/* 全局设计令牌：颜色、阴影与圆角统一从这里调整。 */
:root {
  color-scheme: light;
  --ink: #15251f;
  --ink-soft: #526059;
  --paper: #f5f2ea;
  --card: rgba(255, 255, 255, 0.88);
  --line: #d8ddd7;
  --green: #1e5d45;
  --green-deep: #154632;
  --green-pale: #e7f2eb;
  --amber: #a36313;
  --amber-pale: #fff2d8;
  --red: #a43e34;
  --red-pale: #fceae7;
  --blue: #315e73;
  --shadow: 0 26px 80px rgba(35, 54, 45, 0.12);
  --radius-large: 28px;
  --radius-medium: 18px;
  --radius-small: 12px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(199, 220, 203, 0.55), transparent 27rem),
    linear-gradient(140deg, #f8f5ee 0%, var(--paper) 48%, #eef1e9 100%);
  font-family:
    "Noto Sans SC", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system,
    BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button {
  border: 0;
}

[hidden] {
  display: none !important;
}

.page-decoration {
  position: fixed;
  z-index: -1;
  border: 1px solid rgba(30, 93, 69, 0.1);
  border-radius: 999px;
  pointer-events: none;
}

.page-decoration--one {
  top: -12rem;
  right: -13rem;
  width: 34rem;
  height: 34rem;
  box-shadow:
    inset 0 0 0 4rem rgba(255, 255, 255, 0.16),
    inset 0 0 0 8rem rgba(30, 93, 69, 0.025);
}

.page-decoration--two {
  bottom: 5rem;
  left: -15rem;
  width: 28rem;
  height: 28rem;
}

/* 页面骨架与顶部品牌区域。 */
.page-shell {
  width: min(100% - 40px, 980px);
  margin: 0 auto;
  padding: 54px 0 40px;
}

.hero {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: clamp(36px, 6vw, 64px);
  margin: 0 10px 38px;
}

.hero__heading {
  flex: 0 0 auto;
}

.hero__kicker {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.19em;
}

.offline-badge,
.format-chip,
.check-summary {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(40px, 4.2vw, 50px);
  font-weight: 780;
  line-height: 1.08;
  letter-spacing: -0.055em;
  white-space: nowrap;
}

.hero h1 span {
  margin-left: 0.22em;
  color: var(--green);
}

.hero__intro {
  max-width: 390px;
  margin: 0 0 2px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* 输入卡片与结果卡片共享同一套容器质感。 */
.parser-card,
.details-section,
.checks-card {
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: var(--radius-large);
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.parser-card {
  padding: clamp(26px, 5vw, 48px);
}

.parser-card__heading,
.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.parser-card__heading {
  margin-bottom: 30px;
}

.section-kicker {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.parser-card h2,
.section-heading h2,
.status-banner h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.3;
}

.offline-badge {
  gap: 7px;
  padding: 8px 12px;
  color: var(--green);
  background: var(--green-pale);
  letter-spacing: 0;
}

.offline-badge span {
  font-size: 9px;
}

.field-label {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
  font-weight: 700;
}

/* 身份证号码输入框及其复制、清空快捷操作。 */
.input-frame {
  position: relative;
}

#id-number {
  width: 100%;
  height: 68px;
  padding: 0 96px 0 20px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-small);
  outline: 0;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(17px, 3vw, 22px);
  font-weight: 650;
  letter-spacing: 0.055em;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

#id-number::placeholder {
  color: #9ba49f;
  font-family: inherit;
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0;
}

#id-number:focus {
  border-color: var(--green);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(30, 93, 69, 0.11);
}

.input-action {
  position: absolute;
  top: 50%;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  transform: translateY(-50%);
  border-radius: 50%;
  color: var(--ink-soft);
  background: #edf0ed;
  cursor: pointer;
  line-height: 1;
  transition: color 150ms ease, background 150ms ease;
}

.input-clear {
  right: 16px;
  font-size: 20px;
}

.input-copy {
  right: 54px;
}

.input-copy__icon {
  position: relative;
  width: 14px;
  height: 14px;
}

.input-copy__icon::before,
.input-copy__icon::after {
  position: absolute;
  width: 8px;
  height: 8px;
  border: 1.5px solid currentColor;
  border-radius: 2px;
  content: "";
}

.input-copy__icon::before {
  top: 0;
  left: 0;
  opacity: 0.55;
}

.input-copy__icon::after {
  right: 0;
  bottom: 0;
  background: #edf0ed;
}

.input-action:hover,
.input-copy.is-copied {
  color: #fff;
  background: var(--green);
}

