/* ===========================
   アスリンカ株式会社 スタイルシート
   =========================== */

:root {
  --navy: #0d2249;
  --navy-light: #1a3a6b;
  --navy-dark: #081630;
  --accent: #2a6dd9;
  --accent-light: #4a8df0;
  --white: #ffffff;
  --gray-100: #f8f9fc;
  --gray-200: #e9ecef;
  --gray-400: #9098a8;
  --gray-700: #495057;
  --text: #1a1e2e;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  font-size: 16px;
}

/* ===========================
   ヘッダー
   =========================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--navy-dark);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
}

.logo-en {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.08em;
  line-height: 1;
}

.logo-ja {
  font-size: 10px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.15em;
  margin-top: 3px;
}

nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 4px;
  letter-spacing: 0.05em;
  transition: all 0.2s;
}

nav a:hover,
nav a.active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

nav a.btn-contact {
  background: var(--accent);
  color: var(--white);
  font-weight: 600;
}

nav a.btn-contact:hover {
  background: var(--accent-light);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  padding: 10px;
  background: rgba(255, 255, 255, 0.12);
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  border-radius: 6px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2.5px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===========================
   モバイルメニュー
   =========================== */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background: var(--navy-dark);
  z-index: 999;
  padding: 16px 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 14px 32px;
  font-size: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.2s;
}

.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

/* ===========================
   ページコンテナ共通
   =========================== */
main {
  padding-top: var(--header-height);
  min-height: 100vh;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===========================
   ヒーローセクション（トップ）
   =========================== */
.hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 50%, var(--navy-light) 100%);
  color: var(--white);
  padding: 120px 0 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(42, 109, 217, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(74, 141, 240, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-tag {
  display: inline-block;
  background: rgba(42, 109, 217, 0.3);
  border: 1px solid rgba(74, 141, 240, 0.5);
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  letter-spacing: 0.2em;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: 0.03em;
}

.hero h1 .accent {
  color: var(--accent-light);
}

.hero-desc {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.75);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.05em;
  transition: all 0.25s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(42, 109, 217, 0.4);
}

.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 6px 20px rgba(42, 109, 217, 0.5);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

/* ===========================
   特徴セクション（トップ）
   =========================== */
.features {
  padding: 96px 0;
  background: var(--gray-100);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  display: inline-block;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(22px, 3.5vw, 32px);
  font-weight: 700;
  color: var(--navy-dark);
  line-height: 1.4;
  letter-spacing: 0.03em;
}

.section-title .accent {
  color: var(--accent);
}

.section-desc {
  margin-top: 16px;
  color: var(--gray-400);
  font-size: 15px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--white);
  border-radius: 12px;
  padding: 40px 32px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--gray-200);
  transition: transform 0.25s, box-shadow 0.25s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(13, 34, 73, 0.12);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--accent) 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 24px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--gray-700);
  font-size: 14px;
  line-height: 1.8;
}

/* ===========================
   会社概要プレビュー（トップ）
   =========================== */
.about-preview {
  padding: 96px 0;
}

.about-preview-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-preview-text .section-header {
  text-align: left;
  margin-bottom: 24px;
}

.about-preview-text p {
  color: var(--gray-700);
  line-height: 1.9;
  margin-bottom: 32px;
}

.about-preview-visual {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  border-radius: 16px;
  padding: 48px 40px;
  color: var(--white);
}

.company-info-list {
  list-style: none;
}

.company-info-list li {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 14px;
}

.company-info-list li:last-child {
  border-bottom: none;
}

.company-info-list .label {
  color: rgba(255, 255, 255, 0.5);
  min-width: 72px;
  font-size: 12px;
  letter-spacing: 0.05em;
  padding-top: 2px;
}

.company-info-list .value {
  color: rgba(255, 255, 255, 0.9);
}

/* ===========================
   事業概要プレビュー（トップ）
   =========================== */
.business-preview {
  padding: 96px 0;
  background: var(--gray-100);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.business-card {
  background: var(--white);
  border-radius: 12px;
  padding: 40px 36px;
  border: 1px solid var(--gray-200);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
  transition: transform 0.25s, box-shadow 0.25s;
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent) 0%, var(--navy) 100%);
}

.business-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(13, 34, 73, 0.1);
}

.business-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 12px;
}

.business-card p {
  color: var(--gray-700);
  font-size: 14px;
  line-height: 1.8;
}

/* ===========================
   CTAセクション
   =========================== */
.cta-section {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  padding: 80px 0;
  text-align: center;
  color: var(--white);
}

.cta-section h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 32px;
  font-size: 15px;
}

/* ===========================
   ページヘッダー（内部ページ）
   =========================== */
.page-hero {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  color: var(--white);
  padding: 80px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  right: -100px;
  top: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(42, 109, 217, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.page-hero-content {
  position: relative;
  z-index: 1;
}

.page-hero .section-label {
  color: rgba(255, 255, 255, 0.6);
}

.page-hero h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-top: 8px;
  letter-spacing: 0.05em;
}

/* ===========================
   会社概要ページ
   =========================== */
.company-section {
  padding: 80px 0;
}

