/* ==========================================================================
   天博赛场 · /assets/site.css
   共享外壳与基础组件：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --ink-blue: #0B1B2B;
  --panel-blue: #12293F;
  --orange: #FF6A1A;
  --orange-soft: #FFB27A;
  --green: #1F8A57;
  --green-soft: #7FD3A4;
  --paper: #F4F1EA;
  --ink-black: #10161C;
  --ink-quiet: #535E6B;
  --silver: #C7D0D9;
  --alert: #D94F3D;

  --line-dark: rgba(199, 208, 217, 0.18);
  --line-darker: rgba(199, 208, 217, 0.10);
  --line-paper: rgba(16, 22, 28, 0.14);

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

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-18: 1.125rem;
  --fs-24: 1.5rem;

  --wrap: 1280px;
  --gutter: clamp(18px, 4vw, 44px);
  --section-y: clamp(48px, 7vw, 96px);
  --cut: 22px;
}

/* ---------- 2. Reset 与基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink-blue);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

:focus-visible {
  outline: 2px solid var(--orange-soft);
  outline-offset: 3px;
}

#main-content { scroll-margin-top: 118px; }

/* ---------- 3. 中文排版与标题层级 ---------- */
h1, .h1 {
  font-weight: 200;
  font-size: clamp(34px, 5.4vw, 84px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}
h2, .h2 {
  font-weight: 200;
  font-size: clamp(26px, 3.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.015em;
}
h3, .h3 {
  font-weight: 700;
  font-size: var(--fs-24);
  line-height: 1.32;
  letter-spacing: 0.01em;
}

.link {
  color: var(--orange);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.link:hover { color: var(--orange-soft); }
.block-read .link { color: #0E5A38; }
.block-read .link:hover { color: var(--green); }

/* ---------- 4. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 860px; }

.grid { display: grid; gap: clamp(18px, 2.6vw, 36px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr); }
.grid--asym-rev { grid-template-columns: minmax(0, 1fr) minmax(0, 1.75fr); }

/* ---------- 5. 区块 rhythm ---------- */
.section { padding: var(--section-y) 0; }

.block { padding: clamp(28px, 4.4vw, 60px); }
.block-data { background: var(--ink-blue); color: var(--paper); }
.block-graph { background: var(--panel-blue); color: var(--paper); }
.block-read { background: var(--paper); color: var(--ink-black); }

.section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: clamp(24px, 3vw, 40px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.22em;
  color: var(--orange);
  text-transform: uppercase;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--orange);
  flex: 0 0 auto;
}

.section-title {
  font-weight: 200;
  font-size: clamp(28px, 3.6vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-lead {
  font-size: var(--fs-18);
  line-height: 1.75;
  color: var(--silver);
  max-width: 64ch;
}
.block-read .section-lead { color: var(--ink-quiet); }
.block-read .eyebrow { color: var(--green); }
.block-read .eyebrow::before { background: var(--green); }
.block-read .section-title { color: var(--ink-black); }

.prose { max-width: 70ch; }
.prose p + p { margin-top: 1.1em; }
.prose strong { font-weight: 700; color: var(--paper); }
.block-read .prose strong { color: var(--ink-black); }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 20px;
  font-family: var(--font-sans);
  font-size: var(--fs-14);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.btn-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-blue);
}
.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
}
.btn-ghost {
  border-color: rgba(199, 208, 217, 0.42);
  color: var(--paper);
}
.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
}
.block-read .btn-ghost {
  border-color: rgba(16, 22, 28, 0.28);
  color: var(--ink-black);
}
.block-read .btn-ghost:hover,
.block-read .btn-ghost:focus-visible {
  border-color: var(--green);
  color: var(--green);
}
.btn-sm { padding: 8px 14px; font-size: 0.78rem; letter-spacing: 0.06em; }

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs {
  padding: 16px 0 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
}
.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumbs-item + .breadcrumbs-item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(199, 208, 217, 0.42);
}
.breadcrumbs-link {
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s ease;
}
.breadcrumbs-link:hover { color: var(--orange-soft); }
.breadcrumbs-item [aria-current="page"] { color: var(--paper); }
.block-read .breadcrumbs-link { color: var(--ink-quiet); }
.block-read .breadcrumbs-item [aria-current="page"] { color: var(--ink-black); }

