/* ============================================
   SATULAGI Corporate Website
   Design System: Minimal, Sophisticated, BtoB
   Corporate Colors: #566955, #746C61, #FAF5ED
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Corporate Colors */
    --color-primary: #566955;
    --color-primary-light: #6a7d69;
    --color-primary-dark: #455544;
    --color-primary-glow: rgba(86, 105, 85, 0.5);
    
    --color-secondary: #746C61;
    --color-secondary-light: #8a8276;
    --color-secondary-dark: #5e574d;
    
    --color-warm: #FAF5ED;
    --color-warm-dark: #F0E8DB;
    
    /* Hero Background */
    --color-hero-bg: #E8E4DC;
    
    /* Base Colors */
    --color-black: #1a1a1a;
    --color-dark: #2d2d2d;
    --color-gray-700: #404040;
    --color-gray-600: #525252;
    --color-gray-500: #737373;
    --color-gray-400: #a3a3a3;
    --color-gray-300: #d4d4d4;
    --color-gray-200: #e5e5e5;
    --color-gray-100: #f5f5f5;
    --color-gray-50: #fafafa;
    --color-white: #ffffff;
    
    /* Typography */
    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-jp: 'Noto Sans JP', 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', sans-serif;
    
    /* Font Weights */
    --weight-light: 300;
    --weight-regular: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;
    --space-6xl: 10rem;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 72px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;
    --transition-slower: 0.6s ease;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-jp);
    font-weight: var(--weight-regular);
    line-height: 1.8;
    color: var(--color-dark);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--weight-semibold);
    line-height: 1.4;
}

.font-en {
    font-family: var(--font-en);
}

/* ============================================
   Layout
   ============================================ */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
}

/* ============================================
   Header
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--color-gray-200);
}

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

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

.logo-text {
    font-family: var(--font-en);
    font-size: 1.375rem;
    font-weight: var(--weight-bold);
    letter-spacing: 0.1em;
    color: var(--color-primary);
}

.logo-img {
    height: 48px;
    width: auto;
    display: block;
}

@media (max-width: 768px) {
    .logo-img {
        height: 28px;
    }
}

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

.nav-list {
    display: flex;
    gap: var(--space-2xl);
}

.nav-list a {
    font-family: var(--font-en);
    font-size: 0.875rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.02em;
    color: var(--color-secondary);
    position: relative;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: width var(--transition-base);
}

.nav-list a:hover {
    color: var(--color-primary);
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

/* Language Toggle Button */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-family: var(--font-en);
    font-size: 0.8125rem;
    font-weight: var(--weight-medium);
    color: var(--color-secondary);
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 4px;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.lang-toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.lang-current {
    color: var(--color-primary);
    font-weight: var(--weight-semibold);
}

.lang-divider {
    color: var(--color-gray-400);
}

.lang-option {
    color: var(--color-gray-500);
}

.header-cta {
    font-size: 0.875rem;
    font-weight: var(--weight-medium);
    color: var(--color-primary);
    padding: 0.625rem 1.25rem;
    border: 1px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.header-cta:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.menu-toggle {
    display: none;
    width: 28px;
    height: 20px;
    position: relative;
}

.menu-toggle span {
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--color-primary);
    transition: all var(--transition-fast);
}

.menu-toggle span:first-child {
    top: 0;
}

.menu-toggle span:last-child {
    bottom: 0;
}

.menu-toggle.active span:first-child {
    top: 50%;
    transform: rotate(45deg);
}

.menu-toggle.active span:last-child {
    bottom: 50%;
    transform: rotate(-45deg);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-white);
    z-index: 999;
    padding: var(--space-2xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.mobile-nav.active {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.mobile-nav-list a {
    font-family: var(--font-en);
    font-size: 1.25rem;
    font-weight: var(--weight-medium);
    color: var(--color-dark);
}

.mobile-nav-list .mobile-cta {
    display: inline-block;
    margin-top: var(--space-lg);
    padding: 0.875rem 1.5rem;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    text-align: center;
}

.mobile-lang-toggle {
    font-family: var(--font-en);
    font-size: 1rem;
    font-weight: var(--weight-medium);
    color: var(--color-primary);
    padding: 0.5rem 0;
    background: none;
    border: none;
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav, .header-actions {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .mobile-nav {
        display: block;
    }
}

