styles.css

@media (max-width: 768px) {
    .btn-text small { display: none !important; }
}
/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 浅色主题 */
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --warning-color: #f39c12;
    
    --bg-color: #ffffff;
    --surface-color: #f8f9fa;
    --border-color: #e9ecef;
    --text-color: #2c3e50;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    
    --shadow-light: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-medium: 0 4px 8px rgba(0,0,0,0.12);
    --shadow-heavy: 0 8px 16px rgba(0,0,0,0.15);
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    /* 深色主题 */
    --primary-color: #5dade2;
    --secondary-color: #58d68d;
    --accent-color: #ec7063;
    --warning-color: #f4d03f;
    
    --bg-color: #1a1a1a;
    --surface-color: #2d2d2d;
    --border-color: #404040;
    --text-color: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: var(--transition);
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    color: white;
    padding: 1.2rem 1rem; /* 从 2rem 降低到 1.2rem */
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    animation: float 20s linear infinite;
    pointer-events: none;
}

@keyframes float {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.header-content {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.header-main {
    flex: 1;
    text-align: left;
}

.header-main h1 {
    font-size: 2.8rem;
    margin: 0 0 1rem 0;
    font-weight: 700; 
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.version-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.header-tagline {
    font-size: 1.2rem;
    margin: 0 0 1.5rem 0;
    opacity: 0.9; 
    line-height: 1.5;
}

.header-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: .75rem; 
    flex-wrap: wrap;
}

.stat-badge {
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.header-actions { display:flex; gap:.5rem; flex-wrap:nowrap; align-items:center; }

.github-btn { background:#24292e; color:#fff; text-decoration:none; padding:.45rem .6rem; border-radius:10px; display:flex; align-items:center; gap:.5rem; transition:all .3s ease; border:1px solid transparent; min-width:0; white-space:nowrap; }

.github-btn:hover {
    background: #1a1e22;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.2);
}

.github-btn i { font-size:1.2rem; }

.btn-text { display:flex; flex-direction:row; align-items:center; gap:.4rem; }

.btn-text strong { font-size:.92rem; }

.btn-text small { font-size:.78rem; opacity:.8; white-space:nowrap; }

.quick-start-btn, .install-btn {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: .55rem .8rem; 
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    white-space: nowrap;
}
[data-star-count] { margin-left: .25rem; }
.star-count-badge { white-space: nowrap; }

/* GitHub Corner */
.github-corner { position: absolute; top: 0; right: 0; z-index: 50; }
.github-corner svg { opacity:.96; }
[data-theme="dark"] .github-corner svg { fill:#0d1117 !important; color:#fff !important; }
html:not([data-theme="dark"]) .github-corner svg { fill:#fff !important; color:#0d1117 !important; }

/* 官方 GitHub 按钮与徽章在窄屏进行收纳 */
@media (max-width: 768px) {
    .github-button { display: none !important; }
    .star-count-badge { display:none; }
    .github-corner { transform: scale(.8); transform-origin: top right; }
}

/* GitHub Corner 样式已移除 */

.quick-start-btn:hover, .install-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

/* 功能亮点展示 */
.features-highlight {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem; 
    position: relative;
    transition: all 0.3s ease;
}

.features-highlight.collapsed .highlight-content {
    max-height: 0;
    overflow: hidden;
    padding: 0;
}

.highlight-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem; 
    max-width: 1200px;
    margin: 0 auto;
    max-height: 400px; 
    transition: all 0.3s ease;
}

.feature-card {
    background: var(--bg-color);
    padding: 1rem; 
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: .5rem; 
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-card h3 {
    font-size: 1.05rem;
    margin: 0 0 .35rem 0;
    color: var(--text-color);
}

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

.features-toggle {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    border: none;
    padding: .35rem .75rem;
    border-radius: 20px 20px 0 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.features-toggle:hover { background: #2980b9; }

.features-toggle i { transition: transform 0.3s ease; }

.features-highlight.collapsed .features-toggle i { transform: rotate(180deg); }

.theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 0.75rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.theme-toggle:hover { background: rgba(255,255,255,0.3); transform: scale(1.1); }

.lang-toggle {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.45rem 0.75rem;
    margin-left: 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: background .25s, color .25s, border .25s, transform .2s;
}

[data-theme="dark"] .lang-toggle:hover { background: var(--primary-color); }

/* 导航样式 */
.nav {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    box-shadow: var(--shadow-light);
}

.nav-btn {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.5s;
}

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

.nav-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.nav-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-medium);
    transform: translateY(-1px);
}

.nav-btn i {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.nav-btn:hover i {
    transform: scale(1.1);
}

/* 主内容区域 */
.main {
    flex: 1;
    padding: 2rem 1rem;
}

.tool {
    display: none;
    max-width: 1600px;
    max-height: 1600px;
    margin: 0 auto;
}

.tool.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-header h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.tool-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.tool-content {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-medium);
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-group input[type="range"] {
    padding: 0;
    background: transparent;
}

