.tubc-hero {
        background: linear-gradient(120deg, #07188f 0%, #370ca2 55%, #4172ff 100%);
        color: #fff;
        padding: 3rem 0 4rem;
        position: relative;
        overflow: hidden;
    }
    .tubc-hero::after {
        content: "";
        position: absolute;
        inset: 0;
        background-image: radial-gradient(circle at 15% 20%, rgba(255,255,255,.12) 0, transparent 45%),
                          radial-gradient(circle at 85% 30%, rgba(255,255,255,.10) 0, transparent 40%);
        pointer-events: none;
    }
    .tubc-hero h1 {
        font-size: 2.3rem;
        font-weight: 800;
        line-height: 1.15;
        margin-bottom: 1rem;
    }
    .tubc-hero p.lead { font-size: 1.15rem; opacity: .92; max-width: 760px; }
    .tubc-stats { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.75rem; }
    .tubc-stat {
        background: rgba(255,255,255,.12);
        border: 1px solid rgba(255,255,255,.18);
        border-radius: var(--border-radius-lg);
        padding: .85rem 1.4rem;
        backdrop-filter: blur(4px);
    }
    .tubc-stat strong { display: block; font-size: 1.6rem; font-weight: 800; line-height: 1; }
    .tubc-stat span { font-size: .85rem; opacity: .9; }

    /* Sticky continent quick-nav */
    .tubc-nav {
        position: sticky;
        top: 0;
        z-index: 20;
        background: #fff;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--box-shadow-sm);
    }
    .tubc-nav .container { display: flex; gap: .5rem; overflow-x: auto; padding: .65rem 1rem; }
    .tubc-nav a {
        flex: 0 0 auto;
        text-decoration: none;
        font-weight: 600;
        font-size: .85rem;
        color: var(--gray-700);
        padding: .4rem .9rem;
        border-radius: 999px;
        background: var(--gray-100);
        transition: var(--transition);
        white-space: nowrap;
    }
    .tubc-nav a:hover { background: var(--primary-color); color: #fff; }

    .tubc-wrap { margin-top: -3.5rem; position: relative; z-index: 5; }

    .continent-card {
        background: #fff;
        border-radius: var(--border-radius-lg);
        box-shadow: var(--box-shadow);
        overflow: hidden;
        margin-bottom: 2rem;
        scroll-margin-top: 70px;
    }
    .continent-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
        padding: 1.25rem 1.5rem;
        background: linear-gradient(135deg, var(--gray-100), #fff);
        border-bottom: 1px solid var(--gray-200);
    }
    .continent-head h2 { font-size: 1.4rem; font-weight: 700; margin: 0; }
    .continent-head h2 i { color: var(--primary-color); margin-right: .55rem; }
    .continent-head .badge-soft {
        font-size: .78rem;
        font-weight: 600;
        color: var(--primary-color);
        background: rgba(0,25,140,.08);
        padding: .35rem .75rem;
        border-radius: 999px;
    }
    .continent-head .view-all {
        font-size: .85rem;
        font-weight: 600;
        text-decoration: none;
        color: var(--accent-color);
        white-space: nowrap;
    }
    .continent-head .view-all:hover { text-decoration: underline; }

    .country-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
        gap: .5rem;
        padding: 1.25rem 1.5rem 1.5rem;
    }
    .country-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: .5rem;
        text-decoration: none;
        color: var(--gray-800);
        font-weight: 500;
        font-size: .92rem;
        padding: .55rem .75rem;
        border-radius: var(--border-radius);
        border: 1px solid var(--gray-200);
        transition: var(--transition);
        background: #fff;
    }
    .country-link:hover {
        border-color: var(--primary-color);
        color: var(--primary-color);
        transform: translateY(-2px);
        box-shadow: var(--box-shadow-sm);
    }
    .country-link .c-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .country-link .c-arrow {
        flex: 0 0 auto;
        font-size: .7rem;
        color: var(--gray-400);
        transition: var(--transition);
    }
    .country-link:hover .c-arrow { color: var(--primary-color); transform: translateX(2px); }

    @media (max-width: 575.98px) {
        .tubc-hero h1 { font-size: 1.9rem; }
        .continent-head { flex-direction: column; align-items: flex-start; }
    }