/* =========================================================
   必发体育 · 共享样式 /assets/site.css
   深空黑轨道 + 暖纸白正文 + 电光蓝 / 琥珀橙 / 胡杨金强调
   ========================================================= */

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

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

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

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

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

main { display: block; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #070B14;
  --ink-2: #0A1120;
  --panel: #0E1626;
  --panel-2: #162033;

  --blue: #2D7DFF;
  --amber: #FF8A3D;
  --gold: #E8B44A;
  --mint: #23D6A5;
  --magenta: #FF3D8B;
  --paper: #F4EBDD;
  --muted: #8A9BB8;

  --line: rgba(138, 155, 184, 0.22);
  --line-strong: rgba(138, 155, 184, 0.42);
  --line-blue: rgba(45, 125, 255, 0.45);

  --rail: 112px;
  --topbar: 62px;
  --gutter: clamp(18px, 4vw, 56px);
  --maxw: 1320px;

  --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;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, Georgia, serif;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --dur: 200ms;
  --z-header: 60;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  padding-top: var(--topbar);
  background-color: var(--ink);
  background-image:
    radial-gradient(900px 520px at 84% -140px, rgba(255, 138, 61, 0.13), transparent 70%),
    radial-gradient(760px 480px at 4% 8%, rgba(45, 125, 255, 0.11), transparent 72%),
    linear-gradient(90deg, rgba(138, 155, 184, 0.055) 1px, transparent 1px),
    linear-gradient(0deg, rgba(138, 155, 184, 0.055) 1px, transparent 1px);
  background-size: auto, auto, 120px 120px, 120px 120px;
  background-attachment: fixed, fixed, scroll, scroll;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  color: var(--paper);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.6rem, 6vw, 5.6rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.5rem); line-height: 1.25; }
h4 { font-size: 1.05rem; line-height: 1.35; }

p { max-width: 68ch; }

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

small { font-size: 0.78rem; }

.num,
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

::selection { background: var(--amber); color: #0A0507; }

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

#main-content { scroll-margin-top: calc(var(--topbar) + 16px); }

/* ---------- 4. 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--wide { max-width: none; }

.grid-12 {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2vw, 1.75rem);
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

/* ---------- 5. 通用文字组件 ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
  flex: 0 0 auto;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.4rem;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: transparent;
  color: var(--paper);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.btn:hover {
  border-color: var(--amber);
  color: var(--amber);
  transform: translateY(-1px);
}

.btn--primary {
  border-color: transparent;
  background: linear-gradient(115deg, var(--amber), #FF6A2A);
  color: #140803;
}

.btn--primary:hover {
  background: linear-gradient(115deg, #FFA05F, var(--amber));
  color: #140803;
}

.btn--ghost {
  border-color: var(--line-blue);
  color: var(--blue);
}

.btn--ghost:hover {
  border-color: var(--blue);
  color: var(--paper);
  background: rgba(45, 125, 255, 0.12);
}

.btn__num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  opacity: 0.72;
}

/* ---------- 7. 展览标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  white-space: nowrap;
}

.tag--gold { border-color: rgba(232, 180, 74, 0.6); color: var(--gold); }
.tag--blue { border-color: rgba(45, 125, 255, 0.6); color: var(--blue); }
.tag--amber { border-color: rgba(255, 138, 61, 0.65); color: var(--amber); }

/* ---------- 8. 面包屑 ---------- */
.breadcrumb {
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--line);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.breadcrumb__item { display: flex; align-items: center; }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line-strong);
}

.breadcrumb__link:hover { color: var(--amber); }

.breadcrumb__current { color: var(--paper); }

/* ---------- 9. 面板与数据表基础 ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: clamp(1rem, 2vw, 1.6rem);
}

.panel--flush { padding: 0; }

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}

.data-table { font-size: 0.9rem; }

.data-table th {
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--muted);
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}

.data-table td {
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.data-table tbody tr:nth-child(odd) { background: rgba(22, 32, 51, 0.5); }

/* ---------- 10. 图片容器基础（页面阶段放占位） ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: 0;
  background: linear-gradient(150deg, var(--panel-2), var(--ink));
}