/* ---------- 8. 指标、标签、表格 ---------- */
.stat { display: flex; flex-direction: column; gap: 6px; }

.stat-value {
  font-weight: 900;
  font-size: clamp(40px, 6vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat-value--accent { color: var(--orange); }
.stat-value--pass { color: var(--green-soft); }
.block-read .stat-value--pass { color: var(--green); }
.block-read .stat-value--accent { color: var(--orange); }

.stat-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--silver);
}
.block-read .stat-label { color: var(--ink-quiet); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  background: var(--panel-blue);
  border: 1px solid var(--line-dark);
  color: var(--silver);
  white-space: nowrap;
}
.tag-current {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-blue);
  font-weight: 700;
}
.tag-pass {
  background: rgba(31, 138, 87, 0.18);
  border-color: rgba(31, 138, 87, 0.55);
  color: var(--green-soft);
}
.tag-warn {
  background: rgba(217, 79, 61, 0.16);
  border-color: rgba(217, 79, 61, 0.55);
  color: #F2AFA5;
}
.block-read .tag {
  background: #E8E3D9;
  border-color: rgba(16, 22, 28, 0.16);
  color: var(--ink-black);
}
.block-read .tag-pass { background: rgba(31, 138, 87, 0.14); color: #14603C; }
.block-read .tag-warn { background: rgba(217, 79, 61, 0.12); color: #A5351F; }

.data-table {
  width: 100%;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-variant-numeric: tabular-nums;
  text-align: left;
}
.data-table caption {
  padding-bottom: 10px;
  font-family: var(--font-sans);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--silver);
  text-align: left;
}
.data-table th {
  padding: 10px 12px;
  font-weight: 500;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--silver);
  border-bottom: 1px solid var(--line-dark);
  white-space: nowrap;
}
.data-table td {
  padding: 12px;
  color: inherit;
  border-bottom: 1px solid var(--line-darker);
}
.data-table tbody tr:hover td { background: rgba(255, 106, 26, 0.07); }
.block-read .data-table caption { color: var(--ink-quiet); }
.block-read .data-table th { color: var(--ink-quiet); border-bottom-color: var(--line-paper); }
.block-read .data-table td { border-bottom-color: rgba(16, 22, 28, 0.08); }
.block-read .data-table tbody tr:hover td { background: rgba(31, 138, 87, 0.09); }

/* ---------- 9. 图形容器（供页面阶段放图） ---------- */
.media {
  position: relative;
  overflow: hidden;
  width: 100%;
  background: var(--panel-blue);
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media--placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(199, 208, 217, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(199, 208, 217, 0.13) 1px, transparent 1px);
  background-size: 38px 38px;
}
.media--placeholder::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 42%;
  background: linear-gradient(180deg, rgba(255, 106, 26, 0) 0%, rgba(255, 106, 26, 0.22) 100%);
}

.media-frame {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--silver);
}
.block-read .media-caption { color: var(--ink-quiet); }

.cut-corner {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

/* ---------- 10. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-blue);
  color: var(--paper);
  border-bottom: 1px solid var(--line-dark);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -72px;
  z-index: 120;
  padding: 10px 16px;
  background: var(--orange);
  color: var(--ink-blue);
  font-weight: 700;
  font-size: var(--fs-14);
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 12px; }

.header-inner {
  display: grid;
  grid-template-columns: minmax(212px, 24%) minmax(0, 1fr);
  align-items: stretch;
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.header-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 14px 22px 14px 0;
  border-right: 1px solid var(--line-dark);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--paper);
  text-decoration: none;
}

.brand-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--orange);
  color: var(--ink-blue);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.brand-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand-name {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.04em;
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  line-height: 1.2;
  letter-spacing: 0.12em;
  color: var(--silver);
  white-space: nowrap;
}
.brand--footer .brand-mark { width: 48px; height: 48px; font-size: 22px; }
.brand--footer .brand-name { font-size: 21px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid rgba(199, 208, 217, 0.34);
  color: var(--paper);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--orange); color: var(--orange); }

