.hero-section {
    position: relative;
    width: 100%;
    overflow: hidden;
    height: calc(100vh - 4.5rem);
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    margin-top: -1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 0;
    background: radial-gradient(circle at center, #111526 0%, #070913 100%);
    box-shadow: inset 0 0 50px rgba(0, 0, 0, 0.5);
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
}

.hero-title {
    font-family: var(--font-title);
    font-size: 6rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--primary-color), var(--accent-purple));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 243, 255, 0.3);
    letter-spacing: 6px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-sub);
    letter-spacing: 8px; 
    margin-bottom: 3rem;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.neon-btn, .neon-btn-outline {
    padding: 12px 36px;
}

/* --- ネオンバブルのアニメーション --- */
.neon-bubbles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.bubble {
    position: absolute;
    bottom: -150px;
    border-radius: 50%;
    backdrop-filter: blur(4px);
    animation: floatUp 15s infinite ease-in-out;
    opacity: 0;
}

.b-cyan {
    border: 1px solid rgba(0, 243, 255, 0.5);
    background: radial-gradient(circle at 30% 30%, rgba(0, 243, 255, 0.1), transparent);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.2), inset 0 0 20px rgba(0, 243, 255, 0.2);
}

.b-purple {
    border: 1px solid rgba(176, 38, 255, 0.5);
    background: radial-gradient(circle at 30% 30%, rgba(176, 38, 255, 0.1), transparent);
    box-shadow: 0 0 15px rgba(176, 38, 255, 0.2), inset 0 0 20px rgba(176, 38, 255, 0.2);
}

.b-pink {
    border: 1px solid rgba(255, 0, 127, 0.5);
    background: radial-gradient(circle at 30% 30%, rgba(255, 0, 127, 0.1), transparent);
    box-shadow: 0 0 15px rgba(255, 0, 127, 0.2), inset 0 0 20px rgba(255, 0, 127, 0.2);
}

.size-l {
    width: 120px;
    height: 120px;
}

.size-m {
    width: 80px;
    height: 80px;
}

.size-s {
    width: 40px;
    height: 40px;
}

.bubble:nth-child(1) {
    left: 10%;
    animation-duration: 18s;
}

.bubble:nth-child(2) {
    left: 25%;
    animation-duration: 22s;
    animation-name: floatUpAlt;
}

.bubble:nth-child(3) {
    left: 45%;
    animation-duration: 15s;
}

.bubble:nth-child(4) {
    left: 60%;
    animation-duration: 25s;
    animation-name: floatUpAlt;
}

.bubble:nth-child(5) {
    left: 75%;
    animation-duration: 19s;
}

.bubble:nth-child(6) {
    left: 85%;
    animation-duration: 21s;
    animation-name: floatUpAlt;
}

.bubble:nth-child(7) {
    left: 95%;
    animation-duration: 16s;
}

.delay-1 {
    animation-delay: 0s;
}

.delay-2 {
    animation-delay: 2s;
}

.delay-3 {
    animation-delay: 4s;
}

.delay-4 {
    animation-delay: 7s;
}

.delay-5 {
    animation-delay: 10s;
}

.delay-6 {
    animation-delay: 12s;
}

.delay-7 {
    animation-delay: 15s;
}

@keyframes floatUp {
    0% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(calc(-100vh - 150px)) translateX(50px) rotate(360deg);
        opacity: 0;
    }
}

@keyframes floatUpAlt {
    0% {
        transform: translateY(0) translateX(0) rotate(0deg);
        opacity: 0;
    }

    10% {
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(calc(-100vh - 150px)) translateX(-50px) rotate(-360deg);
        opacity: 0;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
        letter-spacing: 4px;
    }

    .hero-subtitle {
        font-size: 1rem;
        letter-spacing: 4px;
    }

    .hero-actions {
        flex-direction: column;
    }
}

/* Home 用: コラムセクション (マーキー) */
.home-column-section {
    padding-top: 5rem;
    padding-bottom: 5rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.section-title {
    margin: 0;
    font-size: 2.5rem;
    color: var(--text-main);
    letter-spacing: 4px;
}

.more-link {
    font-family: var(--font-title);
    font-size: 1.2rem;
    color: var(--primary-color);
    letter-spacing: 2px;
}

    .more-link:hover {
        color: var(--accent-neon-red);
    }

.marquee-container {
    width: 100%;
    margin-left: 0;
    overflow: hidden;
    position: relative;
    padding: 1rem 0;
}

.marquee-content {
    display: flex;
    gap: 2rem;
    width: max-content;
    animation: scroll-left 35s linear infinite;
    padding-left: 2rem;
}

    .marquee-content:hover {
        animation-play-state: paused;
    }

.marquee-item {
    width: 320px;
    flex-shrink: 0;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(calc(-50% - 1rem));
    }
}