.company-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--gray-200);
}

.company-table tr {
  border-bottom: 1px solid var(--gray-200);
}

.company-table tr:last-child {
  border-bottom: none;
}

.company-table th {
  background: var(--gray-100);
  width: 200px;
  padding: 20px 28px;
  text-align: left;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.05em;
  vertical-align: top;
}

.company-table td {
  padding: 20px 28px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
}

.company-philosophy {
  padding: 80px 0;
  background: var(--gray-100);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.philosophy-card {
  background: var(--white);
  border-radius: 12px;
  padding: 36px 28px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--gray-200);
}

.philosophy-number {
  font-size: 40px;
  font-weight: 800;
  color: var(--gray-200);
  line-height: 1;
  margin-bottom: 8px;
}

.philosophy-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 12px;
}

.philosophy-card p {
  font-size: 14px;
  color: var(--gray-700);
  line-height: 1.8;
}

/* ===========================
   事業内容ページ
   =========================== */
.business-section {
  padding: 80px 0;
}

.business-detail {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 56px;
  align-items: start;
  padding: 64px 0;
  border-bottom: 1px solid var(--gray-200);
}

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

.business-detail-num {
  font-size: 80px;
  font-weight: 800;
  color: var(--gray-200);
  line-height: 0.9;
}

.business-detail-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.business-detail h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 20px;
}

.business-detail p {
  color: var(--gray-700);
  line-height: 1.9;
  margin-bottom: 24px;
}

.service-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.service-list li {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--navy);
  font-weight: 500;
}

/* ===========================
   お問い合わせページ
   =========================== */
.contact-section {
  padding: 80px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 56px;
}

.contact-info h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy-dark);
  margin-bottom: 20px;
}

.contact-info p {
  color: var(--gray-700);
  font-size: 14px;
  line-height: 1.9;
  margin-bottom: 16px;
}

.contact-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.contact-item-icon {
  width: 40px;
  height: 40px;
  background: var(--navy);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.contact-item-text {
  padding-top: 2px;
}

.contact-item-text strong {
  display: block;
  font-size: 12px;
  color: var(--gray-400);
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.contact-item-text span {
  font-size: 14px;
  color: var(--text);
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 48px 40px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.form-group label .required {
  color: #e53e3e;
  margin-left: 4px;
  font-weight: 400;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text);
  background: var(--gray-100);
  transition: border-color 0.2s, background 0.2s;
  outline: none;
  font-family: inherit;
}

.form-control:focus {
  border-color: var(--accent);
  background: var(--white);
}

textarea.form-control {
  resize: vertical;
  min-height: 160px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: background 0.2s, transform 0.2s;
}

.form-submit:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
}

.form-note {
  margin-top: 16px;
  font-size: 12px;
  color: var(--gray-400);
  text-align: center;
}

.form-success {
  display: none;
  background: #ebf8f0;
  border: 1px solid #68d391;
  border-radius: 8px;
  padding: 20px 24px;
  color: #276749;
  font-size: 15px;
  margin-top: 24px;
}

/* ===========================
   公告ページ
   =========================== */
.kokoku-section {
  padding: 80px 0;
}

.kokoku-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  padding: 48px 56px;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
}

.kokoku-card h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy-dark);
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--navy);
}

.kokoku-item {
  margin-bottom: 32px;
}

.kokoku-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.kokoku-item h3::before {
  content: '';
  display: block;
  width: 4px;
  height: 16px;
  background: var(--accent);
  border-radius: 2px;
}

.kokoku-item p {
  color: var(--gray-700);
  line-height: 1.9;
  font-size: 14px;
}

.kokoku-date {
  font-size: 13px;
  color: var(--gray-400);
  text-align: right;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-200);
}

.kokoku-notice {
  background: var(--gray-100);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 32px;
  font-size: 13px;
  color: var(--gray-700);
  line-height: 1.8;
  border-left: 3px solid var(--accent);
}

/* ===========================
   フッター
   =========================== */
footer {
  background: var(--navy-dark);
  color: rgba(255, 255, 255, 0.6);
  padding: 64px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
}

.footer-nav h4 {
  font-size: 12px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-nav ul {
  list-style: none;
}

.footer-nav ul li {
  margin-bottom: 10px;
}

.footer-nav ul a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}

.footer-nav ul a:hover {
  color: rgba(255, 255, 255, 0.9);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
}

/* ===========================
   ユーティリティ
   =========================== */
.divider {
  height: 1px;
  background: var(--gray-200);
  margin: 0;
}

/* ===========================
   レスポンシブ
   =========================== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-preview-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  header {
    padding: 0 20px;
  }

  nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: 80px 0 72px;
  }

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

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

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

  .business-detail {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .business-detail-num {
    font-size: 48px;
  }

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

  .contact-form {
    padding: 32px 24px;
  }

  .company-table th {
    width: 120px;
    padding: 16px 16px;
    font-size: 12px;
  }

  .company-table td {
    padding: 16px 16px;
    font-size: 14px;
  }

  .kokoku-card {
    padding: 32px 24px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }
}