:root {
  --ink: #1f1b16;
  --ink-2: #5c5346;
  --line: #e8e1d6;
  --paper: #fdfbf7;
  --card: #ffffff;
  --brand: #8d2b1f;      /* 枣红 */
  --brand-2: #b8452f;
  --leaf: #4a6b3a;
  --gold: #c98f2b;
  --radius: 14px;
  --bar-h: 68px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  /* 给底部常驻购买栏留位置 */
  padding-bottom: calc(var(--bar-h) + env(safe-area-inset-bottom, 0px));
}

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

a { color: var(--brand); }

.wrap { width: 100%; max-width: 720px; margin: 0 auto; padding: 0 18px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--brand); color: #fff; padding: 10px 16px; z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---------- 顶部 ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.logo { font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.logo span { color: var(--brand); }
.topbar nav a { font-size: 14px; color: var(--ink-2); text-decoration: none; }
.topbar nav a:hover, .topbar nav a:focus { color: var(--brand); text-decoration: underline; }

/* ---------- 首屏 ---------- */
.hero { padding: 34px 0 8px; }
.badge {
  display: inline-block; font-size: 12px; letter-spacing: 1px;
  color: var(--leaf); border: 1px solid var(--leaf);
  border-radius: 999px; padding: 3px 12px; margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(28px, 7vw, 42px);
  line-height: 1.25; margin: 0 0 10px;
}
.hero .sub { font-size: 16px; color: var(--ink-2); margin: 0 0 20px; }

.shot {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 30% 35%, #c4543c 0 12%, transparent 12.5%),
    radial-gradient(circle at 62% 28%, #a8371f 0 9%, transparent 9.5%),
    radial-gradient(circle at 48% 66%, #d06a4a 0 14%, transparent 14.5%),
    radial-gradient(circle at 78% 62%, #8d2b1f 0 8%, transparent 8.5%),
    linear-gradient(160deg, #f6efe2, #eadfc9);
  display: grid; place-items: center;
  color: #8a7d68; font-size: 14px; text-align: center; padding: 20px;
}

/* ---------- 价格卡 ---------- */
.buycard {
  margin: 22px 0 8px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px;
}
.price-row { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.price { font-size: 36px; font-weight: 800; color: var(--brand); }
.price small { font-size: 15px; font-weight: 500; color: var(--ink-2); }
.list-price { color: #a09684; text-decoration: line-through; font-size: 15px; }
.spec { margin: 6px 0 0; color: var(--ink-2); font-size: 15px; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; padding: 0; list-style: none; }
.tags li {
  font-size: 13px; background: #f4efe4; color: var(--ink-2);
  border-radius: 8px; padding: 5px 10px;
}

.notice {
  margin-top: 14px; font-size: 14px; color: #8a5a12;
  background: #fdf5e3; border: 1px solid #f0e0b8;
  border-radius: 10px; padding: 10px 12px;
}

/* ---------- 通用区块 ---------- */
section { padding: 30px 0; border-top: 1px solid var(--line); }
section h2 { font-size: 20px; margin: 0 0 14px; }
.muted { color: var(--ink-2); }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 520px) { .grid2 { grid-template-columns: 1fr; } }

.cell {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px;
}
.cell h3 { margin: 0 0 6px; font-size: 15px; }
.cell p { margin: 0; font-size: 14px; color: var(--ink-2); }

.steps { list-style: none; counter-reset: s; margin: 0; padding: 0; }
.steps li {
  counter-increment: s; position: relative;
  padding: 10px 0 10px 40px; font-size: 15px;
  border-bottom: 1px dashed var(--line);
}
.steps li:last-child { border-bottom: 0; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: 11px;
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: grid; place-items: center; font-size: 13px; font-weight: 700;
}

/* ---------- 表单 ---------- */
form { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
.req::after { content: " *"; color: var(--brand); }
.field input, .field select, .field textarea {
  width: 100%; padding: 11px 12px; font-size: 16px; /* 16px 防 iOS 聚焦缩放 */
  border: 1px solid #d9d1c3; border-radius: 10px;
  background: #fff; color: var(--ink); font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus,
button:focus-visible, a:focus-visible {
  outline: 3px solid var(--gold); outline-offset: 2px;
}
.field .hint { font-size: 13px; color: var(--ink-2); margin-top: 5px; }
.field.err input, .field.err select, .field.err textarea { border-color: var(--brand-2); }
.field .err-msg { display: none; font-size: 13px; color: var(--brand-2); margin-top: 5px; }
.field.err .err-msg { display: block; }

.qty { display: flex; align-items: center; gap: 10px; }
.qty button {
  width: 44px; height: 44px; font-size: 20px; line-height: 1;
  border: 1px solid #d9d1c3; background: #fff; border-radius: 10px;
  color: var(--ink); cursor: pointer;
}
.qty input { width: 84px; text-align: center; }

.summary {
  background: #faf6ee; border: 1px solid var(--line);
  border-radius: 12px; padding: 14px; margin: 4px 0 16px; font-size: 15px;
}
.summary div { display: flex; justify-content: space-between; padding: 3px 0; }
.summary .total { font-weight: 800; font-size: 18px; color: var(--brand); border-top: 1px dashed var(--line); margin-top: 6px; padding-top: 8px; }

.btn {
  display: block; width: 100%; padding: 15px;
  font-size: 17px; font-weight: 700; color: #fff;
  background: var(--brand); border: 0; border-radius: 12px; cursor: pointer;
}
.btn:hover { background: var(--brand-2); }
.btn[disabled] { background: #c3b9a8; cursor: not-allowed; }
.btn.ghost { background: #fff; color: var(--brand); border: 1px solid var(--brand); }

.form-alert {
  display: none; margin-bottom: 14px; padding: 11px 12px;
  border-radius: 10px; font-size: 14px;
  background: #fdecea; border: 1px solid #f5c6c0; color: #8c2a1c;
}
.form-alert.on { display: block; }

/* ---------- 下单成功 ---------- */
.done { display: none; text-align: center; padding: 10px 0; }
.done.on { display: block; }
.done .no {
  font-size: 24px; font-weight: 800; letter-spacing: 1px;
  color: var(--brand); margin: 8px 0;
  user-select: all;
}
.pay-box {
  text-align: left; background: #faf6ee; border: 1px solid var(--line);
  border-radius: 12px; padding: 14px; margin: 14px 0; font-size: 15px;
}

/* ---------- 底部常驻购买栏 ---------- */
.stickybar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
  height: calc(var(--bar-h) + env(safe-area-inset-bottom, 0px));
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: rgba(255, 255, 255, .96);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.stickybar .inner {
  height: var(--bar-h); max-width: 720px; margin: 0 auto; padding: 0 18px;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.stickybar .p { font-size: 20px; font-weight: 800; color: var(--brand); }
.stickybar .p small { font-size: 13px; font-weight: 500; color: var(--ink-2); }
.stickybar a {
  flex: 0 0 auto; background: var(--brand); color: #fff;
  text-decoration: none; font-weight: 700; font-size: 16px;
  padding: 12px 26px; border-radius: 999px;
}

footer { padding: 26px 0 34px; font-size: 13px; color: var(--ink-2); border-top: 1px solid var(--line); }
footer p { margin: 4px 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}