/* ============================================================
   top.css — トップページ + オープン講座ページ 固有スタイル
   common.css を前提とする（リセット/ヘッダー/フッターは common.css 側）
   ============================================================ */

/* --- Header overrides: LINE重複解消 + ハンバーガー非表示(PC) --- */
.header__line-btn {
    display: none;
}
@media (min-width: 769px) {
    .header__hamburger {
        display: none;
    }
}
/* --- Footer overrides: CTAカード非表示 --- */
.footer__cta {
    display: none;
}
/* --- Floating CTA 非表示 --- */
.floating-cta {
    display: none;
}

/* --- Additional CSS Variables (common.css に無い分) --- */
:root {
    --font-accent: 'Inter', sans-serif;
    --color-primary-light: #EFF6FF;
    --color-navy-deep: #0F2440;
    --color-orange-dark: #EA580C;
    --color-bg-alt: #F8FAFB;
    --color-cta-bg: #111827;
    --text-hero: clamp(32px, 5vw, 56px);
    --text-section-label: 0.75rem;
    --text-section-title: clamp(24px, 3vw, 40px);
    --text-subsection: clamp(18px, 2vw, 24px);
    --text-body-top: clamp(15px, 1.1vw, 16px);
    --text-small-top: clamp(12px, 0.9vw, 14px);
    --text-impact-number: clamp(40px, 6vw, 72px);
    --weight-medium: 500;
    --weight-extrabold: 800;
    --leading-relaxed: 2.0;
    --tracking-tight: -0.01em;
    --tracking-normal: 0.04em;
    --tracking-wide: 0.12em;
    --section-padding-y: clamp(64px, 8vw, 120px);
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 40px;
    --space-xl: 64px;
    --space-2xl: 96px;
    --content-narrow: 800px;
    --content-wide: 1280px;
    --content-padding-x: clamp(16px, 4vw, 40px);
    --header-height: 64px;
}

/* ============================================================
   ヘッダー上書き: 透過→ネイビー スクロール変化
   ============================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: transparent;
    border-bottom: none;
    z-index: 100;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}
.header.is-scrolled {
    background-color: var(--color-navy);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
.header__inner {
    max-width: var(--content-wide);
    padding: 0 var(--content-padding-x);
}
.header__logo {
    font-family: var(--font-accent);
    color: white;
}
.header__logo:hover { color: white; }
.header__logo-mark {
    background: var(--color-vivid-blue);
}
.header__nav-item {
    color: rgba(255, 255, 255, 0.85);
}
.header__nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}
.header__hamburger span {
    background: white;
}
.header__line-btn {
    background: var(--color-orange);
    font-weight: 700;
}
.header__line-btn:hover {
    background: var(--color-orange-dark);
    color: white;
}
/* ドロップダウン: スクロール後はネイビー背景のまま */
@media (min-width: 1024px) {
    .header {
        position: fixed;
    }
}
@media (max-width: 1023px) {
    .header__nav {
        background: var(--color-navy);
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .header__nav-item {
        color: rgba(255,255,255,0.85);
    }
    .header__nav-item:hover {
        background: rgba(255,255,255,0.1);
    }
    .header__nav-divider {
        background: rgba(255,255,255,0.15);
    }
    .header__dropdown-menu {
        background: rgba(255,255,255,0.05);
        border: none;
    }
    .header__dropdown-item {
        color: rgba(255,255,255,0.7);
    }
    .header__dropdown-item:hover {
        background: rgba(255,255,255,0.1);
        color: white;
    }
}

/* ============================================================
   セクション共通上書き
   ============================================================ */
.section {
    padding: var(--section-padding-y) 0;
}
.section-heading {
    text-align: center;
    margin-bottom: var(--space-xl);
}
.section-heading__label {
    display: block;
    font-family: var(--font-accent);
    font-size: var(--text-section-label);
    font-weight: var(--weight-medium);
    letter-spacing: var(--tracking-wide);
    color: var(--color-vivid-blue);
    text-transform: uppercase;
    margin-bottom: 8px;
}
.section-heading__title {
    font-size: var(--text-section-title);
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.4;
}
.section-heading--light .section-heading__label {
    color: rgba(255, 255, 255, 0.6);
}
.section-heading--light .section-heading__title {
    color: white;
}

