/* ========================================
   リセット & 基本設定
   モバイルファースト設計
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Clean & Trust カラースキーム */
    --primary-color: #1e3a5f;  /* ネイビー - 信頼感 */
    --secondary-color: #2c5282; /* ダークブルー */
    --accent-color: #4a90a4;    /* 淡いブルー - アースカラー */
    --accent-green: #7fb069;    /* 淡いグリーン - アースカラー */
    --accent-beige: #d9cab3;    /* ベージュ - アースカラー */
    --text-color: #2d3748;      /* ダークグレー */
    --text-light: #4a5568;
    --text-lighter: #718096;
    --bg-color: #ffffff;        /* ホワイト - 清潔感 */
    --bg-light: #f7fafc;        /* ライトグレー */
    --border-color: #e2e8f0;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

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

body {
    font-family: "Yu Gothic", "游ゴシック", YuGothic, "游ゴシック体", 'Noto Sans JP', sans-serif;
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: "palt";
}

/* ========================================
   ローディング画面
======================================== */
.pre-loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--primary-color);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.pre-loader.loaded {
    opacity: 0;
    visibility: hidden;
}

.loader-logo {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: clamp(60px, 10vw, 120px);
    font-weight: 900;
    color: white;
    letter-spacing: 0.02em;
    animation: loaderPulse 1.5s ease-in-out infinite;
}

@keyframes loaderPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

/* ========================================
   ページラッパー
======================================== */
.page-wrapper {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.page-wrapper.visible {
    opacity: 1;
}

/* ========================================
   ヘッダー（モバイルファースト）
======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 15px 20px;
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    padding: 15px 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
}

/* ロゴ */
.logo-text {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 24px;
    font-weight: 900;
    color: white;
    letter-spacing: 0.02em;
    display: inline-block;
}

.header.scrolled .logo-text {
    color: var(--primary-color);
}

.logo-text .char {
    display: inline-block;
    transition: var(--transition);
}

.logo a:hover .char {
    transform: translateY(-3px);
}

.logo a:hover .char:nth-child(2) {
    transition-delay: 0.05s;
}

.logo a:hover .char:nth-child(3) {
    transition-delay: 0.1s;
}

/* メインナビゲーション（モバイルファースト - デフォルトで隠す） */
.main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--primary-color);
    padding: 80px 30px 40px;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    overflow-y: auto;
}

.main-nav.mobile-open {
    right: 0;
}

.main-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.main-nav li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.main-nav a {
    display: block;
    padding: 18px 0;
    text-decoration: none;
    color: white;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.1em;
    transition: var(--transition);
}

.main-nav a:hover {
    color: var(--accent-color);
    transform: translateX(10px);
}

/* サブメニュー（モバイル） */
.main-nav .has-submenu {
    position: relative;
}

.main-nav .submenu {
    list-style: none;
    padding-left: 20px;
    margin-top: 0;
}

.main-nav .submenu li {
    border-bottom: none;
}

.main-nav .submenu a {
    padding: 12px 0;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.main-nav .submenu a:hover {
    color: var(--accent-color);
}

/* メニュートグル（モバイル - デフォルトで表示） */
.menu-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: white;
    transition: var(--transition);
    z-index: 1001;
    /* タップ領域を広げる */
    padding: 12px;
    margin: -12px;
    -webkit-tap-highlight-color: transparent;
}

.header.scrolled .menu-toggle {
    color: var(--primary-color);
}

.menu-text {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.menu-icon {
    width: 22px;
    height: 14px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.menu-icon span {
    width: 100%;
    height: 2px;
    background: white;
    transition: var(--transition);
    transform-origin: center;
}

.header.scrolled .menu-icon span {
    background: var(--primary-color);
}

/* メニューアクティブ時のアニメーション */
.menu-toggle.active .menu-icon span:first-child {
    transform: translateY(6px) rotate(45deg);
}

.menu-toggle.active .menu-icon span:last-child {
    transform: translateY(-6px) rotate(-45deg);
}

.menu-toggle.active .menu-text {
    opacity: 0;
}

/* ========================================
   ヒーローセクション
======================================== */
.hero-section {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-video-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 15, 44, 0.7) 0%, rgba(59, 130, 246, 0.5) 100%);
    z-index: 2;
}

