/* ============================================
   東洋電設株式会社 - DX伴走支援サイト
   メインスタイルシート
   ============================================ */

/* ---- CSS Variables ---- */
:root {
    /* ブルー（メインカラー） - 東洋電設コーポレートカラー */
    --primary-color: #0066A1;
    --primary-light: #4A90C8;
    --primary-dark: #005A8C;
    --primary-darkest: #003D5C;
    
    /* アクセントオレンジ（CTAのみ） */
    --accent-color: #F57C00;
    --accent-hover: #FB8C00;
    
    /* テキストカラー */
    --text-dark: #333333;
    --text-gray: #555555;
    --text-light: #777777;
    
    /* 背景カラー */
    --bg-white: #FFFFFF;
    --bg-light: #FAFAFA;
    --bg-lightgray: #F5F5F5;
    --bg-lightblue: #F0F8FF;
    
    /* ボーダー・シャドウ */
    --border-color: #E0E0E0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.18);
    --shadow-blue: 0 4px 14px rgba(0, 102, 161, 0.25);
    
    /* トランジション・フォント */
    --transition: all 0.3s ease;
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
}

/* ---- Reset & Base Styles ---- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    line-height: 1.7;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ---- Container ---- */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ---- Section Styles ---- */
.section {
    padding: 6rem 0;
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-label.recommended {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

.section-description {
    font-size: 1.125rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-top: 1rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

/* ---- Buttons ---- */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn i {
    margin-right: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: #FFFFFF !important;
    box-shadow: 0 6px 20px rgba(245, 124, 0, 0.4);
    font-weight: 700;
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover), #FFA726);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(245, 124, 0, 0.6);
    color: #FFFFFF !important;
}

.btn-secondary {
    background-color: var(--bg-white);
    color: var(--primary-color) !important;
    border: 2px solid var(--primary-color);
    font-weight: 700;
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: #FFFFFF !important;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-blue);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
    display: block;
    margin-top: 2rem; /* 送信ボタンの上部余白を追加 */
    padding: 1.5rem 2rem; /* 上下のパディングをゆったりと */
}

.btn-plan {
    background-color: var(--bg-white);
    color: var(--primary-color) !important;
    border: 2px solid var(--primary-color);
}

.btn-plan:hover {
    background-color: var(--primary-color);
    color: #FFFFFF !important;
}

.btn-plan-featured {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: #FFFFFF !important;
    border: none;
}

.btn-plan-featured:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: #FFFFFF !important;
    box-shadow: var(--shadow-blue);
}

/* ---- Header / Navigation ---- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.nav-logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: #FFFFFF !important;
    border-radius: 50px;
    font-weight: 700;
}

.nav-cta:hover {
    background: linear-gradient(135deg, var(--accent-hover), #FFA726);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(245, 124, 0, 0.5);
    color: #FFFFFF !important;
}

.nav-cta::after {
    display: none;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 3px;
    transition: var(--transition);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* ---- Hero Section ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--bg-lightblue) 100%);
    padding-top: 80px;
    padding-bottom: 120px; /* スクロールインジケーターのスペース確保 */
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 900px;
}

.hero-subtitle {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 2rem;
}

.hero-highlight {
    color: var(--primary-color);
}

.hero-emphasis {
    position: relative;
    display: inline-block;
    color: var(--primary-color);
    font-size: 3.5rem;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 3rem;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2rem; /* CTAボタンとスクロールインジケーターの間に余白 */
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-light);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    animation: bounce 2s infinite;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
}

.scroll-indicator:hover {
    color: var(--primary-color);
}

.scroll-indicator i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* ---- Vision/Empathy Section ---- */
.vision {
    background-color: var(--bg-white);
}

.vision-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 3rem;
}

.vision-column {
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.vision-column-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.vision-column-title i {
    font-size: 1.75rem;
}

