:root {
    --clr-bg: #FFFFFF;
    --clr-text: #2C3338;
    --clr-main: #00629d;
    --clr-muted: #6C757D;
}

body {
    background-color: var(--clr-bg);
    color: var(--clr-text);
    font-family: "Noto Sans JP", sans-serif;
    font-size: 14px;
    line-height: 2;
    letter-spacing: 0.05em;
    -webkit-font-smoothing: antialiased;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

img {
    -webkit-user-drag: none;
    user-drag: none;
    pointer-events: auto;
}

@media (min-width: 768px) {
    body { font-size: 16px; }
}

/* アニメーション用クラス */
.js-fade {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s cubic-bezier(0.25, 1, 0.5, 1), transform 1s cubic-bezier(0.25, 1, 0.5, 1);
}
.js-fade.is-active {
    opacity: 1;
    transform: none;
}

/* セクションタイトル */
.section-title {
    text-align: center;
    margin-bottom: 4rem;
}
.section-title-en {
    font-family: "Poppins", sans-serif;
    font-size: 2rem;
    font-weight: 300;
    color: var(--clr-main);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}
@media (min-width: 768px) {
    .section-title-en { font-size: 2.5rem; }
}
.section-title-ja {
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.2em;
    color: var(--clr-muted);
    display: block;
    margin-top: 0.5rem;
}

/* スタイリッシュなボタン */
.btn-stylish {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 3rem;
    background-color: var(--clr-main);
    color: #fff;
    font-weight: 400;
    letter-spacing: 0.1em;
    transition: all 0.3s ease;
    text-decoration: none;
    border: 1px solid var(--clr-main);
}
.btn-stylish:hover {
    background-color: #fff;
    color: var(--clr-main);
}
.btn-outline {
    background-color: transparent;
    color: var(--clr-main);
}
.btn-outline:hover {
    background-color: var(--clr-main);
    color: #fff;
}

/* シャープな画像ラッパー */
.img-wrapper {
    overflow: hidden;
    position: relative;
}

/* ヘッダー */
.header {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 80px;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 50;
    transition: all 0.4s ease;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    border-bottom: 1px solid #E9ECEF;
}
.header.is-scrolled {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

/* ハンバーガー */
.hamburger {
    width: 30px; height: 18px;
    position: relative; cursor: pointer; z-index: 60;
    background: transparent; border: none;
}
.hamburger span {
    position: absolute; width: 100%; height: 1px;
    background-color: var(--clr-text);
    left: 0; transition: all 0.3s ease;
}
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 8px; }
.hamburger span:nth-child(3) { bottom: 0; }
.hamburger.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; }
.hamburger.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.mobile-menu {
    position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
    background-color: var(--clr-bg);
    z-index: 55; display: flex; flex-direction: column;
    justify-content: center; align-items: center;
    opacity: 0; visibility: hidden; transition: all 0.4s ease;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }

/* FV スライダー & レイアウト */
#fv {
    position: relative; width: 100%; height: 100svh; min-height: 600px;
    display: flex; background-color: var(--clr-bg); overflow: hidden;
}
.fv-text-part {
    flex: 2; display: flex; flex-direction: column;
    justify-content: center; align-items: center;
    text-align: center; padding: 0 4%; position: relative; z-index: 10;
}
.fv-image-part {
    flex: 5; position: relative; height: 100%; overflow: hidden;
}
@media (max-width: 1279px) {
    #fv { flex-direction: column-reverse; }
    .fv-text-part { flex: 1.5; padding-top: 20px; padding-bottom: 20px; }
    .fv-image-part { flex: 5; }
}
@media (max-width: 767px) {
    .fv-image-part { flex: 4; }
    .fv-text-part { flex: 2.5; }
}

.fv-bg-slider { position: absolute; inset: 0; z-index: 1; }
.fv-bg-slide {
    position: absolute; inset: 0; background-position: center; background-size: cover;
    opacity: 0; animation: bgFade 18s infinite ease-in-out;
}

.fv-bg-slide:nth-child(1) { animation-delay: 0s; }
.fv-bg-slide:nth-child(2) { animation-delay: 6s; }
.fv-bg-slide:nth-child(3) { animation-delay: 12s; }
@keyframes bgFade {
    0% { opacity: 0; transform: scale(1.05); }
    10% { opacity: 1; transform: scale(1.05); }
    33% { opacity: 1; transform: scale(1.02); }
    43% { opacity: 0; transform: scale(1.0); }
    100% { opacity: 0; }
}

.fv-divider {
    width: 1px; height: 80px;
    background-color: var(--clr-main);
    margin: 0 auto 32px;
}
@media (max-width: 767px) {
    .fv-divider { height: 40px; margin: 0 auto 20px; }
}

/* Gallery Loop Slider */
.gallery-slider-wrap {
    width: 100%;
    overflow: hidden;
    position: relative;
    padding: 1rem 0;
}
.gallery-slider-track {
    display: flex;
    width: 2500px;
    animation: galleryLoop 30s linear infinite;
}
.gallery-slider-track:hover {
    animation-play-state: paused;
}
.gallery-slide {
    width: 250px;
    flex-shrink: 0;
    padding: 0 8px;
}
.gallery-slide img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

@keyframes galleryLoop {
    0% { transform: translateX(0); }
    100% { transform: translateX(-1250px); }
}

@media (min-width: 768px) {
    .gallery-slider-track {
        width: 4000px; /* 400px * 10 */
        animation: galleryLoopDesktop 40s linear infinite;
    }
    .gallery-slide {
        width: 400px;
        padding: 0 15px;
    }
    .gallery-slide img {
        height: 500px;
    }
    @keyframes galleryLoopDesktop {
        0% { transform: translateX(0); }
        100% { transform: translateX(-2000px); }
    }
}