/* ============================================================
   开心看台 · /assets/site.css
   共享外壳样式：reset、变量、中文排版、页头、页脚、通用组件
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, figure, blockquote, dl, dd, table, caption {
  margin: 0;
}

ul, ol { padding: 0; list-style: none; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; }

[hidden] { display: none !important; }

/* ---------- tokens ---------- */
:root {
  --ink-green: #12352C;
  --slate: #3E5250;
  --mist: #D7DED9;
  --cream: #F4EFE4;
  --turf: #4FBF6A;
  --turf-ink: #2C7A46;
  --amber: #F07B2A;
  --amber-ink: #8A3E05;
  --brick: #B23A2F;
  --brown: #241C17;
  --line-blue: #8A9A97;
  --fog: #FBFAF6;

  --grid-line: rgba(138, 154, 151, 0.28);
  --grid-faint: rgba(138, 154, 151, 0.14);
  --hair: 1px;
  --frame: 2px solid var(--ink-green);
  --shadow-hard: 6px 6px 0 var(--ink-green);
  --shadow-hard-sm: 4px 4px 0 var(--ink-green);

  --sans: "Noto Sans SC", "Source Han Sans SC", "Source Han Sans CN", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --gutter: 24px;
  --pad-x: 96px;
  --shell: 1560px;
  --rail: 180px;
}

@media (max-width: 1180px) { :root { --pad-x: 48px; --gutter: 20px; } }
@media (max-width: 760px)  { :root { --pad-x: 20px; --gutter: 16px; } }

/* ---------- base ---------- */
body {
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  color: var(--brown);
  background-color: var(--cream);
  background-image:
    linear-gradient(var(--grid-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-faint) 1px, transparent 1px),
    repeating-linear-gradient(45deg, rgba(36, 28, 23, 0.012) 0 1px, transparent 1px 3px);
  background-size: 64px 64px, 64px 64px, auto;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body,
button,
input,
select,
textarea { font-family: var(--sans); }

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--brown);
}

h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 900; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.45rem); }

::selection { background: var(--amber); color: var(--brown); }

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

#main-content { scroll-margin-top: 24px; }

/* ---------- 通用工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.prose {
  max-width: 68ch;
  line-height: 1.75;
  color: var(--brown);
}

.prose p + p { margin-top: 1em; }

.prose ul,
.prose ol {
  margin: 1em 0;
  padding-left: 1.4em;
  list-style: disc;
}

.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

.index-label,
.unit-label {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
  font-variant-numeric: tabular-nums;
}

.rule-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-block: 32px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

.rule-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--grid-line);
}

/* ---------- 12列网格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.grid-12 > * { grid-column: span 12; min-width: 0; }

@media (min-width: 900px) {
  .col-3  { grid-column: span 3; }
  .col-4  { grid-column: span 4; }
  .col-5  { grid-column: span 5; }
  .col-6  { grid-column: span 6; }
  .col-7  { grid-column: span 7; }
  .col-8  { grid-column: span 8; }
  .col-9  { grid-column: span 9; }
  .col-12 { grid-column: span 12; }
}

/* ---------- 分区骨架 ---------- */
.section {
  position: relative;
  padding-block: clamp(40px, 6vw, 84px);
}

.section__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 36px);
  padding-bottom: 14px;
  border-bottom: var(--hair) solid var(--grid-line);
}

.section__index {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber-ink);
  font-variant-numeric: tabular-nums;
}

.section__title { max-width: 24ch; }

.section__note {
  max-width: 62ch;
  font-size: 0.94rem;
  color: var(--slate);
}

/* ---------- 斜切 ---------- */
.slice {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 48px), 0 100%);
}

.slice--rev {
  clip-path: polygon(0 48px, 100% 0, 100% 100%, 0 100%);
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  top: -60px;
  left: 12px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--ink-green);
  color: var(--cream);
  border: 2px solid var(--amber);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  transition: top 0.2s var(--ease);
}

.skip-link:focus { top: 10px; }

/* ---------- 页头：坐标尺 ---------- */
.site-header {
  position: relative;
  z-index: 40;
  background: var(--cream);
}

.geo-ruler {
  display: flex;
  align-items: center;
  gap: 16px;
  height: 22px;
  padding-inline: var(--pad-x);
  background: var(--ink-green);
  color: var(--mist);
}

