:root {
  --bg: #050505;
  --bg-soft: #101010;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-strong: rgba(255, 255, 255, 0.09);
  --line: rgba(255, 255, 255, 0.1);
  --line-strong: rgba(255, 255, 255, 0.18);
  --text: #f4f3ef;
  --muted: #b5b4ad;
  --muted-2: #8b8a84;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.26);
  --radius: 28px;
  --radius-l: 38px;
  --maxw: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at 20% 10%, rgba(255, 255, 255, 0.05), transparent 25%),
    radial-gradient(circle at 82% 16%, rgba(255, 255, 255, 0.04), transparent 20%),
    linear-gradient(180deg, #050505 0%, #090909 44%, #040404 100%);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at center, black 38%, transparent 82%);
  pointer-events: none;
  opacity: 0.42;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  width: 100%;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.nav {
  width: min(calc(100% - 28px), var(--maxw));
  margin: 16px auto 0;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  position: sticky;
  top: 14px;
  z-index: 50;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 18, 18, 0.58);
  backdrop-filter: blur(18px) saturate(115%);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.24);
}

.brand {
  flex-shrink: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.nav-links,
.nav-actions,
.hero-actions,
.channel-logos,
.partners-list {
  display: flex;
  align-items: center;
}

.nav-links,
.nav-actions,
.hero-actions {
  gap: 10px;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 142px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-solid {
  color: #050505;
  background: linear-gradient(180deg, #f1f0ea 0%, #d7d5ce 100%);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.22);
}

.btn-outline {
  color: var(--text);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
}

.btn-ghost {
  color: var(--muted);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: transparent;
}

.btn-outline:hover,
.btn-ghost:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

main {
  width: min(calc(100% - 28px), var(--maxw));
  margin: 0 auto;
}

section {
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(420px, 0.96fr);
  gap: 34px;
  align-items: center;
  min-height: calc(100vh - 90px);
  padding: 70px 0 54px;
}

.hero-copy,
.hero-visual,
.channel-band,
.showcase-panel,
.outcome-card,
.case-story,
.voice-card,
.coverage-card,
.partners-panel,
.version-band,
.cta-panel,
.section-head,
.outcome-copy {
  position: relative;
  z-index: 1;
}

.eyebrow,
.mini-kicker,
.case-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: #d7d6d0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.hero h1,
.section-head h2,
.outcome-copy h2,
.partners-copy h2,
.cta-panel h2 {
  margin: 18px 0 0;
  font-family: "Songti SC", "Noto Serif SC", serif;
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1.02;
}

.hero h1 {
  font-size: clamp(52px, 7.6vw, 104px);
}

.hero-lead,
.section-copy,
.outcome-card p,
.case-copy p,
.voice-quote,
.coverage-card li,
.partners-copy p,
.cta-panel p {
  color: var(--muted);
}

.hero-lead {
  max-width: 640px;
  margin: 22px 0 0;
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  margin-top: 28px;
  flex-wrap: wrap;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.download-card,
.channel-band,
.showcase-panel,
.outcome-card,
.voice-card,
.coverage-card,
.partners-panel,
.cta-panel {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.download-card {
  padding: 16px 18px;
  border-radius: 20px;
}

.download-card strong,
.download-card span {
  display: block;
}

.download-card strong {
  font-size: 15px;
}

.download-card span {
  margin-top: 6px;
  color: var(--muted-2);
  font-size: 12px;
}

.hero-visual {
  min-height: 640px;
}

.visual-frame {
  position: absolute;
  inset: 54px 18px 54px 18px;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: var(--shadow);
  transform: rotate(-3deg);
}

.visual-frame img {
  height: 100%;
  object-fit: cover;
}

.visual-note {
  position: absolute;
  width: 220px;
  padding: 18px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(18, 18, 18, 0.68);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.22);
}

.visual-note span,
.visual-note strong,
.visual-note p {
  display: block;
}

.visual-note span {
  color: var(--muted-2);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.visual-note strong {
  margin-top: 10px;
  font-size: 24px;
}

.visual-note p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.visual-note-top {
  left: -6px;
  top: 22px;
}

.visual-note-bottom {
  right: 0;
  bottom: 18px;
}

.channel-band {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
  margin-bottom: 96px;
  padding: 24px 28px;
  border-radius: 28px;
}

.channel-copy h2 {
  font-size: clamp(28px, 4vw, 50px);
}

.channel-logos {
  flex-wrap: wrap;
  gap: 12px;
  align-content: flex-start;
}

.channel-logos span,
.partners-list span {
  padding: 14px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: #e3e2dc;
  font-size: 14px;
}

.showcase,
.outcome,
.cases,
.voices,
.coverage,
.partners,
.versions,
.cta {
  padding-bottom: 96px;
}

.section-head,
.outcome-copy,
.partners-copy {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-head h2,
.outcome-copy h2,
.partners-copy h2,
.cta-panel h2 {
  font-size: clamp(34px, 5vw, 68px);
}

