/* ============================================================
   国米品牌站 · 共享样式表  /assets/site.css
   深夜蓝 + 竞技黑 + 高亮青蓝：堆叠面板式数字竞技场
   ============================================================ */

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

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

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

ul, ol { list-style: none; }

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  line-height: 1;
}

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

/* ---------- 2. 设计变量 ---------- */
:root {
  --c-night: #0B1B3A;
  --c-black: #06070C;
  --c-mid: #14295C;
  --c-line: #1E3A6B;
  --c-silver: #C7D0DE;
  --c-cyan: #22C7FF;
  --c-mint: #66F2D0;
  --c-paper: #F2F5FA;
  --c-muted: #9AA9BF;
  --grad-neon: linear-gradient(120deg, #3A8DFF, #22C7FF);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "Cascadia Mono", "Roboto Mono",
    Consolas, "Liberation Mono", Menlo, monospace;

  --w-max: 1320px;
  --pad-x: clamp(1.1rem, 4vw, 3.2rem);
  --header-h: 68px;

  --r-sm: 2px;
  --r-md: 6px;
  --r-lg: 12px;

  --shadow-panel: 0 18px 48px -22px rgba(3, 8, 22, 0.92);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--c-black);
  background-image:
    radial-gradient(1100px 620px at 82% -8%, rgba(34, 199, 255, 0.13), transparent 62%),
    radial-gradient(900px 540px at 6% 14%, rgba(58, 141, 255, 0.10), transparent 66%);
  background-repeat: no-repeat;
  color: var(--c-paper);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.78;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

@media (min-width: 961px) {
  body { background-attachment: fixed; }
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

h1 { font-size: clamp(2.35rem, 6vw, 4rem); }
h2 { font-size: clamp(1.85rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.4rem, 2.6vw, 2rem); }
h4 { font-size: clamp(1.15rem, 2vw, 1.5rem); }

p { max-width: 72ch; }

strong { color: var(--c-paper); font-weight: 700; }

::selection {
  background: rgba(34, 199, 255, 0.32);
  color: var(--c-paper);
}

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

/* ---------- 4. 无障碍与工具类 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 0.62rem 1.05rem;
  background: var(--grad-neon);
  color: #04121f;
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--r-sm);
  transform: translateY(-180%);
  transition: transform 0.24s var(--ease);
}

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

.visually-hidden {
  position: absolute !important;
  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;
}

.muted { color: var(--c-muted); }

/* ---------- 5. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

#main-content {
  display: block;
  padding-top: clamp(0.6rem, 2vw, 1.6rem);
}

.section {
  position: relative;
  padding-block: clamp(2.4rem, 6vw, 5rem);
}

.section + .section {
  border-top: 1px solid rgba(30, 58, 107, 0.55);
}

.sec-head {
  max-width: 70ch;
  margin-bottom: clamp(1.2rem, 2.8vw, 2.1rem);
}

.sec-index {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.sec-index::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: var(--grad-neon);
}

.sec-title {
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  color: var(--c-paper);
}

.sec-lead {
  margin-top: 0.85rem;
  max-width: 62ch;
  font-size: 1.02rem;
  line-height: 1.72;
  color: var(--c-silver);
}

.divider {
  height: 1px;
  border: 0;
  margin: clamp(1.6rem, 4vw, 3rem) 0;
  background: linear-gradient(90deg, var(--c-line), rgba(30, 58, 107, 0));
}

/* ---------- 6. 网格系统 ---------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.8rem);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(238px, 1fr)); }

.grid-asym {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.5rem);
  grid-template-columns: 1fr;
}

@media (min-width: 900px) {
  .grid-asym {
    grid-template-columns: minmax(0, 1.55fr) minmax(260px, 1fr);
  }
}

/* ---------- 7. 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(1.15rem, 2.6vw, 2rem);
  background: linear-gradient(180deg, var(--c-night) 0%, rgba(11, 27, 58, 0.72) 100%);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-panel);
}

.panel-raised {
  background: linear-gradient(180deg, var(--c-mid) 0%, rgba(20, 41, 92, 0.78) 100%);
}

.panel-accent::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14%;
  bottom: 14%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--grad-neon);
  box-shadow: 0 0 18px rgba(34, 199, 255, 0.55);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  text-align: center;
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease),
    background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.btn-primary {
  background: var(--grad-neon);
  color: #04121f;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px -16px rgba(34, 199, 255, 0.9);
}

.btn-ghost {
  border-color: var(--c-line);
  background: rgba(20, 41, 92, 0.45);
  color: var(--c-silver);
}

.btn-ghost:hover {
  border-color: var(--c-cyan);
  color: var(--c-paper);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}

/* ---------- 9. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.24rem 0.62rem;
  border: 1px solid var(--c-line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-silver);
  white-space: nowrap;
}

.tag-live {
  color: var(--c-mint);
  border-color: rgba(102, 242, 208, 0.42);
  background: rgba(102, 242, 208, 0.08);
}

