:root {
    --color-primary: #FF4D00;
    --color-primary-dark: #CC3D00;
    --color-primary-light: #FF6B33;
    --color-dark: #0A0A0A;
    --color-dark-lighter: #141414;
    --color-dark-accent: #1A1A1A;
    --color-light: #FFFFFF;
    --color-gray: #888888;
    --color-gray-dark: #444444;
    --font-display: 'Bebas Neue', sans-serif;
    --font-heading: 'Outfit', 'Noto Sans JP', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
    --font-brand: 'Shippori Mincho B1', '游明朝体', 'Yu Mincho', 'YuMincho', 'Hiragino Mincho ProN', 'Hiragino Mincho Pro', 'Noto Serif JP', serif;
    --section-padding: 120px;
    --container-width: 1400px;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-body); background: var(--color-dark); color: var(--color-light); line-height: 1.7; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 40px; }
@media (max-width: 768px) { .container { padding: 0 20px; } }

.header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; padding: 20px 0; transition: var(--transition-base); }
.header.scrolled { background: rgba(10, 10, 10, 0.95); backdrop-filter: blur(20px); padding: 16px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
.header-inner { max-width: var(--container-width); margin: 0 auto; padding: 0 40px; display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 16px; }
.logo-icon { width: 52px; height: 52px; display: flex; align-items: center; justify-content: center; }
.logo-icon img { width: 100%; height: auto; display: block; }
.logo-text { font-family: var(--font-brand); font-size: 20px; font-weight: 600; letter-spacing: 0.1em; color: var(--color-light); }
.nav-list { display: flex; align-items: center; gap: 8px; list-style: none; }
.nav-link { font-family: var(--font-brand); font-size: 15px; font-weight: 500; letter-spacing: 0.08em; position: relative; padding: 10px 20px; transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94); background: transparent; border: 1px solid transparent; border-radius: 30px; overflow: hidden; }
.nav-link::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(255,77,0,0.1) 0%, rgba(255,107,51,0.05) 100%); border-radius: 30px; opacity: 0; transition: opacity 0.4s ease; }
.nav-link:hover { color: var(--color-primary); border-color: rgba(255,77,0,0.3); }
.nav-link:hover::before { opacity: 1; }
.nav-link--contact { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); padding: 12px 28px; border-radius: 30px; font-weight: 600; letter-spacing: 0.1em; box-shadow: 0 4px 20px rgba(255,77,0,0.3); }
.nav-link--contact::before { display: none; }
.nav-link--contact:hover { transform: translateY(-3px) scale(1.02); box-shadow: 0 8px 30px rgba(255,77,0,0.5); }

.hamburger { display: none; width: 32px; height: 24px; position: relative; }
.hamburger span { position: absolute; width: 100%; height: 2px; background: var(--color-light); left: 0; transition: var(--transition-base); }
.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 50%; transform: translateY(-50%); }
.hamburger span:nth-child(3) { bottom: 0; }
.hamburger.active span:nth-child(1) { top: 50%; transform: translateY(-50%) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { bottom: 50%; transform: translateY(50%) rotate(-45deg); }

@media (max-width: 1024px) {
    .hamburger { display: block; z-index: 1001; }
    .nav { position: fixed; top: 0; left: 0; right: 0; bottom: 0; width: 100%; height: 100vh; background: var(--color-dark); display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: var(--transition-base); z-index: 1000; }
    .nav.active { opacity: 1; visibility: visible; }
    .nav-list { flex-direction: column; gap: 32px; }
    .nav-link { font-size: 24px; }
}
@media (max-width: 768px) { .header-inner { padding: 0 20px; } }

.page-hero { padding: 180px 0 100px; position: relative; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, #0f2a24 0%, #1d5a4a 100%); opacity: 0.8; }
.page-hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to bottom, transparent 0%, rgba(10, 10, 10, 0.9) 100%); }
.page-hero-content { position: relative; z-index: 1; }
.page-hero-label { font-family: var(--font-heading); font-size: 13px; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--color-primary); display: block; margin-bottom: 16px; }
.page-hero-title { font-family: var(--font-brand); font-size: clamp(36px, 6vw, 64px); font-weight: 700; letter-spacing: 0.08em; margin-bottom: 24px; }
.page-hero-desc { font-size: 18px; color: var(--color-gray); max-width: 640px; line-height: 1.9; }

.breadcrumb { padding: 24px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); }
.breadcrumb-list { display: flex; align-items: center; gap: 12px; list-style: none; font-size: 13px; }
.breadcrumb-list li { display: flex; align-items: center; gap: 12px; }
.breadcrumb-list a { color: var(--color-gray); transition: var(--transition-base); }
.breadcrumb-list a:hover { color: var(--color-primary); }
.breadcrumb-list span { color: var(--color-gray); }
.breadcrumb-list .current { color: var(--color-light); }

.content-section { padding: var(--section-padding) 0; }
.content-section--alt { background: var(--color-dark-lighter); }
.section-header { margin-bottom: 60px; }
.section-header--center { text-align: center; }
.section-label { font-family: var(--font-heading); font-size: 13px; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--color-primary); display: block; margin-bottom: 16px; }
.section-title { font-family: var(--font-heading); font-size: clamp(28px, 4vw, 48px); font-weight: 700; line-height: 1.2; }
.section-desc { font-size: 16px; color: var(--color-gray); margin-top: 16px; max-width: 720px; }
.section-header--center .section-desc { margin-left: auto; margin-right: auto; }

