/* 规格照 · 假门落地页 — 移动优先 */
:root {
  --bg: #f7f4ef;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --line: #e8e2d8;
  --brand: #1f6b4a;
  --brand-dark: #155338;
  --accent: #c45c26;
  --accent-soft: #fff1e8;
  --ok: #1f6b4a;
  --radius: 14px;
  --shadow: 0 8px 28px rgba(26, 26, 26, 0.08);
  --max: 720px;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); }
img, canvas { max-width: 100%; display: block; }

.wrap { width: min(100% - 32px, var(--max)); margin: 0 auto; }

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: rgba(247, 244, 239, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 0; gap: 12px;
}
.brand { display: flex; flex-direction: column; gap: 2px; }
.brand-name { font-weight: 700; font-size: 18px; letter-spacing: 0.02em; }
.brand-tag { font-size: 12px; color: var(--muted); }
.topbar-price {
  background: var(--accent-soft); color: var(--accent);
  font-weight: 700; font-size: 13px;
  padding: 6px 10px; border-radius: 999px; white-space: nowrap;
}

/* 首屏 */
.hero { padding: 28px 0 12px; }
.hero h1 {
  margin: 0 0 10px; font-size: clamp(22px, 5.5vw, 30px);
  line-height: 1.3; letter-spacing: -0.01em;
}
.hero .price-hl { color: var(--accent); }
.hero-sub { margin: 0 0 20px; color: var(--muted); font-size: 15px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 18px;
}

.spec-label { font-size: 14px; font-weight: 600; margin-bottom: 10px; }
.spec-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
  margin-bottom: 16px;
}
.spec-btn {
  appearance: none; border: 1.5px solid var(--line); background: #fff;
  border-radius: 10px; padding: 10px 6px; font-size: 13px;
  font-family: inherit; cursor: pointer; color: var(--ink);
  transition: border-color .15s, background .15s, color .15s;
}
.spec-btn.active {
  border-color: var(--brand); background: #eaf6f0; color: var(--brand-dark);
  font-weight: 600;
}

.upload-zone {
  border: 1.5px dashed #cfc6b8; border-radius: 12px;
  background: #faf8f4; padding: 18px; text-align: center;
  cursor: pointer; margin-bottom: 14px; position: relative;
}
.upload-zone:hover, .upload-zone:focus-within { border-color: var(--brand); }
.upload-zone input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
}
.upload-hint { color: var(--muted); font-size: 13px; margin: 0; }
.upload-hint strong { color: var(--ink); }

.preview-box {
  display: none; margin: 0 auto 14px; max-width: 220px;
  border-radius: 10px; overflow: hidden; border: 1px solid var(--line);
  background: #ddd;
}
.preview-box.show { display: block; }
.preview-box canvas { width: 100%; height: auto; }
.preview-note {
  display: none; text-align: center; font-size: 12px; color: var(--muted);
  margin: -6px 0 14px;
}
.preview-note.show { display: block; }

.actions { display: flex; flex-direction: column; gap: 10px; }
.btn {
  appearance: none; border: none; border-radius: 12px;
  padding: 14px 16px; font-size: 16px; font-weight: 700;
  font-family: inherit; cursor: pointer; text-align: center;
  text-decoration: none; display: inline-block;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 6px 16px rgba(196, 92, 38, 0.28);
}
.btn-primary:hover { background: #a84c1e; }
.btn-secondary {
  background: #fff; color: var(--brand-dark);
  border: 1.5px solid var(--brand); font-weight: 600;
}
.btn-secondary:hover { background: #eaf6f0; }
.fineprint {
  margin: 10px 0 0; font-size: 12px; color: var(--muted); text-align: center;
}

/* 卖点 */
.section { padding: 28px 0; }
.section h2 {
  margin: 0 0 14px; font-size: 20px; letter-spacing: -0.01em;
}
.features {
  display: grid; gap: 10px;
}
.feature {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 14px 16px;
}
.feature h3 { margin: 0 0 6px; font-size: 15px; }
.feature p { margin: 0; font-size: 13px; color: var(--muted); }

/* 价格 / 预约说明 */
.price-card {
  background: linear-gradient(145deg, #fff, #fff8f3);
  border: 1px solid #f0d8c6;
}
.price-row {
  display: flex; align-items: baseline; gap: 8px; margin-bottom: 8px;
}
.price-num { font-size: 36px; font-weight: 800; color: var(--accent); }
.price-unit { color: var(--muted); font-size: 14px; }
.badge {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  font-size: 12px; font-weight: 700; padding: 4px 8px; border-radius: 6px;
  margin-bottom: 10px;
}

/* 表单 */
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px;
}
.form-group .req { color: var(--accent); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 12px 12px; border-radius: 10px;
  border: 1.5px solid var(--line); font-size: 15px; font-family: inherit;
  background: #fff; color: var(--ink);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(31, 107, 74, 0.12);
}
.form-group textarea { min-height: 80px; resize: vertical; }
.check-row {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px; margin: 4px 0 16px;
}
.check-row input { margin-top: 3px; width: 18px; height: 18px; accent-color: var(--brand); }
.form-msg {
  display: none; margin-top: 12px; padding: 12px; border-radius: 10px;
  font-size: 14px;
}
.form-msg.ok { display: block; background: #eaf6f0; color: var(--ok); }
.form-msg.err { display: block; background: #fff0ee; color: #a33; }

/* FAQ */
.faq details {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 12px 14px; margin-bottom: 8px;
}
.faq summary {
  cursor: pointer; font-weight: 600; font-size: 14px;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+"; display: inline-block; width: 1.2em; color: var(--brand);
}
.faq details[open] summary::before { content: "–"; }
.faq details p {
  margin: 10px 0 0; font-size: 13px; color: var(--muted);
}

/* 页脚 */
.footer {
  border-top: 1px solid var(--line);
  padding: 24px 0 40px; color: var(--muted); font-size: 12px;
}
.footer p { margin: 0 0 8px; }

@media (min-width: 640px) {
  .features { grid-template-columns: repeat(3, 1fr); }
  .actions { flex-direction: row; }
  .actions .btn { flex: 1; }
  .spec-grid { grid-template-columns: repeat(5, 1fr); }
}