/* ==========================================================================
   时间戳转换器 · shijianchuozhuanhuanqi.com
   设计基线参考 Yamatane Museum：深蓝、白、黑、芥末黄、锋利直角、留白。
   ========================================================================== */

:root {
  --color-primary: #003c88;
  --color-primary-deep: #002a60;
  --color-primary-soft: #eef3fa;
  --color-primary-line: rgba(0, 60, 136, 0.18);
  --color-background: #ffffff;
  --color-text: #000000;
  --color-text-soft: #30353b;
  --color-muted: #626a73;
  --color-accent: #ffe280;
  --color-accent-red: #870e00;
  --color-line: #d9d9d9;
  --color-mist: #f6f7f9;
  --color-dark: #061a33;
  --font-ja: "Zen Kaku Gothic Antique", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-en: "Apfel Grotezk", "Helvetica Neue", "Arial", sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", "Liberation Mono", Consolas, monospace;
  --rail: 252px;
  --content-max: 1398px;
  --gutter: clamp(18px, 5.5vw, 90px);
  --section-space: clamp(45px, 6vw, 90px);
  --ease: cubic-bezier(0.8, 0, 0.3, 1);
  --ease-fade: cubic-bezier(0.19, 0.49, 0.59, 0.9);
  --focus-ring: rgba(0, 60, 136, 0.15);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-ja);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--color-accent);
  color: var(--color-text);
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: opacity 0.2s var(--ease), color 0.2s var(--ease);
}

a:hover {
  opacity: 0.7;
}

p,
h1,
h2,
h3,
h4,
ul,
ol,
dl,
dd,
figure {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.22;
  letter-spacing: -0.02em;
  font-weight: 700;
}

p {
  margin-bottom: 18px;
}

code,
pre,
kbd {
  font-family: var(--font-mono);
}

[hidden] {
  display: none !important;
}

.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  left: 18px;
  top: -80px;
  z-index: 100;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 18px;
  text-decoration: none;
}

.skip-link:focus {
  top: 18px;
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   侧栏 / 顶部导航
   -------------------------------------------------------------------------- */

.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 13;
  width: var(--rail);
  display: flex;
  flex-direction: column;
  padding: 27px 27px 18px;
  background: var(--color-background);
  border-right: 1px solid var(--color-line);
}

.site-header__brandrow {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-text);
  text-decoration: none;
}

.brand:hover {
  opacity: 0.7;
  color: var(--color-text);
}

.brand__mark {
  width: 45px;
  height: 45px;
  flex: 0 0 45px;
  display: grid;
  place-items: center;
  background: var(--color-primary);
  color: #fff;
}

.brand__mark svg {
  width: 25px;
  height: 25px;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand__name {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.brand__en {
  font-family: var(--font-en);
  font-size: 9px;
  line-height: 1.4;
  letter-spacing: 0.16em;
  color: var(--color-muted);
}

.nav-toggle {
  display: none;
  width: 45px;
  height: 45px;
  padding: 0;
  border: 1px solid var(--color-line);
  background: #fff;
  color: var(--color-primary);
  place-items: center;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}

.nav-toggle__bars span {
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s var(--ease), top 0.2s var(--ease);
}

.nav-toggle__bars span:first-child {
  top: 2px;
}

.nav-toggle__bars span:last-child {
  top: 9px;
}

.site-header.is-nav-open .nav-toggle__bars span:first-child {
  top: 5.5px;
  transform: rotate(45deg);
}

.site-header.is-nav-open .nav-toggle__bars span:last-child {
  top: 5.5px;
  transform: rotate(-45deg);
}

.site-nav {
  min-height: 0;
  margin-top: 54px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.nav-group + .nav-group {
  margin-top: 27px;
}

.nav-label {
  margin: 0 0 9px;
  font-family: var(--font-en);
  font-size: 10px;
  line-height: 1.3;
  letter-spacing: 0.18em;
  color: var(--color-muted);
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 7px;
  min-height: 36px;
  padding: 7px 0;
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.nav-link::after {
  content: "↗";
  margin-left: auto;
  font-family: var(--font-en);
  font-size: 11px;
  color: var(--color-primary);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-link:hover,
.nav-link:hover::after {
  opacity: 1;
  color: var(--color-primary);
}

.nav-link:hover::after {
  opacity: 0.8;
  transform: translateX(0);
}

.nav-link[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 700;
}

.nav-link[aria-current="page"]::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--color-accent-red);
  margin-right: 0;
  flex: 0 0 8px;
}

.nav-link[aria-current="page"]::after {
  content: "";
}

.rail-foot {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  font-size: 10px;
  line-height: 1.7;
  color: var(--color-muted);
}

.rail-foot__status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 600;
}

.rail-foot__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #208a4b;
}

.rail-foot__clock {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--color-text-soft);
}

/* --------------------------------------------------------------------------
   页面骨架
   -------------------------------------------------------------------------- */

.site-main {
  margin-left: var(--rail);
  overflow: clip;
}

.wrap {
  width: min(calc(100% - var(--gutter) * 2), var(--content-max));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-space);
  border-top: 1px solid var(--color-line);
}

.section--soft {
  background: var(--color-primary-soft);
}

.section--dark {
  background: var(--color-primary);
  color: #fff;
}

.section--dark a {
  color: #fff;
}

.eyebrow,
.kicker {
  margin: 0;
  font-family: var(--font-en);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.18em;
  color: var(--color-primary);
}

.kicker--light {
  color: var(--color-accent);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 36px;
  align-items: start;
  margin-bottom: 45px;
}

.section-head > *,
.statement > *,
.split > *,
.content-grid > *,
.article-layout > *,
.converter__grid > *,
.calc-grid > *,
.batch-tool__body > *,
.tz-form > *,
.footer__top > * {
  min-width: 0;
}

.section-head__title {
  margin: 9px 0 0;
  font-size: clamp(30px, 3.2vw, 42px);
}

.section-head__body {
  padding-top: 4px;
}

.section-head__body p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 17px;
  line-height: 1.85;
}

.section-head__body p + p {
  margin-top: 12px;
}

.section-title {
  margin: 9px 0 27px;
  font-size: clamp(30px, 3.4vw, 44px);
}

.section-title--small {
  font-size: clamp(24px, 2.6vw, 32px);
}

.lead {
  font-size: 18px;
  line-height: 1.85;
  color: var(--color-text-soft);
}

.muted {
  color: var(--color-muted);
}

.small {
  font-size: 13px;
  line-height: 1.7;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.en {
  font-family: var(--font-en);
}

/* --------------------------------------------------------------------------
   按钮、标签、表单
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 11px 24px;
  border: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  text-decoration: none;
  transition: opacity 0.2s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.btn:hover {
  opacity: 0.7;
}

