/* ===================== 全局重置 ===================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "微软雅黑", Arial, sans-serif;
    background-color: #ffffff;
    text-align: center;
    line-height: 1.6;
}

/* ===================== 顶部导航栏 ===================== */
#top-bar {
    background: #fff;
    padding: 10px 0;
    border-bottom: 2px solid #e0e0e0;
}

.container {
    width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Logo 和二维码容器 */
.logo-qr-container {
    display: flex;
    align-items: center;
    gap: 20px;
    justify-content: center;
}

#logo img {
    height: 80px;
}

.qr-code-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

#qr-code img {
    height: 80px;
}

#site-url {
    font-size: 16px;
    color: #333;
    padding: 5px 10px;
    border: 2px solid #333;
    border-radius: 5px;
    background: #fff;
}

/* 广告 */
.ad-container {
    margin-left: 20px;
}

.ad-container a img {
    width: 350px;
    height: 90px;
    border-radius: 5px;
}

/* ===================== 导航菜单 ===================== */
#nav, .duplicate-nav {
    padding-top: 5px;
}

#nav ul, .duplicate-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 20px;
    padding: 10px 0;
    margin: 0;
}

#nav ul li, .duplicate-nav ul li {
    display: inline;
}

#nav ul li a, .duplicate-nav ul li a {
    text-decoration: none;
    font-size: 16px;
    color: #333;
    padding: 8px 15px;
    transition: 0.3s;
}

#nav ul li a:hover, .duplicate-nav ul li a:hover {
    color: #d9534f;
}

.duplicate-nav { margin-top: 0px; }
#nav { border-top: 8px solid #003366; }
.duplicate-nav-divider { border-top: 1px solid #ccc; margin-top: 5px; }

/* ===================== 主体内容 ===================== */
.content {
    width: 50%;
    margin: 20px auto;
    padding: 15px;
    border: 1px solid #ccc;
    background-color: #f9f9f9;
    border-radius: 5px;
}

h2 {
    text-align: left;
    color: #003366;
    margin-bottom: 20px;
}

p {
    text-align: left;
    font-size: 16px;
    line-height: 1.8;
    color: #333;
}

/* ===================== 响应式 ===================== */
@media (max-width: 1024px) {
    .container { width: 90%; flex-direction: column; align-items: center; }
    .logo-qr-container { flex-direction: column; gap: 10px; }
    .qr-code-container { flex-direction: column; gap: 5px; text-align: center; }
    .ad-container { margin-top: 10px; text-align: center; }
    #nav ul, .duplicate-nav ul { flex-direction: column; align-items: center; gap: 10px; }
}

/* ===================== header 样式 ===================== */
header {
    background-color: #3b3f43;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header img {
    width: 80px;
    height: 80px;
    margin-bottom: 10px;
}

header h1 {
    font-size: 28px;
}

/* ===================== 栏目内容 ===================== */
.main-content {
    width: 100%;
    max-width: 980px;
    margin: 0 auto;
    padding: 40px 0;
}

.column-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.column {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 20px;
    transition: transform 0.3s;
}

.column:hover { transform: scale(1.05); }

.section-title {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
    font-size: 22px;
    font-weight: 500;
    color: #333333;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 5px;
    display: inline-block;
    text-align: center;
}

/* 文章列表 */
.column ul { list-style: none; padding: 0; }
.column ul li a {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
    font-size: 13px;
    color: #666666;
    text-decoration: none;
    font-weight: 400;
    display: block;
    padding: 10px 0;
    transition: color 0.3s ease;
}

.column ul li a:hover { color: #007bff; }

/* 最新资讯框 */
.news-box {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 20px;
    margin-top: 30px;
}

.news-box h2 {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
    font-size: 22px;
    font-weight: 500;
    color: #333;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 5px;
}

.news-box ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.news-box ul li {
    font-size: 13px;
    color: #555;
}

.news-box ul li a {
    text-decoration: none;
    color: #666666;
    font-weight: 400;
}

.news-box ul li a:hover { color: #79414b; }

/* ===================== 底部 ===================== */
footer {
    background-color: #3b3f43;
    color: #fff;
    padding: 10px;
    text-align: center;
}

footer p { font-size: 14px; }

/* ===================== 公告栏 ===================== */
.announcement {
    background: linear-gradient(135deg, #fff8e7, #fbeacc);
    border: 2px solid #d4af37;
    border-radius: 12px;
    padding: 15px 20px;
    margin: 25px auto;
    font-size: 16px;
    color: #5a4633;
    text-align: center;
    max-width: 990px;
    box-shadow: 0 4px 10px rgba(212, 175, 55, 0.25);
}

.announcement h3 {
    font-size: 22px;
    color: #a62c2b;
    font-family: "KaiTi", "SimSun", serif;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px #d4af37;
    border-bottom: 2px solid #d4af37;
    display: inline-block;
    padding-bottom: 4px;
}

.announcement p {
    font-size: 16px;
    color: #5a4633;
    line-height: 1.8;
    margin: 0;
}

/* ===================== 网址导航栏 ===================== */
.site-navigation {
    width: 990px;
    margin: 20px auto;
    background: #ffffff;
    padding: 10px 15px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.site-navigation h2 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    text-transform: uppercase;
    margin-bottom: 8px;
    display: inline-block;
    text-align: center;
}

.site-navigation ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0px;
    justify-content: center;
}

.site-navigation ul li {
    font-size: 13px;
    line-height: 1.5;
    padding: 2px 0;
}

.site-navigation ul li a {
    text-decoration: none;
    color: #5d8aa8;
    display: inline-block;
    transition: color 0.3s;
}

.site-navigation ul li a:hover { color: #007bff; }

/* ===================== 搜索框 ===================== */
.search-container {
    width: 990px;
    margin: 40px auto 20px auto;
    text-align: center;
}

.search-container input {
    width: 80%;
    max-width: 800px;
    height: 40px;
    border: 2px solid #ccc;
    border-radius: 20px;
    padding: 0 15px;
    font-size: 18px;
    outline: none;
}

.search-container button {
    height: 44px;
    padding: 0 25px;
    background-color: #3385ff;
    color: white;
    border: none;
    border-radius: 22px;
    font-size: 18px;
    cursor: pointer;
    margin-left: 10px;
    transition: background-color 0.3s;
}

.search-container button:hover { background-color: #2a75e6; }

.search-hints p {
    color: gray;
    font-size: 14px;
    margin: 2px 0;
}

/* ===================== 图片区域 ===================== */
.image-links {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
    margin-top: 20px;
    max-width: 990px;
    margin-left: auto;
    margin-right: auto;
}

.image-links a { display: block; width: 100%; }

.image-links img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
    transition: transform 0.3s ease-in-out;
}

.image-links img:hover { transform: scale(1.05); }

/* ===================== 标题居中辅助类 ===================== */
.centered-title {
    display: inline-block;
    text-align: center;
    margin: 20px auto;
    border-bottom: 2px solid #e0e0e0;
    padding-bottom: 5px;
}