/* ================================
   青山貿易株式会社 企業サイト
   Aoyama Trading Co., Ltd. Corporate Website
   ================================ */

/* === CSS変数定義 / CSS Variables === */
:root {
    /* メインカラー / Main Colors */
    --primary-blue: #00539B;
    --light-blue: #E8F4FF;
    --dark-blue: #003366;
    --accent-blue: #0066CC;
    
    /* グレースケール / Grayscale */
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --gray: #CCCCCC;
    --dark-gray: #666666;
    --black: #1A1A1A;
    
    /* フォント / Fonts */
    --font-main: 'Noto Sans JP', 'Helvetica Neue', Arial, sans-serif;
    --font-en: 'Roboto', 'Arial', sans-serif;
    
    /* スペーシング / Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* トランジション / Transition */
    --transition: all 0.3s ease;
}

/* === リセットCSS / CSS Reset === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-main);
    line-height: 1.7;
    color: var(--black);
    background-color: var(--white);
    overflow-x: hidden;
}

/* 中文字体优化 / Chinese Font Optimization */
body[data-lang="zh"],
html[lang="zh"] body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
}

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

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

ul, ol {
    list-style: none;
}

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

/* === ユーティリティクラス / Utility Classes === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-blue);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-blue));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(0, 83, 155, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 83, 155, 0.4);
}

.btn-outline {
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    background: transparent;
}

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

/* === ヘッダー / Header === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.header-container {
    display: flex;
    justify-content: flex-start; /* 改为左对齐，不使用space-between */
    align-items: center;
    padding: 1rem 2rem 1rem 0.5rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    gap: 2rem; /* Logo和导航栏之间的间距 */
    position: relative; /* 为绝对定位的子元素提供参照 */
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: 0;
    min-width: 350px;
    flex-shrink: 0;
}

.logo img {
    height: 80px;
    width: auto;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.2;
}

.logo-text a {
    text-decoration: none;
    color: inherit;
}

.logo-text .company-name-nowrap {
    font-size: 1.8rem;
    white-space: nowrap;
    display: block;
    font-weight: 700;
    color: #00539B !important;
    font-family: 'Noto Sans JP', 'Microsoft YaHei', sans-serif;
    line-height: 1.2;
}

/* Service pages company name */
.nav-logo .company-name-nowrap {
    font-size: 1.8rem;
    white-space: nowrap;
    display: block;
    font-weight: 700;
    color: #00539B !important;
    margin-left: 1rem;
    font-family: 'Noto Sans JP', 'Microsoft YaHei', sans-serif;
    line-height: 1.2;
}

.logo-text .en {
    font-size: 0.85rem;
    font-weight: 400;
    color: #666;
    display: block;
    letter-spacing: 0.5px;
    font-family: 'Roboto', 'Noto Sans JP', sans-serif;
    line-height: 1.3;
}

/* === Navbar Container / ナビゲーションバー === */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-img {
    height: 55px;
    width: auto;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle i {
    font-size: 1.5rem;
    color: var(--primary-blue);
}

/* === ナビゲーション / Navigation === */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    list-style: none;
    margin: 0 1.5rem; /* 左右各1.5rem的间距 */
    padding: 0;
    flex-shrink: 0; /* 不收缩 */
    flex-grow: 0; /* 不扩展 */
}

/* 言語別のナビゲーション位置調整 - 统一所有语言的间距 */
body[data-lang="ja"] .nav-list {
    gap: 0.65rem !important;
}

body[data-lang="ja"] .nav-list > .nav-item > a {
    padding: 0.5rem 0.65rem !important;
}

body[data-lang="zh"] .nav-list {
    gap: 0.65rem !important;
}

body[data-lang="zh"] .nav-list > .nav-item > a {
    padding: 0.5rem 0.65rem !important;
}

body[data-lang="en"] .nav-list {
    gap: 0.65rem !important;
}

body[data-lang="en"] .nav-list > .nav-item > a {
    padding: 0.5rem 0.65rem !important;
}

.nav-list {
    display: flex;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu > li,
.nav-list > .nav-item {
    position: relative;
    list-style: none;
}

