/* ==========================================================================
   canada-28-forecast.com.cn — /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

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

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

body {
  margin: 0;
  background: #F4F1EA;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  overflow-x: hidden;
}

img, svg, video, canvas { max-width: 100%; }
img, svg { vertical-align: middle; }

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

button { cursor: pointer; }

[hidden] { display: none !important; }

ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; }

a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--red); }

/* ---------- 2. 变量 ---------- */
:root {
  /* 纸质与雾灰 */
  --paper: #F4F1EA;
  --paper-2: #EFEBE1;
  --mist-a: #E6E1D8;
  --mist-b: #D8D3C8;
  /* 墨色 */
  --ink: #2A1E1B;
  --ink-2: #3B2C27;
  --slate: #5A6472;
  /* 品牌色 */
  --red: #D80621;
  --red-deep: #A80419;
  --green: #00A88E;
  --green-deep: #00735F;
  --blue: #1B3B6F;
  --blue-deep: #122A50;
  --amber: #C9781F;
  --white: #FFFFFF;
  --frost: #C3CFDC;

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

  /* 结构 */
  --gutter: 24px;
  --maxw: 1280px;
  --radius: 3px;
  --shadow-1: 3px 3px 0 rgba(42, 30, 27, 0.08);
  --shadow-2: 6px 6px 0 rgba(42, 30, 27, 0.07);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 高对比模式 */
html[data-contrast="high"] {
  --ink: #120B09;
  --ink-2: #1D1310;
  --slate: #333B47;
  --frost: #8C99A8;
  --mist-a: #E2DCD2;
  --mist-b: #CFC8BB;
}

/* ---------- 3. 排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

h1 { font-size: clamp(36px, 5.6vw, 56px); line-height: 1.08; letter-spacing: -0.018em; }
h2 { font-size: clamp(26px, 3.4vw, 34px); line-height: 1.16; }
h3 { font-size: 20px; }
h4 { font-size: 16px; font-weight: 700; }

p { margin: 0 0 1em; }
p:last-child, ul:last-child, ol:last-child { margin-bottom: 0; }

strong, b { font-weight: 700; }

.t-display { font-size: clamp(38px, 6.4vw, 68px); font-weight: 900; line-height: 1.04; letter-spacing: -0.022em; margin: 0 0 0.4em; }
.t-h2 { font-size: clamp(26px, 3.4vw, 34px); font-weight: 900; line-height: 1.16; letter-spacing: -0.012em; margin: 0 0 0.5em; }
.t-h3 { font-size: 20px; font-weight: 700; line-height: 1.3; margin: 0 0 0.5em; }
.t-lead { font-size: 17px; line-height: 1.78; color: var(--slate); max-width: 38em; }
.t-num { font-family: var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }

.eyebrow {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.prose { max-width: 38em; }
.prose p { line-height: 1.7; }
.prose h2, .prose h3 { margin-top: 1.6em; }

/* ---------- 4. 布局工具 ---------- */
.container {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.container--narrow {
  width: min(760px, calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.stack-24 > * + * { margin-top: 24px; }
.stack-40 > * + * { margin-top: 40px; }

/* ---------- 5. 跳转链接与焦点 ---------- */
.skip-link {
  position: fixed;
  left: var(--gutter);
  top: -80px;
  z-index: 300;
  padding: 11px 18px;
  background: var(--ink);
  color: #FFF;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  border-radius: var(--radius);
  transition: top 0.18s var(--ease);
}
.skip-link:hover { color: #FFF; }
.skip-link:focus { top: 14px; }

:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 6. 头部骨架 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.24s var(--ease),
              border-color 0.24s var(--ease),
              box-shadow 0.24s var(--ease);
}

.site-header[data-scrolled] {
  background: rgba(244, 241, 234, 0.96);
  border-bottom-color: var(--frost);
  box-shadow: 0 12px 28px -26px rgba(42, 30, 27, 0.7);
}

