/* ==========================================================================
   全站登录 · EMC 新版资料入口 — 共享样式 /assets/site.css
   深海蓝承重 + 青绿操作 + 琥珀提示 + 冷雾纸面
   ========================================================================== */

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

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

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }

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

table { border-collapse: collapse; border-spacing: 0; width: 100%; }

hr { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  --blue-900: #0B2136;
  --blue-700: #163B5C;
  --teal-600: #0F7E7C;
  --teal-700: #0C6D6B;
  --teal-300: #86C9C4;
  --amber-500: #DFA22C;
  --fog-050: #F3F5F6;
  --fog-200: #E2E7E9;
  --ink-700: #2B3945;
  --ink-500: #55636E;
  --green-600: #2E8B62;
  --glass: rgba(255, 255, 255, 0.62);
  --line: #D5DDE0;
  --line-strong: #BCD2D0;

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

  --shell: 1200px;
  --gutter: clamp(18px, 4vw, 48px);
  --gap: 8px;

  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 18px;

  --dur: 180ms;
  --ease: cubic-bezier(0.32, 0.72, 0.24, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-700);
  background-color: var(--fog-050);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(223, 162, 44, 0.35);
  color: var(--blue-900);
}

:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 2px;
  border-radius: 2px;
}

#main-content { display: block; scroll-margin-top: 96px; }
[data-section] { scroll-margin-top: 96px; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ---------- 4. 跳至主内容 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -64px;
  z-index: 200;
  padding: 10px 16px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-900);
  background: var(--amber-500);
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 0; }

/* ---------- 5. 头部命令栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  color: var(--fog-050);
  background-color: var(--blue-900);
  border-bottom: 1px solid rgba(134, 201, 196, 0.28);
}

.site-header__bar {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 14px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 56px;
}

/* 品牌锁定 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 6px 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 26px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal-300);
  background: rgba(15, 126, 124, 0.18);
  border: 1px solid var(--teal-600);
  border-radius: var(--radius-s);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--fog-050);
}

.brand__sub {
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: rgba(243, 245, 246, 0.6);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  color: var(--amber-500);
  border-color: var(--amber-500);
}

/* 版本标签 */
.version-tag {
  align-self: center;
  flex: 0 0 auto;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--amber-500);
  background: rgba(223, 162, 44, 0.1);
  border: 1px solid rgba(223, 162, 44, 0.55);
  border-radius: 999px;
}

/* 导航 */
.site-nav {
  display: flex;
  align-items: stretch;
  gap: 8px;
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: block;
  padding: 0 11px;
  font-family: var(--font-ui);
  font-size: 13.5px;
  letter-spacing: 0.01em;
  line-height: 56px;
  color: rgba(243, 245, 246, 0.76);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 10px;
  height: 2px;
  background: var(--amber-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.site-nav__link:hover {
  color: #FFFFFF;
  background-color: rgba(226, 231, 233, 0.1);
}

.site-nav__link:focus-visible { outline-offset: -3px; }

.site-nav__link[aria-current="page"] {
  color: #FFFFFF;
  background-color: rgba(226, 231, 233, 0.08);
}

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

/* 快捷动作 */
.nav-quick {
  display: inline-flex;
  align-items: center;
  align-self: center;
  flex: 0 0 auto;
  margin-left: 10px;
  padding: 6px 13px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  color: var(--teal-300);
  border: 1px solid rgba(134, 201, 196, 0.45);
  border-radius: 999px;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.nav-quick:hover {
  color: #FFFFFF;
  background-color: var(--teal-600);
  border-color: var(--teal-600);
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  align-self: center;
  margin-left: auto;
  padding: 8px 10px;
  font-family: var(--font-ui);
  font-size: 13px;
  color: var(--fog-050);
  border: 1px solid rgba(134, 201, 196, 0.4);
  border-radius: var(--radius-s);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--teal-300); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background-color var(--dur) var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), top var(--dur) var(--ease);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.nav-toggle__text {
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: 0.04em;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* 移动端路径条 */
.header-path {
  display: none;
  align-items: center;
  gap: 10px;
  height: 32px;
  padding: 0 var(--gutter);
  background-color: var(--blue-700);
  border-top: 1px solid rgba(134, 201, 196, 0.2);
  font-family: var(--font-ui);
  font-size: 12.5px;
}

