/* roulang page: index */
:root {
  --primary: #E96B4A;
  --primary-dark: #D25434;
  --primary-soft: #F9E3D9;
  --bg: #FBF7F4;
  --surface: #FFFFFF;
  --surface-alt: #F4EAE3;
  --text: #221B17;
  --text-muted: #77685D;
  --border: #E9DED6;
  --dark-bg: #201916;
  --dark-surface: #2A211C;
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-sm: 0 2px 12px rgba(34, 27, 23, 0.04);
  --shadow-md: 0 8px 30px rgba(34, 27, 23, 0.08);
  --shadow-brand: 0 10px 28px rgba(233, 107, 74, 0.24);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 72px;
  --container: 1200px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

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

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.section { padding: 96px 0; position: relative; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--primary-dark);
  background: var(--primary-soft);
  padding: 8px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.section-title {
  margin: 0;
  font-size: clamp(1.9rem, 3vw, 2.75rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-lead {
  margin-top: 14px;
  max-width: 720px;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.85;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-weight: 650;
  line-height: 1;
  cursor: pointer;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease), transform 0.18s var(--ease), box-shadow 0.22s var(--ease);
  text-align: center;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid rgba(233, 107, 74, 0.4);
  outline-offset: 2px;
}

.btn:active { transform: translateY(1px) scale(0.99); }

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(233, 107, 74, 0.2);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
}

.btn-outline {
  border-color: rgba(255, 255, 255, 0.8);
  color: #fff;
  background: transparent;
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--surface-alt);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.btn-lg { padding: 16px 30px; font-size: 1.02rem; }
.btn-md { padding: 12px 22px; font-size: 0.95rem; }
.btn-sm { padding: 10px 18px; font-size: 0.9rem; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  background: rgba(251, 247, 244, 0.9);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid rgba(233, 222, 214, 0.72);
  z-index: 50;
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text);
  border-radius: 8px;
}
.brand:focus-visible { outline: 3px solid rgba(233, 107, 74, 0.4); outline-offset: 4px; }
.brand svg { width: 36px; height: 36px; color: var(--primary); flex: none; }

/* Hero */
.hero {
  padding: calc(var(--header-h) + 72px) 0 92px;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}
.hero-background {
  position: absolute;
  inset: 0;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  mask-image: linear-gradient(90deg, rgba(0,0,0,0.7), rgba(0,0,0,0.25) 75%);
  -webkit-mask-image: linear-gradient(90deg, rgba(0,0,0,0.7), rgba(0,0,0,0.25) 75%);
  pointer-events: none;
}
.hero-background::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(251,247,244,0.95) 15%, rgba(251,247,244,0.72) 55%, rgba(251,247,244,0.4) 100%);
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
}

.hero-title {
  font-size: clamp(2.25rem, 4.6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.035em;
  margin: 12px 0 18px;
  color: var(--text);
}
.hero-title em {
  font-style: normal;
  color: var(--primary);
}
.hero-sub {
  font-size: 1.06rem;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 0 28px;
}
.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 16px;
}
.hero-platform {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.83rem;
  font-weight: 600;
}
.hero-badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #35B98A;
  display: block;
}

/* metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.metric-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
  min-height: 150px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-soft);
}
.metric-value {
  font-size: clamp(2.15rem, 3.2vw, 3rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-top: auto;
}
.metric-value small {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}
.metric-label {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-top: 10px;
}
.metric-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.55;
}

/* feature bento */
.section.mist-bg { background: var(--bg); }

.feature-bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
  margin-top: 52px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #f0d6ca;
}
.feature-media {
  aspect-ratio: 16 / 9;
  background: var(--surface-alt);
  position: relative;
  overflow: hidden;
}
.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-body {
  padding: 26px 26px 28px;
}
.feature-body h3 {
  font-size: 1.4rem;
  font-weight: 750;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.feature-body p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.8;
}
.feature-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.feature-main { grid-column: span 7; }
.feature-aside { grid-column: span 5; }
.feature-mini { grid-column: span 5; }
.feature-mini-old { grid-column: span 4; }
.feature-bottom { grid-column: span 4; }