.service-types-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.service-type-card { background: var(--color-dark-accent); border-radius: 16px; padding: 40px; border: 1px solid rgba(255, 255, 255, 0.05); transition: var(--transition-base); }
.service-type-card:hover { border-color: rgba(255, 77, 0, 0.3); transform: translateY(-4px); }
.service-type-icon { width: 64px; height: 64px; background: rgba(255, 77, 0, 0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--color-primary); margin-bottom: 24px; }
.service-type-title { font-family: var(--font-heading); font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.service-type-text { font-size: 15px; color: var(--color-gray); line-height: 1.9; margin-bottom: 20px; }
.service-type-list { list-style: none; }
.service-type-list li { font-size: 14px; color: var(--color-gray); padding: 8px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.05); display: flex; align-items: center; gap: 12px; }
.service-type-list li::before { content: ''; width: 6px; height: 6px; background: var(--color-primary); border-radius: 50%; flex-shrink: 0; }
@media (max-width: 768px) { .service-types-grid { grid-template-columns: 1fr; } .service-type-card { padding: 28px; } }

.flow-list { display: flex; flex-direction: column; }
.flow-item { display: grid; grid-template-columns: 80px 1fr; gap: 32px; position: relative; padding-bottom: 48px; }
.flow-item:last-child { padding-bottom: 0; }
.flow-item::before { content: ''; position: absolute; left: 39px; top: 80px; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--color-primary), rgba(255, 77, 0, 0.1)); }
.flow-item:last-child::before { display: none; }
.flow-number { width: 80px; height: 80px; background: rgba(255, 77, 0, 0.1); border: 2px solid var(--color-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-family: var(--font-display); font-size: 32px; color: var(--color-primary); flex-shrink: 0; }
.flow-content { padding-top: 16px; }
.flow-title { font-family: var(--font-heading); font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.flow-text { font-size: 15px; color: var(--color-gray); line-height: 1.9; }
@media (max-width: 768px) { .flow-item { grid-template-columns: 60px 1fr; gap: 20px; } .flow-number { width: 60px; height: 60px; font-size: 24px; } .flow-item::before { left: 29px; top: 60px; } }

.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.feature-card { background: var(--color-dark); border-radius: 16px; padding: 40px; border: 1px solid rgba(255, 255, 255, 0.05); text-align: center; transition: var(--transition-base); }
.feature-card:hover { border-color: rgba(255, 77, 0, 0.3); transform: translateY(-4px); }
.feature-icon { width: 72px; height: 72px; background: rgba(255, 77, 0, 0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--color-primary); margin: 0 auto 24px; }
.feature-title { font-family: var(--font-heading); font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.feature-text { font-size: 14px; color: var(--color-gray); line-height: 1.8; }
@media (max-width: 1024px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .features-grid { grid-template-columns: 1fr; } .feature-card { padding: 28px; } }

.cta-section { padding: var(--section-padding) 0; background: linear-gradient(135deg, rgba(255, 77, 0, 0.1) 0%, transparent 100%); text-align: center; }
.cta-title { font-family: var(--font-heading); font-size: clamp(24px, 4vw, 40px); font-weight: 700; margin-bottom: 16px; }
.cta-text { font-size: 16px; color: var(--color-gray); margin-bottom: 40px; max-width: 640px; margin-left: auto; margin-right: auto; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 12px; font-family: var(--font-heading); font-size: 15px; font-weight: 600; padding: 18px 36px; border-radius: 4px; transition: var(--transition-base); }
.btn--primary { background: var(--color-primary); color: var(--color-light); }
.btn--primary:hover { background: var(--color-primary-light); transform: translateY(-2px); box-shadow: 0 10px 30px rgba(255, 77, 0, 0.3); }
.btn--ghost { border: 1px solid rgba(255, 255, 255, 0.2); color: var(--color-light); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

.footer { padding: 80px 0 40px; background: var(--color-dark-lighter); border-top: 1px solid rgba(255, 255, 255, 0.05); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 60px; margin-bottom: 60px; }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.footer-brand-icon { width: 40px; height: 40px; }
.footer-brand-icon img { width: 100%; height: auto; }
.footer-brand-text { font-family: var(--font-brand); font-size: 16px; font-weight: 700; letter-spacing: 0.08em; }
.footer-desc { font-size: 14px; color: var(--color-gray); line-height: 1.8; }
.footer-heading { font-family: var(--font-heading); font-size: 14px; font-weight: 600; margin-bottom: 20px; color: var(--color-light); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: var(--color-gray); transition: var(--transition-base); }
.footer-links a:hover { color: var(--color-primary); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: 40px; border-top: 1px solid rgba(255, 255, 255, 0.05); }
.footer-copy { font-size: 13px; color: var(--color-gray); }
.footer-social { display: flex; gap: 16px; }
.footer-social a { width: 40px; height: 40px; background: rgba(255, 255, 255, 0.05); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--color-gray); transition: var(--transition-base); }
.footer-social a:hover { background: var(--color-primary); color: var(--color-light); }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; } }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; gap: 20px; text-align: center; } }

.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; background: var(--color-primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--color-light); opacity: 0; visibility: hidden; transition: var(--transition-base); z-index: 100; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-light); transform: translateY(-4px); }

/* Works Grid - モバイル対応 */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
@media (max-width: 1024px) {
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}
@media (max-width: 768px) {
    .works-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}