.input-action:hover .input-copy__icon::after {
  background: var(--green);
}

.input-copy.is-copied .input-copy__icon::before {
  top: 1px;
  left: 5px;
  width: 5px;
  height: 10px;
  transform: rotate(42deg);
  border: 0;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  border-radius: 0;
  opacity: 1;
}

.input-copy.is-copied .input-copy__icon::after {
  display: none;
}

.field-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 9px;
  color: #76827b;
  font-size: 12px;
}

#char-count {
  font-variant-numeric: tabular-nums;
}

#char-count.is-over {
  color: var(--red);
  font-weight: 700;
}

/* 主次操作按钮。 */
.form-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.button {
  min-height: 56px;
  padding: 0 22px;
  border-radius: var(--radius-small);
  cursor: pointer;
  font-weight: 750;
  transition: transform 150ms ease, box-shadow 150ms ease, background 150ms ease;
}

.button:active {
  transform: translateY(1px);
}

.button:focus-visible,
.input-action:focus-visible {
  outline: 3px solid rgba(49, 94, 115, 0.34);
  outline-offset: 3px;
}

.button--primary {
  position: relative;
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: space-between;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  color: #fff;
  background: linear-gradient(135deg, #237557 0%, #18543d 100%);
  box-shadow:
    0 14px 30px rgba(30, 93, 69, 0.23),
    inset 0 1px 0 rgba(255, 255, 255, 0.13);
  font-size: 16px;
  letter-spacing: 0.025em;
}

.button--primary:hover:not(:disabled) {
  transform: translateY(-1px);
  background: linear-gradient(135deg, #287e5e 0%, #164a36 100%);
  box-shadow:
    0 18px 36px rgba(30, 93, 69, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.16);
}

.button__arrow {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  font-size: 19px;
  font-weight: 400;
  transition: transform 160ms ease, background 160ms ease;
}

.button--primary:hover:not(:disabled) .button__arrow {
  transform: translateX(2px);
  background: rgba(255, 255, 255, 0.16);
}

.button--primary:disabled {
  cursor: not-allowed;
  color: rgba(255, 255, 255, 0.72);
  background: linear-gradient(135deg, #96aaa1 0%, #7e9389 100%);
  box-shadow: none;
  opacity: 0.72;
}

.button--primary:disabled .button__arrow {
  background: rgba(255, 255, 255, 0.06);
  opacity: 0.72;
}

.button--ghost {
  min-width: 90px;
  border: 1px solid var(--line);
  color: var(--ink-soft);
  background: transparent;
}

.button--ghost:hover {
  color: var(--ink);
  background: #f1f3f0;
}

/* 本地处理与隐私边界提示。 */
.privacy-note {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-top: 24px;
  padding: 13px 16px;
  border: 1px solid #e1ebe4;
  border-radius: 13px;
  color: var(--ink-soft);
  background: #f4f8f5;
}

.privacy-note__icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(145deg, #2b7d5d, #18523c);
  box-shadow: 0 7px 16px rgba(30, 93, 69, 0.18);
}

.privacy-note__lock {
  position: relative;
  width: 13px;
  height: 11px;
  margin-top: 4px;
  border-radius: 3px;
  background: #fff;
}

.privacy-note__lock::before {
  position: absolute;
  top: -7px;
  left: 2px;
  width: 9px;
  height: 8px;
  border: 2px solid #fff;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  content: "";
}

.privacy-note__lock::after {
  position: absolute;
  top: 4px;
  left: 6px;
  width: 2px;
  height: 4px;
  border-radius: 2px;
  background: var(--green);
  content: "";
}

.privacy-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
}

.privacy-note strong {
  margin-right: 7px;
  color: var(--ink);
}

.privacy-note__meta {
  flex: 0 0 auto;
  margin-left: auto;
  color: var(--green);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

/* 历史记录：默认紧凑单行，展开后切换为完整详情列表。 */
.history-inline {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  margin-top: 11px;
  padding: 9px 11px;
  border: 1px solid #e1e7e2;
  border-radius: 11px;
  color: #79847e;
  background: rgba(248, 250, 248, 0.55);
  opacity: 0.9;
  transition: opacity 150ms ease;
}

.history-inline:hover,
.history-inline:focus-within,
.history-inline.is-expanded {
  opacity: 1;
}

