:root {
  color-scheme: dark;
  --page-bg: #0c0c0e;
  --surface: #121215;
  --surface-soft: rgba(255, 255, 255, 0.06);
  --surface-line: rgba(255, 255, 255, 0.12);
  --text: #f5f2ed;
  --muted: rgba(245, 242, 237, 0.72);
  --muted-soft: rgba(245, 242, 237, 0.56);
  --brand: #e9151a;
  --brand-dark: #bf1115;
  --bone: #e9dfd3;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.28);
  --container: min(1280px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% -10%, rgba(233, 21, 26, 0.16), transparent 28%),
    radial-gradient(circle at 85% 0%, rgba(255, 255, 255, 0.08), transparent 22%),
    #0b0b0d;
}

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

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

#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
}

.topbar,
.hero,
.benefits-band,
.experience-band,
.download-band,
.footer {
  position: relative;
  z-index: 1;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 20px 0;
  z-index: 5;
}

.section-inner,
.footer-inner,
.hero-inner {
  width: var(--container);
  margin: 0 auto;
}

.topbar-inner {
  width: calc(100vw - 48px);
  margin: 0 auto;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-radius: 999px;
  background: transparent;
  border: 0;
  backdrop-filter: none;
  box-shadow: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark img {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(233, 21, 26, 0.18);
}

.brand-mark strong,
.footer strong {
  display: block;
  font-size: 18px;
  font-weight: 700;
}

.brand-mark span,
.footer span {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  color: var(--muted-soft);
}

.topbar-nav {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.topbar-nav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  transition: color 180ms ease, opacity 180ms ease;
}

.topbar-nav a:hover {
  color: #fff;
  opacity: 0.92;
}

.hero {
  min-height: 100vh;
  padding: 116px 0 48px;
  overflow: hidden;
}

.hero-media,
.hero-overlay,
.hero-glow {
  position: absolute;
  inset: 0;
}

.hero-media {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(7, 7, 8, 0.88) 0%, rgba(7, 7, 8, 0.66) 34%, rgba(7, 7, 8, 0.3) 62%, rgba(7, 7, 8, 0.18) 100%),
    linear-gradient(180deg, rgba(7, 7, 8, 0.16) 0%, rgba(7, 7, 8, 0.5) 100%);
}

.hero-glow {
  filter: blur(90px);
  opacity: 0.26;
}

.hero-glow-left {
  inset: auto auto 10% -8%;
  width: 360px;
  height: 360px;
  background: rgba(233, 21, 26, 0.48);
}

.hero-glow-right {
  inset: 8% 6% auto auto;
  width: 260px;
  height: 260px;
  background: rgba(255, 255, 255, 0.18);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 0.58fr);
  align-items: center;
  gap: 48px;
  min-height: calc(100vh - 164px);
}

.hero-copy {
  max-width: 720px;
}

.eyebrow,
.section-kicker,
.proof-label,
.panel-title {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.eyebrow {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
}

.hero-copy h1 {
  margin: 22px 0 18px;
  font-size: clamp(54px, 7vw, 94px);
  line-height: 0.94;
  letter-spacing: 0;
}

.hero-copy h1 span {
  display: block;
  margin-top: 18px;
  max-width: 640px;
  font-size: clamp(24px, 2.8vw, 40px);
  font-weight: 600;
  line-height: 1.08;
  color: var(--bone);
}

.hero-summary {
  max-width: 640px;
  margin: 0;
  font-size: 18px;
  line-height: 1.88;
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 0 28px;
  border-radius: 18px;
  font-size: 16px;
  font-weight: 600;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.primary-button {
  color: #fff;
  background: var(--brand);
  box-shadow: 0 18px 34px rgba(233, 21, 26, 0.24);
}

.primary-button:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.secondary-button {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
}

.secondary-button:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-1px);
}

.hero-signature {
  margin: 26px 0 0;
  font-size: 17px;
  line-height: 1.7;
  color: rgba(245, 242, 237, 0.76);
}

.hero-proof {
  align-self: center;
  justify-self: end;
  width: min(100%, 360px);
  padding: 26px;
  border-radius: 30px;
  background: transparent;
  border: 0;
  backdrop-filter: none;
  box-shadow: none;
}

