/* ==========================================================================
   Masato Co., Ltd. Corporate Site
   Color: Navy #1a2744, Gold #c8a45c, White #fff, Light #f8f9fa
   ========================================================================== */

/* Google Fonts loaded via <link> in header.htm */

/* --- Variables --- */
:root {
  --navy: #1a2744;
  --navy-light: #243352;
  --gold: #c8a45c;
  --gold-light: #ddc48a;
  --white: #ffffff;
  --light: #f8f9fa;
  --gray: #6c757d;
  --dark: #212529;
  --text-secondary: #444;
  --text-muted: #555;
  --text-light: #666;
  --border: #dee2e6;
  --max-w: 1220px;
  --font-ja: 'Noto Sans JP', 'Hiragino Kaku Gothic Pro', 'Yu Gothic', sans-serif;
  --font-zh: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,.08);
  --transition: .3s ease;
}

/* --- Reset overrides --- */
.m, .m0, .head, .head_m, .head_l, .head_r, .head_s,
#mfixon, .blue1, .menu, .main-nav, .logo,
.idx-hero, .in_bt, .ser_9, .m9, .ser, .ser_0, .ser_1, .ser_2, .pri,
.idx-bottom-bar { display: none !important; }

/* --- Base --- */
html { height: 100%; }
body {
  font-family: var(--font-ja);
  color: var(--dark);
  background: var(--white);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
#main-content { flex: 1; }
html[lang="zh"] body,
html[lang="zh-CN"] body { font-family: var(--font-zh); }

*, *::before, *::after { box-sizing: border-box; }
img { max-width: 100%; height: auto; }
a { color: var(--navy); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--gold); }

/* --- Skip Link --- */
.ms-skip-link {
  position: absolute; left: -9999px; top: auto;
  z-index: 2000; padding: 8px 16px;
  background: var(--navy); color: var(--white);
  font-size: 14px; border-radius: var(--radius);
}
.ms-skip-link:focus { left: 8px; top: 8px; }

/* --- Container --- */
.ms-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* === HEADER === */
.ms-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.ms-header.is-scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.1); }

.ms-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.ms-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
}
.ms-logo-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: .05em;
  line-height: 1.2;
}
.ms-logo-sub {
  font-size: 11px;
  color: var(--gray);
  letter-spacing: .08em;
}

.ms-nav { display: flex; align-items: center; gap: 4px; }
.ms-nav a {
  padding: 8px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--navy);
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.ms-nav a:hover,
.ms-nav a.is-active {
  background: var(--navy);
  color: var(--white);
}

.ms-lang {
  display: flex;
  gap: 2px;
  margin-left: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.ms-lang button {
  border: none;
  background: var(--white);
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  color: var(--gray);
  transition: all var(--transition);
}
.ms-lang button:hover { background: var(--light); color: var(--navy); }
.ms-lang button.is-active { background: var(--navy); color: var(--white); }

/* Hamburger */
.ms-hamburger {
  display: none;
  background: none; border: none; cursor: pointer;
  width: 40px; height: 40px;
  position: relative;
}
.ms-hamburger span,
.ms-hamburger span::before,
.ms-hamburger span::after {
  display: block;
  width: 22px; height: 2px;
  background: var(--navy);
  position: absolute;
  left: 9px;
  transition: all var(--transition);
}
.ms-hamburger span { top: 19px; }
.ms-hamburger span::before { content: ''; top: -7px; }
.ms-hamburger span::after { content: ''; top: 7px; }
.ms-hamburger.is-open span { background: transparent; }
.ms-hamburger.is-open span::before { top: 0; transform: rotate(45deg); }
.ms-hamburger.is-open span::after { top: 0; transform: rotate(-45deg); }

