:root {
  --db-bg: #f4efe6;
  --db-ink: #1a1a1a;
  --db-panel: #fffdf8;
  --db-accent: #ff5a36;
  --db-accent-2: #2dd4a8;
  --db-muted: #6b6560;
  --db-line: #1a1a1a;
  --db-grid: rgba(26, 26, 26, 0.07);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--db-ink);
  background: var(--db-bg);
  font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas, "PingFang SC", "Microsoft YaHei", monospace;
  line-height: 1.55;
}

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

.page-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--db-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--db-grid) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: 0.9;
}

.site-header {
  max-width: 1080px;
  margin: 0 auto;
  padding: 20px 20px 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border: 2px solid var(--db-line);
  box-shadow: 3px 3px 0 var(--db-line);
  background: var(--db-panel);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-mark--sm {
  width: 36px;
  height: 36px;
  box-shadow: 2px 2px 0 var(--db-line);
}

.bean-grid {
  position: relative;
  width: 28px;
  height: 28px;
}

.brand-mark--sm .bean-grid {
  width: 22px;
  height: 22px;
}

.c {
  position: absolute;
  width: 33.33%;
  height: 33.33%;
  border: 0.5px solid rgba(0, 0, 0, 0.15);
}
.c1 { left: 0; top: 0; background: #ff5a36; }
.c2 { left: 33.33%; top: 0; background: #ff8a5c; }
.c3 { left: 66.66%; top: 0; background: #ffd23f; }
.c4 { left: 0; top: 33.33%; background: #2dd4a8; }
.c5 { left: 33.33%; top: 33.33%; background: #ff8a5c; }
.c6 { left: 66.66%; top: 33.33%; background: #5b8def; }
.c7 { left: 0; top: 66.66%; background: #a855f7; }
.c8 { left: 33.33%; top: 66.66%; background: #ff5a36; }
.c9 { left: 66.66%; top: 66.66%; background: #1a1a1a; }

.eye {
  position: absolute;
  width: 14%;
  height: 14%;
  background: #1a1a1a;
  border-radius: 1px;
  top: 38%;
}
.e1 { left: 28%; }
.e2 { left: 58%; }

.brand-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.brand-title span {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--db-muted);
  margin-left: 4px;
}
.brand-sub {
  margin: 2px 0 0;
  font-size: 0.8rem;
  color: var(--db-muted);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.85rem;
  font-weight: 700;
}
.nav a { color: var(--db-ink); }
.nav a:hover { color: var(--db-accent); }

.hero {
  max-width: 1080px;
  margin: 12px auto 0;
  padding: 12px 20px 40px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: start;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  border: 2px solid var(--db-line);
  background: var(--db-panel);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.hero-copy h2 {
  margin: 0 0 14px;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.lead {
  margin: 0 0 22px;
  max-width: 34em;
  color: var(--db-muted);
  font-size: 0.95rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.hint {
  margin: 0;
  font-size: 0.75rem;
  color: var(--db-muted);
}

.px-btn {
  display: inline-block;
  border: 3px solid var(--db-line);
  box-shadow: 3px 3px 0 var(--db-line);
  background: var(--db-panel);
  color: var(--db-ink);
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 10px 16px;
  font-size: 0.9rem;
  text-decoration: none;
  cursor: default;
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
.px-btn:hover {
  text-decoration: none;
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--db-line);
}
.px-btn-primary {
  background: var(--db-accent);
  color: #fff;
}

.px-panel {
  border: 3px solid var(--db-line);
  box-shadow: 4px 4px 0 var(--db-line);
  background: var(--db-panel);
}

.phone {
  justify-self: end;
  width: min(100%, 340px);
  border: 3px solid var(--db-line);
  box-shadow: 8px 8px 0 var(--db-line);
  background: var(--db-bg);
  overflow: hidden;
  animation: rise 0.7s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

.phone-bar {
  background: var(--db-bg);
  border-bottom: 2px solid rgba(26, 26, 26, 0.12);
  text-align: center;
  font-size: 0.8rem;
  font-weight: 800;
  padding: 10px 8px 8px;
}

.phone-body {
  padding: 12px;
}

.mini-brand {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}
.mini-title {
  font-weight: 800;
  font-size: 0.95rem;
}
.mini-title span {
  font-size: 0.62rem;
  color: var(--db-muted);
  font-weight: 600;
}
.mini-sub {
  font-size: 0.68rem;
  color: var(--db-muted);
  margin-top: 2px;
}

.chips {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}
.chips-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }

.chip {
  flex: 1;
  border: 2px solid var(--db-line);
  background: var(--db-bg);
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 7px 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.chip b { font-size: 0.78rem; }
.chip small { font-size: 0.58rem; opacity: 0.8; font-weight: 600; }
.chip-on {
  background: var(--db-accent);
  color: #fff;
}

.phone-body .px-panel {
  padding: 10px;
  margin-bottom: 10px;
  box-shadow: 3px 3px 0 var(--db-line);
}

.panel-label {
  font-size: 0.72rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.fake-textarea {
  border: 2px solid var(--db-line);
  background: var(--db-bg);
  min-height: 64px;
  padding: 8px;
  font-size: 0.72rem;
  color: var(--db-muted);
  margin-bottom: 10px;
}

.mini-btn {
  width: 100%;
  text-align: center;
  font-size: 0.78rem;
  padding: 9px 8px;
  box-shadow: 2px 2px 0 var(--db-line);
}
.mini-btn.wide { margin-top: 4px; margin-bottom: 4px; }

.panel-tip {
  margin: 8px 0 0;
  font-size: 0.62rem;
  color: var(--db-muted);
  line-height: 1.45;
}

.phone-tab {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 3px solid var(--db-line);
  background: var(--db-panel);
}
.phone-tab span {
  text-align: center;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 10px 4px;
  color: var(--db-muted);
}
.phone-tab .tab-on {
  color: var(--db-accent);
}

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px;
}

.section-title {
  margin: 0 0 8px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.section-desc {
  margin: 0 0 18px;
  color: var(--db-muted);
  font-size: 0.9rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.card {
  padding: 16px;
}
.card h4 {
  margin: 0 0 8px;
  font-size: 1rem;
}
.card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--db-muted);
}

.steps {
  margin: 0;
  padding-left: 1.2em;
  color: var(--db-ink);
  font-size: 0.92rem;
}
.steps li { margin-bottom: 8px; }

.note {
  margin: 16px 0 0;
  font-size: 0.8rem;
  color: var(--db-muted);
}

.about-box {
  padding: 18px 20px;
  max-width: 720px;
}
.about-box p {
  margin: 0 0 10px;
  font-size: 0.9rem;
}
.about-box p:last-child { margin-bottom: 0; }

.site-footer {
  max-width: 1080px;
  margin: 20px auto 0;
  padding: 28px 20px 40px;
  border-top: 3px solid var(--db-line);
  text-align: center;
  font-size: 0.78rem;
  color: var(--db-muted);
}
.site-footer p { margin: 0 0 8px; }
.beian a { color: var(--db-muted); }
.footer-links a { color: var(--db-muted); }

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .phone {
    justify-self: center;
  }
  .cards {
    grid-template-columns: 1fr;
  }
}