/* 复选框组样式 */
.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

/* 按钮样式 */
.btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

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

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

/* 结果框样式 */
.result-group {
    margin-top: 1.5rem;
}

.result-box {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.result-box input {
    flex: 1;
}

.copy-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.copy-btn:hover {
    background: #27ae60;
    transform: scale(1.05);
}

/* 密码强度指示器 */
.password-strength {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.strength-meter {
    flex: 1;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    transition: var(--transition);
    border-radius: 4px;
}

.strength-bar.weak {
    width: 25%;
    background: var(--accent-color);
}

.strength-bar.medium {
    width: 50%;
    background: var(--warning-color);
}

.strength-bar.strong {
    width: 75%;
    background: var(--secondary-color);
}

.strength-bar.very-strong {
    width: 100%;
    background: var(--secondary-color);
}

/* 新密码生成器样式 */
.password-config-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.config-section {
    margin-bottom: 1.5rem;
}

.config-section:last-child {
    margin-bottom: 0;
}

.config-section h4 {
    margin: 0 0 1rem 0;
    color: var(--text-color);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.length-control {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.length-control label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.length-badge {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
    min-width: 2rem;
    text-align: center;
}

.length-slider {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.length-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.length-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.length-presets {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.preset-btn {
    padding: 0.4rem 0.8rem;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
}

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

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

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.checkbox-card {
    display: block;
    cursor: pointer;
}

.checkbox-card input[type="checkbox"] {
    display: none;
}

.checkbox-content {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 0.5rem;
}

.checkbox-content i {
    font-size: 1.5rem;
    color: var(--text-color-secondary);
}

.checkbox-content span {
    font-weight: 600;
    color: var(--text-color);
}

.checkbox-content small {
    color: var(--text-color-secondary);
    font-size: 0.8rem;
}

.checkbox-card input:checked + .checkbox-content {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
}

.checkbox-card input:checked + .checkbox-content i {
    color: var(--primary-color);
}

.checkbox-card:hover .checkbox-content {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.password-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.btn-generate {
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.password-result-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.result-header h4 {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-color);
}

.result-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    padding: 0.5rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    color: var(--text-color-secondary);
    transition: var(--transition);
}

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

.password-display {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.password-display input {
    flex: 1;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--bg-color);
    color: var(--text-color);
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    letter-spacing: 1px;
}

.password-display input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.password-analysis {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 2rem;
    align-items: center;
}

.strength-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.strength-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.strength-label {
    font-weight: 600;
    color: var(--text-color);
}

.strength-text {
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.875rem;
}

.password-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

.info-label {
    color: var(--text-color-secondary);
}

.info-item span:last-child {
    font-weight: 600;
    color: var(--text-color);
}

/* 颜色选择器样式 */
.color-picker-section {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.color-display {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.color-preview {
    width: 120px;
    height: 120px;
    border-radius: var(--border-radius-lg);
    border: 3px solid var(--border-color);
    box-shadow: var(--shadow-medium);
}

.color-inputs {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.input-group label {
    min-width: 60px;
    font-weight: 500;
}

.input-group input {
    flex: 1;
}

.color-palette {
    margin-top: 2rem;
}

.palette-colors {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 1rem;
    margin: 1rem 0;
}

.palette-color {
    height: 80px;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.palette-color:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-medium);
}

.palette-color::after {
    content: attr(data-color);
    position: absolute;
    bottom: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* 正则表达式测试器样式 */
.regex-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.regex-flags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.regex-flags label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
    cursor: pointer;
}

.regex-results {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1rem;
}

.matches-list {
    max-height: 300px;
    overflow-y: auto;
}

.match-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.75rem;
    margin-bottom: 0.5rem;
}

.match-text {
    font-family: 'Courier New', monospace;
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
}

/* JSON格式化器样式 - 专业版 */
.json-section {
    display: grid;
    /* 左右列进一步加宽 */
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    align-items: start;
}

/* JSON 工具栏 */
.json-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    align-items: center;
}

.json-btn-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    padding: 0.25rem;
    border-radius: 6px;
    background: rgba(0,0,0,0.02);
    transition: all 0.3s ease;
}

.json-btn-group:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* 按钮组标识样式 */
.json-btn-group.input-controls {
    background: rgba(76, 175, 80, 0.08);
    border: 1px solid rgba(76, 175, 80, 0.2);
}

.json-btn-group.input-controls:hover {
    background: rgba(76, 175, 80, 0.12);
    border-color: rgba(76, 175, 80, 0.3);
}

.json-btn-group.process-controls {
    background: rgba(33, 150, 243, 0.08);
    border: 1px solid rgba(33, 150, 243, 0.2);
}

.json-btn-group.process-controls:hover {
    background: rgba(33, 150, 243, 0.12);
    border-color: rgba(33, 150, 243, 0.3);
}

