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

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    position: relative;
    width: 100%;
    max-width: 480px;
    border-radius: 16px;
    text-align: center;
    padding: 40px 30px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    background-color: var(--container-bg-color);
    box-shadow: var(--container-shadow);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.links {
    margin-top: 20px;
}

.links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--link-bg-color);
    color: var(--link-text-color);
    padding: 12px 20px;
    margin: 0 10px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.links a:hover {
    background-color: var(--link-hover-bg-color);
    color: var(--link-hover-text-color);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
}

.theme-toggle {
    position: absolute;
    right: 0;
    top: 0;
    padding: 10px;
}

.theme-toggle button {
    border: 0;
    background-color: transparent;
    cursor: pointer;
}

/* icon */
.theme-icon {
    color: var(--text-color);
}

.footer {
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    padding: 10px;
}

.footer a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 14px;
}

/* 响应式：在小屏幕上缩小字体 */
@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    .links a {
        padding: 10px 16px;
        font-size: 0.95rem;
    }
}

/* 默认（亮色模式） */
:root {
    --bg-color: #f9f9f9;
    --text-color: #333;
    --container-bg-color: #ffffff;
    --container-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    --link-bg-color: #f0f4f8;
    --link-text-color: #2c3e50;
    --link-hover-bg-color: #2c3e50;
    --link-hover-text-color: white;
}

/* 暗色模式 */
[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #e6e6e6;
    --container-bg-color: #2b2b2b;
    --container-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --link-bg-color: #444;
    --link-text-color: #ddd;
    --link-hover-bg-color: #666;
    --link-hover-text-color: #fff;
}