/* リセット・基本設定 */
* {
    box-sizing: border-box;
}

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

body {
    font-family: 'Noto Sans JP', Arial, sans-serif;
    color: #222;
    background: #fff;
    margin: 0;
    line-height: 1.7;
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}


/* ヘッダー - 左上ロゴ配置版 */
header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: #fff;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: relative;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: flex-start;
    gap: 2rem;
}

.header-logo {
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.4rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.header-logo:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.logo-image {
    height: 30px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
    border-radius: 6px;
}

.logo-image:hover {
    transform: scale(1.05);
}

.header-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.header-text {
    text-align: center;
}

.header-text h1 {
    margin: 0;
    font-size: clamp(1.2rem, 3.5vw, 1.8rem);
    font-weight: 700;
    line-height: 1.3;
}

.header-text h1 span {
    font-size: 0.75em;
    font-weight: 500;
    opacity: 0.9;
    display: block;
    margin-top: 0.3rem;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.8rem;
}

nav ul li {
    margin: 0;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    display: block;
    border: 2px solid transparent;
    font-size: 0.9rem;
}

nav ul li a:hover,
nav ul li a:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.3);
    outline: none;
    transform: translateY(-2px);
}

/* メインコンテンツ */
main {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 0 1rem;
}

section {
    margin-bottom: 4rem;
}

/* 見出し */
h2 {
    border-left: 6px solid #0a3a6b;
    padding-left: 1rem;
    font-size: clamp(1.3rem, 3vw, 1.8rem);
    margin-bottom: 2rem;
    font-weight: 700;
    color: #0a3a6b;
}

h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #0a3a6b;
    font-weight: 600;
}

/* about-headingセクション */
/* #about-heading — 矢印をはみ出させたいので overflow を visible に */
#about-heading {
  position: relative;
  width: 100vw;
  height: 60vh;
  min-height: 400px;
  overflow: visible;     /* ← hidden から変更 */
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: calc(-50vw + 50%);
}

/* ヒーロー画像 */
.about-hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

/* 暗いオーバーレイ */
.about-content-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
  z-index: 2;
}

/* テキストオーバーレイ */
.hero-text-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  color: #fff;
  font-size: 2.2rem;
  font-weight: bold;
  text-align: center;
  pointer-events: none;
}

/* ▼ 下向き矢印 (最前面) ▼ */
.scroll-arrow {
  position: absolute;
  bottom: -50px;          /* ヒーローセクションより下に少しはみ出す */
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 80px;
  z-index: 9999;          /* 他要素より確実に前面 */
  animation: bounce 2s infinite;
}

/* 矢印の装飾 */
.arrow-container {
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.95);
  border: 4px solid #0a3a6b;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.arrow-line {
  width: 4px;
  height: 24px;
  background: #0a3a6b;
}

.arrow-point {
  font-size: 1.8rem;
  color: #0a3a6b;
  line-height: 1;
  font-weight: bold;
}

/* シンプルなバウンスアニメーション */
@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40%                      { transform: translateX(-50%) translateY(-15px); }
  60%                      { transform: translateX(-50%) translateY(-8px); }
}


/* ヒーローテキストセクション */
#hero-text {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    padding: 4rem 0;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    position: relative;
    margin-top: 0;
}

.hero-text-content {
    width: 100%;
    padding: 0 3rem;
    display: flex;
    justify-content: center;
}

.hero-text-wrapper {
    max-width: 1200px;
    width: 100%;
    text-align: center;
}

.hero-text-wrapper h2 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: #0a3a6b;
    margin-bottom: 3rem;
    border: none;
    padding: 0;
    line-height: 1.3;
}

.hero-text-main {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.hero-lead {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    line-height: 1.8;
    color: #333;
    margin: 0;
    max-width: 900px;
    margin: 0 auto;
    font-weight: 500;
}

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

.hero-feature {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 2rem;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.hero-feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.hero-feature-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(10, 58, 107, 0.3);
}

.hero-feature-content {
    flex: 1;
    text-align: left;
}

.hero-feature-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #0a3a6b;
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.hero-feature-content p {
    font-size: 1rem;
    color: #666;
    margin: 0;
    line-height: 1.6;
}

/* 課題セクション */
#current-challenges {
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    padding: 4rem 0;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    position: relative;
    margin-top: 0;
}

.challenges-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.challenges-container h2 {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: #0a3a6b;
    margin-bottom: 3rem;
    border: none;
    padding: 0;
    line-height: 1.3;
    position: relative;
}

