/* ============================================================
   儿童视力筛查等效球镜换算器 · 独立视觉：薄荷纸 + 深青 + 视力表 E
   ============================================================ */

.sph-page {
  --sph-bg: #f1f7f5;
  --sph-bg-2: #e4f1ed;
  --sph-card: #ffffff;
  --sph-soft: #edf5f2;
  --sph-soft-2: #dcebe5;
  --sph-ink: #12302c;
  --sph-muted: #5c7a73;
  --sph-line: #d5e6e0;
  --sph-accent: #0f766e;
  --sph-accent-2: #3aa89a;
  --sph-warn: #a15c07;
  --sph-bad: #b42318;
  --sph-ok: #147a55;
  --sph-blue: #2563a8;
  --sph-shadow: 0 12px 32px rgba(18, 68, 60, .08);

  background: var(--sph-bg);
  color: var(--sph-ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  padding-bottom: 48px;
  transition: background-color .2s ease, color .2s ease;
}

:root[data-theme="dark"] .sph-page {
  --sph-bg: #081413;
  --sph-bg-2: #0c1d1b;
  --sph-card: #102321;
  --sph-soft: #142b28;
  --sph-soft-2: #1b3733;
  --sph-ink: #e8f3f0;
  --sph-muted: #9ab5ae;
  --sph-line: #1f3b36;
  --sph-accent: #4cc2b2;
  --sph-accent-2: #7ad9c9;
  --sph-warn: #f0b45f;
  --sph-bad: #f08a80;
  --sph-ok: #5fd39c;
  --sph-blue: #7fb3e0;
  --sph-shadow: 0 12px 32px rgba(0, 0, 0, .4);
}

html[data-theme="dark"] .sph-page { color-scheme: dark; }

.sph-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 20px 0;
}

/* ---------- 面包屑 ---------- */
.sph-crumb {
  font-size: 13px;
  color: var(--sph-muted);
  margin-bottom: 14px;
}
.sph-crumb a { color: var(--sph-muted); text-decoration: none; }
.sph-crumb a:hover { color: var(--sph-accent); }

/* ---------- Hero ---------- */
.sph-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 210px;
  gap: 20px;
  align-items: center;
  background:
    radial-gradient(560px 220px at 88% -12%, rgba(58, 168, 154, .26), transparent 70%),
    linear-gradient(135deg, var(--sph-bg-2), var(--sph-card) 74%);
  border: 1px solid var(--sph-line);
  border-radius: 22px;
  padding: 26px 28px;
  box-shadow: var(--sph-shadow);
  margin-bottom: 20px;
}
.sph-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--sph-accent);
  background: rgba(15, 118, 110, .1);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 8px;
}
.sph-hero h1 {
  font-size: 28px;
  line-height: 1.35;
  margin: 0 0 10px;
  letter-spacing: -.01em;
}
.sph-hero p {
  margin: 0;
  font-size: 14.5px;
  color: var(--sph-muted);
  max-width: 650px;
}
.sph-hero p b { color: var(--sph-ink); }
.sph-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.sph-hero-meta span {
  font-size: 12px;
  color: var(--sph-accent);
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 8px;
  padding: 4px 10px;
  font-weight: 600;
}

/* 视力表 E */
.sph-chart {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px 10px;
  padding: 14px;
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  border-radius: 12px;
  box-shadow: var(--sph-shadow);
}
.sph-chart i {
  position: relative;
  display: block;
  height: 34px;
}
.sph-chart i::before {
  content: "E";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-family: "Courier New", monospace;
  font-size: 23px;
  font-weight: 800;
  line-height: 1;
  color: var(--sph-accent);
}
.sph-chart i:nth-child(1)::before { transform: translate(-50%, -50%) rotate(0deg); font-size: 30px; }
.sph-chart i:nth-child(2)::before { transform: translate(-50%, -50%) rotate(180deg); font-size: 30px; }
.sph-chart i:nth-child(3)::before { transform: translate(-50%, -50%) rotate(270deg); font-size: 30px; }
.sph-chart i:nth-child(4)::before { transform: translate(-50%, -50%) rotate(90deg); font-size: 24px; }
.sph-chart i:nth-child(5)::before { transform: translate(-50%, -50%) rotate(0deg); font-size: 24px; }
.sph-chart i:nth-child(6)::before { transform: translate(-50%, -50%) rotate(180deg); font-size: 24px; }
.sph-chart i:nth-child(7)::before { transform: translate(-50%, -50%) rotate(270deg); font-size: 19px; }
.sph-chart i:nth-child(8)::before { transform: translate(-50%, -50%) rotate(90deg); font-size: 19px; }
.sph-chart i:nth-child(9)::before { transform: translate(-50%, -50%) rotate(0deg); font-size: 19px; }