/* ---------- 10. 图片容器 ---------- */
.frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background:
    linear-gradient(140deg, var(--c-mid) 0%, var(--c-night) 55%, var(--c-black) 100%);
  background-image:
    linear-gradient(140deg, rgba(34, 199, 255, 0.16), rgba(6, 7, 12, 0) 58%),
    repeating-linear-gradient(90deg, rgba(30, 58, 107, 0.55) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, rgba(30, 58, 107, 0.55) 0 1px, transparent 1px 48px);
}

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

.frame-wide { aspect-ratio: 21 / 9; }
.frame-tall { aspect-ratio: 3 / 4; }
.frame-square { aspect-ratio: 1 / 1; }

.frame-tilt {
  clip-path: polygon(0 0, 100% 0, 100% 86%, 88% 100%, 0 100%);
}

.frame-shade {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(200deg, rgba(34, 199, 255, 0.16), transparent 48%),
    linear-gradient(0deg, rgba(6, 7, 12, 0.74), transparent 62%);
}

/* ---------- 11. 索引列表 ---------- */
.index-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.index-list > li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  padding: 0.78rem 0;
  border-bottom: 1px solid rgba(30, 58, 107, 0.6);
  color: var(--c-silver);
  font-size: 0.97rem;
}

.index-key {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-cyan);
  white-space: nowrap;
}

.index-val { min-width: 0; }

/* ---------- 12. 面包屑 ---------- */
.breadcrumb {
  margin-top: clamp(0.9rem, 2.2vw, 1.7rem);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--c-muted);
}

.breadcrumb-list li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--c-line);
}

.breadcrumb-list a {
  color: var(--c-silver);
  transition: color 0.16s var(--ease);
}

.breadcrumb-list a:hover { color: var(--c-cyan); }

/* ---------- 13. 正文容器 ---------- */
.prose > * + * { margin-top: 1.05em; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose p { color: var(--c-silver); max-width: 72ch; }
.prose ul,
.prose ol { padding-left: 1.2rem; color: var(--c-silver); }
.prose ul { list-style: none; }
.prose ul > li { position: relative; padding-left: 0.9rem; }
.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 2px;
  background: var(--grad-neon);
}
.prose ol { list-style: decimal; }
.prose ol > li { padding-left: 0.35rem; }
.prose li + li { margin-top: 0.5em; }
.prose a {
  color: var(--c-cyan);
  border-bottom: 1px solid rgba(34, 199, 255, 0.36);
  transition: border-color 0.16s var(--ease);
}
.prose a:hover { border-bottom-color: var(--c-cyan); }

/* ============================================================
   14. 共享头部
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 7, 12, 0.9);
  border-bottom: 1px solid var(--c-line);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}

@supports not ((-webkit-backdrop-filter: blur(4px)) or (backdrop-filter: blur(4px))) {
  .site-header { background: rgba(6, 7, 12, 0.98); }
}

.header-inner {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
  min-height: var(--header-h);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(0.7rem, 2vw, 2rem);
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex: none;
  padding-block: 0.5rem;
}

.brand-mark {
  position: relative;
  display: block;
  flex: none;
  width: 24px;
  height: 24px;
  background: var(--grad-neon);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 58% 100%, 0 100%);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 5px 5px 5px 5px;
  background: var(--c-black);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 58% 100%, 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.14rem;
  line-height: 1.1;
}

.brand-name {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

/* 命令栏导航 */
.cmd-nav { min-width: 0; }

.cmd-list {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: clamp(0.05rem, 0.7vw, 0.45rem);
}

.cmd-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.52rem 0.7rem;
  border-radius: var(--r-sm);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-silver);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.cmd-index {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: #5C7099;
  transition: color 0.18s var(--ease);
}

.cmd-label { display: inline-block; }

.cmd-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-line);
  transition: background-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.cmd-link:hover {
  color: var(--c-paper);
  background: rgba(34, 199, 255, 0.09);
}

.cmd-link:hover .cmd-index { color: var(--c-cyan); }

.cmd-link[aria-current="page"] {
  color: var(--c-paper);
  background: linear-gradient(180deg, rgba(34, 199, 255, 0.2), rgba(34, 199, 255, 0.04));
}

.cmd-link[aria-current="page"] .cmd-index { color: var(--c-cyan); }

.cmd-link[aria-current="page"] .cmd-dot {
  background: var(--c-cyan);
  box-shadow: 0 0 0 3px rgba(34, 199, 255, 0.2);
}

/* 右侧状态入口 */
.header-side {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: none;
}

.pc-entry {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background: rgba(20, 41, 92, 0.5);
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--c-silver);
  white-space: nowrap;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease),
    box-shadow 0.18s var(--ease);
}

.pc-entry:hover {
  border-color: var(--c-cyan);
  color: var(--c-paper);
  box-shadow: 0 0 0 1px rgba(34, 199, 255, 0.35),
    0 10px 26px -16px rgba(34, 199, 255, 0.85);
}

