/* ==========================================================
   バランスワン AIエージェント導入支援サービス
   白ベース × ネイビー・ブルー・淡いグレー / 軽量・レスポンシブ
   ========================================================== */

:root {
  --navy: #1b2a4a;
  --navy-dark: #131f38;
  --blue: #2266b3;
  --blue-light: #eaf1f8;
  --gray-50: #f7f8fa;
  --gray-100: #eef0f3;
  --gray-300: #d5d9e0;
  --text: #2a3342;
  --text-sub: #5a6474;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(27, 42, 74, 0.08);
  --font-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic Medium", "Yu Gothic", "Meiryo", sans-serif;
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho", serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.9;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
ul, ol { list-style: none; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------- ボタン ---------- */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 1rem;
  text-align: center;
  transition: opacity 0.2s, transform 0.2s;
  cursor: pointer;
  border: none;
}
.btn:hover { opacity: 0.85; transform: translateY(-1px); }
.btn-primary { background: var(--navy); color: var(--white); }
.btn-secondary { background: var(--blue); color: var(--white); }
.btn-outline { background: transparent; color: var(--navy); border: 2px solid var(--navy); }
.btn-outline-white { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.7); }
.btn-sm { padding: 10px 22px; font-size: 0.9rem; }
.btn-lg { padding: 17px 44px; font-size: 1.05rem; }
.btn-full { display: block; width: 100%; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--gray-100);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}
.logo { display: flex; flex-direction: column; line-height: 1.3; }
.logo-en { font-family: var(--font-serif); font-size: 1.15rem; font-weight: 700; color: var(--navy); letter-spacing: 0.06em; }
.logo-ja { font-size: 0.68rem; color: var(--text-sub); letter-spacing: 0.08em; }
.site-nav { display: flex; gap: 26px; }
.site-nav a { color: var(--text); font-size: 0.92rem; font-weight: 500; }
.site-nav a:hover, .site-nav a.current { color: var(--blue); }
.header-cta { display: flex; align-items: center; gap: 12px; }

.hamburger {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.hamburger span { display: block; width: 22px; height: 2px; background: var(--navy); transition: transform 0.25s, opacity 0.25s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none;
  background: var(--white);
  border-bottom: 1px solid var(--gray-100);
  padding: 12px 20px 20px;
}
.mobile-nav.open { display: block; }
.mobile-nav a { display: block; padding: 12px 4px; color: var(--text); font-weight: 500; border-bottom: 1px solid var(--gray-100); }
.mobile-nav .btn { margin-top: 16px; border-bottom: none; color: var(--white); }

/* ---------- パンくず ---------- */
.breadcrumb { background: var(--gray-50); padding: 10px 0; font-size: 0.8rem; }
.breadcrumb ol { display: flex; gap: 8px; flex-wrap: wrap; }
.breadcrumb li + li::before { content: "›"; margin-right: 8px; color: var(--gray-300); }
.breadcrumb li { color: var(--text-sub); }

/* ---------- ヒーロー（トップ） ---------- */
.hero {
  background: linear-gradient(160deg, var(--white) 0%, var(--blue-light) 100%);
  padding: 72px 0 64px;
}
.hero-badge {
  display: inline-block;
  background: var(--navy);
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 999px;
  letter-spacing: 0.05em;
  margin-bottom: 24px;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.7rem, 4.6vw, 2.7rem);
  color: var(--navy);
  line-height: 1.55;
  letter-spacing: 0.03em;
  margin-bottom: 24px;
}
.hero h1 em { font-style: normal; color: var(--blue); }
.hero-sub { color: var(--text-sub); font-size: 1.02rem; max-width: 640px; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }
.hero-assure { font-size: 0.85rem; color: var(--text-sub); }

/* ---------- ページヒーロー（下層） ---------- */
.page-hero {
  background: linear-gradient(160deg, var(--navy) 0%, #23385f 100%);
  color: var(--white);
  padding: 56px 0;
}
.page-hero .label { color: #9db8dc; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase; }
.page-hero h1 { font-family: var(--font-serif); font-size: clamp(1.5rem, 3.6vw, 2.2rem); margin: 8px 0 14px; line-height: 1.5; }
.page-hero p { color: rgba(255,255,255,0.82); max-width: 720px; font-size: 0.95rem; }