/* ============================================
   Hero Section - Darker Background
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--header-height) + var(--space-4xl)) 0 var(--space-4xl);
    background-color: var(--color-hero-bg);
    position: relative;
    overflow: hidden;
}

/* Hero Background Animation */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 1;
}

/* Particle Canvas */
.particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.7;
}

/* SVG Connection Lines - Draw Animation */
.hero-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0.6;
}

.connection-line {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    animation: draw-line 4s ease-out forwards;
}

.line-1 { animation-delay: 0.3s; }
.line-2 { animation-delay: 0.8s; }
.line-3 { animation-delay: 1.3s; }

@keyframes draw-line {
    to {
        stroke-dashoffset: 0;
    }
}

/* ============================================
   Globe/Network Visual - Enhanced
   ============================================ */
.hero-globe {
    position: absolute;
    right: 8%;
    top: 50%;
    transform: translateY(-50%);
    width: 450px;
    height: 450px;
    transition: transform 0.3s ease-out;
}

@media (max-width: 1200px) {
    .hero-globe {
        width: 380px;
        height: 380px;
        right: 3%;
    }
}

@media (max-width: 1024px) {
    .hero-globe {
        width: 320px;
        height: 320px;
        right: -30px;
        opacity: 0.5;
    }
}

@media (max-width: 768px) {
    .hero-globe {
        width: 280px;
        height: 280px;
        right: -60px;
        top: 30%;
        opacity: 0.3;
    }
}

/* Pulsing Rings */
.globe-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 1px solid var(--color-primary);
    border-radius: 50%;
    opacity: 0;
}

.ring-1 {
    width: 100%;
    height: 100%;
    animation: pulse-ring 4s ease-in-out infinite;
}

.ring-2 {
    width: 75%;
    height: 75%;
    animation: pulse-ring 4s ease-in-out infinite 0.8s;
}

.ring-3 {
    width: 50%;
    height: 50%;
    animation: pulse-ring 4s ease-in-out infinite 1.6s;
}

.ring-4 {
    width: 25%;
    height: 25%;
    animation: pulse-ring 4s ease-in-out infinite 2.4s;
}

@keyframes pulse-ring {
    0% {
        transform: translate(-50%, -50%) scale(0.95);
        opacity: 0;
    }
    30% {
        opacity: 0.7;
    }
    70% {
        opacity: 0.4;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.15);
        opacity: 0;
    }
}

/* Glowing Core */
.globe-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
}

.globe-core-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: core-pulse 2s ease-in-out infinite;
}

.globe-core-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
    border-radius: 50%;
    animation: core-glow 2s ease-in-out infinite;
}

@keyframes core-pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2);
    }
}

@keyframes core-glow {
    0%, 100% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.5);
    }
}

/* Blinking Dots */
.globe-dots {
    position: absolute;
    width: 100%;
    height: 100%;
}

.globe-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    animation: blink-dot 3s ease-in-out infinite;
}

.globe-dot::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    background: radial-gradient(circle, var(--color-primary-glow) 0%, transparent 70%);
    border-radius: 50%;
    opacity: 0;
    animation: dot-glow 3s ease-in-out infinite;
}

.dot-1 { top: 15%; left: 25%; animation-delay: 0s; }
.dot-1::after { animation-delay: 0s; }
.dot-2 { top: 25%; right: 20%; animation-delay: 0.4s; }
.dot-2::after { animation-delay: 0.4s; }
.dot-3 { top: 45%; left: 15%; animation-delay: 0.8s; }
.dot-3::after { animation-delay: 0.8s; }
.dot-4 { top: 55%; right: 25%; animation-delay: 1.2s; }
.dot-4::after { animation-delay: 1.2s; }
.dot-5 { top: 70%; left: 30%; animation-delay: 1.6s; }
.dot-5::after { animation-delay: 1.6s; }
.dot-6 { top: 80%; right: 35%; animation-delay: 2s; }
.dot-6::after { animation-delay: 2s; }
.dot-7 { top: 35%; left: 45%; animation-delay: 2.4s; }
.dot-7::after { animation-delay: 2.4s; }
.dot-8 { top: 65%; left: 55%; animation-delay: 2.8s; }
.dot-8::after { animation-delay: 2.8s; }

