:root {
  color-scheme: dark;
  --bg: #111111;
  --panel: #1b1a18;
  --panel-strong: #24221e;
  --text: #f4f0e8;
  --muted: #b9afa2;
  --soft: #7e7569;
  --line: rgba(244, 240, 232, 0.12);
  --accent: #d94b38;
  --accent-strong: #f06146;
  --gold: #d8a84e;
  --green: #42b883;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 78% 12%, rgba(217, 75, 56, 0.20), transparent 30rem),
    radial-gradient(circle at 10% 30%, rgba(216, 168, 78, 0.12), transparent 26rem),
    linear-gradient(180deg, #15120f 0%, var(--bg) 42%, #0d0d0d 100%);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
}

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

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 72px);
  background: rgba(17, 17, 17, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero,
.section,
.footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 80px 0 64px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(44px, 7vw, 78px);
  line-height: 1.06;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h1 span {
  display: block;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
  letter-spacing: 0;
}

.lead {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 19px;
  overflow-wrap: anywhere;
}

.hero-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-weight: 800;
}

.button.primary {
  border-color: rgba(240, 97, 70, 0.65);
  background: linear-gradient(180deg, var(--accent-strong), var(--accent));
  color: white;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.button:hover {
  transform: translateY(-1px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 540px;
  margin: 34px 0 0;
}

.hero-stats div {
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  border-radius: 8px;
}

.hero-stats dt {
  font-size: 28px;
  font-weight: 900;
  color: var(--text);
}

.hero-stats dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-panel {
  border: 1px solid rgba(216, 168, 78, 0.25);
  background: linear-gradient(180deg, rgba(36, 34, 30, 0.96), rgba(24, 23, 21, 0.96));
  box-shadow: var(--shadow);
  border-radius: 8px;
  overflow: hidden;
  max-width: 100%;
}

.panel-header {
  display: flex;
  gap: 8px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.panel-header span {
  width: 10px;
  height: 10px;
  background: var(--soft);
  border-radius: 50%;
}

.macro-preview {
  padding: 18px;
}

.macro-row {
  display: grid;
  grid-template-columns: 86px 1fr 58px;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  border-radius: 8px;
}

.macro-row + .macro-row {
  margin-top: 10px;
}

.macro-row span,
.macro-row em {
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
  min-width: 0;
}

.macro-row.on em {
  color: var(--green);
}

.section {
  padding: 72px 0;
}

.section-heading {
  max-width: 740px;
  margin-bottom: 30px;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 18px;
}

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

.feature-grid article,
.detail-card,
.download,
.donate {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  border-radius: 8px;
}

.feature-grid article {
  min-height: 188px;
  padding: 24px;
}

.feature-grid p,
.detail-card span,
.download p,
.footer {
  color: var(--muted);
}

.shot-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items: start;
}

figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

figure img {
  width: 100%;
  border-radius: 6px;
}

figcaption {
  padding: 12px 4px 4px;
  color: var(--muted);
  font-size: 14px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps li {
  padding: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.045);
  border-radius: 8px;
}

.steps span {
  display: grid;
  width: 36px;
  height: 36px;
  margin-bottom: 18px;
  place-items: center;
  border-radius: 8px;
  background: rgba(217, 75, 56, 0.22);
  color: var(--accent-strong);
  font-weight: 900;
}

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

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

.detail-card {
  padding: 24px;
}

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

.detail-card li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

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

.detail-card strong {
  color: var(--text);
}

.download,
.donate {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin-bottom: 72px;
  padding: 30px;
}

.download h2,
.donate h2 {
  font-size: clamp(26px, 3vw, 36px);
}

.donate {
  margin-top: -42px;
}

.donate-copy {
  max-width: 760px;
}

.donate-code {
  width: 190px;
  padding: 10px;
  box-shadow: none;
}

.donate-code img {
  aspect-ratio: 1;
  object-fit: cover;
}

.donate-code figcaption {
  text-align: center;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px 0 40px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.footer p {
  margin: 0;
}

.footer a {
  color: var(--gold);
}

@media (max-width: 980px) {
  .hero,
  .download,
  .donate {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .hero-panel {
    max-width: 560px;
  }

  .feature-grid,
  .steps,
  .details,
  .shot-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 20px;
  }

  .nav {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    width: 100%;
    gap: 10px;
    font-size: 13px;
  }

  .nav a {
    text-align: center;
  }

  .hero,
  .section,
  .footer {
    width: calc(100% - 28px);
    max-width: 1180px;
  }

  .hero {
    padding: 40px 0;
  }

  h1 {
    font-size: 38px;
    line-height: 1.12;
  }

  .hero-stats,
  .feature-grid,
  .steps,
  .details,
  .shot-grid {
    grid-template-columns: 1fr;
  }

  .macro-row {
    grid-template-columns: 72px minmax(0, 1fr) 44px;
    gap: 8px;
    padding: 10px;
  }

  .macro-row strong,
  .macro-row span,
  .macro-row em {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .download-actions,
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .donate-code {
    width: min(220px, 100%);
  }

  .footer {
    flex-direction: column;
  }
}