.json-btn-group.output-controls {
    background: rgba(255, 152, 0, 0.08);
    border: 1px solid rgba(255, 152, 0, 0.2);
}

.json-btn-group.output-controls:hover {
    background: rgba(255, 152, 0, 0.12);
    border-color: rgba(255, 152, 0, 0.3);
}

.json-btn-group.view-controls {
    background: rgba(156, 39, 176, 0.08);
    border: 1px solid rgba(156, 39, 176, 0.2);
}

.json-btn-group.view-controls:hover {
    background: rgba(156, 39, 176, 0.12);
    border-color: rgba(156, 39, 176, 0.3);
}

.json-btn {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.2s ease;
}

.json-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(52, 152, 219, 0.2);
}

.json-btn:active {
    transform: translateY(0);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}

.json-btn.primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(52, 152, 219, 0.3);
}

.json-btn.primary:hover {
    background: #2980b9;
    border-color: #2980b9;
    box-shadow: 0 4px 8px rgba(52, 152, 219, 0.4);
}

/* 特殊功能按钮样式 */
.json-btn-paste {
    background: linear-gradient(135deg, #4caf50, #45a049);
    color: white;
    border-color: #4caf50;
    font-weight: 600;
}

.json-btn-paste:hover {
    background: linear-gradient(135deg, #45a049, #3d8b40);
    border-color: #45a049;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(76, 175, 80, 0.3);
}

.json-btn-clear {
    background: linear-gradient(135deg, #f44336, #e53935);
    color: white;
    border-color: #f44336;
    font-weight: 600;
}

.json-btn-clear:hover {
    background: linear-gradient(135deg, #e53935, #d32f2f);
    border-color: #e53935;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(244, 67, 54, 0.3);
}

.json-btn-copy {
    background: linear-gradient(135deg, #ff9800, #f57c00);
    color: white;
    border-color: #ff9800;
    font-weight: 600;
}

.json-btn-copy:hover {
    background: linear-gradient(135deg, #f57c00, #ef6c00);
    border-color: #f57c00;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(255, 152, 0, 0.3);
}

.json-btn.toggle.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

/* 按钮加载状态 */
.json-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.json-btn.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: btn-loading 1s linear infinite;
}

@keyframes btn-loading {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeInSuccess {
    0% { 
        background-color: rgba(40, 167, 69, 0.1);
        transform: scale(1.02);
    }
    50% {
        background-color: rgba(40, 167, 69, 0.2);
    }
    100% { 
        background-color: transparent;
        transform: scale(1);
    }
}

.json-btn i {
    font-size: 0.8rem;
}

/* 搜索栏 */
.json-search-bar {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

[data-theme="dark"] .json-search-bar {
    background: #2d2d2d;
}

.json-search-bar input {
    flex: 1;
    max-width: 300px;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
}

.search-hint {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* JSON 面板 */
.json-panel {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.json-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
}

.json-panel-header h4 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.json-panel-header h4 i {
    color: var(--primary-color);
    font-size: 0.8rem;
}

.json-panel-stats {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.json-editor-wrapper {
    position: relative;
    background: var(--bg-color);
}

/* 改进的文本区域样式 */
#jsonInput, #jsonOutput {
    width: 100%;
    border: none;
    outline: none;
    padding: 1rem;
    font-family: 'Monaco', 'Menlo', 'Consolas', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--bg-color);
    color: var(--text-color);
    resize: vertical;
    /* 更大的编辑区域：最小 320px，优先使用视口高度比例，上限 800px */
    min-height: clamp(320px, 56vh, 800px);
    /* 横向限制，避免在大屏上无限延展 */
    max-width: 100%;
    /* 允许换行并良好断词 */
    white-space: pre-wrap;
    word-break: break-word;
    box-sizing: border-box;
}

#jsonInput:focus, #jsonOutput:focus {
    background: var(--bg-color);
    box-shadow: inset 0 0 0 2px rgba(52, 152, 219, 0.2);
}

/* 改进的树视图样式 */
.json-tree {
    font-family: 'Monaco', 'Menlo', 'Consolas', 'Courier New', monospace;
    background: var(--bg-color);
    border: none;
    padding: 1rem;
    max-height: clamp(420px, 60vh, 880px);
    overflow: auto;
    line-height: 1.6;
    font-size: 0.875rem;
    max-width: 100%;
    margin-inline: auto;
}

.json-tree ul {
    list-style: none;
    margin: 0;
    padding-left: 1.5rem;
    border-left: 1px solid rgba(0,0,0,0.1);
}

[data-theme="dark"] .json-tree ul {
    border-left-color: rgba(255,255,255,0.1);
}

.json-tree li {
    margin: 0.2rem 0;
    position: relative;
}

.json-tree .node-line {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.15rem 0.25rem;
    border-radius: 3px;
    transition: background-color 0.2s;
}