.btn:active {
  opacity: 0.8;
  transform: translateY(1px);
}

.btn svg {
  width: 17px;
  height: 17px;
  flex: 0 0 17px;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  color: #fff;
}

.btn--secondary {
  background: #fff;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--ghost {
  min-height: 38px;
  padding: 6px 0;
  color: var(--color-primary);
}

.btn--light {
  background: #fff;
  color: var(--color-primary);
}

.btn--outline-light {
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}

.btn--small {
  min-height: 38px;
  padding: 7px 15px;
  font-size: 12px;
}

.btn--block {
  width: 100%;
}

.btn:disabled {
  background: var(--color-line);
  border-color: var(--color-line);
  color: #fff;
  cursor: not-allowed;
  opacity: 1;
}

.text-button {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 0;
  border: 0;
  background: none;
  color: var(--color-primary);
  font-size: 12px;
  line-height: 1.4;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-button:hover {
  opacity: 0.7;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 26px;
  padding: 3px 9px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

.tag--accent {
  background: var(--color-accent);
  color: var(--color-text);
}

.tag--dark {
  background: var(--color-dark);
  color: #fff;
}

.field {
  min-width: 0;
}

.field label,
.field-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 9px;
  margin-bottom: 9px;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

.field-label span {
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 400;
}

.field-help {
  margin: 9px 0 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.7;
}

.field-error {
  margin: 9px 0 0;
  color: var(--color-accent-red);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.7;
}

input[type="text"],
input[type="number"],
input[type="datetime-local"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 13px;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: #fff;
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.5;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.7;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: rgba(0, 0, 0, 0.04) 0 1px 2px inset, var(--focus-ring) 0 0 0 2px;
}

input::placeholder,
textarea::placeholder {
  color: #8a9098;
  opacity: 1;
}

select {
  appearance: none;
  padding-right: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%23003c88' stroke-width='1.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  cursor: pointer;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.input-row {
  display: flex;
  align-items: stretch;
  gap: 9px;
}

.input-row input {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.input-row .btn {
  flex: 0 0 auto;
  white-space: nowrap;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 18px 0;
}

.preset-row__label {
  margin-right: 2px;
  color: var(--color-muted);
  font-size: 11px;
}

.chip {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: #fff;
  color: var(--color-text-soft);
  font-size: 12px;
  line-height: 1.5;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.chip:hover,
.chip.is-active {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.chip.is-active {
  background: var(--color-primary-soft);
}

.chip--accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   首页 Hero
   -------------------------------------------------------------------------- */

.hero {
  padding-block: clamp(45px, 6vw, 72px) clamp(54px, 7vw, 90px);
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 9px 27px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-muted);
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.hero__meta span:last-child {
  color: var(--color-primary);
}

.hero h1 {
  max-width: 1100px;
  margin: 36px 0 27px;
  font-size: clamp(42px, 5.7vw, 78px);
  line-height: 1.14;
  letter-spacing: -0.045em;
}

.hero h1 .h1-aside {
  display: block;
  margin-top: 12px;
  color: var(--color-primary);
  font-size: 0.63em;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.hero h1 .mark {
  background: var(--color-accent);
  padding: 0 0.08em;
}

.hero__lead {
  max-width: 940px;
  margin-bottom: 36px;
  color: var(--color-text-soft);
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.85;
}

.hero__note {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 27px;
  margin-top: 18px;
  color: var(--color-muted);
  font-size: 12px;
}

.hero__note span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero__note span::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--color-primary);
}

/* --------------------------------------------------------------------------
   转换器
   -------------------------------------------------------------------------- */

.converter {
  position: relative;
  background: #fff;
  border: 1px solid var(--color-primary-line);
  border-top: 5px solid var(--color-primary);
}

.converter__top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  border-bottom: 1px solid var(--color-primary-line);
}

.converter__title {
  padding: 25px 36px;
}

.converter__title h2 {
  margin: 7px 0 0;
  font-size: clamp(24px, 2.5vw, 32px);
}

.live {
  padding: 22px 27px;
  background: var(--color-primary-soft);
  border-left: 1px solid var(--color-primary-line);
}

.live__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.live__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #208a4b;
  animation: pulse 2s var(--ease-fade) infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.35;
  }
}

.live__number {
  display: block;
  width: 100%;
  margin: 4px 0 0;
  padding: 0;
  border: 0;
  background: none;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.1vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.04em;
  text-align: left;
  font-variant-numeric: tabular-nums;
}

.live__number:hover {
  opacity: 0.7;
}

.live__meta {
  margin: 4px 0 0;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  line-height: 1.6;
  font-variant-numeric: tabular-nums;
}

.live__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 9px;
}

.live__actions button {
  min-height: 30px;
  padding: 4px 8px;
  border: 1px solid var(--color-primary-line);
  background: #fff;
  color: var(--color-primary);
  font-size: 10px;
  line-height: 1.4;
}

.live__actions button:hover {
  opacity: 0.7;
}

.converter__tabs {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--color-line);
  overflow-x: auto;
  scrollbar-width: thin;
}

.tab {
  flex: 0 0 auto;
  min-height: 52px;
  padding: 13px 27px;
  border: 0;
  border-right: 1px solid var(--color-line);
  border-bottom: 3px solid transparent;
  background: #fff;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.tab span {
  margin-left: 6px;
  font-family: var(--font-en);
  font-size: 9px;
  color: var(--color-muted);
  letter-spacing: 0.08em;
}

.tab:hover {
  color: var(--color-primary);
}

.tab.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  background: #fff;
}

.tab.is-active span {
  color: var(--color-primary);
}

.tab-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 13px 27px;
  color: var(--color-primary);
  font-size: 12px;
  text-decoration: none;
  white-space: nowrap;
}

.tab-link::after {
  content: "↗";
  font-family: var(--font-en);
  font-size: 11px;
}

.tab-panel {
  padding: 36px;
}

.converter__grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.1fr);
  gap: 36px;
  align-items: start;
}

.converter__form {
  min-width: 0;
}

.converter__submit {
  width: 100%;
  margin-top: 9px;
}

.converter__zone-note {
  display: flex;
  gap: 9px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.7;
}

.converter__zone-note strong {
  color: var(--color-primary);
  font-weight: 600;
}

.converter__foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 9px 27px;
  padding: 12px 36px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.6;
}

.result {
  min-height: 356px;
  padding: 27px;
  border: 1px solid var(--color-primary-line);
  border-left: 4px solid var(--color-primary);
  background: #f8fafc;
}

.result__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 9px;
}

.result__label {
  margin: 0 0 12px;
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.12em;
}

.result__date {
  margin: 0 0 4px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: clamp(24px, 2.6vw, 34px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.04em;
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.result__zone {
  margin: 0 0 9px;
  color: var(--color-text-soft);
  font-size: 12px;
  font-weight: 600;
}

.result__sub {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.7;
}

.result__sub span + span::before {
  content: "/";
  margin-right: 18px;
  color: var(--color-line);
}