.header-rule {
  display: block;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--red) 0 26%,
    var(--amber) 26% 38%,
    var(--green) 38% 56%,
    var(--blue) 56% 100%
  );
}

.header-shell {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 15px 0 13px;
  transition: padding 0.24s var(--ease);
}

.site-header[data-scrolled] .header-shell { padding: 9px 0 8px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--red-deep);
  border-radius: var(--radius);
  background: var(--red);
  box-shadow: 2px 2px 0 rgba(42, 30, 27, 0.18);
}
.brand-mark svg { width: 20px; height: 20px; fill: #FFFFFF; }

.brand-words { display: flex; flex-direction: column; line-height: 1.08; }
.brand-name { font-size: 17px; font-weight: 900; letter-spacing: -0.012em; }
.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--slate);
}

/* 期次切换器 */
.issue-switch {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-inline: auto;
  padding: 4px 7px;
  border: 1px solid var(--frost);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.7);
}

.issue-switch__cap {
  padding-inline: 5px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.issue-chip {
  padding: 5px 10px;
  border: 1px solid transparent;
  border-radius: 2px;
  background: transparent;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--slate);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.issue-chip:hover { color: var(--ink); border-color: var(--frost); }
.issue-chip.is-current {
  background: var(--red);
  border-color: var(--red-deep);
  color: #FFFFFF;
  font-weight: 700;
}

/* 工具区 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  flex: 0 0 auto;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--frost);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font-size: 12px;
  letter-spacing: 0.12em;
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.tool-btn:hover { border-color: var(--ink); }
.tool-btn[aria-pressed="true"] { background: var(--blue); border-color: var(--blue-deep); color: #FFFFFF; }

.tool-btn__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(0, 168, 142, 0.18);
}
.tool-btn[aria-pressed="true"] .tool-btn__dot {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(201, 120, 31, 0.24);
}

.burger { display: none; position: relative; width: 16px; height: 11px; }
.burger i {
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}
.burger i:nth-child(1) { top: 0; }
.burger i:nth-child(2) { top: 4.5px; }
.burger i:nth-child(3) { top: 9px; }

/* ---------- 7. 导航索引条（桌面） ---------- */
.nav-band {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  border-top: 1px solid transparent;
  transition: border-color 0.24s var(--ease);
}

.site-header[data-scrolled] .nav-band { border-top-color: var(--frost); }

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
}

.nav-list > li { flex: 1 1 0; min-width: 0; }
.nav-list > li + li { border-left: 1px solid var(--frost); }

.nav-list a {
  position: relative;
  display: block;
  padding: 11px 6px 13px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  color: var(--slate);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 5px;
  height: 2px;
  background: var(--red);
  transition: left 0.22s var(--ease), right 0.22s var(--ease);
}

.nav-list a:hover { color: var(--ink); }
.nav-list a:hover::after { left: 16%; right: 16%; }

.nav-list a[aria-current="page"] { color: var(--red); }
.nav-list a[aria-current="page"]::after { left: 16%; right: 16%; }

.nav-close { display: none; }

/* ---------- 8. 阅读进度线 ---------- */
.header-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: 0 50%;
  will-change: transform;
}

/* ---------- 9. 抽屉遮罩 ---------- */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(42, 30, 27, 0.44);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.26s var(--ease);
}
body.nav-open .nav-scrim { opacity: 1; pointer-events: auto; }

/* ---------- 10. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  padding: 58px 0 26px;
  background: var(--ink);
  color: #EDE7DC;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(100deg, var(--green) 0 34%, var(--blue) 62%, var(--red) 100%);
}

.footer-shell {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 48px 64px;
}

.footer-cap {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
}
.footer-cap--gap { margin-top: 30px; }

.footer-title {
  margin: 8px 0 0;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: #FFFFFF;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 22px;
  margin-top: 18px;
  list-style: none;
}

.footer-nav a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid rgba(237, 231, 220, 0.16);
  font-size: 14px;
  color: #EDE7DC;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer-nav a:hover { color: #FFFFFF; border-bottom-color: var(--red); }

