:root {
  --bg: #0f172a; --surface: #1e293b; --border: #334155;
  --text: #e2e8f0; --muted: #94a3b8; --accent: #38bdf8;
  --danger: #f87171; --warn: #fbbf24; --success: #4ade80; --purple: #a78bfa;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, 'SF Pro', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
  min-height: 100vh;
  -webkit-tap-highlight-color: transparent;
}

/* 流体单列容器：窄屏自然全宽，桌面限宽 800px */
.container { width: 100%; max-width: 800px; margin: 0 auto; padding: 16px; }

header { text-align: center; padding: 28px 0 16px; }
header h1 { font-size: 1.7rem; font-weight: 700; letter-spacing: -0.02em; }
header p { color: var(--muted); margin-top: 6px; font-size: 0.9rem; }
header .badge { display: inline-block; margin-top: 8px; padding: 4px 12px; border-radius: 20px; font-size: 0.75rem; background: var(--surface); border: 1px solid var(--border); color: var(--muted); }
header .badge.free { border-color: var(--success); color: var(--success); }
.header-note { color: var(--muted); font-size: 0.85rem; }
.header-date { color: var(--muted); font-size: 0.78rem; }

/* 卡片：暗黑主题 + 细腻阴影/圆角 */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 20px; margin-bottom: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.35), 0 1px 2px rgba(0,0,0,0.25);
}
.card h2 { font-size: 1.05rem; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* 表单行：flex-wrap 流体布局，窄屏自动单列，无需断点 */
.form-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.form-row .form-group { flex: 1 1 220px; }

.form-group { display: flex; flex-direction: column; gap: 3px; }
.form-group label { font-size: 0.78rem; color: var(--muted); font-weight: 500; }
.form-group select, .form-group input {
  padding: 10px 12px; min-height: 44px; background: var(--bg); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text); font-size: 0.88rem; width: 100%;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group select:focus, .form-group input:focus {
  border-color: var(--accent); outline: none;
  box-shadow: 0 0 0 3px rgba(56,189,248,0.15);
}

.chip-group { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 10px 16px; min-height: 44px; border-radius: 22px; background: var(--bg);
  border: 1px solid var(--border); color: var(--muted); font-size: 0.82rem;
  cursor: pointer; user-select: none;
  display: inline-flex; align-items: center;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}
.chip.active { border-color: var(--accent); color: var(--accent); background: rgba(56,189,248,0.1); }

.upload-slot {
  border: 2px dashed var(--border); border-radius: 12px;
  padding: 32px 16px; text-align: center; cursor: pointer;
  position: relative; overflow: hidden;
  transition: border-color 0.15s;
}
.upload-slot:hover { border-color: var(--accent); }
.upload-slot.has-file { border-style: solid; border-color: var(--success); padding: 10px; }
.upload-slot img { max-width: 100%; max-height: 300px; border-radius: 8px; }
.upload-slot input[type="file"] { display: none; }
.upload-slot .emoji { font-size: 2rem; display: block; margin-bottom: 6px; }

.api-key-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.btn-primary {
  display: block; width: 100%; padding: 14px; margin: 20px 0;
  min-height: 48px;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  color: #fff; border: none; border-radius: 12px;
  font-size: 1.05rem; font-weight: 600; cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s, transform 0.15s;
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary:hover:not(:disabled) { opacity: 0.92; transform: translateY(-1px); }
.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-secondary {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; min-height: 44px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; color: var(--accent); font-size: 0.9rem;
  cursor: pointer; text-decoration: none; font-family: inherit;
  transition: border-color 0.15s;
}

/* 行内 CTA（历史/结果/错误页的"再审核"链接按钮） */
.btn-inline { display: inline-block; width: auto; padding: 12px 32px; margin: 0; text-decoration: none; }
.actions-center { text-align: center; padding: 16px; }

/* 键盘/触摸焦点可见性 */
.btn-primary:focus-visible, .btn-secondary:focus-visible, .chip:focus-visible,
.share-bar button:focus-visible, .upload-slot:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

.loading { display: none; text-align: center; padding: 24px; }
.loading.show { display: block; }
.spinner {
  width: 40px; height: 40px; margin: 0 auto 12px;
  border: 3px solid var(--border); border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-steps { margin-top: 12px; }
.loading-steps .step { font-size: 0.82rem; color: var(--muted); margin: 4px 0; }
.loading-steps .step.done { color: var(--success); }
.loading-steps .step.active { color: var(--accent); }

.result { display: none; }
.result.show { display: block; }

/* 对比表：桌面/宽屏为标准表格；长文案自动换行 */
.compare-table { width: 100%; border-collapse: collapse; margin-bottom: 14px; }
.compare-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 0.88rem; word-break: break-word; }
.compare-table td:last-child { text-align: right; font-weight: 500; }
.compare-table .diff-row td { background: rgba(248,113,113,0.1); }
.compare-table .highlight td { font-size: 1rem; }

.diff-badge { display: inline-block; padding: 3px 10px; border-radius: 6px; font-weight: 600; font-size: 0.88rem; }
.diff-badge.bad { background: rgba(248,113,113,0.2); color: var(--danger); }
.diff-badge.good { background: rgba(74,222,128,0.2); color: var(--success); }

.report-box {
  background: var(--bg); border-radius: 8px; padding: 16px;
  white-space: pre-wrap; word-break: break-word; font-size: 0.85rem; line-height: 1.7;
  max-height: 400px; overflow-y: auto; margin: 12px 0;
}