.challenges-container h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    border-radius: 2px;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.challenge-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.challenge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.challenge-card:hover::before {
    transform: scaleX(1);
}

.challenge-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.challenge-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    position: relative;
    border-radius: 8px 8px 0 0;
}

.challenge-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease;
    margin: 0;
    border-radius: 0;
    box-shadow: none;
    display: block;
    opacity: 1;
    visibility: visible;
}

.challenge-card:hover .challenge-img {
    transform: scale(1.05);
}

.challenge-content {
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.challenge-content h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #0a3a6b;
    margin: 0 0 1rem 0;
    line-height: 1.3;
    text-align: center;
}

.challenge-content p {
    font-size: 0.95rem;
    color: #333;
    line-height: 1.6;
    margin: 0 0 1.5rem 0;
    flex: 1;
}

.challenge-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #0a3a6b;
}

.status-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-value {
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.3rem 0.8rem;
    border-radius: 12px;
    color: white;
    text-align: center;
    min-width: 40px;
}

.status-value.high {
    background: linear-gradient(135deg, #dc3545 0%, #e74c3c 100%);
}

.status-value.medium {
    background: linear-gradient(135deg, #ffc107 0%, #f39c12 100%);
}

.status-value.low {
    background: linear-gradient(135deg, #28a745 0%, #2ecc71 100%);
}

/* 特徴セクション */
.features-list {
    counter-reset: feature-counter;
    padding-left: 0;
    list-style: none;
}

.feature-item {
    counter-increment: feature-counter;
    margin-bottom: 3rem;
    padding: 2.5rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    border-left: 6px solid #0a3a6b;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    list-style: none;
}

.feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.feature-item::before {
    content: counter(feature-counter);
    position: absolute;
    top: -15px;
    left: -15px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.4rem;
    box-shadow: 0 4px 15px rgba(10, 58, 107, 0.3);
}

.feature-content {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
}

.feature-text {
    flex: 1;
    min-width: 0;
}

.feature-text h3 {
    margin-top: 0;
    font-size: 1.4rem;
    color: #0a3a6b;
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.feature-text ul {
    margin: 0;
    padding-left: 1.5rem;
}

.feature-text ul li {
    margin-bottom: 0.8rem;
    padding-left: 0.5rem;
    position: relative;
    line-height: 1.6;
}

.feature-text ul li::before {
    content: "✓";
    position: absolute;
    left: -1.5rem;
    color: #28a745;
    font-weight: bold;
    font-size: 1.1rem;
}

.feature-image {
    flex: 0 0 300px;
    display: flex;
    align-items: center;
}

.feature-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    margin: 0;
}

.feature-image img:hover {
    transform: scale(1.03);
}

.feature-item:nth-child(odd) .feature-content {
    flex-direction: row-reverse;
}

/* ラインナップセクション */
#lineup {
    padding: 4rem 0;
    background: #fff;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    position: relative;
}

#lineup h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    color: #0a3a6b;
    border: none;
    padding: 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.lineup-list {
    display: flex;
    gap: 1.5rem;
    width: 100%;
    padding: 0 2rem;
    justify-content: center;
    align-items: stretch;
    max-width: none;
    margin: 0;
}

.lineup-item {
    flex: 1;
    max-width: 350px;
    min-width: 250px;
    background: #fff;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.lineup-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
}

.lineup-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.lineup-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin: 0 0 1.5rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.lineup-item:hover .lineup-image {
    transform: scale(1.02);
}

.lineup-item h3 {
    color: #0a3a6b;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 0.5rem;
    font-weight: 700;
    line-height: 1.3;
}

.lineup-item p {
    color: #333;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
    font-size: 0.95rem;
}

.lineup-features {
    margin-top: auto;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.feature-tag {
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(10, 58, 107, 0.3);
}

.lineup-item:hover .feature-tag {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(10, 58, 107, 0.4);
}

/* 活用事例セクション - 画像上余白削除版 */
#usage-cases {
    padding: 4rem 0;
    background: #f8f9fa;
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    position: relative;
    overflow: hidden;
}

#usage-cases h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    color: #0a3a6b;
    border: none;
    padding: 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.usage-cases-carousel {
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 650px;
    perspective: 1000px;
    padding: 0 2rem;
}

