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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f43f5e;
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0;
}

.container > *:not(header):not(footer):not(.hero-section) {
    max-width: 1400px;
    margin: 0 auto;
    padding: 10px 20px;
    margin-top: 20px;
}

/* 头部样式 */
header {
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-primary);
    padding: 16px 40px;
    border-radius: 0;
    margin-bottom: 0;
    box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.3s;
}

.logo:hover {
    opacity: 0.8;
}

.header-nav {
    display: flex;
    gap: 8px;
}

/* 下拉菜单容器 */
.nav-dropdown {
    position: relative;
}

.nav-link {
    padding: 10px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius);
    transition: color 0.2s ease, background 0.2s ease;
    position: relative;
    display: block;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-link.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.15);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 50%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 2px;
}

/* SBTI 导航按钮 */
.sbti-nav-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: #fff !important;
    padding: 8px 18px !important;
    border-radius: 20px !important;
    font-size: 13px !important;
    font-weight: 700 !important;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease !important;
    white-space: nowrap;
}
.sbti-nav-btn:hover {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%) !important;
    color: #fff !important;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.45);
    transform: translateY(-1px);
}

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 500px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 16px;
    margin-top: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 1000;
    border: 1px solid var(--border);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.2s ease, color 0.2s ease;
    white-space: nowrap;
    border-radius: var(--radius);
}

.dropdown-item:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
    color: var(--primary);
}

.logo-icon {
    font-size: 32px;
    filter: drop-shadow(0 2px 4px rgba(99, 102, 241, 0.3));
}

.logo-text {
    font-size: 26px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.language-select {
    min-width: 160px;
    padding: 10px 14px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    background: white;
    cursor: pointer;
    transition: border-color 0.2s ease;
    color: var(--text-secondary);
}

.language-select:hover {
    border-color: var(--primary-light);
}

.language-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.header-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.header-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.subtitle {
    font-size: 14px;
    color: #6b7280;
    text-align: center;
    margin: 0;
}



.tab-button {
    padding: 12px 30px;
    background: white;
    border: 2px solid #e4e7ed;
    border-radius: 6px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: #606266;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.tab-button:hover {
    border-color: #667eea;
    color: #667eea;
}

.tab-button.active {
    background: #667eea;
    border-color: #667eea;
    color: white;
}

/* 首页工具菜单 */
.home-tools {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 80px;
    text-align: center;
}

/* 首屏英雄区域 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    padding: 100px 20px 140px;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%23ffffff' fill-opacity='0.1' d='M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,154.7C960,171,1056,181,1152,165.3C1248,149,1344,107,1392,85.3L1440,64L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E") no-repeat bottom;
    background-size: cover;
    opacity: 0.3;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 80px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 120'%3E%3Cpath fill='%23f8fafc' d='M0,64L60,69.3C120,75,240,85,360,90.7C480,96,600,96,720,85.3C840,75,960,53,1080,48C1200,43,1320,53,1380,58.7L1440,64L1440,120L1380,120C1320,120,1200,120,1080,120C960,120,840,120,720,120C600,120,480,120,360,120C240,120,120,120,60,120L0,120Z'%3E%3C/path%3E%3C/svg%3E") no-repeat bottom;
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.home-title {
    font-size: 56px;
    font-weight: 800;
    color: white;
    margin-bottom: 24px;
    letter-spacing: -1px;
    line-height: 1.1;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.home-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0;
    line-height: 1.8;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 工具分类 */
.tool-category {
    margin-bottom: 80px;
}

.category-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 40px;
    text-align: left;
    padding-bottom: 16px;
    border-bottom: none;
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.category-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 2px;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 48px;
    margin-bottom: 48px;
}

.tool-card {
    background: linear-gradient(145deg, #f0f4ff 0%, #e8ecff 100%);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    box-shadow: var(--shadow);
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
    border: 1px solid rgba(99, 102, 241, 0.15);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    will-change: transform;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.3);
    background: white;
}

.tool-card-icon {
    font-size: 42px;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.tool-card h2,
.tool-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.3px;
}

.tool-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    flex-grow: 1;
}

.tool-card-arrow {
    font-size: 20px;
    color: var(--primary);
    font-weight: 700;
    transition: transform 0.2s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-card:hover .tool-card-arrow {
    transform: translateX(6px);
}

/* 工具区域 */
.tool-section {
    display: none;
    background: white;
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: fadeIn 0.3s ease;
    max-width: 1400px;
    margin: 40px auto 20px;
    border: 1px solid var(--border);
}

