:root {
    --color-primary: #1a365d;
    --color-primary-light: #2c5282;
    --color-primary-dark: #0f2744;
    --color-accent: #d69e2e;
    --color-accent-hover: #b7791f;
    --color-text: #2d3748;
    --color-text-light: #4a5568;
    --color-text-muted: #718096;
    --color-bg: #ffffff;
    --color-bg-alt: #f7fafc;
    --color-bg-dark: #1a202c;
    --color-border: #e2e8f0;
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

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

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo a {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    color: var(--color-primary);
    text-decoration: none;
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: 2px;
}

.logo-sub {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 400;
}

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

.nav-link {
    position: relative;
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: color var(--transition-fast);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

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

.nav-toggle {
    display: none;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    position: relative;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    bottom: -8px;
}

.nav-toggle[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: translateY(-8px) rotate(-45deg);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
}

.hero-background {
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.8;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-3xl);
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(var(--font-size-base), 2vw, var(--font-size-xl));
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-2xl);
    background-color: var(--color-accent);
    color: #ffffff;
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--border-radius);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.hero-button:hover {
    background-color: var(--color-accent-hover);
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.business {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg);
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
}

.business-card {
    background-color: var(--color-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--transition-base);
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.business-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-primary);
    transition: color var(--transition-base);
}

.business-card:hover .business-icon {
    color: var(--color-accent);
}

.business-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.business-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

.about-preview {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-alt);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.about-text:last-of-type {
    margin-bottom: var(--spacing-2xl);
}

.about-button {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-2xl);
    background-color: transparent;
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-base);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius);
    transition: all var(--transition-base);
}

.about-button:hover {
    background-color: var(--color-primary);
    color: #ffffff;
}

.page-hero {
    position: relative;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
    padding-top: 70px;
}

.page-hero-background {
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.8;
}

.page-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-3xl);
    animation: fadeInUp 1s ease-out;
}

.page-title {
    font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-4xl));
    font-weight: 700;
    color: #ffffff;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.page-subtitle {
    font-size: clamp(var(--font-size-sm), 2vw, var(--font-size-lg));
    color: rgba(255, 255, 255, 0.9);
}

.company-intro {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg);
}

.intro-content {
    max-width: 900px;
    margin: 0 auto;
}

.intro-text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.9;
}

.intro-text p {
    margin-bottom: var(--spacing-lg);
}

.intro-text p:last-child {
    margin-bottom: 0;
}

.culture {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-alt);
}

.culture-mission {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
    padding: var(--spacing-2xl);
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.mission-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-accent);
}

.mission-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.mission-desc {
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-light);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    max-width: 1200px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .culture-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.culture-card {
    background-color: var(--color-bg);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.culture-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.culture-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-lg);
    color: var(--color-accent);
}

.culture-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.culture-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.7;
}

.contact {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-alt);
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    color: var(--color-accent);
}

.contact-text h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

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

.footer {
    background-color: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: #ffffff;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--color-accent);
}

.footer-desc {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-accent);
}

.footer-contact {
    font-style: normal;
    font-size: var(--font-size-sm);
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.copyright {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-sm);
}

.icp-info a {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--transition-fast);
}

.icp-info a:hover {
    color: var(--color-accent);
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

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

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-list {
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-bg);
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        display: none;
    }

    .nav-list.active {
        display: flex;
    }

    .nav-link {
        padding: var(--spacing-md);
        display: block;
    }

    .hero {
        min-height: 100vh;
    }

    .hero-content {
        padding: var(--spacing-xl);
    }

    .page-hero {
        min-height: 40vh;
    }

    .section-title {
        font-size: var(--font-size-2xl);
    }

    .business-grid,
    .culture-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .contact-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}