/* 全局样式重置和基础设置 */

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

/* 阅读进度条 */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: #39C5BB;
    width: 0%;
    z-index: 10000;
    transition: width 0.1s ease-out;
}

:root {
    --primary-color: #333;
    --secondary-color: #666;
    --accent-color: #6b46c1;
    --bg-color: #f5f5f5;
    --card-bg: #fff;
    --border-color: #e0e0e0;
    --hover-color: #f0f0f0;
    --text-color: #333;
    --light-text: #999;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* 暗夜模式变量 */
body.dark-mode,
html.dark-mode-init body {
    --primary-color: #e0e0e0;
    --secondary-color: #b0b0b0;
    --accent-color: #9f7aea;
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --border-color: #404040;
    --hover-color: #3a3a3a;
    --text-color: #e0e0e0;
    --light-text: #888;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'SimSun', 'Songti SC', 'STSong', 'NSimSun', '宋体', serif;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-color);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: inherit;
}

/* 通用容器 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* 通用头部 */
.header {
    background-color: var(--card-bg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.back-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
}

.back-btn:hover {
    background-color: var(--hover-color);
    border-color: var(--text-color);
}

/* 通用卡片样式 */
.card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

/* 底部备案号 */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--light-text);
    font-size: 12px;
}

.footer a {
    color: var(--secondary-color);
    text-decoration: none;
}

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

/* 右下角悬浮按钮组 */
.floating-buttons {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1000;
}

.floating-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--card-bg);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    color: var(--secondary-color);
    font-size: 20px;
    text-decoration: none;
}

.floating-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.floating-btn svg {
    width: 20px;
    height: 20px;
}

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

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

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--light-text);
    cursor: pointer;
    padding: 4px;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-color);
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.modal-body {
    color: var(--secondary-color);
    line-height: 1.6;
}

/* 友链样式 */
.friend-link {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    margin: var(--spacing-sm);
    background-color: var(--bg-color);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.friend-link:hover {
    background-color: var(--hover-color);
    transform: translateY(-1px);
}

.friend-link-title {
    font-weight: 600;
    color: var(--primary-color);
}

.friend-link-desc {
    font-size: 12px;
    color: var(--light-text);
    margin-top: 4px;
}

/* 公众号订阅样式 */
.wechat-qr {
    text-align: center;
    padding: var(--spacing-lg);
}

.wechat-qr img {
    max-width: 200px;
    margin: 0 auto var(--spacing-md);
}

.wechat-qr p {
    color: var(--secondary-color);
    font-size: 14px;
}

/* 暗夜模式切换按钮 */
.dark-mode-toggle {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--card-bg);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    color: var(--secondary-color);
    font-size: 20px;
    z-index: 999;
}

.dark-mode-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.dark-mode-toggle svg {
    width: 20px;
    height: 20px;
}

/* 悬浮按钮组调整（为暗夜模式按钮腾出空间） */
.floating-buttons {
    bottom: 84px;
}

/* 标题紧凑化 */
h1, h2, h3, h4, h5, h6 {
    letter-spacing: 0.3px;
    margin-top: 0;
}

h1 {
    font-size: 28px;
    margin-bottom: 16px;
}

h2 {
    font-size: 22px;
    margin-bottom: 14px;
}

h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.page-title {
    letter-spacing: 0.5px;
}

.modal-title {
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

/* 响应式设计 - 手机端优化 */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 16px;
        --spacing-xl: 24px;
    }

    .main-content {
        padding: var(--spacing-md);
        padding-bottom: 100px; /* 为固定底部留出空间 */
    }

    .header {
        padding: var(--spacing-sm) var(--spacing-md);
        flex-wrap: wrap;
    }

    .page-title {
        font-size: 20px;
    }

    /* 悬浮按钮移动端适配 */
    .floating-buttons {
        bottom: 16px;
        right: 16px;
        gap: 8px;
    }

    .floating-btn {
        width: 40px;
        height: 40px;
    }

    .floating-btn svg {
        width: 18px;
        height: 18px;
    }

    /* 暗夜模式按钮移动端适配 */
    .dark-mode-toggle {
        bottom: 16px;
        right: 16px;
        width: 40px;
        height: 40px;
    }

    .dark-mode-toggle svg {
        width: 18px;
        height: 18px;
    }

    /* 悬浮按钮组调整（为暗夜模式按钮腾出空间） */
    .floating-buttons {
        bottom: 72px;
    }

    /* 模态框移动端适配 */
    .modal-content {
        width: 95%;
        padding: var(--spacing-lg);
        max-height: 85vh;
    }

    /* Footer移动端适配 */
    .footer {
        padding: var(--spacing-md) var(--spacing-sm);
        font-size: 11px;
    }

    .footer p {
        line-height: 1.8;
    }
}

/* 非首页页面字体加大 */
body:not(.home-page) {
    font-size: 18px;
}

body:not(.home-page) .header {
    padding: 20px 32px;
}

body:not(.home-page) .page-title {
    font-size: 26px;
}

/* 非首页页面移动端适配 */
@media (max-width: 768px) {
    body:not(.home-page) {
        font-size: 16px;
    }

    body:not(.home-page) .header {
        padding: 12px 16px;
    }

    body:not(.home-page) .page-title {
        font-size: 20px;
    }
}

/* 非首页标题加粗 */
body:not(.home-page) h1 {
    font-weight: 700;
}

body:not(.home-page) h2 {
    font-weight: 700;
}

body:not(.home-page) h3 {
    font-weight: 700;
}

/* 分类页导航标题居中 */
.category-nav .nav-categories {
    display: flex;
    gap: 8px;
    flex: 1;
    justify-content: center;
}

.category-nav .nav-item {
    font-size: 16px;
    padding: 8px 18px;
}

/* ============ 鼠标跟随星星特效 ============ */
.star-trail {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    font-size: 14px;
    animation: starFade 1s ease-out forwards;
}

@keyframes starFade {
    0% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
    100% {
        opacity: 0;
        transform: scale(0.5) rotate(180deg) translateY(-20px);
    }
}

/* ============ 两侧文字图案装饰 ============ */
.side-decoration {
    position: fixed;
    bottom: 80px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    line-height: 1.2;
    white-space: pre;
    color: #888;
    opacity: 0.15;
    pointer-events: none;
    z-index: 1;
    user-select: none;
}

.side-decoration.left {
    left: 8px;
}

.side-decoration.right {
    right: 8px;
}

/* 左上角装饰图案 */
.top-left-decoration {
    position: fixed;
    top: 60px;
    left: 8px;
    font-family: 'Courier New', monospace;
    font-size: 11px;
    line-height: 1.2;
    white-space: pre;
    color: #888;
    opacity: 0.15;
    pointer-events: none;
    z-index: 1;
    user-select: none;
}

/* 页面下方装饰图案 */
.bottom-decoration {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Courier New', monospace;
    font-size: 11px;
    line-height: 1.2;
    white-space: pre;
    color: #888;
    opacity: 0.15;
    pointer-events: none;
    z-index: 1;
    user-select: none;
}

/* 暗夜模式下的图案 */
body.dark-mode .side-decoration,
html.dark-mode-init .side-decoration {
    color: #aaa;
    opacity: 0.3;
}

body.dark-mode .top-left-decoration,
html.dark-mode-init .top-left-decoration,
body.dark-mode .bottom-decoration,
html.dark-mode-init .bottom-decoration {
    color: #aaa;
    opacity: 0.25;
}

/* 移动端隐藏装饰图案 */
@media (max-width: 1200px) {
    .side-decoration,
    .top-left-decoration,
    .bottom-decoration {
        display: none;
    }
}