.nav-menu > li > a,
.nav-list > .nav-item > a {
    font-size: 0.88rem;
    font-weight: 500;
    color: #00539B !important;
    padding: 0.5rem 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
    display: block;
}

.nav-menu > li > a::after,
.nav-list > .nav-item > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

.nav-menu > li > a:hover::after,
.nav-menu > li > a.active::after,
.nav-list > .nav-item > a:hover::after,
.nav-list > .nav-item > a.active::after {
    width: 80%;
}

.nav-menu > li > a:hover,
.nav-list > .nav-item > a:hover {
    color: var(--dark-blue);
    background: rgba(0, 83, 155, 0.05);
}

/* 外部リンクアイコン / External Link Icon */
.nav-menu > li > a[target="_blank"]::before,
.nav-list > .nav-item > a[target="_blank"]::before {
    content: '🛒';
    margin-right: 0.3rem;
    font-size: 0.9rem;
}

/* === ドロップダウンメニュー / Dropdown Menu === */
.nav-dropdown,
.nav-item.nav-dropdown {
    position: relative;
}

.nav-dropdown .dropdown-menu,
.nav-item .dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--white);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 0.5rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: 0.5rem;
    list-style: none;
}

.nav-dropdown:hover .dropdown-menu,
.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    list-style: none;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--black);
    font-size: 0.9rem;
    transition: var(--transition);
    border-radius: 0;
}

.dropdown-menu a::after {
    display: none !important;
}

.dropdown-menu a::before {
    content: '' !important;
}

.dropdown-menu a:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
    padding-left: 2rem;
}

/* === サブナビゲーションバー / Sub Navigation Bar === */
.sub-nav {
    background: var(--light-blue);
    border-bottom: 2px solid var(--primary-blue);
    padding: 1rem 0;
    margin-top: 80px;
}

.sub-nav-list {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.sub-nav-list a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--dark-gray);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.sub-nav-list a.active {
    background: var(--primary-blue);
    color: var(--white);
}

.sub-nav-list a:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

/* === 言語切替 / Language Switcher === */
.language-switcher {
    margin-left: 3rem; /* 与导航栏保持固定的3rem距离 */
    flex-shrink: 0; /* 不收缩 */
    z-index: 1000;
}

/* 下拉式语言切换器样式 */
.language-switcher.dropdown-style {
    width: auto;
    padding: 0;
    background: transparent;
}

/* 当前语言按钮 */
.lang-current {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--light-blue);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    color: var(--primary-blue);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    white-space: nowrap;
}

.lang-current:hover {
    background: var(--primary-blue);
    color: var(--white);
}

.lang-current i {
    font-size: 0.7rem;
    transition: transform 0.3s ease;
}

.lang-current.active i {
    transform: rotate(180deg);
}

/* 下拉菜单容器 */
.lang-dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 2000;
    min-width: 140px;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 下拉菜单选项 */
.lang-dropdown .lang-option {
    display: block;
    width: 100%;
    padding: 0.8rem 1.2rem;
    text-align: left;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--dark-gray);
    transition: var(--transition);
    border-bottom: 1px solid var(--gray);
}

.lang-dropdown .lang-option:last-child {
    border-bottom: none;
}

.lang-dropdown .lang-option:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
}

.lang-dropdown .lang-option.active {
    background: var(--primary-blue);
    color: var(--white);
    font-weight: 600;
}

/* 旧版按钮式语言切换器（保留兼容） */
.language-switcher:not(.dropdown-style) {
    display: flex;
    flex-direction: row;
    gap: 0.5rem;
    background: var(--light-blue);
    padding: 0.4rem 0.6rem;
    border-radius: 25px;
}

.language-switcher button {
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark-gray);
    border-radius: 20px;
    transition: var(--transition);
}

.language-switcher button.active {
    background: var(--primary-blue);
    color: var(--white);
}

.language-switcher button:hover {
    background: var(--accent-blue);
    color: var(--white);
}

/* 确保所有语言下都是水平布局 */
body[data-lang="ja"] .language-switcher,
body[data-lang="zh"] .language-switcher,
body[data-lang="en"] .language-switcher {
    flex-direction: row !important;
    display: flex !important;
}