.history-inline__title,
.history-inline__tools {
  display: flex;
  align-items: center;
}

.history-inline__title {
  flex: 0 0 auto;
  min-width: 0;
  gap: 6px;
}

.history-inline__title h3 {
  margin: 0;
  color: #68746d;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.4;
}

.history-inline__dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #91a198;
}

.history-inline__tools {
  flex: 0 0 auto;
  gap: 4px;
}

.history-count {
  color: #a0a8a3;
  font-size: 10px;
  font-weight: 600;
  white-space: nowrap;
}

.history-toggle,
.history-clear {
  min-height: 25px;
  padding: 0 6px;
  border-radius: 6px;
  color: #7e8983;
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  font-weight: 650;
  transition: color 150ms ease, background 150ms ease;
}

.history-toggle {
  color: #627e70;
}

.history-toggle:hover {
  background: var(--green-pale);
}

.history-clear:hover:not(:disabled) {
  color: var(--red);
  background: var(--red-pale);
}

.history-toggle:focus-visible,
.history-clear:focus-visible,
.history-item__open:focus-visible,
.history-item__action:focus-visible {
  outline: 3px solid rgba(49, 94, 115, 0.25);
  outline-offset: 2px;
}

.history-clear:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.history-empty {
  flex: 1 1 auto;
  margin: 0;
  color: #a0a8a3;
  font-size: 10px;
}

.history-list {
  display: flex;
  flex: 1 1 auto;
  flex-wrap: nowrap;
  gap: 5px;
  min-width: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  list-style: none;
}

.history-item {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 2px;
  min-width: 0;
  border: 1px solid rgba(216, 224, 218, 0.72);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
  transition: border-color 150ms ease, background 150ms ease, opacity 150ms ease;
}

.history-item:last-child {
  border-bottom: 1px solid rgba(216, 224, 218, 0.72);
}

.history-item:hover {
  border-color: #cad8cf;
  background: rgba(239, 245, 241, 0.72);
  opacity: 1;
}

.history-inline:not(.is-expanded) .history-item {
  opacity: 0.94;
}

.history-item__open {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 6px;
  min-width: 0;
  padding: 6px 2px 6px 9px;
  color: inherit;
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.history-item__heading {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.history-item__number {
  overflow: visible;
  min-width: 0;
  color: #5f6c65;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.025em;
  white-space: nowrap;
}

.history-item__format {
  display: none;
  flex: 0 0 auto;
  padding: 2px 5px;
  border-radius: 999px;
  color: var(--green);
  background: var(--green-pale);
  font-size: 9px;
  font-weight: 800;
}

.history-item__details {
  display: none;
  overflow: hidden;
  color: #6e7972;
  font-size: 10px;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: left;
}

.history-item__actions {
  display: inline-flex;
  flex: 0 0 auto;
  gap: 1px;
  padding-right: 2px;
}

.history-item__action {
  display: grid;
  place-items: center;
  width: 25px;
  height: 25px;
  border-radius: 6px;
  color: #929c96;
  background: transparent;
  cursor: pointer;
  transition: color 150ms ease, background 150ms ease;
}

.history-item__copy {
  display: none;
}

.history-item__copy:hover,
.history-item__copy.is-copied {
  color: var(--green);
  background: var(--green-pale);
}

.history-item__delete:hover {
  color: var(--red);
  background: var(--red-pale);
}

.history-copy-icon {
  position: relative;
  width: 10px;
  height: 10px;
  border: 1.4px solid currentColor;
  border-radius: 2px;
}

.history-copy-icon::before {
  position: absolute;
  top: -4px;
  left: -4px;
  width: 8px;
  height: 8px;
  border: 1.4px solid currentColor;
  border-radius: 2px;
  background: #f8faf8;
  content: "";
}

.history-item__copy.is-copied .history-copy-icon {
  width: 12px;
  height: 7px;
  transform: rotate(-45deg);
  border: 0;
  border-bottom: 1.8px solid currentColor;
  border-left: 1.8px solid currentColor;
  border-radius: 0;
}

.history-item__copy.is-copied .history-copy-icon::before {
  content: none;
}

.history-delete-icon {
  font-size: 15px;
  font-weight: 400;
  line-height: 1;
}

.history-inline.is-expanded {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0 10px;
  padding: 13px 14px;
  border-color: #d9e2dc;
  border-radius: 11px;
  color: var(--ink-soft);
  background: rgba(250, 251, 249, 0.92);
}