.proof-label,
.panel-title {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.proof-list,
.visual-panel ol {
  margin: 18px 0 0;
  padding-left: 18px;
}

.proof-list li,
.visual-panel li {
  margin-bottom: 12px;
  line-height: 1.76;
  color: var(--muted);
}

.proof-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.proof-tags span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 0;
  color: #fff;
  font-size: 13px;
}

.benefits-band,
.experience-band,
.download-band {
  padding: 96px 0;
}

.benefits-band {
  background:
    linear-gradient(180deg, rgba(10, 10, 12, 0.98) 0%, rgba(14, 14, 16, 1) 100%);
}

.section-heading {
  max-width: 760px;
}

.section-kicker {
  color: var(--brand);
  background: rgba(233, 21, 26, 0.08);
  border: 1px solid rgba(233, 21, 26, 0.12);
}

.section-heading h2,
.experience-copy h2,
.download-copy h2 {
  margin: 18px 0 14px;
  font-size: clamp(34px, 4vw, 54px);
  line-height: 1.08;
}

.section-heading p,
.experience-copy p,
.download-copy p {
  margin: 0;
  max-width: 760px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--muted);
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
  margin-top: 54px;
}

.benefit-item {
  padding-right: 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.benefit-item:last-child {
  border-right: 0;
}

.benefit-index {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}

.benefit-item h3 {
  margin: 0 0 14px;
  font-size: 28px;
  line-height: 1.16;
}

.benefit-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.86;
}

.experience-band {
  background: linear-gradient(180deg, #17171a 0%, #111113 100%);
}

.experience-layout,
.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 420px);
  gap: 40px;
  align-items: center;
}

.experience-points {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.experience-points div {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.experience-points strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.experience-points span {
  color: var(--muted);
  line-height: 1.8;
}

.experience-visual {
  display: flex;
  justify-content: flex-end;
}

.visual-panel {
  width: min(100%, 390px);
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.03) 100%);
  box-shadow: var(--shadow);
}

.download-band {
  background:
    radial-gradient(circle at 80% 30%, rgba(233, 21, 26, 0.14), transparent 30%),
    linear-gradient(180deg, #111113 0%, #0a0a0b 100%);
}

.download-meta {
  display: grid;
  gap: 14px;
}

.download-meta div {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
}

.download-meta dt {
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--muted-soft);
}

.download-meta dd {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.footer {
  padding: 24px 0 32px;
  background: #0a0a0b;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer p {
  margin: 0;
  font-size: 14px;
  color: var(--muted-soft);
}

@media (max-width: 1100px) {
  .hero-inner,
  .experience-layout,
  .download-layout,
  .benefit-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    min-height: auto;
    padding-top: 96px;
  }

  .hero-proof,
  .experience-visual {
    justify-self: stretch;
    width: 100%;
  }

  .benefit-item {
    padding-right: 0;
    padding-bottom: 22px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .benefit-item:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 760px) {
  :root {
    --container: min(100vw - 24px, 100%);
  }

  .topbar {
    padding: 12px 0;
  }

  .topbar-inner {
    width: calc(100vw - 24px);
    padding: 12px 14px;
    border-radius: 22px;
  }

  .brand-mark {
    gap: 10px;
  }

  .brand-mark img {
    width: 34px;
    height: 34px;
    border-radius: 12px;
  }

  .topbar-nav {
    display: none;
  }

  .hero {
    padding-top: 92px;
    min-height: auto;
  }

  .hero-inner {
    gap: 24px;
    padding-top: 80px;
  }

  .hero-copy h1 {
    font-size: 44px;
  }

  .hero-copy h1 span {
    font-size: 24px;
  }

  .hero-summary,
  .section-heading p,
  .experience-copy p,
  .download-copy p {
    font-size: 16px;
  }

  .hero-proof,
  .visual-panel {
    padding: 22px;
    border-radius: 24px;
  }

  .benefits-band,
  .experience-band,
  .download-band {
    padding: 72px 0;
  }

  .section-heading h2,
  .experience-copy h2,
  .download-copy h2 {
    font-size: 32px;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}