/* デザイン変数：水色を基調としたパレット */
:root {
    --sky-blue: #e3f2fd;      /* 非常に淡い水色（背景） */
    --main-blue: #00a8e8;     /* 鮮やかな空色 */
    --deep-blue: #1b4965;     /* 誠実な深海色（文字） */
    --accent-blue: #62b6cb;   /* 柔らかなブルーグレー */
    --pure-white: #ffffff;
    --font-serif: 'Zen Old Mincho', serif;
    --font-sans: 'Zen Maru Gothic', sans-serif;
}

/* 基本リセット */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--pure-white);
    color: var(--deep-blue);
    font-family: var(--font-sans);
    line-height: 2;
    font-size: 18px;
    letter-spacing: 0.05em;
}

/* ヘッダー：浮遊感のあるデザイン */
header {
    height: 90px;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1200px;
    border-radius: 45px;
    z-index: 1000;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.header-inner {
    width: 100%;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--main-blue);
}

.logo span {
    color: var(--accent-blue);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: var(--deep-blue);
    font-weight: 500;
    font-size: 0.95rem;
    transition: 0.3s;
}

nav a:hover {
    color: var(--main-blue);
}

/* ヒーローセクション：対比と余白 */
.hero-watercolor {
    padding-top: 180px;
    padding-bottom: 100px;
    display: flex;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    gap: 60px;
}

.hero-content {
    flex: 1;
    padding-left: 80px;
}

.sub-lead {
    color: var(--main-blue);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    display: block;
    margin-bottom: 20px;
}

.hero-content h1 {
    font-family: var(--font-serif);
    font-size: 4rem;
    line-height: 1.3;
    margin-bottom: 30px;
    color: var(--deep-blue);
}

.hero-image-wrap {
    flex: 1.2;
    background-color: var(--sky-blue);
    padding: 40px;
    border-radius: 300px 40px 40px 300px; /* 特徴的なカーブ */
}

.hero-image-wrap img {
    width: 100%;
    height: 600px;
    object-fit: cover;
    border-radius: 280px 20px 20px 280px;
}

/* ストーリー行：交互のレイアウト */
.story-section {
    padding: 120px 0;
    background-color: var(--sky-blue);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 40px;
}

.story-row {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 120px;
}

.story-row.reverse {
    flex-direction: row-reverse;
}

.story-img {
    flex: 1;
}

.story-img img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    border-radius: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.08);
}

.story-text {
    flex: 1;
}

.number {
    font-family: var(--font-serif);
    font-size: 3rem;
    color: var(--main-blue);
    opacity: 0.3;
    margin-bottom: -20px;
}

.story-text h2 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    margin-bottom: 20px;
}

/* アドバイスカード：浮遊デザイン */
.advice-section {
    padding: 150px 0;
    text-align: center;
    background-color: var(--pure-white);
}

.advice-header h2 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    margin-bottom: 80px;
}

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

.advice-card {
    background-color: var(--pure-white);
    padding: 50px 30px;
    border-radius: 40px;
    box-shadow: 0 15px 50px rgba(0,168,232,0.08);
    border: 1px solid var(--sky-blue);
    transition: 0.3s;
}

.advice-card:hover {
    transform: translateY(-10px);
    background-color: var(--sky-blue);
}

.advice-card h3 {
    color: var(--main-blue);
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.advice-card p {
    font-size: 0.95rem;
    color: var(--deep-blue);
}

/* フッター */
footer {
    padding: 100px 40px;
    background-color: var(--deep-blue);
    color: var(--sky-blue);
    text-align: center;
}

.copyright {
    margin-top: 30px;
    font-size: 0.8rem;
    opacity: 0.5;
}

/* レスポンシブ設定 */
@media (max-width: 1000px) {
    .hero-watercolor {
        flex-direction: column;
        padding-top: 150px;
    }
    .hero-content {
        padding: 0 40px;
        text-align: center;
    }
    .hero-image-wrap {
        width: 100%;
        border-radius: 0;
    }
    .hero-image-wrap img {
        height: 400px;
        border-radius: 20px;
    }
    .story-row, .story-row.reverse {
        flex-direction: column;
        gap: 40px;
        text-align: center;
    }
    .advice-grid {
        grid-template-columns: 1fr;
    }
}