/* ---------- セクション共通 ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--gray-50); }
.section-navy { background: var(--navy); color: var(--white); }
.section-title { text-align: center; margin-bottom: 44px; }
.section-title .label {
  display: inline-block;
  color: var(--blue);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}
.section-title h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  color: var(--navy);
  line-height: 1.6;
}
.section-navy .section-title h2 { color: var(--white); }
.section-title p { color: var(--text-sub); margin-top: 12px; font-size: 0.95rem; }
.section-navy .section-title p { color: rgba(255,255,255,0.75); }
.lead { max-width: 760px; margin: 0 auto 40px; color: var(--text-sub); text-align: center; }

/* ---------- カードグリッド ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow);
}
.card .icon { font-size: 1.9rem; margin-bottom: 12px; }
.card h3 { color: var(--navy); font-size: 1.08rem; margin-bottom: 10px; line-height: 1.5; }
.card p { color: var(--text-sub); font-size: 0.92rem; }

.problem-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  box-shadow: var(--shadow);
}
.problem-card .icon { font-size: 1.4rem; line-height: 1.4; }

/* ---------- ステップ ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.steps-5 { grid-template-columns: repeat(5, 1fr); }
.step-card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius);
  padding: 24px 18px;
  box-shadow: var(--shadow);
}
.step-num { color: var(--blue); font-weight: 700; font-size: 0.78rem; letter-spacing: 0.1em; }
.step-num strong { display: block; font-size: 1.7rem; font-family: var(--font-serif); color: var(--navy); line-height: 1.2; }
.step-card h3 { font-size: 0.98rem; color: var(--navy); margin: 10px 0 8px; line-height: 1.5; }
.step-card p { font-size: 0.85rem; color: var(--text-sub); }

/* ---------- 強調数字 ---------- */
.stat { text-align: center; }
.stat .num { font-family: var(--font-serif); font-size: 2rem; color: var(--navy); font-weight: 700; }
.stat .num small { font-size: 1rem; }
.stat .desc { font-size: 0.85rem; color: var(--text-sub); }

/* ---------- 料金カード ---------- */
.price-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.price-card {
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  padding: 32px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
}
.price-card.recommended { border: 2px solid var(--blue); }
.price-badge {
  position: absolute;
  top: -14px;
  left: 24px;
  background: var(--blue);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
}
.price-card .plan-name { font-size: 1.15rem; color: var(--navy); font-weight: 700; margin-bottom: 4px; }
.price-card .plan-for { font-size: 0.85rem; color: var(--blue); font-weight: 600; margin-bottom: 14px; }
.price-card .plan-price { font-family: var(--font-serif); font-size: 1.55rem; color: var(--navy); font-weight: 700; line-height: 1.4; }
.price-card .plan-price small { font-size: 0.85rem; font-family: var(--font-sans); color: var(--text-sub); font-weight: 400; }
.price-card .plan-cond { font-size: 0.8rem; color: var(--text-sub); margin: 6px 0 18px; }
.price-card ul { border-top: 1px solid var(--gray-100); padding-top: 16px; flex: 1; }
.price-card ul li { font-size: 0.88rem; padding: 5px 0 5px 22px; position: relative; color: var(--text); }
.price-card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--blue); font-weight: 700; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-category { font-family: var(--font-serif); color: var(--navy); font-size: 1.15rem; margin: 40px 0 16px; padding-left: 12px; border-left: 4px solid var(--blue); }
.faq-item { background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius); margin-bottom: 12px; overflow: hidden; }
.faq-q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
}
.faq-q .q-mark { color: var(--blue); font-family: var(--font-serif); font-size: 1.2rem; font-weight: 700; flex-shrink: 0; }
.faq-q .toggle { margin-left: auto; flex-shrink: 0; width: 22px; height: 22px; color: var(--blue); transition: transform 0.25s; }
.faq-item.open .toggle { transform: rotate(45deg); }
.faq-a { display: none; padding: 0 20px 18px 54px; color: var(--text-sub); font-size: 0.92rem; }
.faq-item.open .faq-a { display: block; }

