/* ==========================================================================
   今年会中心 — /assets/site.css
   共享外壳：reset / 令牌 / 中文排版 / 页头 / 页脚 / 通用组件 / 响应式
   ========================================================================== */

/* 1. 令牌 ---------------------------------------------------------------- */
:root {
  --ink: #162022;
  --brick-deep: #22383B;
  --brick: #2F4E52;
  --brick-mid: #5C7A7C;
  --brick-mist: #A9BEBC;
  --gold: #C9A227;
  --gold-soft: #E8D48A;
  --signal: #E2611A;
  --signal-deep: #B8430B;
  --signal-pale: #FFE1D0;
  --paper: #F6F1E7;
  --paper-deep: #E7DFD0;

  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun",
    Georgia, serif;

  --cut: 12px;
  --maxw: 1280px;
  --gutter: clamp(20px, 5vw, 72px);
  --section-gap: clamp(64px, 9vw, 140px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --edge-cut: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
}

/* 2. 重置 ---------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, ul, ol, dl, pre { margin: 0; }
ul, ol { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }

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

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

/* 3. 中文排版基座 -------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--brick-deep);
  text-wrap: balance;
}

strong, b { font-weight: 700; }

::selection {
  background: var(--gold-soft);
  color: var(--brick-deep);
}

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

.section { padding-block: var(--section-gap); }
.section--tight { padding-block: calc(var(--section-gap) * 0.55); }

.grid {
  display: grid;
  gap: clamp(24px, 3.5vw, 48px);
  align-items: start;
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }

.cut-corner {
  --cut: 12px;
  clip-path: var(--edge-cut);
}

.rule-slash {
  height: 2px;
  border: 0;
  background: repeating-linear-gradient(
    135deg,
    var(--brick-mist) 0 6px,
    transparent 6px 14px
  );
  opacity: 0.9;
}

/* 5. 章节头与文本 -------------------------------------------------------- */
.section-head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 28px;
  padding-bottom: 18px;
  margin-bottom: clamp(28px, 4vw, 52px);
  border-bottom: 2px solid var(--brick-mist);
}
.section-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 88px;
  height: 2px;
  background: var(--gold);
}
.section-index {
  font-family: var(--font-display);
  font-size: clamp(38px, 5vw, 64px);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--brick-deep);
}
.section-kicker {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--brick-mid);
  text-transform: uppercase;
}

.lede {
  font-family: var(--font-body);
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.85;
  color: var(--brick);
  max-width: 34em;
}

.prose {
  max-width: 38em;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink);
}
.prose p + p { margin-top: 1.05em; }
.prose h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--brick-deep);
  margin: 1.7em 0 0.5em;
}
.prose ul, .prose ol { margin: 0.6em 0; padding-left: 1.1em; }
.prose ul li { list-style: none; position: relative; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: -0.95em;
  top: 0.82em;
  width: 7px;
  height: 2px;
  background: var(--gold);
}
.prose strong { color: var(--brick-deep); }
.prose a {
  color: var(--signal-deep);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.meta-note {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--brick-mid);
}

/* 6. 按钮 ---------------------------------------------------------------- */
.btn {
  --cut: 12px;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 0;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.06em;
  text-decoration: none;
  background: var(--brick);
  color: var(--paper);
  clip-path: var(--edge-cut);
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease),
    transform 0.22s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 3px rgba(246, 241, 231, 0.95);
}
.btn--signal { background: var(--signal); color: #fff; }
.btn--signal:hover { background: var(--signal-deep); }
.btn--gold { background: var(--gold); color: var(--brick-deep); }
.btn--gold:hover { background: var(--gold-soft); }
.btn--ghost {
  background: transparent;
  color: var(--brick-deep);
  box-shadow: inset 0 0 0 2px var(--brick-mist);
}
.btn--ghost:hover { background: var(--paper-deep); }

