/* --- 1. 変数と基本設定 --- */
:root {
    --black: #0a0a0a;
    --blue: #1a3c7d;
    --gray: #f8f8f8;
    --white: #ffffff;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --section-gap: 150px; /* PCでの贅沢な余白 */
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--black);
    background: #fff;
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* コンテナ設定 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 5%; }
.container.narrow { max-width: 850px; }

/* --- 2. イントロ演出（シネマティック・スプリット） --- */
#intro {
    position: fixed; inset: 0; z-index: 10000;
    display: flex; align-items: center; justify-content: center; background: #fff;
}
.intro-logo-wrap {
    filter: blur(20px); opacity: 0; transform: scale(0.95);
    animation: logoFocus 1.4s var(--ease) forwards 0.5s;
}
@keyframes logoFocus { to { filter: blur(0); opacity: 1; transform: scale(1); } }
.intro-logo { width: 140px; height: auto; } /* イントロロゴを少し拡大 */

.intro-line {
    width: 0; height: 1px; background: var(--blue); margin: 20px auto 0;
    animation: lineExt 1s ease forwards 1.2s;
}
@keyframes lineExt { to { width: 100px; } }

.curtain-top, .curtain-bottom {
    position: absolute; left: 0; width: 100%; height: 50.1%; background: #fff;
    transition: 1.2s cubic-bezier(0.8, 0, 0.1, 1); z-index: -1;
}
.curtain-top { top: 0; } .curtain-bottom { bottom: 0; }
#intro.is-finished .curtain-top { transform: translateY(-100%); }
#intro.is-finished .curtain-bottom { transform: translateY(100%); }
#intro.is-finished .intro-inner { opacity: 0; transition: 0.5s; }
#intro.is-finished { pointer-events: none; visibility: hidden; transition: 0s 1.2s; }

/* --- 3. ヘッダー（一直線の整列と視認性の確保） --- */
.header {
    position: fixed; top: 0; width: 100%; z-index: 2000;
    height: 100px; display: flex; align-items: center; transition: 0.4s var(--ease);
    background: linear-gradient(to bottom, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0) 100%);
}
/* スクロール後、またはサブページでは背景を白にする */
.header.scrolled, .sub-page .header {
    background: rgba(255, 255, 255, 0.98);
    height: 80px;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }

.header-logo img {
    height: 32px; /* ロゴサイズを最適化 */
    width: auto;
    display: block;
    object-fit: contain;
}

/* PCナビゲーション */
.nav-desktop { display: flex; align-items: center; }
.nav-desktop a { text-decoration: none; color: var(--black); font-size: 0.85rem; font-weight: 700; padding: 10px 20px; transition: 0.3s; }
.nav-desktop a:hover { color: var(--blue); }

.nav-cta {
    background: var(--black) !important; color: #fff !important;
    padding: 12px 24px !important; border-radius: 4px; margin-left: 15px;
    font-size: 0.8rem !important; font-weight: 700; white-space: nowrap;
}

/* ハンバーガー（スマホ用） */
.burger {
    display: none; width: 28px; height: 18px; position: relative; cursor: pointer; z-index: 3000;
}
.burger span { position: absolute; left: 0; width: 100%; height: 2px; background: #000; transition: 0.3s; }
.burger span:nth-child(1) { top: 0; } .burger span:nth-child(2) { bottom: 0; }
.burger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.burger.active span:nth-child(2) { transform: translateY(-8px) rotate(-45deg); }

.nav-mobile {
    position: fixed; top: 0; right: -100%; width: 100%; height: 100vh;
    background: #fff; z-index: 2500; transition: 0.5s var(--ease);
    display: flex; align-items: center; justify-content: center;
}
.nav-mobile.active { right: 0; }
.mobile-menu-inner { display: flex; flex-direction: column; gap: 40px; text-align: center; }
.mobile-menu-inner a { text-decoration: none; color: #000; font-size: 1.5rem; font-weight: 900; }

/* --- 4. ヒーロースライダー（表示されない問題を解決） --- */
.hero { height: 100vh; height: 100dvh; position: relative; overflow: hidden; background: #000; }
.hero-slider { position: absolute; inset: 0; z-index: 1; } /* 背景色より前に出す */
.slide { 
    position: absolute; inset: 0; 
    background-size: cover; background-position: center; background-repeat: no-repeat;
    opacity: 0; transition: 1.5s ease-in-out; 
}
.slide.active { opacity: 1; transform: scale(1.05); }

.slider-controls {
    position: absolute; bottom: 50px; width: 100%; display: flex;
    justify-content: center; align-items: center; gap: 40px;
    color: #fff; z-index: 10; font-family: 'Montserrat'; font-size: 0.7rem; font-weight: 900;
}
.slider-dots { display: flex; gap: 10px; }
.dot { width: 20px; height: 2px; background: rgba(255,255,255,0.3); cursor: pointer; transition: 0.3s; }
.dot.active { background: #fff; width: 45px; }
.slider-controls button { background: none; border: none; color: #fff; cursor: pointer; font-weight: 900; }

/* --- 5. コンテンツセクション --- */
.section { padding: var(--section-gap) 0; }
.bg-gray { background: var(--gray); }
.section-title-wrap { margin-bottom: 70px; text-align: left; }
.main-title { font-size: 2.2rem; font-weight: 900; margin-bottom: 5px; letter-spacing: 0.05em; }
.sub-title { font-family: 'Montserrat'; font-size: 0.75rem; color: var(--blue); letter-spacing: 0.25em; text-transform: uppercase; font-weight: 700; }