.geo-ruler__ticks {
  flex: 1;
  height: 9px;
  min-width: 40px;
  border-bottom: 1px solid rgba(215, 222, 217, 0.55);
  background-image:
    repeating-linear-gradient(90deg, rgba(215, 222, 217, 0.75) 0 1px, transparent 1px 60px),
    repeating-linear-gradient(90deg, rgba(215, 222, 217, 0.4) 0 1px, transparent 1px 12px);
  background-repeat: repeat-x;
  background-position: left bottom;
}

.geo-ruler__label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

/* 滚动进度尺 */
.scroll-progress {
  position: fixed;
  inset-inline: 0;
  top: 0;
  height: 3px;
  z-index: 90;
  background: rgba(18, 53, 44, 0.14);
}

.scroll-progress__fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--amber);
}

/* ---------- 页头：品牌带 ---------- */
.header-band {
  background: var(--cream);
  border-bottom: var(--hair) solid var(--grid-line);
}

.header-band__inner {
  display: grid;
  gap: 18px;
  align-items: end;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 18px var(--pad-x) 16px;
}

@media (min-width: 1000px) {
  .header-band__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 32px;
  }
}

.brand-block {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  width: fit-content;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  background: var(--ink-green);
  color: var(--cream);
  border: 2px solid var(--brown);
  box-shadow: 4px 4px 0 var(--amber);
  font-size: 1.35rem;
  font-weight: 900;
  line-height: 1;
}

.brand__text { display: grid; gap: 2px; }

.brand__name {
  font-size: clamp(1.5rem, 2.6vw, 2.05rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--brown);
}

.brand__line {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.brand__descriptor {
  max-width: 52ch;
  font-size: 0.9rem;
  color: var(--slate);
  padding-left: 60px;
}

@media (max-width: 640px) {
  .brand__descriptor { padding-left: 0; }
}

/* ---------- 页头：工具条 ---------- */
.utility-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.league-switcher {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: var(--fog);
  border: 2px solid var(--ink-green);
}

.league-switcher__button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--ink-green);
  font-variant-numeric: tabular-nums;
}

.league-switcher__caret {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 6px solid var(--amber);
  transition: transform 0.2s var(--ease);
}

.league-switcher[data-open] .league-switcher__caret { transform: rotate(180deg); }

.league-switcher__menu {
  position: absolute;
  top: calc(100% + 6px);
  left: -2px;
  min-width: 172px;
  z-index: 60;
  background: var(--fog);
  border: 2px solid var(--ink-green);
  box-shadow: var(--shadow-hard);
  padding: 4px;
}

.league-switcher__menu button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-green);
  text-align: left;
}

.league-switcher__menu button:hover { background: var(--mist); }

.league-switcher__menu button[aria-pressed="true"] {
  background: var(--ink-green);
  color: var(--cream);
}

.league-switcher__menu button[aria-pressed="true"]::after {
  content: "◆";
  color: var(--amber);
  font-size: 9px;
}

.compare-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 2px solid var(--slate);
  background: var(--fog);
  color: var(--ink-green);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.compare-toggle__dot {
  width: 10px;
  height: 10px;
  border: 2px solid var(--slate);
  background: transparent;
}

.compare-toggle[aria-pressed="true"] {
  background: var(--turf);
  border-color: var(--ink-green);
  color: var(--brown);
}

.compare-toggle[aria-pressed="true"] .compare-toggle__dot {
  background: var(--brown);
  border-color: var(--brown);
}

.season-tag {
  padding: 8px 12px;
  background: var(--mist);
  border: 1px dashed var(--line-blue);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
  font-variant-numeric: tabular-nums;
}

/* ---------- 页头：框架式导航 ---------- */
.site-nav {
  display: flex;
  align-items: stretch;
  padding-inline: var(--pad-x);
  background: var(--fog);
  border-bottom: var(--frame);
  border-top: var(--hair) solid var(--grid-line);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  margin: 0;
  padding: 0;
}

.site-nav__item { display: flex; }

.site-nav__item a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 15px 22px;
  border-left: var(--hair) solid var(--grid-line);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-green);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.site-nav__item:last-child a { border-right: var(--hair) solid var(--grid-line); }

.site-nav__index {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--line-blue);
  font-variant-numeric: tabular-nums;
}

.site-nav__item a:hover { background: var(--mist); }

.site-nav__item a:focus-visible { outline-offset: -4px; }

.site-nav__item a[aria-current="page"] {
  background: var(--ink-green);
  color: var(--cream);
}

