/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 容器样式 */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* 头部样式 */
.header {
    text-align: center;
    padding: 3rem 2rem 2rem;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1), rgba(80, 200, 120, 0.1));
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4a90e2, #50c878);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header h1 i {
    margin-right: 0.5rem;
    background: linear-gradient(135deg, #4a90e2, #50c878);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: #666;
    font-weight: 300;
}

/* 主要内容区域 */
.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

/* 查询按钮区域 */
.query-section {
    text-align: center;
    margin-bottom: 2rem;
}

.query-btn {
    background: linear-gradient(135deg, #4a90e2, #50c878);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 200px;
    justify-content: center;
}

.query-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.4);
    background: linear-gradient(135deg, #3a7bc8, #40a868);
}

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

.query-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 2rem;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #4a90e2;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

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

.loading p {
    color: #666;
    font-size: 1rem;
}

/* IP信息卡片 */
.ip-info {
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ip-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.ip-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f0f0f0;
}

.ip-header i {
    font-size: 1.5rem;
    color: #4a90e2;
}

.ip-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #333;
}

.ip-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1), rgba(80, 200, 120, 0.1));
    border-radius: 15px;
    border: 2px solid rgba(74, 144, 226, 0.2);
}

.ip-address {
    font-size: 2rem;
    font-weight: 700;
    font-family: 'Courier New', monospace;
    color: #2c3e50;
    background: linear-gradient(135deg, #4a90e2, #50c878);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.copy-btn {
    background: #4a90e2;
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    background: #3a7bc8;
    transform: scale(1.1);
}

.ip-details {
    display: grid;
    gap: 1rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: rgba(248, 249, 250, 0.8);
    border-radius: 10px;
    transition: all 0.3s ease;
}

.detail-item:hover {
    background: rgba(74, 144, 226, 0.1);
    transform: translateX(5px);
}

.detail-item i {
    color: #4a90e2;
    width: 20px;
    text-align: center;
}

.detail-item .label {
    font-weight: 600;
    color: #555;
    min-width: 80px;
}

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

/* IP地址说明区域 */
.ip-explanation {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.ip-explanation h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    color: #333;
}

.ip-explanation h3 i {
    color: #4a90e2;
}

.ip-explanation p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(248, 249, 250, 0.8);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(74, 144, 226, 0.1);
    transform: translateY(-2px);
}

.feature-item i {
    color: #4a90e2;
    font-size: 1.5rem;
    margin-top: 0.2rem;
}

.feature-item h4 {
    font-size: 1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.3rem;
}

.feature-item p {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.5;
    margin: 0;
}

/* 错误信息 */
.error-message {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 99, 99, 0.3);
    animation: fadeInUp 0.6s ease;
}

.error-message i {
    font-size: 3rem;
    color: #ff6b6b;
    margin-bottom: 1rem;
}

.error-message p {
    color: #666;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.retry-btn {
    background: #ff6b6b;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 2rem;
    background: rgba(248, 249, 250, 0.8);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: #666;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        padding: 2rem 1rem 1.5rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .ip-card, .ip-explanation {
        padding: 1.5rem;
    }
    
    .ip-address {
        font-size: 1.5rem;
    }
    
    .ip-display {
        flex-direction: column;
        gap: 1rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .detail-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }
    
    .detail-item .label {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .query-btn {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        min-width: 180px;
    }
    
    .ip-address {
        font-size: 1.3rem;
    }
    
    .ip-card, .ip-explanation {
        padding: 1rem;
    }
}