.history-inline.is-expanded .history-inline__title {
  grid-column: 1;
}

.history-inline.is-expanded .history-inline__tools {
  grid-column: 2;
}

.history-inline.is-expanded .history-list {
  display: block;
  grid-column: 1 / -1;
  width: 100%;
  margin-top: 8px;
  overflow: visible;
  border-top: 1px solid #e2e7e3;
}

.history-inline.is-expanded .history-item {
  gap: 8px;
  border: 0;
  border-bottom: 1px solid #e7ebe8;
  border-radius: 0;
  background: transparent;
}

.history-inline.is-expanded .history-item:last-child {
  border-bottom: 0;
}

.history-inline.is-expanded .history-item__open {
  display: grid;
  flex: 1 1 auto;
  grid-template-columns: minmax(180px, 0.72fr) minmax(0, 1fr);
  gap: 12px;
  padding: 11px 8px;
}

.history-inline.is-expanded .history-item__format {
  display: inline-block;
  font-size: 10px;
}

.history-inline.is-expanded .history-item__details {
  display: block;
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.55;
}

.history-inline.is-expanded .history-item__number {
  overflow: hidden;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
}

.history-inline.is-expanded .history-item__copy {
  display: grid;
}

.history-inline.is-expanded .history-inline__title h3 {
  color: var(--ink);
  font-size: 13px;
  font-weight: 750;
}

.history-inline.is-expanded .history-count,
.history-inline.is-expanded .history-toggle,
.history-inline.is-expanded .history-clear {
  font-size: 11px;
}

.history-inline.is-expanded .history-item__action {
  width: 29px;
  height: 29px;
}

/* 动态解析结果容器及其入场状态。 */
.result-panel {
  margin-top: 28px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 260ms ease, transform 260ms ease;
}

.result-panel.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 通过、旧版与失败三种状态提示。 */
.status-banner {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
  padding: 24px 28px;
  border: 1px solid #c7ddce;
  border-radius: var(--radius-medium);
  color: var(--green-deep);
  background: var(--green-pale);
}

.status-banner--error {
  border-color: #efc4bd;
  color: #762b25;
  background: var(--red-pale);
}

.status-banner--legacy {
  border-color: #ead2a5;
  color: #75460e;
  background: var(--amber-pale);
}

.status-banner__icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 25px;
  font-weight: 600;
}

.status-banner__kicker {
  margin: 0 0 3px;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.status-banner__description {
  margin: 5px 0 0;
  color: currentColor;
  font-size: 13px;
  line-height: 1.6;
  opacity: 0.82;
}

.warning-box {
  display: flex;
  gap: 13px;
  margin-bottom: 16px;
  padding: 17px 20px;
  border: 1px solid #ead2a5;
  border-radius: var(--radius-small);
  color: #71470e;
  background: var(--amber-pale);
}

.warning-box__icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 800;
}

.warning-box strong {
  display: block;
  margin: 1px 0 3px;
  font-size: 14px;
}

.warning-box p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
}

.details-section,
/* 解析详情、规则说明与逐项校验区域。 */
.checks-card {
  margin-top: 16px;
  padding: clamp(24px, 4vw, 36px);
  box-shadow: 0 18px 55px rgba(35, 54, 45, 0.08);
}

.section-heading {
  margin-bottom: 22px;
}

.format-chip,
.check-summary {
  padding: 7px 11px;
  color: var(--green);
  background: var(--green-pale);
  letter-spacing: 0;
}

/* 地区、性别、出生日期三列信息卡片。 */
.result-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 12px;
}

.result-item {
  position: relative;
  min-height: 152px;
  overflow: hidden;
  padding: 22px;
  border: 1px solid #e0e4df;
  border-radius: var(--radius-medium);
  background: rgba(250, 251, 248, 0.86);
}

.region-map-cue__pin {
  position: relative;
  width: 10px;
  height: 10px;
  transform: rotate(-45deg);
  border: 1.5px solid currentColor;
  border-radius: 50% 50% 50% 0;
}

.region-map-cue__pin::after {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.result-item__number {
  position: absolute;
  top: 12px;
  right: 16px;
  color: rgba(30, 93, 69, 0.12);
  font-family: Georgia, serif;
  font-size: 34px;
  font-style: italic;
}

.result-item__label {
  margin: 0 0 24px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
}

.result-item__value {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: clamp(21px, 3.4vw, 28px);
  font-weight: 760;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.result-item--wide .result-item__value {
  font-size: clamp(18px, 2.8vw, 24px);
}