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: var(--orange);
  transition: background-color 0.2s ease;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--orange);
  transition: transform 0.25s 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 {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
}

.header-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding-left: clamp(16px, 2.4vw, 34px);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-darker);
}

.topbar-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 22px;
  min-width: 0;
}
.topbar-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s ease;
}
.topbar-link::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  background: var(--green-soft);
  transform: rotate(45deg);
}
.topbar-link:hover,
.topbar-link:focus-visible { color: var(--orange-soft); }

.header-cta { flex: 0 0 auto; white-space: nowrap; }

.site-nav { padding: 4px 0 2px; }
.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 2px;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--paper);
  text-decoration: none;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 3px;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}
.nav-link:hover { color: var(--orange-soft); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] {
  color: var(--orange);
  font-weight: 700;
}
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  background: transparent;
}
.scroll-meter-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--orange-soft) 100%);
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 11. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--ink-blue);
  color: var(--paper);
}
.site-footer::before {
  content: "";
  display: block;
  height: 2px;
  background: linear-gradient(90deg, var(--orange) 0 14%, rgba(199, 208, 217, 0.22) 14% 100%);
}

.footer-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) var(--gutter) 26px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(28px, 3.4vw, 46px);
  border-bottom: 1px solid var(--line-dark);
}

.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.footer-tagline {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--silver);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 36px);
}
.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--orange);
}
.footer-links { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  font-size: var(--fs-14);
  color: var(--silver);
  text-decoration: none;
  transition: color 0.2s ease;
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.footer-link--strong { color: var(--paper); }

.footer-contact {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 28px);
  padding: clamp(24px, 3vw, 38px) 0;
  border-bottom: 1px solid var(--line-dark);
}
.footer-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.footer-contact-key {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--silver);
}
.footer-contact-value {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  color: var(--paper);
  word-break: break-all;
}

.copy-btn {
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  background: transparent;
  border: 1px solid var(--line-dark);
  color: var(--silver);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}
.copy-btn:hover { border-color: var(--orange); color: var(--orange); }
.copy-btn[data-copied] {
  border-color: var(--green);
  color: var(--green-soft);
  background: rgba(31, 138, 87, 0.16);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 22px;
}
.footer-note {
  max-width: 56ch;
  font-size: var(--fs-14);
  color: var(--silver);
}
.footer-copyright {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--silver);
}

.to-top {
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  background: transparent;
  border: 1px solid rgba(199, 208, 217, 0.34);
  color: var(--paper);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}
.to-top:hover { border-color: var(--orange); color: var(--orange); }

/* ---------- 12. 显现动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--reveal-delay, 0ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (scripting: none) {
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- 13. 响应式 ---------- */
@media (max-width: 1180px) {
  .topbar-list { gap: 4px 16px; }
  .topbar-link { font-size: 0.7rem; }
}

@media (max-width: 960px) {
  .header-inner { grid-template-columns: minmax(0, 1fr); }

  .header-bar {
    padding: 13px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line-darker);
  }
  .nav-toggle { display: inline-flex; }

  .header-panel {
    display: none;
    padding-left: 0;
    padding-bottom: 16px;
  }
  .site-header[data-open] .header-panel { display: flex; }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 0;
  }
  .topbar-list { flex-direction: column; align-items: flex-start; gap: 10px; }
  .topbar-link { font-size: 0.76rem; }
  .header-cta { width: 100%; }

  .site-nav { padding: 0; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-link {
    display: block;
    padding: 13px 0;
    font-size: 17px;
    border-bottom: 1px solid var(--line-darker);
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    padding-left: 14px;
    border-left: 3px solid var(--orange);
  }

  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
  .footer-contact { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
}

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

@media (max-width: 620px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { grid-template-columns: minmax(0, 1fr); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .brand-sub { display: none; }
  .brand--footer .brand-sub { display: block; }
}

/* ---------- 14. 动效降级 ---------- */
@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;
  }
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}