:root {
            --bg-dark: #050505;
            --bg-card: rgba(10, 10, 10, 0.8);
            --text-main: #eeeeee;
            --text-muted: #888888;
            --cyan: #00ffcc;
            --magenta: #ff00ff;
            --yellow: #ffff00;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            /* Firefox用のスクロールバー設定 */
            scrollbar-width: thin;
            scrollbar-color: var(--cyan) var(--bg-dark);
        }

        /* ========== グローバルスクロールバー (Webkitブラウザ用) ========== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
            border-left: 1px solid #1a1a1a;
        }
        ::-webkit-scrollbar-thumb {
            background: linear-gradient(180deg, var(--cyan), var(--magenta));
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: linear-gradient(180deg, var(--magenta), var(--yellow));
        }

        body {
            font-family: 'Helvetica Neue', Arial, sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Scanline Effect */
        body::after {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 255, 204, 0.03) 2px, rgba(0, 255, 204, 0.03) 4px);
            pointer-events: none;
            z-index: 9999;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 100px 0;
            position: relative;
            z-index: 10;
        }

        /* SP用改行制御 */
        .sp-br {
            display: none;
        }

        .section-title {
            text-align: center;
            font-size: 32px;
            font-weight: bold;
            margin-bottom: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
        }

        .section-title::before, .section-title::after {
            content: "";
            height: 2px;
            width: 40px;
            background-color: var(--cyan);
        }

        /* サイバー風スクロール出現エフェクト（初期状態） */
        .cyber-reveal {
            will-change: transform, opacity;
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .cyber-reveal.active {
            opacity: 1;
            transform: translateY(0);
        }

        /* Header Navigation */
        .nav-header {
            position: fixed;
            top: 0;
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 40px;
            background: rgba(5, 5, 5, 0.95);
            z-index: 1000;
            border-bottom: 1px solid #1a1a1a;
        }
        .nav-header h2 {
            color: var(--cyan);
            font-family: 'Courier New', Courier, monospace;
            letter-spacing: 2px;
            font-size: 24px;
        }
        .nav-links {
            display: flex;
            gap: 30px;
            align-items: center;
        }
        .nav-links a {
            color: #ddd;
            text-decoration: none;
            font-size: 14px;
            transition: 0.3s;
            font-family: 'Courier New', Courier, monospace;
            letter-spacing: 1px;
        }
        .nav-links a:hover {
            color: var(--cyan);
        }

        /* Layout Grids */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        /* ======== Hero Section ======== */
        .hero {
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            position: relative;
            overflow: hidden;
            background-color: #000;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at center, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.1) 60%, rgba(0, 0, 0, 0.3) 100%);
            z-index: 5;
        }
        .hero-video {
            position: absolute;
            top: 50%;
            left: 50%;
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            transform: translate(-50%, -50%);
            z-index: 0;
            object-fit: cover;
        }
        .sp-video {
            display: none;
        }
        .hero-content {
            position: relative;
            z-index: 10;
        }
        .hero h1 {
            font-size: 64px;
            color: var(--cyan);
            letter-spacing: 5px;
            text-shadow: 0 0 20px rgba(0, 255, 204, 0.5);
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 20px;
            color: #ddd;
            margin-bottom: 40px;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.8);
        }
        
        /* Buttons */
        .btn {
            display: inline-block;
            padding: 15px 40px;
            font-size: 18px;
            font-weight: bold;
            text-decoration: none;
            border: 2px solid;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s ease;
            background: rgba(0, 0, 0, 0.3);
        }
        .btn-cyan {
            color: var(--cyan);
            border-color: var(--cyan);
        }
        .btn-cyan:hover {
            background: rgba(0, 255, 204, 0.2);
            box-shadow: 0 0 15px rgba(0, 255, 204, 0.4);
        }
        .btn-magenta {
            color: var(--magenta);
            border-color: var(--magenta);
        }
        .btn-magenta:hover {
            background: rgba(255, 0, 255, 0.2);
            box-shadow: 0 0 15px rgba(255, 0, 255, 0.4);
        }

