* Tools Page - Neon Glassmorphism 风格 + 主题切换 */

/* 移除默认focus outline并添加自定义样式 */
*:focus {
    outline: none !important;
}

*:focus-visible {
    outline: 2px solid var(--accent-primary) !important;
    outline-offset: 2px;
}

/* 美化滚动条 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 5px;
    border: 2px solid var(--scrollbar-track);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Firefox滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

:root {
    /* 暗黑主题（默认） */
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252540;
    --text-primary: #e2e8f0;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --accent-primary: #8b5cf6;
    --accent-secondary: #ec4899;
    --accent-tertiary: #3b82f6;
    --gradient-primary: linear-gradient(135deg, #8b5cf6, #ec4899);
    --gradient-secondary: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-text: linear-gradient(135deg, #a78bfa, #ec4899);
    --glass-bg: rgba(26, 26, 46, 0.8);
    --glass-border: rgba(139, 92, 246, 0.2);
    --glass-glow: linear-gradient(135deg, rgba(139, 92, 246, 0.5), rgba(236, 72, 153, 0.3), rgba(59, 130, 246, 0.5));
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 60px rgba(139, 92, 246, 0.1);
    --button-bg: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(59, 130, 246, 0.2));
    --button-border: rgba(139, 92, 246, 0.4);
    --button-shadow: 0 8px 25px rgba(139, 92, 246, 0.4), 0 0 40px rgba(139, 92, 246, 0.2);
    --card-bg: rgba(26, 26, 46, 0.9);
    --card-border: rgba(139, 92, 246, 0.2);
    --card-hover-border: rgba(139, 92, 246, 0.4);
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --input-focus: rgba(139, 92, 246, 0.5);
    --input-focus-glow: rgba(139, 92, 246, 0.2);
    --nav-item-bg: rgba(255, 255, 255, 0.03);
    --nav-item-border: rgba(255, 255, 255, 0.05);
    --nav-item-hover: rgba(139, 92, 246, 0.15);
    --nav-item-active-bg: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(59, 130, 246, 0.15));
    --scrollbar-track: rgba(255, 255, 255, 0.05);
    --scrollbar-thumb: rgba(139, 92, 246, 0.3);
    --sidebar-width: 280px;
    --accent-hover: rgba(139, 92, 246, 0.6);
    --error-bg: rgba(239, 68, 68, 0.1);
    --error-border: rgba(239, 68, 68, 0.3);
    --success-bg: rgba(34, 197, 94, 0.1);
    --success-border: rgba(34, 197, 94, 0.3);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --input-bg-hover: rgba(255, 255, 255, 0.08);
    --checkbox-hover-bg: rgba(139, 92, 246, 0.05);
    --btn-inset-highlight: rgba(255, 255, 255, 0.1);
    --focus-ring: rgba(139, 92, 246, 0.2);
    --ripple-color: radial-gradient(circle, rgba(255, 255, 255, 0.3), transparent);
}

