:root {
  --bg: #f7f9fb;
  --surface: #ffffff;
  --surface-muted: #eaf0f4;
  --text: #17202a;
  --muted: #5d6874;
  --line: #dfe6ed;
  --primary: #0f766e;
  --primary-dark: #0b2238;
  --gold: #d7b46a;
  --hot: #f05a28;
  --danger: #dc2626;
  --shadow: 0 12px 32px rgba(23, 32, 42, 0.08);
  --strong-shadow: 0 22px 55px rgba(15, 53, 84, 0.2);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.container,
.site-header,
.site-footer {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.78rem;
}

.brand-mark {
  display: inline-flex;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.92rem;
}

nav a {
  color: #384756;
  text-decoration: none;
}

nav a:hover {
  color: var(--primary);
}

.hero {
  padding: 92px 0 78px;
  background:
    radial-gradient(circle at 82% 20%, rgba(240, 90, 40, 0.44), transparent 24%),
    radial-gradient(circle at 10% 80%, rgba(215, 180, 106, 0.26), transparent 26%),
    linear-gradient(120deg, #071827, #0a5f57 58%, #17344c);
  color: #fff;
}

.hero.compact {
  padding: 74px 0 58px;
}

.badge {
  display: inline-flex;
  margin: 0 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 999px;
  padding: 7px 13px;
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.95);
  font-size: 0.9rem;
  font-weight: 700;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  max-width: 900px;
  margin-bottom: 20px;
  font-size: clamp(2.35rem, 5.8vw, 4.65rem);
  line-height: 1.12;
  letter-spacing: 0;
}

.lead {
  max-width: 820px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.22rem;
  line-height: 1.8;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.plain-summary {
  display: flex;
  width: 100%;
  max-width: 900px;
  gap: 10px;
  align-items: flex-start;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  padding: 14px 16px;
  margin: -10px 0 24px;
  color: rgba(255, 255, 255, 0.94);
}

.plain-summary strong {
  white-space: nowrap;
}

.loss-banner {
  display: grid;
  width: 100%;
  max-width: 900px;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  border: 1px solid rgba(247, 215, 125, 0.65);
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(15, 53, 84, 0.82), rgba(15, 118, 110, 0.76));
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.18);
  margin: -8px 0 26px;
  padding: 16px 18px;
}

.loss-banner span {
  border-radius: 999px;
  background: rgba(247, 215, 125, 0.22);
  border: 1px solid rgba(247, 215, 125, 0.34);
  padding: 6px 10px;
  color: #ffe8a5;
  font-size: 0.86rem;
  font-weight: 900;
  white-space: nowrap;
}

.loss-banner strong {
  color: #fff;
  font-size: clamp(1rem, 2vw, 1.22rem);
  line-height: 1.45;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  border: 1px solid var(--gold);
  background: linear-gradient(135deg, #f7d77d, #d7b46a);
  color: var(--text);
  box-shadow: 0 16px 34px rgba(215, 180, 106, 0.34);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.34);
  color: #fff;
}

.button.large {
  min-height: 58px;
  padding: 0 24px;
  font-size: 1.02rem;
}

.note {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
}

.strip {
  border-bottom: 1px solid var(--line);
  background: #fff;
  padding: 16px 0;
}

.strip .container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.section {
  padding: 60px 0;
}

.alert-section {
  padding: 34px 0 22px;
  background: #fff;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.problem-grid article {
  border: 2px solid rgba(220, 38, 38, 0.16);
  border-radius: 10px;
  background: linear-gradient(180deg, #fff, #fff7f2);
  box-shadow: 0 14px 32px rgba(220, 38, 38, 0.1);
  padding: 20px;
}

.problem-grid strong {
  display: block;
  margin-bottom: 8px;
  color: var(--danger);
  font-size: 1.12rem;
}

.problem-grid p {
  margin: 0;
  color: #394657;
}

.section.muted {
  background: var(--surface-muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 24px;
  align-items: start;
}

.info-grid,
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.info-block,
.idea-card,
.cta-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.info-block,
.idea-card {
  padding: 24px;
}

.idea-card {
  display: block;
  color: inherit;
  text-decoration: none;
}

.idea-card span {
  display: block;
  margin-bottom: 12px;
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 800;
}