.footer-issues {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  list-style: none;
}
.footer-issues li {
  padding: 5px 10px;
  border: 1px solid rgba(237, 231, 220, 0.24);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 12px;
  color: #CFC7B8;
}
.footer-issues li.is-current {
  border-color: var(--red);
  background: rgba(216, 6, 33, 0.18);
  color: #FFD9DF;
}

.footer-legal {
  margin-top: 18px;
  list-style: none;
}
.footer-legal a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid rgba(237, 231, 220, 0.16);
  font-size: 14px;
  color: #EDE7DC;
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer-legal a:hover { color: #FFFFFF; border-bottom-color: var(--green); }

.footer-contact {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 9px 16px;
  margin-top: 26px;
  font-size: 13.5px;
}
.footer-contact dt {
  padding-top: 2px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #9B9284;
}
.footer-contact dd { color: #EDE7DC; }

.footer-base {
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin: 44px auto 0;
  padding-top: 18px;
  border-top: 1px solid rgba(237, 231, 220, 0.16);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #9B9284;
}
.footer-base p { margin: 0; }

.site-footer :focus-visible { outline-color: var(--green); }

/* ---------- 11. 通用组件：按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  border-radius: 2px;
  background: var(--ink);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  box-shadow: var(--shadow-1);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
              background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn:hover {
  color: #FFFFFF;
  transform: translate(-1px, -1px);
  box-shadow: 4px 4px 0 rgba(42, 30, 27, 0.16);
}
.btn--red { background: var(--red); border-color: var(--red-deep); }
.btn--blue { background: var(--blue); border-color: var(--blue-deep); }
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--frost);
  box-shadow: none;
}
.btn--ghost:hover {
  color: var(--ink);
  border-color: var(--ink);
  transform: none;
  box-shadow: none;
}

/* ---------- 12. 通用组件：标签与状态 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--frost);
  border-radius: 2px;
  background: var(--white);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
}
.tag--red { color: var(--red); border-color: rgba(216, 6, 33, 0.36); background: rgba(216, 6, 33, 0.06); }
.tag--green { color: var(--green-deep); border-color: rgba(0, 168, 142, 0.4); background: rgba(0, 168, 142, 0.09); }
.tag--blue { color: var(--blue); border-color: rgba(27, 59, 111, 0.32); background: rgba(27, 59, 111, 0.06); }
.tag--amber { color: #8A5312; border-color: rgba(201, 120, 31, 0.42); background: rgba(201, 120, 31, 0.1); }

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--slate);
  flex: 0 0 auto;
}
.status-dot--red { background: var(--red); }
.status-dot--green { background: var(--green); }
.status-dot--blue { background: var(--blue); }

/* ---------- 13. 通用组件：卡片 ---------- */
.card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--frost);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-1);
}
.card--stack { box-shadow: 5px 5px 0 -1px var(--paper-2), 6px 6px 0 0 var(--frost); }

.card__cap {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

/* ---------- 14. 通用组件：面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0 0 22px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}
.breadcrumb li + li::before {
  content: "/";
  margin: 0 9px;
  color: var(--frost);
}
.breadcrumb a { color: var(--slate); text-decoration: none; }
.breadcrumb a:hover { color: var(--red); }

/* ---------- 15. 通用组件：数据表 ---------- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 14px;
}
.data-table caption {
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}
.data-table th,
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--frost);
  text-align: left;
  vertical-align: middle;
}
.data-table thead th {
  background: var(--mist-a);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
}
.data-table tbody tr { transition: background-color 0.16s var(--ease); }
.data-table tbody tr:hover { background: rgba(27, 59, 111, 0.05); }
.data-table .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}
.data-table:focus-visible { outline: 2px solid var(--red); outline-offset: 4px; }

/* ---------- 16. 通用组件：筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.filter-btn {
  padding: 8px 14px;
  border: 1px solid var(--frost);
  border-radius: 2px;
  background: var(--white);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.filter-btn:hover { color: var(--ink); border-color: var(--ink); }
.filter-btn[aria-pressed="true"],
.filter-btn.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: #FFFFFF;
}