.image-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.image-slider .slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center center;
    opacity: 0;
    transition: opacity 1.5s ease-in-out;
}

/* スマホ用：モバイル専用画像に切り替え */
@media (max-width: 767px) {
    .image-slider .slide {
        background-position: center center;
    }

    /* モバイル用画像に切り替え */
    .image-slider .slide:nth-child(1) {
        background-image: url('hero-image-1m.jpg') !important;
    }

    .image-slider .slide:nth-child(2) {
        background-image: url('hero-image-2m.jpg') !important;
    }

    .image-slider .slide:nth-child(3) {
        background-image: url('hero-image-3m.jpg') !important;
    }
}

.image-slider .slide.active {
    opacity: 1;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    color: white;
    padding: 0 20px;
}

.hero-logo {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: clamp(50px, 15vw, 180px);
    font-weight: 900;
    letter-spacing: 0.02em;
    margin-bottom: 30px;
    animation: heroFadeIn 1.2s ease-out;
}

.hero-logo .char {
    display: inline-block;
    animation: heroFloat 3s ease-in-out infinite;
}

.hero-logo .char:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-logo .char:nth-child(3) {
    animation-delay: 0.4s;
}

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

@keyframes heroFadeIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.hero-tagline-main {
    font-size: clamp(28px, 6vw, 56px);
    font-weight: 600;
    letter-spacing: 0.05em;
    line-height: 1.4;
    margin-bottom: 50px;
    animation: heroFadeIn 1.2s ease-out 0.3s backwards;
    font-family: 'Noto Sans JP', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hero-tagline-main .tagline-line {
    display: block;
}

.hero-tagline {
    font-size: clamp(14px, 2vw, 20px);
    font-weight: 300;
    letter-spacing: 0.1em;
    line-height: 2;
    margin-bottom: 40px;
    animation: heroFadeIn 1.2s ease-out 0.3s backwards;
}

.hero-tagline .line {
    display: block;
}

/* スクロールインジケーター */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: heroFadeIn 1.2s ease-out 0.6s backwards;
}

.scroll-text {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, white, transparent);
    animation: scrollLineMove 1.5s ease-in-out infinite;
}

@keyframes scrollLineMove {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(20px); opacity: 0.3; }
}

/* ========================================
   セクション共通スタイル（モバイルファースト）
======================================== */
.section {
    position: relative;
    padding: 60px 20px;
}

.section-line {
    width: 100%;
    height: 1px;
    background: var(--border-color);
    margin-bottom: 50px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    margin-bottom: 50px;
}

.section-title {
    font-size: clamp(32px, 6vw, 80px);
    font-family: 'Noto Sans JP', sans-serif;
    font-weight: 900;
    letter-spacing: 0.02em;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.section-title .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}

.section-title .char.space {
    width: 0.3em;
}

.section-title.animate .char {
    opacity: 1;
    transform: translateY(0);
}

.section-subtitle {
    font-size: 12px;
    font-weight: 300;
    letter-spacing: 0.2em;
    color: var(--text-lighter);
    text-transform: uppercase;
}

/* ========================================
   ABOUTセクション（モバイルファースト）
======================================== */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-message {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    text-align: center;
    margin-bottom: 40px;
}

.about-message.animate {
    opacity: 1;
    transform: translateY(0);
}

.message-title {
    font-size: clamp(26px, 5vw, 36px);
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    line-height: 1.4;
}

.message-title .title-line {
    display: block;
}

.message-text {
    font-size: 14px;
    line-height: 2;
    color: var(--text-light);
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.about-links {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.about-link-card {
    display: block;
    padding: 30px 25px;
    background: var(--bg-light);
    border-radius: 8px;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.about-link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-green));
    opacity: 0.1;
    transition: var(--transition);
    z-index: 0;
}

.about-link-card:hover::before {
    width: 100%;
}

.about-link-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.link-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    letter-spacing: 0.05em;
    position: relative;
    z-index: 1;
}

.link-card-desc {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.link-card-arrow {
    font-size: 22px;
    color: var(--accent-color);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.about-link-card:hover .link-card-arrow {
    transform: translateX(5px);
}

/* ========================================
   BUSINESSセクション（モバイルファースト）
======================================== */
.business-section {
    background: var(--bg-light);
}