.json-tree .node-line:hover {
    background: rgba(52, 152, 219, 0.1);
}

.json-tree .node-toggle {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 2px;
    background: var(--border-color);
    color: var(--text-color);
    font-size: 10px;
    font-weight: bold;
    transition: all 0.2s;
    user-select: none;
}

.json-tree .node-toggle:hover {
    background: var(--primary-color);
    color: white;
}

.json-tree .collapsed .node-toggle::before {
    content: '+';
}

.json-tree .node-toggle::before {
    content: '−';
}

.json-tree .node-key {
    color: #c92c2c;
    font-weight: 600;
}

.json-tree .node-sep {
    color: var(--text-secondary);
}

.json-tree .node-type {
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.8rem;
}

.json-tree .node-value-string {
    color: #2f9e44;
}

.json-tree .node-value-number {
    color: #1c7ed6;
}

.json-tree .node-value-boolean {
    color: #9d4edd;
}

.json-tree .node-value-null {
    color: #868e96;
    font-style: italic;
}

.json-tree .collapsed > ul {
    display: none;
}

/* JSON 信息状态 */
.json-info {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border-color);
    background: var(--surface-color);
    font-size: 0.875rem;
}

.json-info {
    margin-top: 0.5rem;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}

.json-info.success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--secondary-color);
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.json-info.error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--accent-color);
    border: 1px solid rgba(231, 76, 60, 0.3);
}

/* URL和Base64编码器样式 */
.url-section,
.base64-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* 颜色历史/收藏 */
.color-history-section, .color-favorites-section {
    margin-top: 1.5rem;
}

.color-history {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 0.5rem;
}

.history-color {
    width: 100%;
    padding-top: 100%;
    position: relative;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.history-color:hover { outline: 2px solid var(--primary-color); }

.history-color::after {
    content: attr(title);
    position: absolute;
    bottom: 4px;
    right: 6px;
    font-size: 10px;
    background: rgba(0,0,0,0.4);
    color: #fff;
    padding: 2px 4px;
    border-radius: 3px;
}

.url-controls,
.base64-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 哈希计算器样式 */
.hash-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hash-results {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.hash-result {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.hash-result label {
    font-weight: 600;
    color: var(--primary-color);
}

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

.footer p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* 可访问性增强 */
.skip-link {position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden;z-index:1000;background:#000;color:#fff;padding:.75rem 1rem;border-radius:6px;font-weight:600;}
.skip-link:focus{left:50%;top:12px;transform:translateX(-50%);width:auto;height:auto;outline:3px solid var(--primary-color);}

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

@media (prefers-reduced-motion: reduce){
  * {animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important;scroll-behavior:auto !important;}
}

@media (min-width: 1200px) {
    .tool-content {
        padding: 3rem;
    }

    .json-section {
        gap: 1.5rem;
    }
}

@media (min-width: 1400px) {
    .tool-content {
        padding: 4rem 4.5rem;
    }
    .json-section {
        gap: 2rem;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header {
        padding: 1.5rem 1rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .header-main h1 {
        font-size: 2rem;
        justify-content: center;
    }
    
    .header-tagline {
        font-size: 1rem;
    }
    
    .header-stats {
        justify-content: center;
        gap: 0.5rem;
    }
    
    .stat-badge {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .header-actions {
        justify-content: center;
        flex-direction: column;
        align-items: center;
    }
    
    .github-btn {
        min-width: 250px;
    }
    
    .highlight-content {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .feature-card {
        padding: 1rem;
    }
    
    .feature-icon {
        font-size: 2rem;
        height: 50px;
    }
    
    .header-content h1 {
        font-size: 2rem;
    }
    
    .nav {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 1.5rem;
    }
    
    .nav-btn span {
        display: none;
    }
    
    .tool-content {
        padding: 1rem;
    }
    
    .color-picker-section {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .json-section {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .json-toolbar {
        flex-direction: column;
        gap: 0.75rem;
        padding: 0.75rem;
    }
    
    .json-btn-group {
        justify-content: center;
        flex-wrap: wrap;
        width: 100%;
        margin: 0.25rem 0;
    }
    
    .json-btn-group.input-controls,
    .json-btn-group.output-controls {
        order: 1;
    }
    
    .json-btn-group.process-controls {
        order: 2;
    }
    
    .json-btn-group.view-controls {
        order: 3;
    }
    
    .json-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
        min-width: 80px;
    }
    
    .json-btn i {
        font-size: 0.9rem;
    }
    
    .url-controls,
    .base64-controls {
        flex-direction: column;
    }
    
    .checkbox-group {
        grid-template-columns: 1fr;
    }
    
    /* 密码生成器移动端样式 */
    .checkbox-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .length-presets {
        justify-content: center;
    }
    
    .password-actions {
        flex-direction: column;
    }
    
    .password-analysis {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .password-info {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .info-item {
        flex: 1;
        min-width: 100px;
    }