.result__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 24px 0 0;
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.result__grid > div {
  min-width: 0;
  padding: 10px 12px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.result__grid dt {
  margin-bottom: 3px;
  color: var(--color-muted);
  font-size: 9px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.result__grid dd {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.result__grid dd span {
  min-width: 0;
}

.copy-mini {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: inline-grid;
  place-items: center;
  border: 0;
  background: transparent;
  color: var(--color-primary);
  padding: 0;
}

.copy-mini:hover {
  opacity: 0.6;
}

.copy-mini svg {
  width: 13px;
  height: 13px;
}

.result__formats {
  margin-top: 18px;
  border-top: 1px solid var(--color-line);
}

.result__format {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) 24px;
  align-items: center;
  gap: 9px;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-line);
}

.result__format > span {
  color: var(--color-muted);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result__format code {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--color-text-soft);
  font-size: 11px;
  line-height: 1.5;
}

.result__empty {
  display: grid;
  place-items: center;
  min-height: 300px;
  padding: 27px;
  border: 1px dashed var(--color-line);
  color: var(--color-muted);
  font-size: 13px;
  text-align: center;
}

.result__empty strong {
  display: block;
  margin-bottom: 6px;
  color: var(--color-primary);
  font-size: 18px;
}

.result__error {
  margin: 0;
  padding: 18px;
  border: 1px solid rgba(135, 14, 0, 0.3);
  background: #fdf4f2;
  color: var(--color-accent-red);
  font-size: 13px;
  line-height: 1.7;
}

.result__warning {
  margin: 12px 0 0;
  padding: 9px 12px;
  background: #fff8dc;
  border-left: 3px solid var(--color-accent);
  color: #5d4b00;
  font-size: 11px;
  line-height: 1.7;
}

.converter__quick {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--color-primary-line);
  border-top: 0;
  background: #fff;
}

.quick-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 63px;
  padding: 14px 27px;
  border-right: 1px solid var(--color-line);
  color: var(--color-text);
  text-decoration: none;
}

.quick-link:last-child {
  border-right: 0;
}

.quick-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  opacity: 1;
}

.quick-link__name {
  display: block;
  font-size: 13px;
  font-weight: 600;
}

.quick-link__note {
  display: block;
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.5;
}

.quick-link__arrow {
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   首页内容模块
   -------------------------------------------------------------------------- */

.proof {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.proof__item {
  padding: 24px 27px;
  border-right: 1px solid var(--color-line);
}

.proof__item:last-child {
  border-right: 0;
}

.proof__index {
  display: block;
  margin-bottom: 9px;
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.14em;
}

.proof__title {
  margin: 0 0 4px;
  font-size: 17px;
}

.proof__text {
  margin: 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.7;
}

.statement {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.1fr);
  gap: 54px;
}

.statement__title {
  margin: 9px 0 0;
  font-size: clamp(30px, 3.1vw, 42px);
  text-wrap: balance;
}

.section-head__title,
.section-title,
.page-hero h1,
.article-hero h1,
.content-page h1,
.article-card h2 {
  text-wrap: balance;
}

.statement__body {
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.9;
}

.statement__body p:last-child {
  margin-bottom: 0;
}

.statement__body strong {
  color: var(--color-primary);
}

.callout {
  margin-top: 27px;
  padding: 18px 21px;
  background: var(--color-accent);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.8;
}

.callout strong {
  display: block;
  margin-bottom: 3px;
  font-size: 12px;
  letter-spacing: 0.06em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.feature {
  padding: 27px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: #fff;
}

.feature__number {
  display: block;
  margin-bottom: 27px;
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.14em;
}

.feature__title {
  margin: 0 0 9px;
  font-size: 19px;
}

.feature__text {
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.8;
}

.feature__link {
  display: inline-flex;
  gap: 5px;
  margin-top: 18px;
  color: var(--color-primary);
  font-size: 12px;
  text-decoration: none;
}

.feature__link::after {
  content: "↗";
  font-family: var(--font-en);
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-line);
}

.use-card {
  position: relative;
  padding: 27px 27px 27px 0;
  border-bottom: 1px solid var(--color-line);
}

.use-card + .use-card {
  padding-left: 27px;
  border-left: 1px solid var(--color-line);
}

.use-card__no {
  display: block;
  margin-bottom: 45px;
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.use-card h3 {
  margin: 0 0 9px;
  font-size: 22px;
}

.use-card p {
  margin: 0 0 18px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.8;
}

.use-card a {
  font-size: 12px;
  text-decoration: none;
}

.use-card a::after {
  content: " ↗";
  font-family: var(--font-en);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 54px;
  align-items: start;
}

.split--reverse {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.split__body {
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.9;
}

.split__body p:last-child {
  margin-bottom: 0;
}

.split__aside {
  border-top: 3px solid var(--color-primary);
  padding-top: 21px;
}

.aside-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.aside-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.aside-list dt,
.aside-list .term {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.aside-list dd,
.aside-list .desc {
  margin: 0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.7;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-line);
}

.step {
  padding: 27px 27px 0 0;
}

.step + .step {
  padding-left: 27px;
  border-left: 1px solid var(--color-line);
}

.step__no {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 18px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-en);
  font-size: 12px;
}

.step h3 {
  margin: 0 0 9px;
  font-size: 19px;
}

.step p {
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.8;
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  border-top: 1px solid var(--color-line);
}

.data-table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  padding: 12px 14px;
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.6;
  white-space: nowrap;
}

.data-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.7;
  vertical-align: top;
}

.data-table td:first-child {
  color: var(--color-text);
  font-weight: 600;
}

.data-table .mono {
  font-size: 12px;
}

.data-table tr:last-child td {
  border-bottom: 0;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-line);
}

.check-list li {
  position: relative;
  padding: 13px 0 13px 27px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 13px;
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 13px;
}

.code-block {
  position: relative;
  margin: 27px 0;
  background: var(--color-dark);
  color: #f3f7fb;
  overflow: hidden;
}

.code-block__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 9px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--font-en);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.code-block pre {
  margin: 0;
  padding: 18px;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.8;
  tab-size: 2;
}

.code-block code {
  color: #eaf2fb;
  background: none;
  padding: 0;
  font-size: inherit;
}

.code-copy {
  padding: 4px 8px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: transparent;
  color: #fff;
  font-family: var(--font-ja);
  font-size: 10px;
  line-height: 1.5;
}

.code-copy:hover {
  opacity: 0.7;
}

.code-block--light {
  background: var(--color-primary-soft);
  color: var(--color-text);
}

.code-block--light .code-block__head {
  border-bottom-color: var(--color-line);
  color: var(--color-muted);
}

.code-block--light code {
  color: var(--color-text);
}

.code-block--light .code-copy {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.cta {
  padding-block: clamp(45px, 6vw, 90px);
  background: var(--color-primary);
  color: #fff;
}