.complaint-template {
  background: var(--bg); border: 1px solid var(--warn);
  border-radius: 8px; padding: 16px; margin-top: 12px;
  white-space: pre-wrap; word-break: break-word; font-size: 0.85rem; line-height: 1.6;
}
.complaint-template .cta-copy {
  display: inline-block; margin-top: 8px; padding: 10px 16px; min-height: 44px;
  background: var(--accent); color: var(--bg); border-radius: 6px;
  font-size: 0.8rem; cursor: pointer; border: none; font-family: inherit;
}

/* 分享栏：JS 直写 style.display='flex'/'none'，此处仅为显示时的布局 */
.share-bar {
  display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap;
}
.share-bar button {
  padding: 10px 16px; min-height: 44px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-size: 0.82rem;
  cursor: pointer; font-family: inherit;
  transition: border-color 0.15s;
}
.share-bar button:hover { border-color: var(--accent); }

/* 支付墙昵称行（行内样式抽出的 class） */
.paywall-row { display: flex; gap: 8px; max-width: 340px; margin: 0 auto; }
.paywall-row input {
  flex: 1; min-width: 0; padding: 10px 12px; min-height: 44px;
  border: 1px solid var(--border); border-radius: 8px; font-size: 0.9rem;
  background: var(--bg); color: var(--text); font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.paywall-row input:focus {
  border-color: var(--accent); outline: none;
  box-shadow: 0 0 0 3px rgba(56,189,248,0.15);
}
.paywall-row .btn-primary { width: auto; padding: 10px 18px; margin: 0; min-height: 44px; font-size: 0.95rem; }

.pricing-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-top: 16px; }
.pricing-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 16px; text-align: center; cursor: pointer;
  transition: border-color 0.15s;
}
.pricing-card:hover { border-color: var(--accent); }
.pricing-card .price { font-size: 1.5rem; font-weight: 700; margin: 8px 0; color: var(--accent); }
.pricing-card .desc { color: var(--muted); font-size: 0.8rem; }
.pricing-card.popular { border-color: var(--purple); position: relative; }
.pricing-card.popular::before { content: '推荐'; position: absolute; top: -10px; right: 12px; background: var(--purple); color: #fff; padding: 2px 10px; border-radius: 10px; font-size: 0.7rem; }

.payment-methods { display: flex; gap: 10px; margin: 16px 0; flex-wrap: wrap; }
.payment-methods .method {
  flex: 1 1 120px; padding: 12px; min-height: 44px; border: 1px solid var(--border); border-radius: 10px;
  text-align: center; cursor: pointer; font-size: 0.9rem;
  transition: border-color 0.15s, background 0.15s;
}
.payment-methods .method.active { border-color: var(--accent); background: rgba(56,189,248,0.1); }

.history-list { }
.history-item {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 4px 12px;
  padding: 12px; border-bottom: 1px solid var(--border);
}
.history-item .history-side { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.history-item .meta { font-size: 0.82rem; color: var(--muted); }
.history-item a { color: var(--accent); text-decoration: none; font-size: 0.88rem; }
.list-note { color: var(--muted); text-align: center; padding: 20px; }
.text-success { color: var(--success); }

footer {
  text-align: center; padding: 24px 16px; color: var(--muted); font-size: 0.75rem;
  line-height: 1.8;
}
footer a { color: var(--accent); text-decoration: none; }

/* 企业 logo：反色版用于深色 footer；高度约 140*(svg 宽高比)，下方留白≥logo 高 1/4 */
.site-logo { margin: 0 0 20px; }
.site-logo img { width: 140px; height: auto; }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: var(--surface); color: var(--text); padding: 10px 20px;
  border-radius: 8px; font-size: 0.85rem; z-index: 100; border: 1px solid var(--accent);
  opacity: 0; transition: opacity 0.3s;
  max-width: calc(100vw - 32px); text-align: center;
}
.toast.show { opacity: 1; }

.ocr-result-notice {
  background: rgba(251,191,36,0.1); border: 1px solid var(--warn);
  border-radius: 8px; padding: 10px; margin-bottom: 12px; font-size: 0.82rem;
}

/* ===== 窄屏兜底断点 1：≤600px ===== */
@media (max-width: 600px) {
  /* 输入框 16px，防 iOS 聚焦自动放大 */
  .form-group select, .form-group input, .paywall-row input { font-size: 16px; }

  /* 对比表降级为键值堆叠卡片（display:block 重排，不改 JS 生成的 DOM） */
  .compare-table, .compare-table tbody { display: block; width: 100%; }
  .compare-table tr {
    display: flex; flex-wrap: wrap; justify-content: space-between;
    align-items: baseline; gap: 2px 12px;
    padding: 10px 12px; margin-bottom: 8px;
    border: 1px solid var(--border); border-radius: 10px; background: var(--bg);
  }
  .compare-table td { display: block; border-bottom: none; padding: 0; }
  .compare-table td:first-child { color: var(--muted); font-size: 0.8rem; }
  .compare-table td:last-child { text-align: right; margin-left: auto; }
  .compare-table .diff-row { border-color: var(--danger); background: rgba(248,113,113,0.08); }
  .compare-table .diff-row td { background: transparent; }
}

/* ===== 窄屏兜底断点 2：≤400px ===== */
@media (max-width: 400px) {
  .container { padding: 12px; }
  header h1 { font-size: 1.45rem; }
  .card { padding: 16px; }
  /* 支付墙昵称行竖排堆叠 */
  .paywall-row { flex-direction: column; }
  .paywall-row .btn-primary { width: 100%; }
}