.idea-card:hover {
  border-color: var(--primary);
}

.info-block h2,
.heading h2,
.cta-panel h2,
.idea-card h2 {
  margin-bottom: 14px;
  color: #0f3554;
  letter-spacing: 0;
}

.info-block ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 1.2rem;
}

.info-block li {
  line-height: 1.65;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  line-height: 1.7;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.22em;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  content: "!";
  font-size: 0.78rem;
  font-weight: 900;
  line-height: 18px;
  text-align: center;
}

.report-preview {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 22px;
}

.report-preview span {
  display: block;
  margin-bottom: 12px;
  color: var(--primary);
  font-size: 0.88rem;
  font-weight: 800;
}

.report-preview strong {
  display: block;
  margin-bottom: 10px;
  color: #0f3554;
  font-size: 1.25rem;
  line-height: 1.35;
}

.steps h2 {
  color: #0f3554;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.step-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 22px;
}

.step-grid span {
  display: inline-flex;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

.step-grid h3 {
  margin: 14px 0 8px;
  color: #0f3554;
}

.step-grid p {
  margin: 0;
  color: var(--muted);
}

.heading {
  max-width: 760px;
  margin-bottom: 22px;
}

.heading p,
.idea-card p,
.cta-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.keyword-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.keyword-list span {
  border: 1px solid #cbd7e2;
  border-radius: 999px;
  background: #fff;
  padding: 8px 12px;
  font-size: 0.92rem;
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 24px;
  align-items: center;
  border: 2px solid rgba(15, 118, 110, 0.26);
  background:
    radial-gradient(circle at 100% 0%, rgba(240, 90, 40, 0.16), transparent 28%),
    linear-gradient(135deg, #ffffff, #edf8f6);
  box-shadow: var(--strong-shadow);
  padding: clamp(24px, 4vw, 44px);
}

.cta-panel h2 {
  margin-bottom: 12px;
  font-size: clamp(1.6rem, 3.5vw, 2.35rem);
  line-height: 1.25;
}

.cta-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  border-radius: 999px;
  background: var(--hot);
  color: #fff;
  padding: 6px 12px;
  font-size: 0.86rem;
  font-weight: 900;
}

.cta-actions {
  display: grid;
  gap: 12px;
  justify-items: stretch;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 32px 0;
  color: var(--muted);
}

.site-footer p {
  margin: 0 0 8px;
}

.site-footer a,
.privacy-note a {
  color: var(--primary);
}

.footer-disclaimer {
  max-width: 860px;
  font-size: 0.9rem;
}

.privacy-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.faq {
  max-width: 900px;
}

.faq h2 {
  color: #0f3554;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 16px 18px;
  margin-top: 12px;
}

.faq summary {
  cursor: pointer;
  font-weight: 800;
}

.faq p {
  margin: 12px 0 0;
  color: var(--muted);
}

.policy {
  max-width: 860px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 30px;
}

.policy h2 {
  color: #0f3554;
  margin-top: 28px;
}

.policy h2:first-child {
  margin-top: 0;
}

.policy p {
  color: var(--muted);
}

.policy-date {
  margin-top: 30px;
  font-size: 0.9rem;
}

.article-hero {
  padding: 76px 0 54px;
  background:
    radial-gradient(circle at 86% 16%, rgba(215, 180, 106, 0.2), transparent 26%),
    linear-gradient(120deg, #071827, #0a5f57 64%, #17344c);
  color: #fff;
}

.article-container {
  max-width: 780px;
}

.article-hero h1 {
  color: #fff;
}

.article-lead {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.18rem;
  line-height: 1.8;
}

.article-body {
  padding: 52px 18px 72px;
  background: #fff;
}

.article-body h2 {
  margin-top: 52px;
  margin-bottom: 14px;
  color: #0f3554;
  font-size: clamp(1.55rem, 3vw, 2rem);
  line-height: 1.35;
}

.article-body p,
.article-body li {
  color: #2f3b49;
  font-size: 1.08rem;
  line-height: 2;
}

.article-body ul {
  display: grid;
  gap: 8px;
  margin: 18px 0 28px;
  padding-left: 1.4rem;
}

.article-note {
  display: flex;
  gap: 10px;
  border: 1px solid rgba(15, 118, 110, 0.22);
  border-radius: 8px;
  background: #edf8f6;
  margin-bottom: 36px;
  padding: 18px;
}

