:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;

    /* 新增主题相关变量 */
    --bg-color: #f9f9f9;
    --text-color: #333;
    --content-bg: white;
    --code-bg: #f5f5f5;
    --border-color: #eee;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

/* 深色主题变量 */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --content-bg: #2d2d2d;
        --code-bg: #1e1e1e;
        --border-color: #444;
        --shadow-color: rgba(0, 0, 0, 0.3);
    }
}

/* 手动切换主题的类 */
.dark-mode {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --content-bg: #2d2d2d;
    --code-bg: #1e1e1e;
    --border-color: #444;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

.container-card {
    background: var(--content-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-top: 2rem;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
}

header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
}

#content {
    background: var(--content-bg);
    padding: 2rem;
    border-radius: 8px;
    margin-top: 2rem;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s, box-shadow 0.3s;
}

/* Markdown styling */
#content h2 {
    color: var(--primary-color);
    margin-top: 2rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--border-color);
}

#content pre {
    background: var(--code-bg);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    font-family: "Courier New", Courier, monospace;
    font-size: 1em;
    white-space: pre;
    line-height: 1.5;
    transition: background-color 0.3s;
}

#content code {
    background: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: monospace;
    transition: background-color 0.3s;
}

.loading {
    text-align: center;
    color: var(--text-color);
    padding: 2rem;
    opacity: 0.7;
}

/* 主题切换按钮样式 */
.theme-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    transition: all 0.3s;
    z-index: 100;
}

.theme-toggle:hover {
    transform: scale(1.1);
}

.theme-toggle i {
    transition: transform 0.3s;
}