/* カラーパレット定義 - ポジティブな暖色系 */
    :root {
        --primary-color: #FF9EB3;      /* 明るいピンク */
        --secondary-color: #D3A4F4;    /* 薄い紫 */
        --accent-color: #4A90E2;       /* ライトブルー */
        --tertiary-color: #FF8A65;     /* コーラルオレンジ */
        --quaternary-color: #50C878;   /* エメラルドグリーン */
        --yellow-color: #FFD93D;       /* サニーイエロー */
        
        /* 調和背景色 */
        --bg-soft-blue: #d7e3f4;       /* うすい水色（背景） */
        --bg-soft-lavender: #e6d8f5;   /* うすいラベンダー（背景） */
        
        /* ポジティブな暖色ボタン */
        --coral-pink: #FF7F7F;         /* コーラルピンク */
        --peach-orange: #FFAB91;       /* ピーチオレンジ */
        --sunrise-yellow: #FFD54F;     /* サンライズイエロー */
        --warm-orange: #FFB74D;        /* ウォームオレンジ */
        
        --text-color: #333333;         /* 濃グレー */
        --bg-white: #FFFFFF;           /* 白 */
        --bg-light-pink: #FDF2F8;      /* 薄いピンク */
    }

    /* 全体の背景 */
    body {
        background: linear-gradient(120deg, var(--bg-light-pink), #e3f2fd);
        font-family: 'Noto Sans JP', "Arial", sans-serif;
    }

    /* ヒーローセクション - トップ絵背景 */
    .hero {
        text-align: center;
        padding: 80px 20px;
        background: linear-gradient(135deg, rgba(255, 158, 179, 0.9), rgba(211, 164, 244, 0.8)), 
                    url('/img/0723top.png');
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
        color: white;
        border-radius: 20px;
        box-shadow: 0 8px 32px rgba(255, 158, 179, 0.3);
        backdrop-filter: blur(5px);
        position: relative;
        overflow: hidden;
        min-height: 400px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-direction: column;
    }

    .hero::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: radial-gradient(circle at 30% 70%, rgba(255,255,255,0.3) 0%, transparent 50%),
                    radial-gradient(circle at 70% 30%, rgba(74, 144, 226, 0.2) 0%, transparent 50%);
        animation: heroFloating 6s ease-in-out infinite alternate;
    }

    .hero::after {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: conic-gradient(from 0deg, transparent, rgba(255,255,255,0.1), transparent);
        animation: heroRotate 20s linear infinite;
        opacity: 0.7;
    }

    @keyframes heroFloating {
        0% { 
            opacity: 0.8;
            transform: translateY(0px);
        }
        100% { 
            opacity: 1;
            transform: translateY(-10px);
        }
    }

    @keyframes heroRotate {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }

    .hero h1, .hero p {
        position: relative;
        z-index: 2;
        text-shadow: 0 2px 8px rgba(0,0,0,0.3);
    }

    .hero h1 {
        font-size: 3.5rem;
        font-weight: 900;
        margin-bottom: 20px;
        animation: titleGlow 3s ease-in-out infinite alternate;
    }

    @keyframes titleGlow {
        0% { text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
        100% { 
            text-shadow: 0 2px 8px rgba(0,0,0,0.3), 
                         0 0 20px rgba(255,255,255,0.5),
                         0 0 40px rgba(255,255,255,0.3);
        }
    }

    /* 投稿ボタンセクション - 調和の取れた背景 */
    .cta-section {
        text-align: center;
        margin: 30px 0;
        background: linear-gradient(to right, var(--bg-soft-blue), var(--bg-soft-lavender));
        color: var(--text-color);
        border-radius: 20px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        padding: 40px 20px;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
        animation: ctaGlow 4s ease-in-out infinite alternate;
    }

    @keyframes ctaGlow {
        0% { transform: scale(1) rotate(0deg); opacity: 0.3; }
        100% { transform: scale(1.1) rotate(180deg); opacity: 0.5; }
    }

    .cta-section h3 {
        font-size: 1.8rem;
        font-weight: 800;
        margin-bottom: 30px;
        position: relative;
        z-index: 2;
        color: var(--text-color);
    }

    .cta-buttons {
        display: flex;
        justify-content: center;
        gap: 20px;
        flex-wrap: wrap;
        position: relative;
        z-index: 2;
    }

    .cta-btn {
        color: #2D3748;
        font-weight: 700;
        border: none;
        padding: 15px 30px;
        border-radius: 12px;
        font-size: 1.1rem;
        transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        position: relative;
        overflow: hidden;
        text-decoration: none;
        display: inline-block;
        min-width: 200px;
        text-shadow: none;
    }

    /* 通常音声投稿ボタン - コーラルピンク × ピーチオレンジ */
    .cta-btn:first-child {
        background: linear-gradient(135deg, var(--coral-pink), var(--peach-orange));
        box-shadow: 0 4px 16px rgba(255, 127, 127, 0.4);
    }

    .cta-btn:first-child:hover {
        background: linear-gradient(135deg, var(--peach-orange), var(--coral-pink));
        box-shadow: 0 6px 24px rgba(255, 127, 127, 0.5);
        transform: scale(1.05);
    }

    /* ワンプッシュ投稿ボタン - サンライズイエロー × ウォームオレンジ */
    .cta-btn:last-child {
        background: linear-gradient(135deg, var(--sunrise-yellow), var(--warm-orange));
        box-shadow: 0 4px 16px rgba(255, 213, 79, 0.4);
    }

    .cta-btn:last-child:hover {
        background: linear-gradient(135deg, var(--warm-orange), var(--sunrise-yellow));
        box-shadow: 0 6px 24px rgba(255, 213, 79, 0.5);
        transform: scale(1.05);
    }

