/* --- ▼▼▼ Aboutページ専用のスタイル ▼▼▼ --- */
/* 共通スタイルは /css/style.css から読み込まれます */
.about-main {
    padding-top: 140px;
    padding-bottom: 100px;
    min-height: calc(100vh - 350px);
    display: flex;
    justify-content: center;
    align-items: center;
}

.content-wrapper {
    max-width: 900px;
    text-align: center;
    padding: 0 20px;
}

.content-wrapper h1 {
    font-size: 3.5em;
    font-weight: 900;
    margin-bottom: 40px;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #1a1a1a 0%, #4a4a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-wrapper p:not(.subtitle) {
    font-size: 1.2em;
    line-height: 1.8;
    text-align: left;
    margin-bottom: 20px;
}

/* セクション分けスタイル */
.about-section {
    margin-bottom: 50px;
    padding: 50px 35px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 16px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-top: 4px solid transparent;
    position: relative;
    overflow: hidden;
}

.about-section:hover {
    transform: translateY(-12px) scale(1.01);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.section-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.section-icon {
    font-size: 3em;
    line-height: 1;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s;
}

.about-section:hover .section-icon {
    transform: scale(1.1) rotate(5deg);
}

.section-header h2 {
    font-size: 2em;
    margin: 0;
    color: #1a1a1a;
    font-weight: 700;
    letter-spacing: 1px;
    border-bottom: none;
    padding-bottom: 0;
    flex: 1;
}

.about-section p {
    color: #555;
    margin: 0;
    font-size: 1.15em;
    line-height: 1.8;
}

/* セクションごとのアクセントカラー（オプション） */
.about-overview { border-top-color: #4A90E2; }
.about-background { border-top-color: #F5A623; }
.about-vision { border-top-color: #7ED321; }
.about-technology { border-top-color: #BD10E0; }
.about-team { border-top-color: #E24A4A; }

@media (max-width: 768px) {
    .about-main {
        padding-top: 100px;
        padding-bottom: 60px;
    }

    .content-wrapper {
        padding: 0 15px;
    }

    .content-wrapper h1 {
        font-size: 2.5em;
        letter-spacing: 1px;
        margin-bottom: 30px;
    }

    .subtitle {
        font-size: 1.1em;
        margin-bottom: 50px;
    }

    .about-section {
        padding: 35px 20px;
        margin-bottom: 35px;
    }

    .section-icon {
        font-size: 2.2em;
    }

    .section-header h2 {
        font-size: 1.6em;
    }

    .about-section p {
        font-size: 1.1em;
    }
}

@media (max-width: 480px) {
    .about-main {
        padding-top: 90px;
        padding-bottom: 50px;
    }

    .content-wrapper h1 {
        font-size: 2em;
        margin-bottom: 20px;
    }

    .subtitle {
        font-size: 1em;
        margin-bottom: 40px;
    }

    .about-section {
        padding: 30px 15px;
        margin-bottom: 30px;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .section-icon {
        font-size: 2em;
    }

    .section-header h2 {
        font-size: 1.4em;
    }

    .about-section p {
        font-size: 1.05em;
        line-height: 1.7;
    }

    .mission-list li {
        font-size: 1em;
        margin-bottom: 20px;
    }
}

/* geometric-background は削除されました（base.css の固定背景を使用） */