/* 7. 跳转链接 ------------------------------------------------------------ */
.skip-link {
  position: absolute;
  left: 12px;
  top: -80px;
  z-index: 200;
  padding: 12px 22px;
  background: var(--brick-deep);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  clip-path: var(--edge-cut);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* 8. 页头 ---------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--paper);
  border-bottom: 1px solid var(--brick-mist);
  color: var(--ink);
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--gold) 0 18px,
    transparent 18px 34px
  );
  opacity: 0.5;
  pointer-events: none;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--maxw);
  min-height: 76px;
  margin-inline: auto;
  padding: 14px var(--gutter);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  color: var(--brick-deep);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 46px;
  background: var(--brick-deep);
  color: var(--gold-soft);
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 86%, 0 100%);
  transition: background-color 0.22s var(--ease);
}
.brand:hover .brand-mark { background: var(--brick); }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--brick-deep);
}
.brand-sub {
  margin-top: 3px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--brick-mid);
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 11px 18px;
  border: 0;
  cursor: pointer;
  background: var(--brick-deep);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  clip-path: var(--edge-cut);
}
.nav-toggle-bars {
  position: relative;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background-color 0.22s var(--ease);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease);
}
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }
.site-header[data-open] .nav-toggle-bars { background: transparent; }
.site-header[data-open] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle-label { white-space: nowrap; }

/* 导航 */
.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
}
.nav-index { display: none; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 11px;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--brick);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.nav-num {
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--brick-mist);
  font-variant-numeric: tabular-nums;
  transition: color 0.2s var(--ease);
}
.nav-link:hover { color: var(--brick-deep); background: var(--paper-deep); }
.nav-link:hover .nav-num { color: var(--gold); }
.nav-link[aria-current="page"] {
  color: var(--brick-deep);
  font-weight: 700;
  background: transparent;
}
.nav-link[aria-current="page"] .nav-num { color: var(--gold); }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 2px;
  height: 3px;
  background: var(--gold);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-ghost {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--brick);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--brick-mist);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.nav-ghost:hover { color: var(--signal-deep); border-color: var(--signal); }

/* 9. 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--brick-deep);
  color: var(--brick-mist);
  border-top: 2px solid var(--gold);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(246, 241, 231, 0.028) 0 2px,
      transparent 2px 5px
    ),
    radial-gradient(circle at 84% 10%, rgba(201, 162, 39, 0.14), transparent 58%);
  pointer-events: none;
}
.footer-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(48px, 6vw, 88px) var(--gutter) 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.1fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.5fr);
  gap: clamp(28px, 4vw, 56px);
}
.footer-col { min-width: 0; }

.footer-brand {
  display: inline-block;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--paper);
  text-decoration: none;
}
.footer-brand::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 12px;
  background: var(--gold);
}
.footer-line {
  margin-top: 16px;
  max-width: 22em;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.9;
  color: rgba(246, 241, 231, 0.82);
}
.footer-icp {
  margin-top: 18px;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--brick-mist);
}

.footer-title {
  margin-bottom: 16px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold-soft);
}
.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
}
.footer-list a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.footer-list a:hover {
  color: var(--gold-soft);
  border-color: var(--gold);
}
.footer-contact li {
  color: var(--paper);
  word-break: break-word;
}
.footer-contact li + li { margin-top: 2px; }
.footer-note {
  margin-top: 16px;
  max-width: 30em;
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.85;
  color: rgba(169, 190, 188, 0.92);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: clamp(36px, 5vw, 64px);
  padding: 20px 0 28px;
  border-top: 1px solid rgba(169, 190, 188, 0.28);
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--brick-mist);
}
.footer-time, .footer-copy { margin: 0; }

/* 10. 面包屑 ------------------------------------------------------------- */
.breadcrumbs {
  padding-block: 18px;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--brick-mid);
}
.crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}
.crumb-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.crumb-list li + li::before {
  content: "／";
  color: var(--brick-mist);
}
.crumb-list a {
  color: var(--brick);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.crumb-list a:hover { color: var(--signal-deep); }
.crumb-current { color: var(--brick-deep); font-weight: 700; }

/* 11. 目录索引 / 标签 ---------------------------------------------------- */
.index-list {
  display: flex;
  flex-direction: column;
  border-top: 2px solid var(--brick-deep);
}
.index-list li { border-bottom: 1px solid var(--brick-mist); }
.index-list a {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 4px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  color: var(--brick-deep);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease),
    padding-left 0.2s var(--ease);
}
.index-list a:hover {
  color: var(--signal-deep);
  background: var(--paper-deep);
  padding-left: 12px;
}
.index-num {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.tagbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 0;
  border-left: 3px solid var(--brick-mid);
  background: var(--paper-deep);
  color: var(--brick-deep);
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}
.tag:hover { background: var(--gold-soft); }
.tag[aria-pressed="true"],
.tag.is-active {
  background: var(--signal);
  border-left-color: var(--signal-deep);
  color: #fff;
}

