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

body {
    font-family: 'Noto Sans SC', 'Arial', sans-serif;
    background-color: #f8f9fa;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 全屏布局 */
.layout-fullscreen {
    display: grid;
    grid-template-areas:
        "header"
        "main";
    grid-template-rows: 70px 1fr;
    min-height: 100vh;
    width: 100vw;
    background-color: #f8f9fa;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

.main-content-fullscreen {
    grid-area: main;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 70px);
    width: 100%;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
    margin: 0 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.system-title {
    margin-bottom: 30px;
    text-align: center;
}

.system-title h1 {
    color: #2c3e50;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 1px;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.login-box {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    width: 100%;
}

.login-box h2 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 30px;
    font-size: 24px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    color: #495057;
    font-size: 16px;
    transition: all 0.2s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
    background-color: #ffffff;
}

.login-btn {
    width: 100%;
    padding: 14px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.5px;
}

.login-btn:hover {
    background-color: #2980b9;
    box-shadow: 0 2px 5px rgba(52, 152, 219, 0.2);
}

.login-btn:active {
    transform: translateY(1px);
}

/* 管理员登录链接样式 */
.admin-link {
    text-align: center;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #eaeaea;
}

.admin-link a {
    color: #6c757d;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s ease;
}

.admin-link a:hover {
    color: #3498db;
    text-decoration: underline;
}

/* 表单消息样式 */
.form-message {
    margin-bottom: 15px;
    padding: 8px 0;
    text-align: center;
    font-size: 14px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.form-message.success {
    color: #155724;
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    padding: 8px;
}

.form-message.error {
    color: #e74c3c;
    background-color: #fdf2f2;
    border: 1px solid #fecaca;
}

.form-message.warning {
    color: #f39c12;
    background-color: #fef9e7;
    border: 1px solid #fdeaa7;
}

/* 适配移动设备 */
@media (max-width: 768px) {
    .system-title h1 {
        font-size: 24px;
        margin-bottom: 20px;
    }
    
    .login-box {
        padding: 25px 20px;
        margin: 10px;
    }
    
    .main-content-fullscreen {
        padding: 10px;
    }
    
    .login-box h2 {
        font-size: 22px;
        margin-bottom: 25px;
    }
    
    .form-group {
        margin-bottom: 20px;
    }
    
    .form-group input {
        padding: 12px 14px;
        font-size: 16px; /* 保持16px避免iOS缩放 */
        min-height: 44px; /* 确保触摸目标足够大 */
    }
    
    .login-btn {
        padding: 12px;
        font-size: 16px;
        min-height: 44px; /* 确保触摸目标足够大 */
    }
    
    .admin-link {
        margin-top: 15px;
        padding-top: 12px;
    }
    
    .admin-link a {
        font-size: 13px;
        padding: 8px 12px; /* 增加触摸区域 */
        display: inline-block;
    }
}

/* 小屏幕设备优化 */
@media (max-width: 480px) {
    .system-title h1 {
        font-size: 22px;
        margin-bottom: 15px;
    }
    
    .login-container {
        margin: 0 10px;
    }
    
    .login-box {
        padding: 20px 15px;
        border-radius: 6px;
    }
    
    .login-box h2 {
        font-size: 20px;
        margin-bottom: 20px;
    }
    
    .form-group input {
        padding: 10px 12px;
    }
    
    .login-btn {
        padding: 10px;
    }
    
    .form-message {
        font-size: 13px;
        padding: 6px 8px;
    }
}

/* 超小屏幕设备优化 */
@media (max-width: 360px) {
    .system-title h1 {
        font-size: 20px;
        margin-bottom: 12px;
    }
    
    .login-box {
        padding: 15px 12px;
    }
    
    .login-box h2 {
        font-size: 18px;
        margin-bottom: 18px;
    }
    
    .form-group {
        margin-bottom: 15px;
    }
    
    .form-group input {
        padding: 8px 10px;
    }
    
    .login-btn {
        padding: 8px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .login-btn:hover {
        background-color: #3498db; /* 移除hover效果，避免触摸设备上的问题 */
    }
    
    .form-group input:focus {
        box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2); /* 减少阴影强度 */
    }
    
    /* 增加触摸反馈 */
    .login-btn:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
}