/* ==================== 基础样式重置 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 简洁浅色主题 - 类似 uutool.cn */
    --primary-color: #5b8ff9;
    --primary-hover: #3d7bf5;
    --secondary-color: #667eea;
    --accent-color: #10b981;
    --accent-secondary: #14b8a6;
    --background-color: #f5f7fa;
    --background-secondary: #ffffff;
    --surface-color: #ffffff;
    --surface-hover: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #5b8ff9 0%, #3d7bf5 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f9fafb 100%);
    --gradient-bg: linear-gradient(180deg, #f5f7fa 0%, #ffffff 100%);
}

/* 亮色主题 */
[data-theme="light"] {
    --primary-color: #7c3aed;
    --primary-hover: #6d28d9;
    --secondary-color: #8b5cf6;
    --accent-color: #0891b2;
    --accent-secondary: #06b6d4;
    --background-color: #f8fafc;
    --background-secondary: #f1f5f9;
    --surface-color: rgba(255, 255, 255, 0.9);
    --surface-hover: rgba(248, 250, 252, 1);
    --card-bg: linear-gradient(145deg, rgba(255, 255, 255, 0.95) 0%, rgba(248, 250, 252, 0.9) 100%);
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: rgba(139, 92, 246, 0.15);
    --border-glow: rgba(124, 58, 237, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1), 0 0 20px rgba(139, 92, 246, 0.05);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12), 0 0 40px rgba(139, 92, 246, 0.08);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15), 0 0 60px rgba(139, 92, 246, 0.1);
    --shadow-glow: 0 0 20px rgba(124, 58, 237, 0.2);
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #6366f1 50%, #0891b2 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
    --gradient-card: linear-gradient(145deg, rgba(139, 92, 246, 0.05) 0%, rgba(6, 182, 212, 0.02) 100%);
    --gradient-bg: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
}

/* 暗色主题 */
[data-theme="dark"] {
    --primary-color: #818cf8;
    --primary-hover: #a5b4fc;
    --secondary-color: #a78bfa;
    --accent-color: #22d3ee;
    --accent-secondary: #2dd4bf;
    --background-color: #0f172a;
    --background-secondary: #1e293b;
    --surface-color: rgba(30, 41, 59, 0.95);
    --surface-hover: rgba(51, 65, 85, 1);
    --card-bg: linear-gradient(145deg, rgba(30, 41, 59, 0.95) 0%, rgba(15, 23, 42, 0.9) 100%);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(148, 163, 184, 0.2);
    --border-hover: rgba(148, 163, 184, 0.3);
    --border-glow: rgba(129, 140, 248, 0.4);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4), 0 0 20px rgba(129, 140, 248, 0.1);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 40px rgba(129, 140, 248, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 60px rgba(129, 140, 248, 0.2);
    --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(129, 140, 248, 0.3);
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    --gradient-card: linear-gradient(145deg, rgba(99, 102, 241, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    --gradient-bg: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
    background: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition-normal), color var(--transition-normal);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

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

/* ==================== 头部导航 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .header {
    background: rgba(15, 23, 42, 0.95);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    flex-shrink: 0;
}

.logo i {
    font-size: 1.8rem;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.nav a {
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.nav a:hover {
    background: var(--primary-color);
    color: white;
}

.search-box {
    position: relative;
    flex-shrink: 0;
}

.search-box input {
    width: 200px;
    padding: 10px 40px 10px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    width: 260px;
}

.search-box i {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--surface-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: rotate(15deg);
}

/* ==================== 主要内容区 ==================== */
.main {
    padding-top: 100px;
    padding-bottom: 60px;
    min-height: calc(100vh - 200px);
}

/* 欢迎区域 */
.hero {
    text-align: center;
    padding: 60px 40px 70px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    margin-bottom: 40px;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero p {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ==================== 工具区块 ==================== */
.tool-section {
    margin-bottom: 50px;
}

.section-header {
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.section-header h2 i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.88rem;
}

/* 工具网格 - 每行4列 */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

/* 工具卡片 - 横向长条布局 */
.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 12px;
}

.tool-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.tool-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.2rem;
    color: white;
    transition: all var(--transition-normal);
}

.tool-card:hover .tool-icon {
    transform: scale(1.05);
}

.tool-card h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
    flex-shrink: 0;
    white-space: nowrap;
}

.tool-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 隐藏的工具卡片（搜索过滤） */
.tool-card.hidden {
    display: none;
}

/* ==================== 模态框 ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: 20px;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    transform: scale(0.9) translateY(20px);
    transition: transform var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.modal.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--background-color);
}

.modal-header h2 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.8rem;
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