.result-item__meta {
  margin: 8px 0 0;
  color: #758079;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
}

/* 15 位与 18 位按需转换的结果卡片。 */
.normalized-number {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 12px;
  padding: 20px 22px;
  border-radius: var(--radius-medium);
  color: #fff;
  background: var(--ink);
}

.result-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 12px;
}

.conversion-entry {
  display: inline-flex;
}

.result-action,
.conversion-entry__button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid #d8e2dc;
  border-radius: 10px;
  color: var(--green);
  background: rgba(255, 255, 255, 0.58);
  cursor: pointer;
  font-size: 12px;
  font-weight: 750;
  text-decoration: none;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.result-action:hover,
.conversion-entry__button:hover {
  transform: translateY(-1px);
  border-color: #bdd3c5;
  background: var(--green-pale);
}

.result-action:focus-visible,
.conversion-entry__button:focus-visible {
  outline: 3px solid rgba(49, 94, 115, 0.25);
  outline-offset: 3px;
}

.conversion-entry__icon {
  font-size: 16px;
  font-weight: 500;
}

.normalized-number__label {
  margin: 0 0 6px;
  color: #afc4b9;
  font-size: 11px;
  font-weight: 700;
}

.normalized-number__value {
  margin: 0;
  overflow-wrap: anywhere;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: clamp(16px, 3vw, 21px);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.normalized-number__value.is-unavailable {
  font-family: inherit;
  font-size: 16px;
  letter-spacing: 0;
}

.normalized-number__aside {
  display: flex;
  flex: 0 0 auto;
  align-items: flex-end;
  flex-direction: column;
  gap: 10px;
}

.normalized-number__note {
  max-width: none;
  color: #c6d4cd;
  font-size: 11px;
  line-height: 1.5;
  text-align: right;
  white-space: nowrap;
}

.normalized-number__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.copy-button {
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  cursor: pointer;
  font-size: 11px;
  font-weight: 700;
  transition: background 150ms ease, border-color 150ms ease;
}

.copy-button:hover {
  border-color: rgba(255, 255, 255, 0.48);
  background: rgba(255, 255, 255, 0.18);
}

.copy-button:focus-visible {
  outline: 3px solid rgba(231, 242, 235, 0.45);
  outline-offset: 3px;
}

.section-heading--compact {
  margin-bottom: 16px;
}

/* 可折叠的身份证编码规则说明。 */
.rules-guide {
  margin: 0 0 16px;
  border: 1px solid #dde5df;
  border-radius: 13px;
  background: rgba(247, 250, 247, 0.72);
}

.rules-guide summary {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 44px;
  padding: 0 14px;
  color: var(--ink);
  cursor: pointer;
  font-size: 12px;
  font-weight: 750;
  list-style: none;
}

.rules-guide summary::-webkit-details-marker {
  display: none;
}

.rules-guide summary::after {
  flex: 0 0 auto;
  margin-left: auto;
  color: var(--green);
  content: "+";
  font-size: 18px;
  font-weight: 500;
}

.rules-guide[open] summary::after {
  content: "−";
}

.rules-guide summary:focus-visible {
  outline: 3px solid rgba(49, 94, 115, 0.24);
  outline-offset: 3px;
}

.rules-guide__hint {
  color: #7b8780;
  font-size: 10px;
  font-weight: 500;
}

.rules-guide__body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px;
  padding: 0 12px 12px;
  border-top: 1px solid #e4e9e5;
}

.rule-card {
  min-width: 0;
  padding: 13px;
  border: 1px solid #e4e8e4;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
}

.rule-card:nth-child(-n + 2) {
  margin-top: 12px;
}

.rule-card--formula,
.rule-card--note {
  grid-column: 1 / -1;
}

.rule-card__range {
  display: block;
  margin-bottom: 5px;
  color: var(--green);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  font-weight: 750;
  letter-spacing: 0.06em;
}

.rule-card strong {
  display: block;
  margin-bottom: 5px;
  font-size: 12px;
}

.rule-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 10px;
  line-height: 1.65;
}

.rule-card p + p {
  margin-top: 3px;
}

.rule-card code {
  color: var(--ink);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
}

.rule-example {
  margin-top: 10px;
  padding: 11px 12px;
  border-left: 3px solid #82aa94;
  border-radius: 0 9px 9px 0;
  background: #f0f6f2;
}