        /* Floating CTA Button */
        .floating-cta {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--cyan);
            color: #000;
            padding: 15px 30px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: bold;
            text-decoration: none;
            box-shadow: 0 5px 20px rgba(0, 255, 204, 0.5);
            z-index: 1000;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .floating-cta:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 255, 204, 0.8);
            background: #fff;
        }

        /* General Card */
        .card-basic {
            background: var(--bg-card);
            border: 1px solid #333;
            padding: 30px;
            border-radius: 4px;
        }

        /* ========== Problem Section & Particles ========== */
        #problem .card-basic {
            position: relative;
            overflow: hidden;
            height: 100%;
        }
        
        .problem-list {
            list-style: none;
        }
        .problem-list li {
            margin-bottom: 15px;
            padding-left: 25px;
            position: relative;
            font-size: 15px;
            z-index: 10;
        }
        .problem-list li::before {
            content: "⚠️";
            position: absolute;
            left: 0;
            top: 0;
        }
        #problem .card-basic h3 {
            position: relative;
            z-index: 10;
        }

        /* ネオンパーティクルのCSS */
        .neon-particle {
            will-change: transform, opacity;
            position: absolute;
            pointer-events: none;
            z-index: 5;
            opacity: 0;
            --rot: 0deg;
            animation: floatShape linear infinite;
        }
        @keyframes floatShape {
            0% {
                left: -10%;
                transform: translateY(0) rotate(var(--rot));
                opacity: 0;
            }
            15% { opacity: 0.85; }
            85% { opacity: 0.85; }
            100% {
                left: 110%;
                transform: translateY(-40px) rotate(calc(var(--rot) + 180deg));
                opacity: 0;
            }
        }

        /* グラデーション＆発光エフェクトの強調ボックス */
        .gradient-glow-box {
            position: relative;
            text-align: center;
            padding: 30px;
            border-radius: 8px;
            background: transparent;
            z-index: 1;
        }
        .gradient-glow-box::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(90deg, var(--cyan), var(--magenta), var(--yellow));
            border-radius: 8px;
            filter: blur(12px);
            opacity: 0.5;
            z-index: -2;
            pointer-events: none;
        }
        .gradient-glow-box::after {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            border: 2px solid transparent;
            border-radius: 8px;
            background: linear-gradient(#050505, #050505) padding-box,
                        linear-gradient(90deg, var(--cyan), var(--magenta), var(--yellow)) border-box;
            z-index: -1;
            pointer-events: none;
        }

        /* SHOWCASE Section */
        .showcase-intro {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 40px;
            font-size: 16px;
        }
        .sns-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 40px;
        }
        .sns-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            text-decoration: none;
            padding: 12px 24px;
            border-radius: 50px;
            border: 1px solid #333;
            background: rgba(255,255,255,0.05);
            transition: all 0.3s ease;
            font-size: 15px;
            font-weight: bold;
        }
        .sns-btn i {
            font-size: 18px;
        }
        .sns-instagram:hover {
            background: rgba(225, 48, 108, 0.1);
            border-color: #E1306C;
            color: #E1306C;
            box-shadow: 0 0 15px rgba(225, 48, 108, 0.4);
        }
        .sns-tiktok:hover {
            background: rgba(0, 242, 254, 0.1);
            border-color: #00f2fe;
            color: #00f2fe;
            box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
        }
        .sns-threads:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            color: #ffffff;
            box-shadow: 0 0 15px rgba(255, 255, 255, 0.4);
        }
        .sns-youtube:hover {
            background: rgba(255, 0, 0, 0.1);
            border-color: #ff0000;
            color: #ff0000;
            box-shadow: 0 0 15px rgba(255, 0, 0, 0.4);
        }