.feature-mini .feature-body h3 { font-size: 1.15rem; }
.feature-mini .feature-body { padding: 22px; }
.feature-media-mini { aspect-ratio: 16 / 8; }

/* section sub */
.block-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}
.block-head-bottom {
  margin-top: 60px;
  display: flex;
  justify-content: flex-end;
}

/* compare */
.compare-section {
  background: var(--dark-bg);
  color: #FBF7F4;
  padding: 104px 0;
}
.compare-section .section-title { color: #FBF7F4; }
.compare-section .section-lead { color: #EADBD2; }

.compare-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 52px;
}
.compare-card {
  background: var(--dark-surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 28px;
}
.compare-card-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.08rem;
  font-weight: 750;
  margin-bottom: 24px;
}
.panel-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
}
.panel-mark.base { background: #4A3D36; color: #D9C3B6; }
.panel-mark.brand { background: var(--primary); color: #fff; }
.compare-card-title span small {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: #A99A8E;
}

.cmp-list { display: flex; flex-direction: column; gap: 22px; }
.cmp-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.9rem;
  flex-wrap: wrap;
}
.cmp-line .cmp-key { color: #EADBD2; font-weight: 600; }
.cmp-line .cmp-value {
  font-size: 1.3rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}
.compare-card.base .cmp-value { color: #C3B4AA; }
.compare-card.brand .cmp-value { color: #FFA984; }

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 72px;
  align-items: start;
}
.accordion {
  border-top: 1px solid var(--border);
}
details {
  border-bottom: 1px solid var(--border);
  transition: border-color 0.2s ease;
}
details[open] {
  border-bottom-color: var(--border);
}
summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 4px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  transition: color 0.2s ease;
}
summary::-webkit-details-marker { display: none; }
summary:hover { color: var(--primary-dark); }
summary:focus-visible {
  outline: 3px solid rgba(233, 107, 74, 0.3);
  border-radius: 10px;
}
summary .acc-icon {
  width: 28px;
  height: 28px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: transform 0.3s var(--ease), background 0.2s ease;
  position: relative;
}
summary .acc-icon::before, summary .acc-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  border-radius: 2px;
}
summary .acc-icon::before { width: 11px; height: 1.6px; }
summary .acc-icon::after { width: 1.6px; height: 11px; }
details[open] summary .acc-icon { transform: rotate(45deg); background: var(--primary-soft); border-color: var(--primary-soft); color: var(--primary-dark); }

.acc-content {
  padding: 0 32px 24px 0;
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.85;
}

/* form */
.download-section {
  background: var(--primary-soft);
  padding: 104px 0 96px;
}
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}
.download-info .section-title {
  font-size: clamp(2rem, 3.4vw, 3.2rem);
  line-height: 1.18;
}
.download-info p {
  color: #5C493C;
  margin: 18px 0;
  font-size: 1.02rem;
  line-height: 1.9;
}
.download-feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
  padding: 24px 0 0;
  margin: 0;
  list-style: none;
}
.download-feature-list li {
  display: flex;
  gap: 10px;
  align-items: center;
  color: #5C493C;
  font-size: 0.9rem;
}
.download-feature-list li svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
  flex: none;
}

.form-panel {
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 16px 48px rgba(160, 92, 63, 0.14);
  padding: 34px;
}
.form-panel h3 {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 6px;
}
.form-panel > p {
  color: var(--text-muted);
  margin: 0 0 24px;
  font-size: 0.88rem;
}
.field { margin-bottom: 16px; }
.field label {
  display: block;
  font-size: 0.78rem;
  font-weight: 650;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.03em;
}
.field input, .field select {
  width: 100%;
  height: 50px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  padding: 0 16px;
  font-size: 0.92rem;
  color: var(--text);
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.field input::placeholder { color: #B6A99E; }
.field input:focus, .field select:focus {
  outline: none;
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(233, 107, 74, 0.18);
}
.form-submit {
  width: 100%;
  height: 54px;
  margin-top: 6px;
}
.fine-print {
  margin-top: 12px;
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
}
.form-succ {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  background: #EAF4EB;
  color: #2E7D32;
  font-size: 0.84rem;
  text-align: center;
}

