/* ==========================================================================
   闪算 FlashCalc · 设计系统
   无框架、无构建、无 CDN：一个 CSS 文件，深浅色靠 [data-theme] + CSS 变量。
   结构：tokens → reset → 布局 → 导航 → 卡片 → 表单 → 结果视图 → 图表 → 页脚 → 响应式
   ========================================================================== */

/* ---------- tokens · Corporate Clean ---------- */
:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --surface-3: #f1f5f9;
  --paper: #ffffff;
  --text: #111827;
  --text-2: #374151;
  --muted: #6b7280;
  --line: #e5e7eb;
  --line-2: #d1d5db;
  --input-bg: #f9fafb;
  --input-text: #111827;

  --accent: #2563eb;
  --accent-ink: #1d4ed8;
  --accent-soft: #eff6ff;
  --amber: #d97706;

  --tone-good: #16a34a;
  --tone-warn: #d97706;
  --tone-bad: #dc2626;
  --tone-accent: var(--accent);

  --chart-1: #2563eb;
  --chart-2: #0f766e;
  --chart-3: #64748b;
  --chart-4: #d97706;

  --radius: 0.75rem;
  --radius-sm: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.1), 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);

  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --display: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;

  --wrap: 1180px;
  --head-h: 64px;
  --dur: 150ms;
}

html[data-theme='dark'] {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #1e293b;
  --surface-3: #334155;
  --paper: #1e293b;
  --text: #f8fafc;
  --text-2: #e2e8f0;
  --muted: #94a3b8;
  --line: #334155;
  --line-2: #475569;
  --input-bg: #0f172a;
  --input-text: #f8fafc;
  --accent: #3b82f6;
  --accent-ink: #93c5fd;
  --accent-soft: rgba(59, 130, 246, 0.16);
  --amber: #fbbf24;
  --tone-good: #4ade80;
  --tone-warn: #fbbf24;
  --tone-bad: #f87171;
  --tone-accent: var(--accent);
  --chart-1: #60a5fa;
  --chart-2: #2dd4bf;
  --chart-3: #94a3b8;
  --chart-4: #fbbf24;
  --shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.4);
  --shadow: 0 1px 3px rgba(2, 6, 23, 0.45);
  --shadow-md: 0 4px 8px rgba(2, 6, 23, 0.45);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  html[data-theme='auto'] {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-2: #1e293b;
    --surface-3: #334155;
    --paper: #1e293b;
    --text: #f8fafc;
    --text-2: #e2e8f0;
    --muted: #94a3b8;
    --line: #334155;
    --line-2: #475569;
    --input-bg: #0f172a;
    --input-text: #f8fafc;
    --accent: #3b82f6;
    --accent-ink: #93c5fd;
    --accent-soft: rgba(59, 130, 246, 0.16);
    --amber: #fbbf24;
    --tone-good: #4ade80;
    --tone-warn: #fbbf24;
    --tone-bad: #f87171;
    --chart-1: #60a5fa;
    --chart-2: #2dd4bf;
    --chart-3: #94a3b8;
    --chart-4: #fbbf24;
    --shadow-sm: 0 1px 2px rgba(2, 6, 23, 0.4);
    --shadow: 0 1px 3px rgba(2, 6, 23, 0.45);
    --shadow-md: 0 4px 8px rgba(2, 6, 23, 0.45);
    color-scheme: dark;
  }
}

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

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

body {
  margin: 0;
  overflow-x: clip;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--display);
  line-height: 1.28;
  letter-spacing: -0.02em;
  font-weight: 600;
}

h1 {
  font-size: clamp(1.7rem, 1.1rem + 2.4vw, 2.5rem);
}
h2 {
  font-size: clamp(1.28rem, 1rem + 1.1vw, 1.62rem);
}
h3 {
  font-size: 1.06rem;
}

p {
  margin: 0 0 0.85em;
}

a {
  color: var(--accent);
  text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent);
  text-underline-offset: 3px;
}
a:hover {
  color: var(--accent-ink);
}

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

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

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.i {
  width: 22px;
  height: 22px;
  flex: none;
}
.i-sm {
  width: 15px;
  height: 15px;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 99;
  padding: 10px 16px;
  background: var(--accent);
  color: var(--paper);
  border-radius: 0 0 1.25rem 1.25rem;
}
.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

@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;
  }
}

/* ---------- 布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(18px, 3vw, 34px) clamp(14px, 4vw, 30px) 72px;
}

.wrap-wide {
  max-width: 1280px;
}

.block {
  margin-top: clamp(34px, 5vw, 58px);
}

.block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.block-head p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.crumbs {
  font-size: 0.84rem;
  color: var(--muted);
  margin-bottom: 14px;
}
.crumbs ul,
.crumbs ol {
  display: inline;
}
.crumbs li {
  display: inline;
  list-style: none;
}
.crumbs a {
  color: var(--muted);
  text-decoration: none;
}
.crumbs a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* ---------- 头部导航 ---------- */
.head {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}

.head-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  min-height: var(--head-h);
  padding-inline: clamp(14px, 4vw, 30px);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 26px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 36px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  font-family: var(--display);
  font-weight: 600;
  font-size: 16px;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-text b {
  font-size: 1rem;
  letter-spacing: 0.02em;
}
.brand-text i {
  font-style: normal;
  font-size: 0.78rem;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-link {
  padding: 7px 11px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.93rem;
  white-space: nowrap;
}
.nav-link:hover {
  background: var(--surface-3);
  color: var(--text);
}

.nav-pop {
  position: relative;
}
.nav-pop > summary {
  list-style: none;
  cursor: pointer;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.93rem;
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-pop > summary::-webkit-details-marker {
  display: none;
}
.nav-pop > summary:hover,
.nav-pop[open] > summary {
  background: var(--surface-3);
  color: var(--text);
}
.nav-panel {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  z-index: 50;
  width: min(600px, calc(100vw - 28px));
  max-height: min(70vh, calc(100dvh - var(--head-h) - 28px));
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 14px;
  padding: 16px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  animation: pop var(--dur) ease-out;
}
@keyframes pop {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
}
.nav-group-title {
  margin: 0 0 6px;
  font-family: var(--display);
  font-size: 0.92rem;
  color: var(--text-2);
}
.nav-group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-group a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 7px;
  border-radius: 7px;
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.9rem;
}
.nav-group a:hover,
.nav-group a[aria-current='page'] {
  background: var(--accent-soft);
  color: var(--accent-ink);
}
.nav-i {
  width: 16px;
  height: 16px;
  opacity: 0.75;
}

.head-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--text);
  font-size: 0.87rem;
  text-decoration: none;
  white-space: nowrap;
}
.chip.ghost {
  background: transparent;
  color: var(--text-2);
}
.chip:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
}

.icon-btn {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--surface);
  cursor: pointer;
  color: var(--text-2);
  transition: color var(--dur), border-color var(--dur), transform var(--dur);
}
.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.moon-i {
  display: none;
}
html[data-theme='dark'] .sun-i {
  display: none;
}
html[data-theme='dark'] .moon-i {
  display: block;
}
@media (prefers-color-scheme: dark) {
  html[data-theme='auto'] .sun-i {
    display: none;
  }
  html[data-theme='auto'] .moon-i {
    display: block;
  }
}

/* ---------- 首页 hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
  padding: clamp(18px, 4vw, 44px) 0 clamp(8px, 2vw, 20px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 14px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 500;
}

.hero h1 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 1.1rem + 3.6vw, 3.3rem);
  font-weight: 600;
}
.hero h1 em {
  font-style: normal;
  position: relative;
  color: var(--accent);
}
.hero h1 em::after {
  content: none;
}

.lede {
  color: var(--text-2);
  font-size: 1.02rem;
  max-width: 56ch;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 16px;
}
.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  text-decoration: none;
  transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}
.hero-pill:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.hero-stat {
  font-size: 0.86rem;
  color: var(--muted);
}
.hero-stat b {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.05rem;
  color: var(--text);
}

.hero-card {
  padding: clamp(22px, 2.4vw, 28px);
  border-radius: var(--radius);
  background: var(--paper);
  border: 1px solid var(--line);
}
.hero-card-kicker {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: 0.95rem;
  color: var(--accent-ink);
}
.hero-card h3 {
  margin-bottom: 6px;
  font-size: 1.3rem;
}
.hero-card p {
  color: var(--text-2);
}
.hero-card-foot {
  margin: 14px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--text-2);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: background-color 150ms ease-out, color 150ms ease-out, border-color 150ms ease-out, box-shadow 150ms ease-out, transform 150ms ease-out;
}
.btn:hover {
  border-color: var(--line-2);
  color: var(--text);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.btn:active {
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-sm);
}
.btn.primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}
.btn.primary:hover {
  background: var(--accent-ink);
  color: #fff;
}
.btn.ghost {
  background: transparent;
  color: var(--text-2);
}
.btn.small {
  padding: 8px 16px;
  font-size: 0.88rem;
}
.btn.wide {
  width: 100%;
}
.btn[disabled] {
  opacity: 0.55;
  pointer-events: none;
}

/* ---------- 工具卡片 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: clamp(18px, 2.2vw, 26px);
}
.grid-dense {
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: clamp(16px, 2vw, 22px);
}

.card {
  position: relative;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 200ms ease-out, box-shadow 200ms ease-out;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-link {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 22px 22px 20px;
  text-decoration: none;
  color: inherit;
}
.card-icon {
  width: 40px;
  height: 40px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  transition: background-color 200ms ease-out, color 200ms ease-out, transform 200ms ease-out;
}
.card:hover .card-icon {
  background: var(--accent);
  color: #fff;
  transform: scale(1.1);
}
.card-icon .i {
  width: 21px;
  height: 21px;
}
.card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.card-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
}
.card-tagline {
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.5;
}
.card-meta {
  font-size: 0.76rem;
  color: var(--muted);
  opacity: 0.85;
}
.card-go {
  margin-left: auto;
  color: var(--muted);
  opacity: 0;
  transition: opacity 180ms ease, color 180ms ease;
}
.card:hover .card-go {
  opacity: 1;
  color: var(--accent);
}

.flame {
  font-style: normal;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 1px 5px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--amber) 22%, transparent);
  color: var(--amber);
}

.mini-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 1.25rem;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--text-2);
  font-size: 0.9rem;
  text-decoration: none;
  transition: border-color 180ms ease, color 180ms ease, background-color 180ms ease;
}
.mini-card:hover {
  border-color: var(--accent);
  color: var(--accent-ink);
  background: var(--surface);
}

/* ---------- 工具页 ---------- */
.tool-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.tool-head h1 {
  display: flex;
  align-items: center;
  gap: 9px;
}
.tool-tagline {
  margin: 6px 0 0;
  color: var(--muted);
}
.tool-chip {
  margin: 0;
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  background: var(--surface-3);
  color: var(--muted);
  font-size: 0.8rem;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(16px, 2.4vw, 28px);
  align-items: start;
}
.tool-layout.is-split {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: stretch;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  overflow: hidden;
}
.tool-form-col,
.tool-result-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}
.tool-form-col {
  position: sticky;
  top: calc(var(--head-h) + 16px);
}
.tool-layout.is-split .tool-form-col,
.tool-layout.is-split .tool-result-col {
  position: static;
  gap: 8px;
  padding: 12px 14px 14px;
}
.tool-layout.is-split .tool-form-col {
  border-right: 1px solid var(--line);
}
.tool-layout.is-split .form {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}
.pane-head {
  margin: 0;
  font-family: var(--display);
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
}
.pane-head-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.pane-head-row .share-bar {
  margin: 0;
  padding: 6px 10px;
}
.share-bar-local {
  gap: 8px;
}
.share-bar-local .privacy-note {
  margin: 0;
  padding: 0;
  background: transparent;
  border: 0;
  font-size: 0.78rem;
}
@media (max-width: 940px) {
  .tool-form-col {
    position: static;
  }
  .tool-layout.is-split {
    grid-template-columns: 1fr;
  }
}

/* ---------- 表单 ---------- */
.form {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: clamp(20px, 2.4vw, 28px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper);
}
.form-group + .form-group {
  margin-top: 4px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}
.group-title {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 1rem;
  color: var(--text-2);
}
.form-advanced {
  margin: 0;
  padding: 0;
  border: 0;
}
.form-advanced > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 1rem;
  color: var(--text-2);
  font-weight: 500;
  user-select: none;
}
.form-advanced > summary::-webkit-details-marker {
  display: none;
}
.form-advanced > summary::before {
  content: '';
  width: 0.45em;
  height: 0.45em;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}
.form-advanced[open] > summary::before {
  transform: rotate(45deg);
}
.form-advanced > summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
.form-advanced[open] > summary {
  color: var(--text-2);
}
.form-advanced > .form-grid {
  padding-bottom: 2px;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px 14px;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}
.field-seg,
.field-wide,
.field-date {
  /* 日期三联本身就宽，不能和别的字段并排，否则 Chrome 会把溢出叠到相邻格子上 */
  grid-column: 1 / -1;
}
.field-toggle:has(.field-help) {
  /* 开关旁边还有说明时必须整行，否则轨道会被挤成圆、文字折成两截 */
  grid-column: 1 / -1;
}
.field-label {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-2);
}
.field-unit {
  font-style: normal;
  font-weight: 500;
  font-size: 0.74rem;
  color: var(--muted);
}
.field-help {
  margin: 0;
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.45;
}

