/* IP查询系统 - 主样式文件 */

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-family: 'Microsoft YaHei', sans-serif;
}

.main-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.query-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: 500px;
    width: 100%;
    padding: 40px;
    text-align: center;
}

.query-title {
    color: #333;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.query-subtitle {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 30px;
}

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

.form-control {
    border: 2px solid #e1e5e9;
    border-radius: 15px;
    padding: 15px 20px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
    background: #fff;
}

.btn-query {
    background: linear-gradient(45deg, #667eea, #764ba2);
    border: none;
    border-radius: 15px;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-query:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
    color: white;
}

.btn-query:active {
    transform: translateY(0);
}

.btn-query::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-query:hover::before {
    left: 100%;
}

.btn-current-ip {
    background: linear-gradient(45deg, #28a745, #20c997);
    border: none;
    border-radius: 15px;
    padding: 15px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
    margin-left: 10px;
}

.btn-current-ip:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(40, 167, 69, 0.4);
    color: white;
}

.btn-current-ip:active {
    transform: translateY(0);
}

.button-group {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.result-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    padding: 25px;
    margin-top: 25px;
    border-left: 4px solid #667eea;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid #eee;
}

.result-item:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 600;
    color: #555;
}

.result-value {
    color: #333;
    font-weight: 500;
}

.loading {
    display: none;
    text-align: center;
    margin-top: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.spinner {
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* 功能特色区域 */
.feature-intro {
    margin: 30px 0;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.feature-item {
    display: flex;
    align-items: center;
    padding: 10px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 10px;
    font-size: 0.9rem;
    color: #555;
}

.feature-item i {
    margin-right: 8px;
    color: #667eea;
    width: 20px;
}

/* 功能介绍区域 */
.features-section {
    margin: 40px 0;
    padding: 30px 0;
    border-top: 1px solid #eee;
}

.section-title {
    text-align: center;
    color: #333;
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 30px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.feature-card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    color: #333;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 常见问题区域 */
.faq-section {
    margin: 40px 0;
    padding: 30px 0;
    border-top: 1px solid #eee;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 25px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.faq-item h3 {
    color: #333;
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.faq-item p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 页面底部 */
.page-footer {
    background: #f8f9fa;
    padding: 30px 0;
    text-align: center;
    margin-top: 40px;
    border-top: 1px solid #eee;
}

.footer-content p {
    margin: 5px 0;
    color: #666;
    font-size: 0.9rem;
}

/* 表单改进 */
.form-group {
    margin-bottom: 20px;
}

.form-text {
    font-size: 0.85rem;
    color: #666;
    margin-top: 5px;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* 结果区域改进 */
.result-section {
    margin-top: 30px;
}

.result-title {
    color: #333;
    font-size: 1.3rem;
    margin-bottom: 20px;
    text-align: center;
}

.result-content {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .query-card {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .query-title {
        font-size: 2rem;
    }
    
    .form-control {
        font-size: 1rem;
        padding: 12px 15px;
    }
    
    .btn-query {
        padding: 12px 30px;
        font-size: 1.1rem;
    }
    
    .button-group {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn-current-ip {
        margin-left: 0;
        width: 100%;
        max-width: 300px;
        padding: 12px 30px;
        font-size: 1.1rem;
    }
    
    .feature-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .faq-item {
        padding: 15px;
    }
}