@keyframes blink-dot {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.8);
    }
}

@keyframes dot-glow {
    0%, 100% {
        opacity: 0;
    }
    50% {
        opacity: 0.8;
    }
}

/* Orbit Lines */
.globe-orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px dashed rgba(86, 105, 85, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

.orbit-1 {
    width: 90%;
    height: 90%;
    transform: translate(-50%, -50%) rotateX(60deg);
    animation: orbit-rotate 20s linear infinite;
}

.orbit-2 {
    width: 70%;
    height: 70%;
    transform: translate(-50%, -50%) rotateX(60deg) rotateZ(60deg);
    animation: orbit-rotate 15s linear infinite reverse;
}

.orbit-3 {
    width: 50%;
    height: 50%;
    transform: translate(-50%, -50%) rotateX(60deg) rotateZ(120deg);
    animation: orbit-rotate 25s linear infinite;
}

@keyframes orbit-rotate {
    from {
        transform: translate(-50%, -50%) rotateX(60deg) rotateZ(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotateX(60deg) rotateZ(360deg);
    }
}

/* ============================================
   Hero Content - Left Aligned
   ============================================ */
.hero-container {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-content-left {
    text-align: left;
}

.hero-tagline {
    font-family: var(--font-en);
    font-size: 0.875rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.1em;
    color: var(--color-secondary);
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    animation: fade-up 0.8s ease forwards 0.2s;
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: var(--weight-semibold);
    line-height: 1.3;
    letter-spacing: 0.02em;
    color: var(--color-black);
    margin-bottom: var(--space-2xl);
    min-height: 2.6em;
    word-break: keep-all;
    overflow-wrap: normal;
}

/* 英語モードの場合のフォントサイズ調整 */
html[lang="en"] .hero-title {
    font-size: clamp(1.875rem, 4.5vw, 3.25rem);
}

@media (max-width: 480px) {
    .hero-title {
        min-height: auto;
    }
    
    html[lang="en"] .hero-title {
        font-size: clamp(1.5rem, 7vw, 2rem);
    }
}

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

/* Typewriter effect styles */
.hero-title-line .char {
    opacity: 0;
    display: inline-block;
}

.hero-title-line .char.visible {
    opacity: 1;
}

.hero-lead {
    font-size: clamp(1rem, 2vw, 1.125rem);
    font-weight: var(--weight-regular);
    color: var(--color-secondary);
    line-height: 2;
    margin-bottom: var(--space-3xl);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1s ease, transform 1s ease;
}

.hero-lead.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-cta-btn {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.hero-cta-btn.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Scroll Indicator - Bouncing Dot
   ============================================ */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-3xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    z-index: 2;
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.scroll-indicator.visible {
    opacity: 1;
}

.scroll-indicator.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
    pointer-events: none;
}

.scroll-text {
    font-family: var(--font-en);
    font-size: 0.6875rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-secondary);
}

.scroll-line {
    width: 1px;
    height: 50px;
    background-color: var(--color-gray-400);
    position: relative;
    overflow: hidden;
}

.scroll-dot {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 10px;
    background-color: var(--color-primary);
    border-radius: 2px;
    animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
    0%, 100% {
        top: 0;
        opacity: 1;
    }
    50% {
        top: calc(100% - 10px);
        opacity: 0.4;
    }
}

/* ============================================
   Hero Animations
   ============================================ */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fade-up 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
.delay-4 { animation-delay: 0.8s; }
.delay-5 { animation-delay: 1s; }

@keyframes fade-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    font-size: 0.9375rem;
    font-weight: var(--weight-medium);
    padding: 1rem 2rem;
    transition: all var(--transition-fast);
}

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

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1rem;
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--space-6xl) 0;
}

.section-header {
    margin-bottom: var(--space-4xl);
}

.section-label {
    font-family: var(--font-en);
    font-size: 0.8125rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: var(--weight-semibold);
    color: var(--color-black);
}

/* ============================================
   Hero to Mission Transition
   ============================================ */