.input-shell {
  position: relative;
  display: flex;
  align-items: center;
}
.input {
  width: 100%;
  min-height: 46px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--input-bg);
  color: var(--input-text);
  font-family: var(--font);
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  line-height: 1.3;
  transition: border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
  appearance: none;
}
.input::placeholder {
  color: #9ca3af;
}
.input:hover {
  border-color: #9ca3af;
}
.input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 4px #3b82f6;
}
.input.is-bad {
  border-color: var(--tone-bad);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--tone-bad) 18%, transparent);
}
.input[type='number'] {
  -moz-appearance: textfield;
}
.input[type='number']::-webkit-outer-spin-button,
.input[type='number']::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.input-shell:has(.input-unit) .input {
  padding-right: 6.6rem;
}
.input-unit {
  position: absolute;
  right: 16px;
  max-width: 6rem;
  font-size: 0.78rem;
  line-height: 1.2;
  text-align: right;
  color: var(--muted);
  pointer-events: none;
  white-space: nowrap;
}
input[type='date'].input {
  font-family: var(--font);
  padding-right: 12px;
}
.date-triad {
  display: grid;
  /* 可收缩：占满整行时再按比例分；禁止硬性 min 撑破父级 */
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
}
.date-part {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.date-part-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
}
.date-part .select-input,
.date-part select.input {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
  padding-left: 10px;
  padding-right: 28px;
  background-position: right 8px center;
  background-size: 14px;
  font-variant-numeric: tabular-nums;
}
.select-input,
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><path d='m6 9 6 6 6-6'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 36px;
  cursor: pointer;
}
.select-input:hover,
select.input:hover {
  border-color: #9ca3af;
}
@media (max-width: 560px) {
  .date-triad {
    grid-template-columns: 1fr;
  }
}
textarea.input {
  font-family: var(--font);
  border-radius: var(--radius);
  resize: vertical;
  min-height: 96px;
  line-height: 1.6;
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.seg {
  position: relative;
  display: inline-flex;
}
.seg > input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}
.seg > span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-2);
  background: var(--input-bg);
  color: var(--text-2);
  font-size: 0.92rem;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}
.seg:hover > span {
  border-color: var(--accent);
}
.seg > input:checked + span {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
/* radio 本体不可见，所以把键盘焦点圈画到它后面的 span 上，否则 Tab 过去看不见 */
.seg > input:focus-visible + span {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.field-toggle {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.field-toggle .field-help {
  /* 说明跟在开关下方，并与文字标签左对齐（越过轨道宽度） */
  padding-left: 47px;
}
.switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
  max-width: 100%;
  cursor: pointer;
  color: var(--text-2);
  font-size: 0.88rem;
}
.switch > input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.switch-track {
  flex: 0 0 38px;
  width: 38px;
  min-width: 38px;
  height: 22px;
  border-radius: 999px;
  background: var(--surface-3);
  border: 1px solid var(--line-2);
  position: relative;
  overflow: hidden;
  transition: background var(--dur), border-color var(--dur);
}
.switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--muted);
  transition: transform 180ms ease, background-color 180ms ease;
}
.switch > input:checked + .switch-track {
  background: var(--accent);
  border-color: var(--accent);
}
.switch > input:checked + .switch-track .switch-thumb {
  transform: translateX(16px);
  background: var(--paper);
}
.switch > input:focus-visible + .switch-track {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.switch-label {
  font-weight: 500;
  line-height: 1.35;
}

.form-foot {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.form-status {
  font-size: 0.82rem;
  color: var(--muted);
}
.form-status.is-busy {
  color: var(--amber);
}
.form-status.is-bad {
  color: var(--tone-bad);
}
.form-error {
  margin: 0;
  padding: 10px 13px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--tone-bad) 12%, transparent);
  color: var(--tone-bad);
  font-size: 0.88rem;
  border: 1px solid color-mix(in srgb, var(--tone-bad) 35%, transparent);
}
.form-ok {
  margin: 0;
  padding: 10px 13px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--tone-good) 12%, transparent);
  color: var(--tone-good);
  font-size: 0.88rem;
  border: 1px solid color-mix(in srgb, var(--tone-good) 32%, transparent);
}
.honeypot {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  opacity: 0;
}

/* ---------- 结果面板 ---------- */
.result {
  /* 隔离结果区重排/重绘，避免每次重算拖累表单列与整页 */
  contain: layout paint style;
}
.focus-timer {
  text-align: center;
}
.focus-kicker {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 650;
  color: var(--muted);
}
.focus-clock {
  margin: 8px 0 4px;
  font-family: var(--display);
  font-size: clamp(3.2rem, 8vw, 5.4rem);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--accent);
}
.focus-timer.is-break .focus-clock {
  color: var(--tone-good, #15803d);
}
.focus-timer.is-done .focus-clock {
  color: var(--text);
}
.focus-meta {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.86rem;
}
.focus-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}
.focus-exit {
  display: none;
}
html.is-focus-stage {
  overflow: hidden;
}
html.is-focus-stage body > *:not(.focus-stage-host),
html.is-focus-stage .site-header,
html.is-focus-stage .site-footer,
html.is-focus-stage .tool-head,
html.is-focus-stage .tool-form-col,
html.is-focus-stage .related,
html.is-focus-stage .ads,
html.is-focus-stage .intro,
html.is-focus-stage .method,
html.is-focus-stage .faq,
html.is-focus-stage .breadcrumb {
  visibility: hidden !important;
}
html.is-focus-stage .focus-stage-host {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  margin: 0;
  padding: clamp(24px, 6vh, 64px);
  border: 0;
  border-radius: 0;
  color: #e8eefc;
  background:
    radial-gradient(ellipse at 50% 30%, rgba(59, 130, 246, 0.18), transparent 55%),
    #070b16;
  box-shadow: none;
  visibility: visible !important;
}
html.is-focus-stage .focus-stage-host .focus-kicker,
html.is-focus-stage .focus-stage-host .focus-meta {
  color: rgba(232, 238, 252, 0.62);
}
html.is-focus-stage .focus-stage-host .focus-clock {
  color: #93c5fd;
}
html.is-focus-stage .focus-stage-host.is-break .focus-clock {
  color: #86efac;
}
html.is-focus-stage .focus-stage-host.is-done .focus-clock {
  color: #e8eefc;
}
html.is-focus-stage .focus-stage-host .btn.ghost {
  color: #e8eefc;
  border-color: rgba(232, 238, 252, 0.22);
  background: rgba(255, 255, 255, 0.04);
}
html.is-focus-stage .focus-stage-host .panel-title,
html.is-focus-stage .focus-stage-host .focus-inline-note {
  display: none;
}
html.is-focus-stage .focus-stage-host .focus-kicker {
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  letter-spacing: 0.08em;
  text-transform: none;
}
html.is-focus-stage .focus-stage-host .focus-clock {
  margin: 18px 0 10px;
  font-size: clamp(5.5rem, 22vw, 12rem);
}
html.is-focus-stage .focus-stage-host .focus-meta {
  margin-bottom: 28px;
  font-size: 1rem;
  opacity: 0.85;
}
html.is-focus-stage .focus-stage-host .focus-actions {
  opacity: 0.28;
  transition: opacity 180ms ease;
}
html.is-focus-stage .focus-stage-host:hover .focus-actions,
html.is-focus-stage .focus-stage-host:focus-within .focus-actions {
  opacity: 1;
}
html.is-focus-stage .focus-stage-host .focus-exit {
  display: inline-flex;
}
html.is-focus-stage .focus-stage-host [data-action='focus-stage'] {
  display: none;
}

