/* ============================================
           CSS Variables & Design Tokens
           ============================================ */
        :root {
            /* Colors - Warm Editorial Palette */
            --color-bg-primary: #FAF7F2;
            --color-bg-secondary: #F5F5F0;
            --color-text-primary: #2C2C2C;
            --color-text-secondary: #6B6B6B;
            --color-accent-terracotta: #C4A484;
            --color-accent-sage: #8B9A7D;
            --color-accent-classic-blue: #4A5568;
            --color-border: rgba(0, 0, 0, 0.06);
            
            /* Typography */
            --font-serif: 'Cormorant Garamond', Georgia, serif;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            
            /* Spacing - 70-20-10 Rule Implementation */
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 4rem;
            --space-xl: 8rem;
            
            /* Shadows - Paper-like softness */
            --shadow-soft: 0 10px 30px -15px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 20px 40px -20px rgba(0, 0, 0, 0.12);
            
            /* Transitions */
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        /* ============================================
           Reset & Base Styles
           ============================================ */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--color-bg-primary);
            color: var(--color-text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            position: relative;
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* Background image with overlay */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url('https://cstupic.creaconception.moe/api');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            z-index: -2;
            filter: blur(2px);
        }

        /* Overlay to blend background with theme colors */
        body::after {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(250, 247, 242, 0.7); /* Using primary background color with transparency */
            z-index: -1;
        }

        /* ============================================
           Sticky Navigation
           ============================================ */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: var(--space-sm) var(--space-lg);
            background: rgba(250, 247, 242, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: var(--transition-smooth);
        }

        .navbar.scrolled {
            background: rgba(250, 247, 242, 0.95);
            border-bottom-color: var(--color-border);
            box-shadow: var(--shadow-soft);
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-family: var(--font-serif);
            font-size: 1.5rem;
            font-weight: 600;
            letter-spacing: -0.02em;
            color: var(--color-text-primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: var(--space-xs);
        }

        .logo-mark {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--color-accent-terracotta), var(--color-accent-sage));
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 0.9rem;
        }

        .nav-links {
            display: flex;
            gap: var(--space-md);
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            font-weight: 400;
            position: relative;
            padding: var(--space-xs) 0;
            transition: var(--transition-smooth);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 1px;
            background: var(--color-accent-terracotta);
            transition: width 0.3s ease;
        }

        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--color-text-primary);
            outline: none;
        }

        .nav-links a:hover::after,
        .nav-links a:focus-visible::after {
            width: 100%;
        }

        /* Mobile Menu Toggle */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: var(--space-xs);
        }

        .menu-toggle span {
            width: 24px;
            height: 1.5px;
            background: var(--color-text-primary);
            transition: var(--transition-smooth);
        }

        /* ============================================
           Hero Section
           ============================================ */
        .hero {
            min-height: 60vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: calc(var(--space-xl) * 1.5) var(--space-md) var(--space-xl);
            position: relative;
            overflow: hidden;
        }

        .hero-content {
            opacity: 0;
            transform: translateY(30px);
            animation: fadeInUp 1s ease forwards;
        }

        .hero-subtitle {
            font-family: var(--font-sans);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.2em;
            color: var(--color-accent-terracotta);
            margin-bottom: var(--space-sm);
            font-weight: 500;
        }

        .hero-title {
            font-family: var(--font-serif);
            font-size: clamp(3rem, 8vw, 6rem);
            font-weight: 400;
            line-height: 1.1;
            color: var(--color-text-primary);
            margin-bottom: var(--space-md);
            letter-spacing: -0.03em;
        }

        .hero-title em {
            font-style: italic;
            color: var(--color-accent-sage);
        }

        .hero-description {
            font-family: var(--font-sans);
            font-size: 1.1rem;
            color: var(--color-text-secondary);
            max-width: 500px;
            line-height: 1.8;
            font-weight: 300;
        }

        /* ============================================
           Grid Navigation Section
           ============================================ */
        .navigation-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-md) var(--space-xl);
        }

        .grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-lg);
        }

        .nav-card {
            background: rgba(255, 255, 255, 0.2); /* 80% transparency */
            backdrop-filter: blur(10px); /* Blur effect */
            border-radius: 12px;
            padding: var(--space-md);
            text-decoration: none;
            color: inherit;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(0, 0, 0, 0.1); /* Adjusted border for transparency */
            box-shadow: var(--shadow-soft);
            transition: var(--transition-smooth);
            opacity: 0;
            transform: translateY(20px);
        }