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

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

.tool-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 32px;
    padding-top: 10px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--border);
}

.tool-header-center {
}

.tool-header h1,
.tool-header h2 {
    font-size: 22px;
    color: var(--text-primary);
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.3px;
}

/* 按钮组 */
.button-group {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-sm);
}

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

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

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.btn-secondary {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-danger {
    background: linear-gradient(135deg, #f43f5e 0%, #e11d48 100%);
    color: white;
}

.btn-copy {
    padding: 6px 14px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    margin-left: 10px;
    transition: background 0.2s ease, color 0.2s ease;
}

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

/* 编辑器容器 */
.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.editor-section {
    display: flex;
    flex-direction: column;
}

.editor-section label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

textarea {
    width: 100%;
    height: 450px;
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.7;
    resize: vertical;
    transition: border-color 0.2s ease;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

textarea::placeholder {
    color: var(--text-muted);
}

/* 错误提示 */
.error-message {
    margin-top: 16px;
    padding: 14px 18px;
    background: linear-gradient(135deg, rgba(244, 63, 94, 0.1) 0%, rgba(225, 29, 72, 0.1) 100%);
    border: 1px solid rgba(244, 63, 94, 0.3);
    border-radius: var(--radius);
    color: #e11d48;
    font-size: 14px;
    font-weight: 500;
    display: none;
}

.error-message:not(:empty) {
    display: block;
}

/* 时间戳工具样式 */
.timezone-selector {
    margin-bottom: 28px;
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1) 0%, rgba(245, 158, 11, 0.1) 100%);
    border-radius: var(--radius);
    border: 1px solid rgba(251, 191, 36, 0.3);
    display: flex;
    align-items: center;
    gap: 16px;
}

.timezone-selector label {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.timezone-selector select {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    background: white;
    cursor: pointer;
    transition: border-color 0.2s ease;
    font-weight: 500;
}

.timezone-selector select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.current-time-section,
.converter-section {
    margin-bottom: 32px;
    padding: 28px;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.8) 0%, rgba(241, 245, 249, 0.8) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.current-time-section h3,
.converter-section h3 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 700;
}

.time-display {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.time-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.time-label {
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 140px;
    font-size: 14px;
}

.time-value {
    flex: 1;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
}

/* 输入组 */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-group input[type="text"],
.input-group input[type="datetime-local"] {
    padding: 14px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s ease;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    font-weight: 500;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.radio-group {
    display: flex;
    gap: 24px;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.radio-group label:hover {
    color: var(--primary);
}

.radio-group input[type="radio"] {
    cursor: pointer;
    accent-color: var(--primary);
}

/* 结果框 */
.result-box {
    margin-top: 16px;
    padding: 18px;
    background: white;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    min-height: 60px;
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
    color: var(--text-primary);
    line-height: 1.8;
}

.result-box:empty::before {
    content: "转换结果将显示在这里";
    color: var(--text-muted);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

/* 页脚 */
footer {
    margin-top: 40px;
    padding: 48px 0;
    text-align: center;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    width: 100%;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
}

footer .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

footer .footer-copyright {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 500;
}

footer .footer-copyright span {
    color: rgba(255, 255, 255, 0.9);
}

footer .footer-sitemap {
    margin-top: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

footer .footer-sitemap a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.2s ease, background 0.2s ease;
    font-size: 13px;
    font-weight: 500;
    padding: 4px 8px;
    border-radius: 6px;
}

footer .footer-sitemap a:hover {
    color: rgba(255, 255, 255, 1);
    background: rgba(255, 255, 255, 0.1);
}

footer .footer-separator {
    color: rgba(255, 255, 255, 0.3);
}

/* 响应式设计 */
@media (max-width: 1400px) {
    .tool-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1200px) {
    .editor-container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 1024px) {
    .editor-container {
        grid-template-columns: 1fr;
    }

    .tool-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .button-group {
        width: 100%;
        flex-wrap: wrap;
    }
}

@media (max-width: 1024px) {
    .header-left {
        gap: 20px;
    }

    .nav-link {
        padding: 6px 12px;
        font-size: 13px;
    }

    footer {
        padding: 30px 0;
    }
}

@media (max-width: 768px) {
    .container > *:not(header):not(footer) {
        padding: 0 10px;
    }

    header {
        padding: 15px 20px;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .header-left {
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .header-nav {
        width: 100%;
        justify-content: flex-start;
    }

