:root {
    --primary-color: #333;
    --accent-color: #0076ff;
    --bg-color: #ffffff;
    --section-bg: #f9f9f9;
    --text-color: #333;
    --text-light: #666;
    --border-color: #eee;
    --max-width: 1000px;
}

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

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

ul {
    list-style: none;
}

/* Header */
header {
    height: 80px;
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
}

nav ul {
    display: flex;
    align-items: center;
    gap: 30px;
}

nav ul li a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
}

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

/* Hero */
#hero {
    padding: 160px 0;
    background: radial-gradient(circle at top right, #f0f7ff 0%, #ffffff 50%);
    text-align: center;
}

.hero-content h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-content p {
    font-size: 18px;
    color: var(--text-light);
}

/* Sections */
section {
    padding: 100px 0;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 2px;
    background: var(--accent-color);
    margin: 15px auto 0;
}

.center {
    text-align: center;
    margin-bottom: 40px;
}

/* News List */
.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-list li {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 30px;
    align-items: baseline;
}

.news-list li:first-child {
    border-top: 1px solid var(--border-color);
}

.news-list .date {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
    min-width: 90px;
}

.news-list .news-content {
    font-size: 15px;
}

/* Service Grid */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.service-card {
    padding: 40px 30px;
    background: var(--section-bg);
    border-radius: 8px;
    transition: 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.service-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-light);
}

/* Strengths */
#strengths {
    background-color: var(--section-bg);
}

.strength-list {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 10px 30px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    transition: 0.3s;
}

.tag:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Company Table */
.company-table {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    border-collapse: collapse;
}

.company-table th, .company-table td {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.company-table th {
    width: 30%;
    color: var(--text-light);
    font-weight: 500;
}

/* Contact */
.contact-box {
    text-align: center;
    padding: 80px 40px;
    background: #f0f7ff;
    border-radius: 12px;
}

.contact-box p {
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--primary-color);
    color: white !important;
    border-radius: 4px;
    font-weight: 500;
}

.btn:hover {
    opacity: 0.8;
}

/* Footer */
footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-light);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    header {
        height: auto;
        padding: 20px 0;
    }

    header .container {
        flex-direction: column;
        gap: 15px;
    }

    nav ul {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    nav ul li a {
        font-size: 13px;
    }

    #hero {
        padding: 100px 0;
    }

    .hero-content h2 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 16px;
    }
    
    section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 26px;
        margin-bottom: 40px;
    }

    .service-grid {
        grid-template-columns: 1fr;
    }

    .company-table th {
        width: 40%;
        padding: 15px 10px;
        font-size: 14px;
    }

    .company-table td {
        padding: 15px 10px;
        font-size: 14px;
    }
}