/* ---------- 做决定：硬币 / 转盘 / 骰子 ---------- */
.pick-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}
.pick-result {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.55rem, 1.1rem + 1.6vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--accent);
  line-height: 1.2;
  overflow-wrap: anywhere;
}
.pick-result.is-big {
  font-size: clamp(2.4rem, 1.6rem + 3vw, 3.6rem);
  animation: pick-pop 520ms cubic-bezier(0.2, 0.9, 0.25, 1) both;
}
.pick-coin-face,
.pick-dice-face {
  width: min(9.5rem, 42vw);
  height: min(9.5rem, 42vw);
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 2px solid var(--line-strong, var(--line));
  background:
    radial-gradient(circle at 35% 30%, color-mix(in srgb, var(--accent) 22%, var(--paper)), var(--surface));
  box-shadow: inset 0 -8px 18px color-mix(in srgb, var(--text) 8%, transparent);
  animation: pick-flip 780ms cubic-bezier(0.2, 0.85, 0.25, 1) both;
}
.pick-coin-face span,
.pick-dice-face span {
  font-family: var(--display);
  font-size: clamp(1.4rem, 1rem + 1.5vw, 2rem);
  font-weight: 700;
  color: var(--text);
}
.pick-dice-face {
  border-radius: 1.35rem;
  animation-name: pick-shake;
}
.pick-wheel-wrap {
  position: relative;
  width: min(19rem, 86vw);
  height: min(19rem, 86vw);
  margin: 8px 0 4px;
}
.pick-wheel-pointer {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 2;
  width: 18px;
  height: 22px;
  background: var(--accent);
  border-radius: 3px 3px 2px 2px;
  clip-path: polygon(0 0, 100% 0, 50% 100%);
  transform: translateX(-50%);
  filter: drop-shadow(0 2px 2px color-mix(in srgb, var(--text) 18%, transparent));
}
.pick-wheel-disk {
  position: absolute;
  inset: 16px;
  border-radius: 50%;
  background: var(--paper);
  box-shadow:
    0 0 0 8px color-mix(in srgb, var(--paper) 92%, var(--text)),
    0 14px 32px color-mix(in srgb, var(--text) 12%, transparent);
  animation: pick-wheel-spin 1.35s cubic-bezier(0.12, 0.72, 0.08, 1) both;
}
.pick-wheel-svg {
  display: block;
  width: 100%;
  height: 100%;
}
.pick-slice.is-0 { fill: #3b6cff; }
.pick-slice.is-1 { fill: #5c87ff; }
.pick-slice.is-2 { fill: #7a6cf0; }
.pick-slice.is-3 { fill: #e08a3c; }
.pick-slice.is-4 { fill: #2ea87a; }
.pick-slice.is-5 { fill: #e06a8a; }
.pick-slice.is-6 { fill: #c9952a; }
.pick-slice.is-7 { fill: #3aa0c8; }
.pick-wheel-name {
  fill: #fff;
  font-family: var(--font);
  font-weight: 650;
  letter-spacing: 0.02em;
}
.pick-wheel-hub {
  fill: var(--paper);
  stroke: color-mix(in srgb, var(--text) 10%, var(--paper));
  stroke-width: 3;
}
@keyframes pick-wheel-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(calc(var(--turns) * 360deg + var(--land)));
  }
}
@keyframes pick-flip {
  0% {
    transform: rotateY(0) scale(0.86);
  }
  55% {
    transform: rotateY(540deg) scale(1.05);
  }
  100% {
    transform: rotateY(720deg) scale(1);
  }
}
@keyframes pick-shake {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg) scale(0.9);
  }
  20% {
    transform: translate3d(-6px, 2px, 0) rotate(-8deg);
  }
  40% {
    transform: translate3d(7px, -3px, 0) rotate(7deg);
  }
  60% {
    transform: translate3d(-4px, 2px, 0) rotate(-4deg);
  }
  100% {
    transform: translate3d(0, 0, 0) rotate(0deg) scale(1);
  }
}
@keyframes pick-pop {
  0% {
    transform: scale(0.7);
    opacity: 0.2;
  }
  70% {
    transform: scale(1.08);
    opacity: 1;
  }
  100% {
    transform: scale(1);
  }
}
@media (prefers-reduced-motion: reduce) {
  .pick-coin-face,
  .pick-dice-face,
  .pick-wheel-disk,
  .pick-result.is-big {
    animation: none;
  }
  .pick-wheel-disk {
    transform: rotate(var(--land));
  }
}
.panel {
  padding: clamp(18px, 2vw, 24px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper);
}
.code-block {
  margin: 0;
  padding: 14px 16px;
  max-height: min(52vh, 480px);
  overflow: auto;
  border-radius: 1.25rem;
  border: 1px solid var(--line);
  background: var(--surface-3);
  font-family: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
}
.code-block code {
  font: inherit;
  color: inherit;
}
.code-block:empty::before,
.code-block:has(code:empty)::before {
  content: '格式化结果会显示在这里';
  color: var(--muted);
}
.form-split {
  gap: 12px;
  height: 100%;
}
.form-split .form-toolbar {
  padding: 0;
  border: 0;
  margin: 0;
}
.form-split .form-toolbar + .form-group {
  margin: 0;
  padding: 0;
  border: 0;
}
.form-split .form-toolbar .form-grid {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  align-items: end;
}
.form-split .form-source {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.form-split .form-source .form-grid {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.form-split .form-source .field-wide {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.form-split .form-source .field-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
.form-split textarea.input {
  flex: 1;
  min-height: min(58vh, 520px);
  border-radius: 12px;
  border-color: transparent;
  background: var(--surface-3);
  font-family: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.65;
  resize: vertical;
}
.form-split textarea.input:focus {
  border-color: var(--line);
  background: var(--paper);
}
.result-split {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.result-split > .panel:has(.code-block) {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: min(58vh, 520px);
  padding: 0;
  border: 0;
  background: transparent;
}
.result-split > .panel:has(.json-view) .panel-title,
.result-split > .panel:has(.json-view) .panel-note {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
.result-split .code-block {
  flex: 1;
  max-height: none;
  min-height: min(48vh, 420px);
  border-radius: 12px;
  background: var(--surface-3);
}
.result-split .code-block.is-source {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}
.json-view {
  --json-key: #1d4ed8;
  --json-str: #15803d;
  --json-num: #0f766e;
  --json-lit: #b45309;
  --json-punct: #4b5563;
  --json-guide: color-mix(in srgb, var(--line) 85%, #c45c7a);
  flex: 1;
  min-height: min(48vh, 420px);
  margin: 0;
  padding: 12px 14px 16px;
  overflow: auto;
  border-radius: 12px;
  background: var(--paper);
  font-family: ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
  font-size: 0.84rem;
  line-height: 1.7;
}
html[data-theme='dark'] .json-view {
  --json-key: #e08ad8;
  --json-str: #8fce9a;
  --json-num: #7eb6ff;
  --json-lit: #e3b15a;
  --json-punct: #f0a0b4;
  --json-guide: color-mix(in srgb, var(--line) 70%, #f0a0b4);
}
@media (prefers-color-scheme: dark) {
  html[data-theme='auto'] .json-view {
    --json-key: #e08ad8;
    --json-str: #8fce9a;
    --json-num: #7eb6ff;
    --json-lit: #e3b15a;
    --json-punct: #f0a0b4;
    --json-guide: color-mix(in srgb, var(--line) 70%, #f0a0b4);
  }
}
.json-row {
  min-height: 1.7em;
}
.json-key {
  color: var(--json-key);
  font-weight: 700;
}
.json-str { color: var(--json-str); }
.json-num { color: var(--json-num); }
.json-lit { color: var(--json-lit); }
.json-punct { color: var(--json-punct); }
.json-kids {
  margin-left: 8px;
  padding-left: 14px;
  border-left: 1px solid var(--json-guide);
}
.json-fold {
  width: 16px;
  height: 16px;
  margin-right: 6px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: #e85d6c;
  color: #fff;
  font: inherit;
  line-height: 16px;
  vertical-align: -2px;
  cursor: pointer;
}
.json-fold::before {
  content: '−';
  font-size: 14px;
  font-weight: 700;
}
.json-node.is-collapsed > .json-row .json-fold::before {
  content: '+';
}
.json-omit {
  display: none;
  margin-left: 4px;
  color: var(--muted);
}
.json-node.is-collapsed > .json-row .json-omit {
  display: inline;
}
.json-node.is-collapsed > .json-kids,
.json-node.is-collapsed > .json-close {
  display: none;
}
.result-split > .panel:not(:has(.code-block)):not(.html-preview-panel) {
  padding: 8px 2px 0;
  border: 0;
  border-radius: 0;
  background: transparent;
}
.result-split > .panel.html-preview-panel {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: min(58vh, 520px);
  padding: 0;
  border: 0;
  background: transparent;
}
.html-preview-shell {
  flex: 1;
  display: flex;
  justify-content: center;
  min-height: min(48vh, 420px);
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    linear-gradient(45deg, color-mix(in srgb, var(--line) 55%, transparent) 25%, transparent 25%) 0 0 / 16px 16px,
    linear-gradient(-45deg, color-mix(in srgb, var(--line) 55%, transparent) 25%, transparent 25%) 0 0 / 16px 16px,
    var(--surface-3);
}
.html-preview-frame {
  width: 100%;
  min-height: min(46vh, 400px);
  height: 100%;
  border: 0;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 28px color-mix(in srgb, #000 12%, transparent);
}
.html-preview-shell.is-tablet .html-preview-frame {
  width: min(100%, 768px);
}
.html-preview-shell.is-phone .html-preview-frame {
  width: min(100%, 390px);
}
.html-preview-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 8px;
}
.html-preview-head .panel-title {
  margin: 0;
}
.html-preview-blank {
  flex: 0 0 auto;
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
}
.html-preview-panel .panel-note {
  margin-top: 8px;
}
.panel-title {
  margin: 0 0 13px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.panel-title::before {
  content: none;
}
.panel-note {
  margin: 12px 0 0;
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.6;
}

