:root {
    --bg-color: #f0f4f8;
    --text-color: #333333;
    --text-muted: rgba(0, 0, 0, 0.6);
    --primary-gradient: linear-gradient(135deg, #00c6fb 0%, #005bea 100%);
    --bg-gradient: linear-gradient(120deg, #fdfbfb 0%, #ebedee 100%);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --font-main: 'Noto Sans JP', sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    background: var(--bg-gradient);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.05em;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.8;
}

.nav a:hover {
    opacity: 1;
    color: #005bea;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 1rem;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(0, 198, 251, 0.1), transparent 60%);
    animation: rotate 20s linear infinite;
    z-index: -1;
}

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

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

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
}

/* Section Common */
.section {
    padding: 100px 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* Glass Card */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--glass-shadow);
}

/* About */
.about-text {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-align: center;
}

/* Service */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }
}

.service-card h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #005bea;
}

.service-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Company */
.company-info dl {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1.5rem 0;
}

.company-info dt {
    font-weight: 700;
    color: #005bea;
}

.company-info dd {
    color: var(--text-muted);
}

/* Contact */
.footer-contact {
    text-align: center;
}

.footer-contact p {
    margin-bottom: 2rem;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--primary-gradient);
    color: #fff;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.6);
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Animation */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* Mobile Responsive Adjustments */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }
}