.usage-case-card {
    position: absolute;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    width: 400px;
    height: 600px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0;
    transform: translateX(0) scale(0.8);
    z-index: 1;
    pointer-events: none;
    padding: 0; /* カード全体のパディングを削除 */
}

.usage-case-card.active {
    opacity: 1;
    transform: translateX(0) scale(1);
    z-index: 10;
    pointer-events: auto;
}

.usage-case-card.prev {
    opacity: 0.3;
    transform: translateX(-450px) scale(0.85);
    z-index: 5;
    pointer-events: auto;
}

.usage-case-card.next {
    opacity: 0.3;
    transform: translateX(450px) scale(0.85);
    z-index: 5;
    pointer-events: auto;
}

/* 活用事例カード画像 - 上余白削除版 */
.case-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    position: relative;
    overflow: hidden;
    margin-top: 0; /* 上余白を削除 */
    border-radius: 12px 12px 0 0; /* 上部の角丸を維持 */
}

/* 実際の画像がある場合の上余白も削除 */
.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    margin-top: 0; /* 画像の上余白を削除 */
    border-radius: 12px 12px 0 0; /* 上部の角丸を維持 */
}

.case-placeholder {
    text-align: center;
    z-index: 2;
    margin-top: 0; /* プレースホルダーの上余白も削除 */
}

.case-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

/* カードコンテンツエリア - 上余白削除版 */
.case-content {
    padding: 2rem;
    height: calc(100% - 220px);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    margin-top: 0; /* コンテンツエリアの上余白を削除 */
}

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

.case-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.case-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #0a3a6b;
    line-height: 1.3;
}

/* result-highlight 見切れ修正 */
.case-result {
    margin-bottom: 1.5rem;
    padding: 1.2rem;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    border-radius: 8px;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-result::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: resultShine 4s infinite;
}

@keyframes resultShine {
    0% { left: -100%; }
    100% { left: 100%; }
}

.result-highlight {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    position: relative;
    z-index: 2;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    max-width: 100%;
    white-space: normal;
    text-overflow: clip;
}

.case-details {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex: 1;
}

.case-detail-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.detail-label {
    font-size: 0.8rem;
    color: #666;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-value {
    font-size: 0.9rem;
    color: #333;
    line-height: 1.5;
    padding: 0.8rem;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #0a3a6b;
    transition: all 0.3s ease;
}

.usage-case-card:hover .detail-value {
    background: #e9ecef;
    border-left-color: #1e5a8a;
}

/* カルーセルナビゲーション */
.carousel-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid #0a3a6b;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.carousel-nav-btn:hover {
    background: #0a3a6b;
    transform: translateY(-50%) scale(1.1);
}

.carousel-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: translateY(-50%) scale(0.9);
}

.carousel-prev {
    left: 50px;
}

.carousel-next {
    right: 50px;
}

.nav-arrow {
    font-size: 2.2rem;
    font-weight: bold;
    color: #0a3a6b;
    transition: color 0.3s ease;
}

.carousel-nav-btn:hover .nav-arrow {
    color: white;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    position: relative;
    z-index: 15;
}

.indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid #0a3a6b;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #0a3a6b;
    transform: scale(1.3);
}

.indicator:hover {
    background: rgba(10, 58, 107, 0.5);
}

.autoplay-progress {
    position: relative;
    height: 4px;
    background: rgba(10, 58, 107, 0.2);
    width: 100%;
    max-width: 600px;
    margin: 1.5rem auto 0;
    overflow: hidden;
    border-radius: 2px;
}

.autoplay-progress-bar {
    height: 100%;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    width: 0%;
    transition: width 0.1s linear;
    border-radius: 2px;
}

/* 施工実績セクション - 6枚カード版・画像上余白削除版 */
#construction-results {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    position: relative;
    overflow: hidden;
}

#construction-results h2 {
    text-align: center;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    color: #0a3a6b;
    border: none;
    padding: 0;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.results-carousel {
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 650px;
    perspective: 1000px;
    padding: 0 2rem;
}

/* 施工実績カード - 画像上余白削除版 */
.results-card {
    position: absolute;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    width: 400px;
    height: 600px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    opacity: 0;
    transform: translateX(0) scale(0.8);
    z-index: 1;
    pointer-events: none;
    padding: 0;
    cursor: pointer;
}

.results-card.active {
    opacity: 1;
    transform: translateX(0) scale(1);
    z-index: 10;
    pointer-events: auto;
}

