* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #000;
    min-height: 100vh;
    overflow: hidden;
}

/* メインコンテンツ */
.main-content {
    position: relative;
    width: 100%;
}

.main-visual {
    position: relative;
    width: 100%;
    display: flex;
    justify-content: center;
}

.main-visual > img:first-child {
    width: 1920px;
    height: 1440px;
    min-width: 1920px;
    min-height: 1440px;
    display: block;
}

/* 炎の鮮明化レイヤー */
#flame-sharp {
    position: absolute;
    top: 360px;
    left: 50%;
    margin-left: 25px;
    width: 120px;
    height: 120px;
    transform: translate(-50%, 0);
    background: radial-gradient(circle,
        rgba(255,230,150,1) 0%,
        rgba(255,180,90,0.9) 28%,
        rgba(255,140,60,0.35) 42%,
        rgba(255,100,30,0.00) 55%);
    filter: blur(6px);
    mix-blend-mode: screen;
    pointer-events: none;
    animation: flameSharpPulse 3.4s ease-in-out infinite;
}

@keyframes flameSharpPulse {
    0%, 100% { 
        opacity: 0.55; 
        transform: translate(-50%, -50%) scale(1.00); 
    }
    50% { 
        opacity: 0.7; 
        transform: translate(-50%, -50%) scale(1.02); 
    }
}

/* 火の粉エフェクト */
.flame-sparks {
    position: absolute;
    top: 325px;
    left: 50%;
    margin-left: -185px;
    width: 180px;
    height: 200px;
    pointer-events: none;
    z-index: 15;
}

.spark {
    position: absolute;
    width: 4.2px;
    height: 4.2px;
    background: radial-gradient(circle, rgba(255,235,120,1.0), rgba(255,200,100,0.4));
    border-radius: 50%;
    filter: blur(1px);
}

.spark:nth-child(1) { left: 27%; animation: sparkRise1 6.5s infinite -2s; }
.spark:nth-child(2) { left: 37%; animation: sparkRise2 3.5s infinite -3.2s; }
.spark:nth-child(3) { left: 62%; animation: sparkRise2 3.8s infinite -3.5s; }
.spark:nth-child(4) { left: 50%; animation: sparkRise3 5.2s infinite -1.5s; }
.spark:nth-child(5) { left: 35%; animation: sparkRise4 7s infinite -4s; }
.spark:nth-child(6) { left: 72%; animation: sparkRise5 4.2s infinite -2.8s; }
.spark:nth-child(7) { left: 43%; animation: sparkRise1 5.8s infinite -5s; }
.spark:nth-child(8) { left: 57%; animation: sparkRise2 3.5s infinite -3.2s; }
.spark:nth-child(9) { left: 48%; animation: sparkRise3 6.2s infinite -4.5s; }
.spark:nth-child(10) { left: 40%; animation: sparkRise4 4.5s infinite -1.8s; }
.spark:nth-child(11) { left: 55%; animation: sparkRise5 6.8s infinite -3.7s; }

@keyframes sparkRise1 {
    0% { 
        top: 85%;
        opacity: 0;
        transform: translateX(0);
    }
    10% { 
        opacity: 0.8;
    }
    70% { 
        opacity: 0.4;
    }
    100% { 
        top: 20%;
        opacity: 0;
        transform: translateX(-12px);
    }
}

@keyframes sparkRise2 {
    0% { 
        top: 80%;
        opacity: 0;
        transform: translateX(0);
    }
    10% { 
        opacity: 0.7;
    }
    70% { 
        opacity: 0.3;
    }
    100% { 
        top: 15%;
        opacity: 0;
        transform: translateX(15px);
    }
}

@keyframes sparkRise3 {
    0% { 
        top: 80%;
        opacity: 0;
        transform: translateX(0);
    }
    10% { 
        opacity: 0.9;
    }
    70% { 
        opacity: 0.5;
    }
    100% { 
        top: 25%;
        opacity: 0;
        transform: translateX(-7.5px);
    }
}

@keyframes sparkRise4 {
    0% { 
        top: 80%;
        opacity: 0;
        transform: translateX(0);
    }
    10% { 
        opacity: 0.6;
    }
    70% { 
        opacity: 0.3;
    }
    100% { 
        top: 18%;
        opacity: 0;
        transform: translateX(18px);
    }
}

@keyframes sparkRise5 {
    0% { 
        top: 80%;
        opacity: 0;
        transform: translateX(0);
    }
    10% { 
        opacity: 0.8;
    }
    70% { 
        opacity: 0.4;
    }
    100% { 
        top: 22%;
        opacity: 0;
        transform: translateX(-15px);
    }
}

/* ナビゲーションバナー */
.nav-banner {
    position: absolute;
    display: block;
    transition: border 0.1s ease;
    cursor: pointer;
}

.nav-banner:hover {
    border: 2px solid rgba(255,255,255,0.8);
}

.banner-kaisha {
    left: 50%;
    margin-left: -81.7px;
    top: 808.7px;
    width: 100.8px;
    height: 27.6px;
}

.banner-shien {
    left: 50%;
    margin-left: 35.3px;
    top: 808.7px;
    width: 100.7px;
    height: 27.6px;
}

.banner-toiawase {
    left: 50%;
    margin-left: 152px;
    top: 808.7px;
    width: 100.3px;
    height: 27.6px;
}

.banner-blog {
    left: 50%;
    margin-left: 268px;
    top: 808.5px;
    width: 100.6px;
    height: 28.1px;
}

/* プルダウンメニュー */
.dropdown-menu {
    display: none;
    position: absolute;
    bottom: 27.6px;
    left: 0;
    background-color: #e0f2f1;
    min-width: 220px;
    box-shadow: 0 -4px 8px rgba(0,0,0,0.1);
    border: 1px solid #b2dfdb;
    z-index: 1000;
}

.dropdown-menu a {
    display: block;
    padding: 5px 15px;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
    transition: background-color 0.1s ease;
}

.dropdown-menu a:hover {
    background-color: #b2dfdb;
}

.banner-kaisha.active .dropdown-menu {
    display: block;
}

/* フッター */