/* 12. 图片容器 ----------------------------------------------------------- */
.figure { display: block; margin: 0; }
.figure-media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: linear-gradient(150deg, var(--paper-deep) 0%, var(--brick-mist) 100%);
  --cut: 12px;
  clip-path: var(--edge-cut);
}
.figure--wide .figure-media { aspect-ratio: 16 / 9; }
.figure--tall .figure-media { aspect-ratio: 3 / 4; }
.figure--square .figure-media { aspect-ratio: 1 / 1; }
.figure-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.9);
}
.figure-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(34, 56, 59, 0) 52%,
    rgba(34, 56, 59, 0.4) 100%
  );
  pointer-events: none;
}
.figure-tag {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  padding: 7px 13px;
  background: var(--brick-deep);
  color: var(--gold-soft);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
}
.figure-cap {
  margin-top: 10px;
  font-family: var(--font-sans);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--brick-mid);
}

/* 13. 滚动进度与显现 ----------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 95;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--signal) 100%);
  pointer-events: none;
  transition: width 0.08s linear;
}

html.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
html.reveal-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 14. 响应式 ------------------------------------------------------------- */
@media (max-width: 1100px) {
  .nav-link { font-size: 14px; padding: 10px 8px; }
  .nav-link[aria-current="page"]::after { left: 8px; right: 8px; }
  .nav-actions { gap: 12px; }
  .nav-ghost { display: none; }
}

@media (max-width: 980px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer-col--brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .header-inner {
    min-height: 64px;
    padding-block: 10px;
    gap: 16px;
  }
  .brand-sub { display: none; }
  .brand-mark { width: 34px; height: 40px; font-size: 18px; }
  .brand-name { font-size: 17px; }
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    max-height: 84vh;
    overflow-y: auto;
    padding: 24px var(--gutter) calc(26px + env(safe-area-inset-bottom, 0px));
    background: var(--brick-deep);
    color: var(--paper);
    transform: translateY(102%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.3s var(--ease), opacity 0.3s var(--ease),
      visibility 0.3s var(--ease);
  }
  .site-header[data-open] .site-nav {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  body.nav-open { overflow: hidden; }

  .nav-index {
    display: block;
    font-family: var(--font-sans);
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--brick-mist);
  }
  .nav-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px;
    width: 100%;
  }
  .nav-link {
    display: flex;
    width: 100%;
    padding: 14px 8px;
    font-size: 15px;
    color: var(--paper);
    border-bottom: 1px solid rgba(169, 190, 188, 0.22);
  }
  .nav-link:hover,
  .nav-link:focus-visible {
    background: rgba(246, 241, 231, 0.08);
    color: var(--gold-soft);
  }
  .nav-num { color: var(--brick-mist); }
  .nav-link[aria-current="page"] {
    color: var(--gold-soft);
    background: rgba(201, 162, 39, 0.14);
  }
  .nav-link[aria-current="page"]::after {
    left: 8px;
    right: 8px;
    bottom: 5px;
    height: 2px;
  }
  .nav-actions {
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 14px;
    border-top: 1px solid rgba(169, 190, 188, 0.22);
  }
  .nav-ghost {
    display: inline-block;
    color: var(--paper);
    border-color: var(--brick-mist);
  }
  .nav-ghost:hover { color: var(--gold-soft); border-color: var(--gold); }
}

@media (max-width: 860px) {
  .grid--2,
  .grid--3,
  .grid--7-5,
  .grid--8-4 { grid-template-columns: minmax(0, 1fr); }
  body { font-size: 16px; }
  .prose, .lede { max-width: none; }
}

@media (max-width: 640px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-base { flex-direction: column; align-items: flex-start; }
  .section-head { align-items: baseline; gap: 8px 16px; }
  .btn { padding: 12px 18px; font-size: 14px; }
}

@media (max-width: 380px) {
  .nav-list { grid-template-columns: minmax(0, 1fr); }
}

/* 15. 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;
  }
  html.reveal-ready [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .scroll-progress { transition: none; }
  .btn:hover { transform: none; }
}