/* Hero下部にグラデーション遷移を追加 */
.hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 150px;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        var(--color-hero-bg) 30%,
        var(--color-white) 100%
    );
    pointer-events: none;
    z-index: 1;
}

/* Transition Section */
.section-transition {
    background: var(--color-white);
    padding: var(--space-3xl) 0 var(--space-4xl);
    text-align: center;
    position: relative;
    z-index: 2;
}

.transition-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.transition-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        var(--color-primary) 50%,
        var(--color-primary) 50%,
        transparent 100%
    );
    animation: line-pulse 2s ease-in-out infinite;
}

@keyframes line-pulse {
    0%, 100% {
        opacity: 0.5;
        transform: scaleY(1);
    }
    50% {
        opacity: 1;
        transform: scaleY(1.1);
    }
}

.transition-text {
    font-family: var(--font-jp);
    font-size: 0.9375rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.2em;
    color: var(--color-secondary);
}

.transition-arrow {
    color: var(--color-primary);
    animation: bounce-down 2s ease-in-out infinite;
    margin-top: var(--space-sm);
}

@keyframes bounce-down {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(10px);
        opacity: 0.5;
    }
}

@media (max-width: 768px) {
    .section-transition {
        padding: var(--space-2xl) 0 var(--space-3xl);
    }
    
    .transition-line {
        height: 40px;
    }
    
    .transition-text {
        font-size: 0.8125rem;
        letter-spacing: 0.15em;
    }
}

/* ============================================
   Mission Section - Interactive Split Layout
   Inspired by ACES Technologies Section
   ============================================ */
.section-mission {
    background-color: var(--color-white);
    padding: 0;
    min-height: 100vh;
    display: flex;
    align-items: stretch;
}

.mission-wrapper {
    display: grid;
    grid-template-columns: 480px 1fr;
    width: 100%;
    min-height: 100vh;
}

@media (max-width: 1200px) {
    .mission-wrapper {
        grid-template-columns: 420px 1fr;
    }
}

@media (max-width: 1024px) {
    .mission-wrapper {
        grid-template-columns: 1fr;
        min-height: auto;
    }
}

/* ============================================
   Mission Navigation (Left Side)
   ============================================ */
.mission-nav {
    background-color: var(--color-white);
    padding: var(--space-4xl) var(--space-3xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    border-right: 1px solid var(--color-gray-200);
}

@media (max-width: 1024px) {
    .mission-nav {
        padding: var(--space-3xl) var(--space-xl);
        border-right: none;
        border-bottom: 1px solid var(--color-gray-200);
    }
}

.mission-nav-header {
    margin-bottom: var(--space-3xl);
}

.mission-nav-header .section-label {
    margin-bottom: var(--space-sm);
}

.mission-nav-header .section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

/* Navigation List */
.mission-nav-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.mission-nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-xl) var(--space-lg);
    border-radius: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    border-left: 3px solid transparent;
    background: transparent;
}

.mission-nav-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(90deg, rgba(86, 105, 85, 0.08) 0%, transparent 100%);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.mission-nav-item:hover::before,
.mission-nav-item.active::before {
    width: 100%;
}

.mission-nav-item:hover,
.mission-nav-item.active {
    border-left-color: var(--color-primary);
}

.mission-nav-item.active {
    background: linear-gradient(90deg, rgba(86, 105, 85, 0.05) 0%, transparent 100%);
}

/* Number */
.mission-nav-number {
    font-family: var(--font-en);
    font-size: 2.875rem;
    font-weight: var(--weight-bold);
    color: var(--color-gray-400);
    min-width: 28px;
    transition: color 0.3s ease;
    position: relative;
    z-index: 1;
}

.mission-nav-item:hover .mission-nav-number,
.mission-nav-item.active .mission-nav-number {
    color: var(--color-primary);
}

/* Content */
.mission-nav-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.mission-nav-title {
    font-size: 1rem;
    font-weight: var(--weight-semibold);
    color: var(--color-dark);
    margin-bottom: 0.25rem;
    transition: color 0.3s ease;
    line-height: 1.5;
}

.mission-nav-item:hover .mission-nav-title,
.mission-nav-item.active .mission-nav-title {
    color: var(--color-primary);
}