/* ---------- 注記ボックス ---------- */
.note {
  background: var(--blue-light);
  border-left: 4px solid var(--blue);
  border-radius: 6px;
  padding: 16px 20px;
  font-size: 0.9rem;
  color: var(--text);
}

/* ---------- CTAセクション ---------- */
.cta-section { background: linear-gradient(160deg, var(--navy) 0%, var(--navy-dark) 100%); color: var(--white); padding: 72px 0; text-align: center; }
.cta-section h2 { font-family: var(--font-serif); font-size: clamp(1.3rem, 3vw, 1.7rem); line-height: 1.6; margin-bottom: 16px; }
.cta-section > .container > p { color: rgba(255,255,255,0.8); max-width: 640px; margin: 0 auto 24px; font-size: 0.95rem; }
.cta-assure {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  padding: 8px 24px;
  font-size: 0.85rem;
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.cta-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }
.cta-note { font-size: 0.82rem; color: rgba(255,255,255,0.6); }
.cta-section .btn-primary { background: var(--white); color: var(--navy); }

/* ---------- テーブル ---------- */
.table-wrap { overflow-x: auto; }
table.compare { width: 100%; border-collapse: collapse; font-size: 0.88rem; background: var(--white); }
table.compare th, table.compare td { border: 1px solid var(--gray-100); padding: 12px 14px; text-align: left; vertical-align: top; }
table.compare th { background: var(--gray-50); color: var(--navy); white-space: nowrap; }

/* ---------- フォーム ---------- */
.form-wrap { max-width: 640px; margin: 0 auto; }
.form-note { background: var(--blue-light); border-radius: var(--radius); padding: 20px 24px; font-size: 0.9rem; margin-bottom: 32px; }
.form-group { margin-bottom: 22px; }
.form-group label { display: block; font-weight: 600; font-size: 0.92rem; margin-bottom: 6px; color: var(--navy); }
.form-group .req { color: #c0392b; font-size: 0.75rem; margin-left: 6px; }
.form-group .opt { color: var(--text-sub); font-size: 0.75rem; margin-left: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  background: var(--white);
  color: var(--text);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: 2px solid var(--blue); border-color: var(--blue); }
.form-group textarea { min-height: 140px; resize: vertical; }

/* ---------- フッター ---------- */
.site-footer { background: var(--navy-dark); color: rgba(255,255,255,0.75); padding: 56px 0 0; font-size: 0.88rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 36px; padding-bottom: 40px; }
.site-footer .logo-en { color: var(--white); }
.site-footer .logo-ja { color: rgba(255,255,255,0.6); }
.site-footer h4 { color: var(--white); font-size: 0.9rem; margin-bottom: 14px; letter-spacing: 0.05em; }
.site-footer ul li { margin-bottom: 8px; }
.site-footer a { color: rgba(255,255,255,0.65); }
.site-footer a:hover { color: var(--white); }
.footer-address { font-style: normal; font-size: 0.82rem; line-height: 1.9; margin-top: 14px; color: rgba(255,255,255,0.55); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding: 18px 0; text-align: center; font-size: 0.78rem; color: rgba(255,255,255,0.45); }

/* ---------- スマホ追従CTAバー ---------- */
.sticky-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(6px);
  border-top: 1px solid var(--gray-100);
}
.sticky-cta .btn { width: 100%; }

/* ---------- スクロール表示アニメーション ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- レスポンシブ ---------- */
@media (max-width: 900px) {
  .site-nav { display: none; }
  .hamburger { display: flex; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps, .steps-5 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  body { font-size: 15px; }
  .section { padding: 52px 0; }
  .hero { padding: 52px 0 44px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .steps, .steps-5 { grid-template-columns: 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-cta .btn, .cta-group .btn { width: 100%; }
  .sticky-cta { display: block; }
  body { padding-bottom: 70px; }
  .header-cta .btn { display: none; }
}