.pc-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 9px rgba(34, 199, 255, 0.9);
  animation: pc-pulse 2.6s var(--ease) infinite;
}

@keyframes pc-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.38; }
}

.pc-label { display: inline-block; }

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.72rem;
  border: 1px solid var(--c-line);
  border-radius: var(--r-sm);
  background: rgba(20, 41, 92, 0.5);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-silver);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--c-cyan);
  color: var(--c-paper);
}

.nav-toggle-glyph {
  position: relative;
  display: block;
  width: 16px;
  height: 12px;
  flex: none;
}

.nav-toggle-glyph::before,
.nav-toggle-glyph::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), top 0.22s var(--ease);
}

.nav-toggle-glyph::before { top: 1px; }
.nav-toggle-glyph::after { top: 9px; }

.site-header[data-open] .nav-toggle-glyph::before {
  top: 5px;
  transform: rotate(45deg);
}

.site-header[data-open] .nav-toggle-glyph::after {
  top: 5px;
  transform: rotate(-45deg);
}

.nav-toggle-text { display: inline-block; }

/* 滚动进度线 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--grad-neon);
  box-shadow: 0 0 10px rgba(34, 199, 255, 0.8);
  pointer-events: none;
}

/* ---------- 15. 头部响应式 ---------- */
@media (max-width: 1180px) and (min-width: 961px) {
  .cmd-link { padding: 0.5rem 0.52rem; font-size: 0.88rem; }
  .cmd-index { font-size: 0.62rem; }
}

@media (max-width: 960px) {
  :root { --header-h: 60px; }

  .header-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.6rem;
  }

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

  .cmd-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 0.9rem var(--pad-x) 1.8rem;
    background: linear-gradient(180deg, rgba(6, 7, 12, 0.99) 0%, rgba(11, 27, 58, 0.99) 100%);
    border-bottom: 1px solid var(--c-line);
    box-shadow: 0 26px 50px -26px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease),
      visibility 0.22s linear;
  }

  .site-header[data-open] .cmd-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .cmd-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .cmd-link {
    justify-content: flex-start;
    padding: 0.88rem 0.5rem;
    border-bottom: 1px solid rgba(30, 58, 107, 0.55);
    border-radius: 0;
    font-size: 1rem;
  }

  .cmd-link .cmd-dot { margin-left: auto; }

  .cmd-link[aria-current="page"] {
    background: linear-gradient(90deg, rgba(34, 199, 255, 0.18), transparent 72%);
  }

  .brand-sub { display: none; }
}

@media (max-width: 420px) {
  .brand-name { font-size: 0.95rem; }
  .pc-entry { padding: 0.46rem 0.6rem; font-size: 0.78rem; }
  .nav-toggle { padding: 0.46rem 0.58rem; font-size: 0.78rem; }
  .nav-toggle-text { display: none; }
}

/* ============================================================
   16. 共享页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  background: var(--c-black);
  border-top: 1px solid var(--c-line);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: clamp(90px, 18%, 240px);
  height: 2px;
  background: var(--grad-neon);
}

.footer-inner {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: clamp(2.4rem, 5vw, 4rem) var(--pad-x) clamp(1.8rem, 3vw, 2.6rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.7rem, 4vw, 2.4rem);
}

@media (min-width: 620px) {
  .footer-inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .footer-inner {
    grid-template-columns: minmax(190px, 1.4fr) repeat(4, minmax(120px, 1fr));
    gap: clamp(1.3rem, 2.6vw, 2.6rem);
  }
}

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

.footer-mark {
  display: block;
  width: 22px;
  height: 22px;
  margin-bottom: 0.9rem;
  background: var(--grad-neon);
  clip-path: polygon(0 0, 100% 0, 100% 62%, 58% 100%, 0 100%);
}

.footer-brand-name {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-paper);
  max-width: none;
}

.footer-brand-note {
  margin-top: 0.34rem;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-muted);
  max-width: 26ch;
}

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

.footer-title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.footer-list {
  display: grid;
  gap: 0.18rem;
}

.footer-list a {
  display: inline-block;
  padding: 0.2rem 0;
  font-size: 0.94rem;
  color: var(--c-silver);
  transition: color 0.16s var(--ease), transform 0.16s var(--ease);
}

.footer-list a:hover {
  color: var(--c-cyan);
  transform: translateX(2px);
}

.footer-contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  padding: 0.2rem 0;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--c-silver);
  word-break: break-word;
}

.contact-key {
  flex: none;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--c-muted);
}

.footer-base {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 1.05rem var(--pad-x) 1.7rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.4rem;
  border-top: 1px solid rgba(30, 58, 107, 0.7);
}

.footer-base-note,
.footer-legal {
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--c-muted);
}

/* ============================================================
   17. 渐显与减少动态
   ============================================================ */
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

html.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

@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;
  }

  .pc-dot { animation: none; opacity: 1; }

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