[data-theme="light"] {
    /* 白天主题 */
    --bg-primary: #f0f4f8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e2e8f0;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    --accent-primary: #667eea;
    --accent-secondary: #ec4899;
    --accent-tertiary: #3b82f6;
    --gradient-primary: linear-gradient(135deg, #667eea, #764ba2);
    --gradient-secondary: linear-gradient(135deg, #3b82f6, #667eea);
    --gradient-text: linear-gradient(135deg, #667eea, #764ba2);
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-glow: linear-gradient(135deg, rgba(102, 126, 234, 0.5), rgba(118, 75, 162, 0.3), rgba(102, 126, 234, 0.5));
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --button-bg: linear-gradient(135deg, rgba(102, 126, 234, 0.8), rgba(59, 130, 246, 0.6));
    --button-border: rgba(102, 126, 234, 0.4);
    --button-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-border: rgba(255, 255, 255, 0.8);
    --card-hover-border: rgba(102, 126, 234, 0.4);
    --input-bg: rgba(255, 255, 255, 0.9);
    --input-border: rgba(255, 255, 255, 0.5);
    --input-focus: rgba(102, 126, 234, 0.5);
    --input-focus-glow: rgba(102, 126, 234, 0.2);
    --nav-item-bg: rgba(255, 255, 255, 0.6);
    --nav-item-border: rgba(255, 255, 255, 0.8);
    --nav-item-hover: rgba(102, 126, 234, 0.1);
    --nav-item-active-bg: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.1));
    --scrollbar-track: rgba(255, 255, 255, 0.9);
    --scrollbar-thumb: rgba(102, 126, 234, 0.3);
    --accent-hover: rgba(102, 126, 234, 0.6);
    --error-bg: rgba(239, 68, 68, 0.1);
    --error-border: rgba(239, 68, 68, 0.3);
    --success-bg: rgba(34, 197, 94, 0.1);
    --success-border: rgba(34, 197, 94, 0.3);
    --border-subtle: rgba(0, 0, 0, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --input-bg-hover: rgba(0, 0, 0, 0.03);
    --checkbox-hover-bg: rgba(102, 126, 234, 0.05);
    --btn-inset-highlight: rgba(255, 255, 255, 0.5);
    --focus-ring: rgba(102, 126, 234, 0.2);
    --ripple-color: radial-gradient(circle, rgba(0, 0, 0, 0.06), transparent);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    transition: background 0.3s ease, color 0.3s ease;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    transition: opacity 0.3s ease;
}

[data-theme="dark"] body::before {
    background: 
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%);
}

[data-theme="light"] body::before {
    background: 
        radial-gradient(circle at 10% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 侧边栏样式 */
.tools-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-secondary);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1rem;
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    z-index: 1000;
}

@media (min-width: 1024px) {
    .tools-sidebar {
        position: fixed;
        top: 0;
        left: 0;
    }
}

@media (max-width: 1023px) {
    .tools-sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .tools-sidebar.show {
        transform: translateX(0);
    }
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

@media (max-width: 1023px) {
    .sidebar-overlay.show {
        opacity: 1;
        pointer-events: auto;
    }
}

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

@media (max-width: 1023px) {
    .sidebar-header {
        animation: fadeInDown 0.4s ease;
    }
    
    @keyframes fadeInDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

.sidebar-logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (max-width: 1023px) {
    .sidebar-logo {
        animation: breathe 3s ease-in-out infinite;
    }
    
    @keyframes breathe {
        0%, 100% { opacity: 1; }
        50% { opacity: 0.8; }
    }
}

.sidebar-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--nav-item-bg);
    border: 1px solid var(--nav-item-border);
    border-radius: 10px;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@media (max-width: 1023px) {
    .sidebar-close:hover {
        background: var(--error-bg);
        border-color: var(--error-border);
        transform: rotate(90deg) scale(1.1);
    }
    
    .sidebar-close:active {
        transform: rotate(90deg) scale(0.95);
    }
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.5rem;
    position: relative;
}

.nav-slider {
    position: absolute;
    left: 0;
    width: 4px;
    border-radius: 0 4px 4px 0;
    background: var(--gradient-primary);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.5);
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: top 0.2s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.15s ease;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

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

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

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 14px;
    background: var(--nav-item-bg);
    border: 1px solid var(--nav-item-border);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
    animation: slideInRight 0.25s ease backwards;
}

.sidebar-nav a:nth-child(2) { animation-delay: 0.04s; }
.sidebar-nav a:nth-child(3) { animation-delay: 0.08s; }
.sidebar-nav a:nth-child(4) { animation-delay: 0.12s; }
.sidebar-nav a:nth-child(5) { animation-delay: 0.16s; }
.sidebar-nav a:nth-child(6) { animation-delay: 0.20s; }
.sidebar-nav a:nth-child(7) { animation-delay: 0.24s; }
.sidebar-nav a:nth-child(8) { animation-delay: 0.28s; }

