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

:root {
    --bg-color: #f8f9fa;
    --sidebar-bg: #ffffff;
    --main-bg: #f8f9fa;
    --text-color: #1a1a1a;
    --text-muted: #6c757d;
    --border-color: #e9ecef;
    --card-bg: #ffffff;
    --accent-color: #007bff;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --glow-color: rgba(0, 123, 255, 0.4);
    --platform-icon-filter: grayscale(100%);
    --platform-icon-opacity: 0.4;
}

[data-theme="dark"] {
    --bg-color: #282828;
    --sidebar-bg: #3C3C3C;
    --main-bg: #282828;
    --text-color: #f1f5f9;
    --text-muted: #aaaaaa;
    --border-color: #444444;
    --card-bg: #3C3C3C;
    --accent-color: #64b5f6;
    --shadow-color: rgba(0, 0, 0, 0.4);
    --platform-icon-filter: brightness(0) invert(1);
    --platform-icon-opacity: 0.7;
}

/* 夜间模式图标 - 黑转白精准处理 (取消悬停变色) */
[data-theme="dark"] .nav-icon,
[data-theme="dark"] .title-icon,
[data-theme="dark"] .nav-bottom-icon {
    filter: invert(1) grayscale(100%) brightness(2) !important;
    opacity: 0.85 !important;
}

/* 排行榜图标保持原色，不应用滤镜 */
[data-theme="dark"] .rank-icon {
    filter: none !important;
    opacity: 1 !important;
}

/* Logo 黑转白处理并调大 */
[data-theme="dark"] #main-site-logo {
    filter: invert(1) brightness(2) !important;
    opacity: 0.95 !important;
}

.site-logo {
    width: 100%; /* 放大至与导航同宽 */
    height: auto;
    display: block;
    object-fit: contain;
    transition: all 0.3s ease;
}

.sidebar-header {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    padding: 0; /* 移除内边距，让 Logo 满宽 */
}

html, body {
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    transition: background-color 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

/* ============ 侧边栏 ============ */
.sidebar {
    width: 120px; /* 缩小到原来的四分之三 */
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 15px 0px 0px 0px !important; /* 强制移除底部内边距 */
    position: fixed !important; /* 强制固定 */
    left: 0;
    top: 0;
    height: 100vh;
    height: 100dvh; /* 适配移动端动态视口高度 */
    overflow-y: auto !important; /* 恢复滚动条 */
    overflow-x: visible !important;
    z-index: 9999; /* 极高层级，防止被遮挡 */
    display: flex;
    flex-direction: column;
}

/* 隐藏侧边栏默认滚动条，仅保留美化后的 */
.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar-header, .nav-main {
    padding: 0 8px; /* 将内边距移到内部容器 */
}

/* 侧边栏滚动条美化 - 极简现代风格 */
.sidebar::-webkit-scrollbar { width: 5px; }
.sidebar::-webkit-scrollbar-thumb { 
    background: rgba(0, 0, 0, 0.05); /* 调得更透明 */
    border-radius: 10px; 
    transition: background 0.3s;
}
[data-theme="dark"] .sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.05); /* 调得更透明 */
}
.sidebar::-webkit-scrollbar-thumb:hover { 
    background: rgba(0, 0, 0, 0.2); 
}
[data-theme="dark"] .sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}
.sidebar::-webkit-scrollbar-track { background: transparent; }

.sidebar-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.nav-bottom {
    margin-top: auto;
    padding-top: 5px; /* 极致压缩顶部间距 */
    border-top: 1px solid var(--border-color);
    padding-bottom: 0px !important; /* 彻底移除底部间距 */
    margin-bottom: 0px !important;
    background: var(--sidebar-bg);
    position: sticky;
    bottom: 0;
    z-index: 10;
}

.sidebar-header {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    padding: 0;
}

.site-logo-link {
    display: block;
    width: 100%;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.site-logo-link:hover {
    opacity: 0.9;
}

.site-logo {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

.nav-icon {
    width: 18px;
    height: 18px;
    margin-right: 8px;
    object-fit: contain;
}

.sidebar-nav .nav-item {
    display: flex;
    flex-direction: column; /* 电脑端上下排列 */
    align-items: center;
    justify-content: center;
    padding: 10px 4px; /* 稍微收紧内边距 */
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 10px;
    margin-bottom: 6px; /* 稍微收紧项间距 */
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
    text-align: center;
}

