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

:root {
  --orange: #F26522;
  --orange-dark: #D85510;
  --teal: #00B4C8;
  --teal-dark: #0090A0;
  --navy: #1A2E4A;
  --navy-mid: #243C5A;
  --body-text: #334155;
  --light-bg: #F0F8FA;
  --white: #FFFFFF;
  --card-shadow: 0 4px 24px rgba(0,80,100,0.09);
}

body {
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--body-text);
  background: var(--white);
  line-height: 1.7;
}


/* ─── NAV ─── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #e2ecf0;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 40px; height: 64px;
}
.nav-logo img { height: 36px; }
.nav-right { display: flex; align-items: center; gap: 20px; }
.nav-login { color: var(--navy); font-size: 14px; font-weight: 500; text-decoration: none; }
.btn {
  padding: 10px 22px; border-radius: 8px; font-size: 14px; font-weight: 700;
  cursor: pointer; text-decoration: none; transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 6px;
}
.btn-orange { background: var(--orange); color: #fff; border: none; }
.btn-orange:hover { background: var(--orange-dark); }
.btn-outline { background: transparent; color: var(--navy); border: 2px solid var(--navy); }
.btn-outline:hover { background: var(--navy); color: #fff; }


/* ─── HERO ─── */
@keyframes moti-float {
  0%   { transform: translateY(0px) rotate(-2deg); }
  50%  { transform: translateY(-18px) rotate(2deg); }
  100% { transform: translateY(0px) rotate(-2deg); }
}
.hero {
  background: linear-gradient(to bottom, #ffffff 0%, #e8f6fa 15%, #c8edf5 50%, #6aafc8 80%, #1A2E4A 100%);
  padding: 90px 24px 80px;
}
.hero-inner {
  display: flex; align-items: center; justify-content: center;
  gap: 48px; max-width: 1080px; margin: 0 auto; padding: 0 24px;
}
.hero-text { text-align: center; flex: 1; min-width: 0; }
.hero-moti {
  flex-shrink: 0; width: 220px;
  animation: moti-float 3.6s ease-in-out infinite;
  filter: drop-shadow(0 12px 24px rgba(0,80,120,0.18));
}
@media (max-width: 480px) {
  .hero-inner { flex-direction: column; gap: 24px; }
  .hero-moti { width: 140px; }
}
.hero-badge {
  display: inline-block; background: rgba(0,180,200,0.15);
  color: var(--teal-dark); border: 1px solid var(--teal);
  border-radius: 100px; padding: 5px 16px; font-size: 13px; font-weight: 600;
  margin-bottom: 24px; letter-spacing: 0.05em;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900; color: var(--navy);
  line-height: 1.3; max-width: 820px; margin: 0 auto 20px;
}
.hero h1 .highlight { color: var(--teal); }
.hero-sub {
  font-size: clamp(15px, 2vw, 18px); color: #4a6070;
  max-width: 620px; margin: 0 auto 36px; line-height: 1.8;
}
.btn-row { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-social-proof {
  margin: 48px auto 0; max-width: 820px;
  padding-top: 28px; border-top: 1px solid rgba(0,100,130,0.15);
}
.social-proof-label {
  font-size: 11px; font-weight: 700; color: #7090a0;
  letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 14px;
}
.social-proof-body {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; flex-wrap: wrap;
}
.logo-tag {
  background: rgba(255,255,255,0.7); border: 1px solid #c8dce3;
  border-radius: 6px; padding: 6px 16px; font-size: 13px;
  font-weight: 700; color: var(--navy-mid);
}
.cases-link {
  font-size: 13px; font-weight: 700; color: var(--teal-dark);
  text-decoration: none; white-space: nowrap;
  padding-left: 14px; border-left: 1px solid #c8dce3;
  transition: color 0.2s;
}
.cases-link:hover { color: var(--teal); }


/* ─── STORY ARC ─── */
.story-arc { background: var(--navy); padding: 72px 24px; }
.story-arc .section-label {
  color: var(--teal); font-size: 12px; letter-spacing: 0.15em;
  font-weight: 700; text-align: center; margin-bottom: 12px;
}
.story-arc h2 {
  text-align: center; font-size: clamp(22px, 3.5vw, 36px);
  font-weight: 900; color: #fff;
  max-width: 1000px; margin: 0 auto 48px;
}
.story-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px; max-width: 1000px; margin: 0 auto;
}
.dark-glass { background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.12); }
.story-card { border-radius: 16px; padding: 32px 26px; transition: transform 0.2s, background 0.2s; }
.story-card:hover { background: rgba(255,255,255,0.12); transform: translateY(-3px); }
.story-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(0,180,200,0.2); border: 1px solid rgba(0,180,200,0.35);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.story-icon .material-icons { font-size: 26px; color: var(--teal); }
.story-label { font-size: 11px; font-weight: 700; color: var(--teal); letter-spacing: 0.12em; margin-bottom: 8px; text-transform: uppercase; }
.story-card h3 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.story-card p { font-size: 13.5px; color: rgba(255,255,255,0.72); line-height: 1.8; }
.story-result {
  max-width: 1000px; margin: 28px auto 0;
  background: rgba(0,180,200,0.12); border: 1px solid rgba(0,180,200,0.3);
  border-radius: 12px; padding: 20px 28px;
  display: flex; align-items: center; gap: 12px;
}
.story-result span { font-size: 20px; }
.story-result p { font-size: 14px; color: rgba(255,255,255,0.85); }