.results-card.prev {
    opacity: 0.3;
    transform: translateX(-450px) scale(0.85);
    z-index: 5;
    pointer-events: auto;
}

.results-card.next {
    opacity: 0.3;
    transform: translateX(450px) scale(0.85);
    z-index: 5;
    pointer-events: auto;
}

.results-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(10, 58, 107, 0.2);
}

/* 施工実績カード画像 - 上余白削除版 */
.results-card-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    position: relative;
    overflow: hidden;
    margin-top: 0;
    border-radius: 12px 12px 0 0;
}

/* 実際の画像の上余白削除 */
.results-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.3s ease, opacity 0.3s ease;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    margin-top: 0;
    border-radius: 12px 12px 0 0;
}

.results-card-img:hover {
    transform: scale(1.05);
}

.results-placeholder {
    text-align: center;
    z-index: 1;
    font-size: 3rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    opacity: 1;
    transition: opacity 0.3s ease;
}

/* 画像読み込み失敗時の処理 */
.results-card-img:not([src]),
.results-card-img[src=""],
.results-card-img[alt=""] {
    opacity: 0;
}

.results-card-img:not([src]) ~ .results-placeholder,
.results-card-img[src=""] ~ .results-placeholder,
.results-card-img[alt=""] ~ .results-placeholder {
    opacity: 1;
}

.results-card-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: resultsShimmer 3s infinite;
}

@keyframes resultsShimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

/* カードコンテンツエリア - 上余白削除版 */
.results-card-content {
    padding: 2rem;
    height: calc(100% - 220px);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    margin-top: 0;
}

.results-card-header {
    margin-bottom: 1.5rem;
}

.results-card-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.results-card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #0a3a6b;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.results-card-description {
    font-size: 0.95rem;
    color: #333;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
}

.results-card-stats {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.results-stat-item {
    background: #f8f9fa;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #0a3a6b;
    border: 1px solid #e9ecef;
}

.results-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.95);
    border: 2px solid #0a3a6b;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 20;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.results-nav-btn:hover {
    background: #0a3a6b;
    transform: translateY(-50%) scale(1.1);
}

.results-prev {
    left: 50px;
}

.results-next {
    right: 50px;
}

.results-nav-arrow {
    font-size: 2.2rem;
    font-weight: bold;
    color: #0a3a6b;
    transition: color 0.3s ease;
}

.results-nav-btn:hover .results-nav-arrow {
    color: white;
}

.results-indicators {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    position: relative;
    z-index: 15;
}

.results-indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid #0a3a6b;
    background: transparent;
    cursor: pointer;
    transition: all 0.3s ease;
}

.results-indicator.active {
    background: #0a3a6b;
    transform: scale(1.3);
}

.results-indicator:hover {
    background: rgba(10, 58, 107, 0.5);
}

.results-progress {
    position: relative;
    height: 4px;
    background: rgba(10, 58, 107, 0.2);
    width: 100%;
    max-width: 600px;
    margin: 1.5rem auto 0;
    overflow: hidden;
    border-radius: 2px;
}

.results-progress-bar {
    height: 100%;
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    width: 0%;
    transition: width 0.1s linear;
    border-radius: 2px;
}

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .results-carousel {
        height: 500px;
        padding: 0 1rem;
    }
    
    .results-card {
        width: 280px;
        height: 450px;
    }
    
    .results-card.prev {
        transform: translateX(-250px) scale(0.7);
        opacity: 0.2;
    }
    
    .results-card.next {
        transform: translateX(250px) scale(0.7);
        opacity: 0.2;
    }
    
    .results-card-image {
        height: 180px;
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .results-card-img {
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .results-card-content {
        height: calc(100% - 180px);
        margin-top: 0;
    }
}

@media (max-width: 480px) {
    .results-card-image {
        height: 150px;
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .results-card-img {
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .results-card-content {
        height: calc(100% - 150px);
        margin-top: 0;
        padding: 1rem;
    }
}

/* Q&Aセクション */
.qa-container {
    max-width: 100%;
}

.qa-item {
    border: 1px solid #e9ecef;
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

.qa-item:hover {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.qa-question {
    width: 100%;
    background: #fff;
    border: none;
    padding: 1.5rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: #0a3a6b;
    transition: all 0.3s ease;
    position: relative;
}

.qa-question:hover {
    background: #f8f9fa;
}

.qa-question:focus {
    outline: 2px solid #0a3a6b;
    outline-offset: -2px;
}

.qa-question[aria-expanded="true"] {
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    color: white;
}