    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        margin: 0;
    }
    
    .header {
        padding: 1.5rem 1rem;
    }
    
    .header-content h1 {
        font-size: 1.8rem;
    }
    
    .main {
        padding: 1rem;
    }
    
    .tool-content {
        padding: 1rem;
        margin: 0 -0.5rem;
    }
    
    .theme-toggle {
        top: 0.5rem;
        right: 0.5rem;
    }

    /* 移动端：降低 JSON 区域高度，防止撑破屏幕 */
    #jsonInput, #jsonOutput {
        min-height: 200px;
    }

    .json-tree {
        max-height: 260px;
    }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--surface-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* 选择文本样式 */
::selection {
    background: var(--primary-color);
    color: white;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
}

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

/* 时间戳转换器样式 */
.timestamp-section {
    display: grid;
    gap: 2rem;
}

.timestamp-input, .datetime-input {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.timestamp-formats {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.format-grid {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

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

.format-item label {
    min-width: 100px;
    font-weight: 500;
    color: var(--text-secondary);
}

.format-item input {
    flex: 1;
}

/* 二维码生成器样式 */
.qr-section {
    display: grid;
    gap: 2rem;
}

.qr-input {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.qr-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1rem 0;
}

.qr-output {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    text-align: center;
}

.qr-display {
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    background: white;
    border-radius: var(--border-radius);
    border: 2px dashed var(--border-color);
}

.qr-display img {
    max-width: 100%;
    height: auto;
}

.qr-actions {
    margin-top: 1rem;
}

/* 文本差异对比器样式 */
.diff-section {
    display: grid;
    gap: 1.5rem;
}

.diff-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.diff-input {
    background: var(--surface-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

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

.diff-controls {
    text-align: center;
}

.diff-output {
    background: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.diff-stats {
    padding: 1rem;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    font-weight: 500;
}

.diff-result {
    max-height: 500px;
    overflow-y: auto;
}

.diff-content {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.875rem;
    line-height: 1.4;
}

.diff-line {
    display: flex;
    align-items: center;
    padding: 0.25rem 0;
    border-left: 3px solid transparent;
}

.diff-line.unchanged {
    background: var(--bg-color);
}

.diff-line.added {
    background: #d4edda;
    border-left-color: #27ae60;
}

.diff-line.removed {
    background: #f8d7da;
    border-left-color: #e74c3c;
}

[data-theme="dark"] .diff-line.added {
    background: rgba(39, 174, 96, 0.2);
}

[data-theme="dark"] .diff-line.removed {
    background: rgba(231, 76, 60, 0.2);
}

.line-number {
    display: inline-block;
    width: 40px;
    padding: 0 0.5rem;
    text-align: right;
    color: var(--text-muted);
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    user-select: none;
}

/* Share Bar */
.share-bar {
    display: flex;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--card-bg, #ffffff);
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    margin: 1rem 0 1.5rem;
    flex-wrap: wrap;
}

.share-btn {
    background: var(--primary-color,#3498db);
    border: none;
    color: #fff;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: transform .2s, box-shadow .2s, background .2s;
}

.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 14px rgba(0,0,0,0.15);
}

[data-theme="dark"] .share-bar {
    background: #1f2733;
    box-shadow: 0 4px 14px rgba(0,0,0,0.4);
}

[data-theme="dark"] .share-btn {
    background: #3d6fa3;
}

.share-btn:active { transform: scale(.92); }

/* Floating Star CTA */
.star-cta {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 1500;
    background: var(--primary-color);
    color: #fff;
    padding: .75rem 1rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0,0,0,.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .65rem;
    font-size: .9rem;
    font-weight: 600;
    transform: translateY(30px);
    opacity: 0;
    transition: opacity .4s ease, transform .4s ease, background .3s;
}
.star-cta.show { opacity: 1; transform: translateY(0); }
.star-cta.hide { opacity:0; pointer-events:none; }
.star-cta-inner { display:flex; align-items:center; gap:.4rem; }
.star-cta i { color: #ffd166; }
.star-cta:hover { background: #2574a8; }
.star-cta.expanded { padding-right: .75rem; }

.star-cta-actions { display:flex; gap:.4rem; overflow:hidden; max-width:0; transition:max-width .35s ease; }
.star-cta.expanded .star-cta-actions { max-width:200px; }

.cta-btn { background:rgba(255,255,255,.2); backdrop-filter:blur(4px); border:none; color:#fff; width:38px; height:38px; border-radius:12px; display:flex; align-items:center; justify-content:center; cursor:pointer; transition:background .25s, transform .25s; }
.cta-btn:hover { background:rgba(255,255,255,.32); transform:translateY(-3px); }
.cta-btn:active { transform:scale(.9); }

[data-theme="dark"] .star-cta { background:#255e87; }
[data-theme="dark"] .star-cta:hover { background:#1e4e70; }
[data-theme="dark"] .cta-btn { background:rgba(255,255,255,.15); }
[data-theme="dark"] .cta-btn:hover { background:rgba(255,255,255,.28); }