.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 11.5rem), 1fr));
  gap: 1px;
  background: var(--line);
  border-color: var(--line);
  overflow: hidden;
}
.stats-panel[data-columns='2'] {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.stats-panel[data-columns='3'] {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.stats-panel[data-columns='4'] {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
/* 主数字占一整行时，其余卡片按「列数 - 1」排满，避免末格空一块 */
.stats-panel[data-columns='2']:has(.stat.is-hero) {
  grid-template-columns: minmax(0, 1fr);
}
.stats-panel[data-columns='3']:has(.stat.is-hero) {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.stats-panel[data-columns='4']:has(.stat.is-hero) {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.stats-panel > * {
  background: var(--surface);
  padding: 15px 16px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  container-type: inline-size;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--muted);
  line-height: 1.35;
  overflow-wrap: anywhere;
}
.stat-value {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  font-size: clamp(0.95rem, 11cqi, 1.22rem);
  min-width: 0;
  max-width: 100%;
  overflow-wrap: anywhere;
  line-height: 1.25;
}
.stat-value .stat-unit {
  margin-left: 0.15em;
}
.stat-unit {
  font-style: normal;
  font-family: var(--font);
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--muted);
}
.stat-hint {
  font-size: 0.76rem;
  color: var(--muted);
}
.stat.is-md .stat-value {
  font-size: clamp(0.95rem, 11cqi, 1.22rem);
}
.stat.is-lg .stat-value {
  font-size: clamp(1.05rem, 13cqi, 1.55rem);
}
.stat.is-hero {
  /* 主数字独占一行，并排到结果区最上方 */
  order: -1;
  grid-column: 1 / -1;
}
.stat.is-hero .stat-value {
  /* 随卡片宽度缩放，长日期和长金额都留在格子里 */
  font-size: clamp(1.45rem, 7.2cqi, 2.45rem);
}
.stat.is-good .stat-value {
  color: var(--tone-good);
}
.stat.is-warn .stat-value {
  color: var(--tone-warn);
}
.stat.is-bad .stat-value {
  color: var(--tone-bad);
}
.stat.is-accent .stat-value {
  color: var(--accent);
}
.stat-value.flash {
  animation: flash 200ms ease-out;
}
@keyframes flash {
  0% {
    opacity: 0.35;
    transform: translateY(2px);
  }
}