/* ============================================================
   セクション1: FV（複層グラデーション + 背景画像）
   ============================================================ */
.fv {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + 48px) 0 100px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(160deg, #050D1A 0%, #0B1D35 20%, #1A3A6A 50%, #0F2440 75%, #040A14 100%);
}
.fv__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.fv__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.2;
    mix-blend-mode: luminosity;
}
.fv__bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(11,29,53,0.6) 0%, rgba(18,43,78,0.4) 40%, rgba(15,36,64,0.7) 80%, rgba(11,26,48,0.95) 100%);
}
.fv::before {
    content: '';
    position: absolute;
    top: 10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37,99,235,0.12) 0%, transparent 60%);
    border-radius: 50%;
    z-index: 1;
    pointer-events: none;
}
.fv::after {
    content: '';
    position: absolute;
    bottom: 5%;
    left: -8%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(249,115,22,0.08) 0%, transparent 60%);
    border-radius: 50%;
    z-index: 1;
    pointer-events: none;
}
.fv__inner {
    max-width: var(--content-narrow);
    margin: 0 auto;
    padding: 0 var(--content-padding-x);
    text-align: center;
    position: relative;
    z-index: 2;
}
.fv__label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: var(--text-section-label);
    font-weight: var(--weight-medium);
    letter-spacing: var(--tracking-wide);
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    margin-bottom: 16px;
}
.fv__heading {
    font-size: var(--text-hero);
    font-weight: var(--weight-extrabold);
    color: white;
    line-height: 1.3;
    letter-spacing: var(--tracking-tight);
    margin-bottom: 24px;
}
.fv__problems {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
}
.fv__problem-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.9);
    border-radius: 9999px;
    font-size: 0.9375rem;
    font-weight: var(--weight-medium);
    backdrop-filter: blur(4px);
}
.fv__sub {
    font-size: clamp(15px, 1.2vw, 18px);
    color: rgba(255,255,255,0.65);
    line-height: var(--leading-relaxed);
    max-width: 600px;
    margin: 0 auto;
}
.fv__scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,0.35);
    font-size: 0.6875rem;
    font-family: var(--font-accent);
    letter-spacing: 0.1em;
    animation: scrollBounce 2s ease-in-out infinite;
    z-index: 10;
}
@keyframes scrollBounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(6px); }
}

/* ============================================================
   セクション2: RMMSとは（白→ブルーグラデ + 幾何学装飾）
   ============================================================ */
.section--about {
    background: linear-gradient(170deg, #FFFFFF 0%, #E8F0FE 40%, #C8DBFD 100%);
    position: relative;
    overflow: hidden;
}
.section--about::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, rgba(37,99,235,0.03) 40%, transparent 60%);
    border: 3px solid rgba(37,99,235,0.1);
    border-radius: 50%;
    pointer-events: none;
}
.section--about::after {
    content: '';
    position: absolute;
    bottom: -80px;
    left: -60px;
    width: 360px;
    height: 360px;
    border: 3px solid rgba(37,99,235,0.07);
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 0 20px rgba(37,99,235,0.03);
}
.section--about .container {
    position: relative;
}
.section--about .container::before {
    content: '';
    position: absolute;
    top: 40px;
    right: -20px;
    width: 16px;
    height: 16px;
    background: rgba(37,99,235,0.2);
    border-radius: 50%;
    pointer-events: none;
    box-shadow:
        -40px 30px 0 6px rgba(96,165,250,0.12),
        20px 70px 0 10px rgba(37,99,235,0.06),
        -80px 110px 0 4px rgba(37,99,235,0.15),
        30px 160px 0 8px rgba(96,165,250,0.08),
        -20px 200px 0 12px rgba(37,99,235,0.04),
        60px 250px 0 rgba(37,99,235,0.12);
}
.section--about .container::after {
    content: '';
    position: absolute;
    top: -20px;
    left: -60px;
    width: 160px;
    height: 160px;
    background: repeating-linear-gradient(45deg, transparent, transparent 8px, rgba(37,99,235,0.04) 8px, rgba(37,99,235,0.04) 10px);
    border-radius: 50%;
    pointer-events: none;
}
.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: start;
    position: relative;
    z-index: 1;
}
.about__image {
    border-radius: 12px;
    overflow: visible;
    position: relative;
}
.about__image img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(30,58,95,0.15);
    position: relative;
    z-index: 1;
}
.about__image::before {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    right: 8px;
    bottom: 8px;
    border: 3px solid var(--color-vivid-blue);
    border-radius: 14px;
    z-index: 0;
    opacity: 0.2;
}
.about__image::after {
    content: '';
    position: absolute;
    bottom: -16px;
    right: -16px;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-vivid-blue) 0%, var(--color-deep-blue) 100%);
    border-radius: 12px;
    z-index: 0;
    opacity: 0.12;
}
.about__text {
    font-size: clamp(15px, 1.1vw, 17px);
    line-height: var(--leading-relaxed);
    color: var(--color-dark-gray);
}
.about__text p {
    margin-bottom: 1.5em;
}
.about__highlight {
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    color: var(--color-navy);
    padding: 20px 24px 20px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: var(--weight-medium);
    line-height: 1.8;
    margin: 24px 0;
    position: relative;
    border: 1px solid rgba(37,99,235,0.12);
}
.about__highlight::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--color-vivid-blue);
    border-radius: 4px 0 0 4px;
}
.about__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-vivid-blue);
    font-weight: 700;
    margin-top: var(--space-md);
}
.about__link .btn-arrow {
    transition: transform 0.3s ease;
}
.about__link:hover .btn-arrow {
    transform: translateX(4px);
}