/* GitHub Corner 样式已移除 */

/* Star count badge (header) */
.star-count-badge { display:inline-flex; align-items:center; gap:.35rem; font-weight:600; color: var(--text-color); border:1px solid var(--border-color); padding:.3rem .5rem; border-radius:999px; background: var(--bg-color); }
.star-count-badge i { color:#ffd166; }

/* Star CTA 内计数 */
.star-cta-count { font-weight:700; padding:.1rem .45rem; background: rgba(255,255,255,.15); border-radius: 999px; }

/* 性能优化：延迟渲染屏外工具，降低首屏样式/布局/绘制成本 */
.tool { content-visibility: auto; contain-intrinsic-size: 800px; }

/* CSS 单位转换器 */
.css-unit-table {
    margin-top: 1.25rem;
    display: grid;
    grid-template-columns: repeat(auto-fill,minmax(140px,1fr));
    gap: .75rem;
}

.css-unit-table .unit-item {
    background: var(--surface-color);
    padding: .75rem .6rem;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.06);
    font-size: .8rem;
    display: flex;
    flex-direction: column;
    gap: .35rem;
    position: relative;
    overflow: hidden;
}

.css-unit-table .unit-item h4 {
    margin: 0;
    font-size: .75rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: .5px;
    text-transform: uppercase;
}

.css-unit-table .unit-item code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: .85rem;
    background: rgba(0,0,0,0.05);
    padding: 2px 4px;
    border-radius: 4px;
    word-break: break-all;
}

[data-theme="dark"] .css-unit-table .unit-item code {
    background: rgba(255,255,255,0.08);
}
.line-content {
    padding: 0 1rem;
    white-space: pre-wrap;
    word-break: break-all;
    flex: 1;
}

/* 响应式设计 - 新工具 */
@media (max-width: 768px) {
    .qr-options {
        grid-template-columns: 1fr;
    }
    
    .diff-inputs {
        grid-template-columns: 1fr;
    }
    
    .format-grid {
        gap: 0.5rem;
    }
    
    .format-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .format-item label {
        min-width: auto;
        margin-bottom: 0.25rem;
    }
    
    .diff-line {
        font-size: 0.75rem;
    }
    
    .line-number {
        width: 30px;
        padding: 0 0.25rem;
    }
    
    .line-content {
        padding: 0 0.5rem;
    }
}

/* PWA 安装横幅样式 */
#install-banner, #update-banner {
    position: fixed;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    box-shadow: var(--shadow-heavy);
    z-index: 1000;
    min-width: 300px;
    max-width: 90vw;
    transition: top 0.3s ease;
}

#install-banner.show, #update-banner.show {
    top: 0;
}

.install-content, .update-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.install-text, .update-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.install-actions, .update-actions {
    display: flex;
    gap: 0.5rem;
}

.install-actions .btn, .update-actions .btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    border: 1px solid rgba(255,255,255,0.3);
}

.install-actions .btn.primary, .update-actions .btn.primary {
    background: rgba(255,255,255,0.2);
    color: white;
}

.install-actions .btn.secondary, .update-actions .btn.secondary {
    background: transparent;
    color: rgba(255,255,255,0.9);
}

.install-actions .btn:hover, .update-actions .btn:hover {
    background: rgba(255,255,255,0.3);
}

/* JSON Tree View */
.json-tree {font-family: ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--bg-color); border:1px solid var(--border-color); border-radius:6px; padding:.75rem; max-height: clamp(420px, 60vh, 880px); overflow:auto; line-height:1.4; font-size:.8rem; max-width: clamp(720px, 80vw, 1200px); margin-inline: auto;}
.json-tree ul{list-style:none;margin:0;padding-left:1rem;}
.json-tree li{margin:.15rem 0;position:relative;}
.json-tree .node-key{color:#c92c2c;font-weight:600;}
.json-tree .node-value-string{color:#2f9e44;}
.json-tree .node-value-number{color:#1c7ed6;}
.json-tree .node-value-boolean{color:#9d4edd;}
.json-tree .node-toggle{cursor:pointer;display:inline-flex;align-items:center;gap:.25rem;color:var(--text-secondary);}
.json-tree .collapsed>ul{display:none;}
.json-view-toggle {display:flex; gap:.5rem; margin-top:.75rem;}