.qa-question-text {
    flex: 1;
    padding-right: 1rem;
    line-height: 1.4;
}

.qa-icon {
    font-size: 1.5rem;
    font-weight: bold;
    color: #0a3a6b;
    transition: all 0.3s ease;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(10, 58, 107, 0.1);
}

.qa-question[aria-expanded="true"] .qa-icon {
    color: white;
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(45deg);
}

.qa-answer {
    background: #f8f9fa;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
    opacity: 0;
}

.qa-answer.active {
    padding: 1.5rem;
    max-height: 200px;
    opacity: 1;
}

.qa-answer p {
    margin: 0;
    color: #333;
    line-height: 1.6;
}

/* コンタクトセクション */
.contact-intro {
    text-align: center;
    margin-bottom: 3rem;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
}

.contact-message {
    font-size: 1.5rem;
    font-weight: 600;
    color: #0a3a6b;
    margin-bottom: 1.5rem;
}

.contact-intro p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: #333;
}

.contact-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2.5rem;
    flex-wrap: wrap;
}

.contact-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem 1.2rem;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.contact-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.contact-btn:hover::before {
    left: 100%;
}

.contact-btn.phone {
    background: linear-gradient(135deg, #28a745 0%, #34c759 100%);
    color: white;
    border: 2px solid transparent;
}

.contact-btn.phone:hover,
.contact-btn.phone:focus {
    background: linear-gradient(135deg, #218838 0%, #28a745 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
    outline: none;
}

.contact-btn.email {
    background: linear-gradient(135deg, #0a3a6b 0%, #1e5a8a 100%);
    color: white;
    border: 2px solid transparent;
}

.contact-btn.email:hover,
.contact-btn.email:focus {
    background: linear-gradient(135deg, #1e5a8a 0%, #2a6a9a 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(10, 58, 107, 0.3);
    outline: none;
}

.contact-btn.form {
    background: linear-gradient(135deg, #ff6b35 0%, #ff8e53 100%);
    color: white;
    border: 2px solid transparent;
}

.contact-btn.form:hover,
.contact-btn.form:focus {
    background: linear-gradient(135deg, #e55a2e 0%, #ff6b35 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.3);
    outline: none;
}

.btn-icon {
    font-size: 2rem;
    transition: transform 0.3s ease;
    line-height: 1;
}

.contact-btn:hover .btn-icon {
    transform: scale(1.1);
}

.btn-text {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.btn-detail {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
    line-height: 1.2;
}

/* 画像 */
img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 2rem auto;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

/* フッター */
footer {
    background: linear-gradient(135deg, #1a2332 0%, #2c3e50 100%);
    color: #fff;
    padding: 3rem 0 1rem 0;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    justify-content: center;
    flex-wrap: wrap;
    text-align: center;
}

.footer-logo {
    flex-shrink: 0;
}

.footer-logo-image {
    height: 50px;
    width: auto;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.footer-logo-image:hover {
    transform: scale(1.05);
}

.footer-info {
    flex: 1;
    min-width: 250px;
    text-align: center;
}

.footer-info h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    text-align: center;
}

.footer-info p {
    margin: 0;
    font-size: 1rem;
    opacity: 0.9;
    line-height: 1.4;
    text-align: center;
}

.footer-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-section {
    text-align: center;
}

.footer-section h4 {
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.footer-section p {
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.6;
    opacity: 0.9;
    text-align: center;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    justify-content: center;
}

.contact-icon {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
}

.footer-section a {
    color: #e8f4fd;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.2rem 0;
    border-bottom: 1px solid transparent;
}

.footer-section a:hover,
.footer-section a:focus {
    color: #ffffff;
    border-bottom-color: rgba(232, 244, 253, 0.6);
    outline: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 0.2rem 0.5rem;
}

.contact-item a {
    font-weight: 600;
    letter-spacing: 0.3px;
}

.contact-item a:hover {
    transform: translateX(3px);
}

.footer-copyright {
    text-align: center;
    padding-top: 1.5rem;
}

.footer-copyright p {
    margin: 0;
    font-size: 0.9rem;
    opacity: 0.8;
    text-align: center;
}

/* フォーカス表示 */
*:focus {
    outline: 2px solid #0a3a6b;
    outline-offset: 2px;
}

/* キーボードナビゲーション用スタイル */
.keyboard-navigation *:focus {
    outline: 3px solid #0a3a6b !important;
    outline-offset: 2px !important;
}

nav a.active {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.error {
    border-color: #dc3545 !important;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25) !important;
}

