min-width: 1200px) and (max-width: 1599px) {
    .gallery-container {
        column-count: 5;
        column-gap: 20px;
        max-width: 1400px;
        padding: 30px 30px;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .gallery-container {
        column-count: 5;
        column-gap: 35px;
        max-width: 1000px;
        padding: 30px 25px;
    }
}

@media (min-width: 769px) and (max-width: 991px) {
    .gallery-container {
        column-count: 5;
        column-gap: 30px;
        max-width: 800px;
        padding: 25px 20px;
    }
}

/* 大屏幕卡片间距优化 */
@media (min-width: 1200px) {
    .file-preview-card {
        margin-bottom: 25px;
    }
}

@media (min-width: 1600px) {
    .file-preview-card {
        margin-bottom: 20px;
    }
}

/* Files container background */
.files-container {
    background: transparent;
    padding: 0 20px;
}

/* 大屏幕容器优化 */
@media (min-width: 1200px) {
    .files-container {
        padding: 0 40px;
    }
}

@media (min-width: 1600px) {
    .files-container {
        padding: 0 60px;
    }
}

/* GPU硬件加速优化 - 为所有卡片相关元素启用硬件加速 */
.file-preview-card,
.file-preview-card::before,
.file-preview-card::after,
.preview-thumbnail,
.preview-thumbnail::before,
.preview-thumbnail::after,
.file-card-info {
    /* 强制启用GPU硬件加速 */
    transform: translate3d(0, 0, 0);
    -webkit-transform: translate3d(0, 0, 0);
    -moz-transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
}

.file-preview-card {
    backdrop-filter: blur(8px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(132, 136, 239, 0.15);
    overflow: hidden;
    /* 优化过渡效果，使用更流畅的timing function */
    transition: transform 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    position: relative;
    border: none;
    display: flex;
    flex-direction: column;
    /* GPU硬件加速优化 */
    will-change: transform;
    transform: translate3d(0, 0, 0);
    /* 启用硬件加速的复合层 */
    backface-visibility: hidden;
    -webkit-font-smoothing: antialiased;
    /* 瀑布流布局相关样式 */
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 30px;
    width: 100%;
}

.file-preview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        rgba(132, 136, 239, 0.05) 0%,
        rgba(255, 183, 124, 0.03) 50%,
        transparent 100%);
    opacity: 1;
    /* 优化过渡效果，缩短动画时间 */
    transition: opacity 0.15s ease-out;
    pointer-events: none;
    z-index: 1;
    /* 启用硬件加速 */
    will-change: opacity;
    transform: translate3d(0, 0, 0);
}

.file-preview-card:hover {
    /* 优化变换效果，减少scale的使用以提高性能 */
    transform: translate3d(0, -3px, 0);
    box-shadow: 0 12px 40px rgba(132, 136, 239, 0.2);
}

.file-preview-card:hover::before {
    /* 简化hover效果，只改变透明度避免重绘背景 */
    opacity: 0.7;
}

.preview-thumbnail {
    width: 100%;
    min-height: 200px;
    max-height: 1000px;
    background: linear-gradient(180deg,
        rgba(132, 136, 239, 0.05) 0%,
        rgba(255, 183, 124, 0.03) 50%,
        rgba(250, 251, 252, 0.9) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(132, 136, 239, 0.15);
    /* 启用硬件加速 */
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
}

/* 为iframe缩略图创建特殊容器 */
.preview-thumbnail.iframe-preview {
    display: block;
    align-items: unset;
    justify-content: unset;
    background: #fafbfc;
    position: relative;
    overflow: hidden;
    min-height: 0;
    max-height: none;
    height: auto;
}

.preview-thumbnail.markdown-preview {
    align-items: flex-start;
    justify-content: flex-start;
    background: #f8f9fa;
    padding: 16px 18px;
    box-sizing: border-box;
    max-height: 320px;
}

.markdown-preview-content {
    width: 100%;
    font-size: 13px;
    line-height: 1.6;
    color: #374151;
    overflow: hidden;
}

.markdown-preview-content h1,
.markdown-preview-content h2,
.markdown-preview-content h3 {
    font-family: var(--font-body);
    font-size: 14px;
    margin: 10px 0 6px;
    color: #111827;
}

