/* ==========================================================================
   杏运赛场 /assets/site.css
   共享站点样式：重置、变量、中文排版、页头、页脚、通用组件
   ========================================================================== */

/* ---------- 1. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--mist);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: var(--fs-17);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { max-width: 100%; }
img { height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
table { border-collapse: collapse; }
[hidden] { display: none !important; }

:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 2. 变量 ---------- */
:root {
  /* 矿物色系 */
  --mist: #E7E9E6;
  --paper: #F7F5EF;
  --ink: #16233A;
  --ink-soft: #3A4557;
  --night: #0E1622;
  --amber: #D99A2B;
  --amber-deep: #C0831C;
  --gold: #F0C674;
  --moss: #4F6F5A;
  --teal: #2F7E77;
  --clay: #B5654A;
  --stone: #8A9490;

  --line: rgba(22, 35, 58, 0.12);
  --line-strong: rgba(22, 35, 58, 0.24);
  --line-light: rgba(231, 233, 230, 0.16);

  /* 字体 */
  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 七级字号 */
  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-17: 1.0625rem;
  --fs-21: clamp(1.125rem, 1.7vw, 1.3125rem);
  --fs-28: clamp(1.375rem, 2.3vw, 1.75rem);
  --fs-38: clamp(1.75rem, 3.4vw, 2.375rem);
  --fs-56: clamp(2.25rem, 5.2vw, 3.5rem);

  /* 结构 */
  --header-h: 72px;
  --wrap: 1220px;
  --gutter: clamp(18px, 4vw, 48px);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);

  --mark-color: var(--amber);
}

/* 栏目色映射：分寸标记随栏目换色 */
body[data-section="home"]    { --mark-color: var(--amber); }
body[data-section="story"]   { --mark-color: var(--moss); }
body[data-section="product"] { --mark-color: var(--teal); }
body[data-section="reports"] { --mark-color: var(--clay); }
body[data-section="support"] { --mark-color: var(--gold); }
body[data-section="inquiry"] { --mark-color: var(--amber); }
body[data-section="privacy"] { --mark-color: var(--stone); }
body[data-section="usage"]   { --mark-color: var(--ink); }

/* ---------- 3. 基础排版 ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-56);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: balance;
}

.editorial {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: var(--fs-21);
  line-height: 1.45;
  color: var(--ink);
}

.lede {
  font-family: var(--font-serif);
  font-size: var(--fs-17);
  line-height: 1.9;
  color: var(--ink-soft);
  max-width: 34em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--teal);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background-color: currentColor;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
  letter-spacing: 0;
}

.prose {
  max-width: 38em;
  font-family: var(--font-serif);
  font-size: var(--fs-17);
  line-height: 1.9;
  color: var(--ink-soft);
}

.prose > * + * { margin-block-start: 1.1em; }

.prose h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-21);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-block-start: 2em;
}

.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-17);
  line-height: 1.4;
  color: var(--ink);
  margin-block-start: 1.6em;
}

.prose ul,
.prose ol {
  padding-inline-start: 1.3em;
  list-style: disc;
}

.prose a {
  color: var(--teal);
  text-underline-offset: 3px;
}

/* ---------- 4. 工具类 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 84px); }
.section--tight { padding-block: clamp(24px, 3vw, 44px); }

#main-content { padding-block-start: var(--header-h); }

/* ---------- 5. 页头 ---------- */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background-color: transparent;
  border-block-end: 1px solid transparent;
  color: var(--ink);
  transition: height 160ms ease-out,
              background-color 160ms ease-out,
              border-color 160ms ease-out,
              box-shadow 160ms ease-out;
}

.site-header[data-scrolled="true"] {
  height: 56px;
  background-color: rgba(247, 245, 239, 0.94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-block-end-color: var(--line);
  box-shadow: 0 14px 28px -26px rgba(14, 22, 34, 0.7);
}

.site-header__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 30px);
}

/* 跳转链接 */
.skip-link {
  position: fixed;
  inset-block-start: 10px;
  inset-inline-start: 10px;
  z-index: 300;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 160ms ease-out;
}

.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--ink);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-21);
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

/* 分寸标记 */
.minute-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  height: 24px;
  min-width: 44px;
  max-width: 64px;
  padding: 0 8px;
  border-radius: 8px;
  background-color: var(--mark-color, var(--amber));
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.brand__mark { flex: 0 0 auto; }

body[data-section="usage"] .brand__mark { color: var(--paper); }
body[data-section="story"] .brand__mark { color: var(--paper); }
body[data-section="product"] .brand__mark { color: var(--paper); }
body[data-section="reports"] .brand__mark { color: var(--paper); }