/* ============================================================
   セクション3: 受講生の変化（ネイビー背景）
   ============================================================ */
.section--results {
    background: linear-gradient(160deg, #1A3F6B 0%, #0F2440 40%, #081629 100%);
    color: white;
    position: relative;
    overflow: hidden;
}
.section--results::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 15% 20%, rgba(249,115,22,0.08) 0%, transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(37,99,235,0.1) 0%, transparent 40%),
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
    pointer-events: none;
}
.section--results::after {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 400px;
    height: 400px;
    border: 2px solid rgba(249,115,22,0.1);
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 0 30px rgba(249,115,22,0.03);
}
.section--results .section-heading__label {
    color: rgba(255,255,255,0.5);
}
.section--results .section-heading__title {
    color: white;
}
.section--results .stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto var(--space-xl);
    text-align: center;
    position: relative;
    z-index: 1;
}
.stat-item {
    position: relative;
}
.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -16px;
    top: 20%;
    height: 60%;
    width: 1px;
    background: rgba(255,255,255,0.2);
}
.stat-item__label {
    font-size: 0.875rem;
    color: rgba(255,255,255,0.7);
    margin-bottom: 8px;
}
.stat-item__number {
    font-family: var(--font-accent);
    font-size: var(--text-impact-number);
    font-weight: 700;
    color: white;
    line-height: 1.1;
    white-space: nowrap;
}
.stat-item__unit {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255,255,255,0.9);
}
.voice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.voice-card {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    border-left: none;
}
.voice-card__photo {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-light-gray);
    flex-shrink: 0;
}
.voice-card__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.voice-card__photo--osteopath img {
    transform: scale(1.4);
}
.voice-card__industry {
    display: inline-block;
    padding: 2px 10px;
    background: var(--color-primary-light);
    color: var(--color-vivid-blue);
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: var(--weight-medium);
    margin-bottom: 6px;
}
.voice-card__quote {
    font-size: var(--text-small-top);
    line-height: 1.8;
    color: var(--color-dark-gray);
    padding-left: 12px;
    border-left: 3px solid var(--color-orange);
    margin-top: 8px;
}
.voice-card__result {
    font-family: var(--font-accent);
    font-weight: 700;
    color: var(--color-green);
    font-size: 0.85rem;
    margin-top: 8px;
}
.voice-card__author {
    font-size: 0.75rem;
    color: var(--color-medium-gray);
    margin-top: 4px;
}

/* ============================================================
   セクション4: 他との違い（ブルー背景）
   ============================================================ */
.section--diff {
    background: linear-gradient(160deg, #3B82F6 0%, #1E40AF 40%, #1E3A8A 100%);
    color: white;
    position: relative;
    overflow: hidden;
}
.section--diff::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 10% 80%, rgba(255,255,255,0.06) 0%, transparent 35%),
        radial-gradient(circle at 90% 10%, rgba(255,255,255,0.05) 0%, transparent 30%),
        repeating-linear-gradient(-45deg, transparent, transparent 60px, rgba(255,255,255,0.025) 60px, rgba(255,255,255,0.025) 62px);
    pointer-events: none;
}
.section--diff::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -60px;
    width: 350px;
    height: 350px;
    border: 3px solid rgba(255,255,255,0.06);
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 0 25px rgba(255,255,255,0.02), 0 0 0 50px rgba(255,255,255,0.01);
}
.section--diff .section-heading__label {
    color: rgba(255,255,255,0.6);
}
.section--diff .section-heading__title {
    color: white;
}
.diff-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    max-width: 900px;
    margin: 0 auto var(--space-xl);
    position: relative;
    z-index: 1;
}
.diff-compare__col {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 16px;
    padding: 32px 28px;
    backdrop-filter: blur(8px);
}
.diff-compare__col--rmms {
    border-color: var(--color-orange);
    border-width: 2px;
    background: rgba(255,255,255,0.12);
}
.diff-compare__badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 16px;
}
.diff-compare__col--other .diff-compare__badge {
    background: rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.7);
}
.diff-compare__col--rmms .diff-compare__badge {
    background: var(--color-orange);
    color: white;
}
.diff-compare__title {
    font-size: 1.125rem;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}
.diff-compare__list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.diff-compare__list li {
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    font-size: var(--text-body-top);
    color: rgba(255,255,255,0.8);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.6;
}
.diff-compare__list li::before {
    content: '\00d7';
    color: rgba(255,255,255,0.4);
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}
.diff-compare__col--rmms .diff-compare__list li::before {
    content: '\2713';
    color: var(--color-orange);
}
.diff-section__message {
    text-align: center;
    font-size: var(--text-body-top);
    color: rgba(255,255,255,0.85);
    margin-top: var(--space-lg);
    line-height: 1.8;
}