/* ---------- 图表 ---------- */
.chart-svg {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}
.chart-grid {
  stroke: var(--line);
  stroke-width: 1;
}
.chart-axis {
  stroke: var(--line-2);
  stroke-width: 1.2;
}
.chart-tick {
  fill: var(--muted);
  font-size: 11px;
  font-family: var(--mono);
}
.chart-tick-x {
  font-family: var(--font);
}
.chart-ylab {
  fill: var(--muted);
  font-size: 11px;
}
.chart-line {
  fill: none;
  stroke-width: 2.4;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.chart-area {
  opacity: 0.13;
  stroke: none;
}
.chart-bar {
  opacity: 0.92;
}
.chart-bar:hover,
.chart-dot:hover {
  opacity: 1;
}
.chart-dot {
  stroke: var(--surface);
  stroke-width: 2;
}
.chart-legend-text {
  fill: var(--text-2);
  font-size: 11.5px;
}
.chart-empty {
  padding: 24px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.donut {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}
.donut-svg {
  width: 100%;
  height: auto;
}
.donut-track {
  stroke: var(--surface-3);
}
.donut-seg {
  stroke-linecap: butt;
  transition: opacity var(--dur);
}
.donut-center {
  grid-column: 1;
  margin-top: -6px;
  text-align: center;
}
.donut-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.donut-legend li {
  display: grid;
  grid-template-columns: 10px 1fr auto auto;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
}
.donut-legend b {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.donut-legend em {
  font-style: normal;
  color: var(--muted);
  font-size: 0.78rem;
  min-width: 42px;
  text-align: right;
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 3px;
  background: var(--chart-1);
}
.dot[data-tone='good'] {
  background: var(--tone-good);
}
.dot[data-tone='warn'] {
  background: var(--tone-warn);
}
.dot[data-tone='bad'] {
  background: var(--tone-bad);
}
.dot[data-tone='accent'] {
  background: var(--tone-accent);
}
.dot[data-tone^='chart-'] {
  background: var(--chart-1);
}
.dot[data-tone='chart-2'] {
  background: var(--chart-2);
}
.dot[data-tone='chart-3'] {
  background: var(--chart-3);
}
.dot[data-tone='chart-4'] {
  background: var(--chart-4);
}

.bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.bar-row {
  display: grid;
  grid-template-columns: minmax(78px, 0.34fr) minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  font-size: 0.86rem;
}
.bar-label {
  color: var(--text-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bar-track {
  height: 9px;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}
.bar-track > i {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--chart-1);
  transition: width 200ms ease-out;
}
.bar-value {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  white-space: nowrap;
}
.bar-row.is-good .bar-track > i {
  background: var(--tone-good);
}
.bar-row.is-warn .bar-track > i {
  background: var(--tone-warn);
}
.bar-row.is-bad .bar-track > i {
  background: var(--tone-bad);
}
.bar-row.is-accent .bar-track > i {
  background: var(--accent);
}

/* 人生百格图 */
.lifegrid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.lifegrid-cells {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 3px;
  max-width: 420px;
}
/* 列数用属性选择器而不是内联 style：CSP 下更干净，也不依赖 JS */
.lifegrid[data-columns='5'] .lifegrid-cells {
  grid-template-columns: repeat(5, 1fr);
}
.lifegrid[data-columns='12'] .lifegrid-cells {
  grid-template-columns: repeat(12, 1fr);
}
.lifegrid[data-columns='20'] .lifegrid-cells {
  grid-template-columns: repeat(20, 1fr);
}
.lifegrid .cell {
  aspect-ratio: 1;
  border-radius: 3px;
  background: var(--surface-3);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.lifegrid .cell > span {
  font-size: 8px;
  color: transparent;
  font-family: var(--mono);
}
.lifegrid .cell.is-done {
  background: color-mix(in srgb, var(--accent) 78%, var(--surface-3));
}
.lifegrid .cell.is-now {
  background: var(--amber);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--amber) 30%, transparent);
  transform: scale(1.14);
}
.lifegrid .cell.is-off {
  opacity: 0.35;
}
.lifegrid-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--muted);
}
.lifegrid-legend li {
  display: flex;
  align-items: center;
  gap: 5px;
}
.cal-month {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.cal-head,
.cal-week {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}
.cal-dow {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  padding: 4px 0;
}
.cal-day {
  position: relative;
  min-height: 64px;
  padding: 8px 6px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cal-day.is-empty {
  border-color: transparent;
  background: transparent;
}
.cal-day.is-weekend {
  background: var(--surface-2);
}
.cal-day.is-holiday {
  border-color: color-mix(in srgb, var(--tone-bad) 35%, var(--line));
  background: color-mix(in srgb, var(--tone-bad) 8%, var(--surface));
}
.cal-day.is-work {
  border-color: color-mix(in srgb, var(--tone-warn) 40%, var(--line));
  background: color-mix(in srgb, var(--tone-warn) 8%, var(--surface));
}
.cal-day.is-today {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 22%, transparent);
}
.cal-num {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.cal-lunar {
  font-size: 0.72rem;
  color: var(--muted);
  line-height: 1.3;
}
.cal-mark {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--tone-bad);
}
.cal-day.is-work .cal-mark {
  color: var(--tone-warn);
}
.cal-legend {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--muted);
}
.cal-legend li {
  display: flex;
  align-items: center;
  gap: 6px;
}
.cal-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--line);
  background: var(--surface);
}
.cal-swatch.is-holiday {
  background: color-mix(in srgb, var(--tone-bad) 18%, var(--surface));
  border-color: color-mix(in srgb, var(--tone-bad) 35%, var(--line));
}
.cal-swatch.is-work {
  background: color-mix(in srgb, var(--tone-warn) 18%, var(--surface));
  border-color: color-mix(in srgb, var(--tone-warn) 40%, var(--line));
}
.cal-swatch.is-today {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 22%, transparent);
}
.cal-swatch.is-weekend {
  background: var(--surface-2);
}
@media (max-width: 720px) {
  .cal-day {
    min-height: 54px;
    padding: 6px 4px 4px;
  }
  .cal-num {
    font-size: 0.86rem;
  }
  .cal-lunar {
    font-size: 0.64rem;
  }
}