/* レスポンシブデザイン */
@media (max-width: 1400px) {
    .lineup-list {
        gap: 1.2rem;
        padding: 0 1.5rem;
    }
    
    .lineup-item {
        max-width: 320px;
        min-width: 220px;
        padding: 1.8rem;
    }
    
    .usage-case-card {
        width: 350px;
        height: 550px;
    }
    
    .usage-case-card.prev {
        transform: translateX(-380px) scale(0.8);
    }
    
    .usage-case-card.next {
        transform: translateX(380px) scale(0.8);
    }
    
    .results-card {
        width: 350px;
        height: 550px;
    }
    
    .results-card.prev {
        transform: translateX(-380px) scale(0.8);
    }
    
    .results-card.next {
        transform: translateX(380px) scale(0.8);
    }
}

@media (max-width: 1200px) {
    .challenges-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .challenges-container {
        padding: 0 1.5rem;
    }
    
    .lineup-item {
        max-width: 280px;
        min-width: 200px;
        padding: 1.5rem;
    }
}

@media (max-width: 1024px) {
    .hero-text-content {
        padding: 0 2rem;
    }
    
    .hero-text-features {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .lineup-list {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .lineup-item {
        flex: 0 1 calc(50% - 0.5rem);
        max-width: 400px;
        min-width: 280px;
    }
    
    .usage-case-card {
        width: 320px;
        height: 500px;
    }
    
    .usage-case-card.prev {
        transform: translateX(-320px) scale(0.75);
    }
    
    .usage-case-card.next {
        transform: translateX(320px) scale(0.75);
    }
    
    .contact-buttons {
        gap: 1.2rem;
    }
    
    .contact-btn {
        min-width: 180px;
        padding: 1.3rem 1rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .header-logo {
        align-self: flex-start;
        padding: 0.3rem;
    }
    
    .logo-image {
        height: 25px;
    }
    
    .header-main {
        width: 100%;
        gap: 1rem;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0.4rem;
    }
    
    nav ul li a {
        padding: 0.3rem 0.6rem;
        font-size: 0.85rem;
    }
    
    #about-heading {
        height: 50vh;
        min-height: 350px;
    }
    
    .about-content-overlay {
        padding: 1.5rem;
    }
    
    .scroll-arrow {
        width: 70px;
        height: 70px;
        bottom: -45px;
    }
    
    .arrow-line {
        height: 20px;
        width: 3px;
    }
    
    .arrow-point {
        font-size: 1.6rem;
    }
    
    #hero-text {
        padding: 3rem 0;
    }
    
    .hero-text-content {
        padding: 0 1rem;
    }
    
    .hero-feature {
        padding: 1.5rem;
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .hero-feature-content {
        text-align: center;
    }
    
    .hero-feature-number {
        width: 50px;
        height: 50px;
        font-size: 1rem;
        align-self: center;
    }
    
    #current-challenges {
        padding: 3rem 0;
    }
    
    .challenges-container {
        padding: 0 1rem;
    }
    
    .challenges-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-content {
        flex-direction: column !important;
        gap: 1.5rem;
    }
    
    .feature-image {
        flex: none;
        width: 100%;
    }
    
    .feature-item {
        padding: 2rem;
    }
    
    .feature-item::before {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        top: -12px;
        left: -12px;
    }
    
    #lineup {
        padding: 3rem 0;
    }
    
    .lineup-list {
        flex-direction: column;
        gap: 1.5rem;
        padding: 0 1rem;
    }
    
    .lineup-item {
        flex: none;
        max-width: none;
        min-width: auto;
        width: 100%;
        padding: 2rem;
    }
    
    .usage-cases-carousel {
        height: 500px;
        padding: 0 1rem;
    }
    
    .usage-case-card {
        width: 280px;
        height: 450px;
    }
    
    .usage-case-card.prev {
        transform: translateX(-250px) scale(0.7);
        opacity: 0.2;
    }
    
    .usage-case-card.next {
        transform: translateX(250px) scale(0.7);
        opacity: 0.2;
    }
    
    .case-result {
        min-height: 50px;
        padding: 1rem;
    }
    
    .result-highlight {
        font-size: 1rem;
        line-height: 1.3;
    }
    
    /* 活用事例カード画像 - レスポンシブ対応（画像上余白削除版） */
    .case-image {
        height: 180px;
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .case-image img {
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .case-content {
        height: calc(100% - 180px);
        margin-top: 0;
        padding: 1.5rem;
    }
    