/* サービスパネル */
.service-list { display: grid; gap: 120px; }
.service-panel { display: flex; gap: 70px; align-items: center; }
.s-visual { flex: 1.2; border-radius: 12px; overflow: hidden; aspect-ratio: 16/10; box-shadow: 0 20px 40px rgba(0,0,0,0.06); }
.s-visual img { width: 100%; height: 100%; object-fit: cover; }
.s-info { flex: 1; }
.s-info h3 { font-size: 1.8rem; font-weight: 900; margin-bottom: 25px; line-height: 1.4; }
.s-link { display: inline-block; margin-top: 25px; text-decoration: none; color: var(--blue); font-weight: 700; border-bottom: 2px solid var(--blue); padding-bottom: 3px; }

/* 支援事例（Homeティーザー） */
.case-teaser { background: #fff; padding: 80px 40px; border-radius: 20px; text-align: center; box-shadow: 0 10px 40px rgba(0,0,0,0.03); }
.case-teaser p { font-size: 1.1rem; margin-bottom: 30px; }
.case-btn { display: inline-block; background: #000; color: #fff; text-decoration: none; padding: 18px 50px; border-radius: 4px; font-weight: 700; transition: 0.3s; }
.case-btn:hover { background: var(--blue); transform: translateY(-3px); }

/* case.html専用グリッド */
.case-page-main { padding-top: 150px; padding-bottom: 100px; }
.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; width: 100%; }
.case-card { background: #fff; border-radius: 12px; overflow: hidden; text-decoration: none; color: inherit; box-shadow: 0 10px 40px rgba(0,0,0,0.05); transition: 0.4s var(--ease); display: block; }
.case-card:hover { transform: translateY(-10px); box-shadow: 0 20px 60px rgba(0,0,0,0.08); }
.case-card-img { width: 100%; aspect-ratio: 16/9; overflow: hidden; background: #eee; }
.case-card-img img { width: 100%; height: 100%; object-fit: cover; }
.case-card-content { padding: 30px; }
.case-card-content span { font-family: 'Montserrat'; font-size: 0.75rem; font-weight: 900; color: var(--blue); display: block; margin-bottom: 12px; }
.case-card-content h3 { font-size: 1.4rem; font-weight: 900; line-height: 1.4; }

/* 会社概要 */
.company-card { background: var(--gray); padding: 60px; border-radius: 20px; }
.c-list { display: grid; grid-template-columns: 200px 1fr; border-top: 1px solid #ddd; }
.c-list dt { padding: 30px 0; font-weight: 700; color: #666; border-bottom: 1px solid #ddd; font-size: 0.95rem; }
.c-list dd { padding: 30px 0; border-bottom: 1px solid #ddd; font-weight: 500; font-size: 1.1rem; }

/* お問い合わせ */
.bg-dark { background: var(--black); color: #fff; }
.contact-form { margin-top: 50px; background: #111; padding: 60px; border-radius: 20px; }
.form-row { margin-bottom: 30px; text-align: left; }
.form-row label { display: block; font-size: 0.9rem; font-weight: 700; margin-bottom: 10px; }
.form-row label span { color: #ff4d4d; font-size: 0.7rem; margin-left: 10px; }
.form-row input, .form-row select, .form-row textarea { width: 100%; padding: 18px; background: #1a1a1a; border: 1px solid #333; color: #fff; border-radius: 6px; font-family: inherit; font-size: 1rem; }
.submit-btn { width: 100%; padding: 22px; background: #fff; color: #000; border: none; font-weight: 900; border-radius: 6px; cursor: pointer; transition: 0.3s; font-size: 1.1rem; }
.submit-btn:hover { background: var(--blue); color: #fff; }

/* --- 6. フッター --- */
.footer { padding: 100px 0 50px; text-align: center; border-top: 1px solid #eee; background: #fff; }
.footer-logo img { height: 28px; margin-bottom: 40px; }
.footer-links { margin-bottom: 40px; display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; }
.footer-links a { font-size: 0.8rem; color: #888; text-decoration: none; font-weight: 500; transition: 0.3s; }
.footer-links a:hover { color: var(--blue); }
.copy { font-size: 0.75rem; color: #ccc; letter-spacing: 0.05em; }

/* アニメーション用 */
.reveal { opacity: 0; transform: translateY(40px); transition: 1.4s var(--ease); }
.reveal.active { opacity: 1; transform: translateY(0); }

/* ============================================================
   7. スマホ・タブレット専用の徹底最適化
   ============================================================ */
@media (max-width: 900px) {
    .header { height: 65px; }
    .header-logo img { height: 24px; }
    .nav-desktop { display: none; }
    .burger { display: block; }
    
    .hero { height: 85vh; height: 85dvh; } /* 少し短くしてスクロールを促す */
    .slider-controls { bottom: 30px; gap: 20px; }

    .section { padding: 80px 0; }
    .section-title-wrap { margin-bottom: 40px; }
    .main-title { font-size: 1.8rem; }
    
    .service-panel { flex-direction: column; gap: 30px; }
    .service-list { gap: 80px; }
    .s-info h3 { font-size: 1.4rem; }
    
    .case-grid { grid-template-columns: 1fr; }
    .case-page-main { padding-top: 100px; }

    .c-list { display: block; }
    .c-list dt { padding: 15px 0 5px; border: none; font-size: 0.85rem; color: var(--blue); }
    .c-list dd { padding: 0 0 15px; border-bottom: 1px solid #eee; font-size: 1rem; }
    
    .company-card, .contact-form, .case-teaser { padding: 30px 20px; }
    .form-row input, .form-row select, .form-row textarea { font-size: 16px; } /* iOSズーム防止 */
    
    .footer-links { gap: 15px; flex-direction: column; }
}