:root {
    --primary: #6366f1;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --accent: #ec4899;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', 'Noto Sans TC', sans-serif;
    background-color: var(--bg);
    color: var(--text-dark);
    line-height: 1.7;
    margin: 0;
    padding: 40px 20px;
    min-height: 100vh;
}

.container { max-width: 900px; margin: 0 auto; }

.btn-back {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 700;
    margin-bottom: 24px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}
.btn-back:hover { transform: translateX(-4px); background: #4f46e5; }

.card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 40px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
    border: 1px solid #e2e8f0;
}

h3 { color: var(--primary); margin-top: 0; font-size: 1.5rem; }

.section-title {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
    margin-bottom: 8px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
}

.content-area {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid #f1f5f9;
}
.content-area:last-child { border: 0; margin: 0; padding: 0; }

a { color: var(--primary); text-decoration: none; font-weight: 600; border-bottom: 2px solid rgba(99, 102, 241, 0.2); }
a:hover { border-bottom-color: var(--primary); }

.pre-wrap {
    white-space: pre-wrap;
    word-wrap: break-word;
    background: #f8fafc;
    padding: 20px;
    border-radius: 16px;
    font-family: inherit;
    border: 1px solid #e2e8f0;
}

.model-badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: 24px;
    font-size: 0.9rem;
    font-weight: 700;
}

.appendix { font-size: 0.95rem; color: var(--text-light); }

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--success, #10b981);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.9rem;
    margin-top: 15px;
    box-shadow: 0 4px 6px -1px rgba(16, 185, 129, 0.2);
    transition: transform 0.2s, background 0.2s;
}
.btn-download:hover { background: #059669; transform: translateY(-2px); }