    .carousel-nav-btn {
        width: 50px;
        height: 50px;
    }
    
    .nav-arrow {
        font-size: 1.6rem;
    }
    
    .carousel-prev {
        left: 10px;
    }
    
    .carousel-next {
        right: 10px;
    }
    
    .results-carousel {
        height: 500px;
        padding: 0 1rem;
    }
    
    .results-card {
        width: 280px;
        height: 450px;
    }
    
    .results-card.prev {
        transform: translateX(-250px) scale(0.7);
        opacity: 0.2;
    }
    
    .results-card.next {
        transform: translateX(250px) scale(0.7);
        opacity: 0.2;
    }
    
    .qa-question {
        padding: 1rem;
        font-size: 0.95rem;
    }
    
    .qa-answer.active {
        padding: 1rem;
    }
    
    .qa-icon {
        font-size: 1.3rem;
        width: 25px;
        height: 25px;
    }
    
    .contact-intro {
        padding: 2rem 1rem;
    }
    
    .contact-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .contact-btn {
        width: 100%;
        max-width: 320px;
        padding: 1.2rem 1rem;
    }
    
    .btn-icon {
        font-size: 1.6rem;
    }
    
    .btn-text {
        font-size: 0.95rem;
    }
    
    .btn-detail {
        font-size: 0.8rem;
    }
    
    footer {
        padding: 2rem 0 1rem 0;
    }
    
    .footer-container {
        padding: 0 1rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
        margin-bottom: 2rem;
    }
    
    .footer-details {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 1.5rem 0;
    }
    
    main {
        padding: 0 0.5rem;
    }
    
    .feature-item {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .header-container {
        gap: 0.8rem;
    }
    
    .logo-image {
        height: 22px;
    }
    
    #about-heading {
        height: 45vh;
        min-height: 300px;
    }
    
    .about-content-overlay {
        padding: 1rem;
    }
    
    .scroll-arrow {
        width: 60px;
        height: 60px;
        bottom: -40px;
    }
    
    .arrow-line {
        height: 16px;
        width: 3px;
    }
    
    .arrow-point {
        font-size: 1.4rem;
    }
    
    .hero-text-content {
        padding: 0 0.5rem;
    }
    
    .hero-feature {
        padding: 1rem;
    }
    
    .hero-feature-number {
        width: 45px;
        height: 45px;
        font-size: 0.9rem;
    }
    
    .challenges-container {
        padding: 0 0.5rem;
    }
    
    .challenge-image {
        height: 140px;
    }
    
    .challenge-content {
        padding: 1rem;
    }
    
    .challenge-content h3 {
        font-size: 1.1rem;
    }
    
    .challenge-content p {
        font-size: 0.85rem;
    }
    
    .challenge-status {
        padding: 0.6rem 0.8rem;
    }
    
    .status-label {
        font-size: 0.75rem;
    }
    
    .status-value {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }
    
    .feature-item {
        padding: 1.5rem;
    }
    
    .feature-text h3 {
        font-size: 1.2rem;
    }
    
    .feature-image img {
        height: 160px;
    }
    
    .feature-item::before {
        width: 35px;
        height: 35px;
        font-size: 1rem;
        top: -10px;
        left: -10px;
    }
    
    .lineup-list {
        padding: 0 0.5rem;
    }
    
    .lineup-item {
        padding: 1.5rem;
    }
    
    .lineup-image {
        height: 180px;
    }
    
    .feature-tag {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
    
    .usage-cases-carousel {
        height: 450px;
    }
    
    .usage-case-card {
        width: 260px;
        height: 400px;
    }
    
    .usage-case-card.prev,
    .usage-case-card.next {
        opacity: 0.1;
        transform: translateX(0) scale(0.6);
    }
    
    .case-result {
        min-height: 45px;
        padding: 0.8rem;
    }
    
    .result-highlight {
        font-size: 0.9rem;
        line-height: 1.2;
    }
    
    /* 活用事例カード画像 - レスポンシブ対応（画像上余白削除版） */
    .case-image {
        height: 150px;
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .case-image img {
        margin-top: 0;
        border-radius: 12px 12px 0 0;
    }
    
    .case-content {
        height: calc(100% - 150px);
        margin-top: 0;
        padding: 1rem;
    }
    
