:root {
  --bg: #08111f;
  --panel: rgba(10, 20, 34, 0.88);
  --panel-soft: rgba(255, 255, 255, 0.04);
  --line: rgba(255, 255, 255, 0.08);
  --text-main: #f7f9fc;
  --text-soft: #9aa7b9;
  --accent: #ff7a1a;
  --accent-deep: #ff5a00;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top, rgba(255, 122, 26, 0.18), transparent 22%),
    linear-gradient(180deg, #08111f 0%, #050b14 100%);
}

a {
  color: inherit;
}

.page-shell {
  width: min(680px, 100%);
}

.download-card,
.content-card,
.site-footer {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.download-card {
  padding: 36px;
}

.content-card {
  margin-top: 14px;
  padding: 32px 36px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
}

.eyebrow,
.section-kicker,
.download-item b,
.hero-actions a {
  font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
}

.eyebrow,
.section-kicker {
  margin: 0 0 8px;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--text-soft);
}

h1 {
  margin: 0;
  font-size: clamp(2.4rem, 7vw, 3.6rem);
  line-height: 1;
}

.hero-text,
.hint,
.info-grid span,
.download-item span,
.site-footer p,
.site-footer span {
  color: var(--text-soft);
}

.hero-text {
  margin: 24px 0 0;
  font-size: 1rem;
  line-height: 1.8;
}

.status-banner {
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 122, 26, 0.24);
  border-radius: 16px;
  background: rgba(255, 122, 26, 0.08);
  color: #ffd3b3;
  font-size: 0.94rem;
  line-height: 1.6;
}

.hero-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 28px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 20px;
  border-radius: 18px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  box-shadow: 0 16px 36px rgba(255, 90, 0, 0.28);
}

.secondary-button {
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.primary-button:hover,
.secondary-button:hover,
.download-item:hover {
  transform: translateY(-2px);
}

.is-disabled {
  cursor: not-allowed;
  opacity: 0.58;
  box-shadow: none;
}

.is-disabled:hover {
  transform: none;
}

.hint {
  margin: 16px 0 0;
  font-size: 0.92rem;
}

.quick-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.quick-nav a {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-soft);
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.9rem;
}

.quick-nav a:hover {
  color: var(--text-main);
  border-color: rgba(255, 122, 26, 0.35);
}

.section-copy h2,
.content-block h3,
.faq-item h3 {
  margin: 0;
}

.section-copy p:last-child,
.faq-item p {
  margin-bottom: 0;
}

.section-copy p:last-child {
  margin-top: 16px;
  line-height: 1.8;
  color: var(--text-soft);
}

.compact-copy {
  margin-bottom: 20px;
}

.info-copy-grid strong {
  color: var(--text-main);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.content-block,
.faq-item {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--panel-soft);
}

.content-block {
  padding: 22px;
}

.content-block ul,
.content-block ol {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--text-soft);
  line-height: 1.8;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 20px 22px;
}

.faq-item p {
  margin-top: 10px;
  color: var(--text-soft);
  line-height: 1.8;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.info-grid article,
.download-item {
  border: 1px solid var(--line);
  background: var(--panel-soft);
}

.info-grid article {
  padding: 18px;
  border-radius: 20px;
}

.info-grid span,
.info-grid strong {
  display: block;
}

.info-grid strong {
  margin-top: 8px;
  font-size: 1.05rem;
}

.download-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.download-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px;
  border-radius: 20px;
  text-decoration: none;
}

.download-item strong,
.download-item b {
  display: block;
}

.download-item span {
  display: block;
  margin-top: 6px;
}

.download-item b {
  color: var(--accent);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  padding: 16px 20px;
}

.site-footer p,
.site-footer span {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  body {
    padding: 14px;
  }

  .download-card,
  .content-card,
  .site-footer {
    border-radius: 22px;
  }

  .download-card,
  .content-card {
    padding: 24px;
  }

  .brand-row,
  .hero-actions,
  .info-grid,
  .content-grid,
  .download-item,
  .site-footer {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-actions {
    display: grid;
  }

  .quick-nav {
    gap: 8px;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }
}