:root {
  --board: #f3efe4;
  --ink: #2c2a24;
  --chalk: #3d5a80;
  --mute: #6b675c;
  --line: #d8d1c2;
  --white: #fffdf7;
  --mark: #c45c26;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Courier New", "KaiTi", "STKaiti", "Microsoft YaHei", serif;
  color: var(--ink);
  background: var(--board);
  line-height: 1.65;
}
img { max-width:100%;height:auto; display: block; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1040px, calc(100% - 40px)); margin-inline: auto; }
nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--board);
  border-bottom: 1px dashed var(--ink);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 60px;
}
.brand { font-weight: 700; }
.links {
  display: flex;
  gap: 20px;
  font-size: 0.92rem;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid var(--ink);
  padding: 8px 16px;
  background: transparent;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  font-weight: 650;
}
.button:hover { background: var(--ink); color: var(--board); }
.ghost {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-bottom: 1.5px solid var(--ink);
  font-family: "PingFang SC", sans-serif;
}
.hero { padding: 56px 0 48px; }
.kicker {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: var(--mark);
  margin-bottom: 10px;
}
.hero h1, .page-head h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.25;
  max-width: 14em;
}
.lead, .line {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  margin: 12px 0;
}
.line { max-width: 28em; }
.board {
  width: min(420px, 100%);
  margin: 28px 0;
  padding: 24px;
  border: 2px solid var(--ink);
  background:
    repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(44,42,36,0.06) 28px);
}
.layer {
  border: 1.5px dashed var(--chalk);
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}
.layer.front { background: rgba(255,253,247,0.7); }
.layer.back { border-style: solid; color: var(--chalk); }
.layer span { font-size: 0.85rem; }
.layer b { font-size: 1.6rem; }
.arrow { text-align: center; padding: 8px 0; color: var(--mark); font-size: 1.4rem; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.section { padding: 80px 0; }
.head { margin-bottom: 28px; max-width: 38em; }
.head p, .card p, .section p, details, footer, .person, .scene, .button, .links {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.grid6, .cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.card, .download-card {
  background: var(--white);
  border: 1.5px solid var(--ink);
  padding: 18px;
}
.icon { color: var(--mark); margin-bottom: 6px; }
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  align-items: center;
}
.split img, .shot img, .cta img {
  width: 100%;
  object-fit: cover;
  border: 1.5px solid var(--ink);
}
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 16px 0 20px;
}
.scene {
  border: 1.5px dashed var(--ink);
  padding: 10px 12px;
  display: flex;
  gap: 8px;
  background: var(--white);
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.review {
  background: var(--white);
  border-left: 3px solid var(--chalk);
  padding: 16px;
}
.person { margin-top: 12px; color: var(--mute); display: flex; flex-direction: column; }
.visual { padding: 0 0 80px; }
.metrics { display: flex; gap: 24px; margin: 18px 0; }
.metrics b { display: block; font-size: 1.4rem; }
.metrics small { font-family: "PingFang SC", sans-serif; color: var(--mute); }
.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 32px;
}
details { border-bottom: 1px dashed var(--ink); padding: 12px 0; }
summary { cursor: pointer; font-weight: 700; font-family: "PingFang SC", sans-serif; }
details p { margin-top: 8px; color: var(--mute); }
.cta {
  border-top: 2px solid var(--ink);
  padding: 40px 0;
}
.cta-in {
  display: grid;
  grid-template-columns: 0.7fr 1.1fr auto;
  gap: 24px;
  align-items: center;
}
.cta img { height: 120px; object-fit: cover; }
footer {
  background: var(--ink);
  color: #ddd6c8;
  padding: 40px 0 20px;
  font-family: "PingFang SC", sans-serif;
}
.footer {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 22px;
  margin-bottom: 22px;
}
.footer .brand { color: var(--board); }
.footer h4 { color: #e8c4a8; margin-bottom: 8px; }
.footer a { display: block; margin: 6px 0; }
.copy { border-top: 1px solid #4a463c; padding-top: 12px; font-size: 0.82rem; }
.page-head { padding: 48px 0 8px; }
.help-layout {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
}
.side a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px dashed var(--ink);
  font-family: "PingFang SC", sans-serif;
}
.article { margin-bottom: 36px; }
.article .shot { margin: 14px 0; }
.policy { margin-top: 14px; padding: 14px; background: var(--white); border: 1.5px solid var(--ink); }
@media (max-width: 900px) {
  .grid6, .cards, .review-grid, .split, .faq-layout, .footer, .help-layout, .cta-in {
    grid-template-columns: 1fr;
  }
  .links { display: none; }
}
@media (max-width: 640px) {
  .scene-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}}