        /* Showcase Carousel */
        .showcase-carousel-wrapper {
            position: relative;
            width: 100%;
            overflow: hidden;
            margin-top: 30px;
        }
        .showcase-carousel {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding: 20px max(20px, calc(50vw - 580px));
            scroll-behavior: smooth;
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .showcase-carousel::-webkit-scrollbar {
            display: none;
        }
        .showcase-item {
            scroll-snap-align: center;
            flex: 0 0 280px;
            position: relative;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid #333;
            transition: 0.3s;
        }
        .showcase-item:hover {
            border-color: var(--cyan);
            box-shadow: 0 0 20px rgba(0,255,204,0.2);
            transform: translateY(-5px);
        }
        .showcase-item-inner {
            position: relative;
            width: 100%;
            padding-bottom: 177.77%; /* 16:9 アスペクト比 (縦型) */
        }
        .showcase-item video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Matrix Section */
        .matrix-intro {
            text-align: center;
            color: var(--text-muted);
            margin-bottom: 40px;
        }
        .matrix-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }
        .matrix-card {
            background: var(--bg-card);
            border: 1px dashed;
            padding: 30px;
            display: flex;
            flex-direction: column;
            border-radius: 4px;
        }
        .matrix-card.full-width {
            grid-column: 1 / 3;
        }
        .matrix-card h3 {
            font-size: 20px;
            text-align: center;
            margin-bottom: 25px;
        }
        .matrix-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: 25px;
            flex-grow: 1;
        }
        .matrix-table th, .matrix-table td {
            border: 1px solid #333;
            padding: 15px;
            font-size: 15px;
            line-height: 1.6;
            vertical-align: middle;
        }
        .matrix-table th {
            width: 70px;
            text-align: center;
            background: rgba(255, 255, 255, 0.03);
            font-weight: bold;
        }
        .card-magenta { border-color: rgba(255, 0, 255, 0.5); }
        .card-magenta h3, .card-magenta th { color: var(--magenta); }
        .card-cyan { border-color: rgba(0, 255, 204, 0.5); }
        .card-cyan h3, .card-cyan th { color: var(--cyan); }
        .card-yellow { border-color: rgba(255, 255, 0, 0.5); }
        .card-yellow h3, .card-yellow th { color: var(--yellow); }

        .action-btn {
            width: 100%;
            padding: 15px;
            background: transparent;
            border: 1px solid;
            color: #fff;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: 0.3s;
            border-radius: 4px;
        }
        .card-magenta .action-btn { border-color: var(--magenta); }
        .card-magenta .action-btn:hover { background: rgba(255, 0, 255, 0.1); box-shadow: 0 0 15px rgba(255, 0, 255, 0.4); }
        .card-cyan .action-btn { border-color: var(--cyan); }
        .card-cyan .action-btn:hover { background: rgba(0, 255, 204, 0.1); box-shadow: 0 0 15px rgba(0, 255, 204, 0.4); }
        .card-yellow .action-btn { border-color: var(--yellow); }
        .card-yellow .action-btn:hover { background: rgba(255, 255, 0, 0.1); box-shadow: 0 0 15px rgba(255, 255, 0, 0.4); }

        /* Plans Carousel Section */
        .carousel-wrapper {
            position: relative;
            width: 100%;
            overflow: hidden;
        }
        .plans-carousel {
            display: flex;
            gap: 30px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding: 60px 0;
            scroll-behavior: smooth;
            -ms-overflow-style: none;
            scrollbar-width: none;
        }
        .plans-carousel::-webkit-scrollbar {
            display: none;
        }
        .plans-carousel::before,
        .plans-carousel::after {
            content: '';
            flex: 0 0 calc(50% - 175px - 15px);
        }
        .plan-card {
            scroll-snap-align: center;
            flex: 0 0 350px;
            background: var(--bg-card);
            border: 2px solid #333;
            border-radius: 8px;
            padding: 40px 30px;
            position: relative;
            transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
            opacity: 0.6;
            transform: scale(0.9);
            display: flex;
            flex-direction: column;
            cursor: pointer;
        }
        .plan-card:hover {
            opacity: 1;
        }
        .plan-card.active-plan {
            opacity: 1;
            transform: scale(1.05);
            box-shadow: 0 20px 40px rgba(0,0,0,0.6);
            z-index: 10;
        }