.header-path__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--teal-300);
  transition: color var(--dur) var(--ease);
}

.header-path__back:hover { color: var(--amber-500); }

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--amber-500);
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  pointer-events: none;
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  margin-top: clamp(48px, 8vw, 96px);
  color: rgba(243, 245, 246, 0.78);
  background-color: var(--blue-900);
  border-top: 2px solid var(--teal-600);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(4, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 40px) 24px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) clamp(28px, 4vw, 40px);
}

.footer-brand { max-width: 30ch; }

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--fog-050);
}

.footer-brand__sub {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--teal-300);
}

.footer-brand__note {
  margin-top: 14px;
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.75;
  color: rgba(243, 245, 246, 0.62);
}

.footer-brand__cta {
  display: inline-flex;
  align-items: center;
  margin-top: 18px;
  padding: 8px 14px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  color: var(--fog-050);
  border: 1px solid rgba(134, 201, 196, 0.5);
  border-radius: var(--radius-s);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-brand__cta:hover {
  color: var(--blue-900);
  background-color: var(--teal-300);
  border-color: var(--teal-300);
}

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

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--teal-300);
}

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

.footer-col__link {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.5;
  color: rgba(243, 245, 246, 0.72);
  transition: color var(--dur) var(--ease);
}

.footer-col__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--amber-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.footer-col__link:hover { color: var(--fog-050); }
.footer-col__link:hover::after { transform: scaleX(1); }

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 24px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 28px;
  border-top: 1px solid rgba(134, 201, 196, 0.18);
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.7;
  color: rgba(243, 245, 246, 0.58);
}

.site-footer__copy { white-space: nowrap; }

.site-footer__contact {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.01em;
  color: rgba(243, 245, 246, 0.66);
}

.site-footer__icp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(243, 245, 246, 0.5);
}

/* ---------- 7. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(40px, 6vw, 76px); }
.section--tight { padding-block: clamp(26px, 4vw, 44px); }
.section--fog { background-color: var(--fog-200); }

.section--ink {
  background-color: var(--blue-900);
  color: var(--fog-050);
}

.section--ink .h-display,
.section--ink .h-section { color: var(--fog-050); }
.section--ink .eyebrow { color: var(--teal-300); }

.stack > * + * { margin-top: 16px; }

/* 文档式双栏骨架 */
.layout-doc {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

/* ---------- 8. 排版组件 ---------- */
.h-display {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--blue-900);
  text-align: left;
}

.h-section {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--blue-900);
  text-align: left;
}

.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal-600);
}

.num {
  font-family: var(--font-mono);
  font-size: 1.15em;
  font-weight: 700;
  line-height: 1.2;
  color: var(--amber-500);
  font-variant-numeric: tabular-nums;
}

/* ---------- 9. 正文 ---------- */
.prose {
  max-width: 38em;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-700);
}

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

.prose h2,
.prose h3,
.prose h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--blue-900);
}

.prose h2 { font-size: 22px; }
.prose h3 { font-size: 17px; }

.prose ul,
.prose ol { margin-top: 1.1em; }

.prose ul li {
  position: relative;
  padding-left: 20px;
}

.prose ul li + li,
.prose ol li + li { margin-top: 0.5em; }

.prose ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.78em;
  width: 8px;
  height: 1px;
  background: var(--teal-600);
}

.prose ol { counter-reset: prose-ol; }

.prose ol li {
  position: relative;
  padding-left: 28px;
  counter-increment: prose-ol;
}