.vision-ideal .vision-column-title {
    color: var(--primary-color);
}

.vision-reality .vision-column-title {
    color: var(--text-gray);
}

.vision-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.vision-list li {
    display: flex;
    gap: 1rem;
    font-size: 1rem;
    line-height: 1.6;
}

.vision-list li i {
    flex-shrink: 0;
    margin-top: 0.25rem;
    font-size: 1.25rem;
}

.vision-ideal .vision-list i {
    color: var(--primary-color);
}

.vision-reality .vision-list i {
    color: var(--text-gray);
}

.vision-reality .vision-list strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.vision-reality .vision-list p {
    font-size: 0.95rem;
    color: var(--text-gray);
    line-height: 1.6;
}

.vision-message {
    margin-top: 3rem;
    padding: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-white);
    border-radius: 20px;
    text-align: center;
    font-size: 1.25rem;
    line-height: 1.8;
    box-shadow: var(--shadow-lg);
}

.vision-message strong {
    font-size: 1.4rem;
}

/* ---- Approach Section ---- */
.approach {
    background-color: var(--bg-lightblue);
}

.approach-content {
    max-width: 900px;
    margin: 0 auto;
}

.approach-text p {
    font-size: 1.125rem;
    color: var(--text-gray);
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.approach-highlight {
    padding: 2rem;
    background-color: var(--bg-lightgray);
    border-left: 4px solid var(--primary-color);
    border-radius: 10px;
    margin-top: 2rem;
}

.approach-highlight strong {
    color: var(--primary-color);
}

/* ---- Reasons Section ---- */
.reasons {
    background-color: var(--bg-white);
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reason-card {
    position: relative;
    background-color: var(--bg-white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.reason-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.reason-number {
    position: absolute;
    top: -15px;
    right: 2rem;
    font-size: 3rem;
    font-weight: 900;
    color: var(--primary-color);
    opacity: 0.15;
}

.reason-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-white);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-blue);
}

.reason-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.reason-badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--bg-white);
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: 20px;
    margin-bottom: 1rem;
}

.reason-badge.badge-green {
    background-color: #10B981;
}

.reason-badge.badge-blue {
    background-color: #3B82F6;
}

.reason-text {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ---- Solutions Section ---- */
.solutions {
    background-color: var(--bg-white);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.solution-card {
    background-color: var(--bg-lightgray);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.solution-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--bg-white);
    padding: 2rem;
}

.solution-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.solution-title {
    font-size: 1.4rem;
    font-weight: 700;
    line-height: 1.3;
}

.solution-role {
    padding: 1.5rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-dark);
    background-color: var(--bg-white);
}

.solution-features {
    padding: 0 2rem 1.5rem;
}

.solution-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.solution-features li:last-child {
    border-bottom: none;
}

.solution-features i {
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.feature-note {
    font-size: 0.85rem;
    color: var(--text-gray);
}

.solution-target,
.solution-effect {
    padding: 1.5rem 2rem;
    background-color: var(--bg-white);
    margin: 1.5rem;
    border-radius: 12px;
}

.solution-target h4,
.solution-effect h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.solution-target ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.solution-target li {
    font-size: 0.95rem;
    color: var(--text-gray);
    padding-left: 1.25rem;
    position: relative;
}

.solution-target li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.effect-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.effect-tag {
    padding: 0.5rem 1rem;
    background-color: var(--bg-lightgray);
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 20px;
}

/* ---- Steps Section ---- */
.steps {
    background: linear-gradient(135deg, var(--bg-lightblue) 0%, #FFFFFF 100%);
}

.steps-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.steps-timeline::before {
    content: '';
    position: absolute;
    left: 50px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--primary-color), var(--primary-light));
}

.step-item {
    position: relative;
    padding-left: 120px;
    margin-bottom: 3rem;
}

.step-number {
    position: absolute;
    left: 0;
    top: 0;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    box-shadow: var(--shadow-blue);
    z-index: 1;
}

.step-content {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.step-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.step-description {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.step-goal {
    padding: 1.5rem;
    background-color: var(--bg-lightgray);
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
}