/* ---------- 主栅格 ---------- */
.sph-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 20px;
  align-items: start;
}
.sph-col { min-width: 0; }

/* ---------- 卡片 ---------- */
.sph-card {
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--sph-shadow);
}
.sph-card + .sph-card { margin-top: 16px; }
.sph-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.sph-card-head h2 {
  font-size: 17px;
  margin: 0;
  letter-spacing: -.01em;
}
.sph-card-head span {
  font-size: 12px;
  color: var(--sph-muted);
}

/* ---------- 表单 ---------- */
.sph-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 14px;
}
.sph-fields.gap { margin-top: 12px; }
.sph-field { min-width: 0; }
.sph-field.full { grid-column: 1 / -1; }
.sph-field > label {
  display: block;
  font-size: 12.5px;
  color: var(--sph-muted);
  font-weight: 600;
  margin-bottom: 5px;
}
.sph-input {
  width: 100%;
  box-sizing: border-box;
  height: 40px;
  padding: 0 11px;
  font-size: 15px;
  color: var(--sph-ink);
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 9px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
  font-variant-numeric: tabular-nums;
}
.sph-input:focus {
  border-color: var(--sph-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, .14);
  background-color: var(--sph-card);
}
.sph-unit { position: relative; }
.sph-unit .sph-input { padding-right: 44px; }
.sph-unit em {
  position: absolute;
  right: 11px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  font-style: normal;
  color: var(--sph-muted);
  pointer-events: none;
}

/* 眼别输入块 */
.sph-eyes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.sph-eyes.gap { margin-top: 12px; }
.sph-eye {
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 12px;
  padding: 13px 14px;
}
.sph-eye-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}
.sph-eye-head b {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
}
.sph-eye-head b::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sph-accent);
}
.sph-eye-head small {
  font-size: 11.5px;
  color: var(--sph-muted);
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  border-radius: 999px;
  padding: 1px 8px;
}
.sph-eye .sph-fields { grid-template-columns: 1fr 1fr; gap: 9px; }
.sph-eye .sph-field:nth-child(3) { grid-column: 1 / -1; }

.sph-hint {
  font-size: 12px;
  color: var(--sph-muted);
  margin: 10px 0 0;
  line-height: 1.7;
}
.sph-hint b { color: var(--sph-ink); }

.sph-error {
  margin-top: 12px;
  padding: 9px 12px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--sph-warn);
  background: rgba(161, 92, 7, .08);
  border: 1px solid rgba(161, 92, 7, .22);
  border-radius: 9px;
}
.sph-error:empty { display: none; }

/* ---------- 汇总卡 ---------- */
.sph-summary {
  position: sticky;
  top: 14px;
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--sph-shadow);
}
.sph-sum-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}
.sph-sum-head h2 { font-size: 16px; margin: 0; }
.sph-badge {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--sph-accent);
  background: var(--sph-soft);
  border-radius: 999px;
  padding: 3px 9px;
  white-space: nowrap;
}

.sph-se {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.sph-sebox {
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 12px;
  padding: 10px 12px;
}
.sph-sebox span {
  display: block;
  font-size: 11.5px;
  color: var(--sph-muted);
  margin-bottom: 2px;
}
.sph-sebox b {
  display: block;
  font-size: 30px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--sph-accent);
  font-variant-numeric: tabular-nums;
}
.sph-sebox small {
  display: inline-block;
  font-size: 11.5px;
  font-weight: 600;
  border-radius: 999px;
  padding: 1px 7px;
  margin-top: 4px;
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  color: var(--sph-muted);
}
.sph-sebox small.ok { color: var(--sph-ok); border-color: rgba(20, 122, 85, .3); }
.sph-sebox small.warn { color: var(--sph-warn); border-color: rgba(161, 92, 7, .3); }
.sph-sebox small.bad { color: var(--sph-bad); border-color: rgba(180, 35, 24, .3); }

