/* ===== 全局重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary-color: #0ea5e9;
    --secondary-color: #06b6d4;
    --sidebar-bg: #1e293b;
    --text-muted: #94a3b8;
    --border-color: rgba(94, 234, 212, 0.2);
    --hover-color: #38bdf8;
    --card-bg: rgba(15, 23, 42, 0.7);
    --text-light: #e2e8f0;
}

html,
body {
    height: 100%;
    overflow: hidden;
    background: #0f172a;
    color: var(--text-light);
}

body {
    display: flex;
}

/* ===== 左侧菜单 ===== */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
    z-index: 10;
}

.logo-container {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    font-weight: 700;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.version {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.nav-menu {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    margin: 4px 12px;
    border-radius: 10px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.nav-item:hover {
    background: rgba(56, 189, 248, 0.1);
    color: var(--text-light);
}

.nav-item.active {
    background: linear-gradient(90deg, rgba(14, 165, 233, 0.2), transparent);
    color: var(--hover-color);
    border-left: 3px solid var(--hover-color);
    padding-left: 17px;
}

.nav-icon {
    width: 24px;
    margin-right: 14px;
    text-align: center;
    font-size: 18px;
}

.nav-text {
    font-size: 0.95rem;
    font-weight: 500;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

/* ===== 右侧主区域（顶部 + iframe） ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--sidebar-bg);
}

/* ---- 顶部（保留） ---- */
.header {
    padding: 20px 30px;
    background: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    flex-shrink: 0;
}

.page-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-light);
}

.page-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
}

/* ---- iframe 容器 ---- */
.iframe-wrapper {
    flex: 1;
    overflow: hidden;
    background: #0f172a;
}

.iframe-wrapper iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }

    .logo-text,
    .nav-text,
    .version,
    .sidebar-footer {
        display: none;
    }

    .logo-container {
        justify-content: center;
        padding: 20px 10px;
    }

    .nav-item {
        justify-content: center;
        padding: 14px 10px;
        margin: 4px 8px;
    }

    .nav-icon {
        margin-right: 0;
    }

    .header {
        padding: 15px 20px;
    }

    .page-title {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 56px;
    }

    .logo {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .nav-item {
        padding: 10px 6px;
        margin: 2px 4px;
    }

    .nav-icon {
        font-size: 14px;
    }

    .header {
        padding: 10px 14px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .page-title {
        font-size: 1rem;
    }

    .page-subtitle {
        font-size: 0.7rem;
    }

    .user-avatar {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
}

body {
    background-color: #0f172a;
    /*background-image: url('../images/index_ditu.jpeg');*/
    background-size: cover;
    background-position: center center;
    background-attachment: fixed;
    background-repeat: no-repeat;
}
/*以下为登录*/
/* 登录模态框 */
.login-modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}
.login-box {
    background: white;
    padding: 30px 40px;
    border-radius: 10px;
    width: 320px;
    position: relative;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.close-btn {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 24px;
    cursor: pointer;
    color: #999;
}
.close-btn:hover {
    color: #333;
}
.login-box input {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}
.login-box button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}
.login-box button:hover {
    background: #0056b3;
}
#loggedInInfo p {
    margin: 8px 0;
}
#loggedInInfo button {
    width: 48%;
    margin: 5px 1%;
    display: inline-block;
}