/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s;
}

a:hover {
    color: #007bff;
}

ul {
    list-style: none;
}

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

/* Header */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    padding: 15px 0;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    font-size: 16px;
    color: #555;
}

nav ul li a.active,
nav ul li a:hover {
    color: #007bff;
}

/* Hero Section */
.hero {
    background-color: #2c3e50;
    color: #fff;
    padding: 60px 0;
    text-align: center;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 15px;
}

.hero p {
    font-size: 18px;
    opacity: 0.9;
}

/* Content */
.content {
    min-height: 400px;
}

.notice-board {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 40px;
    border-left: 5px solid #007bff;
}

.notice-board h2 {
    margin-bottom: 15px;
    font-size: 22px;
    color: #2c3e50;
}

.notice-board p {
    margin-bottom: 10px;
    color: #666;
}

.articles-placeholder h3 {
    font-size: 20px;
    margin-bottom: 20px;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

.card {
    background: #fff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 6px;
    border: 1px solid #eee;
}

.card h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.card .meta {
    font-size: 12px;
    color: #999;
    margin-bottom: 10px;
}

.card .excerpt {
    font-size: 14px;
    color: #666;
}

/* Footer */
footer {
    background-color: #333;
    color: #999;
    padding: 30px 0;
    text-align: center;
    margin-top: 60px;
    font-size: 14px;
}

footer p {
    margin-bottom: 10px;
}

footer a {
    color: #ccc;
}

footer a:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 15px;
    }
    
    nav ul li {
        margin: 0 10px;
    }
}