.site-nav__item a[aria-current="page"] .site-nav__index { color: var(--amber); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 14px 4px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-green);
}

.nav-toggle__bar {
  width: 20px;
  height: 10px;
  border-top: 2px solid var(--ink-green);
  border-bottom: 2px solid var(--ink-green);
  transition: transform 0.2s var(--ease);
}

.site-nav[data-open] .nav-toggle__bar { transform: scaleY(0.6); }

@media (max-width: 900px) {
  .site-nav {
    flex-direction: column;
    padding-inline: var(--pad-x);
  }

  .nav-toggle { display: inline-flex; }

  .site-nav__list {
    display: none;
    flex-direction: column;
    width: 100%;
    border-top: var(--hair) solid var(--grid-line);
  }

  .site-nav[data-open] .site-nav__list { display: flex; }

  .site-nav__item { width: 100%; }

  .site-nav__item a {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 2px;
    border-left: 0;
    border-bottom: var(--hair) solid var(--grid-line);
  }

  .site-nav__item:last-child a { border-right: 0; }
}

/* ---------- 面板 / 卡片 ---------- */
.panel {
  position: relative;
  padding: 22px;
  background: var(--fog);
  border: var(--frame);
  box-shadow: var(--shadow-hard);
}

.panel--flat { box-shadow: none; }

.panel--slate {
  background: var(--slate);
  border-color: var(--ink-green);
  color: var(--mist);
}

.panel--slate h2,
.panel--slate h3 { color: var(--fog); }

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: var(--hair) solid var(--grid-line);
}

.panel__body { display: grid; gap: 12px; }

.card-hover {
  transition: box-shadow 0.2s var(--ease), border-color 0.2s var(--ease);
}

.card-hover:hover {
  border-color: var(--slate);
  box-shadow: 9px 9px 0 var(--ink-green);
}

/* ---------- 指标 ---------- */
.metric {
  display: grid;
  gap: 4px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.metric__value {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.05;
  color: var(--ink-green);
}

.metric--accent .metric__value { color: var(--amber-ink); }

.metric__label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

.delta {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.delta--up { color: var(--turf-ink); }
.delta--down { color: var(--brick); }

/* ---------- 表格 ---------- */
.data-table {
  width: 100%;
  font-size: 0.94rem;
  font-variant-numeric: tabular-nums;
  table-layout: fixed;
}

.data-table caption {
  padding-bottom: 8px;
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  border: var(--hair) solid var(--grid-line);
  text-align: left;
  vertical-align: top;
}

.data-table thead th {
  background: var(--ink-green);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  border-color: var(--ink-green);
}

.data-table tbody tr:nth-child(even) { background: var(--mist); }

.data-table td.num,
.data-table th.num {
  font-family: var(--mono);
  text-align: right;
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line-blue);
  background: var(--fog);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.tag--live { border-color: var(--amber); color: var(--amber-ink); background: #FCEBDC; }
.tag--up { border-color: var(--turf-ink); color: var(--turf-ink); background: #E4F5E9; }
.tag--down { border-color: var(--brick); color: var(--brick); background: #F7E4E1; }
.tag--solid { background: var(--ink-green); border-color: var(--ink-green); color: var(--cream); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 2px solid var(--ink-green);
  background: var(--fog);
  color: var(--ink-green);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: var(--shadow-hard-sm);
  transition: background-color 0.2s var(--ease), box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn:hover { background: var(--mist); }

.btn:active {
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 var(--ink-green);
}

.btn--solid {
  background: var(--ink-green);
  color: var(--cream);
  box-shadow: 4px 4px 0 var(--amber);
}

.btn--solid:hover { background: var(--slate); }

.btn--solid:active { box-shadow: 0 0 0 var(--amber); }

.btn--accent {
  background: var(--amber);
  border-color: var(--brown);
  color: var(--brown);
  box-shadow: 4px 4px 0 var(--brown);
}

.btn--accent:hover { background: #F79049; }

.btn--accent:active { box-shadow: 0 0 0 var(--brown); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--slate);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--line-blue);
}

.breadcrumb a:hover {
  color: var(--ink-green);
  text-decoration: underline;
}

/* ---------- 时间轴 / 侧栏 ---------- */
.rail {
  position: sticky;
  top: 24px;
  align-self: start;
}

.timeline {
  position: relative;
  padding-left: 22px;
  border-left: 2px solid var(--ink-green);
}