.markdown-preview-content p {
    margin: 6px 0;
}

.markdown-preview-content pre {
    background: #111827;
    color: #f9fafb;
    padding: 10px 12px;
    border-radius: 8px;
    overflow: hidden;
    font-size: 11px;
    line-height: 1.5;
}

.markdown-preview-content code {
    background: rgba(132, 136, 239, 0.12);
    padding: 2px 4px;
    border-radius: 4px;
}

.preview-thumbnail::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent;
    pointer-events: none;
    z-index: 1;
    /* 优化过渡效果 */
    transition: opacity 0.15s ease-out;
    opacity: 0;
    /* 启用硬件加速 */
    will-change: opacity;
    transform: translate3d(0, 0, 0);
}

.preview-thumbnail iframe {
    width: 1200px;  /* 设置较大的宽度以捕获完整页面 */
    height: 900px;   /* 设置较大的高度以捕获完整页面 */
    border: none;
    pointer-events: none;
    user-select: none;
    background: white;
    opacity: 1;
    transform: scale(1);
    transform-origin: top left;
    position: absolute;
    top: 0;
    left: 0;
    margin-top: 0;
    margin-left: 0;
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.preview-thumbnail img {
    width: 100%;
    height: 100%;
    max-height: 800px;
    object-fit: cover;
    border-radius: 4px;
}

.preview-thumbnail video {
    width: 100%;
    height: 100%;
    max-height: 800px;
    object-fit: cover;
    border-radius: 4px;
}

.preview-thumbnail audio {
    width: 100%;
    height: 100%;
    border-radius: 4px;
}

.preview-thumbnail iframe.loaded {
    opacity: 1;
}

.preview-thumbnail .loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #5f6368;
    font-size: 13px;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.9);
    padding: 8px 12px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.preview-thumbnail .loading-indicator i {
    animation: spin 1s linear infinite;
    color: #1a73e8;
}

.feed-skeleton-card {
    pointer-events: none;
    background: rgba(255, 255, 255, 0.86);
    box-shadow: 0 8px 28px rgba(132, 136, 239, 0.1);
}

.feed-skeleton-card:hover {
    transform: translate3d(0, 0, 0);
    box-shadow: 0 8px 28px rgba(132, 136, 239, 0.1);
}

.skeleton-media {
    position: relative;
    height: 168px;
    border-radius: 10px;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(132, 136, 239, 0.08), rgba(255, 183, 124, 0.08)),
        #f7f8fb;
    border-bottom: 1px solid rgba(132, 136, 239, 0.12);
}

.skeleton-media.is-tall {
    height: 208px;
}

.skeleton-media.is-short {
    height: 138px;
}

.skeleton-media::after,
.skeleton-line::after,
.skeleton-avatar::after,
.skeleton-like::after,
.preview-loading-layer::after {
    content: '';
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65), transparent);
    animation: skeletonShimmer 1.35s ease-in-out infinite;
}

.skeleton-pill,
.skeleton-action,
.skeleton-line,
.skeleton-avatar,
.skeleton-like {
    position: relative;
    display: block;
    overflow: hidden;
    background: rgba(132, 136, 239, 0.13);
}

.skeleton-pill {
    position: absolute;
    top: 12px;
    left: 12px;
    width: 74px;
    height: 24px;
    border-radius: 999px;
}

.skeleton-action {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
}

.skeleton-info {
    gap: 12px;
}

.skeleton-line {
    height: 13px;
    border-radius: 999px;
}

.skeleton-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex: 0 0 auto;
}

.skeleton-name {
    height: 12px;
}

.skeleton-like {
    width: 38px;
    height: 18px;
    border-radius: 999px;
    background: rgba(132, 136, 239, 0.1);
}

.preview-loading-layer {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: block;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(132, 136, 239, 0.06), rgba(255, 183, 124, 0.06)),
        rgba(250, 251, 252, 1);
    transition: opacity 0.22s ease, visibility 0.22s ease;
}