.business-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
}

.business-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
    background: white;
    border-radius: 8px;
    padding: 30px 25px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    border: 2px solid transparent;
}

.business-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.business-item:nth-child(2) {
    transition-delay: 0.1s;
}

.business-item:nth-child(3) {
    transition-delay: 0.2s;
}

.business-item:nth-child(4) {
    transition-delay: 0.3s;
}

.business-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.business-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-green));
    border-radius: 10px;
    margin-bottom: 20px;
    color: white;
}

.business-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.business-number {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.business-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
    line-height: 1.4;
}

.business-text {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
}

/* ========================================
   PRODUCTSセクション（モバイルファースト）
======================================== */
.products-carousel-wrapper {
    position: relative;
    padding: 30px 0;
}

.products-carousel {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 10px 0;
}

.products-carousel::-webkit-scrollbar {
    display: none;
}

.product-item {
    flex: 0 0 220px;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
    text-decoration: none;
    display: block;
    color: inherit;
    cursor: pointer;
}

.product-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.product-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.product-image {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f8f9fa;
    padding: 20px;
}

.product-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.product-info {
    padding: 20px;
    text-align: center;
}

.product-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.product-desc {
    font-size: 12px;
    color: var(--text-light);
}

/* カルーセルコントロール */
.carousel-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.carousel-btn {
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.carousel-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.carousel-btn .arrow {
    width: 10px;
    height: 10px;
    border-top: 2px solid var(--text-color);
    border-right: 2px solid var(--text-color);
    transition: var(--transition);
}

.prev-btn .arrow {
    transform: rotate(-135deg);
    margin-left: 3px;
}

.next-btn .arrow {
    transform: rotate(45deg);
    margin-right: 3px;
}

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

.carousel-progress {
    width: 100%;
    height: 2px;
    background: var(--border-color);
    margin-top: 25px;
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

/* ========================================
   NEWSセクション（モバイルファースト）
======================================== */
.news-section {
    background: #f8f9fa;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.news-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.news-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.news-item.hidden {
    display: none;
}

.news-item.show {
    display: block;
}

.news-link {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px 0;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    position: relative;
}

.news-line {
    width: 100%;
    height: 1px;
    background: var(--border-color);
    margin-bottom: 8px;
}

.news-link:hover {
    transform: translateX(5px);
}

.news-date {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-lighter);
}

.news-category {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 12px;
    background: var(--accent-color);
    color: white;
    border-radius: 20px;
    text-align: center;
    width: fit-content;
}

.news-title {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-color);
    line-height: 1.6;
}

.news-more {
    text-align: center;
    margin-top: 40px;
}

.more-btn {
    padding: 12px 30px;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    cursor: pointer;
    border-radius: 30px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.more-btn:hover {
    background: var(--primary-color);
    color: white;
}

.more-icon {
    width: 8px;
    height: 8px;
    border-bottom: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: rotate(45deg);
    transition: var(--transition);
}

.more-btn:hover .more-icon {
    transform: rotate(45deg) translateY(3px);
}

/* ========================================
   SUSTAINABILITYセクション（モバイルファースト）
======================================== */
.sustainability-section {
    background: white;
}

.sustainability-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.sustainability-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.sustainability-item.animate {
    opacity: 1;
    transform: translateY(0);
}

.sustainability-item:nth-child(2) {
    transition-delay: 0.2s;
}

.sustainability-item:nth-child(3) {
    transition-delay: 0.4s;
}

.sustainability-image {
    position: relative;
    width: 100%;
    height: 200px;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 20px;
}

.sustainability-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.sustainability-item:hover .sustainability-image img {
    transform: scale(1.1);
}

.sustainability-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.title-en {
    font-size: 11px;
    font-weight: 400;
    color: var(--text-lighter);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.sustainability-text {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-light);
}

/* テキスト内リンク */
.text-link {
    color: var(--accent-color);
    text-decoration: none;
    border-bottom: 1px solid var(--accent-color);
    transition: var(--transition);
}

.text-link:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* ========================================
   COMPANYセクション（モバイルファースト）
======================================== */
.company-section {
    background: var(--bg-light);
}