/* ============================================================
   セクション5: カリキュラム概要（暖色グラデーション）
   ============================================================ */
.section--curriculum {
    background: linear-gradient(160deg, #FFFFFF 0%, #FFEDD5 30%, #FDBA74 100%);
    position: relative;
    overflow: hidden;
}
.section--curriculum::before {
    content: '1234';
    position: absolute;
    top: 50%;
    right: -2%;
    transform: translateY(-50%);
    font-family: var(--font-accent);
    font-size: clamp(200px, 20vw, 400px);
    font-weight: var(--weight-extrabold);
    color: rgba(249,115,22,0.06);
    letter-spacing: -0.05em;
    pointer-events: none;
    line-height: 1;
}
.section--curriculum::after {
    content: '';
    position: absolute;
    top: -80px;
    left: -60px;
    width: 350px;
    height: 350px;
    border: 3px solid rgba(249,115,22,0.1);
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 0 25px rgba(249,115,22,0.04), 0 0 0 50px rgba(249,115,22,0.02);
}
.section--curriculum .container {
    position: relative;
}
.section--curriculum .container::before {
    content: '';
    position: absolute;
    bottom: -40px;
    right: -30px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(249,115,22,0.08) 0%, transparent 55%);
    border-radius: 50%;
    pointer-events: none;
}
.section--curriculum .container::after {
    content: '';
    position: absolute;
    top: 100px;
    left: -40px;
    width: 12px;
    height: 12px;
    background: rgba(249,115,22,0.2);
    border-radius: 50%;
    pointer-events: none;
    box-shadow:
        40px -20px 0 6px rgba(249,115,22,0.08),
        -10px 60px 0 4px rgba(249,115,22,0.15),
        60px 80px 0 8px rgba(249,115,22,0.05),
        20px 140px 0 rgba(234,88,12,0.12);
}
.curriculum-zone {
    text-align: center;
    margin-bottom: var(--space-lg);
}
.curriculum-zone--open {
    margin-top: var(--space-2xl);
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(0,0,0,0.1);
}
.curriculum-zone__title {
    font-size: var(--text-subsection);
    font-weight: 700;
    color: var(--color-navy);
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}
.curriculum-zone__sub {
    font-size: var(--text-small-top);
    font-weight: 400;
    color: var(--color-medium-gray);
}
.curriculum-zone__lead {
    font-size: var(--text-body-top);
    color: var(--color-dark-gray);
    line-height: 1.8;
    margin-top: 12px;
}
.curriculum-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}
.curriculum-flow--five {
    grid-template-columns: repeat(5, 1fr);
}
.curriculum-step {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(30,58,95,0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
}
.curriculum-step:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(30,58,95,0.12);
}
.curriculum-step:not(:last-child)::after {
    content: '';
    position: absolute;
    right: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid var(--color-orange);
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    z-index: 2;
    opacity: 0.6;
}
.curriculum-step__image-wrap {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
}
.curriculum-step__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.curriculum-step__content {
    padding: 20px 16px;
    text-align: center;
}
.curriculum-step__number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-orange) 0%, var(--color-orange-dark) 100%);
    color: white;
    border-radius: 50%;
    font-family: var(--font-accent);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    box-shadow: 0 4px 12px rgba(249,115,22,0.25);
}
.curriculum-step__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 6px;
}
.curriculum-step__desc {
    font-size: var(--text-small-top);
    color: var(--color-medium-gray);
    line-height: 1.6;
}

/* コース比較カード */
.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-xl);
    padding-top: 16px;
    position: relative;
    z-index: 1;
}
.course-grid--two {
    grid-template-columns: repeat(2, 1fr);
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}
.course-card {
    background: linear-gradient(160deg, #F0F4FA 0%, #E8EEF7 50%, #DBEAFE 100%);
    border: 2px solid rgba(37,99,235,0.1);
    border-radius: 16px;
    padding: 36px 24px;
    position: relative;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
    overflow: visible;
}
.course-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(90deg, #93C5FD 0%, var(--color-vivid-blue) 100%);
    border-radius: 16px 16px 0 0;
}
.course-card:hover {
    box-shadow: 0 8px 24px rgba(37,99,235,0.15);
    transform: translateY(-4px);
}
.course-card--featured {
    background: linear-gradient(160deg, #FFF7ED 0%, #FFEDD5 50%, #FED7AA 100%);
    border-color: var(--color-orange);
    box-shadow: 0 4px 20px rgba(249,115,22,0.15);
}
.course-card--featured::before {
    background: linear-gradient(90deg, var(--color-orange) 0%, #FB923C 100%);
    height: 8px;
}
.course-card__badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #F97316 0%, #EA580C 30%, #FB923C 60%, #EA580C 100%);
    background-size: 200% 100%;
    animation: badgeShimmer 3s ease-in-out infinite;
    color: white;
    padding: 6px 20px;
    border-radius: 9999px;
    font-size: 0.8125rem;
    font-weight: 700;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(37,99,235,0.35), 0 0 20px rgba(37,99,235,0.15);
    letter-spacing: 0.02em;
}
@keyframes badgeShimmer {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
.course-card__name {
    font-size: var(--text-subsection);
    font-weight: 700;
    color: var(--color-navy);
    text-align: center;
    margin-bottom: 8px;
}
.course-card__price {
    font-family: var(--font-accent);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-orange);
    text-align: center;
    margin-bottom: 24px;
}
.course-card__price .unit {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
    font-family: 'Noto Sans JP', sans-serif;
}
.course-card__features {
    list-style: none;
    padding: 0;
    margin: 0;
}
.course-card__features li {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-light-gray);
    font-size: var(--text-body-top);
    color: var(--color-dark-gray);
}
.course-card__features li::before {
    content: "\2713 ";
    color: var(--color-green);
    font-weight: 700;
}