.preview-thumbnail.is-loaded .preview-loading-layer {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preview-thumbnail.is-loading iframe,
.preview-thumbnail.is-loading img,
.preview-thumbnail.is-loading video,
.preview-thumbnail.is-loading audio,
.preview-thumbnail.is-loading .markdown-preview-content {
    opacity: 0 !important;
}

.preview-thumbnail.is-loaded iframe,
.preview-thumbnail.is-loaded img,
.preview-thumbnail.is-loaded video,
.preview-thumbnail.is-loaded audio,
.preview-thumbnail.is-loaded .markdown-preview-content {
    opacity: 1;
    transition: opacity 0.22s ease;
}

.feed-state-message {
    width: min(100%, 520px);
    margin: auto; /* 在flex容器中完全居中 */
    padding: 28px 24px;
    /* border: 1px solid rgba(132, 136, 239, 0.16); */
    /* border-radius: 20px; */
    /* background: rgba(255, 255, 255, 0.84); */
    color: #4b5563;
    display: flex;
    justify-content: center;
    gap: 12px;
    font-size: 14px;
    /* box-shadow: 0 8px 28px rgba(132, 136, 239, 0.1); */
    align-items: center;
    flex-direction: column;
    /* 防止瀑布流布局覆盖 */
    position: static !important;
    left: auto !important;
    top: auto !important;
    transform: none !important;
}

.feed-state-message.error {
    color: #b42318;
    border-color: rgba(239, 68, 68, 0.18);
    background: rgba(255, 255, 255, 0.9);
}

.feed-state-message i {
    font-size: 18px;
}

.feed-state-message .noresult-placeholder {
    max-width: 200px;
    width: 100%;
    height: auto;
    margin: 0 auto 16px;
    display: block;
    border-radius: 12px;
}

/* 空状态文本样式 */
.feed-state-message .empty-state-text {
    font-size: 15px;
    color: #6b7280;
    margin-bottom: 16px;
    text-align: center;
    line-height: 1.6;
}

.feed-state-message .empty-state-text strong {
    color: #374151;
    font-weight: 600;
}

/* 热门推荐按钮样式 - 下划线文字按钮风格 */
.feed-state-message .hot-recommend-btn {
    background: none;
    border: none;
    padding: 0;
    font-size: 14px;
    font-weight: 500;
    color: #6366f1; /* YouVibe紫色辅助色 */
    cursor: pointer;
    position: relative;
    display: inline-block;
    transition: color 0.2s ease;
    margin-top: 4px;
}

/* 下划线效果 */
.feed-state-message .hot-recommend-btn::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1.5px;
    background: currentColor;
    transform: scaleX(1);
    transform-origin: left;
    transition: transform 0.2s ease;
}

/* Hover状态：下划线延伸 */
.feed-state-message .hot-recommend-btn:hover {
    color: #4f46e5; /* 深一点的紫色 */
}

.feed-state-message .hot-recommend-btn:hover::after {
    transform: scaleX(1.05);
}

/* Active状态：轻微下压 */
.feed-state-message .hot-recommend-btn:active {
    transform: translateY(1px);
}

/* 关注 tab 空状态引导按钮：与系统主按钮（header-pill-hot）同一设计语言——
 * 品牌色胶囊 + 暖色描边 + 柔和投影，hover 轻浮起、箭头右移 */
.feed-state-message .following-cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
    height: 40px;
    padding: 0 22px;
    border: 1px solid rgba(218, 109, 80, 0.35);
    border-radius: var(--radius-pill, 999px);
    background: var(--brand-primary, var(--accent, #f37058));
    color: #fff;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 620;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(218, 109, 80, 0.18);
    transition:
        transform var(--duration-fast, 140ms) var(--ease-medium),
        box-shadow var(--duration-fast, 140ms) var(--ease-medium),
        background var(--duration-fast, 140ms) var(--ease-fast);
}

.feed-state-message .following-cta-btn i {
    font-size: 11px;
    transition: transform var(--duration-fast, 140ms) var(--ease-medium);
}

.feed-state-message .following-cta-btn:hover {
    background: var(--accent-hover, #EF4E3C);
    transform: translateY(-1px);
    box-shadow: 0 8px 18px rgba(218, 109, 80, 0.26);
}