.prose ol li::before {
  content: counter(prose-ol, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.15em;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--amber-500);
}

.prose a {
  color: var(--teal-600);
  border-bottom: 1px solid rgba(15, 126, 124, 0.35);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.prose a:hover {
  color: var(--blue-900);
  border-bottom-color: var(--amber-500);
}

.prose strong { font-weight: 700; color: var(--blue-900); }

.prose blockquote {
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--teal-300);
  color: var(--ink-500);
}

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  text-align: center;
  color: var(--blue-900);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.btn--primary {
  color: #FFFFFF;
  background-color: var(--teal-600);
  border-color: var(--teal-600);
}

.btn--primary:hover {
  background-color: var(--teal-700);
  border-color: var(--teal-700);
}

.btn--ghost {
  color: var(--blue-900);
  background-color: transparent;
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  color: var(--teal-600);
  border-color: var(--teal-600);
}

.btn--amber {
  color: var(--blue-900);
  background-color: var(--amber-500);
  border-color: var(--amber-500);
}

.btn--amber:hover {
  color: var(--blue-900);
  background-color: transparent;
  border-color: var(--amber-500);
}

.btn--quiet {
  padding-inline: 0;
  color: var(--teal-600);
  border-color: transparent;
}

.btn--quiet:hover { color: var(--blue-900); }

/* ---------- 11. 卡片与 Bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(18px, 2.4vw, 26px);
  color: var(--ink-700);
  background-color: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.card:hover {
  border-color: var(--teal-600);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -24px rgba(11, 33, 54, 0.8);
}

.card--glass {
  background-color: var(--glass);
  border-color: rgba(134, 201, 196, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: var(--blue-900);
}

.card--ink {
  color: var(--fog-050);
  background-color: var(--blue-900);
  border-color: var(--blue-700);
}

.card--ink:hover { border-color: var(--teal-300); }

/* ---------- 12. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  font-family: var(--font-ui);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--ink-500);
  background-color: var(--fog-050);
  border: 1px solid var(--line-strong);
  border-radius: 3px;
}

.tag--version {
  font-family: var(--font-mono);
  color: #8A5F0C;
  background-color: rgba(223, 162, 44, 0.13);
  border-color: rgba(223, 162, 44, 0.6);
}

.tag--live {
  color: var(--green-600);
  background-color: rgba(46, 139, 98, 0.1);
  border-color: rgba(46, 139, 98, 0.45);
}

/* ---------- 13. 图像容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--fog-200);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
}

.media > img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--device { aspect-ratio: 3 / 4; }

.media__frame {
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(134, 201, 196, 0.7);
  border-radius: 6px;
  pointer-events: none;
}

.media__caption {
  margin-top: 8px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-500);
}

/* ---------- 14. 表格 ---------- */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-s);
}

.table {
  width: 100%;
  min-width: 520px;
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.6;
  background-color: #FFFFFF;
  border: 1px solid var(--line);
}

.table caption {
  padding-bottom: 8px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  text-align: left;
  color: var(--ink-500);
}

.table th {
  padding: 10px 14px;
  font-weight: 500;
  text-align: left;
  vertical-align: bottom;
  color: var(--fog-050);
  background-color: var(--blue-700);
  border-bottom: 1px solid var(--blue-700);
}

.table td {
  padding: 10px 14px;
  vertical-align: top;
  border-top: 1px solid var(--line);
}

.table tbody tr:nth-child(even) { background-color: var(--fog-050); }
.table tbody tr:hover { background-color: rgba(134, 201, 196, 0.18); }

/* ---------- 15. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-500);
}

.breadcrumb a {
  color: var(--teal-600);
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover { color: var(--blue-900); }

.breadcrumb__sep {
  color: #9AA9B4;
  font-family: var(--font-mono);
}

.breadcrumb [aria-current="page"] {
  font-weight: 500;
  color: var(--ink-700);
}

