/* 站点布局与侧边栏（各页面共用） */
body {
    background-color: #1e1e1e;
    color: #d4d4d4;
    display: flex;
    height: 100vh;
    overflow: hidden;
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.sidebar {
    width: 180px;
    background-color: #161616;
    display: flex;
    flex-direction: column;
    border-right: 1px solid #2d2d2d;
    flex-shrink: 0;
}

.sidebar-nav {
    padding: 20px 12px;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
    color: #fff;
}

.logo h1 {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
}

.logo p {
    font-size: 12px;
    color: #999;
    margin-top: 4px;
}

.nav-menu {
    list-style: none;
}

.nav-menu li {
    margin-bottom: 10px;
}

.nav-menu li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    color: #b3b3b3;
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    transition: background 0.2s;
}

.nav-menu li a:hover {
    background-color: #2a2a2a;
    color: #fff;
}

.nav-menu li a.active {
    background-color: #0e639c;
    color: #fff;
}

.sidebar-ad {
    margin-top: auto;
    padding: 16px;
    border-top: 1px solid #2d2d2d;
    text-align: center;
}

.ad-box {
    background-color: #252526;
    border-radius: 6px;
    padding: 12px;
    font-size: 12px;
    color: #888;
}

.ad-box .contact-email {
    color: #9cdcfe;
    text-decoration: none;
    word-break: break-all;
}

.ad-box .contact-email:hover {
    text-decoration: underline;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-width: 0;
}

@media (max-width: 768px) {
    body {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        flex-direction: row;
        border-right: none;
        border-bottom: 1px solid #2d2d2d;
    }

    .sidebar-nav {
        flex: 1;
        padding: 10px;
    }

    .logo {
        margin-bottom: 10px;
        text-align: left;
    }

    .logo h1 {
        font-size: 16px;
    }

    .logo p {
        font-size: 11px;
    }

    .nav-menu {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
    }

    .nav-menu li {
        margin-bottom: 0;
    }

    .sidebar-ad {
        display: none;
    }

    .main-content {
        height: calc(100vh - 60px);
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 14px;
    }
}