.lifegrid-legend .cell {
  width: 11px;
  height: 11px;
  aspect-ratio: auto;
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}
.table caption {
  text-align: left;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 0.8rem;
  caption-side: top;
}
.table th,
.table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.table thead th {
  background: var(--surface-2);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  position: sticky;
  top: 0;
}
.table tbody tr:last-child td {
  border-bottom: 0;
}
.table tbody tr:hover td {
  background: var(--accent-soft);
}
.table .is-right {
  text-align: right;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.table .truncate {
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.table-more {
  padding: 8px 12px;
  font-size: 0.78rem;
  color: var(--muted);
  background: var(--surface-2);
}
.table-note {
  margin: 8px 12px 0;
  font-size: 0.78rem;
  color: var(--muted);
}

/* 对比卡 */
.compare {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}
.compare-card {
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface-2);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.compare-card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.compare-card h4 {
  font-size: 0.92rem;
}
.compare-card .stat-value {
  font-size: 1.02rem;
}
.compare-card.is-accent {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  background: var(--accent-soft);
}
.compare-card.is-good {
  border-color: color-mix(in srgb, var(--tone-good) 45%, var(--line));
}
.compare-card.is-warn {
  border-color: color-mix(in srgb, var(--tone-warn) 45%, var(--line));
}
.badge {
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--line-2);
  color: var(--muted);
  white-space: nowrap;
}

/* 步骤 */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.step {
  display: flex;
  gap: 11px;
  align-items: flex-start;
}
.step-no {
  width: 21px;
  height: 21px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 700;
  font-family: var(--mono);
}
.step > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.step b {
  font-size: 0.9rem;
  font-weight: 600;
}
.step em {
  font-style: normal;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-size: 0.86rem;
}
.step p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

/* 提示块 */
.callout {
  padding: 14px 16px;
  border-radius: 1.5rem;
  border: 1px solid var(--line);
  background: var(--surface-3);
}
.callout b {
  display: block;
  margin-bottom: 3px;
  font-family: var(--display);
  font-size: 0.95rem;
}
.callout p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.62;
  max-width: 68ch;
}
.callout.is-info,
.callout.is-accent {
  background: var(--accent-soft);
}
.callout.is-good {
  background: color-mix(in srgb, var(--tone-good) 14%, var(--paper));
}
.callout.is-warn {
  background: color-mix(in srgb, var(--amber) 14%, var(--paper));
}
.callout.is-bad {
  background: color-mix(in srgb, var(--tone-bad) 14%, var(--paper));
}

/* ---------- 分享 / 相关 ---------- */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px dashed var(--line-2);
  background: var(--surface-2);
}
.share-out {
  font-size: 0.82rem;
  color: var(--tone-good);
  min-width: 0;
  overflow-wrap: anywhere;
}
.privacy-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 12px 14px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.85rem;
}

.related {
  padding: 4px 0 0;
}
.related p {
  margin: 0 0 9px;
  font-family: var(--display);
  font-size: 1rem;
  color: var(--text-2);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.share-hero {
  padding: clamp(18px, 3vw, 30px);
  border-radius: var(--radius-lg);
  background: var(--paper);
  border: 1px solid var(--line);
  margin-bottom: 16px;
}
.share-hero h1 {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 1rem + 2.4vw, 2.4rem);
  margin: 6px 0 10px;
  color: var(--accent);
}
.share-meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0;
}
.result-share {
  margin-bottom: 14px;
}
.share-full {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.share-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding: 16px 18px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}
.share-cta p {
  margin: 0;
  font-weight: 600;
}

/* ---------- 广告位 ---------- */
.adslot {
  position: relative;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface-2);
  min-height: 96px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.adslot-label {
  position: absolute;
  top: -1px;
  right: 10px;
  transform: translateY(-50%);
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  background: var(--surface-3);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}
.adslot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.adslot-list a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 1.25rem;
  background: var(--paper);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color 180ms ease, background-color 180ms ease;
}
.adslot-list a:hover {
  border-color: var(--accent);
  background: var(--surface);
}
.adslot-list b {
  font-size: 0.88rem;
  color: var(--text);
}
.adslot-list span {
  font-size: 0.78rem;
  color: var(--muted);
}
.adslot ins.adsbygoogle {
  display: block;
  min-height: 90px;
}

.consent {
  position: fixed;
  inset-inline: 0;
  bottom: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px clamp(14px, 4vw, 30px);
  background: var(--surface);
  border-top: 1px solid var(--line);
  box-shadow: var(--shadow);
  font-size: 0.85rem;
}
.consent p {
  margin: 0;
  max-width: 68ch;
  color: var(--text-2);
}
.consent-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
body.consent-done .consent {
  display: none;
}

/* ---------- SEO 文本块 ---------- */
.seo-block {
  margin-top: clamp(30px, 4vw, 46px);
  scroll-margin-top: calc(var(--head-h) + 16px);
}
.seo-block h2 {
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.prose p {
  color: var(--text-2);
  max-width: 68ch;
}

.faq {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  overflow: hidden;
}
.faq-item summary {
  cursor: pointer;
  padding: 12px 15px;
  font-weight: 600;
  font-size: 0.93rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: '+';
  font-family: var(--mono);
  color: var(--muted);
  font-size: 1.1rem;
  transition: transform var(--dur);
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
}
.faq-item[open] summary {
  color: var(--accent-ink);
}
.faq-a {
  padding: 0 15px 13px;
  color: var(--text-2);
  font-size: 0.9rem;
}

.method {
  margin: 0;
  padding-left: 20px;
  color: var(--text-2);
  font-size: 0.9rem;
}
.method li {
  margin-bottom: 6px;
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* ---------- 账号 / 表单页 ---------- */
.auth-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: center;
  max-width: 940px;
  margin-inline: auto;
  padding-top: clamp(10px, 3vw, 34px);
}
.auth-card h1 {
  margin-bottom: 8px;
}
.auth-form {
  margin-top: 16px;
}
.auth-alt {
  margin-top: 14px;
  font-size: 0.87rem;
  color: var(--muted);
}
.auth-side h2 {
  margin-bottom: 12px;
}
.ticks {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
  font-size: 0.9rem;
  color: var(--text-2);
}
.ticks li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.ticks .i {
  color: var(--tone-good);
  margin-top: 3px;
}