    .nav-link {
        flex: 1;
        text-align: center;
    }

    .header-right {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .language-select {
        width: 100%;
    }

    .header-link {
        justify-content: center;
    }

    .logo-text {
        font-size: 20px;
    }

    footer {
        padding: 25px 0;
        font-size: 12px;
    }

    .home-tools {
        margin: 40px auto;
    }

    .hero-section {
        padding: 60px 20px 100px;
        margin-bottom: 40px;
    }

    .hero-section::after {
        height: 50px;
    }

    .home-title {
        font-size: 32px;
    }

    .home-subtitle {
        font-size: 16px;
    }

    .tool-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .tool-card {
        padding: 24px 20px;
    }

    .tool-card-icon {
        font-size: 36px;
    }

    .tool-section {
        padding: 20px;
        margin-top: 20px;
    }

    .timezone-selector {
        flex-direction: column;
        align-items: flex-start;
    }

    .timezone-selector select {
        width: 100%;
    }
}

/* Markdown 预览样式 */
.markdown-preview {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 20px;
    min-height: 400px;
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.8;
}

.markdown-preview h1,
.markdown-preview h2,
.markdown-preview h3,
.markdown-preview h4,
.markdown-preview h5,
.markdown-preview h6 {
    margin-top: 20px;
    margin-bottom: 10px;
    font-weight: 600;
    color: #333;
}

.markdown-preview h1 {
    font-size: 28px;
    border-bottom: 2px solid #e5e7eb;
    padding-bottom: 10px;
}

.markdown-preview h2 {
    font-size: 24px;
}

.markdown-preview h3 {
    font-size: 20px;
}

.markdown-preview p {
    margin-bottom: 12px;
}

.markdown-preview ul,
.markdown-preview ol {
    margin-left: 20px;
    margin-bottom: 12px;
}

.markdown-preview li {
    margin-bottom: 6px;
}

.markdown-preview code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #d63384;
}

.markdown-preview pre {
    background: #f5f5f5;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    padding: 12px;
    overflow-x: auto;
    margin-bottom: 12px;
}

.markdown-preview pre code {
    background: none;
    padding: 0;
    color: #333;
}

.markdown-preview blockquote {
    border-left: 4px solid #3b82f6;
    padding-left: 12px;
    margin-left: 0;
    margin-bottom: 12px;
    color: #666;
    font-style: italic;
}

.markdown-preview table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 12px;
}

.markdown-preview table th,
.markdown-preview table td {
    border: 1px solid #e5e7eb;
    padding: 8px 12px;
    text-align: left;
}

.markdown-preview table th {
    background: #f5f5f5;
    font-weight: 600;
}

.markdown-preview a {
    color: #3b82f6;
    text-decoration: none;
}

.markdown-preview a:hover {
    text-decoration: underline;
}

.markdown-preview img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 12px 0;
}

/* Crontab 编写器样式 */
.crontab-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    background: white;
    border-radius: 8px;
    margin-bottom: 20px;
}

.crontab-form-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.crontab-form-section h3 {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0 0 15px 0;
}

.form-fields-row {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: #606266;
    white-space: nowrap;
}

.input-group {
    display: flex;
    gap: 5px;
    align-items: center;
}

.input-group select,
.input-group input {
    padding: 6px 10px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-size: 13px;
    width: auto;
    max-width: 140px;
}

.input-group select:focus,
.input-group input:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.crontab-result-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.crontab-expression-box {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.crontab-expression-box label {
    font-size: 14px;
    font-weight: 600;
    color: #606266;
}

.expression-display {
    display: flex;
    gap: 10px;
}

.expression-display input {
    flex: 1;
    padding: 12px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-size: 14px;
    font-family: 'Courier New', monospace;
    background: #f5f7fa;
}

.expression-display input:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.btn-small {
    padding: 10px 16px;
    font-size: 13px;
    white-space: nowrap;
}

.crontab-preview-box,
.crontab-examples-box {
    background: #f5f7fa;
    border-radius: 6px;
    padding: 15px;
}

.crontab-preview-box h3,
.crontab-examples-box h3 {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin: 0 0 12px 0;
}

.next-runs-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.next-runs-list li {
    background: white;
    padding: 10px 12px;
    border-radius: 4px;
    margin-bottom: 8px;
    font-size: 13px;
    border-left: 3px solid #67c23a;
}

.next-runs-list li:last-child {
    margin-bottom: 0;
}

.examples-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.example-btn {
    padding: 10px 12px;
    background: white;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    text-align: left;
}

