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

:root {
    --seain-primary: #0066FF;
    --seain-primary-dark: #0052CC;
    --seain-primary-light: #3385FF;
    --seain-secondary: #FF6B35;
    --seain-accent: #00D4FF;
    --seain-accent-light: #33DDFF;
    --seain-dark: #0A0E27;
    --seain-dark-light: #1A1F3A;
    --seain-gray: #6B7280;
    --seain-gray-light: #9CA3AF;
    --seain-light-gray: #F3F4F6;
    --seain-bg-light: #FAFBFC;
    --seain-white: #FFFFFF;
    --seain-gradient-primary: linear-gradient(135deg, #0066FF 0%, #00D4FF 100%);
    --seain-gradient-secondary: linear-gradient(135deg, #FF6B35 0%, #FF8C42 100%);
    --seain-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --seain-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --seain-shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --seain-shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.16);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Roboto', 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--seain-dark);
    overflow-x: hidden;
    background: var(--seain-white);
}

.seain-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

.seain-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.seain-nav {
    padding: 20px 0;
}

.seain-nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.seain-logo {
    width: 320px;
    height: 60px;
    background-image: url('img/company-logo.svg');
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center;
}

.seain-nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.seain-nav-link {
    text-decoration: none;
    color: var(--seain-dark);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
    letter-spacing: -0.01em;
}

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

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

.seain-nav-link.seain-nav-active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--seain-gradient-primary);
    border-radius: 2px;
}

.seain-mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.seain-mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--seain-dark);
    transition: all 0.3s ease;
    border-radius: 2px;
}

.seain-mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background: var(--seain-white);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    transition: right 0.3s ease;
    padding: 80px 40px;
}

.seain-mobile-menu-active {
    right: 0;
}

.seain-mobile-menu-close {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 32px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--seain-dark);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: background 0.3s ease;
}

.seain-mobile-menu-close:hover {
    background: var(--seain-light-gray);
}

.seain-mobile-nav-menu {
    list-style: none;
}

.seain-mobile-nav-link {
    display: block;
    padding: 16px 0;
    text-decoration: none;
    color: var(--seain-dark);
    font-weight: 500;
    font-size: 18px;
    border-bottom: 1px solid var(--seain-light-gray);
    transition: color 0.3s ease;
}

.seain-mobile-nav-link:hover {
    color: var(--seain-primary);
}

.seain-page-hero {
    padding: 180px 0 120px;
    background: var(--seain-gradient-primary);
    color: var(--seain-white);
    position: relative;
    overflow: hidden;
}

.seain-page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.2) 0%, transparent 50%);
    opacity: 0.8;
}

.seain-page-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.seain-page-hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    margin-bottom: 32px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.seain-page-hero-title {
    font-size: 64px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.seain-page-hero-subtitle {
    font-size: 22px;
    opacity: 0.95;
    line-height: 1.6;
}

.seain-service-detail {
    padding: 120px 0;
    background: var(--seain-white);
}

.seain-service-detail-content {
    max-width: 900px;
    margin: 0 auto;
}

.seain-service-detail-main {
    background: var(--seain-white);
    padding: 60px;
    border-radius: 24px;
    box-shadow: var(--seain-shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.seain-service-detail-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--seain-dark);
    line-height: 1.2;
    margin-top: 60px;
}

.seain-service-detail-title:first-child {
    margin-top: 0;
}

.seain-service-detail-text {
    font-size: 18px;
    color: var(--seain-gray);
    line-height: 1.8;
    margin-bottom: 24px;
}

.seain-specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin: 40px 0;
}

.seain-spec-item {
    background: var(--seain-bg-light);
    padding: 32px;
    border-radius: 16px;
    text-align: center;
}

.seain-spec-icon {
    font-size: 48px;
    margin-bottom: 16px;
    line-height: 1;
}

.seain-spec-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--seain-dark);
}

.seain-spec-description {
    font-size: 16px;
    color: var(--seain-gray);
    line-height: 1.6;
}

.seain-process-detail {
    margin: 40px 0;
}

.seain-process-detail-step {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    align-items: flex-start;
}

.seain-process-detail-number {
    width: 48px;
    height: 48px;
    background: var(--seain-gradient-primary);
    color: var(--seain-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    flex-shrink: 0;
}

.seain-process-detail-content {
    flex: 1;
}

.seain-process-detail-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--seain-dark);
}

.seain-process-detail-text {
    font-size: 16px;
    color: var(--seain-gray);
    line-height: 1.7;
}

.seain-contact-cta {
    padding: 120px 0;
    background: var(--seain-bg-light);
}

.seain-contact-cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.seain-contact-cta-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--seain-dark);
    line-height: 1.2;
}

.seain-contact-cta-description {
    font-size: 18px;
    color: var(--seain-gray);
    margin-bottom: 40px;
    line-height: 1.7;
}

.seain-contact-cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.seain-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    cursor: pointer;
    letter-spacing: -0.01em;
}

.seain-btn-primary {
    background: var(--seain-gradient-primary);
    color: var(--seain-white);
    box-shadow: var(--seain-shadow-md);
}

.seain-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--seain-shadow-lg);
}

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

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

.seain-footer {
    background: var(--seain-dark);
    color: var(--seain-white);
    padding: 80px 0 32px;
}

.seain-footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 80px;
    margin-bottom: 60px;
}

.seain-footer-logo {
    filter: brightness(0) invert(1);
}

.seain-footer-description {
    margin-top: 24px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    font-size: 16px;
}

.seain-footer-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

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

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

.seain-footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

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

.seain-footer-contact {
    list-style: none;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    font-size: 15px;
}

.seain-footer-contact a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.seain-footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.seain-footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

@media (max-width: 1024px) {
    .seain-container {
        padding: 0 32px;
    }

    .seain-page-hero-title {
        font-size: 48px;
    }

    .seain-specs-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .seain-nav-menu {
        display: none;
    }

    .seain-mobile-menu-btn {
        display: flex;
    }

    .seain-page-hero {
        padding: 140px 0 80px;
    }

    .seain-page-hero-title {
        font-size: 36px;
    }

    .seain-service-detail {
        padding: 80px 0;
    }

    .seain-service-detail-main {
        padding: 40px 30px;
    }

    .seain-service-detail-title {
        font-size: 28px;
    }

    .seain-contact-cta {
        padding: 80px 0;
    }

    .seain-contact-cta-title {
        font-size: 32px;
    }

    .seain-contact-cta-buttons {
        flex-direction: column;
    }

    .seain-btn {
        width: 100%;
    }

    .seain-container {
        padding: 0 24px;
    }

    .seain-footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .seain-page-hero-title {
        font-size: 32px;
    }

    .seain-service-detail-title {
        font-size: 24px;
    }
}