/* サービスグリッド（オープン講座） */
.service-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}
.service-grid--photo {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}
.service-card--photo {
    display: flex;
    flex-direction: column;
    padding: 0;
    text-align: left;
    align-items: stretch;
    border-radius: 16px;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(0,0,0,0.08);
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    text-decoration: none;
    color: inherit;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.service-card--photo:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.14);
    color: inherit;
}
.service-card__photo {
    width: 100%;
    height: 200px;
    overflow: hidden;
}
.service-card__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.service-card--photo:hover .service-card__photo img {
    transform: scale(1.05);
}
.service-card__body {
    padding: 20px 24px 24px;
}
.service-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 10px;
}
.service-card__desc {
    font-size: var(--text-small-top);
    color: var(--color-medium-gray);
    line-height: 1.7;
}
.service-card__link {
    display: inline-block;
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-orange);
}
.service-card--execution .service-card__photo img {
    object-position: center 30%;
}
.service-card--execution:hover .service-card__photo img {
    transform: scale(1.05);
}

/* ============================================================
   セクション6: 講師紹介（ダークネイビー背景）
   ============================================================ */
.section--instructor {
    background: linear-gradient(160deg, #1A3F6B 0%, #0D1F3C 50%, #070F1F 100%);
    position: relative;
    overflow: hidden;
}
.section--instructor::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -60px;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(249,115,22,0.1) 0%, rgba(249,115,22,0.03) 35%, transparent 55%);
    border: 2px solid rgba(249,115,22,0.08);
    border-radius: 50%;
    pointer-events: none;
}
.section--instructor::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -80px;
    width: 400px;
    height: 400px;
    border: 2px solid rgba(37,99,235,0.08);
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 0 25px rgba(37,99,235,0.03), 0 0 80px rgba(37,99,235,0.05);
}
.section--instructor .container {
    position: relative;
}
.section--instructor .container::before {
    content: '';
    position: absolute;
    top: 30px;
    right: 0;
    width: 10px;
    height: 10px;
    background: rgba(249,115,22,0.3);
    border-radius: 50%;
    pointer-events: none;
    box-shadow:
        -30px 40px 0 5px rgba(249,115,22,0.1),
        20px 80px 0 3px rgba(249,115,22,0.2),
        -50px 130px 0 7px rgba(249,115,22,0.06),
        40px 180px 0 rgba(249,115,22,0.15);
}
.section--instructor .container::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: -20px;
    width: 180px;
    height: 180px;
    background: repeating-linear-gradient(-45deg, transparent, transparent 10px, rgba(249,115,22,0.03) 10px, rgba(249,115,22,0.03) 12px);
    border-radius: 50%;
    pointer-events: none;
}
.section--instructor .section-heading__label {
    color: rgba(255,255,255,0.5);
}
.section--instructor .section-heading__title {
    color: white;
}
.instructor {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-xl);
    align-items: start;
}
.instructor__photo-wrap {
    position: relative;
    padding-top: 105px;
}
.instructor__photo {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
    background: var(--color-light-gray);
    position: relative;
    z-index: 1;
    border: 3px solid rgba(249,115,22,0.4);
    overflow: hidden;
    text-align: left;
}
.instructor__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: 20% center;
    transform: scale(1.4);
}
.instructor__photo-wrap::before {
    content: '';
    position: absolute;
    top: calc(105px - 8px);
    left: -8px;
    width: 296px;
    height: 296px;
    border: 2px dashed rgba(249,115,22,0.25);
    border-radius: 50%;
    z-index: 0;
}
.instructor__name-ruby {
    font-size: var(--text-small-top);
    color: rgba(255,255,255,0.6);
    margin-bottom: 4px;
}
.instructor__name {
    font-size: var(--text-subsection);
    font-weight: var(--weight-extrabold);
    color: white;
    margin-bottom: 4px;
}
.instructor__title {
    font-size: var(--text-small-top);
    color: var(--color-orange);
    margin-bottom: 20px;
}
.instructor__body {
    font-size: var(--text-body-top);
    line-height: var(--leading-relaxed);
    color: rgba(255,255,255,0.85);
}
.instructor__body p {
    margin-bottom: 1em;
}
.instructor__quote-text {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(249,115,22,0.2);
    border-left: 4px solid var(--color-orange);
    color: white;
    padding: 24px 32px;
    border-radius: 0 12px 12px 0;
    font-size: 1.1rem;
    line-height: 1.8;
    margin: 24px 0;
    position: relative;
}
.instructor__quote-text::before {
    content: "\201C";
    font-size: 5rem;
    color: rgba(249,115,22,0.15);
    position: absolute;
    top: -12px;
    left: 12px;
    font-family: Georgia, serif;
}
.instructor__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}
.instructor__stat {
    padding: 4px 14px;
    border: 1px solid rgba(249,115,22,0.3);
    background: rgba(249,115,22,0.08);
    border-radius: 9999px;
    font-size: var(--text-small-top);
    color: rgba(255,255,255,0.85);
}
.instructor__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-orange);
    font-weight: 700;
    margin-top: var(--space-md);
}
.instructor__link .btn-arrow {
    transition: transform 0.3s ease;
}
.instructor__link:hover .btn-arrow {
    transform: translateX(4px);
}

