:root {
  --bg: #f3efe8;
  --card: #fffdf9;
  --ink: #221f1a;
  --muted: #948c7c;
  --line: #e7e0d1;
  --gold: #b08d57;
  --gold-soft: #d8c39a;
  --espresso: #221d18;
  --ok: #5b7a5b;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  padding-bottom: 48px;
  line-height: 1.6;
}

.serif {
  font-family: "Songti SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
}

/* ===== 顶部 Hero ===== */
.topbar {
  background:
    radial-gradient(120% 90% at 50% 0%, #2f2922 0%, #211c17 60%, #1a1611 100%);
  color: #f3ead9;
  padding: 40px 20px 38px;
  text-align: center;
  position: relative;
}
.topbar::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.7;
}
.brand-en {
  font-size: 11px;
  letter-spacing: 5px;
  color: var(--gold-soft);
  opacity: 0.85;
  margin-bottom: 12px;
  font-weight: 500;
}
.brand {
  font-family: "Songti SC", "Noto Serif SC", Georgia, serif;
  font-size: 27px;
  font-weight: 600;
  letter-spacing: 3px;
  color: #fbf3e4;
}
.brand-line {
  width: 42px;
  height: 1px;
  background: var(--gold);
  margin: 16px auto;
  position: relative;
}
.brand-line::before,
.brand-line::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 4px; height: 4px;
  background: var(--gold);
  border-radius: 50%;
  transform: translateY(-50%) rotate(45deg);
}
.brand-line::before { left: -10px; }
.brand-line::after { right: -10px; }
.brand-sub {
  font-size: 13px;
  letter-spacing: 2px;
  color: #d7cdba;
  opacity: 0.9;
}

/* ===== 布局 ===== */
.container { max-width: 580px; margin: 0 auto; padding: 20px 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 22px 20px;
  margin-bottom: 18px;
  box-shadow: 0 8px 30px rgba(34, 29, 24, 0.05);
}

/* 章节标题 */
.step-title {
  font-family: "Songti SC", "Noto Serif SC", Georgia, serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  color: var(--ink);
}
.num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  color: var(--gold);
  font-size: 14px;
  margin-right: 12px;
  font-family: Georgia, serif;
  flex: none;
}

/* ===== 上传区 ===== */
.uploader { display: block; position: relative; cursor: pointer; }
.uploader-inner {
  border: 1px dashed #cdc3ad;
  border-radius: 3px;
  padding: 48px 14px;
  text-align: center;
  color: var(--muted);
  transition: border-color 0.25s, background 0.25s;
  background: #faf7f0;
}
.uploader:active .uploader-inner { border-color: var(--gold); background: #f6f1e6; }
.up-icon {
  font-size: 30px;
  color: var(--gold);
  line-height: 1;
  font-weight: 300;
}
.up-text { font-size: 15px; margin-top: 12px; color: var(--ink); letter-spacing: 1px; }
.up-hint { font-size: 12px; margin-top: 6px; letter-spacing: 0.5px; }
.preview { display: none; width: 100%; border-radius: 3px; }
.uploader.has-image .uploader-inner { display: none; }
.uploader.has-image .preview { display: block; }

/* ===== 选项 chips ===== */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 10px 18px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 14px;
  letter-spacing: 1px;
  background: #fff;
  color: #5f584c;
  cursor: pointer;
  transition: all 0.2s;
}
.chip.active {
  background: var(--espresso);
  color: var(--gold-soft);
  border-color: var(--espresso);
}

.text-input {
  width: 100%;
  margin-top: 14px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-size: 15px;
  background: #fff;
  outline: none;
  color: var(--ink);
  transition: border-color 0.2s;
}
.text-input::placeholder { color: #b3ab9c; }
.text-input:focus { border-color: var(--gold); }

/* ===== 按钮 ===== */
.primary-btn {
  width: 100%;
  padding: 17px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  background: linear-gradient(135deg, #2c2620, #1b1712);
  color: var(--gold-soft);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 4px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s;
  box-shadow: 0 10px 26px rgba(34, 29, 24, 0.22);
}
.primary-btn:active { transform: translateY(1px); }
.primary-btn:disabled { opacity: 0.5; box-shadow: none; }

.ghost-btn {
  flex: 1;
  text-align: center;
  padding: 13px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  background: transparent;
  color: var(--gold);
  font-size: 14px;
  letter-spacing: 2px;
  cursor: pointer;
  text-decoration: none;
}

.tip { font-size: 12px; color: var(--muted); text-align: center; margin: 12px 4px; letter-spacing: 0.5px; }

/* ===== 结果对比 ===== */
.result-card { animation: fadeIn 0.4s; }
.compare { display: flex; gap: 12px; }
.compare-item { flex: 1; position: relative; }
.compare-item img {
  width: 100%;
  border-radius: 2px;
  display: block;
  background: #eee;
  border: 1px solid var(--line);
}
.compare-label {
  position: absolute; top: 0; left: 0;
  background: rgba(27, 23, 18, 0.78);
  color: #ece1cc;
  font-size: 11px;
  letter-spacing: 2px;
  padding: 5px 11px;
}
.compare-label.after { background: rgba(176, 141, 87, 0.95); color: #fff; }
.result-actions { display: flex; gap: 12px; margin-top: 18px; }

/* ===== 留资 ===== */
.lead-card {
  background: linear-gradient(160deg, #2c2620, #1c1813);
  border: 1px solid #3a3025;
  position: relative;
  overflow: hidden;
}
.lead-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.lead-title {
  font-family: "Songti SC", "Noto Serif SC", Georgia, serif;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 1px;
  color: #fbf3e4;
}
.lead-sub { font-size: 13px; color: #c4b9a4; margin: 8px 0 16px; letter-spacing: 0.5px; }
.lead-card .text-input {
  background: rgba(255, 255, 255, 0.06);
  border-color: #4a3f30;
  color: #f3ead9;
}
.lead-card .text-input::placeholder { color: #9a8f7c; }
.lead-card .text-input:focus { border-color: var(--gold); }
.lead-card .primary-btn {
  background: linear-gradient(135deg, var(--gold), #9a7843);
  color: #fff;
  border-color: var(--gold-soft);
  margin-top: 4px;
}
.lead-done { color: var(--gold-soft); text-align: center; letter-spacing: 1px; margin-top: 14px; }

/* ===== 页脚 ===== */
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 24px 16px; letter-spacing: 1px; }
.footer #brandContact { color: var(--gold); margin-bottom: 8px; }
.footer-tip { opacity: 0.7; font-size: 11px; }

/* ===== 遮罩 ===== */
.overlay {
  position: fixed; inset: 0;
  background: rgba(27, 23, 18, 0.82);
  backdrop-filter: blur(3px);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #f3ead9; z-index: 100;
}
.overlay-text { text-align: center; margin-top: 22px; font-size: 14px; line-height: 1.8; letter-spacing: 2px; color: #ddd1bc; }
.spinner {
  width: 44px; height: 44px;
  border: 2px solid rgba(216, 195, 154, 0.25);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }