/* 重置和基础样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --background-primary: #ffffff;
    --background-secondary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --radius-md: 8px;
    --radius-sm: 4px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--background-secondary);
    -webkit-font-smoothing: antialiased;
}

/* 容器布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 头部样式 */
header {
    text-align: center;
    padding: 2rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

header h1 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* 面包屑导航样式 */
.breadcrumb {
    margin-bottom: 2rem;
    padding: 0.5rem 0;
}

.breadcrumb ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin: 0 0.5rem;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* 页脚样式 */
footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* SEO 内容区域样式 */
.seo-content {
    margin-top: 4rem;
    padding: 2rem;
    background: var(--background-secondary);
    border-radius: var(--radius-md);
}

.seo-content h2 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.seo-content h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    margin: 2rem 0 1rem;
}

.seo-content p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.seo-content ul {
    list-style: none;
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.seo-content ul li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    position: relative;
}

.seo-content ul li::before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: -1.5rem;
}

/* 响应式调整 */
@media (max-width: 768px) {
    header {
        padding: 1.5rem 0;
    }

    header h1 {
        font-size: 2rem;
    }

    footer {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .footer-section {
        padding: 0;
    }

    .seo-content {
        padding: 1.5rem;
        margin-top: 3rem;
    }

    .faq-list {
        gap: 1rem;
    }

    .faq-item {
        padding: 1rem;
    }
}

/* 确保工具容器样式正确 */
.tool-container {
    background: var(--background-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-top: 2rem;
}

/* 工具内容区域样式 */
.tool-content {
    display: none;
    padding: 2rem;
}

.tool-content.active {
    display: block;
}

/* 工具头部样式 */
.tool-header {
    margin-bottom: 2rem;
}

.tool-header h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.tool-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

/* 导航栏样式 */
.tools-nav {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.tool-btn {
    flex: 1;
    min-width: 100px;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background-color: var(--background-secondary);
}

.tool-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tool-btn .icon {
    font-size: 1.2rem;
    margin-right: 0.5rem;
    display: inline-block;
}

/* 表单控件样式 */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--background-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%236b7280'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
    font-family: inherit;
    line-height: 1.5;
}

/* 按钮样式 */
.primary-btn, .secondary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-size: 1rem;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background-color: var(--primary-hover);
}

.secondary-btn {
    background-color: var(--background-secondary);
    color: var(--text-primary);
}

.secondary-btn:hover {
    background-color: #e5e7eb;
}

/* 统一的复制按钮样式 */
.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background-color: var(--background-secondary);
}

.copy-btn.copied {
    background-color: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

/* 结果项中的复制按钮统一样式 */
.result-item .copy-btn,
.masking-item .copy-btn,
.extract-item .copy-btn,
.format-item .copy-btn,
.validate-item .copy-btn,
.generate-item .copy-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    margin-left: auto;
}

/* 复制全部按钮样式 */
.copy-all-btn {
    width: 100%;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    border: none;
    margin-top: 1rem;
}

.copy-all-btn:hover {
    background-color: var(--primary-hover);
}

/* 结果显示区域 */
.results-container {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.result-item {
    padding: 1.25rem;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.result-item:hover {
    box-shadow: var(--shadow-md);
}

.result-number {
    font-family: 'Inter', monospace;
    font-size: 1.2rem;
    color: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
}

.result-meta {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

/* 状态样式 */
.valid-result {
    border-left: 4px solid var(--success-color);
}

.invalid-result {
    border-left: 4px solid var(--error-color);
}

.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.success-message {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .container {
        padding: 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    /* 容器调整 */
    .container {
        padding: 1rem;
        margin: 0;
    }

    /* 标题调整 */
    header {
        margin-bottom: 1.5rem;
    }

    h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    /* 导航按钮优化 */
    .tools-nav {
        flex-direction: row;
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 0.5rem;
        margin: 0 -1rem 1.5rem -1rem;
        padding: 0 1rem 0.5rem 1rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none; /* Firefox */
    }

    .tools-nav::-webkit-scrollbar {
        display: none; /* Chrome, Safari */
    }

    .tool-btn {
        flex: 0 0 auto;
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
        white-space: nowrap;
        min-width: calc(50% - 0.5rem);
    }

    /* 表单控件优化 */
    .input-group {
        margin-bottom: 1rem;
    }

    .form-control {
        padding: 0.875rem;
        font-size: 16px; /* 防止iOS自动缩放 */
    }

    select.form-control {
        padding-right: 2rem;
    }

    /* 按钮优化 */
    .primary-btn, .secondary-btn {
        width: 100%;
        padding: 1rem;
        margin-bottom: 0.5rem;
    }

    /* 结果显示优化 */
    .result-item, 
    .validation-item, 
    .format-item, 
    .masking-item, 
    .extract-item {
        padding: 1rem;
        margin-bottom: 0.75rem;
    }

    .result-number,
    .formatted,
    .masked,
    .extracted {
        font-size: 0.95rem;
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }

    .copy-btn {
        width: 100%;
        justify-content: center;
        padding: 0.75rem;
    }

    /* 工具内容区域优化 */
    .tool-header {
        padding: 1rem;
    }

    .tool-header h2 {
        font-size: 1.25rem;
    }

    .tool-body {
        padding: 1rem;
    }

    /* 文本域优化 */
    textarea.form-control {
        min-height: 100px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .form-control {
        font-size: 0.875rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.tool-content.active {
    animation: fadeIn 0.3s ease-out;
}

.result-item {
    animation: slideIn 0.3s ease-out;
}

/* 优化和额外样式 */
/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--background-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* 焦点状态优化 */
:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 加载状态 */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: calc(50% - 0.5rem);
    left: calc(50% - 0.5rem);
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--background-primary);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 工具提示 */
[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem;
    background-color: #1f2937;
    color: white;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: 10;
    animation: fadeIn 0.2s ease-out;
}

/* 页脚样式 */
footer {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* 无障碍优化 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 打印样式优化 */
@media print {
    body {
        background: white;
    }

    .container {
        max-width: none;
        padding: 0;
    }

    .tools-nav,
    .copy-btn,
    .primary-btn,
    .secondary-btn {
        display: none;
    }

    .tool-content {
        display: block;
        box-shadow: none;
    }
}

/* 验证结果样式优化 */
.validation-item, .format-item, .masking-item, .extract-item {
    padding: 1.25rem;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.validation-item.valid, 
.format-item.valid, 
.masking-item.valid, 
.extract-item.valid {
    border-left: 4px solid var(--success-color);
}

.validation-item.invalid, 
.format-item.invalid, 
.masking-item.invalid, 
.extract-item.invalid {
    border-left: 4px solid var(--error-color);
}

.formatted, .masked, .extracted {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
    font-family: 'Inter', monospace;
    font-size: 1.1rem;
    color: var(--primary-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 结果汇总区域样式 */
.extract-summary {
    margin-top: 1.5rem;
    padding: 1.25rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copy-all-btn {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-all-btn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

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

/* 更新 Copy All Numbers 按钮样式 */
#copyBtn {
    margin-top: 1rem;
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%; /* 让按钮宽度充满容器 */
}

#copyBtn:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

#copyBtn:active {
    transform: translateY(0);
}

#copyBtn.copied {
    background-color: var(--success-color);
}

/* 生成器结果容器样式优化 */
#results {
    margin-bottom: 1rem;
}

.phone-number {
    padding: 0.75rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
    font-family: 'Inter', monospace;
    font-size: 1.1rem;
    color: var(--primary-color);
}

/* 改进可访问性 */
.tool-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 添加键盘导航提示 */
[data-tooltip]:focus-visible::before {
    content: attr(data-tooltip) " (Press Enter)";
}

/* 小屏幕设备额外优化 */
@media (max-width: 480px) {
    /* 进一步缩小内边距 */
    .container {
        padding: 0.75rem;
    }

    /* 更紧凑的结果显示 */
    .result-item, 
    .validation-item, 
    .format-item, 
    .masking-item, 
    .extract-item {
        padding: 0.75rem;
    }

    /* 调整字体大小 */
    .tool-description,
    .result-meta,
    .error-message,
    .success-message {
        font-size: 0.8rem;
    }

    /* 优化按钮触摸区域 */
    .copy-btn,
    .primary-btn,
    .secondary-btn {
        min-height: 44px; /* 确保足够的触摸区域 */
    }
}

/* 横屏模式优化 */
@media (max-height: 600px) and (orientation: landscape) {
    .container {
        padding: 0.75rem;
    }

    header {
        margin-bottom: 1rem;
    }

    .tools-nav {
        margin-bottom: 1rem;
    }

    .tool-header {
        position: sticky;
        top: 0;
        background: var(--background-primary);
        z-index: 10;
        border-bottom: 1px solid var(--border-color);
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    /* 移除悬停效果 */
    .tool-btn:hover,
    .copy-btn:hover,
    .primary-btn:hover,
    .secondary-btn:hover {
        transform: none;
    }

    /* 添加触摸反馈 */
    .tool-btn:active,
    .copy-btn:active,
    .primary-btn:active,
    .secondary-btn:active {
        opacity: 0.7;
    }
}

/* 自定义掩码选项样式 */
.custom-masking-options {
    margin: 1rem 0;
    padding: 1.25rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.custom-masking-options .input-group {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.custom-masking-options .input-group:last-child {
    margin-bottom: 0;
}

.custom-masking-options label {
    flex: 0 0 150px;
    margin-bottom: 0;
}

.custom-masking-options input[type="number"] {
    width: 80px;
    padding: 0.5rem;
    text-align: center;
}

.custom-masking-options input[type="text"] {
    width: 50px;
    padding: 0.5rem;
    text-align: center;
}

.mask-preview {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-family: monospace;
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .custom-masking-options {
        padding: 1rem;
    }

    .custom-masking-options .input-group {
        flex-direction: column;
        align-items: flex-start;
    }

    .custom-masking-options label {
        margin-bottom: 0.5rem;
    }

    .custom-masking-options input[type="number"],
    .custom-masking-options input[type="text"] {
        width: 100%;
        max-width: 200px;
    }
}

.phone-number {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
}

.phone-number span {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.copy-all-btn {
    margin-top: 1rem;
    width: 100%;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .custom-masking-options {
        padding: 0.75rem;
    }
    
    .custom-masking-options .input-group {
        margin-bottom: 0.75rem;
    }
}

/* 帮助按钮样式 */
.help-btn {
    margin-left: 0.5rem;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: none;
    background-color: var(--text-secondary);
    color: white;
    font-size: 14px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    transition: all 0.2s ease;
}

.help-btn:hover {
    background-color: var(--primary-color);
    transform: scale(1.1);
}

/* 帮助模态框样式 */
.help-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.help-modal-content {
    background-color: var(--background-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.2s ease-out;
}

.help-modal-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.help-modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.help-modal-body {
    padding: 1.5rem;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

.close-btn:hover {
    color: var(--text-primary);
}

/* 帮助内容样式 */
.help-section {
    color: var(--text-primary);
}

.help-section h4 {
    margin: 1.5rem 0 0.5rem;
    color: var(--primary-color);
}

.help-section h4:first-child {
    margin-top: 0;
}

.help-section p {
    margin: 0.5rem 0;
    line-height: 1.6;
}

.help-section ul, 
.help-section ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

.help-section li {
    margin: 0.25rem 0;
}

.help-section pre {
    background-color: var(--background-secondary);
    padding: 1rem;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-family: monospace;
    margin: 0.5rem 0;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .help-modal-content {
        width: 95%;
        margin: 1rem;
    }
    
    .help-modal-header {
        padding: 1rem;
    }
    
    .help-modal-body {
        padding: 1rem;
    }
}

/* 下拉列表样式 */
select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: var(--background-primary) url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpath d='M3 5l3 3 3-3'/%3E%3C/svg%3E") no-repeat right 0.75rem center;
    background-size: 12px;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    color: var(--text-primary);
    width: 100%;
    max-width: 300px;
    cursor: pointer;
    position: relative;
}

/* 确保下拉菜单向下展开 */
select option {
    background: var(--background-primary);
    color: var(--text-primary);
    padding: 0.5rem;
}

/* 下拉列表容器样式 */
.select-container {
    position: relative;
    width: 100%;
    max-width: 300px;
    margin-bottom: 1rem;
}

/* 提取工具样式 */
#extractor .tool-body {
    padding: 1.5rem;
}

#extractor .input-group textarea {
    width: 100%;
    min-height: 150px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    line-height: 1.5;
    resize: vertical;
}

#extractor .button-group {
    margin: 1.5rem 0;
    text-align: left;
}

#extractor .results-container {
    margin-top: 1.5rem;
    margin-left: 0;
    margin-right: 0;
}

.extract-item {
    background: var(--background-secondary);
    border-radius: var(--radius-sm);
    padding: 1rem;
    margin-bottom: 1rem;
}

.extract-item .original {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.extract-item .extracted {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.extract-item .country {
    color: var(--primary-color);
    font-weight: 500;
}

.extract-item .number {
    font-family: monospace;
    font-size: 1.1rem;
}

.extract-item .copy-btn {
    margin-left: auto;
    padding: 0.25rem 0.75rem;
    font-size: 0.9rem;
    background: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.extract-item .copy-btn:hover {
    background: var(--background-hover);
}

.extract-item.valid {
    border-left: 3px solid var(--success-color);
}

.extract-item.invalid {
    border-left: 3px solid var(--error-color);
}

.no-results {
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem;
}

.tool-example {
    margin-top: 1rem;
    padding: 1rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tool-example h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tool-example pre {
    background-color: var(--background-primary);
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    margin: 0.5rem 0;
}

.tool-example ul {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0;
}

.tool-example li {
    font-family: monospace;
    padding: 0.25rem 0;
    color: var(--text-secondary);
}

.tool-example p {
    margin: 0.5rem 0;
    color: var(--text-secondary);
}

/* 格式化结果样式 */
.formatted-list {
    margin-top: 1rem;
}

.format-row {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
}

.format-label {
    font-weight: 500;
    min-width: 120px;
    color: var(--text-secondary);
}

.format-value {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--primary-color);
    flex: 1;
    margin: 0 1rem;
}

.format-row .copy-btn {
    padding: 0.25rem 0.75rem;
    font-size: 0.9rem;
    background: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.format-row .copy-btn:hover {
    background: var(--background-hover);
}

.format-item.valid {
    border-left: 3px solid var(--success-color);
}

.format-item.invalid {
    border-left: 3px solid var(--error-color);
}

/* 掩码工具样式 */
.masking-list {
    margin-top: 1rem;
}

.masking-item {
    padding: 1rem;
    background-color: var(--background-primary);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.masking-item.valid {
    border-left: 3px solid var(--success-color);
}

.masking-item.invalid {
    border-left: 3px solid var(--error-color);
}

.masking-item .original {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.masking-item .masked {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
}

.masking-item .masked span {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--primary-color);
    flex: 1;
}

/* 提取工具样式 */
.extract-list {
    margin-top: 1rem;
}

.extract-item {
    padding: 1rem;
    background-color: var(--background-primary);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.extract-item.valid {
    border-left: 3px solid var(--success-color);
}

.extract-item.invalid {
    border-left: 3px solid var(--error-color);
}

.extract-item .original {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.extract-item .extracted {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
    margin-top: 0.5rem;
}

.extract-item .country {
    font-weight: 500;
    color: var(--primary-color);
    margin-right: 1rem;
}

.extract-item .number {
    font-family: monospace;
    font-size: 1.1rem;
    color: var(--text-primary);
    flex: 1;
}

/* 通用复制按钮样式 */
.copy-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn:hover {
    background-color: var(--background-secondary);
}

.copy-btn.copied {
    background-color: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

/* 错误消息样式 */
.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.5rem;
    padding: 0.5rem;
    background-color: var(--background-secondary);
    border-radius: var(--radius-sm);
}

/* 无结果样式 */
.no-results {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    background-color: var(--background-secondary);
    border-radius: var(--radius-md);
    margin-top: 1rem;
}

/* 友情链接样式 */
.friend-links {
    margin-bottom: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.friend-links h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.friend-links ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.friend-links li a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.friend-links li a:hover {
    color: var(--primary-color);
    background-color: var(--background-secondary);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .friend-links ul {
        flex-direction: column;
        align-items: center;
    }
}

/* Partner Links Styles */
.partner-links {
    margin-bottom: 2rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.partner-links h3 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-weight: 500;
}

.partner-links ul {
    list-style-type: none !important;
    padding: 0 !important;
    margin: 0;
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    justify-content: center;
    gap: 1.5rem;
}

.partner-links li {
    list-style: none !important;
    padding: 0;
    margin: 0;
}

.partner-links li::before {
    content: none !important;
}

.partner-links li a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem;
    transition: all 0.2s ease;
}

.partner-links li a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .partner-links ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
}

/* FAQ Styles */
.faq-list {
    display: grid;
    gap: 1.5rem;
    margin: 1rem 0;
}

.faq-item {
    background: transparent;
    padding: 0;
    border: none;
}

.faq-item h4 {
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
}

.faq-item h4::before {
    content: "Q:" !important;
    color: var(--primary-color);
    margin-right: 0.5rem;
    font-weight: 600;
    display: inline-block !important;
}

.faq-item p {
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
    padding-left: 1.5rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .faq-list {
        gap: 1.5rem;
    }
    
    .faq-item {
        margin-bottom: 0.5rem;
    }
}

/* 语言切换器样式 */
.language-switcher {
    text-align: right;
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.language-switcher .lang-link {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem;
    transition: all 0.2s ease;
}

.language-switcher .lang-link.active {
    color: var(--primary-color);
    font-weight: 500;
}

.language-switcher .lang-separator {
    color: var(--text-secondary);
    margin: 0 0.5rem;
}

.language-switcher .lang-link:hover:not(.active) {
    color: var(--primary-color);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .language-switcher {
        text-align: center;
    }
}