/* footer */
.site-footer {
  background: var(--dark-bg);
  color: #D9C3B6;
  padding: 64px 0 34px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand {
  font-size: 1.3rem;
  font-weight: 800;
  color: #FBF7F4;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.footer-brand svg { width: 32px; height: 32px; color: var(--primary); }
.footer-col h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #FBF7F4;
  margin: 0 0 14px;
}
.footer-col a {
  display: block;
  color: #C3B4AA;
  padding: 5px 0;
  font-size: 0.92rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: #A99A8E;
  font-size: 0.83rem;
}
.backtop {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #D9C3B6;
  font-size: 0.83rem;
}
.backtop:hover { color: #fff; }

/* reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in-view { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* mobile */
@media (max-width: 1024px) {
  .star { padding: 84px 0; }
  .hero-grid, .download-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero { padding-top: 130px; }
  .feature-bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-main, .feature-aside, .feature-mini-old, .feature-bottom { grid-column: span 2; }
  .feature-mini { grid-column: span 1; }
  .faq-grid { grid-template-columns: 1fr; gap: 36px; }
  .compare-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .section { padding: 64px 0; }
  .container { width: calc(100% - 40px); }
  .metrics-grid { grid-template-columns: 1fr 1fr; }
  .metric-card { min-height: 0; }
  .metric-value { font-size: 1.75rem; }
  .feature-bento { grid-template-columns: 1fr; }
  .feature-main, .feature-aside, .feature-mini, .feature-mini-old, .feature-bottom { grid-column: auto; }
  .compare-section { padding: 64px 0; }
  .compare-card { padding: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .fold-top { display: none; }
  .btn-lg { width: 100%; }
  .hero-sub { font-size: 1rem; }
}

@media (max-width: 400px) {
  .compare-line { flex-direction: column; gap: 8px; }
}

/* roulang page: category1 */
:root {
  --primary: #E96B4A;
  --primary-dark: #D25434;
  --primary-soft: #F9E3D9;
  --bg: #FBF7F4;
  --surface: #FFFFFF;
  --surface-alt: #F4EAE3;
  --text: #221B17;
  --text-muted: #77685D;
  --border: #E9DED6;
  --dark-bg: #201916;
  --dark-surface: #2A211C;
  --dark-text: #F7EFE9;
  --dark-muted: #BFAEA3;
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-sm: 0 2px 12px rgba(34, 27, 23, 0.04);
  --shadow-md: 0 8px 30px rgba(34, 27, 23, 0.08);
  --shadow-brand: 0 10px 28px rgba(233, 107, 74, 0.24);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 72px;
  --container: 1200px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
figure, dl, dd, blockquote { margin: 0; }

::selection { background: rgba(233, 107, 74, 0.2); color: var(--text); }

:focus-visible { outline: 3px solid rgba(233, 107, 74, 0.38); outline-offset: 3px; border-radius: 6px; }

.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

.section { padding: 100px 0; }
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--primary-dark);
  background: var(--primary-soft);
  padding: 8px 15px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.section-title {
  margin: 0;
  font-size: clamp(1.95rem, 2.6vw, 2.7rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.section-intro {
  margin-top: 16px;
  max-width: 720px;
  color: var(--text-muted);
  line-height: 1.85;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), color 0.22s var(--ease), transform 0.2s var(--ease), box-shadow 0.22s var(--ease);
}
.btn:active { transform: translateY(1px) scale(0.99); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 6px 18px rgba(233, 107, 74, 0.2);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-brand);
  transform: translateY(-2px);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(233, 107, 74, 0.46);
  outline-offset: 2px;
}
.btn-lg { padding: 16px 30px; font-size: 1.02rem; }
.btn-md { padding: 13px 24px; font-size: 0.96rem; }
.btn-sm { padding: 10px 19px; font-size: 0.9rem; }