.step-goal h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.step-goal ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.step-goal li {
    padding-left: 1.5rem;
    position: relative;
}

.step-goal li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* ---- Recommended Plan Section ---- */
.recommended-plan {
    background-color: var(--bg-white);
}

.phases {
    max-width: 900px;
    margin: 0 auto;
}

.phase-card {
    background-color: var(--bg-lightgray);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    border-left: 5px solid var(--border-color);
}

.phase-card.phase-main {
    border-left-color: var(--primary-color);
    background-color: var(--bg-white);
    box-shadow: var(--shadow-md);
}

.phase-header {
    margin-bottom: 1.5rem;
}

.phase-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.phase-purpose {
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.phase-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.phase-list li {
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-gray);
}

.phase-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.phase-example {
    font-size: 0.95rem;
    color: var(--text-light);
    padding-left: 2.5rem !important;
}

.phase-deliverables {
    padding: 1.25rem;
    background-color: rgba(245, 124, 0, 0.05);
    border-radius: 10px;
}

.phase-deliverables h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.deliverable-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--bg-white);
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 20px;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    border: 1px solid var(--primary-color);
}

/* ---- Plans Section ---- */
.plans {
    background-color: var(--bg-light);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.plan-card {
    position: relative;
    background-color: var(--bg-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.plan-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.plan-featured {
    border: 3px solid var(--primary-color);
}

.plan-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-white);
    font-size: 0.8rem;
    font-weight: 700;
    border-radius: 20px;
    z-index: 1;
}

.plan-header {
    padding: 2.5rem 2rem;
    background: linear-gradient(135deg, rgba(245, 124, 0, 0.05), rgba(251, 140, 0, 0.02));
    text-align: center;
}

.plan-name {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.plan-target {
    font-size: 1rem;
    color: var(--text-gray);
    line-height: 1.6;
}

.plan-content {
    padding: 2rem;
}

.plan-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.plan-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.plan-features i {
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.plan-option {
    padding: 1rem;
    background-color: var(--bg-lightgray);
    border-radius: 8px;
    font-size: 0.95rem;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

/* ---- Diagnosis CTA Section ---- */
.diagnosis-cta {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    color: var(--bg-white);
}

.diagnosis-box {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.diagnosis-icon {
    width: 100px;
    height: 100px;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto 2rem;
}

.diagnosis-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--bg-white);
    margin-bottom: 1rem;
}

.diagnosis-description {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.95;
}

.diagnosis-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
}

.diagnosis-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.diagnosis-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.diagnosis-feature i {
    font-size: 2.5rem;
}

.diagnosis-feature span {
    font-size: 1rem;
    font-weight: 600;
}

.diagnosis-cta-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.diagnosis-cta-buttons .btn {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: #FFFFFF !important;
    border: none;
    box-shadow: 0 6px 20px rgba(245, 124, 0, 0.4);
    font-weight: 700;
    font-size: 1.125rem;
    padding: 1.25rem 2.5rem;
}

.diagnosis-cta-buttons .btn:hover {
    background: linear-gradient(135deg, var(--accent-hover), #FFA726);
    color: #FFFFFF !important;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(245, 124, 0, 0.6);
}

.diagnosis-cta-buttons .btn-secondary {
    background-color: var(--bg-white);
    color: #FFFFFF !important; /* 白文字に変更 */
    border: 3px solid var(--bg-white);
    font-weight: 700;
    font-size: 1.125rem;
    padding: 1.25rem 2.5rem;
}

.diagnosis-cta-buttons .btn-secondary:hover {
    background-color: var(--bg-white);
    color: var(--primary-dark) !important;
    border-color: var(--bg-white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

/* ---- FAQ Section ---- */
.faq {
    background-color: var(--bg-light);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-white);
    margin-bottom: 1rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    background-color: var(--bg-white);
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--bg-lightgray);
}

.faq-question i {
    font-size: 1.25rem;
    color: var(--primary-light);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 2rem 1.5rem;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ---- Contact Section ---- */
.contact {
    background-color: var(--bg-white);
}

