:root {
            --primary-hue: 16;
            --primary: hsl(var(--primary-hue) 65% 58%);
            --primary-light: hsl(var(--primary-hue) 60% 68%);
            --primary-dark: hsl(var(--primary-hue) 70% 45%);
            --accent-hue: 38;
            --accent: hsl(var(--accent-hue) 85% 55%);
            --bg-base: #FEFDFB;
            --bg-card: #FFFFFF;
            --text-primary: #2D2A26;
            --text-secondary: #6B6560;
            --text-muted: #9A948C;
            --border-subtle: #EDE8E3;
            --border-medium: #DFD8D0;
            --shadow-sm: 0 1px 3px rgba(45, 42, 38, 0.06);
            --shadow-md: 0 4px 12px rgba(45, 42, 38, 0.08);
            --shadow-lg: 0 8px 24px rgba(45, 42, 38, 0.10);
            --radius-md: 12px;
            --radius-lg: 16px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            background: var(--bg-base);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            background-image: radial-gradient(circle at 1px 1px, var(--border-subtle) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        /* Hero */
        .hero {
            text-align: center;
            padding: 4rem 1rem 3rem;
            position: relative;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--accent), var(--primary), transparent);
            border-radius: 2px;
        }
        .hero-badge {
            display: inline-block;
            font-size: 0.8rem;
            color: var(--accent);
            background: hsl(var(--accent-hue) 80% 95%);
            border: 1px solid hsl(var(--accent-hue) 60% 85%);
            padding: 4px 16px;
            border-radius: 20px;
            margin-bottom: 1rem;
            letter-spacing: 0.1em;
            font-weight: 600;
        }
        .hero h1 {
            font-family: 'Noto Serif SC', serif;
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 0.75rem;
        }
         .hero p {
             color: var(--text-secondary);
             font-size: 1.05rem;
             max-width: 500px;
             margin: 0 auto;
             word-break: keep-all;
             overflow-wrap: normal;
             text-wrap: pretty;
        }
        /* Grid */
        .container {
            max-width: 960px;
            margin: 0 auto;
            padding: 2.5rem 1rem 3rem;
        }
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.25rem;
        }
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.3s;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: hsl(var(--primary-hue) 50% 85%);
        }
        .card:hover::before { opacity: 1; }
        .card-num {
            font-family: 'JetBrains Mono', monospace;
            font-size: 0.7rem;
            color: var(--primary);
            font-weight: 600;
            letter-spacing: 0.1em;
            margin-bottom: 0.5rem;
        }
        .card h2 {
            font-family: 'Noto Serif SC', serif;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
         .card p {
             font-size: 0.85rem;
             color: var(--text-secondary);
             line-height: 1.6;
             flex: 1;
             word-break: keep-all;
             overflow-wrap: normal;
             text-wrap: pretty;
         }
        .card-meta {
            margin-top: 0.75rem;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .card-emoji {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }
        /* 达特茅斯 special card */
        .card-extra {
            background: linear-gradient(135deg, hsl(var(--primary-hue) 60% 97%) 0%, hsl(var(--accent-hue) 80% 97%) 100%);
            border: 1px solid hsl(var(--primary-hue) 50% 85%);
        }
        .card-extra:hover {
            border-color: var(--primary);
        }
        /* Footer */
        .footer {
            text-align: center;
            padding: 2rem 1rem;
            border-top: 1px solid var(--border-subtle);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        @media (max-width: 600px) {
            .grid { grid-template-columns: 1fr; }
            .hero { padding: 3rem 1rem 2rem; }
        }