/* header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  background: rgba(251, 247, 244, 0.9);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid rgba(233, 222, 214, 0.78);
  z-index: 80;
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text);
  border-radius: 10px;
}
.brand:focus-visible { outline: 3px solid rgba(233, 107, 74, 0.42); outline-offset: 4px; }
.brand svg { width: 36px; height: 36px; color: var(--primary); flex: none; }

/* category hero */
.cat-hero {
  padding: calc(var(--header-h) + 70px) 0 90px;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(100deg, rgba(251, 247, 244, 0.97) 6%, rgba(251, 247, 244, 0.9) 42%, rgba(251, 247, 244, 0.68) 80%, rgba(251, 247, 244, 0.72) 100%),
    url('/assets/images/backpic/back-1.jpg') no-repeat center / cover;
  background-color: var(--bg);
}
.cat-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -220px;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 107, 74, 0.14), transparent 68%);
  pointer-events: none;
}
.cat-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  gap: 60px;
  align-items: center;
}
.cat-hero h1 {
  font-size: clamp(2rem, 3.6vw, 3.2rem);
  line-height: 1.16;
  letter-spacing: -0.035em;
  font-weight: 800;
  margin: 0 0 18px;
}
.cat-hero h1 span { color: var(--primary); }
.hero-summary {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 0 30px;
  line-height: 1.9;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.hero-platform-note { font-size: 0.85rem; color: var(--text-muted); letter-spacing: 0.02em; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.hero-platform-note strong { color: var(--text); font-weight: 700; }
.hero-illustration { position: relative; }
.hero-illustration .visual-main {
  border-radius: calc(var(--radius-card) + 8px);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  transform: rotate(1.3deg);
}
.hero-illustration .visual-main img { aspect-ratio: 5 / 4; object-fit: cover; width: 100%; }
.hero-visual-caption {
  margin-top: 10px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.84rem;
  color: var(--text-muted);
  box-shadow: var(--shadow-sm);
}
.hero-visual-caption i { width: 8px; height: 8px; border-radius: 50%; background: #35B98A; display: block; }

/* showcase / guide */
.showcase-block {
  margin-top: 30px;
  border-top: 1px solid var(--border);
  padding-top: 66px;
}
.showcase-block:first-of-type { margin-top: 0; border-top: 0; padding-top: 0; }
.showcase-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 56px;
  align-items: center;
}
.showcase-grid.swapped .showcase-media { order: 2; }
.showcase-media {
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--surface-alt);
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  position: relative;
  box-shadow: var(--shadow-sm);
}
.showcase-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.showcase-media:hover img { transform: scale(1.02); }
.showcase-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--primary-dark);
  margin-bottom: 14px;
}
.showcase-copy h3 { font-size: 1.65rem; line-height: 1.32; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 14px; }
.showcase-copy p { color: var(--text-muted); margin: 0 0 16px; }
.showcase-points { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.showcase-points li { display: flex; gap: 12px; align-items: flex-start; color: var(--text); }
.showcase-points li::before {
  content: "";
  width: 20px;
  height: 20px;
  flex: none;
  margin-top: 5px;
  border-radius: 50%;
  background: var(--primary-soft);
  border: 1px solid rgba(233, 107, 74, 0.32);
}
.showcase-points li strong { font-weight: 700; }

/* depth strip */
.bg-soft-section { background: #F7EFE9; }
.inline-note-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 28px;
  list-style: none;
  padding: 0;
  margin: 26px 0 0;
}
.inline-note-list li { color: var(--text-muted); display: flex; gap: 12px; align-items: flex-start; font-size: 0.96rem; line-height: 1.8; }
.inline-note-list li::before {
  content: "";
  width: 10px;
  height: 10px;
  border: 2px solid var(--primary);
  border-radius: 3px;
  flex: none;
  margin-top: 9px;
}