/* Header spacer */
.ms-header-spacer { height: 72px; }

/* === HERO === */
.ms-hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 100px 24px 80px;
  text-align: center;
}
.ms-hero-name {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: 8px;
}
.ms-hero-eng {
  font-size: 14px;
  color: var(--gold-light);
  letter-spacing: .15em;
  margin-bottom: 32px;
}
.ms-hero-slogan {
  font-size: 20px;
  font-weight: 500;
  line-height: 1.7;
  max-width: var(--max-w);
  margin: 0 auto 24px;
}
.ms-hero-desc {
  font-size: 14px;
  color: rgba(255,255,255,.75);
  max-width: var(--max-w);
  margin: 0 auto;
  line-height: 1.9;
}
.ms-hero-gold { color: var(--gold); }

/* === SECTIONS === */
.ms-section {
  padding: 72px 24px;
}
.ms-section--alt {
  background: var(--light);
}
.ms-section-header {
  text-align: center;
  margin-bottom: 48px;
}
.ms-section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.ms-section-sub {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .2em;
  text-transform: uppercase;
}
.ms-section-divider {
  width: 48px;
  height: 3px;
  background: var(--gold);
  border: none;
  margin: 16px auto 0;
}

/* === COMPANY INTRO === */
.ms-intro-text {
  max-width: var(--max-w);
  margin: 0 auto;
  text-align: center;
  font-size: 15px;
  line-height: 2;
  color: var(--dark);
}

/* === CEO MESSAGE === */
.ms-ceo {
  max-width: var(--max-w);
  margin: 0 auto;
}
.ms-ceo-text {
  font-size: 14.5px;
  line-height: 2;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.ms-ceo-sign {
  text-align: right;
  font-size: 14px;
  color: var(--navy);
  font-weight: 500;
}

/* === OVERVIEW TABLE === */
.ms-overview-table {
  max-width: var(--max-w);
  margin: 0 auto;
  border-collapse: collapse;
  width: 100%;
}
.ms-overview-table th,
.ms-overview-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
  text-align: left;
  vertical-align: top;
}
.ms-overview-table th {
  width: 140px;
  font-weight: 600;
  color: var(--navy);
  background: var(--light);
  white-space: nowrap;
}

/* === SERVICE CARDS === */
.ms-services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.ms-service-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.ms-service-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.ms-service-num {
  display: inline-block;
  width: 32px; height: 32px;
  line-height: 32px;
  text-align: center;
  background: var(--navy);
  color: var(--gold);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.ms-service-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}
.ms-service-desc {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.ms-service-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.ms-service-list li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 3px 0 3px 16px;
  position: relative;
}
.ms-service-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 6px;
  background: var(--gold);
  border-radius: 50%;
}

/* === STRENGTHS === */
.ms-strengths-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.ms-strength-card {
  text-align: center;
  padding: 36px 20px;
}
.ms-strength-icon {
  width: 64px; height: 64px;
  background: var(--navy);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.ms-strength-icon svg {
  width: 28px; height: 28px;
  stroke: var(--gold);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.ms-strength-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}
.ms-strength-text {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* === GROUP COMPANIES === */
.ms-group-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: var(--max-w);
  margin: 0 auto;
}
.ms-group-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--white);
}
.ms-group-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.ms-group-loc {
  font-size: 13px;
  color: var(--gray);
  margin-bottom: 14px;
}
.ms-group-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.ms-group-list li {
  font-size: 13px;
  color: var(--text-muted);
  padding: 3px 0 3px 16px;
  position: relative;
}
.ms-group-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 11px;
  width: 6px; height: 6px;
  background: var(--gold);
  border-radius: 50%;
}

/* === TRACK RECORD === */
.ms-record-list {
  max-width: var(--max-w);
  margin: 0 auto;
  list-style: none;
  padding: 0;
}
.ms-record-list li {
  padding: 10px 0 10px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  position: relative;
}
.ms-record-list li::before {
  content: '';
  position: absolute;
  left: 0; top: 18px;
  width: 8px; height: 8px;
  background: var(--gold);
  border-radius: 50%;
}