    .carousel-nav-btn {
        width: 45px;
        height: 45px;
    }
    
    .nav-arrow {
        font-size: 1.4rem;
    }
    
    .carousel-prev {
        left: 5px;
    }
    
    .carousel-next {
        right: 5px;
    }
    
    .results-carousel {
        height: 450px;
    }
    
    .results-card {
        width: 260px;
        height: 400px;
    }
    
    .results-card.prev,
    .results-card.next {
        opacity: 0.1;
        transform: translateX(0) scale(0.6);
    }
    
    .qa-question {
        padding: 0.8rem;
        font-size: 0.9rem;
    }
    
    .qa-question-text {
        padding-right: 0.5rem;
    }
    
    .qa-answer.active {
        padding: 0.8rem;
    }
    
    .contact-intro {
        padding: 1.5rem 0.8rem;
    }
    
    .contact-message {
        font-size: 1.2rem;
    }
    
    .contact-intro p {
        font-size: 1rem;
    }
    
    .contact-btn {
        max-width: 280px;
        padding: 1rem 0.8rem;
    }
    
    .btn-icon {
        font-size: 1.5rem;
    }
    
    .btn-text {
        font-size: 0.9rem;
    }
    
    .btn-detail {
        font-size: 0.75rem;
    }
    
    .footer-container {
        padding: 0 0.5rem;
    }
    
    .footer-content {
        gap: 1rem;
    }
    
    .footer-logo-image {
        height: 35px;
    }
    
    .contact-item {
        flex-direction: column;
        gap: 0.3rem;
        justify-content: center;
    }
    
    main {
        margin: 2rem auto;
    }
    
    section {
        margin-bottom: 3rem;
    }
}

/* 高解像度ディスプレイ対応 */
@media (min-width: 1400px) {
    .logo-image {
        height: 35px;
    }
    
    .header-logo {
        padding: 0.5rem;
    }
    
    .scroll-arrow {
        width: 100px;
        height: 100px;
        bottom: -60px;
    }
    
    .arrow-line {
        height: 30px;
        width: 5px;
    }
    
    .arrow-point {
        font-size: 2.2rem;
    }
    
    .arrow-container {
        border: 5px solid #0a3a6b;
    }
    
    .hero-text-content {
        padding: 0 4rem;
    }
    
    .hero-feature {
        padding: 2.5rem;
    }
    
    .hero-feature-number {
        width: 70px;
        height: 70px;
        font-size: 1.4rem;
    }
    
    .challenges-container {
        max-width: 1600px;
        padding: 0 3rem;
    }
    
    .challenges-grid {
        gap: 2.5rem;
    }
    
    .challenge-image {
        height: 200px;
    }
    
    .challenge-content {
        padding: 2.5rem;
    }
    
    .challenge-content h3 {
        font-size: 1.4rem;
    }
    
    .challenge-content p {
        font-size: 1rem;
    }
    
    .lineup-list {
        gap: 2rem;
        padding: 0 3rem;
    }
    
    .lineup-item {
        max-width: 380px;
        min-width: 300px;
        padding: 2.5rem;
    }
    
    .lineup-image {
        height: 220px;
    }
    
    .lineup-item h3 {
        font-size: 1.4rem;
    }
    
    .lineup-item p {
        font-size: 1rem;
    }
    
    .usage-case-card {
        width: 450px;
        height: 650px;
    }
    
    .usage-case-card.prev {
        transform: translateX(-550px) scale(0.9);
    }
    
    .usage-case-card.next {
        transform: translateX(550px) scale(0.9);
    }
    
    .carousel-prev {
        left: 80px;
    }
    
    .carousel-next {
        right: 80px;
    }
    
    .carousel-nav-btn {
        width: 80px;
        height: 80px;
    }
    
    .nav-arrow {
        font-size: 2.5rem;
    }
    
    .contact-buttons {
        gap: 2rem;
    }
    
    .contact-btn {
        min-width: 240px;
        padding: 1.8rem 1.5rem;
    }
    
    .btn-icon {
        font-size: 2.2rem;
    }
    
    .btn-text {
        font-size: 1.2rem;
    }
    
    .btn-detail {
        font-size: 1rem;
    }
}

/* 印刷用スタイル */
@media print {
    header {
        background: #0a3a6b !important;
        -webkit-print-color-adjust: exact;
    }
    
    .lineup-item {
        break-inside: avoid;
    }
    
    nav {
        display: none;
    }
}
