html {
    overflow-y: scroll;
}

:root {
    --primary-color: #4a90e2;
    --text-color: #000000; /* 修改为纯黑 */
    --bg-color: #f4f7f6;
    /* 调整侧边栏背景为半透明 */
    --sidebar-bg: rgba(255, 255, 255, 0.25);
    --sidebar-width: 280px;
    --transition: all 0.3s ease;
    /* 添加玻璃拟态通用样式变量 */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: 1px solid rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
    --glass-blur: blur(5px);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /* 设置背景图片 */
    background: url('../images/background.webp') no-repeat center center fixed;
    background-size: cover;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}
html { scroll-behavior: smooth; }

/* 侧边栏样式 */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    /* 应用磨砂玻璃效果 */
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: var(--glass-border);
    box-shadow: var(--glass-shadow);
    display: flex;
    flex-direction: column;
    padding: 2rem;
    z-index: 1000;
    transition: var(--transition);
}

.profile {
    text-align: center;
    margin-bottom: 2rem;
}

.avatar img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 1rem;
    border: 3px solid var(--primary-color);
}

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

.profile p {
    color: #000000; /* 修改为纯黑 */
    font-size: 0.9rem;
}

.trouble-nav-card {
    position: fixed;
    right: 1.5rem;
    top: 4.5rem;
    width: 260px;
    z-index: 1200;
    border: var(--glass-border);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--glass-shadow);
}

nav ul {
    list-style: none;
}

nav li {
    margin-bottom: 0.5rem;
}

nav a {
    display: flex;
    align-items: center;
    padding: 0.8rem 1rem;
    color: #000000; /* 修改为纯黑 */
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
}

nav a:hover, nav a.active {
    background-color: var(--primary-color);
    color: white;
}

nav a i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}

.social-links {
    margin-top: auto;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.social-links a {
    color: #000000; /* 修改为纯黑 */
    font-size: 1.2rem;
    transition: var(--transition);
}
.social-links img {
    width: 2.4rem;
    height: 2.4rem;
    display: block;
}

.social-links a:hover {
    color: var(--primary-color);
}

/* 主内容区域样式 */
.main-content {
    margin-left: var(--sidebar-width);
    padding: 3rem;
    transition: var(--transition);
    overflow-x: hidden;
    padding-bottom: 3rem;
}

.page-upload .main-content {
    padding-top: 1rem;
}

.page-upload .full-width-card.full-height .card {
    padding-top: 0;
}

.section {
    display: block; /* 取消原本的 display: none, 因为现在是多页应用 */
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #000000; /* 修改为纯黑 */
}

.intro {
    font-size: 1.2rem;
    color: #000000; /* 修改为纯黑 */
    margin-bottom: 3rem;
}

/* 卡片样式 */
.full-width-card {
    width: 100%;
    min-height: calc(100vh - 6rem);
    height: auto;
    display: flex;
}

.full-width-card.full-height .card {
    flex: 1;
    min-height: auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; /* 内容从顶部开始 */
    align-items: flex-start; /* 内容左对齐 (如果需要居中请改为 center) */
    text-align: left; /* 文本左对齐 */
    padding-top: 3rem; /* 顶部留出一些空间 */
}

.full-width-card .card {
    min-height: 300px; /* 设置最小高度，方便撰写内容 */
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.card {
    /* 磨砂玻璃效果 */
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

.violet-textbox {
    display: block;
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: 12px;
    border: var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--glass-shadow);
    color: #000000;
    font: inherit;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.violet-input {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border-radius: 12px;
    border: var(--glass-border);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--glass-shadow);
    color: #000000;
    font: inherit;
}

.violet-input:focus {
    outline: none;
    border-color: rgba(74, 144, 226, 0.6);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.18), var(--glass-shadow);
}

.upload-form-wrap {
    margin-top: 1rem;
}

.upload-form {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.form-row {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-label {
    font-weight: 700;
    color: #000000;
    padding-left: 0.2rem;
}

.form-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.form-message {
    min-height: 1.2rem;
    color: #000000;
}