/* タブラッパー */
.company-tabs-wrapper {
    margin-bottom: 30px;
}

.company-tabs {
    display: flex;
    background: white;
    border-radius: 50px;
    padding: 6px;
    gap: 4px;
    position: relative;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    max-width: 320px;
    margin: 0 auto;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    z-index: 2;
}

.tab-btn .tab-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.tab-btn .tab-icon svg {
    width: 18px;
    height: 18px;
}

.tab-btn.active {
    color: white;
    background: var(--primary-color);
}

.tab-btn:hover:not(.active) {
    color: var(--primary-color);
}

.tab-indicator {
    display: none;
}

.company-content {
    min-height: 300px;
}

.tab-content {
    display: none;
    animation: tabFadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

@keyframes tabFadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* プロファイルテーブル（会社概要） */
.profile-table {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.04);
}

.profile-row {
    display: flex;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.profile-row:last-child {
    border-bottom: none;
}

.profile-row:hover {
    background: var(--bg-light);
}

.profile-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.profile-value {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-color);
    line-height: 1.8;
}

/* タイムライン（沿革） */
.timeline {
    position: relative;
    padding-left: 0;
}

.timeline-phase {
    margin-bottom: 25px;
    margin-top: 35px;
}

.timeline-phase:first-child {
    margin-top: 0;
}

.phase-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-color);
    padding: 14px 20px;
    background: linear-gradient(135deg, rgba(74, 144, 164, 0.08), rgba(127, 176, 105, 0.08));
    border-left: 3px solid var(--accent-color);
    border-radius: 0 8px 8px 0;
    letter-spacing: 0.02em;
}

.timeline-item {
    position: relative;
    display: flex;
    gap: 20px;
    padding-bottom: 30px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item:last-child .timeline-marker::after {
    display: none;
}

.timeline-marker {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 14px;
    flex-shrink: 0;
}

.timeline-dot {
    width: 14px;
    height: 14px;
    background: white;
    border: 3px solid var(--accent-color);
    border-radius: 50%;
    transition: var(--transition);
    flex-shrink: 0;
    z-index: 2;
}

.timeline-marker::after {
    content: '';
    position: absolute;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: calc(100% + 16px);
    background: linear-gradient(to bottom, var(--accent-color), var(--accent-green));
}

.timeline-item:hover .timeline-dot {
    background: var(--accent-color);
    transform: scale(1.2);
}

.timeline-item.current .timeline-dot {
    background: var(--accent-green);
    border-color: var(--accent-green);
    box-shadow: 0 0 0 4px rgba(127, 176, 105, 0.3);
    animation: currentPulse 2s ease-in-out infinite;
}

@keyframes currentPulse {
    0%, 100% { box-shadow: 0 0 0 4px rgba(127, 176, 105, 0.3); }
    50% { box-shadow: 0 0 0 8px rgba(127, 176, 105, 0.1); }
}

.timeline-content {
    flex: 1;
    padding-top: 0;
}

.timeline-date {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
    line-height: 14px;
}

.timeline-card {
    background: white;
    border-radius: 10px;
    padding: 16px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    transition: var(--transition);
}

.timeline-item:hover .timeline-card {
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transform: translateX(5px);
}

.timeline-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 6px;
}

.timeline-card p {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-light);
    margin: 0;
}

/* ========================================
   CONTACTセクション（モバイルファースト）
======================================== */
.contact-intro {
    text-align: center;
    margin-bottom: 35px;
}

.contact-intro p {
    font-size: 15px;
    color: var(--text-light);
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-info {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.contact-info.animate {
    opacity: 1;
    transform: translateY(0);
}

.contact-item {
    margin-bottom: 25px;
}

.contact-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--text-lighter);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.contact-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--primary-color);
}

.contact-note {
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.8;
}

/* フォーム */
.contact-form-wrapper {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.contact-form-wrapper.animate {
    opacity: 1;
    transform: translateY(0);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-color);
}

.required {
    color: #e74c3c;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    width: 100%;
    padding: 15px 40px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.submit-btn:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.btn-arrow {
    width: 10px;
    height: 10px;
    border-top: 2px solid white;
    border-right: 2px solid white;
    transform: rotate(45deg);
}

/* カテゴリ選択パネル */
.contact-category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin-bottom: 40px;
}

.contact-category-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px 20px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.contact-category-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.contact-category-card.active {
    border-color: var(--primary-color);
    background: var(--bg-light);
}

