/* ===========================
   Reset
=========================== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===========================
   Global Typography / Body
   （co.jp に合わせたフォント＆余白）
=========================== */
:root {
  --container: 1100px;
  --ink: #111;
  --muted: #555;
  --bg-page: #f5f5f7;
  --bg-card: #fafafa;
  --border-soft: #e5e7eb;
  --accent: #b00020;   /* JP Desk = 赤系 */
  --link: #0055d4;
}

html {
  font-size: 16px;
}

body {
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    "Helvetica Neue",
    Helvetica,
    Arial,
    "Segoe UI",
    "Noto Sans",
    "Noto Sans JP",
    "Noto Sans TC",
    sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: 0.15px;
  color: var(--ink);
  background: var(--bg-page);
}

/* Link */
a {
  color: var(--link);
  text-decoration: none;
  transition: opacity .2s ease, color .2s ease;
}

a:hover {
  opacity: 0.8;
}

/* Utility container */
.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 16px;
}

/* Generic main wrapper（白い紙の上に本文） */
main {
  max-width: var(--container);
  margin: 0 auto;
  background: #fff;
}

/* Basic headings & text（co.jp に近い余白） */
h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--ink);
}

h1 {
  font-size: 1.8rem;
  margin: 0 0 16px;
  line-height: 1.4;
}

h2 {
  font-size: 1.4rem;
  margin: 0 0 14px;
  line-height: 1.5;
}

h3 {
  font-size: 1.2rem;
  margin: 0 0 12px;
  line-height: 1.5;
}

p {
  margin: 14px 0 20px;
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
}

ul, ol {
  margin: 10px 0 20px 1.4rem;
  padding: 0;
  color: var(--muted);
}

li {
  margin: 6px 0;
}

/* 共通 section 余白（co.jp っぽく広めに） */
section {
  padding: 32px 16px;
}

@media (max-width: 900px) {
  section {
    padding: 24px 12px;
  }
}

/* ===========================
   Header（header-en/zh.html 共通）
=========================== */
.site-header {
  width: 100%;
  background: #fff;
  border-bottom: 1px solid rgba(0,0,0,0.08);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 16px;
}

/* header-en.html / header-zh.html 内の .header-flex にも効くように */
.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo img {
  display: block;
  height: 44px;
}

/* ナビゲーション */
.main-nav ul {
  display: flex;
  align-items: center;
  gap: 18px;
  list-style: none;
}

.main-nav a {
  font-size: 0.95rem;
    /* 日本語・英語どちらも太すぎない程度に */
  font-weight: 500;
  color: #222;
  text-decoration: none;
}

.main-nav a:hover {
  color: var(--accent);
  opacity: 1;
}

/* Lang switch が右端に来る場合の余白 */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
}

.nav-lang {
  display: inline-flex;
  gap: 6px;
}

.nav-lang a {
  color: #666;
}

.nav-lang a.active {
  color: var(--accent);
  font-weight: 600;
}

/* モバイル時はヘッダー余白を少し詰める */
@media (max-width: 900px) {
  .site-header .wrap {
    padding: 8px 10px;
  }
  .logo img {
    height: 40px;
  }
  .main-nav ul {
    gap: 12px;
    font-size: 0.9rem;
  }
}

/* ===========================
   Hero（シンプルな画像 / 動画用）
   ※ index.html や about.html 側の個別CSSが優先される
=========================== */
.hero {
  position: relative;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 16px;
}

.hero img,
.hero video {
  width: 100%;
  border-radius: 12px;
  display: block;
}

/* ===========================
   Card / Grid 共通
=========================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 16px;
}

.card {
  background: var(--bg-card);
  border-radius: 12px;
  border: 1px solid var(--border-soft);
  padding: 18px 18px 20px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.02);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 4px 0 0;
  font-size: 0.95rem;
}

/* 旧 three-cols 用の互換スタイル */
.three-cols {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

/* 共通ボタン */
.btn,
.contact-btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
}

.btn:hover,
.contact-btn:hover {
  opacity: 0.9;
}

/* ===========================
   Footer 共通
=========================== */
.site-footer {
  width: 100%;
  background: #111;
  color: #fff;
  margin-top: 48px;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 40px 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

.footer-company {
  font-size: 1rem;
  font-weight: 700;
}

.footer-copy {
  margin-top: 6px;
  font-size: 0.85rem;
  color: #ccc;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.9rem;
}

.footer-links a {
  color: #fff;
  text-decoration: none;
}

.footer-links a:hover {
  opacity: 0.8;
}

/* フッターの下部コピーだけセンターにしたい場合に使用 */
.footer-bottom {
  text-align: center;
  font-size: 0.8rem;
  color: #aaa;
  padding-top: 8px;
}

/* ===========================
   Responsive
=========================== */
@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    padding: 24px 16px 18px;
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ======================================
   Common Hero (全ページ共通レイアウト)
   ※ hero-wrap 内だけに適用（TOPの .hero には干渉しない）
   ====================================== */
.hero-wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:16px 16px 0;
}

/* 共通Heroは「.hero-wrap の中の .hero」だけ */
.hero-wrap .hero{
  position:relative;
  border-radius:12px;
  overflow:hidden;
  height:260px;
  background-size:cover;
  background-position:center;
}

/* 白オーバーレイ */
.hero-wrap .hero::before{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(
    to bottom,
    rgba(255,255,255,0.60),
    rgba(255,255,255,0.25)
  );
  z-index:1;
}

/* 白帯（黒文字） */
.hero-wrap .hero-inner{
  position:absolute;
  left:4%;
  bottom:8%;
  background:rgba(255,255,255,0.85);
  color:#222;
  padding:18px 20px;
  border-radius:10px;
  max-width:72%;
  backdrop-filter:blur(3px);
  z-index:2;
}

.hero-wrap .hero-inner h1{
  margin:0 0 6px;
  font-size:1.8rem;
}

.hero-wrap .hero-inner p{
  margin:0;
  font-size:1rem;
  line-height:1.6;
}

@media(max-width:900px){
  .hero-wrap .hero{
    height:190px;
  }
  .hero-wrap .hero-inner{
    left:5%;
    right:5%;
    bottom:8%;
    max-width:100%;
    padding:14px 16px;
  }
  .hero-wrap .hero-inner h1{
    font-size:1.55rem;
  }
  .hero-wrap .hero-inner p{
    font-size:.95rem;
  }
}

/* ===== Hero 画像の割り当て ===== */

/* 会社概要 / About / Company Profile */
.hero--about{
  background-image:url("images/profile.png");
}

/* ビジネス / Trading / Business Activities */
.hero--trading{
  background-image:url("images/trading.png");
}

/* Services */
.hero--service{
  background-image:url("images/service.jpg");
}

/* Group Network */
.hero--network{
  background-image:url("images/network.jpg");
}

/* Strength / Our Strengths */
.hero--strength{
  background-image:url("images/strength.png");
}

/* Management Message */
.hero--management{
  background-image:url("images/management.jpg");
}

/* Future / Future Plans */
.hero--future{
  background-image:url("images/future.png");
}

/* Governance */
.hero--gov{
  background-image:url("images/gov.png");
}

/* Risk Management */
.hero--risk{
  background-image:url("images/risk.png");
}

/* Compliance */
.hero--compliance{
  background-image:url("images/compliance.png");
}

/* Sustainability */
.hero--sustainability{
  background-image:url("images/sustainability.png");
}