/* ---------- 16. 侧边文档索引 ---------- */
.doc-index {
  position: sticky;
  top: 88px;
  font-family: var(--font-ui);
}

.doc-index__title {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal-600);
}

.doc-index__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.doc-index__link {
  display: block;
  padding: 7px 10px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-500);
  border-left: 2px solid var(--fog-200);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.doc-index__link:hover {
  color: var(--blue-900);
  background-color: var(--fog-050);
  border-left-color: var(--teal-300);
}

.doc-index__link[aria-current="true"] {
  font-weight: 700;
  color: var(--blue-900);
  background-color: rgba(223, 162, 44, 0.08);
  border-left-color: var(--amber-500);
}

/* ---------- 17. 核对清单 ---------- */
.checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}

.checklist__box {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  appearance: none;
  -webkit-appearance: none;
  background-color: #FFFFFF;
  border: 1.5px solid var(--line-strong);
  border-radius: 3px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.checklist__box:hover { border-color: var(--teal-600); }

.checklist__box:checked {
  background-color: var(--green-600);
  border-color: var(--green-600);
}

.checklist__box:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 5px;
  height: 10px;
  border: 2px solid #FFFFFF;
  border-top: 0;
  border-left: 0;
  transform: rotate(45deg);
}

.checklist__label {
  font-family: var(--font-ui);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-700);
  transition: color var(--dur) var(--ease);
}

.checklist__box:checked + .checklist__label {
  color: var(--green-600);
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

/* ---------- 18. 提示块 ---------- */
.callout {
  padding: 14px 18px;
  font-family: var(--font-ui);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-700);
  background-color: rgba(223, 162, 44, 0.09);
  border-left: 3px solid var(--amber-500);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

/* ---------- 19. 工具类 ---------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1180px) {
  .site-nav__link { padding: 0 8px; font-size: 13px; }
  .site-nav__link::after { left: 8px; right: 8px; }
}

@media (max-width: 1024px) {
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; max-width: 46ch; }
}

@media (max-width: 900px) {
  .site-header__bar {
    flex-wrap: wrap;
    align-items: center;
    padding-bottom: 0;
  }

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

  .site-nav {
    display: none;
    order: 9;
    flex: 0 0 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    margin: 0;
    padding: 6px 0 14px;
    border-top: 1px solid rgba(134, 201, 196, 0.22);
  }

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

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

  .site-nav__link {
    padding: 12px 0;
    line-height: 1.45;
    border-bottom: 1px solid rgba(226, 231, 233, 0.08);
  }

  .site-nav__link::after {
    left: 0;
    right: auto;
    bottom: 7px;
    width: 24px;
  }

  .nav-quick {
    align-self: stretch;
    justify-content: center;
    margin: 14px 0 0;
    padding: 10px 14px;
  }

  .header-path { display: flex; }

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

  .doc-index {
    position: static;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line);
  }

  .doc-index__list {
    flex-direction: row;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
  }

  .doc-index__link {
    padding: 6px 10px;
    white-space: nowrap;
    border-left: 0;
    border-bottom: 2px solid var(--fog-200);
  }

  .doc-index__link:hover { border-left-color: transparent; }
  .doc-index__link[aria-current="true"] {
    border-left-color: transparent;
    border-bottom-color: var(--amber-500);
  }

  .h-display { font-size: 34px; }
  .h-section { font-size: 26px; }

  .prose { font-size: 16px; line-height: 1.8; }

  .bento { grid-template-columns: repeat(6, minmax(0, 1fr)); }

  .site-footer__legal { flex-direction: column; gap: 6px; }
  .site-footer__contact { font-size: 11.5px; }
}

@media (max-width: 600px) {
  .brand__sub { display: none; }
  .brand__mark { width: 32px; height: 24px; }
  .version-tag { padding: 1px 6px; font-size: 10.5px; }

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

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

  .table { min-width: 440px; }
}

/* ---------- 21. 减弱动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .card:hover { transform: none; }
}