:root {
  --paper: #f7f2e8;
  --mist: #edf3fb;
  --ink: #22242c;
  --muted: #667089;
  --line: rgba(61, 74, 104, 0.12);
  --accent: #395cb7;
  --accent-soft: rgba(57, 92, 183, 0.12);
  --panel: rgba(255, 255, 255, 0.72);
  --shadow: 0 18px 40px rgba(39, 52, 89, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  background:
    radial-gradient(circle at top left, rgba(236, 206, 153, 0.5), transparent 28%),
    radial-gradient(circle at top right, rgba(117, 147, 216, 0.24), transparent 32%),
    linear-gradient(180deg, #fcfaf4 0%, #f8f8fb 100%);
  color: var(--ink);
}

body {
  margin: 0;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  background: rgba(47, 59, 92, 0.06);
  border-radius: 8px;
  padding: 0.14rem 0.42rem;
}

.page-shell {
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.hero,
.subpage-header {
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.62)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0));
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero {
  padding: 24px;
}

.hero-topline,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.5fr minmax(240px, 0.8fr);
  gap: 24px;
  align-items: center;
  margin-top: 20px;
}

.hero h1,
.subpage-header h1,
.content-card h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Georgia, serif;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 4.8rem);
  line-height: 0.95;
  max-width: 10ch;
}

.lead {
  max-width: 44rem;
  margin: 18px 0 0;
  font-size: 1.08rem;
  color: #31364a;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button-primary {
  background: linear-gradient(180deg, #3456b2 0%, #29448e 100%);
  color: #fff;
  box-shadow: 0 12px 30px rgba(41, 68, 142, 0.28);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  border-color: var(--line);
}

.feature-list,
.bullet-list {
  margin: 18px 0 0;
  padding-left: 18px;
}

.feature-list li,
.bullet-list li {
  margin: 8px 0;
}

.hero-card,
.content-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 28px;
  display: grid;
  place-items: center;
  min-height: 320px;
  background:
    radial-gradient(circle at top, rgba(57, 92, 183, 0.08), transparent 40%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.68));
}

.app-icon {
  width: clamp(128px, 22vw, 220px);
  border-radius: 24%;
  box-shadow: 0 22px 40px rgba(46, 58, 92, 0.18);
}

.app-meta {
  margin-top: 18px;
  text-align: center;
}

.app-name {
  font-size: 1.2rem;
  font-weight: 700;
}

.app-subtitle {
  margin-top: 8px;
  color: var(--muted);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.content-card {
  padding: 22px;
}

.content-card h2 {
  margin-top: 10px;
  font-size: 1.7rem;
}

.url-list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.subpage-header {
  padding: 22px 24px 18px;
}

.back-link {
  display: inline-block;
  margin-bottom: 10px;
  font-weight: 600;
}

.subpage-header h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.subpage-header p {
  margin: 8px 0 0;
  color: var(--muted);
}

.single-column {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.contact-line {
  font-size: 1.08rem;
  font-weight: 700;
}

.code-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.code-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: "SF Mono", "Menlo", "Consolas", monospace;
  font-size: 0.94rem;
}

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

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 24px 4px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 14px;
}

@media (max-width: 920px) {
  .hero-grid,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100vw - 20px, 1120px);
    padding-top: 10px;
  }

  .hero,
  .subpage-header,
  .content-card,
  .hero-card {
    border-radius: 20px;
  }

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