.example-btn:hover {
    background: #409eff;
    color: white;
    border-color: #409eff;
}

.error-message {
    color: #f56c6c;
    padding: 10px 12px;
    background: #fef0f0;
    border-left: 3px solid #f56c6c;
    border-radius: 4px;
    display: none;
}

.error-message:not(:empty) {
    display: block;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .crontab-container {
        padding: 20px;
    }

    .form-fields-row {
        flex-direction: column;
        gap: 15px;
    }

    .form-group {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }

    .form-group label {
        width: 100%;
    }

    .input-group {
        width: 100%;
    }

    .input-group select,
    .input-group input {
        flex: 1;
        max-width: none;
    }
}

/* URL 编解码工具样式 */
.url-encoder-container {
    background: white;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.url-input-section,
.url-result-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.url-input-section label,
.url-result-section label {
    font-size: 14px;
    font-weight: 600;
    color: #606266;
}

.url-input-section input,
.url-result-section input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-size: 14px;
    font-family: 'Courier New', monospace;
}

.url-input-section input:focus,
.url-result-section input:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.url-result-section input[readonly] {
    background: #f5f7fa;
    color: #606266;
}

.url-options-section {
    display: flex;
    gap: 15px;
    align-items: center;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: #606266;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
}

.url-button-section {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.url-button-section .btn {
    padding: 10px 16px;
    font-size: 14px;
}

.url-mapping-section {
    background: white;
    border-radius: 8px;
    margin-bottom: 20px;
}

.url-mapping-section h3 {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin: 0 0 15px 0;
}

.url-mapping-table-wrapper {
    overflow-x: auto;
}

.url-mapping-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 6px;
    overflow: hidden;
}

.url-mapping-table th {
    background: #409eff;
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
}

.url-mapping-table td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    font-size: 14px;
    font-family: 'Courier New', monospace;
}

.url-mapping-table tr:last-child td {
    border-bottom: none;
}

.url-mapping-table tr:nth-child(even) {
    background: #f9f9f9;
}

.url-mapping-table tr:hover {
    background: #f0f9ff;
}

/* URL 编解码响应式设计 */
@media (max-width: 768px) {
    .url-encoder-container {
        padding: 20px;
    }

    .url-button-section {
        flex-direction: column;
    }

    .url-button-section .btn {
        width: 100%;
    }
}


/* 导航下拉菜单响应式设计 */
@media (max-width: 1024px) {
    .header-nav {
        display: none;
    }

    .header-left {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    header {
        padding: 15px 20px;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
    }

    .header-left {
        width: 100%;
        justify-content: center;
    }

    .header-right {
        width: 100%;
        justify-content: center;
    }

    .language-select {
        min-width: 140px;
    }

    .tool-category {
        margin-bottom: 40px;
    }

    .category-title {
        font-size: 24px;
        width: 100%;
        text-align: center;
    }

    .tool-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* 加密工具特殊样式 */
#encryption-tool .editor-container {
    grid-template-columns: 1fr;
}

#encryption-tool textarea {
    height: 100px;
}

#encryption-tool input[type="password"],
#encryption-tool input[type="text"] {
    width: 100%;
    padding: 10px 15px;
    border: 2px solid #dcdfe6;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

#encryption-tool input[type="password"]:focus,
#encryption-tool input[type="text"]:focus {
    outline: none;
    border-color: #409eff;
}

/* Base64 工具特殊样式 */
#base64-tool .editor-container {
    grid-template-columns: 1fr;
}

#base64-tool textarea {
    height: 100px;
}

#base64-tool input[type="file"] {
    padding: 8px;
    border: 2px solid #dcdfe6;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
}

/* MD5 工具特殊样式 */
#md5-tool .editor-container {
    grid-template-columns: 1fr;
}

#md5-tool textarea {
    height: 100px;
}

#md5-tool input[type="checkbox"] {
    cursor: pointer;
}

/* JWT 工具特殊样式 */
.jwt-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

.jwt-panel {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    background-color: #fafafa;
}

.jwt-panel-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #409eff;
}

.jwt-panel-header h3 {
    margin: 0;
    font-size: 16px;
    color: #333;
    font-weight: 600;
}

.jwt-form-group {
    margin-bottom: 15px;
}

.jwt-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #606266;
    font-size: 14px;
}

.jwt-textarea {
    width: 100%;
    height: 100px;
    padding: 10px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    resize: vertical;
    box-sizing: border-box;
}