.contact-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--bg-lightgray);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.required {
    color: var(--accent-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    background-color: var(--bg-white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(245, 124, 0, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ---- Company Info Section ---- */
.company-info {
    background-color: var(--bg-lightgray);
    padding: 4rem 0;
}

.company-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.company-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.5;
    margin-bottom: 1.5rem;
}

.company-message p {
    font-size: 1.125rem;
    color: var(--text-gray);
    line-height: 1.8;
}

.company-details h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 2rem;
}

.company-list {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem 2rem;
}

.company-list dt {
    font-weight: 700;
    color: var(--text-dark);
}

.company-list dd {
    color: var(--text-gray);
}

/* ---- Footer ---- */
.footer {
    background: linear-gradient(135deg, var(--primary-darkest), var(--primary-dark));
    color: var(--bg-white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    width: 180px;
    margin-bottom: 1.5rem;
}

.footer-text {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--bg-white);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-contact li {
    display: flex;
    gap: 1rem;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
    color: var(--primary-light);
    margin-top: 0.25rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-partner {
    color: rgba(255, 255, 255, 0.5);
}

/* ---- Scroll to Top Button ---- */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--bg-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-blue);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(0, 102, 161, 0.4);
}

/* ---- Responsive Styles ---- */

/* Tablet */
@media (max-width: 1024px) {
    .section {
        padding: 4rem 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero {
        padding-bottom: 100px;
    }

    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-cta {
        margin-bottom: 2.5rem;
    }
    
    .scroll-indicator {
        bottom: 2rem;
    }

    .vision-grid,
    .company-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .footer-col-1 {
        grid-column: 1 / -1;
    }

    .steps-timeline::before {
        left: 40px;
    }

    .step-item {
        padding-left: 100px;
    }

    .step-number {
        width: 80px;
        height: 80px;
        font-size: 0.9rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .container {
        padding: 0 1.5rem;
    }

    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: var(--bg-white);
        flex-direction: column;
        justify-content: flex-start;
        padding: 6rem 2rem 2rem;
        gap: 1.5rem;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-link {
        font-size: 1.25rem;
        width: 100%;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-cta {
        width: 100%;
        text-align: center;
    }

    /* Hero */
    .hero {
        min-height: 600px;
        padding-bottom: 100px; /* モバイルでもスクロールインジケーター用のスペース確保 */
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-emphasis {
        font-size: 2.5rem;
    }

    .hero-description {
        font-size: 1.125rem;
    }

    .hero-cta {
        flex-direction: column;
        margin-bottom: 3rem; /* モバイルでCTAとスクロールインジケーターの間隔を広げる */
    }

    .hero-cta .btn {
        width: 100%;
    }
    
    .scroll-indicator {
        bottom: 1.5rem; /* モバイルでは少し上に */
        font-size: 0.7rem;
    }
    
    .scroll-indicator i {
        font-size: 1.1rem;
    }
    
    .btn-primary,
    .btn-secondary,
    .nav-cta {
        font-size: 0.95rem;
        padding: 0.9rem 1.75rem;
    }

    /* Solutions */
    .solutions-grid {
        grid-template-columns: 1fr;
    }

    /* Plans */
    .plans-grid {
        grid-template-columns: 1fr;
    }

    /* Steps */
    .steps-timeline::before {
        left: 20px;
    }

    .step-item {
        padding-left: 70px;
    }

    .step-number {
        width: 60px;
        height: 60px;
        font-size: 0.75rem;
    }

    /* Contact */
    .contact-form {
        padding: 2rem 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    /* Diagnosis */
    .diagnosis-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .diagnosis-cta-buttons {
        flex-direction: column;
    }

    .diagnosis-cta-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }

    .hero-emphasis {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .diagnosis-title {
        font-size: 2rem;
    }

    .reasons-grid {
        grid-template-columns: 1fr;
    }
}