/* =============================================
   GRUST Corporate Website - Main Styles
   Premium Enterprise Design System
   ============================================= */

/* Variables */
:root {
    --primary-color: #1a365d;
    --secondary-color: #2563eb;
    --accent-color: #3b82f6;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    --border-color: #e2e8f0;
    
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Noto Sans JP', sans-serif;
    
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    --header-height: 80px;
    --container-width: 1280px;
    --container-padding: 40px;
}

/* =============================================
   Loading Screen
   ============================================= */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loading-screen.loaded {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
}

.loading-logo {
    margin-bottom: 20px;
}

.loading-logo-img {
    width: 120px;
    height: 120px;
    animation: fadeInScale 1.5s ease-out;
}

@keyframes fadeInScale {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.loading-logo svg {
    animation: rotate 2s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.loading-text {
    font-family: var(--font-primary);
    font-size: 24px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 4px;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.5s;
}

/* =============================================
   Header Navigation
   ============================================= */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition-base);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

.main-header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-wrapper {
    display: flex;
    align-items: center;
}

.logo-link {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.header-logo {
    height: 40px;
    width: auto;
    transition: opacity 0.3s ease;
}

.header-logo:hover {
    opacity: 0.8;
}

.logo-text {
    font-family: var(--font-primary);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: 1px;
}

.logo-subtitle {
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 40px;
    list-style: none;
}

.nav-link {
    font-family: var(--font-primary);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    position: relative;
    transition: var(--transition-base);
    padding: 8px 0;
}

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

.nav-link:hover {
    color: var(--accent-color);
}

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

.contact-btn {
    background: var(--primary-color);
    color: white !important;
    padding: 10px 24px !important;
    border-radius: 6px;
    transition: var(--transition-base);
}

.contact-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.contact-btn::after {
    display: none;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-base);
}

/* =============================================
   Hero Section with Slider
   ============================================= */
.hero-section {
    position: relative;
    height: 100vh;
    width: 100%;
    overflow: hidden;
    background: var(--bg-dark);
}

.hero-slider {
    position: relative;
    width: 100%;
    height: 100%;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease, transform 1.5s ease;
    cursor: pointer;
}

.hero-slide.active {
    opacity: 1;
}

.slide-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1.1);
    transition: transform 8s ease;
}

.hero-slide.active .slide-image {
    transform: scale(1);
}

.slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, 
        rgba(15, 23, 42, 0.3) 0%, 
        rgba(15, 23, 42, 0.5) 50%,
        rgba(15, 23, 42, 0.7) 100%);
}

.slide-content {
    position: absolute;
    bottom: 180px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: white;
    z-index: 2;
    opacity: 0;
    animation: slideContentIn 1s ease forwards;
    animation-delay: 0.5s;
}

@keyframes slideContentIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.slide-title {
    font-family: var(--font-primary);
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.slide-subtitle {
    font-family: var(--font-secondary);
    font-size: clamp(16px, 2vw, 20px);
    font-weight: 300;
    opacity: 0.9;
    letter-spacing: 2px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    left: 40px;
    bottom: 40px;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 12px;
}

.scroll-text {
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 500;
    color: white;
    letter-spacing: 2px;
    text-transform: uppercase;
    writing-mode: vertical-rl;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -60px;
    left: 0;
    width: 100%;
    height: 60px;
    background: linear-gradient(to bottom, transparent, white);
    animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
    to {
        top: 60px;
    }
}

/* Slide Navigation Dots */
.slide-nav {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 3;
}

.slide-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--transition-base);
}

.slide-dot:hover {
    background: rgba(255, 255, 255, 0.5);
}

.slide-dot.active {
    background: white;
    width: 32px;
    border-radius: 6px;
}

/* =============================================
   Mission, Vision, Value Section
   ============================================= */
.mvv-section {
    padding: 120px 0;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    position: relative;
    overflow: hidden;
}

.mvv-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Mission Block - Main Focus */
.mission-block {
    text-align: center;
    margin-bottom: 100px;
    position: relative;
}

.section-label {
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    color: var(--accent-color);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 24px;
    display: inline-block;
    position: relative;
}

.section-label::before,
.section-label::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40px;
    height: 1px;
    background: var(--accent-color);
}

.section-label::before {
    left: -50px;
}

.section-label::after {
    right: -50px;
}

.mission-title {
    font-family: var(--font-secondary);
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 900;
    line-height: 1.4;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.title-main {
    display: inline-block;
}