.jwt-textarea:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.jwt-textarea-small {
    width: 100%;
    height: 60px;
    padding: 10px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    resize: vertical;
    box-sizing: border-box;
}

.jwt-textarea-small:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.jwt-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
}

.jwt-input:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.jwt-radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.jwt-radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: normal;
    color: #606266;
}

.jwt-radio-label input[type="radio"] {
    cursor: pointer;
    width: 16px;
    height: 16px;
}

.success-message {
    color: #67c23a;
    padding: 10px 15px;
    margin-top: 10px;
    border-radius: 4px;
    background-color: #f0f9ff;
    display: none;
}

.success-message:not(:empty) {
    display: block;
}

/* RSA 工具特殊样式 */
.rsa-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 20px;
}

.rsa-panel {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    background-color: #fafafa;
}

.rsa-panel-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #409eff;
}

.rsa-panel-header h3 {
    margin: 0;
    font-size: 16px;
    color: #333;
    font-weight: 600;
}

.rsa-form-group {
    margin-bottom: 15px;
}

.rsa-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #606266;
    font-size: 14px;
}

.rsa-textarea {
    width: 100%;
    height: 200px;
    padding: 10px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    resize: vertical;
    box-sizing: border-box;
}

.rsa-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    font-size: 14px;
    box-sizing: border-box;
}

.rsa-radio-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.rsa-radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: normal;
    color: #606266;
}

/* SQL 验证器样式 */
.db-select {
    padding: 10px 16px;
    border: 1px solid #dcdfe6;
    border-radius: 6px;
    font-size: 14px;
    background: white;
    color: #606266;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.db-select:hover {
    border-color: #409eff;
}

.db-select:focus {
    outline: none;
    border-color: #409eff;
    box-shadow: 0 0 0 2px rgba(64, 158, 255, 0.2);
}

.validation-result {
    margin-top: 20px;
    padding: 15px;
    border-radius: 6px;
    display: none;
}

.validation-result.show {
    display: block;
}

.validation-result.success {
    background: #f0f9ff;
    border-left: 4px solid #67c23a;
    color: #606266;
}

.validation-result.error {
    background: #fef0f0;
    border-left: 4px solid #f56c6c;
    color: #606266;
}

.validation-result.warning {
    background: #fdf6ec;
    border-left: 4px solid #e6a23c;
    color: #606266;
}

.validation-result h3 {
    margin: 0 0 10px 0;
    font-size: 16px;
    font-weight: 600;
}

.validation-result ul {
    margin: 0;
    padding-left: 20px;
}

.validation-result li {
    margin: 5px 0;
    font-size: 14px;
}

/* ==========================================
   页面内容样式 (Privacy Policy, Contact Us, Sponsorship)
   ========================================== */

.page-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e5e7eb;
}

.page-header h1 {
    font-size: 32px;
    color: #1f2937;
    margin-bottom: 10px;
}

.page-header p {
    color: #6b7280;
    font-size: 14px;
}

.page-section {
    margin-bottom: 30px;
}

.page-section h2 {
    font-size: 20px;
    color: #1f2937;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f3f4f6;
}

.page-section p {
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 10px;
}

.page-section a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s;
}

.page-section a:hover {
    color: #5568d3;
    text-decoration: underline;
}

/* 联系我们页面 */
.contact-info-section {
    padding: 20px;
    background: #f9fafb;
    border-radius: 8px;
    margin-top: 30px;
}

.contact-info-item {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #e5e7eb;
}

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

.contact-info-item h3 {
    font-size: 16px;
    color: #1f2937;
    margin-bottom: 8px;
}

.contact-info-item p {
    color: #6b7280;
    font-size: 14px;
}

.contact-info-item a {
    color: #667eea;
    text-decoration: none;
}

.contact-info-item a:hover {
    text-decoration: underline;
}

/* 赞助页面 */
.sponsorship-container {
    margin-top: 30px;
}

.sponsorship-donate {
    background: #f0f4ff;
    padding: 40px;
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid #667eea;
}

.sponsorship-donate h2 {
    font-size: 24px;
    color: #1f2937;
    margin-bottom: 15px;
}

.sponsorship-donate p {
    color: #6b7280;
    font-size: 16px;
    margin-bottom: 25px;
}

.btn-donate {
    display: inline-block;
    padding: 12px 32px;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.3s;
}

.btn-donate:hover {
    background: #5568d3;
}

.sponsorship-intro {
    background: #f0f4ff;
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 40px;
    border-left: 4px solid #667eea;
}