.section-copy,
.partners-copy p,
.cta-panel p {
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.82;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
}

.showcase-panel {
  overflow: hidden;
  border-radius: var(--radius);
}

.panel-large,
.panel-image {
  min-height: 440px;
}

.panel-large img,
.panel-image img {
  height: 100%;
  object-fit: cover;
}

.panel-copy {
  padding: 28px 26px;
}

.panel-copy h3,
.outcome-card h3,
.case-copy h3,
.coverage-card h3 {
  margin: 16px 0 0;
  font-family: "Songti SC", "Noto Serif SC", serif;
  font-size: 34px;
  line-height: 1.16;
  letter-spacing: -0.04em;
}

.panel-copy p,
.outcome-card p,
.case-copy p,
.partners-copy p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
}

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

.outcome-card {
  padding: 26px 24px;
  border-radius: 26px;
}

.cases-layout {
  display: grid;
  gap: 20px;
}

.case-story {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.case-story.reverse {
  grid-template-columns: 0.95fr 1.05fr;
}

.case-story.reverse .case-image {
  order: 2;
}

.case-story.reverse .case-copy {
  order: 1;
}

.case-image {
  overflow: hidden;
  border-radius: 24px;
  border: 1px solid var(--line);
}

.case-image img {
  height: 100%;
  min-height: 320px;
  object-fit: cover;
}

.case-copy {
  padding: 10px 6px;
}

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

.voice-card {
  min-height: 300px;
  padding: 28px 24px;
  border-radius: 28px;
}

.voice-avatar {
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  font-size: 22px;
  font-weight: 700;
}

.voice-quote {
  margin: 22px 0 0;
  font-size: 18px;
  line-height: 1.8;
}

.voice-meta {
  margin-top: 26px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.voice-meta strong,
.voice-meta span {
  display: block;
}

.voice-meta strong {
  font-size: 14px;
}

.voice-meta span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.coverage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.coverage-card {
  padding: 28px 24px;
  border-radius: 28px;
}

.coverage-card ul {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.coverage-card li {
  padding: 10px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
  font-size: 14px;
}

.coverage-card li:last-child {
  border-bottom: 0;
}

.partners-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 30px;
  border-radius: 32px;
}

.partners-list {
  flex-wrap: wrap;
  gap: 12px;
  align-content: flex-start;
}

.version-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.version-item {
  padding: 22px 20px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(16px);
}

.version-item strong,
.version-item span {
  display: block;
}

.version-item strong {
  font-size: 14px;
}

.version-item span {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

.cta-panel {
  padding: 38px 34px;
  border-radius: 34px;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.reveal-in {
  opacity: 1;
  transform: none;
}

.nav.scrolled {
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
}

@media (max-width: 1080px) {
  .hero,
  .channel-band,
  .showcase-grid,
  .partners-panel {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 520px;
  }

  .download-grid,
  .outcome-grid,
  .voices-grid,
  .coverage-grid,
  .version-band {
    grid-template-columns: 1fr 1fr;
  }

  .case-story,
  .case-story.reverse {
    grid-template-columns: 1fr;
  }

  .case-story.reverse .case-image,
  .case-story.reverse .case-copy {
    order: initial;
  }
}

@media (max-width: 820px) {
  .nav {
    width: min(calc(100% - 16px), var(--maxw));
    padding: 12px 14px;
  }

  .nav-links {
    display: none;
  }

  main {
    width: min(calc(100% - 18px), var(--maxw));
  }

  .hero {
    padding: 56px 0 44px;
  }

  .hero h1 {
    font-size: clamp(42px, 13vw, 84px);
  }

  .hero-lead,
  .section-copy,
  .partners-copy p,
  .cta-panel p {
    font-size: 15px;
  }

  .showcase,
  .outcome,
  .cases,
  .voices,
  .coverage,
  .partners,
  .versions,
  .cta {
    padding-bottom: 76px;
  }
}

@media (max-width: 640px) {
  .nav-actions .btn-ghost {
    display: none;
  }

  .btn {
    min-width: 0;
    padding: 13px 16px;
    font-size: 13px;
  }

  .download-grid,
  .outcome-grid,
  .voices-grid,
  .coverage-grid,
  .version-band {
    grid-template-columns: 1fr;
  }

  .visual-frame {
    inset: 44px 4px 44px 4px;
    transform: none;
  }

  .visual-note {
    width: 180px;
    padding: 14px;
  }

  .visual-note strong {
    font-size: 20px;
  }

  .panel-copy,
  .outcome-card,
  .voice-card,
  .coverage-card,
  .partners-panel,
  .cta-panel,
  .case-story {
    padding: 22px 18px;
  }

  .panel-copy h3,
  .outcome-card h3,
  .case-copy h3,
  .coverage-card h3 {
    font-size: 28px;
  }

  .voice-quote {
    font-size: 17px;
  }
}