.cta__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 45px;
}

.cta h2 {
  max-width: 760px;
  margin: 0 0 12px;
  font-size: clamp(30px, 3.5vw, 46px);
  color: #fff;
}

.cta p {
  max-width: 680px;
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  line-height: 1.8;
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  flex: 0 0 auto;
}

.cta .btn--primary {
  background: var(--color-accent);
  color: var(--color-text);
}

/* --------------------------------------------------------------------------
   内页 Hero / 面包屑
   -------------------------------------------------------------------------- */

.page-hero {
  padding-block: 36px clamp(36px, 5vw, 63px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  margin-bottom: 36px;
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.6;
}

.breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb span[aria-hidden] {
  color: var(--color-line);
}

.page-hero h1 {
  max-width: 1050px;
  margin: 12px 0 18px;
  font-size: clamp(36px, 4.8vw, 64px);
  letter-spacing: -0.04em;
}

.page-hero__lead {
  max-width: 880px;
  margin: 0;
  color: var(--color-text-soft);
  font-size: 18px;
  line-height: 1.85;
}

.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 11px;
}

.page-hero__meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.page-hero__meta span::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--color-primary);
}

.page-hero--tool .page-hero__lead {
  max-width: 960px;
}

.tool-page-section {
  padding-bottom: var(--section-space);
}

/* --------------------------------------------------------------------------
   批量转换
   -------------------------------------------------------------------------- */

.batch-tool {
  border: 1px solid var(--color-primary-line);
  border-top: 5px solid var(--color-primary);
  background: #fff;
}

.batch-tool__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  padding: 21px 27px;
  border-bottom: 1px solid var(--color-line);
}

.batch-tool__head h2 {
  margin: 4px 0 0;
  font-size: 24px;
}

.batch-tool__head p {
  margin: 0;
  color: var(--color-muted);
  font-size: 12px;
}

.batch-tool__body {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 36px;
  padding: 27px;
}

.batch-form {
  min-width: 0;
}

.batch-form textarea {
  min-height: 270px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.batch-form__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 12px;
}

.batch-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.batch-side {
  min-width: 0;
  padding: 21px;
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary-line);
}

.batch-side h3 {
  margin: 0 0 9px;
  font-size: 18px;
}

.batch-side p {
  margin: 0 0 18px;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.8;
}

.batch-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-primary-line);
  border-left: 1px solid var(--color-primary-line);
}

.batch-stat {
  padding: 12px;
  border-right: 1px solid var(--color-primary-line);
  border-bottom: 1px solid var(--color-primary-line);
}

.batch-stat__label {
  display: block;
  color: var(--color-muted);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.batch-stat__value {
  display: block;
  margin-top: 3px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
}

.batch-result {
  margin-top: 27px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
}

.batch-result__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
  margin-bottom: 12px;
}

.batch-result__head h3 {
  margin: 0;
  font-size: 17px;
}

.batch-result__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.batch-table-wrap {
  max-height: 420px;
  overflow: auto;
  border: 1px solid var(--color-line);
}

.batch-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 11px;
}

.batch-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  padding: 8px 9px;
  border-bottom: 2px solid var(--color-primary);
  background: #fff;
  color: var(--color-primary);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: left;
  white-space: nowrap;
}

.batch-table td {
  padding: 8px 9px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  line-height: 1.5;
  vertical-align: top;
  overflow-wrap: anywhere;
}

.batch-table tr.is-error td {
  background: #fdf4f2;
  color: var(--color-accent-red);
}

.batch-table .batch-table__index {
  width: 34px;
  color: var(--color-muted);
  font-family: var(--font-en);
}

.batch-empty {
  padding: 27px;
  border: 1px dashed var(--color-line);
  color: var(--color-muted);
  font-size: 12px;
  text-align: center;
}

/* --------------------------------------------------------------------------
   时间计算
   -------------------------------------------------------------------------- */

.calc-tool {
  border: 1px solid var(--color-primary-line);
  border-top: 5px solid var(--color-primary);
  background: #fff;
}

.calc-tabs {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-line);
}

.calc-tab {
  flex: 0 0 auto;
  min-height: 54px;
  padding: 13px 24px;
  border: 0;
  border-right: 1px solid var(--color-line);
  border-bottom: 3px solid transparent;
  background: #fff;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.calc-tab.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.calc-panel {
  padding: 27px;
}

.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: 36px;
  align-items: start;
}

.calc-form .field + .field {
  margin-top: 18px;
}

.calc-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.calc-form__row + .calc-form__row {
  margin-top: 18px;
}

.calc-hint {
  margin: 9px 0 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--color-accent);
  background: #fffaf0;
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.7;
}

.calc-result {
  min-height: 260px;
  padding: 27px;
  border: 1px solid var(--color-primary-line);
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-soft);
}

.calc-result__big {
  margin: 0 0 3px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.04em;
  overflow-wrap: anywhere;
}

.calc-result__sub {
  margin: 0 0 18px;
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.7;
}

.calc-result__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  border-top: 1px solid var(--color-primary-line);
  border-left: 1px solid var(--color-primary-line);
}

.calc-result__grid > div {
  min-width: 0;
  padding: 10px 12px;
  border-right: 1px solid var(--color-primary-line);
  border-bottom: 1px solid var(--color-primary-line);
}

.calc-result__grid dt {
  color: var(--color-muted);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.calc-result__grid dd {
  margin: 2px 0 0;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.calc-empty {
  display: grid;
  place-items: center;
  min-height: 210px;
  border: 1px dashed var(--color-primary-line);
  color: var(--color-muted);
  font-size: 12px;
  text-align: center;
}

.calc-result__error {
  margin: 0;
  padding: 14px;
  border: 1px solid rgba(135, 14, 0, 0.3);
  background: #fdf4f2;
  color: var(--color-accent-red);
  font-size: 12px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   时区
   -------------------------------------------------------------------------- */

.zone-live {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
  margin-bottom: 45px;
}

.zone-clock {
  padding: 18px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.zone-clock__name {
  display: block;
  margin-bottom: 9px;
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.zone-clock__time {
  display: block;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 23px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.zone-clock__meta {
  display: block;
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.6;
}

.tz-tool {
  border: 1px solid var(--color-primary-line);
  border-top: 5px solid var(--color-primary);
  background: #fff;
  padding: 27px;
}

.tz-tool__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}

.tz-tool__head h2 {
  margin: 4px 0 0;
  font-size: 24px;
}

.tz-tool__head p {
  margin: 0;
  color: var(--color-muted);
  font-size: 12px;
}

.tz-form {
  display: grid;
  grid-template-columns: 1.1fr 1fr 0.8fr;
  gap: 18px;
  align-items: end;
}