/* ============================================================
   セクション7: 最新コラム（白→ブルーグラデ）
   ============================================================ */
.section--columns {
    background: linear-gradient(170deg, #FFFFFF 0%, #EEF4FF 50%, #C8DBFD 100%);
    position: relative;
    overflow: hidden;
}
.section--columns::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -40px;
    width: 280px;
    height: 280px;
    border: 2px solid rgba(37,99,235,0.06);
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 0 20px rgba(37,99,235,0.02);
}
.section--columns::after {
    content: '';
    position: absolute;
    bottom: -40px;
    left: -30px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(37,99,235,0.04) 0%, transparent 55%);
    border-radius: 50%;
    pointer-events: none;
}
.column-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    position: relative;
    z-index: 1;
}
.column-card {
    display: block;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    border: 1px solid #E5E7EB;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.column-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(30,58,95,0.1);
    color: inherit;
    text-decoration: none;
}
.column-card__thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
}
.column-card__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.column-card:hover .column-card__thumb img {
    transform: scale(1.05);
}
.column-card__cat {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 3px 12px;
    background: var(--color-navy);
    color: white;
    font-size: 0.6875rem;
    font-weight: 700;
    border-radius: 4px;
    letter-spacing: 0.02em;
}
.column-card__body {
    padding: 20px;
}
.column-card__date {
    display: block;
    font-family: var(--font-accent);
    font-size: 0.75rem;
    color: var(--color-medium-gray);
    margin-bottom: 8px;
}
.column-card__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.column-card__excerpt {
    font-size: var(--text-small-top);
    color: var(--color-medium-gray);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.column-more {
    text-align: center;
    margin-top: var(--space-lg);
}
.column-more__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    border: 2px solid var(--color-navy);
    color: var(--color-navy);
    font-weight: 700;
    font-size: 0.9375rem;
    border-radius: 8px;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.column-more__link:hover {
    background: var(--color-navy);
    color: white;
    transform: translateY(-2px);
}
.column-more__link .btn-arrow {
    transition: transform 0.3s ease;
}
.column-more__link:hover .btn-arrow {
    transform: translateX(4px);
}