        .nav-card.visible {
            opacity: 1;
            transform: translateY(0);
            transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }

        .nav-card:hover,
        .nav-card:focus-visible {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(196, 164, 132, 0.3);
            outline: none;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            background: rgba(245, 245, 240, 0.3); /* 80% transparency */
            backdrop-filter: blur(5px); /* Blur effect */
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: var(--space-sm);
            transition: var(--transition-bounce);
        }

        .nav-card:hover .card-icon,
        .nav-card:focus-visible .card-icon {
            transform: scale(1.1) rotate(-5deg);
            background: var(--color-accent-terracotta);
            color: white;
        }

        .card-domain {
            font-family: var(--font-sans);
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--color-accent-terracotta);
            margin-bottom: var(--space-xs);
            font-weight: 500;
        }

        .card-title {
            font-family: var(--font-serif);
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: var(--space-xs);
            color: var(--color-text-primary);
        }

        .card-description {
            font-size: 0.9rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            font-weight: 300;
        }

        .card-arrow {
            position: absolute;
            top: var(--space-md);
            right: var(--space-md);
            opacity: 0;
            transform: translateX(-10px);
            transition: var(--transition-smooth);
            color: var(--color-accent-terracotta);
        }

        .nav-card:hover .card-arrow,
        .nav-card:focus-visible .card-arrow {
            opacity: 1;
            transform: translateX(0);
        }

        /* ============================================
           Footer
           ============================================ */
        .footer {
            border-top: 1px solid var(--color-border);
            padding: var(--space-lg) var(--space-md);
            background: rgba(245, 245, 240, 0.2); /* 80% transparency */
            backdrop-filter: blur(10px); /* Blur effect */
        }

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

        .footer-info {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
        }

        .social-links {
            display: flex;
            gap: var(--space-sm);
        }

        .social-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            color: var(--color-text-secondary);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.2); /* 80% transparency */
            backdrop-filter: blur(5px); /* Blur effect */
        }

        .social-icon::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--color-accent-terracotta);
            transform: scale(0);
            transition: transform 0.3s ease;
            border-radius: 50%;
        }

        .social-icon:hover,
        .social-icon:focus-visible {
            color: white;
            border-color: var(--color-accent-terracotta);
            outline: none;
        }

        .social-icon:hover::before,
        .social-icon:focus-visible::before {
            transform: scale(1);
        }

        .social-icon svg {
            width: 18px;
            height: 18px;
            position: relative;
            z-index: 1;
            fill: currentColor;
        }

        /* ============================================
           Animations
           ============================================ */
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Staggered animation delays for cards */
        .nav-card:nth-child(1) { transition-delay: 0.1s; }
        .nav-card:nth-child(2) { transition-delay: 0.2s; }
        .nav-card:nth-child(3) { transition-delay: 0.3s; }
        .nav-card:nth-child(4) { transition-delay: 0.4s; }
        .nav-card:nth-child(5) { transition-delay: 0.5s; }
        .nav-card:nth-child(6) { transition-delay: 0.6s; }

        /* ============================================
           Responsive Design
           ============================================ */
        @media (max-width: 768px) {
            .navbar {
                padding: var(--space-sm);
            }

            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--color-bg-primary);
                flex-direction: column;
                padding: var(--space-md);
                border-bottom: 1px solid var(--color-border);
                gap: var(--space-sm);
            }

            .nav-links.active {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .hero {
                min-height: 50vh;
                padding-top: calc(var(--space-xl));
            }

            .hero-title {
                font-size: 2.5rem;
            }

            .grid-container {
                grid-template-columns: 1fr;
                gap: var(--space-sm);
            }

            .footer-content {
                flex-direction: column;
                text-align: center;
            }
        }

        /* Focus visible styles for accessibility */
        *:focus-visible {
            outline: 2px solid var(--color-accent-terracotta);
            outline-offset: 2px;
        }

        /* Reduced motion */
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* ============================================
           Other Styles
           ============================================ */

        a, a:link, a:visited, a:hover, a:active, a:focus {
            color: inherit;
        }

        .redirect {
            transition: color 0.3s ease; /* 渐变动画 */
        }

        .redirect:hover {
            color: #C4A484; /* 悬停颜色 */
        }