    .cta-btn::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
        transition: left 0.6s;
    }

    .cta-btn:hover::before {
        left: 100%;
    }

    .cta-btn:hover {
        color: #1A202C;
        text-decoration: none;
    }

    /* 特徴セクション */
    .feature-box {
        background-color: white;
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease-in-out;
    }

    .feature-box:hover {
        transform: translateY(-5px);
    }

    /* お知らせセクション - 新カラーパレットで統一 */
    .announcement {
        background: linear-gradient(135deg, rgba(255, 158, 179, 0.1), rgba(211, 164, 244, 0.1));
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 158, 179, 0.2);
        padding: 40px;
        border-radius: 20px;
        text-align: center;
        margin: 30px 0;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        position: relative;
    }
    
    .announcement::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        opacity: 0.05;
        border-radius: 20px;
    }
    
    .announcement h4 {
        color: var(--accent-color);
        font-weight: 700;
        font-size: 1.3rem;
        margin-bottom: 15px;
    }
    
    .announcement h2 {
        color: var(--text-color);
        font-weight: 800;
        margin-bottom: 30px;
        font-size: 2rem;
        text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    }
    
    /* 広告キャプション */
    .announcement .text-muted.small {
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 1px;
        color: var(--accent-color) !important;
        font-size: 0.9rem;
    }

    /* 音声カードデザイン - ガラスモーフィズム適用 */
    .audio-card {
        background: rgba(255, 255, 255, 0.25);
        backdrop-filter: blur(10px);
        border: 1px solid rgba(255, 255, 255, 0.3);
        padding: 25px;
        border-radius: 20px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        position: relative;
        overflow: hidden;
    }

    .audio-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
        transition: left 0.5s;
    }

    .audio-card:hover::before {
        left: 100%;
    }

    .audio-card:hover {
        transform: translateY(-8px) scale(1.02);
        box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
        background: rgba(255, 255, 255, 0.35);
    }

    .audio-card h5 {
        font-weight: 700;
        color: var(--text-color);
        font-size: 1.2rem;
        margin-bottom: 10px;
    }

    .audio-card p {
        color: #4A5568;
        line-height: 1.6;
    }

    /* セクションタイトルの強化 */
    .section-title {
        text-align: center;
        margin: 60px 0 40px 0;
        position: relative;
    }

    .section-title h3 {
        font-size: 2.2rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 15px;
        position: relative;
    }

    .section-title::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 50%;
        transform: translateX(-50%);
        width: 80px;
        height: 4px;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        border-radius: 2px;
    }

    /* コンテナの改善 */
    .content-section {
        margin: 80px 0;
        position: relative;
    }

    .content-section::before {
        content: '';
        position: absolute;
        top: -40px;
        left: 0;
        right: 0;
        height: 1px;
        background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
        opacity: 0.3;
    }

    /* ワンプッシュ投稿一覧のスタイル - 新デザイン */
    .shv {
        background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
        padding: 50px 30px;
        border-radius: 24px;
        box-shadow: 0 12px 40px rgba(74, 144, 226, 0.3);
        color: white;
        text-align: center;
        position: relative;
        overflow: hidden;
        backdrop-filter: blur(10px);
        margin: 60px 0;
    }

    .shv::before {
        content: '';
        position: absolute;
        top: -2px;
        left: -2px;
        right: -2px;
        bottom: -2px;
        background: linear-gradient(45deg, var(--primary-color), var(--accent-color), var(--secondary-color));
        border-radius: 26px;
        z-index: -1;
        animation: borderGlow 3s ease-in-out infinite alternate;
    }

    @keyframes borderGlow {
        0% { opacity: 0.5; }
        100% { opacity: 0.8; }
    }

    .shv h3 {
        font-weight: 800;
        margin-bottom: 30px;
        color: #fff;
        font-size: 1.8rem;
        text-shadow: 0 2px 4px rgba(0,0,0,0.2);
    }

    /* 再生ボタン - 新デザイン */
    .btn-play {
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: white;
        font-weight: 700;
        border: none;
        padding: 12px 24px;
        border-radius: 25px;
        transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        box-shadow: 0 4px 16px rgba(255, 158, 179, 0.4);
        position: relative;
        overflow: hidden;
    }

    .btn-play::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
        transition: left 0.5s;
    }

    .btn-play:hover::before {
        left: 100%;
    }

    .btn-play:hover {
        background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
        color: white;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(255, 158, 179, 0.6);
    }

    .mx-100 {
        width: 930px;
        max-width: 90%;
    }

    .screen {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
        pointer-events: none;
    }

    .message {
        position: absolute;
        right: -300px;
        white-space: nowrap;
        font-size: 30px;
        font-weight: bold;
        color: white;
        text-shadow: 2px 2px 4px black;
        animation: scroll 3s linear forwards;
    }

    .spad {
        text-align: center;
    }

    @keyframes scroll {
        from {
            right: -300px;
        }

        to {
            right: 100%;
        }
    }

    .screen {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
        pointer-events: none;
        z-index: 999999;
        /* 非常に高く */
    }

    .spad {
        display: none;
    }
    
    /* レスポンシブ対応 */
    @media (max-width: 768px) {
        .announcement .row {
            flex-direction: column;
        }
        
        .announcement .col-md-6 {
            margin-bottom: 20px;
        }

        .hero {
            background-attachment: scroll;
            min-height: 300px;
            padding: 60px 20px;
        }

        .hero h1 {
            font-size: 2.5rem;
        }

        .cta-buttons {
            flex-direction: column;
            align-items: center;
        }

        .cta-btn {
            width: 100%;
            max-width: 280px;
        }
    }