/* === モバイルメニュー / Mobile Menu === */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
    background: none;
    border: none;
    align-items: center;
    justify-content: center;
}

/* 支持两种结构: span标签 和 Font Awesome图标 */
.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-toggle i {
    font-size: 1.5rem;
    color: var(--primary-blue);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

/* active状态时将fa-bars图标变为fa-times */
.mobile-menu-toggle.active i.fa-bars:before {
    content: "\f00d"; /* fa-times图标的Unicode */
}

/* === ヒーローセクション / Hero Section === */
.hero {
    position: relative;
    height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: 
        linear-gradient(135deg, rgba(0, 64, 128, 0.85) 0%, rgba(0, 83, 155, 0.85) 50%, rgba(0, 51, 102, 0.85) 100%),
        url('https://sspark.genspark.ai/cfimages?u1=wiKYaRRrqlKoGQhms%2Bx2EYxTGPcRgOL18yXufpSlZMCM6PeNqIhyr6mdHYg39Yu%2BqXGBeMkAPvmBfdj9cL58tuNj6pSwI2F%2BbJaja98ZM4D8Pr0Vcb5NdtN81DHyekFhcgrCj0xpEbRE420F5bg%2BIdMuBWCE0Ydgzw%3D%3D&u2=WLZ0qAxK1bEKzDb8&width=2560');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    margin-top: 80px;
    overflow: hidden;
}

/* 添加动态网格背景 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

/* 添加光晕效果 */
.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 30s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(50px);
    }
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    font-weight: 300;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1.2s ease-out 0.4s both;
}

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

/* === 会社紹介セクション / About Section === */
.about {
    background: var(--white);
}

.about-content-simple {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text h3 {
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--dark-gray);
    line-height: 1.8;
}

.about-image {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 83, 155, 0.2);
}

.about-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

/* === 事業案内セクション / Business Section === */
.business {
    background: var(--light-blue);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.business-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.business-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 83, 155, 0.2);
}

.business-card-image {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.business-card-image::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
}

.business-card-icon {
    font-size: 4rem;
    color: var(--white);
    position: relative;
    z-index: 2;
}

.business-card-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.business-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.business-card-subtitle {
    font-size: 0.95rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
    font-weight: 500;
}

.business-card-description {
    color: var(--dark-gray);
    line-height: 1.7;
    margin-bottom: 1.5rem;
    flex: 1;
}

.business-card-content .btn {
    margin-top: auto;
    align-self: flex-start;
}

/* === ニュースセクション / News Section === */
.news {
    background: var(--white);
}

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

.news-item {
    display: flex;
    gap: 2rem;
    padding: 1.5rem;
    background: var(--light-gray);
    border-radius: 12px;
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
}

.news-item:hover {
    background: var(--light-blue);
    transform: translateX(5px);
}

.news-date {
    font-size: 0.9rem;
    color: var(--white);
    background: var(--primary-blue);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    min-width: 120px;
    text-align: center;
    font-weight: 600;
}

.news-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-blue);
}

.news-content p {
    color: var(--dark-gray);
}

/* === お問い合わせセクション / Contact Section === */
.contact {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--gray);
    border-radius: 10px;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 83, 155, 0.1);
}

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

.form-submit {
    text-align: center;
    margin-top: 2rem;
}

/* === フッター / Footer === */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--light-blue);
}

.footer-section p,
.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 0 3px;
    padding: 0 0;
    box-sizing: border-box;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.footer-links-section {
    flex: 1.5;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* === スクロールトップボタン / Scroll to Top === */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0, 83, 155, 0.3);
    z-index: 999;
}

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

.scroll-top:hover {
    background: var(--accent-blue);
    transform: translateY(-5px);
}

/* === レスポンシブデザイン / Responsive Design === */

/* タブレット / Tablet (768px - 1024px) */
@media (max-width: 1024px) {
    .nav-list {
        gap: 1rem;
    }
    