/* ============================================================
   セクション8: CTA（ダーク背景 + ドットテクスチャ）
   ============================================================ */
.cta-section {
    background: linear-gradient(135deg, #0A0F1A 0%, #111827 30%, #1E293B 60%, #0A0F1A 100%);
    background-image:
        radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
        linear-gradient(135deg, #0A0F1A 0%, #111827 30%, #1E293B 60%, #0A0F1A 100%);
    background-size: 20px 20px, 100% 100%;
    padding: var(--section-padding-y) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section .section-heading__label {
    color: rgba(255,255,255,0.5);
}
.cta-section .section-heading__title {
    color: white;
}
.cta-section__mission {
    font-size: clamp(16px, 1.5vw, 20px);
    color: rgba(255,255,255,0.7);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}
.cta-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}
.cta-card {
    border-radius: 16px;
    text-align: left;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}
.cta-card__image-wrap {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
}
.cta-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.cta-card:hover .cta-card__image {
    transform: scale(1.05);
}
.cta-card__content {
    padding: 1.5rem 1.5rem 2rem;
}
.cta-card:hover {
    transform: translateY(-4px);
}
.cta-card--hot {
    background: linear-gradient(160deg, #FFF7ED 0%, #FFEDD5 100%);
    border: 1px solid rgba(249,115,22,0.15);
    box-shadow: 0 4px 20px rgba(249,115,22,0.08);
}
.cta-card--hot:hover {
    box-shadow: 0 8px 32px rgba(249,115,22,0.15);
}
.cta-card--hot .cta-card__action {
    color: #9A3412;
}
.cta-card--warm {
    background: linear-gradient(160deg, #EFF6FF 0%, #DBEAFE 100%);
    border: 1px solid rgba(37,99,235,0.12);
    box-shadow: 0 4px 20px rgba(37,99,235,0.08);
}
.cta-card--warm:hover {
    box-shadow: 0 8px 32px rgba(37,99,235,0.15);
}
.cta-card--warm .cta-card__action {
    color: var(--color-deep-blue);
}
.cta-card--cool {
    background: linear-gradient(160deg, #ECFDF5 0%, #D1FAE5 100%);
    border: 1px solid rgba(6,199,85,0.12);
    box-shadow: 0 4px 20px rgba(6,199,85,0.08);
}
.cta-card--cool:hover {
    box-shadow: 0 8px 32px rgba(6,199,85,0.15);
}
.cta-card--cool .cta-card__action {
    color: #065F46;
}
.cta-card__temp {
    display: inline-block;
    font-size: 0.7rem;
    margin-bottom: 12px;
    font-weight: var(--weight-medium);
    padding: 2px 10px;
    border-radius: 9999px;
}
.cta-card--hot .cta-card__temp {
    background: rgba(249,115,22,0.1);
    color: #9A3412;
}
.cta-card--warm .cta-card__temp {
    background: rgba(37,99,235,0.1);
    color: var(--color-deep-blue);
}
.cta-card--cool .cta-card__temp {
    background: rgba(6,199,85,0.1);
    color: #065F46;
}
.cta-card__action {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}
.cta-card__desc {
    font-size: var(--text-small-top);
    color: var(--color-medium-gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}
.cta-card__btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}
.cta-card__btn:hover {
    transform: translateY(-2px);
    text-decoration: none;
}
.cta-card__btn--primary {
    background-color: var(--color-orange);
    color: white;
}
.cta-card__btn--primary:hover {
    background-color: var(--color-orange-dark);
    color: white;
    box-shadow: 0 4px 12px rgba(249,115,22,0.3);
}
.cta-card__btn--secondary {
    background-color: var(--color-vivid-blue);
    color: white;
}
.cta-card__btn--secondary:hover {
    background-color: var(--color-deep-blue);
    color: white;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.cta-card__btn--line {
    background-color: var(--color-line-green);
    color: white;
}
.cta-card__btn--line:hover {
    background-color: #05B34D;
    color: white;
    box-shadow: 0 4px 12px rgba(6,199,85,0.3);
}
.cta-card__btn-arrow {
    transition: transform 0.3s ease;
}
.cta-card__btn:hover .cta-card__btn-arrow {
    transform: translateX(4px);
}

/* ============================================================
   オープン講座ページ固有スタイル
   ============================================================ */
.open-hero {
    background: linear-gradient(135deg, var(--color-navy-deep) 0%, var(--color-navy) 50%, var(--color-deep-blue) 100%);
    padding: calc(var(--header-height) + 80px) 0 64px;
    text-align: center;
    color: white;
}
.open-hero__label {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: var(--text-section-label);
    font-weight: var(--weight-medium);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.6);
    margin-bottom: 16px;
}
.open-hero__title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: var(--weight-extrabold);
    line-height: 1.4;
    margin-bottom: 20px;
    color: white;
}
.open-hero__sub {
    font-size: var(--text-body-top);
    color: rgba(255,255,255,0.75);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}
.open-courses {
    padding: 80px 0;
    background: var(--color-bg-alt);
}
.open-courses .container {
    max-width: 1000px;
}
.open-course {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
    transition: box-shadow 0.3s ease;
}
.open-course:hover {
    box-shadow: 0 8px 40px rgba(0,0,0,0.1);
}
.open-course + .open-course {
    margin-top: 48px;
}
.open-course:nth-child(even) {
    direction: rtl;
}
.open-course:nth-child(even) > * {
    direction: ltr;
}
.open-course__photo {
    position: relative;
    overflow: hidden;
    min-height: 320px;
}
.open-course__photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.open-course__body {
    padding: 48px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.open-course__tag {
    display: inline-block;
    font-family: var(--font-accent);
    font-size: 0.6875rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-vivid-blue);
    background: var(--color-primary-light);
    padding: 4px 12px;
    border-radius: 4px;
    margin-bottom: 16px;
    align-self: flex-start;
}
.open-course__name {
    font-size: clamp(20px, 2.5vw, 28px);
    font-weight: 700;
    color: var(--color-dark-gray);
    line-height: 1.4;
    margin-bottom: 16px;
}
.open-course__desc {
    font-size: var(--text-body-top);
    color: var(--color-medium-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}
.open-course__features {
    list-style: none;
    margin-bottom: 32px;
}
.open-course__features li {
    position: relative;
    padding-left: 20px;
    font-size: var(--text-small-top);
    color: var(--color-dark-gray);
    line-height: 1.8;
}
.open-course__features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-vivid-blue);
}
.open-course__btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    font-weight: var(--weight-medium);
    color: white;
    background: var(--color-vivid-blue);
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.2s ease;
    align-self: flex-start;
}
.open-course__btn:hover {
    background: var(--color-deep-blue);
    color: white;
    transform: translateY(-1px);
}
.open-course__btn-arrow {
    transition: transform 0.2s ease;
}
.open-course__btn:hover .open-course__btn-arrow {
    transform: translateX(4px);
}
.open-cta {
    background: var(--color-cta-bg);
    padding: 80px 0;
    text-align: center;
    color: white;
}
.open-cta__title {
    font-size: clamp(20px, 3vw, 32px);
    font-weight: 700;
    margin-bottom: 16px;
    color: white;
}
.open-cta__text {
    font-size: var(--text-body-top);
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    max-width: 560px;
    margin: 0 auto 32px;
}
.open-cta__actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.open-cta__btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9375rem;
    font-weight: var(--weight-medium);
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.3s ease;
}
.open-cta__btn:hover {
    transform: translateY(-2px);
}
.open-cta__btn--primary {
    color: white;
    background: var(--color-orange);
}
.open-cta__btn--primary:hover {
    color: white;
    box-shadow: 0 4px 20px rgba(249,115,22,0.4);
}
.open-cta__btn--secondary {
    color: white;
    border: 1px solid rgba(255,255,255,0.3);
    background: transparent;
}
.open-cta__btn--secondary:hover {
    color: white;
    border-color: rgba(255,255,255,0.6);
    box-shadow: 0 4px 20px rgba(255,255,255,0.1);
}