/* ==================== 工具通用样式 ==================== */
.tool-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.tool-row.single {
    grid-template-columns: 1fr;
}

.tool-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tool-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.tool-input,
.tool-textarea,
.tool-select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.tool-textarea {
    min-height: 150px;
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

.tool-input:focus,
.tool-textarea:focus,
.tool-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.tool-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.tool-btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

.tool-btn-secondary {
    background: var(--background-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.tool-result {
    background: var(--background-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    word-break: break-all;
    white-space: pre-wrap;
    min-height: 100px;
    max-height: 300px;
    overflow-y: auto;
}

.tool-options {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: center;
}

.tool-option {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.tool-option input[type="checkbox"],
.tool-option input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.tool-option label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

/* 文件上传区域 */
.file-upload {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-upload:hover {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
}

.file-upload i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.file-upload p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.file-upload span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.file-upload input {
    display: none;
}

/* 图片预览 */
.image-preview {
    max-width: 100%;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

/* 颜色选择器 */
.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
}

.color-picker-wrapper input[type="color"] {
    width: 60px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

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

.footer-bottom .disclaimer {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 12px;
    padding: 10px 20px;
    background: var(--background-color);
    border-radius: var(--radius-md);
    display: inline-block;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px 24px;
    margin-top: 16px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

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

/* ==================== 回到顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1200px) {
    .nav {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header .container {
        height: 60px;
    }
    
    .logo span {
        display: none;
    }
    
    .search-box input {
        width: 150px;
    }
    
    .search-box input:focus {
        width: 180px;
    }
    
    .hero {
        padding: 40px 20px 50px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .tool-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }
    
    .tool-card {
        padding: 20px;
    }
    
    .tool-icon {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
    }
    
    .modal-content {
        max-height: 95vh;
        border-radius: var(--radius-lg);
    }
    
    .tool-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .main {
        padding-top: 80px;
    }
    
    .hero {
        margin-bottom: 40px;
        border-radius: var(--radius-lg);
    }
    
    .stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .section-header h2 {
        font-size: 1.3rem;
    }
    
    .tool-grid {
        grid-template-columns: 1fr;
    }
    
    .tool-actions {
        flex-direction: column;
    }
    
    .tool-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tool-section {
    animation: fadeIn 0.6s ease forwards;
}

.tool-section:nth-child(2) { animation-delay: 0.1s; }
.tool-section:nth-child(3) { animation-delay: 0.2s; }
.tool-section:nth-child(4) { animation-delay: 0.3s; }
.tool-section:nth-child(5) { animation-delay: 0.4s; }
.tool-section:nth-child(6) { animation-delay: 0.5s; }
.tool-section:nth-child(7) { animation-delay: 0.6s; }

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.8s linear infinite;
}

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

/* 提示消息 */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--surface-color);
    padding: 12px 24px;
    border-radius: var(--radius-lg);
    font-size: 0.9rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 3000;
    box-shadow: var(--shadow-xl);
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: #10b981;
    color: white;
}

.toast.error {
    background: #ef4444;
    color: white;
}

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

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

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

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

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

/* ==================== 工具独立页面样式 ==================== */

/* 工具页面顶部导航栏 */
.tool-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: color-mix(in srgb, var(--surface-color) 88%, transparent);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .tool-header {
    background: color-mix(in srgb, #0f172a 88%, transparent);
}

.tool-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 68px;
    gap: 20px;
}

.tool-header .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    flex-shrink: 0;
}

.tool-header .logo i {
    font-size: 1.5rem;
}

.tool-header .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.92rem;
    color: var(--text-secondary);
    flex: 1;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.tool-header .breadcrumb a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.tool-header .breadcrumb a:hover {
    color: var(--primary-color);
}

.tool-header .breadcrumb span {
    color: var(--text-muted);
}

.tool-header .theme-toggle {
    flex-shrink: 0;
}

/* 工具页面主体区域 */
.tool-main {
    padding-top: 92px;
    padding-bottom: 28px;
}

.tool-main .tool-info {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding: 0 0 22px;
    border-bottom: 1px solid var(--border-color);
}

.tool-main .tool-info .tool-icon {
    width: 56px;
    height: 56px;
    font-size: 1.5rem;
}

.tool-main .tool-info h1 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tool-main .tool-info p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.tool-page-header {
    background: var(--gradient-primary);
    padding: 40px 0;
    margin-top: 70px; /* 为固定导航栏留出空间 */
    margin-bottom: 40px;
    color: white;
}

.tool-page-header .container {
    display: flex;
    align-items: center;
    gap: 24px;
}