.title-highlight {
    display: inline-block;
    color: var(--accent-color);
    position: relative;
    padding: 0 8px;
}

.title-highlight::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    width: 100%;
    height: 12px;
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.2) 0%, rgba(59, 130, 246, 0.1) 100%);
    z-index: -1;
}

.mission-description {
    font-family: var(--font-secondary);
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 720px;
    margin: 0 auto;
}

/* Vision & Value Grid */
.vv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.vision-block,
.value-block {
    background: white;
    padding: 48px;
    border-radius: 16px;
    position: relative;
    transition: var(--transition-smooth);
    border: 1px solid var(--border-color);
}

.vision-block:hover,
.value-block:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.vv-label {
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-light);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.vv-title {
    font-family: var(--font-secondary);
    font-size: 24px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.vv-description {
    font-family: var(--font-secondary);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* =============================================
   Service Section
   ============================================= */
.service-section {
    padding: 100px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-title {
    font-family: var(--font-secondary);
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.service-card {
    background: var(--bg-secondary);
    padding: 48px 40px;
    border-radius: 12px;
    position: relative;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.service-card:hover {
    background: white;
    border-color: var(--border-color);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.service-number {
    font-family: var(--font-primary);
    font-size: 48px;
    font-weight: 700;
    color: var(--accent-color);
    opacity: 0.2;
    margin-bottom: 16px;
}

.service-title {
    font-family: var(--font-primary);
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.service-description {
    font-family: var(--font-secondary);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.service-link {
    font-family: var(--font-secondary);
    font-size: 15px;
    font-weight: 500;
    color: var(--accent-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: var(--transition-base);
}

.service-link:hover {
    gap: 8px;
}

/* =============================================
   About Section
   ============================================= */
.about-section {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    padding-right: 20px;
}

.about-description {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 32px 0 48px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-primary);
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-family: var(--font-secondary);
    font-size: 14px;
    color: var(--text-secondary);
}

.about-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    height: 500px;
}

.about-image img,
.about-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-image:hover img,
.about-image:hover .about-video {
    transform: scale(1.05);
}

/* 動画の基本スタイル */
.about-video,
.bpo-video {
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* 動画の読み込み中表示 */
.about-video::-webkit-media-controls,
.bpo-video::-webkit-media-controls {
    display: none;
}

.about-video::-webkit-media-controls-enclosure,
.bpo-video::-webkit-media-controls-enclosure {
    display: none;
}

/* =============================================
   News Section
   ============================================= */
.news-section {
    padding: 100px 0;
    background: white;
}

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

.news-item {
    padding: 32px 0;
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 120px 100px 1fr;
    gap: 24px;
    align-items: center;
    transition: var(--transition-base);
}

.news-item:hover {
    background: var(--bg-secondary);
    margin: 0 -24px;
    padding: 32px 24px;
}

.news-date {
    font-family: var(--font-primary);
    font-size: 14px;
    color: var(--text-secondary);
}

.news-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--accent-color);
    color: white;
    font-size: 12px;
    border-radius: 4px;
    font-family: var(--font-secondary);
}

.news-title a {
    font-family: var(--font-secondary);
    font-size: 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

.news-title a:hover {
    color: var(--accent-color);
}

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

.btn-more {
    display: inline-block;
    padding: 16px 48px;
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    font-family: var(--font-secondary);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-base);
}

.btn-more:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* =============================================
   Contact Section
   ============================================= */
.contact-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 80px;
    align-items: center;
}

.contact-section .section-label {
    color: var(--accent-color);
}

.contact-section .section-title {
    color: white;
    margin-bottom: 24px;
}

.contact-description {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.8;
    opacity: 0.9;
    margin-bottom: 48px;
}

.contact-details {
    display: grid;
    gap: 24px;
}

.contact-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 16px;
    align-items: center;
}

.contact-label {
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    opacity: 0.7;
}

.contact-value {
    font-family: var(--font-secondary);
    font-size: 16px;
    color: white;
    text-decoration: none;
    transition: var(--transition-base);
}

a.contact-value:hover {
    color: var(--accent-color);
}

.btn-contact {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    padding: 20px 40px;
    background: white;
    color: var(--primary-color);
    border-radius: 8px;
    font-family: var(--font-secondary);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-contact:hover {
    transform: translateX(8px);
    box-shadow: 0 12px 32px rgba(255, 255, 255, 0.2);
}

/* =============================================
   BPO Solution Section
   ============================================= */
.bpo-section {
    padding: 100px 0;
    background: white;
    position: relative;
}

