/* ===================================
   リセット＆基本設定
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: #2a2a2a;
    background-color: #ffffff;
    line-height: 1.8;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   ファーストビュー
   =================================== */
.hero {
    padding: 80px 0 100px;
    background: linear-gradient(180deg, #fafafa 0%, #ffffff 100%);
    text-align: center;
}

.hero-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 2.5rem;
    font-weight: 600;
    line-height: 1.6;
    letter-spacing: 0.05em;
    margin-bottom: 30px;
    color: #1a1a1a;
}

.gold-text {
    color: #d4af37;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.125rem;
    font-weight: 300;
    letter-spacing: 0.15em;
    color: #666;
    margin-bottom: 60px;
}

/* 動画エリア */
.video-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 アスペクト比 */
    background-color: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.video-container video,
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* ===================================
   プロジェクト概要セクション
   =================================== */
.about {
    padding: 120px 0;
    background-color: #ffffff;
    text-align: center;
}

.section-title {
    font-family: 'Noto Serif JP', serif;
    font-size: 2rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 60px;
    color: #1a1a1a;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background-color: #2a2a2a;
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.125rem;
    line-height: 2;
    letter-spacing: 0.05em;
    color: #444;
    margin-bottom: 35px;
}

.about-text:last-child {
    margin-bottom: 0;
}

/* ===================================
   CTAセクション
   =================================== */
.cta {
    padding: 100px 0;
    background-color: #ffffff;
    text-align: center;
}

.cta-button {
    display: inline-block;
    background-color: #06c755;
    color: #ffffff;
    font-size: 1.375rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    padding: 28px 80px;
    border-radius: 50px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 6px 25px rgba(6, 199, 85, 0.35);
    min-width: 320px;
}

.cta-button:hover {
    background-color: #05b04b;
    box-shadow: 0 8px 35px rgba(6, 199, 85, 0.45);
    transform: translateY(-3px);
}

.cta-note {
    font-size: 0.875rem;
    color: #999;
    margin-top: 25px;
    line-height: 1.8;
    letter-spacing: 0.05em;
}

/* ===================================
   フッター
   =================================== */
.footer {
    padding: 60px 0;
    background-color: #2a2a2a;
    text-align: center;
}

.footer-brand {
    font-family: 'Noto Serif JP', serif;
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    color: #ffffff;
    margin-bottom: 15px;
}

.footer-copyright {
    font-size: 0.875rem;
    color: #999;
    letter-spacing: 0.05em;
}

/* ===================================
   レスポンシブ対応
   =================================== */
@media (max-width: 768px) {
    .hero {
        padding: 60px 0 80px;
    }

    .hero-title {
        font-size: 1.75rem;
        margin-bottom: 20px;
    }

    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 40px;
    }

    .about {
        padding: 80px 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 40px;
    }

    .about-text {
        font-size: 1rem;
        margin-bottom: 25px;
    }

    .cta {
        padding: 60px 0;
    }

    .cta-button {
        font-size: 1.25rem;
        padding: 24px 50px;
        width: 90%;
        max-width: 400px;
        min-width: auto;
    }

    .cta-note {
        font-size: 0.8125rem;
        margin-top: 20px;
    }

    .footer {
        padding: 40px 0;
    }

    .footer-brand {
        font-size: 1rem;
    }

    .footer-copyright {
        font-size: 0.8125rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
        line-height: 1.5;
    }

    .hero-subtitle {
        font-size: 0.9375rem;
    }

    .section-title {
        font-size: 1.375rem;
    }

    .about-text {
        font-size: 0.9375rem;
    }

    .cta-button {
        font-size: 1.125rem;
        padding: 22px 40px;
        width: 95%;
        max-width: 100%;
    }

    .cta-note {
        font-size: 0.75rem;
        padding: 0 10px;
    }
}