.page-content {
    max-width: 720px;
    margin: clamp(20px, 4vw, 40px) auto;
    padding: clamp(30px, 4vw, 40px) clamp(15px, 3vw, 25px) clamp(40px, 6vw, 60px);

    background: rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(8px);

    border-radius: 20px;

    box-shadow:
        0 20px 60px rgba(0,0,0,0.25),
        0 0 40px rgba(180,160,255,0.15);
}

.page-content h2 {
    text-align: left;
    margin-top: clamp(40px, 6vw, 55px);
    margin-bottom: clamp(12px, 2vw, 18px);
}

.page-content h2 span {
    position: relative;
    display: inline-block;

    padding: clamp(8px, 1.5vw, 10px) clamp(12px, 2vw, 14px) clamp(8px, 1.5vw, 10px) clamp(14px, 2.5vw, 18px);

    border-left: 6px solid #6c7cff;

    text-shadow:
        0 0 10px rgba(255,255,255,1),
        0 0 20px rgba(255,255,255,0.9),
        0 3px 8px rgba(0,0,0,0.4);

    z-index: 1;
}

.page-content h2 span::before {
    content: "";
    position: absolute;
    inset: -6px -10px;

    background: rgba(255,255,255,0.4);
    filter: blur(12px);

    border-radius: 10px;

    z-index: -1;
}

.page-content p {
    line-height: 2.2;
    color: rgba(60, 50, 50, 0.9);
}

.page-content strong {
    color: #6c7cff;
}

.point-box {
    margin: clamp(20px, 3vw, 25px) 0;
    padding: clamp(14px, 2vw, 18px) clamp(16px, 2.5vw, 20px);

    background: rgba(255,255,255,0.85);
    border-left: 4px solid #6c7cff;

    border-radius: 12px;
}

.summary-box {
    margin-top: clamp(30px, 5vw, 40px);
    padding: clamp(20px, 3vw, 25px);

    background: rgba(255,255,255,0.9);
    border-radius: 16px;
}

/* =========================
   他の通変星（洗練版）
========================= */

.related {
    margin-top: clamp(50px, 7vw, 70px);
    padding: clamp(25px, 4vw, 32px);

    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(14px);

    border-radius: 22px;

    box-shadow:
        0 2px 2px rgba(0,0,0,0.15),
        inset 0 0 30px rgba(255,255,255,0.25);
}

/* タイトル */
.related h2 {
    text-align: center;
    font-size: clamp(17px, 2.6vw, 20px);
    font-weight: 600;
    letter-spacing: 0.08em;

    color: #5b4a6f;

    margin-bottom: 28px;

    position: relative;
}
.related h2 span {
    all: unset;
}

/* タイトル下に細い光ライン */
.related h2::after {
    content: "";
    display: block;
    width: 40px;
    height: 2px;
    margin: 10px auto 0;

    background: linear-gradient(90deg, transparent, #8f9bff, transparent);
    opacity: 0.7;
}

/* グリッド */
.related ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px 18px;

    list-style: none;
    padding: 0;
}

/* カードリンク */
.related a {
    display: flex;
    align-items: center;
    justify-content: center;

    padding: 14px;

    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0.04em;

    color: #6b6cff;

    border-radius: 14px;

    background: linear-gradient(
        145deg,
        rgba(255,255,255,0.45),
        rgba(255,255,255,0.15)
    );

    backdrop-filter: blur(6px);

    box-shadow:
        0 4px 12px rgba(0,0,0,0.08),
        inset 0 0 10px rgba(255,255,255,0.2);

    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

/* ほんのり光るエフェクト */
.related a::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(255,255,255,0.6), transparent 60%);
    opacity: 0;
    transition: 0.3s;
}

/* ホバー */
.related a:hover {
    transform: translateY(-4px) scale(1.02);

    color: #4a54ff;

    box-shadow:
        0 10px 25px rgba(0,0,0,0.18),
        0 0 15px rgba(140,150,255,0.25);
}

.related a:hover::before {
    opacity: 1;
}

@media (max-width: 600px) {
    .page-content {
        margin: 20px;
    }

    .related ul {
        grid-template-columns: 1fr;
    }
}