/* 主导航 */
.primary-nav {
  display: flex;
  align-items: center;
  margin-inline: auto;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.7vw, 26px);
}

.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 2px;
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: color 140ms ease-out;
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: 3px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms var(--ease);
}

.primary-nav__link:hover::after { transform: scaleX(1); }

.primary-nav__link[aria-current="page"] {
  color: var(--ink);
  font-weight: 900;
}

.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* 工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background-color: rgba(247, 245, 239, 0.5);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 140ms ease-out,
              border-color 140ms ease-out,
              transform 140ms ease-out;
}

.icon-btn:hover {
  background-color: var(--paper);
  border-color: var(--ink);
}

.icon-btn:active { transform: scale(0.96); }

.icon-btn svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-btn[aria-expanded="true"] {
  background-color: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

/* 回访短标签 */
.visit-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 16px;
  border-radius: var(--radius-pill);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-display);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 140ms ease-out, transform 140ms ease-out;
}

.visit-chip::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--gold);
  flex: 0 0 auto;
}

.visit-chip:hover {
  background-color: var(--night);
  transform: translateY(-1px);
}

.visit-chip--mobile { display: none; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background-color: rgba(247, 245, 239, 0.5);
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle__box {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 20px;
  height: 20px;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 220ms var(--ease), opacity 140ms ease-out;
}

.nav-toggle[aria-expanded="true"] { background-color: var(--ink); color: var(--paper); border-color: var(--ink); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child { transform: translateY(4px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child { transform: translateY(-4px) rotate(-45deg); }

/* 检索条 */
.search-panel {
  position: fixed;
  inset-block-start: 72px;
  inset-inline: 0;
  z-index: 90;
  padding: 22px var(--gutter) 28px;
  background-color: var(--paper);
  border-block-end: 1px solid var(--line);
  box-shadow: 0 40px 48px -44px rgba(14, 22, 34, 0.8);
  animation: panel-drop 180ms var(--ease);
}

@keyframes panel-drop {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.search-panel__inner {
  max-width: var(--wrap);
  margin-inline: auto;
  display: grid;
  gap: 16px;
}

.search-panel__input {
  width: 100%;
  min-height: 54px;
  padding: 0 24px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  background-color: var(--mist);
  font-family: var(--font-display);
  font-size: var(--fs-17);
  color: var(--ink);
}

.search-panel__input::placeholder { color: var(--stone); }

.search-panel__input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-color: var(--ink);
}

.search-panel__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.search-panel__link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background-color: var(--mist);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 140ms ease-out, border-color 140ms ease-out;
}

.search-panel__link:hover {
  background-color: var(--paper);
  border-color: var(--amber);
}

.search-panel__route {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 400;
  color: var(--teal);
}

.search-panel__empty {
  font-family: var(--font-display);
  font-size: var(--fs-14);
  color: var(--clay);
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-block-start: clamp(56px, 9vw, 130px);
  background-color: var(--night);
  color: var(--mist);
  font-family: var(--font-display);
}

.visit-rail {
  background-color: var(--ink);
  border-block-end: 1px solid var(--line-light);
}

.visit-rail__inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding-block: 10px;
}

.visit-rail__label {
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--stone);
  white-space: nowrap;
}

.visit-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.visit-rail__link {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 14px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: var(--fs-12);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 140ms ease-out,
              border-color 140ms ease-out,
              color 140ms ease-out;
}

.visit-rail__link:hover {
  background-color: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.footer-body {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: clamp(22px, 4vw, 54px);
  padding-block: clamp(32px, 5vw, 58px);
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin-block-end: 14px;
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--stone);
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-28);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.footer-note {
  margin-block-start: 10px;
  max-width: 26ch;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--stone);
}

.footer-links {
  display: grid;
  gap: 2px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: var(--fs-14);
  color: var(--mist);
  text-decoration: none;
  border-block-end: 1px solid transparent;
  transition: color 140ms ease-out, border-color 140ms ease-out;
}

.footer-links a:hover {
  color: var(--gold);
  border-block-end-color: var(--gold);
}

.footer-contact {
  display: grid;
  gap: 10px;
}

.footer-contact__row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  min-width: 0;
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.footer-contact__text {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--stone);
}