/* ─── SECTION SHARED ─── */
section { padding: 80px 24px; }
.section-inner { max-width: 1060px; margin: 0 auto; }
.section-tag {
  display: inline-block; font-size: 11px; font-weight: 700;
  letter-spacing: 0.15em; color: var(--teal-dark);
  background: rgba(0,180,200,0.1); border: 1px solid rgba(0,180,200,0.25);
  border-radius: 100px; padding: 4px 14px; margin-bottom: 14px;
}
h2.section-title {
  font-size: clamp(22px, 3.5vw, 36px); font-weight: 900;
  color: var(--navy); line-height: 1.35; margin-bottom: 16px;
}
.section-sub { font-size: 16px; color: #5a7080; max-width: 640px; line-height: 1.8; margin-bottom: 48px; }


/* ─── PERSONAS ─── */
.personas-bg { background: var(--light-bg); }
.persona-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }
.persona-card {
  background: #fff; border-radius: 16px; padding: 32px;
  box-shadow: var(--card-shadow); border-top: 4px solid var(--teal);
  transition: transform 0.2s, box-shadow 0.2s;
}
.persona-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,80,100,0.14); }
.persona-card.persona-b { border-top-color: var(--orange); }
.persona-avatar {
  font-size: 40px; margin-bottom: 16px;
  width: 64px; height: 64px; background: var(--light-bg);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.persona-card h3 { font-size: 19px; font-weight: 800; color: var(--navy); margin-bottom: 6px; }
.persona-subtitle { font-size: 13px; color: var(--teal-dark); font-weight: 600; margin-bottom: 16px; }
.persona-card p { font-size: 14.5px; color: #4a6070; line-height: 1.8; margin-bottom: 16px; }
.pain-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.pain-list li {
  font-size: 14px; color: #334155;
  display: flex; align-items: flex-start; gap: 10px;
}
.pain-list li::before {
  font-family: 'Material Icons'; content: "warning"; font-size: 16px;
  color: var(--orange); margin-top: 1px; flex-shrink: 0;
  font-feature-settings: 'liga';
}
.pain-quote {
  margin-top: 20px; background: #fff8f0; border-left: 3px solid var(--orange);
  border-radius: 0 8px 8px 0; padding: 14px 16px;
  font-size: 13.5px; color: #7a4020; font-style: italic; line-height: 1.7;
}
.pain-quote-teal { border-left-color: #00B4C8; background: #f0fbfc; color: #1a4a50; }


/* ─── ROI COST ─── */
.roi-section { background: #fff; }
.roi-banner {
  background: linear-gradient(135deg, #1A2E4A 0%, #243C5A 100%);
  border-radius: 20px; padding: 52px 40px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
}
@media (max-width: 700px) { .roi-banner { grid-template-columns: 1fr; } }
.roi-left h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 900; color: #fff; line-height: 1.35; margin-bottom: 18px; }
.roi-left p { font-size: 15px; color: rgba(255,255,255,0.75); line-height: 1.8; }
.roi-left strong { color: #fff; }
.roi-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.roi-stat { border-radius: 12px; padding: 20px; }
.roi-stat .number {
  font-size: 36px; font-weight: 900;
  background: linear-gradient(90deg, var(--teal), #6ee4f0);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  line-height: 1; margin-bottom: 6px;
}
.roi-stat .unit { font-size: 20px; }
.roi-stat .label { font-size: 12.5px; color: rgba(255,255,255,0.7); line-height: 1.5; }
.roi-vs {
  margin-top: 24px; background: rgba(242,101,34,0.15);
  border: 1px solid rgba(242,101,34,0.35); border-radius: 12px;
  padding: 16px 20px; font-size: 14px; color: #ffb899; line-height: 1.7;
}


