/* 全局重置 & 字体 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #f5f7fb;
            color: #1e293b;
            line-height: 1.6;
            padding: 20px;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 44px;
            box-shadow: 0 25px 60px -18px rgba(0, 0, 0, 0.08);
            padding: 36px 30px 28px;
            transition: all 0.2s;
        }

        /* 标题区 */
        h1 {
            font-size: 2.6rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: #0b2a4a;
            border-left: 10px solid #3b82f6;
            padding-left: 28px;
            margin-bottom: 0.2rem;
        }

        .subhead {
            font-size: 1.05rem;
            color: #475569;
            padding-left: 38px;
            border-bottom: 1px solid #e6edf5;
            padding-bottom: 1.2rem;
            margin-bottom: 2.2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem 1.8rem;
        }

        .subhead .pill {
            background: #eef4ff;
            color: #1e4a7a;
            padding: 0.15rem 1.2rem;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
        }

        h2 {
            font-size: 2rem;
            font-weight: 600;
            color: #0b2a4a;
            margin-top: 2.8rem;
            margin-bottom: 1.4rem;
            border-bottom: 2px solid #e2eaf3;
            padding-bottom: 0.5rem;
        }

        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: #1a3d6b;
            margin: 1.6rem 0 0.6rem 0;
        }

        p {
            margin-bottom: 0.8rem;
            color: #2d3a4b;
        }

        /* 卡片 & 网格 */
        .card-soft {
            background: #f8fafd;
            border-radius: 28px;
            padding: 1.8rem 2rem;
            border: 1px solid #e9eff6;
            margin-bottom: 1.8rem;
        }

        .grid-2col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }

        .grid-3col {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }

        .subject-block {
            background: #ffffff;
            border-radius: 28px;
            padding: 1.6rem 1.8rem;
            border: 1px solid #e9eff6;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
            transition: all 0.15s;
        }

        .subject-block:hover {
            border-color: #bfd5f0;
            box-shadow: 0 8px 22px -10px rgba(0, 30, 70, 0.06);
        }

        .subject-block h3 {
            margin-top: 0;
            border-bottom: 2px solid #dce7f5;
            padding-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .subject-block ul {
            padding-left: 1.2rem;
            font-size: 0.95rem;
        }
        .subject-block li {
            margin-bottom: 0.15rem;
        }

        .tag {
            display: inline-block;
            background: #dce7f5;
            color: #1a3d6b;
            border-radius: 40px;
            padding: 0.15rem 1rem;
            font-size: 0.8rem;
            font-weight: 500;
            margin-right: 0.4rem;
        }

        .highlight-box {
            background: #eef4fe;
            border-radius: 28px;
            padding: 1.8rem 2.2rem;
            margin: 2rem 0 1rem;
            border-left: 6px solid #3b82f6;
        }

       
 

        /* FAQ */
        .faq-list {
            margin-top: 1.6rem;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid #e2eaf3;
            border-radius: 22px;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: box-shadow 0.15s;
        }

        .faq-item:hover {
            box-shadow: 0 6px 20px -10px rgba(0, 0, 0, 0.04);
        }

        .faq-item summary {
            font-weight: 600;
            color: #0b2a4a;
            padding: 1rem 1.8rem;
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 14px;
            background: #fafcff;
            transition: background 0.15s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::before {
            content: "❓";
            font-size: 1.2rem;
            opacity: 0.7;
        }

        .faq-item details[open] summary {
            background: #f0f6ff;
            border-bottom: 1px solid #d4e2f5;
        }

        .faq-answer {
            padding: 0.6rem 1.8rem 1.8rem 2rem;
            color: #1e2f44;
            background: #fafcff;
        }

        .faq-answer p {
            margin-bottom: 0.5rem;
        }
        .faq-answer strong {
            color: #1a4a7a;
        }

        /* 底部三句特征 */
        .feature-strip {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.8rem 2.8rem;
            margin-top: 3rem;
            padding-top: 2rem;
            border-top: 2px solid #e6edf5;
        }

        .feature-strip span {
            background: #eef4fe;
            padding: 0.3rem 2rem;
            border-radius: 60px;
            color: #1a3d6b;
            font-weight: 500;
            font-size: 1rem;
        }

        .text-small {
            font-size: 0.9rem;
            color: #567394;
        }

        /* 响应式 */
        @media (max-width: 820px) {
            .container { padding: 24px 18px; }
            h1 { font-size: 2.1rem; padding-left: 18px; }
            .subhead { padding-left: 18px; }
            .grid-2col { grid-template-columns: 1fr; }
            .grid-3col { grid-template-columns: 1fr 1fr; }
           
            .subject-block { padding: 1.2rem 1.2rem; }
        }

        @media (max-width: 540px) {
            .grid-3col { grid-template-columns: 1fr; }
           
            .container { padding: 16px 12px; border-radius: 28px; }
            h1 { font-size: 1.7rem; }
            .card-placeholder { min-height: 120px; padding: 1.2rem; }
            .faq-item summary { padding: 0.8rem 1rem; }
            .faq-answer { padding: 0.2rem 1rem 1.2rem 1rem; }
        }

        /* 表格——适合学习机会/困难对照 */
        .insight-table {
            width: 100%;
            border-collapse: collapse;
            background: #ffffff;
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
            margin: 1.2rem 0;
        }

        .insight-table th {
            background: #eef4fa;
            color: #0b2a4a;
            font-weight: 600;
            padding: 16px 14px;
            text-align: left;
            border-bottom: 2px solid #d4e0ed;
        }

        .insight-table td {
            padding: 14px 14px;
            border-bottom: 1px solid #e6edf5;
            vertical-align: top;
        }

        .insight-table tr:last-child td {
            border-bottom: none;
        }
        .insight-table .label {
            font-weight: 600;
            color: #1a3d6b;
            width: 25%;
        }