.sph-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 12px;
}
.sph-metric {
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 10px;
  padding: 8px 11px;
}
.sph-metric span {
  display: block;
  font-size: 11.5px;
  color: var(--sph-muted);
}
.sph-metric b {
  font-size: 17px;
  font-variant-numeric: tabular-nums;
}
.sph-metric b.ok { color: var(--sph-ok); }
.sph-metric b.warn { color: var(--sph-warn); }
.sph-metric b.bad { color: var(--sph-bad); }

.sph-verdict {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
}
.sph-verdict h3 {
  margin: 0 0 6px;
  font-size: 14px;
}
.sph-verdict p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--sph-muted);
}
.sph-verdict.ok { background: rgba(20, 122, 85, .07); border-color: rgba(20, 122, 85, .22); }
.sph-verdict.warn { background: rgba(161, 92, 7, .08); border-color: rgba(161, 92, 7, .22); }
.sph-verdict.bad { background: rgba(180, 35, 24, .07); border-color: rgba(180, 35, 24, .22); }
.sph-verdict b { color: var(--sph-ink); }

.sph-advice {
  margin: 12px 0 0;
  padding: 0 0 0 18px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--sph-muted);
}
.sph-advice li { margin-bottom: 4px; }
.sph-advice li b { color: var(--sph-ink); }

/* ---------- 操作按钮 ---------- */
.sph-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 20px;
}
.sph-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 0;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  background: linear-gradient(135deg, var(--sph-accent), var(--sph-accent-2));
  color: #fff;
  box-shadow: 0 6px 16px rgba(15, 118, 110, .22);
  transition: transform .12s, box-shadow .12s, opacity .12s;
}
.sph-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px rgba(15, 118, 110, .3); }
.sph-btn:active { transform: translateY(0); }
.sph-btn.ghost {
  background: var(--sph-card);
  color: var(--sph-ink);
  border: 1px solid var(--sph-line);
  box-shadow: none;
}
.sph-btn.ghost:hover { border-color: var(--sph-accent); color: var(--sph-accent); }
.sph-btn.link {
  background: none;
  color: var(--sph-accent);
  box-shadow: none;
  padding: 10px 6px;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.sph-btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- 批量 ---------- */
.sph-batch {
  margin-top: 18px;
}
.sph-textarea {
  width: 100%;
  box-sizing: border-box;
  min-height: 140px;
  padding: 12px 14px;
  font-size: 13.5px;
  line-height: 1.9;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  color: var(--sph-ink);
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 10px;
  outline: none;
  resize: vertical;
}
.sph-textarea:focus {
  border-color: var(--sph-accent);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, .14);
  background: var(--sph-card);
}
.sph-batch-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--sph-muted);
}
.sph-batch-bar b { color: var(--sph-ink); font-variant-numeric: tabular-nums; }
.sph-batch-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}
.sph-batch-actions .sph-btn { padding: 9px 16px; font-size: 13px; }

/* ---------- 内容块 ---------- */
.sph-block {
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  border-radius: 16px;
  padding: 22px 24px;
  box-shadow: var(--sph-shadow);
  margin-top: 18px;
}
.sph-block h2 {
  font-size: 19px;
  margin: 0 0 10px;
  letter-spacing: -.01em;
}
.sph-block h3 {
  font-size: 15px;
  margin: 18px 0 8px;
}
.sph-block p {
  font-size: 14px;
  color: var(--sph-muted);
  margin: 0 0 10px;
}
.sph-block p b { color: var(--sph-ink); }

