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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    background: #f0f2f5;
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* 头部样式 */
header {
    text-align: center;
    background: white;
    padding: 30px 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2em;
    color: #1877f2;
    margin-bottom: 8px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.95em;
    color: #65676b;
    font-weight: 400;
}

/* 搜索区域 */
.search-section {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

#ipInput {
    flex: 1;
    padding: 10px 12px;
    font-size: 15px;
    border: 1px solid #dddfe2;
    border-radius: 6px;
    outline: none;
    transition: all 0.2s;
    background: #f0f2f5;
    color: #050505;
}

#ipInput:focus {
    background: white;
    border-color: #1877f2;
    box-shadow: 0 0 0 2px rgba(24, 119, 242, 0.1);
}

#ipInput::placeholder {
    color: #8a8d91;
}

button {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    background: #1877f2;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

button:hover {
    background: #166fe5;
}

button:active {
    background: #1564d6;
    transform: scale(0.98);
}

.btn-icon {
    font-size: 1em;
}

.quick-actions {
    display: flex;
    justify-content: center;
}

.btn-secondary {
    background: #e4e6eb;
    color: #050505;
}

.btn-secondary:hover {
    background: #d8dadf;
}

.btn-secondary:active {
    background: #ced0d4;
}

/* 加载动画 */
.loading {
    background: white;
    border-radius: 8px;
    padding: 32px;
    text-align: center;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.loading p {
    color: #1877f2;
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 16px;
    border: 3px solid #e4e6eb;
    border-top: 3px solid #1877f2;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* 错误提示 */
.error {
    background: #ffebe9;
    border: 1px solid #f02849;
    color: #c41c00;
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 0.9em;
}

/* IP信息显示 */
.ip-info {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.info-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid #e4e6eb;
}

.info-header h2 {
    color: #050505;
    font-size: 1.6em;
    font-weight: 600;
}

.ip-type {
    padding: 6px 12px;
    background: #e7f3ff;
    color: #1877f2;
    border-radius: 6px;
    font-size: 0.85em;
    font-weight: 600;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.info-item {
    padding: 16px;
    background: #f0f2f5;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: all 0.2s;
}

.info-item:hover {
    background: #e4e6eb;
}

.info-label {
    font-size: 0.85em;
    color: #65676b;
    font-weight: 600;
}

.info-value {
    font-size: 1em;
    color: #050505;
    font-weight: 500;
    word-break: break-all;
}

/* 地图容器 */
.map-container {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #e4e6eb;
}

.map-container h3 {
    color: #050505;
    margin-bottom: 12px;
    font-size: 1.2em;
    font-weight: 600;
}

.map-link {
    padding: 12px;
    background: #f0f2f5;
    border-radius: 6px;
    font-size: 0.9em;
}

.map-link p {
    color: #65676b;
    margin-bottom: 8px;
}

.map-link a {
    color: #1877f2;
    text-decoration: none;
    font-weight: 600;
}

.map-link a:hover {
    text-decoration: underline;
}

/* 使用说明 */
.instructions {
    background: white;
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.instructions h3 {
    color: #1877f2;
    margin-bottom: 16px;
    font-size: 1.3em;
    font-weight: 600;
}

.instructions ul {
    list-style-position: inside;
    margin-bottom: 16px;
    color: #65676b;
    font-size: 0.9em;
    line-height: 1.8;
}

.instructions li {
    padding: 4px 0;
    color: #050505;
}

.api-notice {
    background: #fff3cd;
    border: 1px solid #ffc107;
    padding: 12px;
    border-radius: 6px;
    font-size: 0.9em;
    color: #856404;
}

.api-notice strong {
    color: #050505;
}

.api-notice a {
    color: #1877f2;
    text-decoration: none;
    font-weight: 600;
}

.api-notice a:hover {
    text-decoration: underline;
}

/* 页脚 */
footer {
    text-align: center;
    padding: 20px 0;
    color: #65676b;
    font-size: 0.85em;
}

footer p {
    margin: 4px 0;
}

footer a {
    color: #1877f2;
    text-decoration: none;
    font-weight: 600;
}

footer a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    header {
        padding: 20px 16px;
    }

    header h1 {
        font-size: 1.6em;
    }

    .search-section {
        padding: 16px;
    }

    .search-box {
        flex-direction: column;
    }

    button {
        width: 100%;
        justify-content: center;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }

    .info-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .instructions {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.4em;
    }

    .subtitle {
        font-size: 0.85em;
    }

    .info-header h2 {
        font-size: 1.3em;
    }
}