:root {
    --primary-color: #0d1b2a; 
    --secondary-color: #1b263b;
    --accent-color: #c5a059;  
    --text-color: #e0e1dd;
    --bg-color: #0a1118;
    --white: #ffffff;
    --card-bg: rgba(255,255,255,0.03);
}

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

body {
    font-family: "Sawarabi Mincho", "Hiragino Mincho ProN", serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 5%;
}

/* Header */
header {
    background: var(--primary-color);
    color: var(--white);
    padding: 1.2rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(197, 160, 89, 0.3);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: bold;
    letter-spacing: 4px;
    color: var(--accent-color);
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 30px;
    font-size: 0.95rem;
    transition: color 0.3s;
}

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

/* Hero */
.hero {
    height: 75vh;
    background: linear-gradient(rgba(13,27,42,0.85), rgba(13,27,42,0.85)), url('https://images.unsplash.com/photo-1599420186946-7b6fb4e297f0?auto=format&fit=crop&q=80&w=1500') center/cover;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    letter-spacing: 4px;
    color: var(--white);
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: #b0b0b0;
}

/* Sections */
section { padding: 6rem 0; }

.section-title {
    text-align: center;
    margin-bottom: 4rem;
    font-size: 2.2rem;
    position: relative;
    padding-bottom: 1.5rem;
    color: var(--accent-color);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--accent-color);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.card {
    background: var(--card-bg);
    padding: 2.5rem;
    border: 1px solid rgba(255,255,255,0.05);
    border-left: 3px solid var(--accent-color);
    transition: all 0.3s ease;
}

.card:hover {
    background: rgba(255,255,255,0.06);
    transform: translateY(-5px);
}

.tech-tag {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 0.75rem;
    display: block;
    margin-bottom: 1rem;
    letter-spacing: 2px;
}

.card h3 {
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    color: var(--white);
}

.card p { color: #cccccc; }

/* Maker List */
.maker-list { background: var(--secondary-color); }
.maker-card { border-left: none; border-top: 3px solid var(--accent-color); text-align: center; }
.maker-details { font-size: 0.9rem; line-height: 2; color: #aaaaaa; }

/* Case Studies (新設) */
.case-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.case-item {
    background: var(--card-bg);
    border: 1px solid rgba(197, 160, 89, 0.2);
    padding: 2rem;
    border-radius: 4px;
}

.case-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.case-machine {
    display: inline-block;
    background: rgba(197, 160, 89, 0.1);
    color: var(--accent-color);
    padding: 0.3rem 0.8rem;
    font-size: 0.85rem;
    font-weight: bold;
    margin-bottom: 0.8rem;
    border-radius: 2px;
}

.case-title {
    font-size: 1.3rem;
    color: var(--white);
}

.case-body p {
    color: #bbbbbb;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.case-body strong { color: var(--accent-color); }

/* SLA Box (新設) */
.sla-box {
    background: rgba(197, 160, 89, 0.05);
    border: 1px dashed var(--accent-color);
    padding: 1.5rem 2rem;
    text-align: center;
    max-width: 700px;
    margin: 0 auto 2rem auto;
}

.sla-title {
    color: var(--accent-color);
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.sla-box p { font-size: 0.9rem; color: #cccccc; }
.sla-box strong { color: var(--white); }

/* Contact Form */
.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 3rem;
    border: 1px solid rgba(255,255,255,0.05);
}

.form-group { margin-bottom: 2rem; }

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    color: var(--accent-color);
    font-size: 0.95rem;
}

.required {
    background: #8b0000;
    color: white;
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    margin-left: 0.5rem;
    border-radius: 2px;
}

.custom-form input, .custom-form textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(197, 160, 89, 0.3);
    color: var(--white);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.custom-form input:focus, .custom-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(0,0,0,0.5);
}

.form-submit { text-align: center; margin-top: 3rem; }

.btn-contact {
    display: inline-block;
    background: var(--accent-color);
    color: var(--primary-color);
    padding: 1.2rem 3rem;
    text-decoration: none;
    font-weight: bold;
    letter-spacing: 2px;
    transition: all 0.3s;
    border: 1px solid var(--accent-color);
    cursor: pointer;
}

.btn-contact:hover {
    background: transparent;
    color: var(--accent-color);
}

.form-btn { width: 100%; max-width: 300px; }

/* Footer */
footer {
    background: var(--primary-color);
    color: #888888;
    text-align: center;
    padding: 4rem 0;
    font-size: 0.85rem;
    border-top: 1px solid rgba(197, 160, 89, 0.2);
}

footer p { margin-bottom: 0.5rem; }

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

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

/* Responsive */
@media (max-width: 768px) {
    .hero-content h1 { font-size: 2.2rem; }
    .header-inner { flex-direction: column; text-align: center; }
    nav { margin-top: 1.5rem; }
    nav a { margin: 0 10px; }
    .contact-form-wrapper { padding: 1.5rem; }
    .sla-box { padding: 1.5rem; margin: 0 5% 2rem 5%; }
}