:root {
    --primary-color: #1a1a1a;
    --accent-color: #c9a063;
    --text-color: #333;
    --bg-light: #f4f4f4;
    --white: #ffffff;
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    overflow-x: hidden;
    background-color: var(--white);
}

/* Header */
header {
    position: fixed;
    width: 100%;
    padding: 20px 50px;
    z-index: 1000;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.pc-nav ul {
    display: flex;
    list-style: none;
    align-items: center;
}

.pc-nav ul li {
    margin-left: 30px;
}

.pc-nav a {
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.9rem;
    transition: 0.3s;
}

.btn-small {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 10px 25px;
    border-radius: 50px;
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('https://images.unsplash.com/photo-1497366216548-37526070297c?auto=format&fit=crop&w=1600&q=80') no-repeat center center/cover;
    position: relative;
    text-align: center;
    color: var(--white);
}

.hero-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); /* 文字を見やすくするためのオーバーレイ */
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.btn-main {
    display: inline-block;
    padding: 18px 45px;
    background: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 1px;
    transition: 0.3s;
}

.btn-main:hover {
    background: var(--white);
    color: var(--primary-color);
}
.section-subtext {text-align:center;margin-bottom:60px;}
/* Concept Section Layout */
.concept-layout {
    display: flex;
    align-items: center;
    gap: 50px;
}

.concept-text { flex: 1; }
.concept-image { flex: 1; }
.concept-image img {
    width: 100%;
    height: auto;
    box-shadow: 20px 20px 0 var(--bg-light);
}

/* Works */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.work-img-wrapper {
    overflow: hidden;
    margin-bottom: 15px;
    height: 250px;
}

.work-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 0.5s transform;
}

.work-item:hover img {
    transform: scale(1.1);
}

.work-name {
    font-weight: 700;
    font-size: 1rem;
}

/* Animations, Section styles, Form styles etc. are same as previous response */
/* (以下、前回のスタイルを継続) */
.section { padding: 120px 20px; }
.container { max-width: 1100px; margin: 0 auto; }
.section-title { font-family: 'Montserrat'; font-size: 3.5rem; text-align: center; margin-bottom: 60px; }
.section-title-left { font-family: 'Montserrat'; font-size: 3.5rem; margin-bottom: 30px; }
.bg-light { background-color: var(--bg-light); }
.bg-dark { background-color: var(--primary-color); color: #fff; }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.service-card { background: #fff; padding: 50px 40px; border-bottom: 4px solid transparent; transition: 0.3s; color: var(--text-color); }
.service-card:hover { border-color: var(--accent-color); transform: translateY(-5px); }
.num { display: block; font-family: 'Montserrat'; color: var(--accent-color); font-size: 1.5rem; margin-bottom: 10px; }

.company-info dt { font-weight: 700; color: var(--accent-color); }
.contact-form { max-width: 700px; margin: 0 auto; }
.form-group { margin-bottom: 20px; }
input, textarea { width: 100%; padding: 15px; border: 1px solid #ddd; outline: none; }
.btn-submit { width: 100%; padding: 20px; background: var(--primary-color); color: #fff; border: none; font-weight: 700; cursor: pointer; }
.reveal { opacity: 0; transform: translateY(50px); transition: 1.2s cubic-bezier(0.17, 0.67, 0.83, 0.67); }
.reveal.active { opacity: 1; transform: translateY(0); }
.fade-in { opacity: 0; transition: 1s ease-out; }
.fade-in-up { opacity: 0; transform: translateY(20px); transition: 1s ease-out; }
footer { text-align: center; padding: 40px; font-size: 0.8rem; background: #eee; }

@media (min-width: 769px) {
.pc{display:block;}
.sp{display:none;}
.company-info dl { display: grid; grid-template-columns: 150px 1fr; gap: 20px; max-width: 800px; margin: 0 auto; }
}
@media (max-width: 768px) {
    .concept-layout { flex-direction: column; }
    .works-grid { grid-template-columns: 1fr; }
    header { padding: 15px 20px; }
.sp{display:block;}
.pc{display:none;}
.company-info dl dd{margin-bottom:20px;}
}


/* --- ハンバーガーボタンのスタイル --- */
.menu-trigger {
    display: none; /* PCでは隠す */
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 2000;
    cursor: pointer;
}

.menu-trigger span {
    display: inline-block;
    transition: all .4s;
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
}

.menu-trigger span:nth-of-type(1) { top: 0; }
.menu-trigger span:nth-of-type(2) { top: 11px; }
.menu-trigger span:nth-of-type(3) { bottom: 0; }

/* ボタンがアクティブな時（×印） */
.menu-trigger.active span:nth-of-type(1) {
    transform: translateY(11px) rotate(-45deg);
}
.menu-trigger.active span:nth-of-type(2) {
    opacity: 0;
}
.menu-trigger.active span:nth-of-type(3) {
    transform: translateY(-11px) rotate(45deg);
}

/* --- レスポンシブ設定 (768px以下) --- */
@media (max-width: 768px) {
    .menu-trigger {
        display: block; /* スマホで表示 */
    }

    .pc-nav {
        display: block; /* 以前の display:none を解除 */
        position: fixed;
        top: 0;
        right: -100%; /* 最初は画面外に隠す */
        width: 100%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        z-index: 1500;
        transition: all 0.5s;
        padding-top: 100px; /* ロゴと重ならないよう調整 */
    }

    /* メニューが開いた時 */
    .pc-nav.active {
        right: 0;
    }

    .pc-nav ul {
        flex-direction: column;
        align-items: center;
    }

    .pc-nav ul li {
        margin: 20px 0;
        margin-left: 0; /* PC用のマージンをリセット */
    }

    .pc-nav a {
        font-size: 1.5rem;
        font-weight: 700;
    }
}