.sph-tbl-wrap { overflow-x: auto; margin: 14px -4px 0; }
.sph-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.sph-table th {
  text-align: left;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--sph-muted);
  background: var(--sph-soft);
  padding: 9px 10px;
  border-bottom: 1px solid var(--sph-line);
  white-space: nowrap;
}
.sph-table th:first-child { border-radius: 8px 0 0 8px; }
.sph-table th:last-child { border-radius: 0 8px 8px 0; }
.sph-table td { padding: 10px; border-bottom: 1px solid var(--sph-line); }
.sph-table tbody tr:last-child td { border-bottom: none; }
.sph-table td.num, .sph-table th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.sph-table td b { font-variant-numeric: tabular-nums; }
.sph-table tr.hi td { background: rgba(15, 118, 110, .06); }
.sph-table td.ok { color: var(--sph-ok); font-weight: 700; }
.sph-table td.warn { color: var(--sph-warn); font-weight: 700; }
.sph-table td.bad { color: var(--sph-bad); font-weight: 700; }
.sph-table td.err { color: var(--sph-bad); }

/* 公式块 */
.sph-formula {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 12px;
  padding: 16px;
  margin: 14px 0;
  text-align: center;
}
.sph-formula b {
  font-size: 20px;
  font-weight: 800;
  color: var(--sph-accent);
  letter-spacing: -.01em;
}
.sph-formula span {
  font-size: 12.5px;
  color: var(--sph-muted);
  display: block;
}
.sph-formula em {
  font-style: normal;
  font-size: 22px;
  font-weight: 700;
  color: var(--sph-muted);
}

/* 清单 */
.sph-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.sph-list li {
  position: relative;
  background: var(--sph-soft);
  border: 1px solid var(--sph-line);
  border-radius: 10px;
  padding: 11px 13px 11px 34px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sph-muted);
}
.sph-list li::before {
  content: "!";
  position: absolute;
  left: 11px;
  top: 11px;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--sph-accent);
  color: #fff;
  font-size: 10px;
  font-weight: 800;
  line-height: 15px;
  text-align: center;
}
.sph-list li b { color: var(--sph-ink); }

/* FAQ */
.sph-faq { margin-top: 18px; }
.sph-faq details {
  background: var(--sph-card);
  border: 1px solid var(--sph-line);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 8px;
}
.sph-faq summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  list-style: none;
}
.sph-faq summary::-webkit-details-marker { display: none; }
.sph-faq summary::before {
  content: "+";
  display: inline-block;
  width: 18px;
  color: var(--sph-accent);
  font-weight: 800;
}
.sph-faq details[open] summary::before { content: "−"; }
.sph-faq p {
  margin: 8px 0 0 18px;
  font-size: 13px;
  color: var(--sph-muted);
}

.sph-disclaimer {
  margin-top: 20px;
  padding: 12px 16px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--sph-muted);
  background: var(--sph-soft);
  border: 1px dashed var(--sph-line);
  border-radius: 10px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
  .sph-grid { grid-template-columns: 1fr; }
  .sph-summary { position: static; }
  .sph-chart { display: none; }
  .sph-hero { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .sph-eyes { grid-template-columns: 1fr; }
  .sph-list { grid-template-columns: 1fr; }
  .sph-actions .sph-btn { flex: 1; justify-content: center; }
  .sph-formula { grid-template-columns: 1fr; gap: 6px; }
  .sph-formula em { display: none; }
}
@media (max-width: 600px) {
  .sph-shell { padding: 12px 12px 0; }
  .sph-hero { padding: 20px 18px; }
  .sph-hero h1 { font-size: 22px; }
  .sph-block { padding: 17px 15px; }
  .sph-card-head { flex-direction: column; align-items: flex-start; gap: 2px; }
  .sph-table { font-size: 11.5px; }
  .sph-table th, .sph-table td { padding: 8px 6px; }
}

/* ---------- 打印 ---------- */
@media print {
  .sph-page { background: #fff; padding: 0; }
  .sph-crumb, .sph-hero-meta, .sph-actions, .sph-faq, .sph-chart,
  .sph-disclaimer, .sph-batch-actions { display: none !important; }
  .sph-hero, .sph-card, .sph-summary, .sph-block { box-shadow: none; border-color: #bbb; }
  .sph-grid { grid-template-columns: 1fr 1fr; }
  .sph-summary { position: static; }
  .sph-block { break-inside: avoid; }
}