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(-16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@media (max-width: 1023px) {
    .sidebar-nav a:hover {
        color: var(--text-primary);
        transform: translateX(5px);
        border-color: var(--accent-primary);
    }
    
    .sidebar-nav a:hover span:first-child {
        animation: bounce 0.5s ease;
    }
    
    @keyframes bounce {
        0%, 100% { transform: translateY(0); }
        50% { transform: translateY(-2px); }
    }
}

.sidebar-nav a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--nav-item-hover);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: inherit;
}

.sidebar-nav a:hover::before {
    opacity: 1;
}

.sidebar-nav a span:first-child {
    font-size: 1.5rem;
    position: relative;
    z-index: 1;
}

@media (max-width: 1023px) {
    .sidebar-nav a span:first-child {
        transition: transform 0.3s ease;
    }
}

.sidebar-nav a span:last-child {
    position: relative;
    z-index: 1;
}

.sidebar-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 1.5rem 0;
}

@media (max-width: 1023px) {
    .sidebar-divider {
        background: linear-gradient(90deg, transparent, var(--gradient-primary), transparent);
        animation: shimmer 3s ease-in-out infinite;
    }
    
    @keyframes shimmer {
        0%, 100% { opacity: 0.5; }
        50% { opacity: 1; }
    }
}

.theme-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--nav-item-bg);
    border-radius: 12px;
    border: 1px solid var(--nav-item-border);
}

@media (max-width: 1023px) {
    .theme-section {
        animation: fadeInUp 0.4s ease backwards;
        animation-delay: 0.3s;
    }
    
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .theme-section:hover {
        border-color: var(--accent-primary);
        box-shadow: 0 0 15px var(--focus-ring);
    }
}

.theme-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--nav-item-active-bg);
    color: var(--text-primary);
    border-color: var(--accent-primary);
    box-shadow: var(--glass-shadow);
}

@media (max-width: 1023px) {
    .sidebar-nav a.active {
        animation: pulse 2s ease-in-out infinite 0.55s;
    }
    
    @keyframes pulse {
        0%, 100% { box-shadow: var(--glass-shadow); }
        50% { box-shadow: var(--glass-shadow), 0 0 15px rgba(139, 92, 246, 0.3); }
    }
}

.sidebar-nav a span:first-child {
    font-size: 1.5rem;
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.sidebar-nav a span:last-child {
    position: relative;
    z-index: 1;
}

.sidebar-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gradient-primary), transparent);
    margin: 1.5rem 0;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.theme-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--nav-item-bg);
    border-radius: 12px;
    border: 1px solid var(--nav-item-border);
    transition: all 0.3s ease;
    animation: fadeInUp 0.5s ease backwards;
    animation-delay: 0.5s;
}

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

.theme-section:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px var(--focus-ring);
}

.theme-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    animation: fadeInUp 0.3s ease 0.32s backwards;
}

.sidebar-home {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 14px;
    background: var(--nav-item-bg);
    border: 1px solid var(--nav-item-border);
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    font-size: 0.95rem;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sidebar-home:hover {
    color: var(--accent-primary);
    background: var(--nav-item-hover);
}

/* 汉堡按钮 */
.burger-btn {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    width: 48px;
    height: 48px;
    background: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: 14px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    z-index: 1001;
    box-shadow: var(--button-shadow);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@media (max-width: 1023px) {
    .burger-btn {
        display: flex;
    }
    
    .burger-btn.hide {
        transform: scale(0);
        opacity: 0;
        pointer-events: none;
    }
}

.burger-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--button-shadow);
    background: var(--nav-item-hover);
}

.burger-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.burger-btn.is-open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger-btn.is-open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.burger-btn.is-open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (min-width: 1024px) {
    .burger-btn {
        display: none;
    }
}

/* PC端隐藏关闭按钮 */
@media (min-width: 1024px) {
    .sidebar-close {
        display: none !important;
    }
}

