* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
    background: #f0f2f5;
    color: #333;
}

/* 登录页 */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    width: 360px;
}

.login-card h1 {
    font-size: 20px;
    text-align: center;
    margin-bottom: 24px;
    color: #333;
}

.form-item { margin-bottom: 16px; }
.form-item label { display: block; margin-bottom: 6px; font-size: 14px; color: #555; }
.form-item input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}
.form-item input:focus { border-color: #667eea; outline: none; }

.error-msg { color: #e74c3c; font-size: 13px; min-height: 18px; margin-bottom: 8px; }

/* 按钮 */
.btn-primary {
    display: block;
    width: 100%;
    padding: 10px;
    background: #667eea;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 15px;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
}
.btn-primary:hover { background: #5568d3; }

.btn-link {
    background: none;
    border: none;
    color: #667eea;
    cursor: pointer;
    font-size: 13px;
    margin-left: 8px;
}

/* 顶栏 */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background: #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}
.topbar .logo { font-weight: bold; color: #667eea; }

/* 内容区 */
.content { padding: 40px; max-width: 1200px; margin: 0 auto; }
.content h2 { margin-bottom: 16px; }