.copy-btn {
  min-height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--stone);
  font-family: var(--font-display);
  font-size: var(--fs-12);
  cursor: pointer;
  transition: background-color 140ms ease-out,
              color 140ms ease-out,
              border-color 140ms ease-out;
}

.copy-btn:hover {
  background-color: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.copy-btn[data-copied="true"] {
  background-color: var(--moss);
  border-color: var(--moss);
  color: var(--paper);
}

.footer-base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding-block: 18px;
  border-block-start: 1px solid var(--line-light);
  font-size: var(--fs-12);
  color: var(--stone);
}

.footer-base__note {
  max-width: 62ch;
  line-height: 1.75;
}

.footer-legal {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--mist);
  white-space: nowrap;
}

/* ---------- 7. 通用组件 ---------- */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 160ms ease-out,
              color 160ms ease-out,
              border-color 160ms ease-out,
              transform 160ms ease-out;
}

.btn--primary {
  background-color: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.btn--primary:hover { background-color: var(--night); transform: translateY(-2px); }

.btn--amber {
  background-color: var(--amber);
  border-color: var(--amber);
  color: var(--ink);
}

.btn--amber:hover { background-color: var(--amber-deep); transform: translateY(-2px); }

.btn--ghost {
  background-color: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn--ghost:hover { background-color: var(--paper); border-color: var(--ink); }

.btn--quiet {
  min-height: 44px;
  padding: 0 10px;
  background-color: transparent;
  border-color: transparent;
  color: var(--teal);
}

.btn--quiet:hover { color: var(--ink); }

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background-color: var(--mist);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.tag--amber { background-color: var(--gold); color: var(--ink); }
.tag--moss  { background-color: var(--moss); color: var(--paper); }
.tag--teal  { background-color: var(--teal); color: var(--paper); }
.tag--clay  { background-color: var(--clay); color: var(--paper); }
.tag--ghost {
  background-color: transparent;
  border-color: var(--line-strong);
  color: var(--ink-soft);
}

/* 资料卡 */
.card {
  position: relative;
  display: block;
  padding: clamp(18px, 2.4vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background-color: var(--paper);
  transition: transform 200ms var(--ease),
              border-color 200ms ease-out,
              box-shadow 200ms ease-out;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: 0 22px 44px -34px rgba(14, 22, 34, 0.75);
}

.card--flat {
  padding: 0;
  border-color: transparent;
  background-color: transparent;
}

.card--flat:hover {
  transform: none;
  border-color: transparent;
  box-shadow: none;
}

.card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-block-end: 14px;
}

.card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-21);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--stone);
}

.card__body {
  font-family: var(--font-serif);
  font-size: var(--fs-17);
  line-height: 1.9;
  color: var(--ink-soft);
}

.card__foot {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-block-start: 18px;
}

/* 图片容器 */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background-color: var(--mist);
  background-image: linear-gradient(140deg, rgba(217, 154, 43, 0.16), rgba(47, 126, 119, 0.08) 55%, transparent 85%);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(22, 35, 58, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 35, 58, 0.07) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.55;
}

.media-frame:has(img)::after { display: none; }

.media-frame > img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--soft { border-radius: var(--radius-md); }

.media-frame__caption {
  position: absolute;
  inset-block-end: 0;
  inset-inline: 0;
  z-index: 2;
  padding: 10px 16px;
  background-color: rgba(14, 22, 34, 0.82);
  color: var(--mist);
  font-family: var(--font-display);
  font-size: var(--fs-12);
  line-height: 1.5;
}

/* 面包屑 */
.breadcrumb {
  font-family: var(--font-display);
  font-size: var(--fs-12);
}

.breadcrumb__list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb__link {
  color: var(--teal);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.breadcrumb__sep { color: var(--stone); }
.breadcrumb__current { color: var(--ink-soft); }

/* 栅格 */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.split {
  display: grid;
  gap: clamp(20px, 4vw, 56px);
  align-items: start;
}

.split--5-7 { grid-template-columns: 5fr 7fr; }
.split--4-6 { grid-template-columns: 4fr 6fr; }
.split--6-6 { grid-template-columns: 6fr 6fr; }

/* 分段切换 */
.segmented {
  position: relative;
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background-color: var(--mist);
}