.sidebar-nav .nav-item .nav-icon {
    width: 24px; /* 缩小图标尺寸 */
    height: 24px;
    margin-right: 0;
    margin-bottom: 4px; /* 缩小图标与文字间距 */
}

.sidebar-nav .nav-item:hover {
    background-color: var(--bg-color);
    color: var(--accent-color);
}

.sidebar-nav .nav-item.active {
    background-color: var(--accent-color);
    color: #ffffff;
}

/* 子分类悬停菜单样式 */
.nav-item-wrapper {
    position: relative;
    width: 100%;
}

.sub-nav-menu {
    position: fixed;
    left: 120px; /* 紧贴侧边栏 */
    top: 0;
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: 0 12px 12px 0;
    box-shadow: 5px 0 15px var(--shadow-color);
    padding: 10px;
    min-width: 140px;
    display: none; /* 初始隐藏，由 JS 控制 */
    flex-direction: column;
    gap: 2px;
    z-index: 10001;
    margin-left: -1px; /* 负边距确保视觉上无缝贴合 */
}

@media (max-width: 768px) {
    .sub-nav-menu {
        left: 120px !important; /* 手机端强制锁定 */
        margin-left: 0 !important;
    }
}

/* 增加透明伪元素填充间隙 */
.sub-nav-menu::before {
    content: "";
    position: absolute;
    left: -10px;
    top: 0;
    width: 10px;
    height: 100%;
    background: transparent;
}

/* 移除 CSS 悬停显示，改由 JS 控制以支持延迟消失 */
.nav-item-wrapper .sub-nav-menu {
    display: none;
}

/* 动态计算菜单位置 */
.nav-item-wrapper:hover .sub-nav-menu {
    top: auto;
}

.sub-nav-link {
    display: block;
    padding: 8px 12px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.sub-nav-link:hover {
    background: var(--bg-color);
    color: var(--accent-color);
}

/* ============ 主内容区域 ============ */
.main-content {
    flex: 1;
    margin-left: 120px;
    padding: 30px;
    width: calc(100% - 120px);
}

/* ============ 分类区块 ============ */
.category-section {
    margin-bottom: 40px;
    transition: all 0.5s ease;
    border-radius: 12px;
    padding: 10px;
    margin-left: -10px;
    margin-right: -10px;
}

/* 分类定位高亮特效 - 极淡版 */
.category-section.highlight-target {
    background-color: rgba(0, 123, 255, 0.04) !important; /* 极淡蓝色 */
    box-shadow: 0 0 10px rgba(0, 123, 255, 0.08) !important;
    transform: scale(1.002) !important;
}
[data-theme="dark"] .category-section.highlight-target {
    background-color: rgba(100, 181, 246, 0.06) !important;
    box-shadow: 0 0 10px rgba(100, 181, 246, 0.1) !important;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.category-title-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.title-icon {
    width: 26px;
    height: 26px;
    object-fit: contain;
}

.category-title {
    font-size: 20px;
    font-weight: 700;
}

.subcategory-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.subcategory-tab {
    padding: 4px 12px;
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.2s ease;
}

.subcategory-tab:hover {
    color: var(--accent-color);
}

.subcategory-tab.active {
    background-color: #3C3C3C;
    color: #ffffff;
    border-color: #3C3C3C;
}

/* ============ 卡片网格 ============ */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); /* 缩小卡片尺寸 */
    gap: 15px;
}

.cards-grid-wrapper {
    display: none;
}

.cards-grid-wrapper.active {
    display: block;
}

.category-section {
    margin-bottom: 40px;
    padding: 10px;
    transition: all 0.5s ease;
}

/* 高级感动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s cubic-bezier(0.23, 1, 0.32, 1) forwards;
}

.card {
    opacity: 0; /* 配合 JS 动画 */
}

.loading-skeleton {
    background: linear-gradient(90deg, var(--border-color) 25%, var(--bg-color) 50%, var(--border-color) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: 14px;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============ 卡片 ============ */
.card {
    position: relative;
    display: flex;
    align-items: center;
    height: 72px; /* 缩小卡片高度 */
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    overflow: visible;
}

.card-main-click {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    width: 100%;
    height: 100%;
}