.mission-nav-subtitle {
    font-family: var(--font-en);
    font-size: 0.75rem;
    font-weight: var(--weight-medium);
    color: var(--color-gray-500);
    letter-spacing: 0.02em;
    transition: color 0.3s ease;
}

/* Arrow */
.mission-nav-arrow {
    color: var(--color-gray-400);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.mission-nav-item:hover .mission-nav-arrow,
.mission-nav-item.active .mission-nav-arrow {
    opacity: 1;
    transform: translateX(0);
    color: var(--color-primary);
}

/* Progress Bar */
.mission-progress {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background-color: var(--color-gray-200);
}

.mission-progress-bar {
    width: 100%;
    height: 33.33%;
    background-color: var(--color-primary);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    transform: translateY(0);
}

.mission-progress-bar[data-active="1"] {
    transform: translateY(0);
}

.mission-progress-bar[data-active="2"] {
    transform: translateY(100%);
}

.mission-progress-bar[data-active="3"] {
    transform: translateY(200%);
}

@media (max-width: 1024px) {
    .mission-progress {
        display: none;
    }
}

/* ============================================
   Mission Visual (Right Side)
   ============================================ */
.mission-visual {
    position: relative;
    overflow: hidden;
    min-height: 600px;
}

@media (max-width: 1024px) {
    .mission-visual {
        min-height: 500px;
    }
}

@media (max-width: 640px) {
    .mission-visual {
        min-height: 450px;
    }
}

/* Cards Container */
.mission-cards {
    position: relative;
    width: 100%;
    height: 100%;
}

/* Individual Card */
.mission-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform: scale(1.02);
}

.mission-card.active {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

/* Card Background */
.mission-card-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.mission-card-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.mission-card.active .mission-card-bg img {
    transform: scale(1.05);
}

.mission-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(86, 105, 85, 0.3) 0%,
        rgba(45, 55, 45, 0.5) 50%,
        rgba(26, 26, 26, 0.75) 100%
    );
}

/* Card Content */
.mission-card-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-4xl);
    color: var(--color-white);
}

@media (max-width: 768px) {
    .mission-card-content {
        padding: var(--space-2xl);
    }
}

/* Icon */
.mission-card-icon {
    position: absolute;
    top: var(--space-3xl);
    right: var(--space-3xl);
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.8);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.5s ease 0.2s;
}

.mission-card.active .mission-card-icon {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .mission-card-icon {
        top: var(--space-xl);
        right: var(--space-xl);
        width: 48px;
        height: 48px;
    }
    
    .mission-card-icon svg {
        width: 32px;
        height: 32px;
    }
}

/* Number */
.mission-card-number {
    font-family: var(--font-en);
    font-size: 12rem;
    font-weight: var(--weight-bold);
    color: rgba(255, 255, 255, 0.3);
    line-height: 1;
    position: absolute;
    bottom: var(--space-4xl);
    right: var(--space-4xl);
    letter-spacing: -0.02em;
}

@media (max-width: 768px) {
    .mission-card-number {
        font-size: 4rem;
        bottom: var(--space-2xl);
        right: var(--space-2xl);
    }
}

/* Title */
.mission-card-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: var(--weight-semibold);
    margin-bottom: var(--space-lg);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s ease 0.1s;
    max-width: 500px;
}

.mission-card.active .mission-card-title {
    opacity: 1;
    transform: translateY(0);
}

/* Description */
.mission-card-desc {
    font-size: clamp(1rem, 1.5vw, 1.1875rem);  /* 16px〜19px */
    line-height: 1.9;
    color: rgba(255, 255, 255, 0.85);
    max-width: 580px;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s ease 0.2s;
    margin-bottom: var(--space-xl);
}

.mission-card.active .mission-card-desc {
    opacity: 1;
    transform: translateY(0);
}

/* Tags */
.mission-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s ease 0.3s;
}

.mission-card.active .mission-card-tags {
    opacity: 1;
    transform: translateY(0);
}

.mission-tag {
    font-family: var(--font-en);
    font-size: 0.75rem;
    font-weight: var(--weight-medium);
    letter-spacing: 0.02em;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50px;
    color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
}