        #plan-start.active-plan { border-color: var(--cyan); box-shadow: 0 0 30px rgba(0, 255, 204, 0.15); }
        #plan-standard.active-plan { border-color: var(--magenta); box-shadow: 0 0 30px rgba(255, 0, 255, 0.15); }
        #plan-premium.active-plan { border-color: var(--yellow); box-shadow: 0 0 30px rgba(255, 255, 0, 0.15); }

        .recommended-badge {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            color: #fff;
            padding: 5px 20px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
            letter-spacing: 1px;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .active-plan .recommended-badge { opacity: 1; }
        
        #plan-start .recommended-badge { background: var(--cyan); color: #000; }
        #plan-standard .recommended-badge { background: var(--magenta); }
        #plan-premium .recommended-badge { background: var(--yellow); color: #000; }

        .plan-title {
            text-align: center;
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 10px;
            font-family: 'Courier New', Courier, monospace;
        }
        #plan-start .plan-title { color: var(--cyan); }
        #plan-standard .plan-title { color: var(--magenta); }
        #plan-premium .plan-title { color: var(--yellow); }

        .plan-subtitle {
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 30px;
        }

        .plan-price {
            text-align: center;
            font-size: 36px;
            font-weight: bold;
            margin-bottom: 30px;
            color: #fff;
        }
        .plan-price span {
            font-size: 16px;
            font-weight: normal;
        }

        .plan-features {
            list-style: none;
            margin-bottom: 40px;
            flex-grow: 1;
        }
        .plan-features li {
            margin-bottom: 15px;
            font-size: 14px;
            padding-bottom: 15px;
            border-bottom: 1px dashed #333;
        }
        .plan-features li:last-child {
            border-bottom: none;
        }
        .plan-features li::before {
            content: "✓";
            margin-right: 10px;
        }
        #plan-start .plan-features li::before { color: var(--cyan); }
        #plan-standard .plan-features li::before { color: var(--magenta); }
        #plan-premium .plan-features li::before { color: var(--yellow); }

        .plan-btn {
            display: block;
            width: 100%;
            padding: 15px 0;
            text-align: center;
            text-decoration: none;
            font-weight: bold;
            border: 1px solid;
            color: #fff;
            border-radius: 4px;
            transition: 0.3s;
        }
        #plan-start .plan-btn { border-color: var(--cyan); }
        #plan-standard .plan-btn { border-color: var(--magenta); }
        #plan-premium .plan-btn { border-color: var(--yellow); }
        
        #plan-start.active-plan .plan-btn:hover { background: rgba(0, 255, 204, 0.1); }
        #plan-standard.active-plan .plan-btn:hover { background: rgba(255, 0, 255, 0.1); }
        #plan-premium.active-plan .plan-btn:hover { background: rgba(255, 255, 0, 0.1); }

        /* ========== Flow Section & Waterfall Particles ========== */
        .flow-grid {
            display: grid;
            gap: 20px;
        }
        .flow-step {
            background: var(--bg-card);
            border: 1px solid #333;
            padding: 30px 20px;
            text-align: center;
            border-radius: 4px;
            position: relative;
            overflow: hidden;
        }
        .flow-step-num {
            font-family: 'Courier New', Courier, monospace;
            color: var(--cyan);
            font-size: 24px;
            font-weight: bold;
            margin-bottom: 15px;
            display: block;
            position: relative;
            z-index: 10;
        }
        .flow-step h4 {
            font-size: 16px;
            margin-bottom: 10px;
            color: #fff;
            position: relative;
            z-index: 10;
        }
        .flow-step p {
            font-size: 13px;
            color: var(--text-muted);
            position: relative;
            z-index: 10;
        }
        /* 滝のように落ちるネオン線のCSS */
        .waterfall-line {
            will-change: transform, opacity;
            position: absolute;
            width: 2px;
            background: linear-gradient(to bottom, transparent, var(--color), transparent);
            opacity: 0;
            z-index: 1; /* テキストより後ろ */
            animation: fallDown linear infinite;
        }
        @keyframes fallDown {
            0% {
                top: -20%;
                opacity: 0;
            }
            10% { opacity: 0.8; }
            90% { opacity: 0.8; }
            100% {
                top: 120%;
                opacity: 0;
            }
        }