.rule-example > strong {
  margin-bottom: 6px;
  color: var(--green-deep);
  font-size: 10px;
}

.rule-example ol {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
}

.rule-example li {
  padding-left: 2px;
  font-size: 10px;
  line-height: 1.7;
}

.rule-example code {
  overflow-wrap: anywhere;
  color: var(--ink);
  font-weight: 650;
}

.checks-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* 每项规则的通过、失败、说明与待检查状态。 */
.check-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 11px;
  min-width: 0;
  padding: 14px;
  border: 1px solid #e2e6e2;
  border-radius: var(--radius-small);
  background: rgba(250, 251, 248, 0.8);
  transition: border-color 150ms ease, background 150ms ease;
}

.check-item__copy {
  min-width: 0;
}

.check-item__icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  color: var(--green);
  background: var(--green-pale);
  font-size: 13px;
  font-weight: 800;
}

.check-item--fail .check-item__icon {
  color: var(--red);
  background: var(--red-pale);
}

.check-item--info .check-item__icon {
  color: var(--blue);
  background: #e5f0f4;
}

.check-item--pending .check-item__icon {
  color: #78847d;
  background: #edf0ed;
}

.check-item strong {
  display: block;
  margin: 2px 0 3px;
  font-size: 13px;
}

.check-item p {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--ink-soft);
  font-size: 11px;
  line-height: 1.55;
}

/* 标准来源、数据版本与能力边界。 */
.page-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
  padding: 30px 20px 0;
  color: #78827c;
  font-size: 11px;
  text-align: center;
}

.page-footer p {
  margin: 0;
}

.page-footer__disclaimer {
  flex-basis: 100%;
}

/* 平板与窄屏：结果改为单列，并压缩外围留白。 */
@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 28px, 980px);
    padding-top: 36px;
  }

  .hero {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
    margin: 0 0 30px;
  }

  .hero h1 {
    font-size: clamp(36px, 10vw, 46px);
    white-space: normal;
  }

  .hero__intro {
    max-width: 560px;
    font-size: 15px;
  }

  .rules-guide__body {
    grid-template-columns: 1fr;
  }

  .rule-card--formula,
  .rule-card--note {
    grid-column: auto;
  }

  .rule-card:nth-child(2) {
    margin-top: 0;
  }

  .result-grid {
    grid-template-columns: 1fr 1fr;
  }

  .result-item--wide {
    grid-column: 1 / -1;
  }

  .normalized-number {
    align-items: flex-start;
    flex-direction: column;
  }

  .normalized-number__note {
    max-width: none;
    text-align: left;
    white-space: normal;
  }

  .normalized-number__aside {
    flex: 0 0 auto;
    align-items: flex-start;
  }

  .privacy-note {
    flex-wrap: wrap;
  }

  .privacy-note__meta {
    flex-basis: 100%;
    margin-left: 49px;
  }
}

/* 手机端：历史默认隐藏，展开后完整换行显示每条信息。 */
@media (max-width: 520px) {
  .page-shell {
    width: min(100% - 20px, 980px);
    padding-top: 26px;
  }

  .parser-card {
    border-radius: 22px;
  }

  .history-inline:not(.is-expanded) {
    justify-content: space-between;
  }

  .history-inline:not(.is-expanded) .history-list {
    display: none;
  }

  .history-inline.is-expanded .history-item__open {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .history-inline.is-expanded .history-item__details {
    overflow: visible;
    text-overflow: clip;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .parser-card__heading,
  .section-heading {
    align-items: flex-start;
  }

  .offline-badge {
    padding: 7px 9px;
    font-size: 11px;
  }

  #id-number {
    height: 62px;
    padding-left: 15px;
    font-size: 16px;
    letter-spacing: 0.02em;
  }

  .form-actions {
    flex-direction: column;
  }

  .button--ghost {
    width: 100%;
  }

  .status-banner {
    align-items: flex-start;
    padding: 20px;
  }

  .status-banner__icon {
    width: 40px;
    height: 40px;
  }

  .result-grid,
  .checks-list {
    grid-template-columns: 1fr;
  }

  .result-item--wide {
    grid-column: auto;
  }

  .result-item {
    min-height: 138px;
  }

  .result-actions {
    flex-wrap: wrap;
  }

  .format-chip,
  .check-summary {
    flex: 0 0 auto;
    font-size: 11px;
  }
}

/* 尊重系统的“减少动态效果”无障碍偏好。 */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}