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

        body {
            background: linear-gradient(145deg, #f0f4fc 0%, #e6edf5 100%);
            font-family: 'Segoe UI', 'Roboto', 'Poppins', system-ui, -apple-system, sans-serif;
            padding: 1.5rem;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .container {
            max-width: 900px;
            width: 100%;
            margin: 0 auto;
        }

        /* 卡片样式 */
        .intro-card, .test-card, .result-card {
            background: white;
            border-radius: 2rem;
            box-shadow: 0 20px 35px -12px rgba(0, 0, 0, 0.15);
            overflow: hidden;
            padding: 2rem 2rem;
            transition: all 0.2s;
        }

        /* 介绍页面SEO优化 */
        .intro-card h1 {
            font-size: 2.2rem;
            background: linear-gradient(135deg, #1e3c72, #3a6ea5);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 0.5rem;
        }
        .intro-sub {
            color: #4a627a;
            border-bottom: 1px solid #e2edf7;
            display: inline-block;
            padding-bottom: 0.3rem;
            margin-bottom: 1.5rem;
            font-weight: 500;
        }
        .section-title {
            font-size: 1.4rem;
            font-weight: 700;
            color: #1e3c72;
            margin: 1.2rem 0 0.8rem 0;
            border-left: 4px solid #2b6cb0;
            padding-left: 1rem;
        }
        .theory-box, .dimension-box, .faq-item {
            background: #f8fafc;
            border-radius: 1.2rem;
            padding: 1rem 1.2rem;
            margin: 1rem 0;
            line-height: 1.6;
            color: #2c3e50;
        }
        .theory-box p, .dimension-box p {
            font-size: 0.95rem;
        }
        .dimension-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin: 1rem 0;
        }
        .dimension-card {
            flex: 1;
            min-width: 180px;
            background: #eef2ff;
            border-radius: 1.2rem;
            padding: 0.8rem;
            text-align: center;
        }
        .dimension-card strong {
            font-size: 1.2rem;
            color: #1e3c72;
        }
        .benefits-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            margin: 1rem 0;
        }
        .benefit-item {
            background: #eef2ff;
            border-radius: 2rem;
            padding: 0.5rem 1rem;
            font-size: 0.85rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .start-btn {
            background: linear-gradient(100deg, #1e3c72, #2b4c7c);
            border: none;
            color: white;
            font-weight: 700;
            font-size: 1.2rem;
            padding: 0.9rem 2rem;
            border-radius: 60px;
            cursor: pointer;
            margin: 1.5rem 0 1rem;
            width: 100%;
            max-width: 300px;
            transition: 0.2s;
            box-shadow: 0 6px 14px rgba(0,0,0,0.1);
            display: block;
            margin-left: auto;
            margin-right: auto;
        }
        .start-btn:hover {
            transform: scale(0.98);
            background: linear-gradient(100deg, #15355e, #1f3f66);
        }
        details {
            margin: 0.8rem 0;
            border-radius: 1rem;
            background: #ffffff;
            border: 1px solid #e2edf7;
        }
        summary {
            font-weight: 600;
            padding: 0.8rem 1rem;
            cursor: pointer;
            color: #1e3c72;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        summary::-webkit-details-marker {
            display: none;
        }
        summary:before {
            content: "▶";
            font-size: 0.8rem;
            transition: transform 0.2s;
            color: #2b6cb0;
        }
        details[open] summary:before {
            transform: rotate(90deg);
        }
        .faq-answer {
            padding: 0 1rem 1rem 1rem;
            color: #4a627a;
            line-height: 1.6;
            border-top: 1px solid #eef2ff;
        }
        footer {
            text-align: center;
            margin-top: 1.5rem;
            font-size: 0.75rem;