.feed-state-message .following-cta-btn:hover i {
    transform: translateX(2px);
}

.feed-state-message .following-cta-btn:active {
    transform: translateY(0);
    box-shadow: 0 3px 8px rgba(218, 109, 80, 0.2);
}

.feed-state-message .following-cta-btn:focus-visible {
    outline: 3px solid var(--accent-subtle, rgba(243, 112, 88, 0.25));
    outline-offset: 2px;
}

@keyframes skeletonShimmer {
    100% {
        transform: translateX(100%);
    }
}

@media (prefers-reduced-motion: reduce) {
    .skeleton-media::after,
    .skeleton-line::after,
    .skeleton-avatar::after,
    .skeleton-like::after,
    .preview-loading-layer::after {
        animation: none;
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.preview-thumbnail .file-icon {
    font-size: 48px;
    color: #6666ff;
    opacity: 0.7;
}

.file-card-info {
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(3px);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-radius: 0;
    position: relative;
    z-index: 2;
    /* 启用硬件加速 */
    transform: translate3d(0, 0, 0);
}

/* 新的卡片信息布局样式 */

.card-author-section {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.card-avatar {
    flex-shrink: 0;
}

.card-avatar img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 0px solid #6366f1;
    opacity: 0.9;
}

.card-header-name {
    font-size: 13px;
    font-weight: 600;
    color: #1f2937;
}

.card-description {
    font-family: var(--font-body);
    font-size: 13px;
    color: #111827;
    line-height: 1.4;
    margin-bottom: 6px;
}

.card-stats {
    display: flex;
    gap: 16px;
}

.card-stat-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: #6b7280;
}

.card-stat-item i {
    font-size: 14px;
    opacity: 0.7;
}

.card-stat-item span {
    font-weight: 500;
}

.action-btn {
    background: #f3f4f6;
    color: #6b7280;
    border: 1px solid #e5e7eb;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    cursor: pointer;
}

.action-btn i {
    font-size: 14px;
}

.action-btn.share-btn:hover {
    background: #6366f1;
    color: white;
    border-color: #6366f1;
    transform: translateY(-1px);
}

.preview-overlay {
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 3;
    pointer-events: none;
}

.preview-action-btn {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text2);
    border: 1px solid var(--border);
    width: 28px;
    height: 28px;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    pointer-events: auto;
    margin-left: auto;
}

.preview-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-actions .preview-action-btn {
    margin-left: 0;
}

.preview-action-btn.preview-delete-btn {
    background: rgba(255, 255, 255, 0.9);
    color: var(--error);
}

.preview-action-btn i {
    font-size: 13px;
}

.preview-action-btn:hover {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
    transform: translateY(-1px);
}

.preview-action-btn.preview-delete-btn:hover {
    background: var(--error);
    color: white;
    border-color: var(--error);
}

/* Animation for card removal */
@keyframes fadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.8);
    }
}

/* Heart beat animation for like button */
@keyframes heartBeat {
    0% {
        transform: scale(1);
    }
    14% {
        transform: scale(1.2);
    }
    28% {
        transform: scale(1);
    }
    42% {
        transform: scale(1.2);
    }
    70% {
        transform: scale(1);
    }
}

/* Like button hover effects */
.like-item {
    transition: all 0.2s ease;
    /* 确保点赞按钮有固定宽度，防止图标切换时宽度变化 */
    min-width: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.like-item:hover {
    transform: scale(1.05) !important;
}

.like-item .like-icon {
    transition: all 0.2s ease;
    /* 确保图标有固定宽度 */
    min-width: 14px;
    text-align: center;
}

.like-item:hover .like-icon {
    filter: brightness(1.1);
}

/* Directory card specific styles */
.directory-card .preview-thumbnail {
    position: relative;
}

.directory-overlay {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
    z-index: 3;
}

.directory-overlay i {
    font-size: 10px;
}

/* Category Filters Styles */
.category-filters {
    background: transparent;
    width: 100%;
}

.category-filters-container {
    flex: 1 1 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    flex-wrap: nowrap;
    padding: 0;
}