        /* FAQ Section */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            margin-bottom: 20px;
            border: 1px solid #333;
            background: var(--bg-card);
            border-radius: 4px;
            overflow: hidden;
            position: relative;
        }
        .faq-q {
            padding: 20px;
            font-weight: bold;
            color: var(--cyan);
            background: rgba(0, 255, 204, 0.05);
            border-bottom: 1px dashed #333;
            display: flex;
            gap: 15px;
            position: relative;
            z-index: 10;
        }
        .faq-q::before {
            content: "Q.";
            font-family: 'Courier New', Courier, monospace;
        }
        .faq-a {
            padding: 20px;
            color: #ddd;
            font-size: 15px;
            display: flex;
            gap: 15px;
            position: relative;
            z-index: 10;
        }
        .faq-a::before {
            content: "A.";
            color: var(--magenta);
            font-weight: bold;
            font-family: 'Courier New', Courier, monospace;
        }

        /* CTA Section */
        .cta-section {
            position: relative;
            text-align: center;
            padding: 150px 0;
            border-top: 1px solid #222;
            overflow: hidden;
        }
        .cta-video {
            position: absolute;
            top: 50%;
            left: 50%;
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto;
            transform: translate(-50%, -50%);
            z-index: 0;
            object-fit: cover;
        }
        .cta-overlay {
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at center, rgba(255, 0, 255, 0.15) 0%, rgba(0, 0, 0, 0.4) 100%);
            z-index: 1;
        }
        .cta-content {
            position: relative;
            z-index: 10;
        }
        .cta-section h2 {
            font-family: 'Courier New', Courier, monospace;
            color: var(--magenta);
            font-size: 32px;
            margin-bottom: 20px;
            letter-spacing: 2px;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.8);
        }
        .cta-section p {
            font-size: 18px;
            margin-bottom: 40px;
            color: #ddd;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.8);
        }

        /* Footer & Modals */
        footer {
            background: #000;
            border-top: 1px solid #1a1a1a;
            padding: 40px 0;
            text-align: center;
            color: #888;
            font-size: 12px;
        }
        .footer-links {
            margin-bottom: 20px;
        }
        .footer-links a {
            color: var(--text-muted);
            text-decoration: none;
            margin: 0 15px;
            font-size: 13px;
            transition: color 0.3s;
            display: inline-block;
        }
        .footer-links a:hover {
            color: var(--cyan);
        }

        /* Modal Styles */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.85);
            backdrop-filter: blur(5px);
            z-index: 2000;
            display: flex;
            justify-content: center;
            align-items: center;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .modal-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        .modal-content {
            background: var(--bg-dark);
            border: 1px solid var(--cyan);
            box-shadow: 0 0 30px rgba(0, 255, 204, 0.15);
            width: 90%;
            max-width: 700px;
            max-height: 80vh;
            overflow-y: auto;
            padding: 40px;
            border-radius: 4px;
            position: relative;
            transform: translateY(20px);
            transition: transform 0.3s ease;
        }
        .modal-overlay.active .modal-content {
            transform: translateY(0);
        }
        .modal-close {
            position: absolute;
            top: 20px;
            right: 25px;
            background: transparent;
            border: none;
            color: var(--text-muted);
            font-size: 28px;
            cursor: pointer;
            transition: color 0.3s;
        }
        .modal-close:hover {
            color: var(--magenta);
        }
        .modal-title {
            color: var(--cyan);
            font-size: 24px;
            margin-bottom: 25px;
            border-bottom: 1px dashed #333;
            padding-bottom: 15px;
            font-family: 'Courier New', Courier, monospace;
        }
        .modal-body {
            color: #ccc;
            font-size: 14px;
            line-height: 1.8;
            text-align: left;
        }
        .modal-body h4 {
            color: #fff;
            margin: 25px 0 10px;
            font-size: 16px;
        }
        .modal-body p {
            margin-bottom: 15px;
        }
        .modal-body ul {
            margin-left: 20px;
            margin-bottom: 15px;
        }
        .modal-content::-webkit-scrollbar {
            width: 8px;
        }
        .modal-content::-webkit-scrollbar-track {
            background: #111;
        }
        .modal-content::-webkit-scrollbar-thumb {
            background: #333;
            border-radius: 4px;
        }
        .modal-content::-webkit-scrollbar-thumb:hover {
            background: var(--cyan);
        }