/* 主题切换按钮 */
.theme-toggle {
    width: 70px;
    height: 36px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 20px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background-color 0.2s ease, transform 0.2s ease;
    padding: 0;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px var(--input-focus-glow);
}

.toggle-track {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-icons {
    position: absolute;
    width: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 0 8px;
    z-index: 1;
}

.icon {
    font-size: 14px;
    opacity: 0.4;
    transition: opacity 0.2s ease;
}

.icon.active {
    opacity: 1;
    transform: scale(1.1);
}

.toggle-knob {
    width: 28px;
    height: 28px;
    background: var(--gradient-primary);
    border-radius: 50%;
    position: absolute;
    left: 4px;
    transition: left 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), background 0.2s ease;
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
    z-index: 2;
}

.toggle-knob.is-dark {
    left: calc(100% - 32px);
    background: var(--gradient-secondary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

/* 内容区域 */
.content-area {
    min-height: 100vh;
    padding: 1.5rem;
}

@media (min-width: 1024px) {
    .content-area {
        padding-left: calc(var(--sidebar-width) + 1.5rem);
    }
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-top: 2rem;
    animation: fadeInUp 0.6s ease-out;
}

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

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
}

.page-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* 玻璃卡片 */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    padding: 2rem;
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--glass-glow);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.glass-card:hover {
    transform: translateY(-4px);
    border-color: var(--card-hover-border);
    box-shadow: var(--glass-shadow);
}

/* 分类卡片 */
.category-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 1.5rem;
    padding: 2rem;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--glass-glow);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.category-card:hover::before {
    opacity: 1;
}

.category-card:hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
    box-shadow: var(--glass-shadow);
}

.category-icon {
    width: 70px;
    height: 70px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.25rem;
    border-radius: 18px;
    background: var(--gradient-primary);
    box-shadow: var(--button-shadow);
    transition: transform 0.2s ease;
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

.category-info {
    flex: 1;
}

.category-name {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.category-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.category-count {
    font-size: 0.8125rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 500;
}

.category-arrow {
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: transform 0.2s ease, color 0.2s ease;
}

.category-card:hover .category-arrow {
    transform: translateX(5px);
    color: var(--accent-primary);
}

/* 工具卡片 */
.tool-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 1.5rem;
    padding: 1.5rem;
    text-decoration: none;
    color: var(--text-primary);
    display: block;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--glass-glow);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card:hover {
    transform: translateY(-8px) rotate(1deg);
    border-color: var(--card-hover-border);
    box-shadow: var(--glass-shadow);
}

.tool-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.875rem;
    border-radius: 50%;
    background: var(--gradient-primary);
    box-shadow: var(--button-shadow);
    transition: transform 0.2s ease;
}

.tool-card:hover .tool-icon {
    transform: scale(1.1) rotate(10deg);
}

.tool-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.tool-desc {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 网格布局 */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

@media (max-width: 1200px) {
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .grid-4, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .category-card {
        flex-direction: column;
        text-align: center;
    }
    
    .page-title {
        font-size: 2rem;
    }
}

/* 按钮样式 */
.neu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    background: var(--button-bg);
    border: 1px solid var(--button-border);
    border-radius: 1rem;
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 600;
    box-shadow: var(--button-shadow);
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.neu-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: var(--ripple-color);
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
    border-radius: 50%;
}

.neu-btn:hover::before {
    width: 300px;
    height: 300px;
}

.neu-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--button-shadow), inset 0 1px 0 var(--btn-inset-highlight);
    border-color: var(--accent-hover);
    background: var(--nav-item-hover);
}

.neu-btn:active {
    transform: translateY(-2px) scale(0.98);
}

.neu-btn.secondary {
    background: var(--nav-item-bg);
    border-color: var(--nav-item-border);
    color: var(--text-primary);
}

.neu-btn.secondary:hover {
    background: var(--nav-item-hover);
    border-color: var(--accent-primary);
}