.sponsorship-intro h2 {
    color: #1f2937;
    margin-bottom: 15px;
}

.sponsorship-intro p {
    color: #4b5563;
    margin-bottom: 15px;
}

.sponsorship-intro ul {
    list-style: none;
    padding: 0;
}

.sponsorship-intro li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #4b5563;
}

.sponsorship-intro li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

.sponsorship-tiers {
    margin-bottom: 40px;
}

.sponsorship-tiers h2 {
    font-size: 24px;
    color: #1f2937;
    margin-bottom: 25px;
    text-align: center;
}

.tier-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.tier-card {
    background: white;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.tier-card:hover {
    border-color: #667eea;
    box-shadow: 0 8px 16px rgba(102, 126, 234, 0.15);
    transform: translateY(-5px);
}

.tier-card.featured {
    border-color: #667eea;
    background: #f0f4ff;
    transform: scale(1.05);
}

.tier-card h3 {
    font-size: 18px;
    color: #1f2937;
    margin-bottom: 10px;
}

.tier-price {
    font-size: 24px;
    color: #667eea;
    font-weight: bold;
    margin-bottom: 20px;
}

.tier-card ul {
    list-style: none;
    padding: 0;
    margin-bottom: 20px;
    text-align: left;
}

.tier-card li {
    padding: 8px 0;
    color: #6b7280;
    font-size: 14px;
    border-bottom: 1px solid #f3f4f6;
}

.tier-card li:last-child {
    border-bottom: none;
}

.btn-sponsor {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
    width: 100%;
}

.btn-sponsor:hover {
    background: #5568d3;
}

.sponsorship-other {
    margin-top: 40px;
}

.sponsorship-other h2 {
    font-size: 24px;
    color: #1f2937;
    margin-bottom: 25px;
    text-align: center;
}

.support-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.support-option {
    background: #f9fafb;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e5e7eb;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.support-option:hover {
    border-color: #667eea;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.1);
}

.support-option h3 {
    font-size: 16px;
    color: #1f2937;
    margin-bottom: 10px;
}

.support-option p {
    color: #6b7280;
    font-size: 14px;
    line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .jwt-container {
        grid-template-columns: 1fr;
    }

    .rsa-container {
        grid-template-columns: 1fr;
    }



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

    .tier-card.featured {
        transform: scale(1);
    }

    .support-options {
        grid-template-columns: 1fr;
    }
}

/* 站点地图校验工具样式 */
.url-input-section {
    margin-bottom: 20px;
    padding: 15px;
    background: #f9f9f9;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
}

.url-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.url-input {
    flex: 1;
    padding: 10px 15px;
    border: 2px solid #dcdfe6;
    border-radius: 6px;
    font-size: 14px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    transition: border-color 0.3s;
}

.url-input:focus {
    outline: none;
    border-color: #409eff;
}

.url-input::placeholder {
    color: #c0c4cc;
}

.editor-panel {
    display: flex;
    flex-direction: column;
}

.editor-panel label {
    font-size: 14px;
    font-weight: 600;
    color: #606266;
    margin-bottom: 10px;
}

.validation-stats {
    margin-top: 20px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
}

.validation-stats h3 {
    margin-bottom: 15px;
    font-size: 16px;
    color: #333;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    padding: 12px;
    background: white;
    border-radius: 6px;
    border: 1px solid #dcdfe6;
}

.stat-label {
    font-size: 12px;
    color: #909399;
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
    color: #409eff;
}

.validation-details {
    margin-top: 20px;
    padding: 20px;
    background: #f9f9f9;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
}

.validation-details h3 {
    margin-bottom: 15px;
    font-size: 16px;
    color: #333;
}

#validation-details-content {
    font-size: 13px;
    line-height: 1.6;
    color: #606266;
}

@media (max-width: 768px) {
    .url-input-group {
        flex-direction: column;
    }

    .url-input {
        width: 100%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.sitemap-help {
    margin-top: 20px;
    padding: 20px;
    background: #f0f9ff;
    border-radius: 6px;
    border: 1px solid #b3d8ff;
}

.help-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.sitemap-help h3 {
    margin-bottom: 0;
    font-size: 16px;
    color: #0066cc;
}

.sitemap-help pre {
    background: white;
    border: 1px solid #dcdfe6;
    border-radius: 6px;
    padding: 15px;
    overflow-x: auto;
    font-size: 12px;
    line-height: 1.5;
}

.sitemap-help code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    color: #333;
}