.tool-page-header .back-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.tool-page-header .back-link:hover {
    color: white;
}

.tool-page-header .tool-title {
    flex: 1;
}

.tool-page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.tool-page-header h1 i {
    font-size: 1.6rem;
    opacity: 0.9;
}

.tool-page-header .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    opacity: 0.85;
}

.tool-page-header .breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.tool-page-header .breadcrumb a:hover {
    color: white;
}

.tool-page-header .breadcrumb span {
    opacity: 0.6;
}

/* 工具内容区域 */
.tool-page-content {
    padding-bottom: 60px;
}

.tool-main-area {
    background: var(--surface-color);
    border-radius: 24px;
    padding: 32px;
    margin-bottom: 0;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.tool-main-area::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0.95;
}

/* 相关工具推荐 */
.related-tools {
    margin-top: 0;
    padding: 12px 0 36px;
    background: transparent;
}

.related-tools h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.related-tools h2 i {
    color: var(--primary-color);
}

.related-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.related-tool-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition-normal);
    display: block;
}

.related-tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.related-tool-card .tool-icon {
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.related-tool-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.related-tool-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 简化版页脚 */
.simple-footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    text-align: center;
}

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

.simple-footer a {
    color: var(--primary-color);
    margin: 0 12px;
}

/* 工具页面导航栏调整 */
.header-simple .container {
    justify-content: space-between;
}

.header-simple .nav-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-simple .nav-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: color var(--transition-fast);
}

.header-simple .nav-links a:hover {
    color: var(--primary-color);
}

/* 响应式 - 工具页面 */
@media (max-width: 768px) {
    .tool-page-header {
        padding: 30px 0;
        margin-top: 60px; /* 移动端导航栏高度 */
    }

    .tool-page-header .container {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .tool-page-header h1 {
        font-size: 1.5rem;
    }

    .tool-header .container {
        min-height: 60px;
        gap: 12px;
    }

    .tool-header .logo span {
        display: none;
    }

    .tool-header .breadcrumb {
        order: 3;
        flex-basis: 100%;
        font-size: 0.85rem;
    }

    .tool-main {
        padding-top: 86px;
    }

    .tool-main .tool-info {
        align-items: flex-start;
    }

    .tool-main-area {
        padding: 20px;
        border-radius: var(--radius-lg);
    }

    .related-tools-grid {
        grid-template-columns: 1fr;
    }
}

.tool-loading-state,
.tool-empty-state {
    text-align: center;
    padding: 56px 20px;
    color: var(--text-secondary);
}

.tool-loading-state p,
.tool-empty-state p {
    margin-top: 14px;
    font-size: 0.98rem;
}

.tool-empty-state i {
    font-size: 40px;
    color: var(--primary-color);
}

.tool-empty-state a {
    display: inline-flex;
    margin-top: 16px;
    color: var(--primary-color);
    font-weight: 600;
}

.tool-empty-state-error i {
    color: #ef4444;
}

.tool-alert {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px 16px;
    margin-bottom: 18px;
    border-radius: 14px;
    border: 1px solid var(--border-color);
    background: var(--background-color);
    color: var(--text-secondary);
}

.tool-alert i {
    margin-top: 2px;
    color: #f59e0b;
}

.tool-alert strong {
    color: var(--text-primary);
}

.tool-alert-desc {
    margin-top: 4px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

/* ==================== 广告容器样式 ==================== */
.ad-container {
    margin: 16px 0;
    text-align: center;
    overflow: hidden;
}

.ad-container img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

.ad-header-top {
    margin: 0;
    padding: 8px 0;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
}

.ad-header-bottom {
    max-width: 1400px;
    margin: 0 auto 16px;
    padding: 0 24px;
}

.ad-content-top,
.ad-content-bottom {
    max-width: 1400px;
    margin: 16px auto;
    padding: 0 24px;
}

.ad-tool-before,
.ad-tool-after {
    margin: 16px 0;
    padding: 16px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.ad-footer-top {
    max-width: 1400px;
    margin: 0 auto 16px;
    padding: 0 24px;
}

.ad-sidebar {
    margin: 16px 0;
    padding: 16px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

/* 工具禁用样式 */
.tool-card.tool-disabled {
    display: none !important;
}

/* ==================== 全局浮动导航按钮组 ==================== */
.global-floating-nav {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
}

.global-floating-nav .nav-btn {
    width: 50px;
    height: 50px;
    border: none;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.global-floating-nav .nav-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.global-floating-nav .nav-btn.always-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.global-floating-nav .nav-btn:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    color: white;
}

.global-floating-nav .nav-btn.always-visible:hover {
    transform: translateY(-5px);
}

