* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Segoe UI', 'Inter', system-ui, sans-serif; }
    body { background: #f0f4fa; color: #1e293b; min-height: 100vh; }

    /* ---------- hero ---------- */
    .hero {
        max-width: 1100px; margin: 0 auto; padding: 60px 30px 20px; text-align: center;
    }
    .hero-eyebrow {
        display: inline-block; font-size: 0.85rem; font-weight: 700; letter-spacing: .08em;
        text-transform: uppercase; color: #2563eb; background: #e2edff;
        padding: 6px 16px; border-radius: 30px; margin-bottom: 18px;
    }
    .hero h1 {
        font-size: clamp(1.9rem, 4vw, 2.7rem); color: #0b2b4a; line-height: 1.2; margin-bottom: 18px;
    }
    .hero p {
        font-size: 1.1rem; color: #3a5578; max-width: 700px; margin: 0 auto 10px; line-height: 1.6;
    }

    .stats-row {
        display: flex; justify-content: center; gap: 40px; flex-wrap: wrap;
        margin: 34px 0 10px;
    }
    .stat { text-align: center; }
    .stat b { display: block; font-size: 2rem; color: #2563eb; }
    .stat span { font-size: 0.9rem; color: #5b7599; }

    /* ---------- toc ---------- */
    .toc {
        max-width: 1100px; margin: 30px auto 0; padding: 0 30px;
        display: flex; gap: 10px; flex-wrap: wrap; justify-content: center;
    }
    .toc a {
        text-decoration: none; font-weight: 600; font-size: 0.92rem; color: #11315b;
        background: #fff; border: 1px solid #d7e3f7; padding: 9px 18px; border-radius: 30px;
        transition: 0.15s;
    }
    .toc a:hover { background: #2563eb; color: #fff; border-color: #2563eb; }

    /* ---------- sections ---------- */
    .main { max-width: 1100px; margin: 0 auto; padding: 20px 30px 80px; }
    .section { margin-top: 64px; scroll-margin-top: 90px; }
    .section-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 8px; flex-wrap: wrap; }
    .section-head h2 { font-size: 1.5rem; color: #0b2b4a; }
    .section-head .count { font-size: 0.9rem; color: #7a92b5; font-weight: 600; }
    .section-desc { color: #4a6180; margin-bottom: 26px; max-width: 750px; line-height: 1.55; }

    .tool-grid {
        display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 16px;
    }
    .tool-card {
        display: block; background: #fff; border: 1px solid #dfe8f5; border-radius: 20px;
        padding: 22px 24px; text-decoration: none; color: inherit; transition: 0.15s;
        position: relative;
    }
    .tool-card:hover { border-color: #2563eb; box-shadow: 0 10px 24px -8px rgba(37,99,235,0.25); transform: translateY(-2px); }
    .tool-name {
        font-size: 1.05rem; font-weight: 700; color: #12335e; margin-bottom: 6px;
        display: flex; align-items: center; justify-content: space-between; gap: 8px;
    }
    .tool-name svg { width: 16px; height: 16px; stroke: #94a9c9; flex-shrink: 0; transition: 0.15s; }
    .tool-card:hover .tool-name svg { stroke: #2563eb; transform: translateX(2px); }
    .tool-desc { font-size: 0.9rem; color: #5c7295; line-height: 1.5; }
    .tool-badge {
        display: inline-block; font-size: 0.7rem; font-weight: 700; letter-spacing: .04em;
        text-transform: uppercase; color: #2563eb; background: #eaf1ff; padding: 3px 9px;
        border-radius: 20px; margin-top: 10px;
    }

    /* ---------- faq ---------- */
    .faq { margin-top: 70px; }
    .faq h2 { font-size: 1.5rem; color: #0b2b4a; margin-bottom: 22px; }
    .faq-item { background: #fff; border: 1px solid #dfe8f5; border-radius: 18px; padding: 20px 24px; margin-bottom: 12px; }
    .faq-item h3 { font-size: 1rem; color: #12335e; margin-bottom: 8px; }
    .faq-item p { font-size: 0.92rem; color: #4a6180; line-height: 1.55; }

    .footer { text-align: center; padding: 40px 20px; color: #7688a3; font-size: 0.88rem; }

    @media (max-width: 640px) {
        .hero { padding: 40px 18px 10px; }
        .main { padding: 10px 18px 60px; }
        .stats-row { gap: 24px; }
    }