.article-note strong {
  color: var(--primary);
  white-space: nowrap;
}

.article-callout {
  border-left: 6px solid var(--gold);
  border-radius: 8px;
  background: #fff8e6;
  margin: 44px 0;
  padding: 20px 22px;
}

.article-callout span {
  display: inline-flex;
  border-radius: 999px;
  background: #7c4f00;
  color: #fff;
  padding: 4px 10px;
  font-size: 0.82rem;
  font-weight: 900;
}

.article-callout p {
  margin: 12px 0 0;
}

.check-panel {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  margin: 18px 0 46px;
  padding: 26px;
}

.check-panel.status {
  background: linear-gradient(135deg, #ffffff, #edf8f6);
  border-color: rgba(15, 118, 110, 0.24);
}

.check-panel.code {
  background: linear-gradient(135deg, #ffffff, #fff8e6);
  border-color: rgba(215, 180, 106, 0.4);
}

.check-panel.brand-panel {
  background: linear-gradient(135deg, #ffffff, #eef4ff);
  border-color: rgba(49, 89, 166, 0.24);
}

.check-panel.inventory {
  background: linear-gradient(135deg, #ffffff, #fff2ed);
  border-color: rgba(240, 90, 40, 0.24);
}

.check-panel.app-panel {
  background: linear-gradient(135deg, #ffffff, #f2f0ff);
  border-color: rgba(98, 80, 180, 0.22);
}

.check-panel-icon {
  display: flex;
  min-height: 92px;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: #0f766e;
  color: #fff;
  font-weight: 900;
  text-align: center;
}

.check-panel.code .check-panel-icon {
  background: #a96f00;
}

.check-panel.brand-panel .check-panel-icon {
  background: #3159a6;
}

.check-panel.inventory .check-panel-icon {
  background: var(--hot);
}

.check-panel.app-panel .check-panel-icon {
  background: #6250b4;
}

.check-panel p:first-child {
  margin-top: 0;
}

.check-panel p:last-child,
.check-panel ul:last-child {
  margin-bottom: 0;
}

.visual-flow,
.error-map {
  margin: 52px 0;
}

.visual-flow h2,
.error-map h2 {
  margin-top: 0;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.flow-steps div {
  position: relative;
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff, #edf8f6);
  box-shadow: var(--shadow);
  padding: 20px 15px;
}

.flow-steps span {
  display: inline-flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
}

.flow-steps strong {
  display: block;
  margin-top: 12px;
  color: #0f3554;
  font-size: 1rem;
  line-height: 1.4;
}

.flow-steps p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.map-grid article {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 22px;
}

.map-grid span {
  display: inline-flex;
  border-radius: 999px;
  background: #fff3d2;
  color: #7c4f00;
  padding: 5px 10px;
  font-size: 0.84rem;
  font-weight: 900;
}

.map-grid strong {
  display: block;
  margin: 12px 0 8px;
  color: #0f3554;
  font-size: 1.18rem;
}

.map-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.75;
}

.article-toc {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7f9fb;
  margin-bottom: 28px;
  padding: 18px;
}

.article-toc strong {
  color: #0f3554;
}

.article-toc a {
  color: var(--primary);
  text-decoration: none;
}

.article-toc a:hover {
  text-decoration: underline;
}

.article-cta {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  border: 2px solid rgba(15, 118, 110, 0.24);
  border-radius: 10px;
  background: linear-gradient(135deg, #fff, #edf8f6);
  box-shadow: var(--strong-shadow);
  margin-top: 58px;
  padding: 30px;
}

.article-cta h2 {
  margin-top: 0;
}

@media (max-width: 900px) {
  .site-header,
  .cta-panel {
    align-items: flex-start;
  }

  .info-grid,
  .card-grid,
  .two-column,
  .step-grid,
  .cta-panel,
  .problem-grid,
  .flow-steps,
  .map-grid,
  .check-panel,
  .article-cta {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .container,
  .site-header,
  .site-footer {
    width: min(100% - 24px, 1120px);
  }

  nav {
    gap: 10px;
  }

  .button {
    width: 100%;
  }

  .loss-banner {
    grid-template-columns: 1fr;
  }

  .check-panel {
    padding: 20px;
  }

  .check-panel-icon {
    min-height: 58px;
    border-radius: 12px;
  }
}