.category-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-green));
    border-radius: 12px;
    color: white;
}

.category-icon svg {
    stroke: white;
}

.category-content {
    flex: 1;
}

.category-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
    letter-spacing: 0.02em;
}

.category-desc {
    font-size: 13px;
    color: var(--text-light);
    margin: 0;
}

/* 選択カテゴリラベル */
.selected-category-label {
    display: inline-block;
    padding: 8px 20px;
    background: var(--primary-color);
    color: white;
    font-size: 13px;
    font-weight: 600;
    border-radius: 30px;
    margin-bottom: 30px;
}

/* ファイルアップロード */
.form-group input[type="file"] {
    padding: 12px 15px;
    background: var(--bg-light);
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
}

.form-group input[type="file"]:hover {
    border-color: var(--accent-color);
}

.file-hint {
    font-size: 12px;
    color: var(--text-lighter);
    margin-top: 8px;
}

/* ========================================
   フッター（モバイルファースト）
======================================== */
.footer {
    position: relative;
    padding: 60px 20px 30px;
    color: white;
}

.footer-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.footer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 15, 44, 0.9) 0%, rgba(26, 31, 58, 0.9) 100%);
    z-index: 2;
}

.footer-content {
    position: relative;
    z-index: 3;
}

.footer-logo {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: clamp(50px, 10vw, 100px);
    font-weight: 900;
    letter-spacing: 0.02em;
    margin-bottom: 40px;
}

.footer-logo .char {
    display: inline-block;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-title {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: white;
    text-decoration: none;
    font-size: 13px;
    transition: var(--transition);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--accent-color);
    transform: translateX(5px);
}

.footer-contact p {
    margin-bottom: 6px;
    font-size: 13px;
    line-height: 1.6;
}

/* 住所の自動リンク化を無効にする */
.footer-contact a[href^="maps:"],
.footer-contact a[href^="geo:"],
.footer-contact a[href*="maps.google"],
.footer-contact a[href*="maps.apple"] {
    color: inherit;
    text-decoration: none;
    pointer-events: none;
}

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

.copyright {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.05em;
}

/* ========================================
   トップに戻るボタン（モバイルファースト）
======================================== */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(10, 15, 44, 0.3);
}

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

.back-to-top:hover {
    background: var(--accent-color);
    transform: translateY(-5px);
}

.arrow-up {
    width: 10px;
    height: 10px;
    border-top: 2px solid white;
    border-right: 2px solid white;
    transform: rotate(-45deg);
    margin-top: 4px;
}

/* ========================================
   タブレット用スタイル (min-width: 768px)
======================================== */
@media (min-width: 768px) {
    .header {
        padding: 20px 30px;
    }

    .header.scrolled {
        padding: 15px 30px;
    }

    .logo-text {
        font-size: 28px;
    }

    .section {
        padding: 80px 30px;
    }

    .section-line {
        margin-bottom: 60px;
    }

    .section-header {
        margin-bottom: 70px;
    }

    .section-subtitle {
        font-size: 13px;
    }

    .message-title {
        font-size: 28px;
    }

    .about-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .about-link-card {
        padding: 35px 30px;
    }

    .business-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .business-item {
        padding: 35px 30px;
    }

    .business-icon {
        width: 70px;
        height: 70px;
    }

    .business-icon svg {
        width: 50px;
        height: 50px;
    }

    .product-item {
        flex: 0 0 250px;
    }

    .product-image {
        height: 220px;
    }

    .news-link {
        display: grid;
        grid-template-columns: 100px 90px 1fr;
        gap: 20px;
        align-items: center;
        padding: 25px 0;
    }

    .news-line {
        grid-column: 1 / -1;
        margin-bottom: 8px;
    }

    .news-title {
        font-size: 15px;
    }

    .sustainability-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 35px;
    }

    .sustainability-image {
        height: 240px;
    }

    /* COMPANY - タブレット */
    .company-tabs {
        max-width: 360px;
    }

    .tab-btn {
        padding: 14px 20px;
        font-size: 14px;
    }

    .profile-row {
        flex-direction: row;
        align-items: flex-start;
        padding: 24px 30px;
    }

    .profile-label {
        width: 140px;
        min-width: 140px;
        margin-bottom: 0;
        padding-top: 2px;
    }