.tz-form .btn {
  width: 100%;
}

.tz-output {
  margin-top: 27px;
  border-top: 1px solid var(--color-line);
  padding-top: 24px;
}

.tz-output__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 9px;
  margin-bottom: 18px;
}

.tz-output__head h3 {
  margin: 0;
  font-size: 18px;
}

.tz-output__head p {
  margin: 0;
  color: var(--color-muted);
  font-size: 11px;
}

.zone-result-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.zone-result {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  min-height: 108px;
  padding: 18px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.zone-result__place {
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
}

.zone-result__date {
  display: block;
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.6;
}

.zone-result__time {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.03em;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.zone-result__offset {
  display: block;
  color: var(--color-muted);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: 0.04em;
}

.zone-day {
  display: inline-block;
  margin-left: 4px;
  padding: 1px 4px;
  background: var(--color-accent);
  color: var(--color-text);
  font-family: var(--font-ja);
  font-size: 9px;
  vertical-align: 2px;
}

/* --------------------------------------------------------------------------
   文章 / 指南 / 问答
   -------------------------------------------------------------------------- */

.article-hero {
  padding-block: 36px 45px;
  border-bottom: 1px solid var(--color-line);
}

.article-hero h1 {
  max-width: 960px;
  margin: 12px 0 18px;
  font-size: clamp(34px, 4.3vw, 58px);
}

.article-hero__lead {
  max-width: 820px;
  color: var(--color-text-soft);
  font-size: 18px;
  line-height: 1.85;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
  margin-top: 18px;
  color: var(--color-muted);
  font-size: 11px;
}

.article-layout {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr) 220px;
  gap: clamp(27px, 3.3vw, 54px);
  align-items: start;
  padding-block: var(--section-space);
}

.prose {
  max-width: 780px;
}

.article-toc {
  position: sticky;
  top: 27px;
  padding-top: 12px;
  border-top: 3px solid var(--color-primary);
}

.article-toc__title {
  margin: 0 0 9px;
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: 0.16em;
}

.article-toc a {
  display: block;
  padding: 5px 0;
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.6;
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
}

.article-toc a:hover {
  color: var(--color-primary);
}

.prose {
  min-width: 0;
}

.prose > :first-child {
  margin-top: 0;
}

.prose h2 {
  margin: 54px 0 18px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  font-size: clamp(26px, 2.6vw, 34px);
  scroll-margin-top: 90px;
}

.prose h3 {
  margin: 36px 0 12px;
  font-size: 22px;
  scroll-margin-top: 90px;
}

.prose p {
  margin-bottom: 18px;
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.95;
}

.prose ul,
.prose ol {
  margin: 0 0 24px;
  padding-left: 22px;
  color: var(--color-text-soft);
  font-size: 16px;
  line-height: 1.9;
}

.prose li + li {
  margin-top: 6px;
}

.prose li::marker {
  color: var(--color-primary);
}

.prose strong {
  color: var(--color-text);
  font-weight: 700;
}

.prose a {
  color: var(--color-primary);
}

.prose blockquote {
  margin: 27px 0;
  padding: 18px 21px;
  border-left: 4px solid var(--color-accent);
  background: var(--color-primary-soft);
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.9;
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

.prose code {
  padding: 2px 5px;
  background: #eef1f5;
  color: var(--color-accent-red);
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

.prose .code-block code {
  padding: 0;
  background: none;
  color: inherit;
}

.prose table {
  width: 100%;
  margin: 27px 0;
  border-collapse: collapse;
  font-size: 13px;
}

.prose th {
  padding: 9px 11px;
  border-bottom: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-size: 11px;
  text-align: left;
}

.prose td {
  padding: 9px 11px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  line-height: 1.7;
}

.prose hr {
  margin: 36px 0;
  border: 0;
  border-top: 1px solid var(--color-line);
}

.article-aside {
  position: sticky;
  top: 27px;
  padding: 21px;
  border: 1px solid var(--color-primary-line);
  background: var(--color-primary-soft);
}

.article-aside h2 {
  margin: 0 0 9px;
  font-size: 16px;
}

.article-aside p {
  margin: 0 0 18px;
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.8;
}

.article-aside .btn {
  width: 100%;
}

.article-footer {
  margin-top: 45px;
  padding-top: 27px;
  border-top: 1px solid var(--color-line);
}

.related {
  margin-top: 27px;
}

.related h2 {
  margin: 0 0 9px;
  font-size: 18px;
}

.related-list {
  border-top: 1px solid var(--color-line);
}

.related-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-size: 13px;
  line-height: 1.6;
  text-decoration: none;
}

.related-list a span {
  flex: 0 0 auto;
  color: var(--color-muted);
  font-family: var(--font-en);
  font-size: 9px;
}

.related-list a:hover {
  color: var(--color-primary);
}

.article-index {
  padding-block: var(--section-space);
}

.article-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.article-card {
  display: flex;
  flex-direction: column;
  min-height: 260px;
  padding: 27px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text);
  text-decoration: none;
}

.article-card:hover {
  color: var(--color-text);
  background: var(--color-primary-soft);
  opacity: 1;
}

.article-card__meta {
  display: flex;
  justify-content: space-between;
  gap: 9px;
  margin-bottom: 36px;
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.article-card h2 {
  margin: 0 0 9px;
  font-size: 24px;
  line-height: 1.35;
}

.article-card p {
  margin: 0 0 21px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.8;
}

.article-card__link {
  margin-top: auto;
  color: var(--color-primary);
  font-size: 12px;
}

.article-card__link::after {
  content: " ↗";
  font-family: var(--font-en);
}

.faq-list {
  border-top: 1px solid var(--color-line);
}

.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  position: relative;
  display: block;
  padding: 18px 45px 18px 0;
  color: var(--color-text);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  cursor: pointer;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 14px;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-primary-line);
  color: var(--color-primary);
  font-family: var(--font-en);
  font-size: 17px;
  font-weight: 400;
}

.faq-item[open] summary {
  color: var(--color-primary);
}

.faq-item[open] summary::after {
  content: "−";
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.faq-item__answer {
  padding: 0 45px 21px 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.9;
}

.faq-item__answer p:last-child {
  margin-bottom: 0;
}

.faq-item__answer code {
  padding: 2px 4px;
  background: #eef1f5;
  font-size: 0.9em;
}

.faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-line);
}

.faq-jump a {
  padding: 5px 10px;
  border: 1px solid var(--color-line);
  color: var(--color-primary);
  font-size: 11px;
  text-decoration: none;
}

.faq-jump a:hover {
  border-color: var(--color-primary);
  opacity: 0.7;
}

.prose-intro {
  max-width: 880px;
  margin-bottom: 36px;
  color: var(--color-text-soft);
  font-size: 18px;
  line-height: 1.9;
}

/* --------------------------------------------------------------------------
   关于、隐私、404
   -------------------------------------------------------------------------- */