.card:hover {
    transform: translateY(-6px) scale(1.02);
    border-color: var(--glow-color);
    box-shadow: 
        0 0 15px var(--glow-color),
        0 0 30px var(--glow-color),
        0 10px 20px rgba(0,0,0,0.1);
    z-index: 10;
}

.card-icon-wrapper {
    flex-shrink: 0;
    width: 42px; /* 缩小图标容器 */
    height: 42px;
    margin-right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.card:hover .card-icon {
    transform: scale(1.1);
}

.card-body {
    flex: 1;
    min-width: 0;
    padding-right: 5px;
}

.card-title {
    font-size: 14px; /* 进一步调小标题字号 */
    font-weight: 700;
    color: var(--text-color);
    margin-top: 4px; /* 标题向下移动，靠近简介 */
    margin-bottom: 0px; /* 彻底消除下方间距 */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-description {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0.9;
}

.card-platforms {
    position: absolute;
    top: 5px;
    right: 8px;
    gap: 5px;
    align-items: center;
    z-index: 2;
}

.card-more-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px !important; /* 进一步缩小尺寸 */
    height: 20px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f5;
    color: #bbb;
    border-radius: 50%;
    opacity: 0;
    transition: all 0.2s ease;
    z-index: 5;
}

.card-more-btn svg {
    width: 10px !important; /* 进一步缩小内部图标 */
    height: 10px !important;
}

@media (max-width: 768px) {
    .card-more-btn {
        opacity: 1 !important; /* 手机端常驻显示 */
        background: #f5f5f5; /* 还原原始灰色背景 */
        color: #bbb; /* 还原原始灰色图标 */
        top: 50%;
        transform: translateY(-50%);
    }
    [data-theme="dark"] .card-more-btn {
        background: #333;
        color: #777;
    }
}

[data-theme="dark"] .card-more-btn {
    background: #333;
    color: #777;
}

.card:hover .card-more-btn {
    opacity: 1;
}

.platform-icon {
    height: 12px; /* 按比例缩小平台图标 */
    width: auto;
    display: flex;
    align-items: center;
}

.platform-icon img {
    height: 100%;
    width: auto;
    filter: var(--platform-icon-filter);
    opacity: var(--platform-icon-opacity);
    transition: all 0.2s ease;
}

.platform-icon.platform-app img {
    filter: none !important;
    opacity: 1 !important;
}

.card:hover .platform-icon img {
    opacity: 0.9;
}

.platform-icon:hover img {
    opacity: 1;
    filter: none;
    transform: scale(1.3);
}

/* 顶部工具栏 */
.top-toolbar {
    position: fixed;
    top: 20px;
    right: 30px;
    z-index: 1000;
}

.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px var(--shadow-color);
}

/* 下载弹窗样式 */
.download-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.download-modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.download-modal-content {
    background: var(--card-bg);
    width: 90%;
    max-width: 450px;
    border-radius: 24px;
    padding: 30px;
    position: relative;
    transform: scale(0.8);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.download-modal-overlay.active .download-modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
}

.modal-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 30px;
    text-align: center;
}

.modal-logo {
    width: 80px;
    height: 80px;
    border-radius: 18px;
    margin-bottom: 15px;
    box-shadow: 0 8px 16px var(--shadow-color);
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-color);
}

.download-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-color);
    padding: 15px 20px;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.download-item:hover {
    border-color: var(--accent-color);
    background: var(--card-bg);
}

.download-platform-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.platform-icon-large {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.platform-details {
    display: flex;
    flex-direction: column;
}

.platform-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-color);
}

.platform-desc {
    font-size: 11px;
    color: var(--text-muted);
}

.btn-download-now {
    background: var(--accent-color);
    color: #fff;
    padding: 8px 20px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-download-now:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px var(--glow-color);
}

/* 友情链接样式 */
.footer-links {
    margin-top: 50px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.links-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-left: 10px;
    border-left: 4px solid var(--accent-color);
    color: var(--text-color);
}