/* 表单元素 */
textarea, input[type="text"], input[type="number"], select {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--input-border);
    border-radius: 0.875rem;
    background: var(--input-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    font-size: 1rem;
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

textarea:focus, input:focus, select:focus {
    outline: none;
    border-color: var(--input-focus);
    box-shadow: 0 0 30px var(--input-focus-glow), inset 0 0 20px var(--input-focus-glow);
}

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

/* ==================== 自定义下拉框组件 ==================== */
.custom-select {
    position: relative;
    display: inline-block;
    min-width: 140px;
}
.custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}
.custom-select-trigger:hover {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}
.custom-select.open .custom-select-trigger {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}
.custom-select-arrow {
    width: 12px;
    height: 12px;
    margin-left: 12px;
    transition: transform 0.2s ease;
    opacity: 0.7;
}
.custom-select.open .custom-select-arrow {
    transform: rotate(180deg);
}
.custom-select-options {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: #1a1a2e;
    border: 1px solid var(--accent-primary);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    overflow: hidden;
    max-height: 0;
}
.custom-select.open .custom-select-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    max-height: 300px;
    overflow-y: auto;
}
.custom-select-option {
    padding: 10px 14px;
    color: #e0e0e0;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s ease;
}
.custom-select-option:hover {
    background: rgba(139, 92, 246, 0.2);
}
.custom-select-option.selected {
    background: var(--accent-primary);
    color: #fff;
    font-weight: 600;
}

/* 浅色主题下的下拉框样式 */
[data-theme="light"] .custom-select-trigger {
    background: #ffffff;
    border-color: #e2e8f0;
    color: #1f2937;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
[data-theme="light"] .custom-select-trigger:hover {
    background: #f8f9fa;
    border-color: var(--accent-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}
[data-theme="light"] .custom-select.open .custom-select-trigger {
    background: #ffffff;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}
[data-theme="light"] .custom-select-arrow {
    opacity: 0.6;
}
[data-theme="light"] .custom-select-options {
    background: #ffffff;
    border-color: var(--accent-primary);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}
[data-theme="light"] .custom-select-option {
    color: #1f2937;
}
[data-theme="light"] .custom-select-option:hover {
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-primary);
}
[data-theme="light"] .custom-select-option.selected {
    background: var(--accent-primary);
    color: #ffffff;
}

select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-color: var(--input-bg);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0aec0'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding: 10px 2.5rem 10px 14px;
    border: 1px solid var(--input-border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    min-width: 120px;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

select:hover {
    border-color: var(--accent-primary);
    background-color: var(--input-bg-hover);
    box-shadow: var(--shadow-md);
}

select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* 暗色主题下的 option 样式 */
[data-theme="dark"] select option,
[data-theme="dark"] select optgroup {
    background-color: #1a1a2e;
    color: #e0e0e0;
    padding: 8px 12px;
}

/* 浅色主题下的 option 样式 */
[data-theme="light"] select option,
[data-theme="light"] select optgroup {
    background-color: #ffffff;
    color: #1f2937;
    padding: 8px 12px;
}

/* Chrome / Edge 下拉箭头位置调整 */
select::-ms-expand {
    display: none;
}

/* 单选按钮样式 */
/* ==================== 自定义 Checkbox ==================== */
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--input-border);
    border-radius: 6px;
    background: var(--input-bg);
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
    flex-shrink: 0;
    vertical-align: middle;
}

input[type="checkbox"]:hover {
    border-color: var(--accent-primary);
    background: var(--checkbox-hover-bg);
}

input[type="checkbox"]:active {
    transform: scale(0.92);
}

input[type="checkbox"]:checked {
    border-color: var(--accent-primary);
    background: var(--gradient-primary);
    box-shadow: 0 2px 8px var(--focus-ring);
}

input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 5px;
    width: 5px;
    height: 10px;
    border: solid #fff;
    border-width: 0 2.5px 2.5px 0;
    transform: rotate(45deg);
    animation: checkmarkIn 0.2s ease;
}

