/* ==========================================================================
   足博体育站 · 共享样式表 /assets/site.css
   结构：reset → 变量 → 中文排版 → 无障碍 → 布局 → 按钮 → 组件 → 头部 → 页脚
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

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

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

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

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

button { background: none; border: 0; cursor: pointer; }

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

table { border-collapse: collapse; width: 100%; }

/* ---------- 变量 ---------- */
:root {
  /* 品牌色 */
  --ink: #0B1A16;
  --turf-deep: #14432F;
  --turf: #1E7A4C;
  --turf-light: #7FD0A3;
  --score: #E8452C;
  --amber: #F2A61B;
  --cup: #46708C;
  --cup-deep: #24455C;
  --review: #3F3A6E;
  --mist: #EDF2EE;
  --paper: #FFFFFF;

  /* 线条 */
  --line: rgba(11, 26, 22, 0.16);
  --line-strong: rgba(11, 26, 22, 0.55);
  --line-light: rgba(237, 242, 238, 0.24);

  /* 结构 */
  --rail-w: 92px;
  --shell-max: 1180px;
  --gutter: clamp(20px, 3.5vw, 56px);

  /* 硬阴影（粗野主义） */
  --shadow-hard: 5px 5px 0 var(--ink);
  --shadow-score: 6px 6px 0 var(--score);
  --shadow-soft: 4px 4px 0 rgba(11, 26, 22, 0.12);

  /* 字体 */
  --font-sans: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB",
    "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular",
    Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ---------- 中文排版基底 ---------- */
body {
  background: var(--mist);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  padding-left: var(--rail-w);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-sans);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-stretch: condensed;
}

h1 { font-size: clamp(34px, 6vw, 72px); }
h2 { font-size: clamp(26px, 4vw, 44px); }
h3 { font-size: clamp(19px, 2.4vw, 28px); font-weight: 400; }
h4 { font-size: 20px; font-weight: 500; letter-spacing: 0; }

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

/* ---------- 无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--score);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 300;
  padding: 12px 20px;
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--amber);
  font-size: 14px;
  font-weight: 600;
  transform: translateY(-180%);
  transition: transform 140ms var(--ease);
}

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

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

/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(48px, 7vw, 96px);
}

.section--tight { padding-block: clamp(28px, 4vw, 52px); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.section-head__title { font-weight: 250; }

.section-head__text {
  max-width: 34em;
  color: rgba(11, 26, 22, 0.74);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--turf);
}

.eyebrow::before {
  content: "";
  flex: 0 0 28px;
  height: 2px;
  background: currentColor;
}

.eyebrow--cup { color: var(--cup); }
.eyebrow--amber { color: #9A6608; }
.eyebrow--review { color: var(--review); }
.eyebrow--light { color: var(--turf-light); }

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.lede {
  max-width: 34em;
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.6;
  color: rgba(11, 26, 22, 0.8);
}

.prose {
  max-width: 36em;
  color: var(--ink);
}

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

.prose h3 { margin-top: 1.8em; }

.prose a {
  color: var(--turf);
  border-bottom: 2px solid var(--turf-light);
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.prose a:hover {
  color: var(--score);
  border-bottom-color: var(--score);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(11, 26, 22, 0.62);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}

.breadcrumb a {
  border-bottom: 2px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.breadcrumb a:hover {
  color: var(--ink);
  border-bottom-color: var(--score);
}

.band {
  height: 12px;
  background: var(--turf);
  border-block: 2px solid var(--ink);
}

.band--turf { background: var(--turf); }
.band--cup { background: var(--cup); }
.band--amber { background: var(--amber); }
.band--review { background: var(--review); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 2px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 140ms var(--ease), color 140ms var(--ease),
    border-color 140ms var(--ease), box-shadow 140ms var(--ease),
    transform 140ms var(--ease);
}

.btn:hover {
  border-color: var(--score);
  box-shadow: 4px 4px 0 var(--score);
  transform: translate(-2px, -2px);
}

.btn:active { background: var(--turf-light); }

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

.btn--score:hover {
  background: #C9351F;
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.btn--ghost {
  background: transparent;
  border-color: currentColor;
  color: inherit;
}

.btn--ghost:hover {
  border-color: var(--score);
  color: var(--score);
  box-shadow: 4px 4px 0 rgba(232, 69, 44, 0.24);
}

.btn[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.45;
  filter: grayscale(1);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
  padding: clamp(18px, 2vw, 26px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 140ms var(--ease), box-shadow 140ms var(--ease),
    transform 140ms var(--ease);
}

.card:hover,
.card:focus-within {
  border-color: var(--score);
  box-shadow: var(--shadow-score);
  transform: translate(-2px, -2px);
}

.card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(11, 26, 22, 0.6);
}

.card__title {
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.card__text {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(11, 26, 22, 0.76);
}