.content-page {
  padding-block: 36px var(--section-space);
}

.content-page .breadcrumb {
  margin-bottom: 45px;
}

.content-page h1 {
  max-width: 940px;
  margin: 12px 0 18px;
  font-size: clamp(36px, 4.8vw, 62px);
}

.content-page__lead {
  max-width: 800px;
  margin-bottom: 45px;
  color: var(--color-text-soft);
  font-size: 18px;
  line-height: 1.9;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(27px, 4.2vw, 63px);
  align-items: start;
}

.content-grid__aside {
  padding-top: 9px;
  border-top: 3px solid var(--color-primary);
}

.content-grid__aside h2 {
  margin: 0 0 9px;
  font-size: 18px;
}

.content-grid__aside p {
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.8;
}

.content-grid__main {
  min-width: 0;
}

.content-grid__main h2 {
  margin: 36px 0 12px;
  font-size: 27px;
}

.content-grid__main h2:first-child {
  margin-top: 0;
}

.content-grid__main p {
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.95;
}

.content-grid__main ul {
  padding-left: 21px;
  color: var(--color-text-soft);
  font-size: 15px;
  line-height: 1.9;
}

.content-grid__main li + li {
  margin-top: 6px;
}

.fact-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
  margin: 27px 0;
}

.fact {
  padding: 18px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.fact strong {
  display: block;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1.3;
}

.fact span {
  display: block;
  margin-top: 3px;
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.6;
}

.not-found {
  min-height: calc(100vh - 220px);
  display: flex;
  align-items: center;
  padding-block: 90px;
}

.not-found__code {
  display: block;
  margin-bottom: 18px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: clamp(80px, 16vw, 180px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.08em;
}

.not-found h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 48px);
}

.not-found p {
  max-width: 620px;
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.9;
}

.not-found__links {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 27px;
}

/* --------------------------------------------------------------------------
   页脚 / 浮层
   -------------------------------------------------------------------------- */

.site-footer {
  margin-left: var(--rail);
  background: var(--color-primary);
  color: #fff;
  padding-block: 54px 21px;
}

.site-footer a {
  color: #fff;
  text-decoration: none;
}

.site-footer a:hover {
  opacity: 0.7;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.9fr repeat(3, 0.8fr);
  gap: 45px;
  padding-bottom: 45px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.24);
}

.footer__brand .brand {
  color: #fff;
}

.footer__brand .brand:hover {
  color: #fff;
}

.footer__brand .brand__mark {
  background: #fff;
  color: var(--color-primary);
}

.footer__brand .brand__en {
  color: rgba(255, 255, 255, 0.65);
}

.footer__tagline {
  max-width: 400px;
  margin: 18px 0 9px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  line-height: 1.8;
}

.footer__note {
  margin: 0;
  color: rgba(255, 255, 255, 0.55);
  font-size: 10px;
  line-height: 1.7;
}

.footer__col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
}

.footer__title {
  margin: 0 0 7px;
  color: var(--color-accent);
  font-family: var(--font-en);
  font-size: 9px;
  letter-spacing: 0.16em;
}

.footer__col a {
  font-size: 12px;
  line-height: 1.8;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding-top: 18px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 10px;
  line-height: 1.8;
}

.footer__bottom p {
  margin: 0;
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 18px;
}

.toast {
  position: fixed;
  right: 27px;
  bottom: 27px;
  z-index: 100;
  max-width: min(320px, calc(100vw - 54px));
  padding: 11px 18px;
  background: var(--color-dark);
  color: #fff;
  font-size: 12px;
  line-height: 1.6;
  opacity: 0;
  visibility: hidden;
  transform: translateY(9px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
}

.toast.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top {
  position: fixed;
  right: 27px;
  bottom: 27px;
  z-index: 12;
  width: 45px;
  height: 45px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  background: var(--color-primary);
  color: #fff;
  opacity: 0;
  visibility: hidden;
  transform: translateY(9px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  opacity: 0.7;
}

.to-top svg {
  width: 18px;
  height: 18px;
}

/* --------------------------------------------------------------------------
   响应式
   -------------------------------------------------------------------------- */

@media (max-width: 1560px) {
  .article-layout {
    grid-template-columns: 170px minmax(0, 1fr);
  }

  .article-aside {
    display: none;
  }
}

@media (max-width: 1279px) {
  .converter__grid {
    grid-template-columns: minmax(260px, 0.9fr) minmax(320px, 1.1fr);
    gap: 27px;
  }

  .tab-panel {
    padding: 27px;
  }

  .zone-live {
    grid-template-columns: repeat(4, 1fr);
  }

  .article-layout {
    grid-template-columns: 170px minmax(0, 1fr);
  }

  .article-aside {
    display: none;
  }
}

@media (max-width: 1023px) {
  .site-header {
    position: sticky;
    top: 0;
    right: 0;
    inset: 0 0 auto 0;
    width: 100%;
    height: auto;
    display: block;
    padding: 0;
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
    background: rgba(255, 255, 255, 0.98);
  }

  .site-header__brandrow {
    align-items: center;
    min-height: 69px;
    padding: 0 var(--gutter);
  }

  .brand__mark {
    width: 39px;
    height: 39px;
    flex-basis: 39px;
  }

  .brand__mark svg {
    width: 22px;
    height: 22px;
  }

  .brand__name {
    font-size: 15px;
  }

  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: absolute;
    top: 69px;
    left: 0;
    right: 0;
    z-index: 13;
    display: none;
    max-height: calc(100vh - 69px);
    margin: 0;
    padding: 18px var(--gutter) 27px;
    overflow-y: auto;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
  }

  .site-nav.is-open {
    display: block;
  }

  .nav-group + .nav-group {
    margin-top: 18px;
  }

  .nav-link {
    min-height: 44px;
    padding: 9px 0;
    border-bottom-color: var(--color-line);
  }

  .rail-foot {
    display: none;
  }

  .site-main,
  .site-footer {
    margin-left: 0;
  }

  .hero {
    padding-top: 36px;
  }

  .converter__top {
    grid-template-columns: minmax(0, 1fr);
  }

  .live {
    border-left: 0;
    border-top: 1px solid var(--color-primary-line);
  }

  .converter__grid,
  .calc-grid,
  .batch-tool__body {
    grid-template-columns: minmax(0, 1fr);
  }

  .result,
  .calc-result {
    min-height: 0;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .proof {
    grid-template-columns: repeat(2, 1fr);
  }

  .proof__item:nth-child(2) {
    border-right: 0;
  }

  .proof__item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--color-line);
  }

  .zone-live {
    grid-template-columns: repeat(3, 1fr);
  }

  .tz-form {
    grid-template-columns: 1fr 1fr;
  }

  .tz-form .btn {
    grid-column: span 2;
  }

  .article-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .article-toc {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 18px;
    padding: 9px 0 18px;
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
  }

