.detail-header {
  position: relative;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 9, 13, 0.92);
}

.detail-main {
  padding: 80px 10vw 120px;
  background:
    radial-gradient(circle at 80% 10%, rgba(84, 230, 255, 0.1), transparent 28%),
    var(--bg);
}

.back-link {
  display: inline-block;
  margin-bottom: 80px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.back-link:hover {
  color: var(--accent);
}

.detail-hero {
  max-width: 1000px;
  padding-bottom: 100px;
}

.detail-language {
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.24em;
}

.detail-hero h1 {
  margin: 18px 0 28px;
  font-size: clamp(44px, 8vw, 110px);
  overflow-wrap: anywhere;
}

.detail-description {
  max-width: 760px;
  margin-bottom: 38px;
  color: #c4ccd7;
  font-size: clamp(16px, 2vw, 21px);
  line-height: 1.9;
}

.detail-actions {
  margin-top: 38px;
}

.detail-content {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 8vw;
  padding: 100px 0;
  border-top: 1px solid var(--line);
}

.detail-section h2,
.download-panel h2 {
  font-size: clamp(38px, 5vw, 70px);
}

.feature-list {
  display: grid;
  gap: 0;
  margin: 55px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.feature-list li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(150px, 0.55fr) 1fr;
  gap: 30px;
  padding: 28px 20px 28px 45px;
  border-bottom: 1px solid var(--line);
  color: #c4ccd7;
  line-height: 1.7;
}

.feature-list strong {
  color: var(--text);
  font-size: 14px;
}

.feature-list span {
  color: var(--muted);
  font-size: 13px;
}

.feature-list li::before {
  position: absolute;
  left: 10px;
  color: var(--accent);
  content: "+";
  font-weight: 800;
}

.detail-meta {
  padding: 38px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.detail-meta dl,
.detail-meta dd {
  margin: 0;
}

.guide-section {
  padding: 100px 0;
  border-top: 1px solid var(--line);
}

.guide-heading {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8vw;
  align-items: end;
}

.guide-heading h2,
.info-panel h2 {
  font-size: clamp(38px, 5vw, 70px);
}

.guide-heading > p {
  max-width: 500px;
  margin-bottom: 8px;
  color: var(--muted);
  line-height: 1.9;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 65px 0 0;
  padding: 1px;
  background: var(--line);
  list-style: none;
}

.step-list li {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 22px;
  min-height: 190px;
  padding: 32px;
  background: var(--surface);
}

.step-list li > span {
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.step-list strong {
  display: block;
  margin-bottom: 15px;
  color: var(--text);
  font-size: 16px;
}

.step-list p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.9;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-bottom: 100px;
  padding: 1px;
  background: var(--line);
}

.info-panel {
  padding: 55px;
  background: var(--surface);
}

.info-panel-caution {
  background: linear-gradient(135deg, rgba(255, 180, 84, 0.04), var(--surface));
}

.simple-list {
  display: grid;
  gap: 17px;
  margin: 42px 0 0;
  padding: 0;
  list-style: none;
}

.simple-list li {
  position: relative;
  padding-left: 25px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.simple-list li::before {
  position: absolute;
  left: 0;
  color: var(--accent);
  content: "—";
}

.info-panel-caution .simple-list li::before {
  color: #ffb454;
}

.detail-meta dl > div {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.detail-meta dt {
  margin-bottom: 9px;
  color: #687382;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.detail-meta dd {
  color: #dce4ee;
  font-size: 13px;
  line-height: 1.6;
}

.download-panel {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 60px;
  padding: 75px;
  border: 1px solid rgba(84, 230, 255, 0.25);
  background: linear-gradient(135deg, rgba(84, 230, 255, 0.08), rgba(108, 116, 255, 0.04));
}

.download-panel p:last-child {
  max-width: 620px;
  margin: 25px 0 0;
  color: var(--muted);
  line-height: 1.9;
}

.credit-panel {
  margin-top: 70px;
  padding-top: 38px;
  border-top: 1px solid var(--line);
}

.credit-panel p:last-child {
  max-width: 900px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 2;
}

.credit-panel a {
  color: var(--accent);
  border-bottom: 1px solid rgba(84, 230, 255, 0.4);
}

.credit-panel a:hover {
  border-color: var(--accent);
}

@media (max-width: 800px) {
  .detail-main {
    padding: 55px 24px 80px;
  }

  .back-link {
    margin-bottom: 55px;
  }

  .detail-hero {
    padding-bottom: 70px;
  }

  .detail-content {
    grid-template-columns: 1fr;
    padding: 70px 0;
  }

  .feature-list li,
  .guide-heading,
  .step-list,
  .info-grid {
    grid-template-columns: 1fr;
  }

  .feature-list li {
    gap: 8px;
  }

  .guide-section {
    padding: 70px 0;
  }

  .step-list {
    margin-top: 45px;
  }

  .step-list li {
    min-height: 0;
    padding: 28px 24px;
  }

  .info-grid {
    margin-bottom: 70px;
  }

  .info-panel {
    padding: 38px 25px;
  }

  .download-panel {
    display: block;
    padding: 38px 25px;
  }

  .download-panel .button {
    width: 100%;
    margin-top: 34px;
  }
}