.card--cup { border-color: var(--cup-deep); box-shadow: 5px 5px 0 var(--cup-deep); }
.card--cup:hover { border-color: var(--cup); box-shadow: 6px 6px 0 var(--cup); }
.card--amber { border-color: var(--ink); box-shadow: 5px 5px 0 var(--amber); }
.card--review { border-color: var(--review); box-shadow: 5px 5px 0 var(--review); }

/* ---------- 标签 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 2px solid currentColor;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.badge--turf { color: var(--turf); }
.badge--cup { color: var(--cup-deep); }
.badge--amber { background: var(--amber); border-color: var(--amber); color: var(--ink); }
.badge--review { background: var(--review); border-color: var(--review); color: var(--mist); }

/* ---------- 数字 ---------- */
.num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--score);
  letter-spacing: -0.02em;
  line-height: 1;
}

.num--big { font-size: clamp(44px, 8vw, 96px); }
.num--mid { font-size: clamp(24px, 3.4vw, 40px); }
.num--muted { color: var(--ink); }

/* ---------- 表格 ---------- */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 2px solid var(--ink);
  background: var(--paper);
}

.table {
  min-width: 560px;
  font-size: 15px;
}

.table th,
.table td {
  padding: 10px 14px;
  text-align: left;
  vertical-align: middle;
  border-bottom: 1px solid var(--line);
}

.table thead th {
  background: var(--turf-deep);
  color: var(--mist);
  border-bottom: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

.table tbody tr {
  transition: background 90ms var(--ease);
}

.table tbody tr:hover {
  background: rgba(127, 208, 163, 0.24);
}

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

.table--cup thead th { background: var(--cup-deep); }

/* ---------- 图片容器（供页面阶段放置占位或真实图片） ---------- */
.media {
  border: 2px solid var(--ink);
  background: var(--paper);
  overflow: hidden;
}

.media__frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 10;
  background-color: var(--turf-deep);
  background-image: repeating-linear-gradient(
    105deg,
    rgba(127, 208, 163, 0.14) 0 24px,
    rgba(20, 67, 47, 0.16) 24px 48px
  );
  color: rgba(237, 242, 238, 0.55);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.media__frame--square { aspect-ratio: 1 / 1; }
.media__frame--wide { aspect-ratio: 21 / 9; }

.media__frame--cup {
  background-color: var(--cup-deep);
  background-image: repeating-linear-gradient(
    105deg,
    rgba(70, 112, 140, 0.3) 0 24px,
    rgba(36, 69, 92, 0.3) 24px 48px
  );
}

.media__frame--amber {
  background-color: #8A5A06;
  background-image: repeating-linear-gradient(
    105deg,
    rgba(242, 166, 27, 0.24) 0 24px,
    rgba(138, 90, 6, 0.28) 24px 48px
  );
}

.media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--ink);
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(11, 26, 22, 0.66);
}

.media--cup { border-color: var(--cup-deep); }
.media--cup .media__cap { border-top-color: var(--cup-deep); }

/* ---------- 渐显（site.js 驱动） ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
}

.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease);
}

/* ==========================================================================
   头部：左侧品牌轨道 + 透明叠加导航
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: var(--rail-w) minmax(0, 1fr);
  height: 100vh;
  height: 100dvh;
  pointer-events: none;
}

.site-header > * { pointer-events: auto; }

/* --- 左侧轨道 --- */
.rail {
  grid-column: 1;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0 24px;
  background: var(--turf-deep);
  color: var(--mist);
  border-right: 3px solid var(--ink);
  overflow: hidden;
}

.rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.rail__brand-mark {
  writing-mode: vertical-rl;
  font-size: 19px;
  font-weight: 300;
  letter-spacing: 0.3em;
  line-height: 1;
  color: var(--mist);
  transition: color 140ms var(--ease);
}

.rail__brand-sub {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--turf-light);
}

.rail__brand:hover .rail__brand-mark { color: var(--turf-light); }

.rail__ruler {
  position: relative;
  flex: 1 1 auto;
  width: 2px;
  min-height: 56px;
  margin: 4px 0;
  background: var(--line-light);
}

.rail__ruler::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -5px;
  width: 12px;
  background-image: repeating-linear-gradient(
    180deg,
    rgba(237, 242, 238, 0.4) 0 1px,
    transparent 1px 14px
  );
  pointer-events: none;
}

.rail__ruler-fill {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 0;
  background: var(--score);
  transition: height 90ms linear;
}

.rail__season {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
}

.rail__season-key {
  font-size: 9px;
  letter-spacing: 0.24em;
  color: rgba(237, 242, 238, 0.5);
}

.rail__season-year {
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--turf-light);
}

.rail__top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  width: 52px;
  padding: 9px 0;
  border: 2px solid rgba(237, 242, 238, 0.35);
  color: var(--mist);
  background: transparent;
  transition: border-color 140ms var(--ease), color 140ms var(--ease),
    background 140ms var(--ease);
}