    .profile-value {
        flex: 1;
        font-size: 15px;
    }

    .timeline-item {
        gap: 24px;
    }

    .timeline-marker {
        width: 16px;
    }

    .timeline-dot {
        width: 16px;
        height: 16px;
    }

    .timeline-marker::after {
        top: 16px;
    }

    .timeline-date {
        line-height: 16px;
    }

    .timeline-card {
        padding: 20px;
    }

    .timeline-title {
        font-size: 16px;
    }

    .timeline-card p {
        font-size: 14px;
    }

    .submit-btn {
        width: auto;
    }

    /* カテゴリパネル - タブレット */
    .contact-category-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .contact-category-card {
        padding: 28px 24px;
    }

    .footer {
        padding: 80px 30px 35px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .back-to-top {
        bottom: 30px;
        right: 30px;
        width: 55px;
        height: 55px;
    }
}

/* ========================================
   デスクトップ用スタイル (min-width: 1024px)
======================================== */
@media (min-width: 1024px) {
    .header {
        padding: 30px 60px;
    }

    .header.scrolled {
        padding: 20px 60px;
    }

    .logo-text {
        font-size: 32px;
    }

    /* ナビゲーション - デスクトップではインライン表示 */
    .main-nav {
        position: static;
        width: auto;
        height: auto;
        background: transparent;
        padding: 0;
        overflow: visible;
    }

    .main-nav ul {
        flex-direction: row;
        gap: 40px;
    }

    .main-nav li {
        border-bottom: none;
    }

    .main-nav a {
        display: inline-block;
        padding: 0;
        font-size: 14px;
        color: white;
        position: relative;
    }

    .header.scrolled .main-nav a {
        color: var(--text-color);
    }

    .main-nav a::after {
        content: '';
        position: absolute;
        bottom: -5px;
        left: 0;
        width: 0;
        height: 1px;
        background: var(--accent-color);
        transition: width 0.3s ease;
    }

    .main-nav a:hover {
        transform: none;
    }

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

    /* サブメニュー（デスクトップ） */
    .main-nav .has-submenu {
        position: relative;
    }

    .main-nav .submenu {
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%);
        background: white;
        padding: 15px 0;
        min-width: 140px;
        border-radius: 8px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        margin-top: 15px;
    }

    .main-nav .submenu::before {
        content: '';
        position: absolute;
        top: -8px;
        left: 50%;
        transform: translateX(-50%);
        border-left: 8px solid transparent;
        border-right: 8px solid transparent;
        border-bottom: 8px solid white;
    }

    .main-nav .has-submenu:hover .submenu {
        opacity: 1;
        visibility: visible;
        margin-top: 10px;
    }

    .main-nav .submenu li {
        padding: 0;
    }

    .main-nav .submenu a {
        display: block;
        padding: 10px 25px;
        font-size: 13px;
        color: var(--text-color);
        text-align: center;
    }

    .main-nav .submenu a:hover {
        color: var(--accent-color);
        background: var(--bg-light);
    }