/* Usage Stats Modal */
.modal{position:fixed;inset:0;display:none;align-items:center;justify-content:center;z-index:3000;}
.modal[aria-hidden='false']{display:flex;}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.45);backdrop-filter:blur(3px);}
.modal-content{position:relative;background:var(--surface-color);border:1px solid var(--border-color);border-radius:14px;max-width:760px;width:90%;max-height:85vh;display:flex;flex-direction:column;box-shadow:0 8px 32px -4px rgba(0,0,0,.4);}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--border-color);} 
.modal-body{padding:1rem 1.25rem;overflow:auto;}
.modal-footer{padding:.8rem 1.25rem;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end;gap:.5rem;}
.modal-close{background:transparent;border:none;color:var(--text-secondary);cursor:pointer;font-size:1.1rem;}
.modal-close:hover{color:var(--text-color);} 
.usage-table-wrapper{overflow:auto;margin-top:.5rem;}
.usage-table{width:100%;border-collapse:collapse;font-size:.8rem;}
.usage-table th,.usage-table td{padding:.5rem .6rem;border-bottom:1px solid var(--border-color);text-align:left;white-space:nowrap;}
.usage-table th{background:var(--surface-color);position:sticky;top:0;z-index:1;}
.usage-table tbody tr:hover{background:rgba(0,0,0,.04);} 
[data-theme='dark'] .usage-table tbody tr:hover{background:rgba(255,255,255,.06);} 
#resetUsageBtn{background:var(--accent-color);}#resetUsageBtn:hover{filter:brightness(1.1);} 

/* 触发按钮（可放在页脚或导航后续加入） */
.usage-trigger-btn{position:fixed;left:18px;bottom:18px;z-index:1499;background:var(--surface-color);color:var(--text-secondary);border:1px solid var(--border-color);padding:.6rem .9rem;border-radius:10px;font-size:.75rem;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:.4rem;box-shadow:0 4px 16px -4px rgba(0,0,0,.25);transition:.25s;} 
.usage-trigger-btn:hover{color:var(--text-color);transform:translateY(-2px);} 
[data-theme='dark'] .usage-trigger-btn{background:#1f2733;}

/* 快速开始模态框 */
.quick-start-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.quick-start-modal.show {
    opacity: 1;
    visibility: visible;
}

.quick-start-modal .modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.quick-start-modal .modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    background: var(--bg-color);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.quick-start-modal.show .modal-content {
    transform: translate(-50%, -50%) scale(1);
}

.quick-start-modal .modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.quick-start-modal .modal-header h3 {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.quick-start-modal .modal-header h3 i {
    margin-right: 12px;
    color: #fff;
}

.close-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 8px;
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.quick-start-modal .modal-body {
    padding: 32px;
}

.quick-start-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.quick-start-item {
    padding: 24px;
    border-radius: 16px;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.quick-start-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(52, 152, 219, 0.2);
}

.qs-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.quick-start-item h4 {
    margin: 0 0 12px 0;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
}

.quick-start-item p {
    margin: 0;
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.5;
}

.quick-start-tips {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(155, 89, 182, 0.1));
    border-radius: 16px;
    padding: 24px;
    border-left: 4px solid var(--primary-color);
}

.quick-start-tips h4 {
    margin: 0 0 16px 0;
    color: var(--primary-color);
    font-size: 1.1rem;
    font-weight: 600;
}

.quick-start-tips h4 i {
    margin-right: 8px;
}

.quick-start-tips ul {
    margin: 0;
    padding-left: 20px;
    color: var(--text-light);
}

.quick-start-tips li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.quick-start-tips li:last-child {
    margin-bottom: 0;
}

/* 功能亮点折叠状态 */
#featuresHighlight.collapsed .features-grid {
    display: none;
}

#featuresHighlight.collapsed {
    margin-bottom: 20px;
}

/* 通知系统 */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 12px;
    color: white;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    z-index: 10001;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
}

.notification.error {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.notification.info {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

/* 快速开始模态框响应式 */
@media (max-width: 768px) {
    .quick-start-modal .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .quick-start-modal .modal-header,
    .quick-start-modal .modal-body {
        padding: 20px;
    }
    
    .quick-start-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .quick-start-item {
        padding: 20px;
    }
    
    .qs-icon {
        font-size: 2.5rem;
    }
}

/* 正则表达式增强样式 */
.match-item.enhanced {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 12px;
    transition: all 0.2s ease;
}

.match-item.enhanced:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.1);
}

.match-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.match-text {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(155, 89, 182, 0.1));
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

.match-details {
    display: flex;
    gap: 16px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.match-position,
.match-length {
    background: var(--surface-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
}

.match-groups {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.group {
    background: rgba(155, 89, 182, 0.1);
    color: var(--secondary-color);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-family: monospace;
}

.match-item.error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.3);
    color: #e74c3c;
    padding: 12px;
    border-radius: 6px;
    font-weight: 500;
}

/* 正则高亮显示 */
#regexHighlight {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
    font-family: 'Courier New', monospace;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 300px;
    overflow-y: auto;
}

.highlight-match {
    background: linear-gradient(135deg, #f39c12, #e67e22);
    color: white;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 600;
    position: relative;
    cursor: pointer;
}

.highlight-match:hover {
    filter: brightness(1.1);
}

.highlight-match::after {
    content: attr(data-match);
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    background: #2c3e50;
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: normal;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.highlight-match:hover::after {
    opacity: 1;
}

/* 正则表达式分析 */
.regex-breakdown {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05), rgba(155, 89, 182, 0.05));
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
}