.links-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.link-item {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    padding: 5px 12px;
    background: var(--bg-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.link-item:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar { 
        width: 60px; 
        padding: 10px 2px; 
        padding-bottom: env(safe-area-inset-bottom, 10px); /* 增加底部内边距适配安全区域 */
    }
    .sidebar-nav .nav-item { flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 8px 2px; font-size: 10px; gap: 4px; margin-bottom: 4px; }
    .sidebar-nav .nav-item .nav-icon { width: 20px; height: 20px; margin-bottom: 4px; }
    .nav-icon { margin-right: 0; width: 20px; height: 20px; }
    .sidebar-nav .nav-item span { width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .main-content { margin-left: 60px; width: calc(100% - 60px); padding: 10px; }
    /* 隐藏侧边栏时的布局适配 */
    body.hide-sidebar-mobile .sidebar { display: none !important; }
    body.hide-sidebar-mobile .main-content { margin-left: 0 !important; width: 100% !important; }
    body.hide-sidebar-mobile .top-toolbar { right: 10px !important; }
    .cards-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; padding: 5px; width: 100%; overflow: hidden; }
    .card { height: 70px; padding: 0; min-width: 0; width: 100%; }
    .card-main-click { padding: 6px 8px; }
    .card-icon-wrapper { width: 38px; height: 38px; margin-right: 8px; }
    .card-title { font-size: 13px; }
    .card-description { font-size: 10px; }
    .card-platforms { top: 3px; right: 5px; gap: 3px; }
    .platform-icon { height: 10px; }

    /* 手机端分类单行滑动 */
    .category-header { 
        display: flex !important;
        flex-direction: row !important; 
        align-items: center !important; 
        overflow: hidden !important; 
        white-space: nowrap !important; 
        padding: 10px 5px !important; 
        flex-wrap: nowrap !important;
    }
    .category-title-wrapper { 
        flex-shrink: 0 !important; 
        margin-right: 15px !important; 
        margin-bottom: 0 !important; 
        display: flex !important;
        align-items: center !important;
    }
    .category-title { font-size: 16px !important; white-space: nowrap !important; margin: 0 !important; }
    .subcategory-tabs { 
        display: flex !important; 
        flex-direction: row !important; 
        flex-wrap: nowrap !important;
        overflow-x: auto !important; 
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Firefox */
        flex: 1 !important;
    }
    .subcategory-tabs::-webkit-scrollbar { display: none !important; } /* Chrome/Safari */
    .subcategory-tab { 
        flex-shrink: 0 !important; 
        white-space: nowrap !important; 
        padding: 5px 10px !important; 
        margin-bottom: 0 !important; 
        font-size: 13px !important; 
        display: inline-block !important;
    }

    /* 更多弹窗样式 */
    .more-modal {
        display: none;
        position: fixed;
        z-index: 10000;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.5);
    }
    .more-modal-content {
        background-color: var(--sidebar-bg);
        margin: 20% auto;
        padding: 20px;
        border-radius: 12px;
        width: 80%;
        max-height: 70%;
        overflow-y: auto;
        position: relative;
    }
    .more-modal-close {
        position: absolute;
        right: 15px;
        top: 10px;
        font-size: 24px;
        cursor: pointer;
    }
    .more-modal-item {
        padding: 10px 0;
        border-bottom: 1px solid var(--border-color);
        color: var(--text-color);
        cursor: pointer;
    }
    .more-modal-item:last-child {
        border-bottom: none;
    }
    .more-modal-item:hover {
        color: var(--accent-color);
    }
    .top-toolbar { right: 10px !important; top: 10px !important; }
    .download-modal-content { width: 95%; max-width: 100%; border-radius: 16px; }
}

/* 排行榜页面样式 */
.rank-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.rank-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border-color);
}

.rank-tab {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

.rank-tab.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.rank-tab:hover {
    color: var(--accent-color);
}

.rank-list {
    display: grid;
    gap: 15px;
}

.rank-item {
    display: flex;
    align-items: center;
    padding: 15px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.rank-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px var(--shadow-color);
    border-color: var(--accent-color);
}

.rank-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 18px;
    margin-right: 15px;
    flex-shrink: 0;
}

.rank-item-info {
    flex: 1;
}

.rank-item-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 5px;
}

.rank-item-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.rank-item-views {
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-color);
    margin-left: 15px;
}

@media (max-width: 768px) {
    .rank-tabs {
        flex-wrap: wrap;
    }
    .rank-tab {
        padding: 10px 15px;
        font-size: 14px;
    }
    .rank-item {
        padding: 12px;
    }
    .rank-number {
        width: 35px;
        height: 35px;
        font-size: 16px;
        margin-right: 10px;
    }
    .rank-item-title {
        font-size: 14px;
    }
    .rank-item-desc {
        font-size: 12px;
    }
    .rank-item-views {
        font-size: 13px;
    }
}