/* === SERVICE FLOW === */
.ms-flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto;
}
.ms-flow-step {
  flex: 1;
  text-align: center;
  padding: 0 12px;
}
.ms-flow-num {
  width: 48px; height: 48px;
  line-height: 48px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--gold);
  font-size: 18px;
  font-weight: 700;
  margin: 0 auto 14px;
}
.ms-flow-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}
.ms-flow-desc {
  font-size: 12.5px;
  color: var(--text-light);
  line-height: 1.6;
}
.ms-flow-arrow {
  display: flex;
  align-items: center;
  padding-top: 12px;
  color: var(--gold);
  font-size: 20px;
  flex-shrink: 0;
}

/* === CONTACT === */
.ms-contact-form {
  max-width: var(--max-w);
  margin: 0 auto;
}
.ms-form-group {
  margin-bottom: 20px;
}
.ms-form-label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}
.ms-form-label .required {
  color: #dc3545;
  margin-left: 4px;
  font-size: 12px;
}
.ms-form-input,
.ms-form-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition);
}
.ms-form-input:focus,
.ms-form-textarea:focus {
  outline: 2px solid var(--navy);
  outline-offset: 1px;
  border-color: var(--navy);
}
.ms-form-textarea { height: 140px; resize: vertical; }
.ms-form-submit {
  display: inline-block;
  background: var(--navy);
  color: var(--white);
  border: none;
  padding: 12px 48px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition);
}
.ms-form-submit:hover { background: var(--gold); }

/* === FOOTER === */
.ms-footer {
  background: var(--navy);
  color: rgba(255,255,255,.8);
  padding: 48px 24px 24px;
}
.ms-footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 48px;
}
.ms-footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}
.ms-footer-info {
  font-size: 13px;
  line-height: 2;
}
.ms-footer-info a { color: var(--gold-light); }
.ms-footer-copy {
  text-align: center;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.15);
  font-size: 12px;
  color: rgba(255,255,255,.5);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .ms-strengths-grid { grid-template-columns: repeat(2, 1fr); }
  .ms-nav a { padding: 8px 10px; font-size: 12.5px; }
}

@media (max-width: 768px) {
  .ms-nav { display: none; }
  .ms-lang { display: none; }
  .ms-hamburger { display: block; }

  /* Mobile menu */
  .ms-mobile-menu {
    display: none;
    position: fixed;
    top: 72px; left: 0; right: 0; bottom: 0;
    background: var(--white);
    z-index: 999;
    padding: 24px;
    overflow-y: auto;
  }
  .ms-mobile-menu.is-open { display: block; }
  .ms-mobile-menu a {
    display: block;
    padding: 14px 0;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
    color: var(--navy);
  }
  .ms-mobile-lang {
    display: flex;
    gap: 8px;
    margin-top: 20px;
  }
  .ms-mobile-lang button {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--white);
    font-size: 13px;
    cursor: pointer;
  }
  .ms-mobile-lang button.is-active {
    background: var(--navy);
    color: var(--white);
    border-color: var(--navy);
  }

  .ms-hero { padding: 64px 20px 56px; }
  .ms-hero-name { font-size: 24px; }
  .ms-hero-slogan { font-size: 16px; }
  .ms-section { padding: 48px 16px; }
  .ms-services-grid { grid-template-columns: 1fr; }
  .ms-strengths-grid { grid-template-columns: 1fr; }
  .ms-group-grid { grid-template-columns: 1fr; }
  .ms-flow { flex-direction: column; align-items: center; gap: 8px; }
  .ms-flow-arrow { transform: rotate(90deg); padding: 0; }
  .ms-footer-inner { flex-direction: column; gap: 24px; }
  .ms-overview-table tr { display: flex; flex-direction: column; }
  .ms-overview-table th { width: 100%; }
}