    .main-nav .submenu a::after {
        display: none;
    }

    /* メニュートグルを非表示 */
    .menu-toggle {
        display: none;
    }

    .section {
        padding: 120px 60px;
    }

    .section-line {
        margin-bottom: 80px;
    }

    .section-header {
        margin-bottom: 100px;
    }

    .section-subtitle {
        font-size: 14px;
    }

    .hero-tagline-main {
        margin-bottom: 80px;
    }

    .scroll-line {
        height: 60px;
    }

    .message-title {
        font-size: 32px;
        margin-bottom: 30px;
    }

    .message-text {
        font-size: 16px;
    }

    .about-message {
        margin-bottom: 60px;
    }

    .about-links {
        gap: 30px;
    }

    .about-link-card {
        padding: 40px 30px;
    }

    .link-card-title {
        font-size: 20px;
    }

    .link-card-desc {
        font-size: 14px;
    }

    .business-grid {
        gap: 40px;
    }

    .business-item {
        padding: 40px;
    }

    .business-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 30px;
    }

    .business-icon svg {
        width: 60px;
        height: 60px;
    }

    .business-number {
        font-size: 14px;
        margin-bottom: 15px;
    }

    .business-title {
        font-size: 20px;
        margin-bottom: 15px;
    }

    .products-carousel-wrapper {
        padding: 40px 0;
    }

    .products-carousel {
        gap: 30px;
    }

    .product-item {
        flex: 0 0 280px;
    }

    .product-image {
        height: 240px;
        padding: 30px;
    }

    .product-info {
        padding: 25px;
    }

    .product-name {
        font-size: 18px;
    }

    .product-desc {
        font-size: 13px;
    }

    .carousel-controls {
        gap: 20px;
        margin-top: 40px;
    }

    .carousel-btn {
        width: 50px;
        height: 50px;
    }

    .carousel-btn .arrow {
        width: 12px;
        height: 12px;
    }

    .news-link {
        grid-template-columns: 120px 100px 1fr;
        gap: 30px;
        padding: 30px 0;
    }

    .news-link:hover {
        transform: translateX(10px);
    }

    .news-date {
        font-size: 14px;
    }

    .news-category {
        font-size: 12px;
        padding: 5px 15px;
    }

    .news-title {
        font-size: 16px;
    }

    .news-more {
        margin-top: 60px;
    }

    .more-btn {
        padding: 15px 40px;
        font-size: 14px;
    }

    .sustainability-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 40px;
    }

    .sustainability-image {
        height: 280px;
        margin-bottom: 30px;
    }

    .sustainability-title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .title-en {
        font-size: 12px;
    }

    /* COMPANY - デスクトップ */
    .company-tabs-wrapper {
        margin-bottom: 40px;
    }

    .company-tabs {
        max-width: 400px;
    }

    .tab-btn {
        padding: 16px 24px;
        font-size: 15px;
    }

    .company-content {
        min-height: 400px;
    }

    .profile-row {
        padding: 28px 40px;
    }

    .profile-label {
        width: 160px;
        min-width: 160px;
        font-size: 13px;
    }

    .profile-value {
        font-size: 16px;
    }

    .timeline-item {
        gap: 28px;
        padding-bottom: 35px;
    }

    .timeline-marker {
        width: 18px;
    }

    .timeline-dot {
        width: 18px;
        height: 18px;
    }

    .timeline-marker::after {
        top: 18px;
    }

    .timeline-date {
        font-size: 13px;
        margin-bottom: 10px;
        line-height: 18px;
    }

    .timeline-card {
        padding: 24px;
    }

    .timeline-title {
        font-size: 17px;
        margin-bottom: 8px;
    }

    .timeline-card p {
        font-size: 15px;
    }

    .contact-intro {
        margin-bottom: 50px;
    }

    .contact-intro p {
        font-size: 16px;
    }

    .form-group {
        margin-bottom: 30px;
    }

    .form-group input,
    .form-group textarea {
        padding: 15px 20px;
        font-size: 15px;
    }

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

    .submit-btn {
        padding: 18px 50px;
        gap: 15px;
    }

    .btn-arrow {
        width: 12px;
        height: 12px;
    }

    /* カテゴリパネル - デスクトップ */
    .contact-category-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 25px;
        margin-bottom: 50px;
    }

    .contact-category-card {
        flex-direction: column;
        text-align: center;
        padding: 35px 20px;
    }

    .category-icon {
        width: 64px;
        height: 64px;
        margin-bottom: 5px;
    }

    .category-title {
        font-size: 15px;
    }

    .category-desc {
        font-size: 12px;
    }

    .footer {
        padding: 100px 60px 40px;
    }

    .footer-logo {
        margin-bottom: 60px;
    }

    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 60px;
        margin-bottom: 60px;
        padding-bottom: 60px;
    }

    .footer-title {
        font-size: 14px;
        margin-bottom: 20px;
    }

    .footer-links li {
        margin-bottom: 12px;
    }

    .footer-links a {
        font-size: 14px;
    }

    .footer-contact p {
        font-size: 14px;
        margin-bottom: 8px;
    }

    .copyright {
        font-size: 12px;
    }

    .back-to-top {
        bottom: 40px;
        right: 40px;
        width: 60px;
        height: 60px;
    }

    .arrow-up {
        width: 12px;
        height: 12px;
        margin-top: 5px;
    }
}

/* ========================================
   COLUMNページ専用スタイル（モバイルファースト）
======================================== */
.column-section {
    padding: 100px 20px 60px;
    min-height: 100vh;
    background: #f8f9fa;
}