/* ============================================
   Visual Decorations
   ============================================ */
.mission-visual-decor {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.decor-circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.decor-circle-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: -100px;
    animation: float-slow 8s ease-in-out infinite;
}

.decor-circle-2 {
    width: 200px;
    height: 200px;
    bottom: 10%;
    left: -50px;
    animation: float-slow 10s ease-in-out infinite reverse;
}

.decor-line {
    position: absolute;
    background: linear-gradient(180deg, transparent 0%, rgba(255, 255, 255, 0.1) 50%, transparent 100%);
}

.decor-line-1 {
    width: 1px;
    height: 200px;
    top: 20%;
    left: 10%;
    animation: line-grow 3s ease-in-out infinite;
}

@keyframes float-slow {
    0%, 100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(20px, 20px);
    }
}

@keyframes line-grow {
    0%, 100% {
        opacity: 0;
        transform: scaleY(0);
    }
    50% {
        opacity: 1;
        transform: scaleY(1);
    }
}

/* ============================================
   Mobile Responsive Adjustments
   ============================================ */
@media (max-width: 1024px) {
    .mission-nav-item {
        padding: var(--space-lg) var(--space-md);
    }
    
    .mission-nav-title {
        font-size: 0.9375rem;
    }
}

@media (max-width: 640px) {
    .mission-nav-header {
        margin-bottom: var(--space-xl);
    }
    
    .mission-nav-item {
        gap: var(--space-md);
        padding: var(--space-md);
    }
    
    .mission-nav-number {
        font-size: 0.75rem;
        min-width: 24px;
    }
    
    .mission-nav-title {
        font-size: 0.875rem;
    }
    
    .mission-nav-subtitle {
        font-size: 0.6875rem;
    }
    
    .mission-nav-arrow {
        display: none;
    }
}

/* ============================================
   Services Section - Rich Card Design
   ============================================ */
.section-services {
    background: linear-gradient(
        180deg,
        var(--color-white) 0%,
        var(--color-gray-50) 50%,
        var(--color-white) 100%
    );
    padding: var(--space-6xl) 0;
    position: relative;
    overflow: hidden;
}

/* Section Header Enhancement */
.section-services .section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-subtitle {
    font-size: 0.9375rem;
    color: var(--color-secondary);
    margin-top: var(--space-md);
    letter-spacing: 0.02em;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* Service Card */
.service-card {
    position: relative;
    padding: var(--space-2xl);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(86, 105, 85, 0.15);
}

/* Background Number */
.service-card-bg {
    position: absolute;
    top: 0;
    right: 0;
    pointer-events: none;
    overflow: hidden;
}

.service-bg-number {
    font-family: var(--font-en);
    font-size: 8rem;
    font-weight: var(--weight-bold);
    color: var(--color-gray-100);
    line-height: 1;
    letter-spacing: -0.02em;
    display: block;
    transform: translate(10%, -20%);
    transition: all 0.4s ease;
}

.service-card:hover .service-bg-number {
    color: rgba(86, 105, 85, 0.08);
    transform: translate(10%, -20%) scale(1.1);
}

/* Card Content */
.service-card-content {
    position: relative;
    z-index: 1;
}

/* Service Icon */
.service-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 12px;
    color: var(--color-white);
    margin-bottom: var(--space-lg);
    transition: all 0.4s ease;
}

.service-card:hover .service-icon {
    transform: scale(1.1);
    box-shadow: 0 8px 20px rgba(86, 105, 85, 0.3);
}

/* Service Number */
.service-number {
    font-family: var(--font-en);
    font-size: 0.75rem;
    font-weight: var(--weight-bold);
    color: var(--color-primary);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
    opacity: 0.7;
}

/* Service Title */
.service-title {
    font-family: var(--font-en);
    font-size: 1.25rem;
    font-weight: var(--weight-semibold);
    color: var(--color-black);
    margin-bottom: var(--space-xs);
    transition: color 0.3s ease;
}

.service-card:hover .service-title {
    color: var(--color-primary);
}

.service-title-jp {
    font-size: 0.8125rem;
    color: var(--color-secondary);
    margin-bottom: var(--space-lg);
}

/* Service Description */
.service-desc {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    line-height: 1.8;
    margin-bottom: var(--space-xl);
}