.page-head {
  padding-top: clamp(6px, 2vw, 20px);
  margin-bottom: 22px;
}
.page-head h1 {
  margin-bottom: 8px;
}

.me-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 14px;
}
.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}
.list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.88rem;
}
.list li:last-child {
  border-bottom: 0;
}
.list b {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list time {
  color: var(--muted);
  font-size: 0.78rem;
  font-family: var(--mono);
}

/* ---------- 后台 ---------- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.kpi {
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.kpi span {
  font-size: 0.8rem;
  color: var(--muted);
}
.kpi b {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.5rem;
  color: var(--accent);
}
.spark {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  height: 120px;
}
.spark li {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  min-width: 0;
}
.spark i {
  display: block;
  width: 100%;
  height: var(--h, 4%);
  min-height: 2px;
  border-radius: 3px 3px 0 0;
  background: var(--accent);
}
.spark span {
  font-size: 0.6rem;
  color: var(--muted);
  white-space: nowrap;
  transform: rotate(-40deg);
  transform-origin: center;
}

/* ---------- 错误页 / 空状态 ---------- */
.bare {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}
.error-shell {
  text-align: center;
  max-width: 460px;
}
.error-code {
  font-family: var(--mono);
  font-size: clamp(3rem, 1rem + 12vw, 6rem);
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  opacity: 0.28;
  margin: 0;
}
.error-shell h1 {
  margin: 0 0 10px;
}
.error-shell .muted {
  font-size: 0.82rem;
}
.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}
.nf {
  padding: clamp(8px, 2vw, 20px) 0 clamp(28px, 5vw, 48px);
}
.nf-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(20px, 4vw, 48px);
  align-items: center;
  min-height: min(52vh, 420px);
  padding: clamp(18px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 4px);
  background:
    radial-gradient(120% 90% at 8% 10%, color-mix(in srgb, var(--accent) 14%, transparent), transparent 55%),
    linear-gradient(160deg, var(--surface) 0%, var(--surface-2) 100%);
  overflow: hidden;
}
.nf-mark {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 180px;
}
.nf-mark-num {
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-size: clamp(4.5rem, 3rem + 8vw, 7.5rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.9;
  color: var(--accent);
  animation: nf-rise 520ms ease both;
}
.nf-mark-ring {
  position: absolute;
  inset: 12% 8%;
  border: 1px dashed color-mix(in srgb, var(--accent) 35%, var(--line));
  border-radius: 50%;
  animation: nf-spin 28s linear infinite;
}
.nf-copy {
  display: grid;
  gap: 12px;
  animation: nf-rise 620ms 60ms ease both;
}
.nf-kicker {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--accent-ink);
}
.nf-copy h1 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 1.2rem + 2.2vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.nf-lede {
  margin: 0;
  max-width: 36ch;
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.65;
}
.nf-path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}
.nf-path code {
  max-width: min(100%, 34rem);
  padding: 4px 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--text-2);
  font-family: var(--mono);
  font-size: 0.78rem;
}
.nf-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
.nf-suggest {
  margin-top: clamp(28px, 5vw, 44px);
  animation: nf-rise 700ms 120ms ease both;
}
@keyframes nf-rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes nf-spin {
  to { transform: rotate(360deg); }
}
@media (max-width: 820px) {
  .nf-hero {
    grid-template-columns: 1fr;
    min-height: 0;
    text-align: left;
  }
  .nf-mark {
    min-height: 120px;
  }
  .nf-mark-ring {
    inset: 6% 18%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .nf-mark-num,
  .nf-copy,
  .nf-suggest,
  .nf-mark-ring {
    animation: none;
  }
}
.empty {
  padding: 30px;
  text-align: center;
  color: var(--muted);
}

/* ---------- 页脚 ---------- */
.foot {
  margin-top: clamp(40px, 6vw, 72px);
  padding: clamp(24px, 4vw, 40px) clamp(14px, 4vw, 30px) 28px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.foot-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: clamp(18px, 3vw, 40px);
}
.foot-title {
  font-weight: 700;
  margin-bottom: 6px;
}
.foot-desc,
.foot-legal {
  color: var(--muted);
  font-size: 0.84rem;
  max-width: 62ch;
}
.foot-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 16px;
}
.foot-nav p {
  font-family: var(--display);
  font-size: 1rem;
  color: var(--text-2);
  margin-bottom: 8px;
}
.foot-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.foot-nav a {
  color: var(--text-2);
  text-decoration: none;
  font-size: 0.87rem;
}
.foot-nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}
.foot-legal {
  max-width: var(--wrap);
  margin: 22px auto 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-size: 0.78rem;
}

/* ---------- 动效与可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
  /* 单列时「接着算」不要挡在按钮和结果中间 */
  .tool-layout:not(.is-split) {
    display: flex;
    flex-direction: column;
  }
  .tool-layout:not(.is-split) .tool-form-col {
    display: contents;
  }
  .tool-layout:not(.is-split) .tool-result-col {
    order: 2;
  }
  .tool-layout:not(.is-split) .related {
    order: 3;
  }
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-card {
    order: -1;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 15px;
  }
  .nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    padding-bottom: 8px;
  }
  .head-inner {
    flex-wrap: wrap;
    padding-top: 8px;
    padding-bottom: 0;
  }
  .head-actions {
    margin-left: auto;
  }
  .nav-panel {
    /* 窄屏上头栏会折行，预留更多高度，避免菜单贴底裁切又滚不动 */
    width: min(520px, calc(100vw - 24px));
    max-height: calc(100dvh - var(--head-h) - 72px);
  }
  .auth-shell,
  .foot-inner,
  .donut {
    grid-template-columns: 1fr;
  }
  .donut-center {
    grid-column: auto;
  }
  .stats-panel,
  .stats-panel[data-columns='2'],
  .stats-panel[data-columns='3'],
  .stats-panel[data-columns='4'],
  .stats-panel[data-columns='2']:has(.stat.is-hero),
  .stats-panel[data-columns='3']:has(.stat.is-hero),
  .stats-panel[data-columns='4']:has(.stat.is-hero) {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 9.5rem), 1fr));
  }
  .stat.is-hero {
    grid-column: 1 / -1;
  }
  .consent {
    flex-direction: column;
    align-items: flex-start;
  }
  .table th,
  .table td {
    padding: 7px 9px;
  }
}