.segmented__indicator {
  position: absolute;
  inset-block: 4px;
  inset-inline-start: 4px;
  width: 0;
  z-index: 0;
  border-radius: var(--radius-pill);
  background-color: var(--paper);
  box-shadow: 0 10px 20px -18px rgba(14, 22, 34, 0.9);
  opacity: 0;
  pointer-events: none;
  transition: transform 220ms var(--ease), width 220ms var(--ease), opacity 160ms ease-out;
}

.segmented__indicator[data-ready="true"] { opacity: 1; }

.segmented__btn {
  position: relative;
  z-index: 1;
  min-height: 44px;
  padding: 0 20px;
  border: 0;
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--ink-soft);
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 160ms ease-out, color 160ms ease-out;
}

.segmented__btn[aria-selected="true"] {
  background-color: var(--paper);
  color: var(--ink);
}

.segmented[data-enhanced="true"] .segmented__btn[aria-selected="true"] {
  background-color: transparent;
}

/* 数据表 */
.table-scroll {
  position: relative;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background-color: var(--paper);
  -webkit-overflow-scrolling: touch;
}

.data-table {
  width: 100%;
  min-width: 640px;
  font-family: var(--font-display);
  font-size: var(--fs-14);
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  text-align: start;
  vertical-align: middle;
  border-block-end: 1px solid var(--line);
}

.data-table thead th {
  position: sticky;
  inset-block-start: 0;
  z-index: 1;
  background-color: var(--mist);
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
  white-space: nowrap;
}

.data-table tbody tr:hover { background-color: rgba(240, 198, 116, 0.16); }
.data-table tbody tr:last-child td { border-block-end: 0; }
.data-table .num { white-space: nowrap; }

/* 空状态 */
.empty-state {
  padding: clamp(24px, 4vw, 44px);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-lg);
  background-color: rgba(247, 245, 239, 0.7);
  text-align: center;
  font-family: var(--font-display);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--ink-soft);
}

.empty-state__title {
  margin-block-end: 6px;
  font-size: var(--fs-17);
  font-weight: 700;
  color: var(--ink);
}

/* 显现 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 480ms var(--ease), transform 480ms var(--ease);
}

.reveal[data-revealed="true"] {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 8. 响应式 ---------- */
@media (max-width: 1024px) {
  .split--5-7,
  .split--4-6,
  .split--6-6 { grid-template-columns: minmax(0, 1fr); }

  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .footer-body { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .header-tools .visit-chip { display: none; }

  .brand,
  .header-tools {
    position: relative;
    z-index: 2;
  }

  .primary-nav {
    position: fixed;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-inline: 0;
    padding: calc(var(--header-h) + 14px) var(--gutter) 30px;
    background-color: var(--paper);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 200ms var(--ease),
                transform 200ms var(--ease),
                visibility 200ms linear;
  }

  .site-header[data-open="true"] .primary-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-header[data-open="true"] {
    background-color: var(--paper);
    border-block-end-color: var(--line);
  }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .primary-nav__list > li { border-block-end: 1px solid var(--line); }

  .primary-nav__link {
    display: flex;
    align-items: center;
    min-height: 60px;
    padding-inline: 2px;
    font-size: var(--fs-21);
    font-weight: 700;
  }

  .primary-nav__link::after { display: none; }

  .primary-nav__link[aria-current="page"] { color: var(--moss); }

  .visit-chip--mobile {
    display: inline-flex;
    align-self: flex-start;
    margin-block-start: auto;
    margin-top: 24px;
  }

  .search-panel { inset-block-start: 72px; padding-block: 18px 24px; }
}

@media (max-width: 720px) {
  .data-table th:first-child,
  .data-table td:first-child {
    position: sticky;
    inset-inline-start: 0;
    z-index: 2;
    background-color: var(--paper);
    box-shadow: 1px 0 0 var(--line);
  }

  .data-table thead th:first-child {
    z-index: 3;
    background-color: var(--mist);
  }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer-body { grid-template-columns: minmax(0, 1fr); gap: 28px; }

  .footer-base { flex-direction: column; align-items: flex-start; }

  .brand__name { font-size: var(--fs-17); }

  .visit-rail__inner { gap: 8px 12px; }

  .search-panel { inset-block-start: 72px; }

  .search-panel__list { flex-direction: column; align-items: stretch; }

  .search-panel__link { justify-content: space-between; }
}

/* ---------- 9. 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0ms !important;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }

  .card:hover,
  .btn:hover,
  .visit-chip:hover { transform: none !important; }
}