        /* レスポンシブ用（フォントサイズ調整を含む） */
        @media (max-width: 768px) {
            .sp-br {
                display: block; /* SP時のみ改行を有効化 */
            }
            .pc-video { display: none; }
            .sp-video { display: block; }

            .section-title { 
                font-size: 24px; 
                margin-bottom: 40px;
            }
            .hero h1 { font-size: 48px; }
            .hero p { font-size: 16px; }
            
            .cta-section h2 { 
                font-size: 24px; 
                line-height: 1.4;
            }
            .cta-section p { font-size: 15px; }

            .grid-2 { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .matrix-grid { grid-template-columns: 1fr; }
            .matrix-card.full-width { grid-column: 1; }
            .plan-card { flex: 0 0 85%; }
            .plans-carousel::before, .plans-carousel::after {
                flex: 0 0 calc(50% - 42.5% - 15px);
            }
            .showcase-item { flex: 0 0 200px; }
            .showcase-carousel::before, .showcase-carousel::after {
                flex: 0 0 calc(50% - 100px);
            }
            .flow-grid { grid-template-columns: 1fr; }
            .nav-links { display: none; }
            .floating-cta {
                bottom: 20px;
                right: 20px;
                padding: 12px 20px;
                font-size: 13px;
            }
            .footer-links a {
                display: block;
                margin: 10px 0;
            }
            .modal-content {
                padding: 30px 20px;
            }
        }
/* ========== アナログテレビ起動エフェクト ========== */
.tv-on-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: #050505;
    z-index: 15;
    pointer-events: none;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* SVGによる砂嵐ノイズの生成とアニメーション */
.tv-on-overlay::before {
    content: "";
    position: absolute;
    top: -100%; left: -100%;
    width: 300%; height: 300%;
    /* Base64化したSVGフィルターでリアルなノイズを作成 */
    background-image: url('data:image/svg+xml,%3Csvg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noise"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="0.8" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noise)"/%3E%3C/svg%3E');
    opacity: 0.6;
    animation: staticNoise 0.2s steps(2, end) infinite;
    mix-blend-mode: screen;
}

/* シアン色のカラーオーバーレイとブラウン管の走査線 */
.tv-on-overlay::after {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(rgba(0, 255, 204, 0.15) 50%, rgba(0, 0, 0, 0.3) 50%), var(--cyan);
    background-size: 100% 4px;
    mix-blend-mode: overlay;
    opacity: 0.8;
}

/* 起動開始時（ブラウン管が消えるような凝縮フラッシュ） */
.tv-on-overlay.starting {
    animation: tvPowerOnStatic 0.7s cubic-bezier(0.19, 1, 0.22, 1) forwards;
}

@keyframes staticNoise {
    0% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -5%); }
    20% { transform: translate(-10%, 5%); }
    30% { transform: translate(5%, -10%); }
    40% { transform: translate(-5%, 15%); }
    50% { transform: translate(-10%, 5%); }
    60% { transform: translate(15%, 0); }
    70% { transform: translate(0, 15%); }
    80% { transform: translate(3%, 35%); }
    90% { transform: translate(-10%, 10%); }
    100% { transform: translate(0, 0); }
}

@keyframes tvPowerOnStatic {
    0% { transform: scale(1, 1); filter: brightness(1); opacity: 1; }
    30% { transform: scale(1, 0.02); filter: brightness(3); opacity: 1; box-shadow: 0 0 50px var(--cyan); }
    60% { transform: scale(0, 0.02); filter: brightness(5); opacity: 1; }
    100% { transform: scale(0, 0); opacity: 0; }
}