/* === CASE STUDIES === */
.ms-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.ms-case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: box-shadow var(--transition), border-color var(--transition);
}
.ms-case-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--gold-light);
}
.ms-case-tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--navy);
  color: var(--white);
  font-size: 12px;
  font-weight: 500;
  border-radius: 3px;
  letter-spacing: .5px;
  margin-bottom: 14px;
}
.ms-case-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
  margin: 0 0 12px;
}
.ms-case-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 16px;
}
.ms-case-result {
  font-size: 13px;
  line-height: 1.6;
  color: var(--gold);
  font-weight: 500;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
  .ms-cases-grid { grid-template-columns: 1fr; }
}

/* === BREADCRUMB === */
.ms-breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--subtle);
}
.ms-breadcrumb a {
  color: var(--subtle);
  text-decoration: none;
  transition: color .2s;
}
.ms-breadcrumb a:hover { color: var(--gold); }
.ms-breadcrumb-sep { color: var(--border); }

/* === NEWS CATEGORY === */
.ms-news-categories {
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.ms-news-category {}
.ms-news-cat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--navy);
}
.ms-news-cat-header h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
}
.ms-news-more {
  font-size: 14px;
  color: var(--subtle);
  text-decoration: none;
  transition: color .2s;
}
.ms-news-more:hover { color: var(--gold); }

/* === ARTICLE DETAIL === */
.ms-article {
  max-width: 800px;
  margin: 0 auto;
}
.ms-article-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--navy);
  margin: 0 0 16px;
}
.ms-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 14px;
  color: var(--subtle);
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.ms-article-intro {
  background: rgba(26,39,68,.04);
  border-left: 3px solid var(--gold);
  padding: 16px 20px;
  margin-bottom: 32px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}
.ms-article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 32px;
}
.ms-article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}
.ms-article-content p { margin: 0 0 16px; }
.ms-article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}
.ms-article-tags a {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(26,39,68,.06);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  transition: all .2s;
}
.ms-article-tags a:hover {
  background: var(--navy);
  color: var(--white);
}
.ms-article-actions {
  display: flex;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.ms-btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: all .2s;
}
.ms-btn-action:hover {
  border-color: var(--navy);
  color: var(--navy);
}

@media (max-width: 768px) {
  .ms-article-title { font-size: 22px; }
  .ms-article-actions { flex-wrap: wrap; }
}

/* === NEWS LIST === */
.ms-news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.ms-news-item {
  display: flex;
  align-items: baseline;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  transition: background .2s;
}
.ms-news-item:first-child {
  border-top: 1px solid var(--border);
}
.ms-news-item:hover {
  background: rgba(26,39,68,.03);
}
.ms-news-date {
  flex-shrink: 0;
  font-family: 'Geist Mono', 'Noto Sans JP', monospace;
  font-size: 14px;
  color: var(--subtle);
  min-width: 100px;
}
.ms-news-title {
  font-size: 16px;
  line-height: 1.6;
}
.ms-news-item:hover .ms-news-title {
  color: var(--gold);
}
.ms-news-empty {
  text-align: center;
  padding: 64px 0;
  color: var(--subtle);
  font-size: 15px;
}
.ms-pages {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 32px;
  padding: 16px 0;
}
.ms-pages a, .ms-pages span {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: all .2s;
}
.ms-pages a:hover {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}
.ms-pages .current, .ms-pages span.current {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

@media (max-width: 768px) {
  .ms-news-item {
    flex-direction: column;
    gap: 4px;
    padding: 14px 0;
  }
  .ms-news-date { min-width: unset; }
}

/* === LANGUAGE DISPLAY === */
[data-lang-ja], [data-lang-en], [data-lang-zh] { display: none; }
html[data-lang="ja"] [data-lang-ja] { display: inline; }
html[data-lang="en"] [data-lang-en] { display: inline; }
html[data-lang="zh"] [data-lang-zh] { display: inline; }
html[data-lang="ja"] [data-lang-ja].ms-block { display: block; }
html[data-lang="en"] [data-lang-en].ms-block { display: block; }
html[data-lang="zh"] [data-lang-zh].ms-block { display: block; }