#upload .card {
    align-items: stretch;
}

#upload .content-placeholder {
    width: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.25);
}

.card h3 {
    margin-bottom: 1rem;
}

.card p {
    color: #000000; /* 修改为纯黑 */
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn:hover {
    background-color: #357abd;
}

/* 内容区域通用样式 */
.content-placeholder ul {
    list-style-type: none; /* 移除默认的列表圆点 */
    padding-left: 0;
}

.qq-group-list {
    list-style-type: disc;
    padding-left: 1.25rem;
}

.qq-group-list li {
    border-left: none;
    padding-left: 0;
}

.content-placeholder li {
    color: #000000; /* 标题改为黑色 */
    font-weight: bold; /* 加粗 */
    margin-top: 0.5rem; /* 减小标题上方的间距 */
    margin-bottom: 0.1rem; /* 减小标题与描述之间的间距 */
    font-size: 1.1rem;
    padding-left: 1rem; /* 增加左侧内边距 */
    border-left: 4px solid var(--primary-color); /* 蓝色竖线装饰移到标题 */
    line-height: 1.2; /* 紧凑行高 */
}

.content-placeholder ul.qq-group-list {
    list-style-type: disc;
    padding-left: 1.25rem;
}

.content-placeholder ul.qq-group-list > li {
    border-left: none;
    padding-left: 0;
}

.content-placeholder,
.content-placeholder p,
.content-placeholder span,
.content-placeholder li {
    overflow-wrap: anywhere;
    word-break: break-word;
}

.content-placeholder img,
.content-placeholder svg {
    max-width: 100%;
    height: auto;
}

.content-placeholder span:not(.download-count):not(#download-count-num):not(#open-count-num):not(.download-count-text):not(.group-count):not(.group-current):not(.group-total) {
    display: block;
    color: #000000; /* 描述改为黑色 */
    margin-bottom: 0.6rem; /* 减小描述下方的间距 */
    padding-left: 1rem; /* 保持与标题对齐的缩进 */
    border-left: none; /* 移除描述的竖线 */
    line-height: 1.4;
}

.content-placeholder a {
    color: var(--primary-color);
    text-decoration: underline;
}

.content-placeholder .download-btn {
    color: #ffffff;
    text-decoration: none;
}

.group-count {
    display: inline-flex;
    align-items: baseline;
    gap: 0.1rem;
    white-space: nowrap;
    margin-left: 0.5rem;
    color: #000000;
}

.menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    right: 1rem;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    box-shadow: var(--glass-shadow);
    padding: 0.8rem;
    border-radius: 8px;
    z-index: 2000;
    cursor: pointer;
}

/* 主题切换按钮不再使用，保持占位或可在 HTML 中移除 */
.theme-toggle {
    display: none;
}

.site-footer {
    position: static;
    margin-left: var(--sidebar-width);
    padding: 0.75rem 3rem;
    text-align: center;
    font-size: 0.9rem;
    color: #000000;
}

.site-footer a {
    color: #000000;
    text-decoration: none;
}

.site-footer a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}
.site-uptime {
    margin-top: 0.35rem;
    font-size: 0.9rem;
}
.site-uptime .uptime-days {
    font-weight: 800;
    background: linear-gradient(90deg, #7ad0f8 0%, #E6E6FA 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-fill-color: transparent;
    display: inline-block;
    transition: transform 0.2s ease;
}
@keyframes uptime-bump {
    0% { transform: scale(1); filter: brightness(1); }
    35% { transform: scale(1.12); filter: brightness(1.05); }
    100% { transform: scale(1); filter: brightness(1); }
}
.uptime-bump { animation: uptime-bump 0.6s cubic-bezier(0.2, 0.8, 0.2, 1); }

/* 暗色模式相关样式已停用，页面仅保留明亮主题 */

/* 响应式设计 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 2rem 1.5rem;
    }
    
    .menu-toggle {
        display: block;
    }

    .theme-toggle {
        right: 4.25rem;
    }

    .full-width-card {
        height: auto;
    }

    .site-footer {
        margin-left: 0;
        padding: 0.75rem 1.5rem;
    }
}