.category-search-summary {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    min-width: 0;
    color: #374151;
    font-size: 14px;
    font-weight: 500;
    line-height: 1.45;
    letter-spacing: 0;
    overflow: hidden;
}

.category-search-summary-loading {
    display: none;
    color: #64748b;
}

.category-search-summary-result {
    display: inline-flex;
    align-items: center;
    min-width: 0;
}

.category-search-summary strong {
    color: #171d2b;
    font-weight: 800;
}

.category-search-summary[hidden] {
    display: none !important;
}

.category-search-summary.is-loading .category-search-summary-loading {
    display: inline;
}

.category-search-summary.is-loading .category-search-summary-result {
    display: none;
}

.category-filters.is-search-active .category-filters-container,
.category-filters.is-search-active .category-scroll-controls {
    display: none !important;
}

/* 关注 tab 未登录时用 hidden 属性隐藏；.category-btn 的 display:flex
 * 会覆盖 UA 的 [hidden] 规则，这里显式兜底 */
.category-btn[hidden] {
    display: none !important;
}

.category-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    height: 40px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease;
    font-size: 14px;
    font-weight: 500;
    color: #6b7280;
    min-width: auto;
    white-space: nowrap;
}

/* 只在支持真正hover的设备上应用hover效果 */
@media (hover: hover) {
    .category-btn:hover {
        color: #4f46e5;
        border-bottom-color: rgba(99, 102, 241, 0.5);
    }

    .category-btn.active:hover {
        color: #4f46e5;
        border-bottom-color: #4f46e5;
    }
}

.category-btn.active {
    background: transparent;
    color: #6366f1;
    border-bottom-color: #6366f1;
}

.category-btn span {
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header {
        padding: 8px 16px 6px;
    }

    .header-main {
        gap: 4px;
    }

    .header-top {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
    }

    .header-actions {
        justify-content: space-between;
    }

    .header-actions > .header-pill-hot {
        display: none;
    }

    .header-user-menu {
        left: auto;
        right: 0;
        width: min(236px, calc(100vw - 32px));
        max-width: calc(100vw - 32px);
        transform-origin: top right;
    }

    .header-user-card {
        gap: 6px;
        padding: 6px;
        border-radius: 12px;
    }

    .header-user-card img {
        width: 34px;
        height: 34px;
    }

    .header-user-card strong {
        font-size: var(--text-body-sm);
    }

    .header-user-card span {
        font-size: var(--text-caption);
    }

    .header-user-menu-item {
        min-height: var(--control-height);
        gap: 6px;
        margin-top: 6px;
        padding: 0 8px;
        font-size: var(--text-body-sm);
        border-radius: 10px;
    }

    .search-bar {
        height: 40px;
        padding: 0 14px;
    }

    .category-filters.visible {
        padding: 8px 0;
    }

    .category-filters-container {
        gap: 8px;
        padding: 0 15px;
        justify-content: flex-start;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        flex-wrap: nowrap;
    }

    .category-filters-container::-webkit-scrollbar {
        display: none;
    }

    .category-btn {
        padding: 0 12px;
        height: 36px;
        flex-shrink: 0;
    }

    .category-btn span {
        font-size: var(--text-body);
    }
}

@media (max-width: 480px) {

    .category-filters.visible {
        padding: 6px 0;
    }

    .category-filters-container {
        gap: 6px;
        padding: 0 10px;
    }

    .category-search-summary {
        padding: 0 10px;
        font-size: 13px;
    }

    .category-btn {
        padding: 0 10px;
        height: 34px;
    }

    .category-btn span {
        font-size: 12px;
    }
}

@keyframes yv-welcome-drawer-in {
    from {
        opacity: 0;
        transform: translateY(28px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Section Styles */
.hero-section {
    height: 85vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    background: transparent;
    margin-top: -100px;
    padding-top: 100px;
    box-sizing: border-box;
}

/* Hero区域响应式位置调整 */
@media (min-width: 1600px) {
    .hero-section {
        height: 80vh;
        padding-top: 80px;
        justify-content: center;
    }
}

/* 笔记本屏幕优化 - 减小hero区域高度，让用户看到更多卡片 */
@media (min-width: 1200px) and (max-width: 1599px) {