    .nav-item a {
        font-size: 0.9rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* モバイル / Mobile (max-width: 768px) */
@media (max-width: 768px) {
    .header-container,
    .nav-container {
        padding: 0.75rem var(--spacing-sm);
    }
    
    .logo img,
    .logo-img {
        height: 40px;
    }
    
    .logo-text .company-name-nowrap,
    .nav-logo .company-name-nowrap,
    .company-name-nowrap {
        font-size: 1.5rem !important;
        color: #00539B !important;
        font-family: 'Noto Sans JP', 'Microsoft YaHei', sans-serif !important;
        font-weight: 700 !important;
        line-height: 1.2 !important;
    }
    
    .logo-text {
        font-size: 0.9rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        transition: left 0.3s ease;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        overflow-y: auto;
        gap: 0;
        max-width: 100%;
        z-index: 1000;
    }
    
    .nav-list {
        position: relative;
        flex-direction: column;
        gap: 0;
        width: 100%;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu > li,
    .nav-list > .nav-item,
    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--gray);
    }
    
    .nav-menu > li > a,
    .nav-list > .nav-item > a,
    .nav-item a {
        display: block;
        padding: 1rem 0;
        font-size: 1.1rem;
    }
    
    .dropdown-menu {
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        box-shadow: none !important;
        background: var(--light-blue) !important;
        margin: 0 !important;
        padding-left: 1rem !important;
    }
    
    /* 移动端语言切换器 - 简洁的正方形图标按钮 */
    .language-switcher {
        position: absolute !important;
        top: 50% !important;
        right: 55px !important; /* 在汉堡菜单左边 */
        transform: translateY(-50%) !important;
        width: auto !important;
        height: auto !important;
        background: transparent !important;
        padding: 0 !important;
        margin: 0 !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        border: none !important;
        z-index: 1001 !important;
    }
    
    .language-switcher.dropdown-style {
        position: absolute !important;
        top: 50% !important;
        right: 55px !important;
        transform: translateY(-50%) !important;
        margin-left: 0 !important;
    }
    
    /* 语言切换按钮 - 正方形图标 */
    .lang-current {
        width: 40px !important;
        height: 40px !important;
        padding: 0 !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        background: var(--primary-blue) !important;
        color: var(--white) !important;
        border: none !important;
        border-radius: 8px !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
        font-size: 1.2rem !important;
        gap: 0 !important;
    }
    
    .lang-current #currentLangText {
        display: none !important;
    }
    
    .lang-current i.fa-chevron-down {
        display: none !important;
    }
    
    /* 在按钮中显示地球图标 */
    .lang-current::before {
        content: '\f0ac' !important;
        font-family: 'Font Awesome 6 Free' !important;
        font-weight: 900 !important;
        font-size: 1.2rem !important;
    }
    
    .lang-current:hover {
        background: var(--dark-blue) !important;
        transform: scale(1.05);
    }
    
    .lang-dropdown {
        position: absolute !important;
        top: calc(100% + 0.5rem) !important;
        right: 0 !important;
        left: auto !important;
        margin-top: 0 !important;
        width: auto !important;
        min-width: 140px !important;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
        border-radius: 8px !important;
        z-index: 1002 !important;
    }
    
    .hero {
        height: 500px;
        margin-top: 70px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .section {
        padding: var(--spacing-md) 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .news-item {
        flex-direction: column;
        gap: 1rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    /* 所有 container 在移动端统一使用 1rem 边距 */
    .container,
    footer .container,
    .footer .container {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }
    
    .scroll-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

/* 小型モバイル / Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        height: 450px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .about-text h3 {
        font-size: 1.5rem;
    }
    
    .business-card-content {
        padding: 1.5rem;
    }
    
    .contact-form {
        padding: 1.5rem 1rem;
    }
}

/* ============================================
   服务页面移动端修复 - 强制覆盖所有样式
   Service Pages Mobile Fix - Force Override
   ============================================ */
@media (max-width: 768px) {
    /* 服务页面专用样式 */
    body .breadcrumb,
    body .breadcrumb-container,
    body .service-content,
    body .service-section {
        width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
    }
    
    /* 面包屑容器 */
    body .breadcrumb-container {
        padding-left: 3px !important;
        padding-right: 3px !important;
    }
    