.bpo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.bpo-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    height: 500px;
}

.bpo-image img,
.bpo-image .bpo-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.bpo-image:hover img,
.bpo-image:hover .bpo-video {
    transform: scale(1.05);
}

.bpo-image-overlay {
    position: absolute;
    top: 32px;
    right: 32px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.bpo-feature {
    text-align: center;
}

.feature-number {
    display: block;
    font-family: var(--font-primary);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.feature-label {
    display: block;
    font-family: var(--font-secondary);
    font-size: 12px;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.bpo-text {
    padding-left: 20px;
}

.bpo-description {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 32px 0 48px;
}

.bpo-features {
    display: grid;
    gap: 32px;
}

.bpo-feature-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    padding: 12px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 8px;
}

.feature-title {
    font-family: var(--font-secondary);
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.feature-desc {
    font-family: var(--font-secondary);
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =============================================
   Partners Section
   ============================================= */
.partners-section {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    overflow: hidden;
}

.partners-section .section-header {
    margin-bottom: 60px;
}

.section-subtitle {
    font-family: var(--font-secondary);
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-top: 16px;
}

.partners-slider-wrapper {
    position: relative;
    width: 100%;
    overflow: hidden;
    padding: 40px 0;
}

.partners-slider-wrapper::before,
.partners-slider-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    width: 200px;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.partners-slider-wrapper::before {
    left: 0;
    background: linear-gradient(90deg, #ffffff 0%, transparent 100%);
}

.partners-slider-wrapper::after {
    right: 0;
    background: linear-gradient(90deg, transparent 0%, #ffffff 100%);
}

.partners-slider {
    position: relative;
    width: 100%;
    height: 120px;
    display: flex;
    align-items: center;
}

.partners-track {
    display: flex;
    animation: scroll-partners 40s linear infinite;
    will-change: transform;
}

@keyframes scroll-partners {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.partner-logo {
    flex: 0 0 auto;
    width: 200px;
    height: 80px;
    margin: 0 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 12px;
    padding: 20px;
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.partner-logo img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: grayscale(0%);
    opacity: 1;
    transition: none;
}

/* =============================================
   Footer
   ============================================= */
.main-footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 80px;
    margin-bottom: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo-img {
    height: 50px;
    width: auto;
    margin-bottom: 12px;
}

.footer-logo {
    font-family: var(--font-primary);
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-tagline {
    font-family: var(--font-secondary);
    font-size: 14px;
    opacity: 0.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 200px);
    gap: 40px;
}

.footer-title {
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 16px;
    opacity: 0.9;
}

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

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

.footer-list a {
    font-family: var(--font-secondary);
    font-size: 14px;
    color: white;
    text-decoration: none;
    opacity: 0.7;
    transition: var(--transition-base);
}

.footer-list a:hover {
    opacity: 1;
    color: var(--accent-color);
}

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

.copyright {
    font-family: var(--font-primary);
    font-size: 13px;
    opacity: 0.5;
}

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

.fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 1024px) {
    :root {
        --container-padding: 24px;
    }
    
    .vv-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .bpo-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-text,
    .bpo-text {
        padding-right: 0;
        padding-left: 0;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .partners-track {
        animation-duration: 30s;
    }
}

@media (max-width: 768px) {
    /* 動画のモバイル最適化 */
    .about-video,
    .bpo-video {
        height: 250px;
        object-fit: cover;
    }
    
    .about-image,
    .bpo-image {
        height: 250px;
    }
    
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 40px 0;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
    }
    
    .main-nav.active {
        transform: translateX(0);
    }
    
    .nav-list {
        flex-direction: column;
        gap: 30px;
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        font-size: 18px;
        font-weight: 600;
        padding: 15px 0;
        width: 100%;
        display: block;
    }
    
    .menu-toggle {
        display: flex;
        position: relative;
        z-index: 1001;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    body.menu-open {
        overflow: hidden;
    }
    
    .slide-content {
        bottom: 120px;
    }
    
    .scroll-indicator {
        left: 20px;
        bottom: 20px;
    }
    
    .slide-nav {
        bottom: 20px;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .news-item {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    :root {
        --header-height: 60px;
        --container-padding: 16px;
    }
    
    .header-logo {
        height: 32px;
    }
    
    .logo-text {
        font-size: 24px;
    }
    
    .mission-title {
        font-size: 28px;
    }
    
    .vision-block,
    .value-block {
        padding: 32px 24px;
    }
}