/* spec data */
.spec-summary {
  background: var(--dark-bg);
  border-radius: calc(var(--radius-card) + 8px);
  padding: 58px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.spec-summary::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -90px;
  top: -120px;
  border-radius: 50%;
  background: rgba(233, 107, 74, 0.18);
}
.spec-summary h2 { font-size: clamp(1.75rem, 2.8vw, 2.5rem); line-height: 1.25; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 20px; }
.spec-summary p { color: rgba(255,255,255,0.72); max-width: 680px; margin: 0 0 32px; line-height: 1.9; }
.spec-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 20px; position: relative; z-index: 2; }
.spec-item {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-card);
  padding: 22px 24px;
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}
.spec-item:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.24); }
.spec-label { font-size: 0.82rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--dark-muted); display: block; margin-bottom: 10px; }
.spec-value { font-weight: 800; font-size: 1.3rem; line-height: 1.4; letter-spacing: -0.01em; }
.spec-value small { font-size: 0.9rem; color: #E9B29C; font-weight: 650; }

/* steps */
.steps-wrap {
  margin-top: 48px;
  position: relative;
  padding-left: 28px;
  display: grid;
  gap: 26px;
}
.steps-wrap::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 20px;
  width: 2px;
  background: linear-gradient(var(--primary-soft), var(--primary));
}
.step-line { position: relative; padding-left: 20px; }
.step-line::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 5px var(--primary-soft);
  z-index: 1;
}
.step-line h3 { font-size: 1.2rem; margin: 0 0 8px; font-weight: 750; letter-spacing: -0.01em; }
.step-line p { margin: 0; color: var(--text-muted); max-width: 660px; line-height: 1.9; }

/* faq */
.faq-grid {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 60px;
  align-items: start;
}
.faq-list { display: grid; gap: 14px; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.faq-item:hover { border-color: var(--primary-soft); box-shadow: var(--shadow-sm); }
.faq-item[open] { border-color: rgba(233, 107, 74, 0.5); box-shadow: var(--shadow-sm); }
.faq-item summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.5;
  border-radius: var(--radius-card);
  transition: color 0.2s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary-dark); }
.faq-item summary:focus-visible { outline-offset: -4px; }
.faq-item summary .faq-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  font-size: 1.2rem;
  flex: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), transform 0.25s var(--ease);
}
.faq-item[open] summary .faq-icon { background: var(--primary); color: #fff; transform: rotate(135deg); }
.faq-answer { padding: 0 26px 22px; color: var(--text-muted); font-size: 0.98rem; line-height: 1.95; }
.faq-answer a { color: var(--primary-dark); border-bottom: 1px solid rgba(233,107,74,0.35); transition: border-color 0.2s var(--ease); text-underline-offset: 4px; }
.faq-answer a:hover { border-color: var(--primary-dark); }

/* cta plate */
.cta-section { padding: 70px 0 100px; }
.download-plate {
  background: var(--dark-bg);
  color: #fff;
  border-radius: calc(var(--radius-card) + 12px);
  padding: 68px 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 48px;
  position: relative;
  overflow: hidden;
}
.download-plate::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-6.jpg') no-repeat center / cover;
  opacity: 0.14;
}
.download-content, .download-action { position: relative; z-index: 2; }
.download-content h2 { font-size: clamp(1.9rem, 3vw, 2.85rem); line-height: 1.25; font-weight: 800; letter-spacing: -0.03em; margin: 0 0 16px; }
.download-content p { color: rgba(255,255,255,0.72); margin: 0 0 24px; max-width: 640px; line-height: 1.9; }
.environment-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.environment-tags span {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  color: #F7E4DB;
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 0.84rem;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.environment-tags i { width: 6px; height: 6px; border-radius: 50%; background: #F0A285; display: block; }
.download-action { text-align: left; }
.download-action .btn { box-shadow: none; }
.download-action .btn-primary { box-shadow: 0 6px 26px rgba(233, 107, 74, 0.4); }
.download-note { margin-top: 16px; font-size: 0.84rem; color: rgba(255,255,255,0.58); line-height: 1.7; max-width: 250px; }

