:root {
    --primary-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(5px);
    --transition-normal: 0.3s ease;
}

body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(to bottom right, #00AFF0 0, #4169E1 100%);
    overflow: auto;
    position: relative;
    padding-top: 50px;
    color: #fff; /* Default text color */
}

.main, .title {
    position: relative;
    z-index: 1;
}

.main {
    width: 95%;
    max-width: 1200px;
    padding: 30px;
    box-sizing: border-box;
    border-radius: 20px;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow:
        0 4px 24px 0 rgba(0, 0, 0, 0.1),
        inset 0 0 20px 0 rgba(255, 255, 255, 0.05);
    z-index: 2;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.title {
    font-size: 50px;
    margin-bottom: 30px;
    text-align: center;
    text-decoration: none;
    color: #fff;
}

.flex-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 5px;
}

.flex-container > div {
    padding: 15px;
    text-align: left;
    box-sizing: border-box;
    flex-grow: 1;
}

.flex-container > div h3 {
    margin-top: 0;
    margin-bottom: 0.5em;
}

.flex-container > div ul {
    padding: 0;
    margin: 0;
    width: 100%;
    list-style: none;
}

.flex-container > div ul li {
    margin-bottom: 0.25em;
    position: relative;
    padding-left: 1em;
}

.flex-container > div ul li::before {
    content: "•";
    position: absolute;
    left: 0;
}

.flex-container > div ul li a {
    color: #fff;
    text-decoration: none;
}

/* 移动端样式 (max-width: 768px) */
@media (max-width: 768px) {
    .flex-container > div {
        flex-basis: calc(50% - 5px);
        margin: 0;
    }
}

@media (max-width: 480px) {
    .flex-container > div {
        flex-basis: 100%;
    }
}

#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(to bottom right, #00AFF0 0, #4169E1 100%);
}

a {
    text-decoration: none;
}

#time-container {
    position: relative;
    width: 95%;
    max-width: 1200px;
    margin-bottom: 20px; /* 向上偏移抵消间距 */
    z-index: 3;
}

#time {
    font-size: 48px; /* 调整字体大小 */
    text-align: center; /* 居中文本 */
    font-weight: bold;
}

#date {
    font-size: 24px; /* 调整字体大小 */
    text-align: center; /* 居中文本 */
    margin-bottom: 20px; 
}