@keyframes checkmarkIn {
    from {
        opacity: 0;
        transform: rotate(45deg) scale(0);
    }
    to {
        opacity: 1;
        transform: rotate(45deg) scale(1);
    }
}

input[type="checkbox"]:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
}

input[type="checkbox"]:checked + label,
label:has(input[type="checkbox"]:checked) {
    color: var(--accent-primary);
    font-weight: 500;
}

/* 浅色主题下的 checkbox */
[data-theme="light"] input[type="checkbox"] {
    border-color: #cbd5e1;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}
[data-theme="light"] input[type="checkbox"]:hover {
    border-color: var(--accent-primary);
    background: var(--checkbox-hover-bg);
}
[data-theme="light"] input[type="checkbox"]:checked {
    border-color: var(--accent-primary);
    background: var(--gradient-primary);
    box-shadow: 0 2px 8px var(--focus-ring);
}
[data-theme="light"] input[type="checkbox"]:checked + label,
[data-theme="light"] label:has(input[type="checkbox"]:checked) {
    color: var(--accent-primary);
}

input[type="radio"] {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--input-border);
    border-radius: 50%;
    background: var(--input-bg);
    cursor: pointer;
    position: relative;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    flex-shrink: 0;
}

input[type="radio"]:hover {
    border-color: var(--accent-primary);
}

input[type="radio"]:checked {
    border-color: var(--accent-primary);
    background: var(--gradient-primary);
}

input[type="radio"]:checked::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    background: white;
    border-radius: 50%;
}

/* 单选按钮标签选中状态 */
input[type="radio"]:checked + label,
label:has(input[type="radio"]:checked) {
    color: var(--accent-primary);
    font-weight: 600;
}

[data-theme="light"] input[type="radio"]:checked + label,
[data-theme="light"] label:has(input[type="radio"]:checked) {
    color: var(--accent-primary);
}

/* Toast 提示 */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem 2rem;
    border-radius: 1rem;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    z-index: 10002;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    color: var(--text-primary);
    font-size: 0.9375rem;
    max-width: 90%;
    text-align: center;
}

.toast.show {
    animation: toastIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes toastIn {
    0% {
        transform: translateX(-50%) translateY(-100px);
        opacity: 0;
    }
    50% {
        transform: translateX(-50%) translateY(10px);
    }
    100% {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

/* 工具栏 */
.toolbar {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    padding: 0.5rem 1rem;
    border-radius: 0.875rem;
    background: var(--nav-item-bg);
    border: 1px solid var(--nav-item-border);
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.back-link:hover {
    color: var(--accent-primary);
    background: var(--nav-item-hover);
    border-color: var(--accent-primary);
}

/* Neumorphic Inset 样式 - 用于输入区域 */
.neu-inset {
    background: var(--input-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--input-border);
    border-radius: 1rem;
    padding: 1rem;
    margin-bottom: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.neu-inset:focus-within {
    border-color: var(--input-focus);
    box-shadow: 0 0 30px var(--input-focus-glow), inset 0 0 20px var(--input-focus-glow);
}

/* 结果区域 */
.result-area {
    margin-top: 1.5rem;
}

.result-area pre {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text-primary);
    padding: 1rem;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.875rem;
}

/* 工具详情页布局 */
.tool-detail {
    max-width: 900px;
    margin: 0 auto;
}

.tool-detail-header {
    margin-bottom: 2rem;
}

.tool-detail-title {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.tool-detail-desc {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .content-area {
        padding: 1rem;
    }
    
    .page-header {
        padding-top: 4rem;
    }
    
    .category-card {
        padding: 1.5rem;
    }
    
    .category-icon {
        width: 60px;
        height: 60px;
        font-size: 1.75rem;
    }
    
    .category-name {
        font-size: 1.125rem;
    }
    
    .toolbar {
        flex-direction: column;
    }
    
    .neu-btn {
        width: 100%;
    }
    
    .theme-section {
        flex-direction: column;
        gap: 0.75rem;
    }
}