  .article-toc__title {
    flex: 1 0 100%;
  }

  .article-toc a {
    border: 0;
    padding: 3px 0;
  }

  .article-layout .article-toc {
    order: -1;
  }

  .content-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .content-grid__aside {
    padding-bottom: 18px;
  }

  .footer__top {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 899px) {
  .section-head,
  .statement,
  .split,
  .split--reverse {
    grid-template-columns: minmax(0, 1fr);
    gap: 27px;
  }

  .section-head {
    margin-bottom: 27px;
  }

  .use-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .use-card,
  .use-card + .use-card {
    padding: 21px 0;
    border-left: 0;
  }

  .use-card__no {
    margin-bottom: 18px;
  }

  .steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .step,
  .step + .step {
    padding: 21px 0;
    border-left: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .step:last-child {
    border-bottom: 0;
  }

  .cta__inner {
    display: block;
  }

  .cta__actions {
    margin-top: 27px;
  }

  .article-cards {
    grid-template-columns: minmax(0, 1fr);
  }

  .article-card {
    min-height: 0;
  }

  .article-card__meta {
    margin-bottom: 18px;
  }

  .zone-live {
    grid-template-columns: repeat(2, 1fr);
  }

  .zone-result-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 27px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  :root {
    --gutter: 18px;
    --section-space: 45px;
  }

  body {
    font-size: 15px;
  }

  .hero h1 {
    margin-top: 27px;
    font-size: clamp(36px, 9.2vw, 52px);
    letter-spacing: -0.035em;
  }

  .hero h1 .h1-aside {
    margin-top: 9px;
    font-size: 0.58em;
  }

  .hero__lead {
    font-size: 15px;
    line-height: 1.85;
  }

  .converter__title,
  .tab-panel,
  .tz-tool,
  .calc-panel {
    padding: 18px;
  }

  .converter__title {
    padding-bottom: 14px;
  }

  .live {
    padding: 18px;
  }

  .tab {
    padding: 12px 18px;
    min-height: 50px;
  }

  .tab-link {
    display: none;
  }

  .converter__grid {
    gap: 21px;
  }

  .result {
    padding: 18px;
  }

  .result__grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .result__date {
    font-size: 24px;
  }

  .result__format {
    grid-template-columns: 70px minmax(0, 1fr) 24px;
  }

  .converter__quick {
    grid-template-columns: minmax(0, 1fr);
  }

  .quick-link {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
    padding: 12px 18px;
  }

  .quick-link:last-child {
    border-bottom: 0;
  }

  .proof {
    grid-template-columns: minmax(0, 1fr);
  }

  .proof__item,
  .proof__item:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .proof__item:last-child {
    border-bottom: 0;
  }

  .feature-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .feature {
    padding: 21px;
  }

  .feature__number {
    margin-bottom: 18px;
  }

  .field-row,
  .batch-options,
  .calc-form__row {
    grid-template-columns: minmax(0, 1fr);
  }

  .input-row {
    flex-wrap: wrap;
  }

  .input-row input {
    width: 100%;
    flex: 1 0 100%;
  }

  .input-row .btn {
    width: 100%;
  }

  .section-head__body p,
  .lead,
  .page-hero__lead,
  .content-page__lead,
  .article-hero__lead {
    font-size: 15px;
    line-height: 1.85;
  }

  .page-hero {
    padding-top: 27px;
  }

  .page-hero h1 {
    font-size: clamp(32px, 8vw, 44px);
  }

  .batch-tool__head,
  .batch-tool__body,
  .tz-tool {
    padding: 18px;
  }

  .batch-form textarea {
    min-height: 210px;
  }

  .batch-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .tz-form {
    grid-template-columns: minmax(0, 1fr);
  }

  .tz-form .btn {
    grid-column: auto;
  }

  .zone-live {
    grid-template-columns: minmax(0, 1fr);
  }

  .zone-clock {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: baseline;
    gap: 3px 18px;
    padding: 12px 15px;
  }

  .zone-clock__name {
    margin: 0;
  }

  .zone-clock__meta {
    grid-column: 1;
  }

  .zone-clock__time {
    grid-column: 2;
    grid-row: 1 / span 2;
    font-size: 19px;
    text-align: right;
  }

  .zone-result {
    min-height: 0;
    padding: 14px;
  }

  .zone-result__time {
    font-size: 20px;
  }

  .article-layout {
    padding-top: 27px;
  }

  .prose h2 {
    margin-top: 36px;
  }

  .prose p,
  .prose ul,
  .prose ol {
    font-size: 15px;
  }

  .footer__top {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .footer__brand {
    grid-column: auto;
  }

  .site-footer {
    padding-top: 36px;
  }

  .to-top {
    right: 18px;
    bottom: 18px;
  }

  .toast {
    right: 18px;
    bottom: 18px;
  }

  .cta__actions .btn {
    width: 100%;
  }

  .not-found {
    min-height: 60vh;
    padding-block: 54px;
  }
}

@media (max-width: 420px) {
  .brand__text {
    gap: 0;
  }

  .brand__name {
    font-size: 14px;
  }

  .brand__en {
    font-size: 8px;
  }

  .hero__meta {
    font-size: 9px;
    letter-spacing: 0.1em;
  }

  .live__number {
    font-size: 28px;
  }

  .converter__foot {
    padding-inline: 18px;
  }

  .result__sub {
    display: block;
  }

  .result__sub span {
    display: block;
  }

  .result__sub span + span::before {
    display: none;
  }

  .batch-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .batch-stat {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
  }

  .batch-stat__value {
    margin: 0;
    font-size: 21px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .to-top,
  .toast,
  .tab-link,
  .converter__quick {
    display: none !important;
  }

  .site-main {
    margin-left: 0;
  }

  .wrap {
    width: 100%;
  }

  .converter,
  .result {
    break-inside: avoid;
  }
}

/* 运行期补充：组件细节 */
.zone-clock__offset {
  display: inline-block;
  margin-left: 4px;
  color: var(--color-muted);
  font-family: var(--font-en);
  font-size: 9px;
  font-weight: 400;
  letter-spacing: 0.04em;
  vertical-align: 1px;
}

.batch-tool > .batch-result {
  margin-top: 0;
  padding: 18px 27px 27px;
  border-top: 1px solid var(--color-line);
}

.batch-result__head h3 {
  font-size: 16px;
}

.tz-tool .result__error {
  margin-top: 18px;
}

.zone-result__place .zone-day {
  margin-left: 5px;
}

.not-found__links .small {
  color: var(--color-primary);
  text-decoration: none;
}

@media (max-width: 767px) {
  .batch-tool > .batch-result {
    padding: 18px;
  }
}

@media (max-width: 767px) {
  .calc-result__grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.tool__noscript {
  margin: 0;
  padding: 12px 36px;
  border-bottom: 1px solid var(--color-line);
  background: #fff8dc;
  color: #5d4b00;
  font-size: 12px;
  line-height: 1.7;
}