/* ============================================================
   アニメーション
   ============================================================ */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.fade-in-group > * {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in-group.is-visible > * {
    opacity: 1;
    transform: translateY(0);
}
.fade-in-group.is-visible > *:nth-child(1) { transition-delay: 0s; }
.fade-in-group.is-visible > *:nth-child(2) { transition-delay: 0.1s; }
.fade-in-group.is-visible > *:nth-child(3) { transition-delay: 0.15s; }
.fade-in-group.is-visible > *:nth-child(4) { transition-delay: 0.2s; }

@media (prefers-reduced-motion: reduce) {
    .fade-in,
    .fade-in-group > * {
        opacity: 1;
        transform: none;
        transition: none;
    }
    html { scroll-behavior: auto; }
    .fv__scroll-hint { animation: none; }
}

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 1023px) {
    .about__content { grid-template-columns: 1fr; }
    .diff-compare { grid-template-columns: 1fr 1fr; }
    .curriculum-flow { grid-template-columns: 1fr 1fr; }
    .curriculum-flow--five { grid-template-columns: repeat(3, 1fr); }
    .curriculum-step:not(:last-child)::after { display: none; }
    .service-grid--photo { grid-template-columns: 1fr 1fr; }
    .instructor {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .instructor__photo-wrap {
        display: flex;
        justify-content: center;
        margin-bottom: 24px;
    }
    .instructor__photo { width: 200px; height: 200px; }
    .instructor__photo-wrap::before { width: 216px; height: 216px; }
    .instructor__stats { justify-content: center; }
}

@media (max-width: 767px) {
    .fv {
        min-height: auto;
        padding-top: calc(var(--header-height) + 64px);
        padding-bottom: 48px;
    }
    .fv__heading { font-size: clamp(24px, 7vw, 36px); }
    .fv__problems { gap: 8px; }
    .fv__problem-tag { font-size: 0.8125rem; padding: 6px 14px; }
    .fv__problem-tag:nth-child(2),
    .fv__problem-tag:nth-child(4) { display: none; }
    .fv__scroll-hint { display: none; }

    .about__content { grid-template-columns: 1fr; }
    .diff-compare { grid-template-columns: 1fr; }

    .section--results .stats-grid { grid-template-columns: 1fr; gap: 20px; max-width: 280px; }
    .stat-item__number { font-size: clamp(36px, 12vw, 48px); }
    .stat-item:not(:last-child)::after { display: none; }
    .stat-item:not(:last-child) { padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.15); }
    .voice-grid { grid-template-columns: 1fr; }

    .curriculum-flow { grid-template-columns: 1fr; }
    .curriculum-flow--five { grid-template-columns: repeat(2, 1fr); }
    .curriculum-step:not(:last-child)::after { display: none; }
    .course-grid { grid-template-columns: 1fr; }
    .service-grid--photo { grid-template-columns: 1fr; }
    .service-card__photo { height: 180px; }

    .instructor { grid-template-columns: 1fr; }
    .instructor__photo { width: 160px; height: 160px; }
    .instructor__photo-wrap { padding-top: 0; }
    .instructor__photo-wrap::before { width: 176px; height: 176px; top: -8px; }
    .instructor__info { text-align: center; }

    .column-grid { grid-template-columns: 1fr; }
    .cta-cards { grid-template-columns: 1fr; }

    /* オープン講座レスポンシブ */
    .open-hero {
        padding: calc(var(--header-height) + 48px) 20px 48px;
    }
    .open-course {
        grid-template-columns: 1fr;
    }
    .open-course:nth-child(even) {
        direction: ltr;
    }
    .open-course__photo {
        min-height: 220px;
    }
    .open-course__body {
        padding: 32px 24px;
    }
    .open-cta__actions {
        flex-direction: column;
        align-items: center;
    }
}