[data-filter-item] { transition: opacity 0.18s var(--ease); }
[data-filter-item].is-fading { opacity: 0; }

/* ---------- 17. 通用组件：响应式图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  border: 1px solid var(--frost);
  border-radius: 2px;
  background: linear-gradient(135deg, var(--mist-a) 0%, var(--mist-b) 46%, #DCE4ED 100%);
}
.media > img,
.media > svg,
.media > video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide { aspect-ratio: 16 / 7; }
.media--banner { aspect-ratio: 21 / 9; }
.media--std { aspect-ratio: 4 / 3; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--fit { aspect-ratio: auto; }
.media--paper { box-shadow: 6px 6px 0 rgba(42, 30, 27, 0.08); }
.media--aurora::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(0, 168, 142, 0.2) 0%, rgba(0, 168, 142, 0) 44%, rgba(27, 59, 111, 0.2) 100%);
}
.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  background: rgba(42, 30, 27, 0.84);
  color: #F4F1EA;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

/* ---------- 18. 显现动效 ---------- */
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
}
html[data-js="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 19. 平板 ---------- */
@media (max-width: 1080px) {
  .issue-switch__cap { display: none; }
  .brand-sub { letter-spacing: 0.12em; }
}

@media (max-width: 980px) {
  .footer-shell { grid-template-columns: minmax(0, 1fr); gap: 40px; }
}

/* ---------- 20. 移动端（抽屉导航） ---------- */
@media (max-width: 899px) {
  :root { --gutter: 16px; }

  .tool-btn--drawer { display: inline-flex; }
  .burger { display: block; }
  .tool-btn[data-contrast-toggle] { display: none; }

  .issue-switch { display: none; }

  .header-shell { padding: 12px 0; gap: 12px; }
  .site-header[data-scrolled] .header-shell { padding: 10px 0; }

  .nav-band {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 90;
    width: min(86vw, 340px);
    margin: 0;
    padding: 22px 20px 32px;
    border: 0;
    border-left: 4px solid var(--red);
    background: var(--white);
    box-shadow: -22px 0 48px -32px rgba(42, 30, 27, 0.75);
    overflow-y: auto;
    overscroll-behavior: contain;
    transform: translateX(104%);
    visibility: hidden;
    transition: transform 0.26s var(--ease), visibility 0.26s linear;
  }
  .site-header[data-scrolled] .nav-band { border-top: 0; }
  .nav-band[data-open="true"] {
    transform: translateX(0);
    visibility: visible;
  }

  .nav-close {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    margin-bottom: 18px;
    padding: 8px 14px;
    border: 1px solid var(--frost);
    border-radius: 2px;
    background: var(--white);
    font-size: 12px;
    letter-spacing: 0.14em;
  }

  .nav-list { flex-direction: column; padding: 0; }
  .nav-list > li { flex: none; }
  .nav-list > li + li { border-left: 0; border-top: 1px solid var(--mist-a); }
  .nav-list a {
    padding: 15px 4px;
    text-align: left;
    font-size: 15px;
    letter-spacing: 0.04em;
  }
  .nav-list a::after { left: 0; right: 0; bottom: 8px; }
  .nav-list a:hover::after { left: 0; right: 42%; }
  .nav-list a[aria-current="page"]::after { left: 0; right: 42%; }

  body.nav-open { overflow: hidden; }

  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .footer-base { justify-content: flex-start; }
}

@media (min-width: 900px) {
  .nav-scrim { display: none; }
  .nav-close { display: none; }
}

/* ---------- 21. 小屏 ---------- */
@media (max-width: 620px) {
  .grid--2, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .brand-name { font-size: 15.5px; }
  .brand-mark { width: 30px; height: 30px; }
  .site-footer { padding-top: 44px; }
  .t-lead { font-size: 16px; }
}

/* ---------- 22. 降低动效 ---------- */
@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;
  }
  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .nav-band, .nav-scrim { transition: none; }
}