* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Inter", sans-serif;
    background: #eef2f7;
}

.about-rank-page {
    max-width: 640px;
    margin: 0 auto;
    min-height: 100vh;
    padding: 12px 14px 22px;
}

.about-rank-topbar {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid #d5dce5;
    border-radius: 12px;
    padding: 12px 14px;
    margin-bottom: 14px;
}

.about-rank-back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: #111827;
    text-decoration: none;
    font-size: 22px;
}

.about-rank-topbar h1 {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    color: #111827;
}

.about-rank-card {
    border: 1px solid #d8dfeb;
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
}

.about-rank-header {
    background: #cf1f3a;
    color: #fff;
    font-size: 38px;
    font-weight: 800;
    line-height: 1.15;
    padding: 22px 24px;
    letter-spacing: 0.2px;
}

.about-rank-body {
    background: #0d318d;
    color: #f5f8ff;
    padding: 28px 24px 26px;
}

.about-rank-tier {
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 12px;
}

.about-rank-body p {
    margin-bottom: 8px;
    font-size: 24px;
    line-height: 1.35;
    color: #eef4ff;
}

.about-rank-body strong {
    color: #ffffff;
    font-weight: 800;
}

.about-rank-note {
    font-size: 21px;
    opacity: 0.95;
}

@media (max-width: 576px) {
    .about-rank-header {
        font-size: 30px;
        padding: 18px 16px;
    }

    .about-rank-body {
        padding: 20px 16px;
    }

    .about-rank-tier {
        font-size: 33px;
    }

    .about-rank-body p {
        font-size: 18px;
    }
}