.regex-breakdown h4 {
    margin: 0 0 12px 0;
    color: var(--primary-color);
    font-size: 1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.regex-rule {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    padding: 6px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.regex-rule:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.regex-rule code {
    background: var(--surface-color);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--primary-color);
    margin-right: 12px;
    min-width: 60px;
    text-align: center;
}

/* 性能信息 */
.performance-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    margin: 8px 0;
}

.performance-info.good {
    background: rgba(39, 174, 96, 0.1);
    color: #27ae60;
}

.performance-info.warning {
    background: rgba(243, 156, 18, 0.1);
    color: #f39c12;
}

.performance-info.bad {
    background: rgba(231, 76, 60, 0.1);
    color: #e74c3c;
}

/* 正则模板模态框 */
.regex-templates-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.regex-templates-modal.show {
    opacity: 1;
    visibility: visible;
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
    max-height: 60vh;
    overflow-y: auto;
}

.template-item {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.template-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.15);
}

.template-title {
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.template-pattern {
    background: var(--surface-color);
    padding: 8px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--primary-color);
    margin-bottom: 8px;
    word-break: break-all;
    border: 1px solid var(--border-color);
}

.template-example {
    color: var(--text-light);
    font-size: 0.9rem;
    font-style: italic;
}

/* 模板模态框响应式 */
@media (max-width: 768px) {
    .templates-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .template-item {
        padding: 12px;
    }
    
    .template-pattern {
        font-size: 0.8rem;
        padding: 6px;
    }
}

/* 统一工具界面系统 */
.tool-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.tool-header-unified {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 24px;
    border-radius: 16px 16px 0 0;
    margin-bottom: 0;
    position: relative;
    overflow: hidden;
}

.tool-header-unified::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(30px, -30px);
}

.tool-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 0 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.tool-title i {
    font-size: 1.6rem;
    opacity: 0.9;
}

.tool-subtitle {
    font-size: 1rem;
    opacity: 0.9;
    margin: 0;
    font-weight: 300;
}

.tool-content-unified {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0 0 16px 16px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* 统一表单组件 */
.form-grid {
    display: grid;
    gap: 24px;
    margin-bottom: 24px;
}

.form-grid.two-columns {
    grid-template-columns: 1fr 1fr;
}

.form-grid.three-columns {
    grid-template-columns: 1fr 1fr 1fr;
}

.form-section {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    transition: all 0.3s ease;
}

.form-section:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.1);
}

.form-section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 16px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-section-title i {
    color: var(--primary-color);
}

.input-group-unified {
    margin-bottom: 16px;
}

.input-group-unified:last-child {
    margin-bottom: 0;
}

.input-label {
    display: block;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.input-field {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    font-family: inherit;
}

.input-field:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.input-field.monospace {
    font-family: 'Courier New', monospace;
}

.textarea-field {
    min-height: 120px;
    resize: vertical;
}

.textarea-field.large {
    min-height: 200px;
}

/* 统一按钮系统 */
.btn-group-unified {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    margin: 20px 0;
}

.btn-unified {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    border: 2px solid transparent;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.05);
}

.btn-success {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(39, 174, 96, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, #f39c12, #e67e22);
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(231, 76, 60, 0.3);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-large {
    padding: 16px 28px;
    font-size: 1.1rem;
}

.btn-icon-only {
    padding: 12px;
    width: 44px;
    height: 44px;
    justify-content: center;
}

/* 统一结果显示区域 */
.result-section {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.result-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.result-content {
    position: relative;
}

.result-display {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 300px;
    overflow-y: auto;
    line-height: 1.5;
}

.result-stats {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--text-light);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-value {
    font-weight: 600;
    color: var(--primary-color);
}

/* 统一选项卡系统 */
.tabs-unified {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
    overflow-x: auto;
}

.tab-unified {
    padding: 12px 20px;
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    white-space: nowrap;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
}

.tab-unified:hover {
    color: var(--text-color);
    background: rgba(52, 152, 219, 0.05);
}

.tab-unified.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background: rgba(52, 152, 219, 0.1);
}

.tab-content {
    display: none;
}

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

/* 统一复选框和单选框 */
.checkbox-group,
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 12px 0;
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 6px;
    transition: background 0.2s ease;
}

.checkbox-item:hover,
.radio-item:hover {
    background: rgba(52, 152, 219, 0.05);
}

.checkbox-item input[type="checkbox"],
.radio-item input[type="radio"] {
    margin: 0;
    cursor: pointer;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .tool-container {
        padding: 12px;
    }
    
    .tool-header-unified {
        padding: 16px;
    }
    
    .tool-title {
        font-size: 1.4rem;
    }
    
    .tool-content-unified {
        padding: 20px;
    }
    
    .form-grid.two-columns,
    .form-grid.three-columns {
        grid-template-columns: 1fr;
    }
    
    .btn-group-unified {
        justify-content: center;
    }
    
    .tabs-unified {
        justify-content: flex-start;
    }
    
    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}