    .hero-section {
        height: 70vh;  /* 从82vh减小到70vh */
        padding-top: 70px;  /* 从90px减小到70px */
        justify-content: center;
    }

}

@media (min-width: 992px) and (max-width: 1199px) {

    .hero-section {
        height: 68vh;  /* 从84vh减小到68vh */
        padding-top: 65px;  /* 从95px减小到65px */
    }

    /* 中等屏幕文件名优化 */
    .card-work-title {
        font-size: 13px;
        max-width: 140px;
    }
}

@media (min-width: 769px) and (max-width: 991px) {

    .hero-section {
        height: 75vh;  /* 减小高度让用户看到更多内容 */
        padding-top: 80px;  /* 减小顶部间距 */
    }
}

/* 打字动画效果 - 简化版本，无光标 */
.typewriter-text {
    display: inline-block;
    white-space: nowrap;
    min-height: 1.2em; /* 确保有固定高度，避免页面跳动 */
}

/* 初始状态为空，避免闪烁 */
.typewriter-text:empty::before {
    content: '\00A0'; /* 不间断空格，保持高度 */
    opacity: 0;
}

/* 渐入效果 */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 按钮延迟出现动画 */

@keyframes fadeInButton {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 固定按钮样式 */
.fixed-share-btn {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(96.41deg, #8488EF 1.89%, #FFB77C 97.64%);
    color: white;
    padding: 16px 32px;
    font-size: 1.25rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 32px rgba(132, 136, 239, 0.3);
    min-width: 180px;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.fixed-share-btn:hover {
    transform: translateX(-50%) translateY(-2px);
    box-shadow: 0 12px 40px rgba(132, 136, 239, 0.4);
}

.fixed-share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Responsive design */
@media (max-width: 768px) {
    .hero-section {
        height: 88vh;
        padding-top: 120px;
        justify-content: center;
    }

    /* 移动端调整背景图片 */

    .fixed-share-btn {
        padding: 14px 28px;
        font-size: 1.1rem;
        min-width: 160px;
    }

    .fixed-share-btn {
        bottom: 20px;
    }
}

@media (max-width: 768px) {
    /* 为主内容区域添加顶部间距，避免被固定导航栏遮挡 */
    main {
        padding-top: 160px !important;
    }

    .gallery-container {
        /* 移除column布局 */
        /* column-count: 1; */
        /* column-gap: 0; */
        padding: 20px 10px;
    }

    .file-preview-card {
        margin-bottom: 20px;
        width: 100%;
    }

    .preview-thumbnail {
        min-height: 250px;
        max-height: 400px;
        overflow: cover;
        position: relative;
    }

    .preview-thumbnail.iframe-preview {
        min-height: 0;
        max-height: none;
    }

    .preview-thumbnail iframe {
        width: 1200px;
        height: 900px;
        transform-origin: top left;
        position: absolute;
        top: 0;
        left: 0;
        margin-top: 0;
        margin-left: 0;
    }

    .preview-thumbnail img {
        max-height: 300px;
    }

    .preview-thumbnail video {
        max-height: 250px;
    }

    .card-author-section {
        flex-direction: row;
        align-items: center;
    }

    .card-stats {
        gap: 12px;
    }

    .card-stat-item {
        font-size: var(--text-caption);
    }

    .card-stat-item i {
        font-size: var(--text-body-sm);
    }
}

@media (max-width: 480px) {
    .hero-section {
        height: 90vh;
        padding-top: 60px;
        justify-content: center;
    }

    /* 小屏幕调整背景图片 */

    .fixed-share-btn {
        padding: 12px 24px;
        font-size: 1rem;
        min-width: 140px;
    }

    .fixed-share-btn {
        bottom: 15px;
    }

    /* 小屏幕下文件名更短 */
    .card-work-title {
        font-size: 12px;
        max-width: 120px;
    }

    /* 小手机增加顶部间距，避免被更高的导航栏遮挡 */
    main {
        padding-top: 180px !important;
    }

    .gallery-container {
        /* 移除column布局 */
        /* column-count: 1; */
        /* column-gap: 0; */
        padding: 15px 8px;
    }