/* Service List */
.service-list {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-gray-200);
    transition: border-color 0.3s ease;
}

.service-card:hover .service-list {
    border-top-color: var(--color-primary-light);
}

.service-list li {
    font-size: 0.875rem;
    color: var(--color-gray-700);
    padding: var(--space-sm) 0;
    padding-left: var(--space-lg);
    position: relative;
    transition: color 0.3s ease;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    transform: translateY(-50%);
    transition: all 0.3s ease;
}

.service-card:hover .service-list li {
    color: var(--color-dark);
}

.service-card:hover .service-list li::before {
    transform: translateY(-50%) scale(1.2);
}

/* Hover Line Animation */
.service-card-hover-line {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover .service-card-hover-line {
    transform: scaleX(1);
}

/* Stagger Animation on Scroll */
.service-card {
    opacity: 0;
    transform: translateY(30px);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.services-grid .service-card:nth-child(1) { transition-delay: 0s; }
.services-grid .service-card:nth-child(2) { transition-delay: 0.15s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.3s; }

/* Responsive Adjustments */
@media (max-width: 1024px) {
    .service-bg-number {
        font-size: 6rem;
    }
}

@media (max-width: 640px) {
    .service-card {
        padding: var(--space-xl);
    }
    
    .service-bg-number {
        font-size: 5rem;
    }
    
    .service-icon {
        width: 48px;
        height: 48px;
        border-radius: 10px;
    }
    
    .service-icon svg {
        width: 24px;
        height: 24px;
    }
}

/* ============================================
   Company Section
   ============================================ */
.section-company {
    background-color: var(--color-warm);
}

.company-content {
    max-width: 800px;
    margin: 0 auto;
}

.info-list {
    display: flex;
    flex-direction: column;
}

.info-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-xl);
    padding: var(--space-lg) 0;
    border-bottom: 1px solid var(--color-warm-dark);
}

@media (max-width: 640px) {
    .info-item {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
}

.info-item:first-child {
    padding-top: 0;
}

.info-item dt {
    font-size: 0.8125rem;
    color: var(--color-secondary);
}

.info-item dd {
    font-size: 0.9375rem;
    color: var(--color-dark);
}

/* ============================================
   Contact Section
   ============================================ */
.section-contact {
    background-color: var(--color-white);
    text-align: center;
    padding: var(--space-6xl) 0;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-header {
    margin-bottom: var(--space-3xl);
}

.contact-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: var(--weight-semibold);
    color: var(--color-black);
    line-height: 1.5;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.contact-lead {
    font-size: 0.9375rem;
    color: var(--color-secondary);
    line-height: 2;
}

.contact-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.contact-note {
    font-size: 0.8125rem;
    color: var(--color-gray-500);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--color-primary-dark);
    color: var(--color-gray-400);
    padding: var(--space-4xl) 0 var(--space-2xl);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: var(--space-3xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

@media (max-width: 768px) {
    .footer-inner {
        flex-direction: column;
        gap: var(--space-2xl);
    }
}

.footer-logo {
    font-family: var(--font-en);
    font-size: 1.25rem;
    font-weight: var(--weight-bold);
    letter-spacing: 0.1em;
    color: var(--color-white);
}

.footer-tagline {
    font-family: var(--font-en);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: var(--space-sm);
    letter-spacing: 0.05em;
}

.footer-nav-list {
    display: flex;
    gap: var(--space-2xl);
}

@media (max-width: 640px) {
    .footer-nav-list {
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
}

.footer-nav-list a {
    font-family: var(--font-en);
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-xl);
}

@media (max-width: 640px) {
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }
}

.footer-copyright {
    font-family: var(--font-en);
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   Animations - Fade In
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.3s; }

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Utility Classes
   ============================================ */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Performance Optimizations
   ============================================ */

/* Reduce layout shift for images */
img {
    height: auto;
}

/* Optimize animations for reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .hero-globe,
    .particle-canvas,
    .hero-lines {
        display: none;
    }
}

/* Print styles */
@media print {
    .header,
    .footer,
    .hero-bg,
    .scroll-indicator,
    .btn {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }
    
    .section {
        page-break-inside: avoid;
    }
}