/* footer */
.site-footer {
  background: #1A1512;
  color: rgba(255,255,255,0.82);
  padding: 70px 0 26px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 0.9fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.18rem;
  font-weight: 800;
}
.footer-brand svg { width: 32px; height: 32px; color: var(--primary); }
.footer-col { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.footer-col h4 {
  color: #fff;
  font-size: 0.94rem;
  font-weight: 750;
  margin: 0 0 8px;
  letter-spacing: 0.03em;
}
.footer-col a {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.68);
  padding: 4px 0;
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
  border-bottom: 1px solid transparent;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 0.86rem;
  color: rgba(255,255,255,0.52);
}
.backtop {
  border: 1px solid rgba(255,255,255,0.16);
  padding: 8px 14px;
  border-radius: 999px;
  color: rgba(255,255,255,0.74);
  font-size: 0.82rem;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease), background 0.22s var(--ease);
  background: transparent;
}
.backtop:hover { color: var(--primary); border-color: var(--primary); background: rgba(233,107,74,0.08); }

/* reveal animation */
.reveal { opacity: 1; transform: none; transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }

/* responsive */
@media (max-width: 1024px) {
  .section { padding: 84px 0; }
  .cat-hero { padding: calc(var(--header-h) + 50px) 0 72px; }
  .cat-hero-inner { gap: 42px; }
  .showcase-grid { gap: 36px; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); }
  .spec-summary { padding: 44px; }
  .faq-grid { gap: 42px; }
  .download-plate { grid-template-columns: 1fr; padding: 52px; gap: 28px; }
  .download-action { text-align: left; }
}

@media (max-width: 900px) {
  .cat-hero-inner { grid-template-columns: 1fr; }
  .hero-illustration { max-width: 620px; }
  .showcase-grid { gap: 24px; }
  .showcase-grid, .showcase-grid.swapped { grid-template-columns: 1fr; }
  .showcase-grid.swapped .showcase-media { order: 0; }
  .showcase-media { aspect-ratio: 16 / 10; }
  .faq-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 0.7fr 0.9fr; }
}

@media (max-width: 760px) {
  .container { width: min(100% - 32px, var(--container)); }
  .section, .section.mist-bg { padding: 72px 0; }
  .site-header { --header-h: 64px; }
  .brand svg { width: 32px; height: 32px; }
  .btn-sm { padding: 10px 16px; font-size: 0.86rem; }
  .cat-hero { padding: calc(var(--header-h) + 46px) 0 56px; }
  .cat-hero h1 { font-size: clamp(1.7rem, 6.5vw, 2.4rem); }
  .section-title, .download-content h2 { font-size: 1.7rem; }
  .inline-note-list { grid-template-columns: 1fr; }
  .hero-visual-caption { font-size: 0.78rem; }
  .spec-summary { padding: 30px; border-radius: var(--radius-card); }
  .spec-grid { grid-template-columns: 1fr; gap: 14px; }
  .showcase-block { padding-top: 44px; }
  .steps-wrap { padding-left: 20px; }
  .step-line::before { left: -25px; }
  .faq-item summary { padding: 17px 18px; font-size: 0.98rem; }
  .faq-answer { padding-left: 20px; padding-right: 20px; }
  .download-plate { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; padding-bottom: 30px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 520px) {
  .section { padding: 64px 0; }
  .cat-hero-inner { gap: 28px; }
  .hero-actions .btn { width: 100%; }
  .showcase-copy h3 { font-size: 1.35rem; }
  .spec-value { font-size: 1.18rem; }
  .download-content h2 { font-size: 1.65rem; }
  .hero-illustration .visual-main { transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}