.timeline__item {
  position: relative;
  padding-bottom: 22px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--fog);
  border: 2px solid var(--ink-green);
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.timeline__item:hover::before {
  transform: scale(1.15);
  background: var(--mist);
}

.timeline__item[aria-current="true"]::before {
  transform: scale(1.15);
  background: var(--amber);
  border-color: var(--brown);
}

.timeline__round {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--ink-green);
  font-variant-numeric: tabular-nums;
}

.timeline__meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

/* ---------- 对比并置 ---------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gutter);
}

.compare__col { display: grid; gap: 12px; align-content: start; }

.compare__rule {
  display: none;
  width: 1px;
  align-self: stretch;
  background-image: repeating-linear-gradient(180deg, var(--line-blue) 0 8px, transparent 8px 16px);
}

@media (min-width: 900px) {
  .compare { grid-template-columns: 1fr 1px 1fr; }
  .compare__rule { display: block; }
}

/* ---------- 可展开索引组 ---------- */
.accordion { display: grid; gap: 14px; }

.accordion__item {
  background: var(--fog);
  border: var(--frame);
  box-shadow: var(--shadow-hard);
}

.accordion__trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--brown);
}

.accordion__trigger:hover { background: var(--mist); }

.accordion__index {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--amber-ink);
  font-variant-numeric: tabular-nums;
}

.accordion__sign {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1;
  color: var(--slate);
  transition: transform 0.2s var(--ease);
}

.accordion__item[data-open] .accordion__sign { transform: rotate(45deg); }

.accordion__panel {
  padding: 0 18px 18px;
  font-size: 0.94rem;
  color: var(--brown);
}

.accordion__item:not([data-open]) .accordion__panel { display: none; }

/* ---------- 空状态 ---------- */
.empty-state {
  padding: 28px 22px;
  border: 2px dashed var(--line-blue);
  background: var(--fog);
  color: var(--slate);
  font-size: 0.94rem;
}

/* ---------- 图片容器（页面阶段放图） ---------- */
.image-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: var(--frame);
  background-color: var(--mist);
  background-image: repeating-linear-gradient(135deg, rgba(18, 53, 44, 0.1) 0 2px, transparent 2px 10px);
  box-shadow: var(--shadow-hard);
}

.image-frame--tall { aspect-ratio: 3 / 4; }
.image-frame--wide { aspect-ratio: 21 / 9; }

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.08);
}

.image-frame__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 11px;
  background: var(--ink-green);
  color: var(--cream);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

/* ---------- 显影 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--ink-green);
  color: var(--mist);
}

.footer-band {
  height: 10px;
  background-image: repeating-linear-gradient(90deg,
    var(--turf) 0 24px,
    var(--amber) 24px 48px,
    var(--line-blue) 48px 72px);
}

.footer-grid {
  display: grid;
  gap: 28px;
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 56px) var(--pad-x);
}

@media (min-width: 900px) {
  .footer-grid { grid-template-columns: 1.5fr repeat(4, minmax(0, 1fr)); gap: 32px; }
}

.footer-brand {
  display: grid;
  gap: 10px;
  align-content: start;
}

.footer-brand__mark {
  display: inline-grid;
  place-items: center;
  width: fit-content;
  padding: 6px 12px;
  border: 2px solid var(--turf);
  color: var(--turf);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.footer-brand__name {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.footer-brand__line {
  max-width: 30ch;
  font-size: 0.9rem;
  color: var(--mist);
}

.footer-brand__cta {
  display: inline-flex;
  width: fit-content;
  margin-top: 6px;
  padding: 10px 16px;
  border: 2px solid var(--turf);
  color: var(--fog);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.footer-brand__cta:hover {
  background: var(--turf);
  color: var(--ink-green);
}

.footer-col { display: grid; gap: 12px; align-content: start; }

.footer-col__title {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(215, 222, 217, 0.28);
}

.footer-col__list { display: grid; gap: 8px; }

.footer-col__list a {
  font-size: 0.9rem;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer-col__list a:hover {
  color: var(--fog);
  border-bottom-color: var(--turf);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 16px var(--pad-x) 26px;
  border-top: 1px solid rgba(215, 222, 217, 0.24);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(215, 222, 217, 0.82);
  font-variant-numeric: tabular-nums;
}

/* ---------- 键盘与降级 ---------- */
.site-footer a:focus-visible,
.footer-brand__cta:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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