.column-container {
    max-width: 1000px;
    margin: 0 auto;
}

/* ページタイトル */
.column-page-header {
    text-align: center;
    margin-bottom: 50px;
}

.column-page-title {
    font-family: 'Noto Sans JP', sans-serif;
    font-size: clamp(36px, 8vw, 72px);
    font-weight: 900;
    color: var(--primary-color);
    letter-spacing: 0.02em;
    line-height: 1.2;
}

.column-page-title .title-accent {
    display: block;
    color: var(--accent-color);
}

/* 記事一覧 */
.column-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 60px;
}

/* 記事カード */
.column-article {
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.column-article:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

/* 記事サムネイル */
.column-article-image {
    width: 100%;
    height: 200px;
    flex-shrink: 0;
}

.column-article-image .image-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1e3a5f 0%, #2c5282 100%);
}

.column-article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 記事コンテンツ */
.column-article-content {
    display: flex;
    flex-direction: column;
    padding: 25px;
    flex: 1;
}

.column-article-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
    line-height: 1.5;
    word-break: keep-all;
    overflow-wrap: break-word;
}

.column-article-desc {
    font-size: 14px;
    line-height: 1.9;
    color: var(--text-light);
    margin-bottom: 20px;
    flex: 1;
}

.column-article-link {
    display: inline-flex;
    align-items: center;
    align-self: flex-end;
    gap: 8px;
    padding: 10px 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
    background: transparent;
    border: 1px solid var(--primary-color);
    border-radius: 25px;
    transition: var(--transition);
}

.column-article-link::after {
    content: '→';
    font-size: 14px;
    transition: var(--transition);
}

.column-article-link:hover {
    background: var(--primary-color);
    color: white;
}

.column-article-link:hover::after {
    transform: translateX(3px);
}

/* ページネーション */
.column-pagination {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
}

.pagination-item,
.pagination-next,
.pagination-prev {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    color: var(--text-color);
    background: white;
    border: 1px solid var(--border-color);
}

.pagination-item:hover,
.pagination-next:hover,
.pagination-prev:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.pagination-item.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.pagination-next,
.pagination-prev {
    font-size: 16px;
}

/* タブレット以上 */
@media (min-width: 768px) {
    .column-section {
        padding: 140px 30px 80px;
    }

    .column-page-header {
        margin-bottom: 60px;
    }

    .column-list {
        gap: 50px;
        margin-bottom: 70px;
    }

    /* 記事カード - 2カラムレイアウト */
    .column-article {
        flex-direction: row;
    }

    .column-article-image {
        width: 320px;
        min-width: 320px;
        height: auto;
        min-height: 220px;
    }

    .column-article-content {
        padding: 30px 35px;
    }

    .column-article-title {
        font-size: 20px;
        margin-bottom: 18px;
    }

    .column-article-desc {
        font-size: 15px;
        line-height: 2;
    }

    .pagination-item,
    .pagination-next,
    .pagination-prev {
        width: 44px;
        height: 44px;
        font-size: 15px;
    }
}

/* デスクトップ */
@media (min-width: 1024px) {
    .column-section {
        padding: 180px 60px 120px;
    }

    .column-page-header {
        margin-bottom: 80px;
    }

    .column-list {
        gap: 60px;
        margin-bottom: 80px;
    }

    .column-article-image {
        width: 380px;
        min-width: 380px;
        min-height: 260px;
    }

    .column-article-content {
        padding: 40px 45px;
    }

    .column-article-title {
        font-size: 22px;
        margin-bottom: 20px;
    }

    .column-article-desc {
        font-size: 15px;
        margin-bottom: 25px;
    }

    .column-article-link {
        font-size: 15px;
    }

    .pagination-item,
    .pagination-next,
    .pagination-prev {
        width: 48px;
        height: 48px;
        font-size: 16px;
        border-radius: 10px;
    }

    .pagination-next,
    .pagination-prev {
        font-size: 18px;
    }
}

/* PC/SP タイトル切替用クラス */
.title--pc {
    display: none;
}
.title--sp {
    display: block;
}

@media (min-width: 768px) {
    .title--pc {
        display: block;
    }
    .title--sp {
        display: none;
    }
}