            color: #6c7a8e;
        }
        /* 测试卡片样式 (与之前一致，略作保留) */
        .test-card { display: none; }
        .hero { text-align: center; margin-bottom: 1.5rem; }
        .hero h2 { font-size: 1.6rem; color: #1e3c72; }
        .progress-area { margin-bottom: 1.8rem; }
        .progress-meta { display: flex; justify-content: space-between; font-size: 0.85rem; font-weight: 500; margin-bottom: 8px; }
        .progress-bar-bg { background: #e2e8f0; border-radius: 20px; height: 8px; overflow: hidden; }
        .progress-fill { width: 0%; height: 100%; background: linear-gradient(90deg, #3b82f6, #2563eb); border-radius: 20px; transition: width 0.25s ease; }
        .question-section { margin: 1rem 0 1.5rem; }
        .q-text { font-size: 1.25rem; font-weight: 600; color: #0f2b3f; line-height: 1.4; margin-bottom: 1.8rem; }
        .options-list { display: flex; flex-direction: column; gap: 0.9rem; }
        .option-btn { background: #f8fafc; border: 1.5px solid #e2edf7; border-radius: 1.5rem; padding: 1rem 1.2rem; font-size: 1rem; font-weight: 500; text-align: left; cursor: pointer; display: flex; align-items: center; gap: 0.8rem; }
        .option-btn:hover { background: #eff6ff; border-color: #b9d3f8; }
        .option-prefix { font-weight: 700; background: #eef2ff; width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; border-radius: 60px; color: #2563eb; }
        .selected-option { background: #e0f2fe; border-color: #3b82f6; box-shadow: 0 2px 6px rgba(59,130,246,0.2); }
        .nav-buttons { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2rem; }
        .nav-btn { background: white; border: 1px solid #cbd5e1; padding: 0.7rem 1.2rem; border-radius: 40px; font-weight: 600; cursor: pointer; flex: 1; text-align: center; }
        .nav-btn-primary { background: #1e3c72; border: none; color: white; }
        .reset-link { text-align: center; margin-top: 1.2rem; }
        .reset-link button { background: none; border: none; color: #6c86a3; text-decoration: underline; cursor: pointer; font-size: 0.8rem; }
        .result-card { display: none; animation: fadeUp 0.4s ease; background: white; border-radius: 2rem; padding: 1.8rem; }
        @keyframes fadeUp { from { opacity: 0; transform: translateY(20px);} to { opacity: 1; transform: translateY(0);} }
        .result-header { text-align: center; border-bottom: 2px solid #eef2ff; padding-bottom: 1rem; margin-bottom: 1.5rem; }
        .result-type { font-size: 2rem; font-weight: 800; background: linear-gradient(135deg, #1e3c72, #3a6ea5); -webkit-background-clip: text; background-clip: text; color: transparent; }
        .scores-grid { display: flex; flex-wrap: wrap; gap: 1rem; margin: 1.5rem 0; }
        .score-item { flex: 1; min-width: 100px; background: #f8fafc; border-radius: 1.2rem; padding: 0.8rem; text-align: center; }
        .score-letter { font-size: 1.4rem; font-weight: 800; }
        .score-bar-container { background: #e2e8f0; border-radius: 20px; height: 8px; margin: 0.5rem 0; }
        .score-bar { height: 8px; border-radius: 20px; width: 0%; }
        .desc-text { background: #fefce8; padding: 1rem; border-radius: 1rem; line-height: 1.6; margin: 1rem 0; }
        .share-buttons { display: flex; gap: 1rem; margin-top: 1.5rem; flex-wrap: wrap; }
        .share-btn { background: #eef2ff; border: none; padding: 0.6rem 1.2rem; border-radius: 40px; font-weight: 600; display: inline-flex; align-items: center; gap: 0.5rem; cursor: pointer; }
        .btn-restart { background: white; border: 1px solid #2b6cb0; color: #2b6cb0; padding: 0.6rem 1.5rem; border-radius: 40px; font-weight: 600; cursor: pointer; margin-top: 1rem; width: 100%; }
        .toast-msg { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: #1f2937; color: white; padding: 8px 18px; border-radius: 40px; font-size: 0.8rem; z-index: 1000; opacity: 0; transition: opacity 0.2s; pointer-events: none; }
        @media (max-width: 600px) {
            body { padding: 1rem; }
            .intro-card, .test-card, .result-card { padding: 1.2rem; }
            .q-text { font-size: 1.1rem; }
            .section-title { font-size: 1.2rem; }
        }