/* ─── CHALLENGES ─── */
.challenges-bg { background: var(--white); }
.challenges-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.challenges-grid .challenge-card:nth-child(1) { grid-column: 1 / 3; }
.challenges-grid .challenge-card:nth-child(2) { grid-column: 3 / 5; }
.challenges-grid .challenge-card:nth-child(3) { grid-column: 5 / 7; }
.challenges-grid .challenge-card:nth-child(4) { grid-column: 2 / 4; }
.challenges-grid .challenge-card:nth-child(5) { grid-column: 4 / 6; }
@media (max-width: 720px) {
  .challenges-grid { grid-template-columns: 1fr 1fr; }
  .challenges-grid .challenge-card:nth-child(n) { grid-column: auto; }
}
.challenge-card {
  background: #fff; border-radius: 14px; padding: 26px;
  box-shadow: var(--card-shadow); transition: transform 0.2s, box-shadow 0.2s;
}
.challenge-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,80,100,0.14); }
.challenge-num {
  font-size: 11px; font-weight: 800; color: var(--teal-dark);
  background: rgba(0,180,200,0.1); border-radius: 6px;
  padding: 3px 10px; display: inline-block; margin-bottom: 14px; letter-spacing: 0.05em;
}
.challenge-icon { font-size: 26px; margin-bottom: 10px; }
.challenge-card h3 { font-size: 16px; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
.challenge-card p { font-size: 13.5px; color: #5a7080; line-height: 1.7; }


/* ─── CASE STUDIES ─── */
.cases-bg { background: var(--white); }
.cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.case-card {
  background: #fff; border-radius: 16px; padding: 32px;
  box-shadow: var(--card-shadow); border-top: 4px solid var(--teal);
  transition: transform 0.2s, box-shadow 0.2s;
}
.case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,80,100,0.14); }
.case-card-featured { border: 2px solid var(--teal); position: relative; }
.case-featured-badge {
  position: absolute; top: -12px; left: 24px;
  background: var(--teal); color: #fff;
  font-size: 11px; font-weight: 800; letter-spacing: 0.08em;
  padding: 4px 14px; border-radius: 100px;
}
.case-tag {
  display: inline-block; font-size: 11px; font-weight: 700;
  color: var(--teal-dark); background: rgba(0,180,200,0.1);
  border-radius: 100px; padding: 3px 12px; margin-bottom: 14px;
}
.case-card-featured .case-tag { margin-top: 8px; }
.case-card h3 { font-size: 18px; font-weight: 800; color: var(--navy); margin-bottom: 10px; }
.case-card p { font-size: 14px; color: #5a7080; line-height: 1.7; margin-bottom: 20px; }
.case-metrics { display: flex; gap: 16px; flex-wrap: wrap; }
.case-metric {
  background: var(--light-bg); border-radius: 10px; padding: 12px 16px;
  flex: 1; min-width: 100px;
}
.case-metric .number {
  font-size: 28px; font-weight: 900; color: var(--teal-dark);
  line-height: 1; margin-bottom: 4px;
}
.case-metric .unit { font-size: 18px; }
.case-metric .label { font-size: 11.5px; color: #5a7080; line-height: 1.4; }


/* ─── CTA ─── */
.cta-section {
  background: linear-gradient(135deg, #1A2E4A 0%, #0090A0 100%);
  text-align: center; padding: 100px 24px;
}
.cta-section .btn-outline { color: #fff; border-color: rgba(255,255,255,0.5); }
.cta-section .btn-outline:hover { background: rgba(255,255,255,0.15); color: #fff; }
.cta-section h2 { font-size: clamp(24px, 4vw, 42px); font-weight: 900; color: #fff; margin-bottom: 18px; }
.cta-section p { font-size: 16px; color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 36px; line-height: 1.8; }


/* ─── FAQ ACCORDION ─── */
.faq-section { background: var(--light-bg); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
details.faq-item {
  background: #fff; border-radius: 12px; border: 1px solid #d8eaf0;
  overflow: hidden; transition: box-shadow 0.2s;
}
details.faq-item[open] { box-shadow: 0 4px 20px rgba(0,80,100,0.1); }
details.faq-item summary {
  list-style: none; cursor: pointer;
  padding: 20px 24px; font-size: 15px; font-weight: 700; color: var(--navy);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item summary::after {
  font-family: 'Material Icons'; content: "expand_more"; font-size: 20px;
  color: var(--teal); flex-shrink: 0; transition: transform 0.25s;
  font-feature-settings: 'liga';
}
details.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-body { padding: 0 24px 20px; font-size: 14.5px; color: #4a6070; line-height: 1.85; }


/* ─── FOOTER ─── */
footer { background: #F0F4F6; padding: 64px 40px 32px; }
.footer-inner { max-width: 1160px; margin: 0 auto; }
.footer-top {
  display: grid; grid-template-columns: 240px 1fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
.footer-brand p { font-size: 13px; color: #7A9AA8; line-height: 1.65; margin-top: 12px; }
.footer-col h4 {
  font-size: 12px; font-weight: 700; color: #0D1A1F;
  text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 16px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 13px; color: #7A9AA8; text-decoration: none; transition: color 0.15s; }
.footer-col a:hover { color: #0D1A1F; }
.footer-bottom {
  border-top: 1px solid #D8E8ED; padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.footer-bottom p { font-size: 13px; color: #7A9AA8; }
@media (max-width: 1024px) { .footer-top { grid-template-columns: 240px 1fr 1fr 1fr; } }
@media (max-width: 768px) {
  .footer-top { grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
}
@media (max-width: 480px) { .footer-top { grid-template-columns: 1fr 1fr; } }