    /* 服务内容区 */
    body .service-content {
        padding-left: 3px !important;
        padding-right: 3px !important;
    }
    
    /* 服务区块 */
    body .service-section {
        padding: 2rem 3px !important;
        margin: 0 0 2rem 0 !important;
    }
    
    /* Footer 链接 */
    body .footer-links {
        margin: 0 3px !important;
        padding: 0 !important;
        box-sizing: border-box !important;
    }
}

/* === 会社概要 / Company Overview === */
.company-overview {
    padding: 4rem 0;
    background: var(--light-blue);
}

.company-overview h2 {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 2rem;
    color: var(--primary-blue);
}

.overview-table {
    max-width: 900px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

.overview-row {
    display: flex;
    border-bottom: 1px solid var(--light-gray);
}

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

.overview-label {
    flex: 0 0 180px;
    padding: 1.5rem;
    background: var(--primary-blue);
    color: var(--white);
    font-weight: 600;
    display: flex;
    align-items: center;
}

.overview-content {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.overview-content .en-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.overview-content ul {
    list-style: none;
    padding-left: 0;
}

.overview-content ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.overview-content ul li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

@media (max-width: 768px) {
    .overview-row {
        flex-direction: column;
    }
    
    .overview-label {
        flex: 1 1 auto;
        padding: 1rem;
    }
    
    .overview-content {
        padding: 1rem;
    }
}

/* === アニメーション / Animations === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* === プリント用スタイル / Print Styles === */
@media print {
    .header,
    .hero,
    .footer,
    .scroll-top,
    .mobile-menu-toggle {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
    
    .section {
        page-break-inside: avoid;
    }
}/* 移动端修复补丁 - 添加到 css/style.css 的移动端部分 */

@media (max-width: 768px) {
    /* 确保header布局正确 */
    .header-container {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        position: relative !important;
    }
    
    /* Logo在左边 */
    .logo {
        flex-shrink: 0;
        z-index: 1001;
    }
    
    /* 右侧控制区域 */
    .header-container > nav,
    .header-container > .language-switcher,
    .header-container > .mobile-menu-toggle {
        margin-left: auto;
    }
    
    /* 语言切换器在移动端 - 已在前面定义，这里不再重复 */
    
    /* 移动端菜单按钮 */
    .mobile-menu-toggle {
        display: flex !important;
        position: absolute;
        right: 10px;
        top: 50%;
        transform: translateY(-50%);
        z-index: 1001;
        width: 35px;
        height: 35px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        cursor: pointer;
        padding: 5px;
    }
    
    .mobile-menu-toggle span {
        display: block;
        width: 25px;
        height: 3px;
        background-color: var(--primary-blue);
        transition: all 0.3s ease;
        border-radius: 2px;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* 导航菜单在移动端 */
    .nav-menu {
        position: fixed !important;
        top: 70px !important;
        left: -100% !important;
        width: 100% !important;
        height: calc(100vh - 70px) !important;
        background: var(--white) !important;
        flex-direction: column !important;
        padding: 2rem !important;
        transition: left 0.3s ease !important;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1) !important;
        overflow-y: auto !important;
        gap: 0 !important;
        z-index: 1000 !important;
    }
    
    .nav-menu.active {
        left: 0 !important;
    }
    
    /* 导航项在移动端 */
    .nav-list {
        flex-direction: column !important;
        width: 100% !important;
        gap: 0 !important;
    }
    
    .nav-item {
        width: 100% !important;
        border-bottom: 1px solid var(--gray) !important;
    }
    
    .nav-item > a {
        display: block !important;
        padding: 1rem 0 !important;
        font-size: 1.1rem !important;
        color: var(--dark-gray) !important;
    }
    
    /* 下拉菜单在移动端 */
    .dropdown-menu {
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        box-shadow: none !important;
        background: var(--light-blue) !important;
        margin: 0 !important;
        padding-left: 1rem !important;
        border-radius: 0 !important;
    }
    
    .dropdown-menu li a {
        padding: 0.8rem 0 !important;
        font-size: 1rem !important;
    }
}