/* 不同按钮的样式 */
.global-floating-nav .btn-home {
    background: var(--gradient-secondary);
}

.global-floating-nav .btn-top {
    background: var(--gradient-primary);
}

.global-floating-nav .btn-bottom {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.global-floating-nav .btn-custom {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

/* 自定义按钮带文字样式 */
.global-floating-nav .nav-btn.with-text {
    width: auto;
    min-width: 50px;
    border-radius: 25px;
    padding: 0 16px;
    gap: 8px;
}

.global-floating-nav .nav-btn.with-text span {
    font-size: 0.85rem;
    white-space: nowrap;
}

/* 响应式 */
@media (max-width: 768px) {
    .global-floating-nav {
        bottom: 20px;
        right: 20px;
        gap: 10px;
    }

    .global-floating-nav .nav-btn {
        width: 44px;
        height: 44px;
        font-size: 1rem;
    }

    .global-floating-nav .nav-btn.with-text {
        padding: 0 12px;
    }

    .global-floating-nav .nav-btn.with-text span {
        font-size: 0.8rem;
    }
}

/* ==================== 2026-03 UI refresh ==================== */
.hero::before,
.hero::after {
    content: "";
    position: absolute;
    inset: auto;
    border-radius: 999px;
    pointer-events: none;
}

.hero::before {
    width: 280px;
    height: 280px;
    top: -80px;
    right: -40px;
    background: rgba(255,255,255,0.14);
    filter: blur(2px);
}

.hero::after {
    width: 220px;
    height: 220px;
    left: -60px;
    bottom: -90px;
    background: rgba(255,255,255,0.08);
}

.hero > * {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    margin-bottom: 18px;
    border: 1px solid rgba(255,255,255,0.24);
    border-radius: 999px;
    background: rgba(255,255,255,0.12);
    font-size: 0.9rem;
    backdrop-filter: blur(12px);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin: -10px 0 34px;
}

.hero-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    border-radius: 999px;
    font-weight: 600;
    transition: transform var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.hero-action.primary {
    background: #fff;
    color: #4c1d95;
}

.hero-action.secondary {
    color: #fff;
    background: rgba(255,255,255,0.14);
    border: 1px solid rgba(255,255,255,0.22);
}


.hero-action:hover {
    color: inherit;
    transform: translateY(-2px);
}

.quick-panel {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 24px;
    margin-bottom: 36px;
    box-shadow: var(--shadow-md);
}

.quick-search-tip {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 18px;
    align-items: center;
}

.quick-search-copy h2 {
    font-size: 1.2rem;
    margin-bottom: 6px;
}

.quick-search-copy p,
.search-status {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.quick-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}


.service-entry-card--lite {
    box-shadow: none;
}








    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    white-space: nowrap;
}

    color: var(--primary-color);
}

    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.quick-search-meta,
.category-shortcuts {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.quick-pill,
.category-shortcuts a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 999px;
    background: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.category-shortcuts {
    margin-bottom: 14px;
}

.category-shortcuts a:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.search-box {
    min-width: 220px;
}

.search-box input {
    width: 220px;
}

.tool-card {
    min-height: 84px;
    box-shadow: var(--shadow-sm);
}

.tool-card:hover {
    border-color: var(--primary-color);
}

.tool-card:focus-visible,
.nav a:focus-visible,
.hero-action:focus-visible,
.category-shortcuts a:focus-visible,
.theme-toggle:focus-visible {
    outline: 3px solid rgba(124,58,237,0.2);
    outline-offset: 2px;
}

.social-link.disabled {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--background-color);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    cursor: not-allowed;
}

.no-results {
    padding: 20px;
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    text-align: center;
    margin-top: 16px;
    background: var(--surface-hover);
}

@media (max-width: 1200px) {
    .quick-search-tip {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 768px) {
    .quick-meta-row {
        align-items: stretch;
    }

    
@media (max-width: 480px) {
    .hero-badge {
        font-size: 0.82rem;
    }

    .hero-action {
        width: 100%;
        justify-content: center;
    }

    .quick-pill,
    .category-shortcuts a {
        width: 100%;
        justify-content: center;
    }
}




    content: '';
    position: absolute;
    inset: auto -30px -30px auto;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.12), transparent 68%);
    pointer-events: none;
}


    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

    font-size: clamp(1.8rem, 3vw, 2.4rem);
    line-height: 1.1;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

    margin-top: 8px;
    font-size: 0.88rem;
    color: var(--text-muted);
}

    color: var(--primary-color);
}

    color: #ef4444;
}

@media (max-width: 768px) {