@media (max-width: 767px) {
  .tool__noscript {
    padding: 10px 18px;
  }
}

.split--unit {
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 36px;
}

.split--unit .section-title {
  font-size: clamp(28px, 2.65vw, 38px);
}

.data-table--compact {
  min-width: 0;
}

.data-table--compact th,
.data-table--compact td {
  padding-right: 9px;
  padding-left: 9px;
}

.data-table--compact td {
  font-size: 12px;
}

@media (max-width: 1279px) {
  .split--unit {
    grid-template-columns: minmax(0, 1fr);
    gap: 27px;
  }

  .split--unit .split__aside {
    margin-top: 9px;
  }
}

@media (max-width: 767px) {
  .data-table--compact {
    min-width: 560px;
  }
}

/* ==========================================================================
   转换器交互优化 v2：更直白的步骤、更高对比度和更大的操作区域
   ========================================================================== */

.converter__top {
  grid-template-columns: minmax(0, 1fr) 360px;
}

.converter__title {
  padding: 22px 27px;
}

.converter__title h2 {
  font-size: clamp(24px, 2.2vw, 28px);
}

.converter__intro {
  max-width: 620px;
  margin: 5px 0 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.7;
}

.live {
  padding: 18px 21px;
  background: #f5f8fc;
}

.live__head {
  font-size: 10px;
}

.live__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
}

.live__label {
  flex: 0 0 auto;
  color: var(--color-muted);
  font-size: 10px;
  line-height: 1.4;
}

.live__number {
  width: auto;
  flex: 0 0 auto;
  margin: 0;
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.live__small {
  min-height: 30px;
  padding: 4px 8px;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: #fff;
  color: var(--color-text-soft);
  font-size: 10px;
  line-height: 1.4;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.live__small:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  opacity: 1;
}

.live__meta {
  margin-top: 6px;
  font-size: 10px;
}

.live__actions {
  display: none;
}

.converter__tabs {
  background: #fff;
}

.tab {
  min-height: 48px;
  padding: 11px 24px;
  border-bottom: 3px solid transparent;
  color: var(--color-text-soft);
  font-size: 13px;
}

.tab.is-active {
  background: var(--color-primary-soft);
  border-bottom-color: var(--color-primary);
}

.tab-link {
  padding: 11px 24px;
}

.tab-panel {
  padding: 24px;
}

.converter__grid {
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  gap: 27px;
  align-items: stretch;
}

.converter__form {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--color-line);
  background: #fcfcfd;
}

.step-block {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  padding: 0 0 16px;
  margin: 0 0 16px;
  border-bottom: 1px solid var(--color-line);
}

.step-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.step-badge {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  margin-top: 1px;
  background: var(--color-primary);
  color: #fff;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
}

.step-block__body {
  min-width: 0;
}

.step-block__title {
  display: block;
  margin: 0 0 8px;
  color: var(--color-text);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.5;
}

.step-block .field-help {
  margin-top: 7px;
}

.step-block .preset-row {
  margin: 12px 0 0;
}

.step-block .field-row {
  gap: 12px;
}

.step-block .field label {
  font-size: 12px;
}

.converter__form input,
.converter__form select {
  min-height: 44px;
  font-size: 14px;
}

.converter__form #timestampInput {
  font-family: var(--font-mono);
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.converter__form .input-row .btn {
  min-height: 44px;
  font-size: 12px;
}

.converter__submit {
  width: 100%;
  margin-top: 0;
}

.converter__zone-note {
  display: block;
  margin: 8px 0 0;
  padding: 0;
  border: 0;
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.7;
}

.converter__zone-note strong {
  color: var(--color-text-soft);
}

.result {
  min-height: 0;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  background: #fff;
}

.result__head {
  align-items: flex-start;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-line);
}

.result__label {
  margin: 0;
  color: var(--color-primary);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.result__zone {
  margin: 2px 0 0;
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 400;
}

.result__date {
  margin-bottom: 3px;
  font-size: clamp(24px, 2.3vw, 32px);
  line-height: 1.35;
}

.result__sub {
  gap: 4px 14px;
  margin-bottom: 18px;
  font-size: 12px;
}

.result__sub span + span::before {
  margin-right: 14px;
}

.result__grid {
  margin-top: 0;
}

.result__grid dt {
  font-size: 10px;
  letter-spacing: 0.02em;
  text-transform: none;
}

.result__grid dd {
  font-size: 12px;
}

.copy-mini {
  width: 26px;
  height: 26px;
}

.result__formats {
  margin-top: 14px;
}

.result__format {
  grid-template-columns: 76px minmax(0, 1fr) 26px;
  padding: 7px 0;
}

.result__format > span {
  font-size: 10px;
  letter-spacing: 0;
  text-transform: none;
}

.result__format code {
  font-size: 11px;
}

.result__empty {
  min-height: 300px;
  border: 1px dashed var(--color-line);
  background: #fbfcfd;
}

.result__empty strong {
  margin-bottom: 3px;
  font-size: 16px;
}

@media (max-width: 1279px) {
  .converter__top {
    grid-template-columns: minmax(0, 1fr);
  }

  .live {
    border-top: 1px solid var(--color-primary-line);
    border-left: 0;
  }

  .converter__grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 767px) {
  .converter__title {
    padding: 18px;
  }

  .live {
    padding: 16px 18px;
  }

  .live__number {
    font-size: 22px;
  }

  .live__small {
    padding: 4px 7px;
  }

  .tab-panel {
    padding: 14px;
  }

  .converter__form {
    padding: 14px;
  }

  .converter__grid {
    gap: 14px;
  }

  .step-block {
    grid-template-columns: 22px minmax(0, 1fr);
    gap: 8px;
    padding-bottom: 14px;
    margin-bottom: 14px;
  }

  .step-badge {
    width: 22px;
    height: 22px;
    font-size: 11px;
  }

  .result {
    padding: 16px;
  }

  .result__empty {
    min-height: 220px;
  }

  .result__date {
    font-size: 23px;
  }
}

/* 转换器可读性微调 */
.step-block__title {
  font-size: 14px;
}

.live__head,
.live__label,
.live__meta {
  font-size: 11px;
}

.live__small {
  font-size: 11px;
}

.result__label,
.result__zone {
  font-size: 12px;
}

.result__grid dt {
  font-size: 11px;
}

.result__grid dd {
  font-size: 13px;
}

.result__format > span {
  font-size: 11px;
}

.result__format code {
  font-size: 12px;
}

.result__result-label {
  margin: 0 0 2px;
  color: var(--color-muted);
  font-size: 11px;
  line-height: 1.5;
}

.result__context {
  margin: 0 0 9px;
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  font-variant-numeric: tabular-nums;
}