:root {
            --bg-app: #f5f5f7;
            --bg-card: #ffffff;
            --bg-nav: rgba(253, 253, 253, 0.8);
            --text-primary: #1d1d1f;
            --text-secondary: #86868b;
            --text-tertiary: #d1d1d6;
            --border-color: rgba(0, 0, 0, 0.04);
            --shadow-card: 0 2px 8px -2px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 12px 24px -8px rgba(0, 0, 0, 0.1);
            --radius: 16px;
            --transition: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
            background-color: var(--bg-app);
            color: var(--text-primary);
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 48px;
            background: var(--bg-nav);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            border-bottom: 0.5px solid rgba(0, 0, 0, 0.05);
        }

        .nav-container {
            max-width: 1200px;
            height: 100%;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .nav-brand {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-dot {
            width: 6px;
            height: 6px;
            background: #0071e3;
            border-radius: 50%;
        }

        .nav-links {
            display: flex;
            gap: 12px;
            list-style: none;
        }

.nav-links a {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    letter-spacing: 0.02em;
    padding: 4px 10px;
    border-radius: 100px;
    border: 1px solid rgba(0, 0, 0, 0.04);
    background: transparent; 
}

.nav-links a:hover {
    color: var(--text-primary);
    background-color: rgba(0, 0, 0, 0.03); 
    border-color: rgba(0, 0, 0, 0.08); 
}
        main {
            padding-top: 48px;
        }

        .colors-section {
            padding: 60px 24px 60px;
    max-width: 1200px;
            margin: 0 auto;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 2.5rem; 
            font-weight: 700;
            letter-spacing: -0.03em;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            font-weight: 400;
            letter-spacing: 0.01em;
        }

        .colors-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 22px; 
        }
        .color-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            cursor: pointer;
            transition: all var(--transition);
            position: relative;
            opacity: 0;
            transform: translateY(10px);
            border: 0.5px solid var(--border-color);
        }

        .color-card.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .color-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 0, 0, 0.08);
        }

        .color-preview {
            height: 100px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            transition: transform 0.6s cubic-bezier(0.25, 0.1, 0.25, 1);
        }
        
        .color-card:hover .color-preview {
            transform: scale(1.02);
        }

        .color-content {
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .color-header {
            display: flex;
            justify-content: space-between;
            align-items: baseline;
        }

        .color-name {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .color-pinyin {
            font-size: 0.625rem;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            font-weight: 500;
        }

        .color-hex {
            font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Mono", monospace;
            font-size: 0.6875rem;
            color: var(--text-secondary);
            background: rgba(0, 0, 0, 0.03);
            padding: 4px 8px;
            border-radius: 4px;
            align-self: flex-start;
            transition: background var(--transition);
        }

        .color-card:hover .color-hex {
            background: rgba(0, 0, 0, 0.06);
        }
        .intro-section {
            background: #fff;
            border-top: 1px solid rgba(0, 0, 0, 0.04);
        }

        .intro-container {
    padding: 60px 24px 60px;
    max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 80px;
            align-items: start;
        }

        .intro-label {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 16px;
        }

        .intro-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .intro-content p {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-weight: 400;
        }
        footer {
            background: var(--bg-app);
            padding: 24px;
    max-width: 1200px;
    margin: 0 auto;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        .footer-text {
            font-size: 0.75rem;
            color: var(--text-tertiary);
            font-weight: 500;
        }

        .footer-links {
            display: flex;
            gap: 24px;
        }

        .footer-links a {
            font-size: 0.75rem;
            color: var(--text-tertiary);
            text-decoration: none;
            transition: color var(--transition);
            font-weight: 500;
        }

        .footer-links a:hover {
            color: var(--text-primary);
        }
        .toast {
            white-space: nowrap;
            position: fixed;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%) translateY(20px);
            background: #1d1d1f;
            color: #fff;
            padding: 10px 20px;
            border-radius: 100px;
            font-size: 0.8125rem;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            opacity: 0;
            transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
            z-index: 2000;
            pointer-events: none;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }

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

        .toast-icon {
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #34c759;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .toast-icon::after {
            content: "";
            width: 3px;
            height: 6px;
            border: 1.5px solid #fff;
            border-top: none;
            border-left: none;
            transform: rotate(45deg) translateY(-0.5px);
        }
        @media (max-width: 1024px) {
            .intro-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
/*            .nav-links {
                display: none;
            }*/

            .colors-section, .intro-section,.nav-container,footer {
                padding-left: 10px;
                padding-right: 10px;
            }
        
.intro-container {
    padding: 60px 0px 60px;
}

            .colors-grid {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
                gap: 20px;
            }

            .color-preview {
                height: 80px;
            }

            .color-content {
                padding: 12px;
            }

            .color-name {
                font-size: 0.875rem;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }
        
.tools-module {
    text-align: center;
    margin-bottom: 48px;
}

.tools-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.tools-divider::before,
.tools-divider::after {
    content: '';
    flex: 1;
    max-width: 80px;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(0, 0, 0, 0.06), transparent);
}

.tools-title {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 0 16px;
}

.tools-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
}

.tool-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.7);
    border-radius: 100px;
    border: 0.5px solid rgba(0, 0, 0, 0.04);
    text-decoration: none;
    transition: all 0.3s ease;
    letter-spacing: 0.01em;
}

.tool-tag:hover {
    color: var(--text-primary);
    background: var(--bg-card);
    border-color: rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.tool-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

@media (max-width: 768px) {
    .tools-module {
        margin-bottom: 40px;
    }
    
    .tools-divider::before,
    .tools-divider::after {
        max-width: 40px;
    }
    
    .tools-cloud {
        gap: 6px;
    }
    
    .tool-tag {
        padding: 5px 12px;
        font-size: 0.6875rem;
    }
}