    .file-preview-card {
        margin-bottom: 15px;
        width: 100%;
    }

    .preview-thumbnail {
        min-height: 200px;
        max-height: 300px;
        overflow: hidden;
        position: relative;
    }

    .preview-thumbnail.iframe-preview {
        min-height: 0;
        max-height: none;
    }

    .preview-thumbnail iframe {
        width: 1200px;
        height: 900px;
        transform-origin: top left;
        position: absolute;
        top: 0;
        left: 0;
        margin-top: 0;
        margin-left: 0;
    }

    .preview-thumbnail img {
        max-height: 250px;
    }

    .preview-thumbnail video {
        max-height: 200px;
    }

    .card-work-title {
        font-size: 13px;
        margin-bottom: 1px;
    }

    .card-avatar img {
        width: 24px;
        height: 24px;
    }

    .card-stats {
        gap: 8px;
    }

    .card-stat-item {
        font-size: 10px;
    }

    .card-stat-item i {
        font-size: 11px;
    }

}

@media (max-width: 768px) {
    body.community-theme {
        --yv-mobile-fab-clearance: calc(max(18px, env(safe-area-inset-bottom)) + 60px);
    }

    .mobile-download-fab {
        position: fixed;
        left: 18px;
        right: 18px;
        bottom: max(18px, env(safe-area-inset-bottom));
        z-index: 1800;
        height: 48px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border: 0;
        border-radius: 999px;
        background: var(--accent);
        color: #fff;
        box-shadow: 0 8px 28px rgba(243, 112, 88, 0.28);
        font-family: var(--font-body);
        font-size: var(--text-subheading);
        font-weight: 700;
        cursor: pointer;
        transition: transform var(--duration-fast) var(--ease-fast), box-shadow var(--duration-fast) var(--ease-fast);
    }

    .mobile-download-fab:active {
        transform: scale(0.97);
        box-shadow: 0 4px 16px rgba(243, 112, 88, 0.22);
    }

    .mobile-download-fab i {
        font-size: var(--text-subheading);
    }

    body.community-theme {
        padding-bottom: calc(76px + env(safe-area-inset-bottom));
    }

    /* 底部浮层统一避让固定下载按钮。 */
    .yv-compare-basket {
        bottom: var(--yv-mobile-fab-clearance) !important;
        max-height: calc(100dvh - var(--yv-mobile-fab-clearance) - 16px);
        overflow-y: auto;
    }

    .yv-compare-toast,
    .auth-feedback-toast,
    .yv-credit-toast {
        bottom: var(--yv-mobile-fab-clearance) !important;
    }
}
body.mobile-rank-open .hot-rank-header span {
    display: none;
}
body.mobile-rank-open .rank-legal {
    display: none;
}
body.mobile-rank-open .mobile-download-fab,
body.modal-open .mobile-download-fab,
body:has(.login-modal:not([aria-hidden="true"])) .mobile-download-fab,
body:has(.download-modal-overlay.active) .mobile-download-fab {
    display: none !important;
}
@media (max-width: 768px) {
    .community-theme .category-btn {
        border: none !important;
        border-bottom: 2px solid transparent !important;
        border-radius: 0 !important;
        background: transparent !important;
        box-shadow: none !important;
    }
    .community-theme .category-btn.active {
        border-bottom-color: var(--accent) !important;
        background: transparent !important;
        box-shadow: none !important;
    }
    .community-theme .category-new-badge {
        right: -6px;
        top: 4px;
    }
    .community-theme .content-filter-strip {
        padding: var(--space-md) var(--layout-page-gutter);
    }
    .feed-filter-popover {
        right: 0;
        width: calc(100vw - var(--layout-page-gutter) * 2) !important;
        padding: var(--space-md) !important;
        border-radius: var(--radius-control) !important;
    }
    .feed-filter-section {
        gap: var(--space-sm) !important;
    }
    .feed-filter-section + .feed-filter-section {
        margin-top: var(--space-md) !important;
    }
    .feed-filter-option {
        height: 36px !important;
        padding: 0 var(--space-sm) !important;
        border-radius: var(--radius-element) !important;
    }
    .feed-filter-title {
        margin-bottom: var(--space-sm) !important;
    }
}