@charset "UTF-8";

/* --- 変数定義 --- */
:root {
  --color-primary: #0052cc;
  --color-primary-dark: #003d99;
  --color-accent: #00d2ff;
  --color-bg-dark: #0a0f1d;
  --color-bg-card: #121929;
  --color-bg-light: #f8fafc;
  --color-text-main: #1e293b;
  --color-text-muted: #64748b;
  --color-text-white: #ffffff;
  --color-border: #e2e8f0;
  
  --font-main: 'Noto Sans JP', sans-serif;
  --font-en: 'Orbitron', sans-serif;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- リセット & ベース --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
}

body {
  font-family: var(--font-main);
  color: var(--color-text-main);
  background-color: #ffffff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul {
  list-style: none;
}

/* 自然なテキストリンク */
.plain-link {
  color: inherit;
  text-decoration: underline;
}

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

/* --- 共通クラス --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.text-center {
  text-align: center;
}

.section-title-wrap {
  margin-bottom: 50px;
}

.section-sub {
  font-family: var(--font-en);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1.4;
}

/* --- ボタン --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  letter-spacing: 0.05em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-text-white);
  box-shadow: 0 4px 14px rgba(0, 82, 204, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 82, 204, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text-white);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: var(--color-text-white);
}

/* --- ヘッダー --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 20px 0;
  background-color: rgba(10, 15, 29, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.header.scrolled {
  background-color: #0a0f1d;
  padding: 14px 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-en);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-text-white);
  letter-spacing: 0.05em;
}

.logo-icon {
  width: 34px;
  height: 34px;
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-list a {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.1em;
  position: relative;
  padding-bottom: 4px;
}

.nav-list a:hover,
.nav-list a.active {
  color: var(--color-accent);
}

.nav-list a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--color-text-white);
  transition: var(--transition);
}

/* --- 下層ページ用ヘッダー --- */
.page-header {
  background-color: var(--color-bg-dark);
  padding: 160px 0 60px;
  color: var(--color-text-white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.page-header .section-sub {
  color: var(--color-accent);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
}

/* --- ヒーローセクション (画面ぴったり表示) --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-dark);
  color: var(--color-text-white);
  padding: 100px 24px 40px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 70% 30%, rgba(0, 82, 204, 0.3) 0%, transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(0, 210, 255, 0.18) 0%, transparent 50%);
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, rgba(10, 15, 29, 0.3) 0%, rgba(10, 15, 29, 0.85) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.hero-sub {
  font-family: var(--font-en);
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: 16px;
  font-weight: 600;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.hero-catch {
  font-size: 1.4rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 24px;
}

.hero-text {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-btn-group {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* --- ABOUT --- */
.about {
  background-color: #ffffff;
}

.about-lead {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 24px;
}

.about-text-box {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-text-box p {
  margin-bottom: 16px;
  color: var(--color-text-muted);
}

.about-subtext {
  font-size: 0.9rem;
  margin-top: 24px !important;
}

/* --- SERVICES --- */
.services {
  background-color: var(--color-bg-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.service-card {
  background-color: #ffffff;
  padding: 40px 32px;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
  border-color: var(--color-primary);
}

.service-icon {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.3;
  margin-bottom: 20px;
}

.service-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 事業詳細ページ用 */
.detail-block {
  display: flex;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
}

.detail-block:last-child {
  border-bottom: none;
}

.detail-num {
  font-family: var(--font-en);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

.detail-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

/* --- COMPANY SUMMARY --- */
.company-summary {
  background-color: var(--color-bg-dark);
  color: var(--color-text-white);
  text-align: center;
}

.company-summary .section-sub {
  color: var(--color-accent);
}

.summary-text {
  max-width: 700px;
  margin: 0 auto 32px;
  color: rgba(255, 255, 255, 0.7);
}

/* --- COMPANY / NETWORK --- */
.sub-heading {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
  border-left: 4px solid var(--color-primary);
  padding-left: 12px;
}

.company-table-wrap {
  max-width: 900px;
  margin: 0 auto;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
}

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

.company-table th {
  width: 25%;
  font-weight: 700;
  color: var(--color-text-main);
  background-color: var(--color-bg-light);
}

.company-table td {
  color: var(--color-text-muted);
}

.network-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.network-card {
  background-color: var(--color-bg-card);
  color: var(--color-text-white);
  padding: 40px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.network-tag {
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.15em;
  margin-bottom: 12px;
}

.network-name {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.network-address {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 16px;
  font-weight: 500;
}

.network-desc {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* --- FOOTER --- */
.footer {
  background-color: #060913;
  color: var(--color-text-white);
  padding: 50px 0 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.footer-links ul {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-family: var(--font-en);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.05em;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
}

/* --- レスポンシブ --- */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.5rem;
  }
  .hero-catch {
    font-size: 1.2rem;
  }
  
  .services-grid,
  .network-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--color-bg-dark);
    padding: 80px 40px;
    transition: var(--transition);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
  }

  .nav.active {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .hero-title {
    font-size: 2rem;
  }
  .hero-catch {
    font-size: 1.05rem;
  }

  .hero-btn-group {
    flex-direction: column;
  }

  .detail-block {
    flex-direction: column;
    gap: 12px;
  }

  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
  }

  .company-table th {
    border-bottom: none;
    padding-bottom: 4px;
  }

  .company-table td {
    padding-top: 4px;
  }

  .footer-container {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }

  .footer-links ul {
    flex-direction: column;
    gap: 12px;
  }
}