.rail__top:hover {
  border-color: var(--score);
  color: var(--score);
  background: rgba(232, 69, 44, 0.1);
}

.rail__top-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
}

.rail__top-icon {
  width: 16px;
  height: 16px;
}

/* --- 顶部导航条 --- */
.site-header__bar {
  grid-column: 2;
  align-self: start;
  position: relative;
  background: linear-gradient(
    180deg,
    rgba(11, 26, 22, 0.88) 0%,
    rgba(11, 26, 22, 0.44) 64%,
    rgba(11, 26, 22, 0) 100%
  );
  color: var(--mist);
  border-bottom: 2px solid transparent;
  transition: background 160ms var(--ease), color 160ms var(--ease),
    border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.site-header[data-scrolled="true"] .site-header__bar {
  background: var(--paper);
  color: var(--ink);
  border-bottom-color: var(--ink);
  box-shadow: 0 5px 0 rgba(11, 26, 22, 0.1);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2vw, 36px);
  padding: 14px var(--gutter);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 0 0 auto;
}

.brand__name {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  opacity: 0.72;
  white-space: nowrap;
}

/* --- 导航 --- */
.nav { margin-left: auto; }

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 26px);
}

.nav__item { display: block; }

.nav__link {
  position: relative;
  display: inline-block;
  padding: 6px 2px;
  font-size: 15px;
  letter-spacing: 0.02em;
  color: inherit;
  transition: color 120ms var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 100%;
  background: var(--score);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 120ms var(--ease), background 120ms var(--ease);
}

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

.nav__link[aria-current="page"] {
  font-weight: 600;
}

.nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  height: 3px;
  background: var(--amber);
}

/* --- 头部动作区 --- */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.header-cta {
  padding: 10px 18px;
  font-size: 13px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 12px;
  border: 2px solid currentColor;
  color: inherit;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: border-color 120ms var(--ease), color 120ms var(--ease);
}

.nav-toggle:hover { border-color: var(--score); color: var(--score); }

.nav-toggle__icon {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__icon span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 140ms var(--ease), opacity 140ms var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--turf-deep);
  color: var(--mist);
  border-top: 3px solid var(--ink);
}

.site-footer__band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  height: 10px;
  border-bottom: 3px solid var(--ink);
}

.site-footer__band span:nth-child(1) { background: var(--turf); }
.site-footer__band span:nth-child(2) { background: var(--cup); }
.site-footer__band span:nth-child(3) { background: var(--amber); }

.site-footer__inner {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) var(--gutter);
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 2fr) minmax(0, 1.1fr);
}

.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-brand__name {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.footer-brand__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--turf-light);
}

.footer-brand__tagline {
  max-width: 26em;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(237, 242, 238, 0.76);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.footer-nav__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--turf-light);
}

.footer-nav__list li + li { margin-top: 10px; }

.footer-nav__link {
  display: inline-block;
  padding-bottom: 2px;
  font-size: 15px;
  color: var(--mist);
  border-bottom: 2px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.footer-nav__link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-contact__line {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(237, 242, 238, 0.92);
  word-break: break-word;
}

.footer-contact__note {
  margin-top: 8px;
  max-width: 22em;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(237, 242, 238, 0.62);
}

.site-footer__legal {
  border-top: 1px solid var(--line-light);
}

.site-footer__legal-inner {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 18px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(237, 242, 238, 0.7);
}

.site-footer__closing { color: var(--turf-light); }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1100px) {
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1023px) {
  :root { --rail-w: 0px; }

  .site-header {
    grid-template-columns: minmax(0, 1fr);
    height: auto;
  }

  .rail { display: none; }

  .site-header__bar { grid-column: 1; }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-left: 0;
    padding: 8px 20px 22px;
    background: var(--paper);
    color: var(--ink);
    border-top: 2px solid var(--ink);
    border-bottom: 3px solid var(--ink);
    box-shadow: 0 8px 0 rgba(11, 26, 22, 0.14);
    max-height: calc(100dvh - 88px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 140ms var(--ease), transform 140ms var(--ease),
      visibility 140ms var(--ease);
  }

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

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

  .nav__link {
    display: block;
    padding: 14px 4px;
    font-size: 19px;
    border-bottom: 2px solid var(--line);
  }

  .nav__link::after { display: none; }

  .nav__link[aria-current="page"] {
    background: rgba(127, 208, 163, 0.22);
    border-bottom-color: var(--ink);
    box-shadow: inset 4px 0 0 var(--amber);
    padding-left: 12px;
  }

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

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

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }

  .brand__tag { display: none; }

  .header-cta { display: none; }

  .site-header__inner { gap: 12px; padding: 12px var(--gutter); }

  .nav-toggle__label { display: none; }

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

  .site-footer__legal-inner { flex-direction: column; align-items: flex-start; }
}

@media (min-width: 641px) and (max-width: 900px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 动效降级 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .card:hover,
  .card:focus-within,
  .btn:hover {
    transform: none;
  }
}