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

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 0.5rem 0.8rem;
  background: rgba(7, 11, 20, 0.84);
  border-top: 1px solid var(--line);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  line-height: 1.55;
  color: var(--muted);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 4 / 5; }

.media-frame--overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(160deg, rgba(45, 125, 255, 0.24), transparent 46%, rgba(255, 138, 61, 0.2)),
    repeating-linear-gradient(0deg, rgba(7, 11, 20, 0.16) 0 1px, transparent 1px 4px);
}

/* ---------- 11. 显现动画协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 0.6rem 1rem;
  background: var(--paper);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.85rem;
  transform: translateY(-220%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---------- 13. 头部：移动端顶栏 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-header);
  width: 100%;
  height: var(--topbar);
  background: rgba(7, 11, 20, 0.95);
  border-bottom: 1px solid var(--line-strong);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.rail {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  height: 100%;
  padding-inline: 16px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid var(--gold);
  background: linear-gradient(140deg, rgba(232, 180, 74, 0.18), transparent 70%);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand__name {
  color: var(--paper);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.brand__line {
  color: var(--muted);
  font-family: var(--font-serif);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
}

.brand:hover .brand__mark { border-color: var(--amber); color: var(--amber); }
.brand:hover .brand__name { color: var(--gold); }

/* 菜单按钮 */
.nav-toggle {
  position: relative;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line-strong);
  color: var(--paper);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  border-color: var(--amber);
  color: var(--amber);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-toggle__text { line-height: 1; }

/* 导航抽屉（移动端） */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.5rem;
  width: min(320px, 86vw);
  height: 100vh;
  height: 100dvh;
  padding: calc(var(--topbar) + 1.2rem) 1.15rem 1.6rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  visibility: hidden;
  transform: translateX(-102%);
  background: var(--panel);
  border-right: 1px solid var(--line-strong);
  box-shadow: 24px 0 60px rgba(0, 0, 0, 0.55);
  transition: transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.site-header[data-open="true"] .nav {
  visibility: visible;
  transform: translateX(0);
}

.nav__list {
  display: flex;
  flex-direction: column;
}

.nav__item + .nav__item { border-top: 1px solid var(--line); }

.nav__link {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.85rem 0.2rem;
  color: var(--paper);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.nav__link:hover {
  color: var(--amber);
  padding-left: 0.55rem;
}

.nav__idx {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.nav__link[aria-current="page"] { color: var(--gold); }

.nav__link[aria-current="page"] .nav__idx { color: var(--amber); }

.nav__link[aria-current="page"]::after {
  content: "";
  align-self: center;
  margin-left: auto;
  width: 20px;
  height: 1px;
  background: var(--amber);
}

.nav__aside {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.rail__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--amber);
  background: linear-gradient(120deg, rgba(255, 138, 61, 0.16), transparent 72%);
  color: var(--amber);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.rail__cta:hover { background: var(--amber); color: #140803; }

.rail__note {
  max-width: 32ch;
  color: var(--muted);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  line-height: 1.75;
  letter-spacing: 0.03em;
}

/* 遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  background: rgba(4, 7, 12, 0.78);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.site-header[data-open="true"] .nav-scrim {
  opacity: 1;
  visibility: visible;
}

/* 阅读进度尺（移动端：顶栏下沿横线） */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  z-index: 80;
  pointer-events: none;
  background: rgba(138, 155, 184, 0.16);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--amber), var(--gold) 55%, var(--blue));
  transform-origin: left center;
  transform: scaleX(var(--p, 0));
}

@media (max-width: 1023px) {
  html.nav-open { overflow: hidden; }
}

/* ---------- 14. 头部：桌面端侧边轨道 ---------- */
@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--rail);
  }

  #main-content { scroll-margin-top: 1.5rem; }

  .site-header {
    width: var(--rail);
    height: 100vh;
    border-bottom: 0;
    border-right: 1px solid var(--line-strong);
    background: linear-gradient(180deg, #080D18 0%, #070B14 52%, #0A1120 100%);
  }

  .rail {
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    padding: 26px 0 22px;
    overflow-y: auto;
    scrollbar-width: none;
  }

  .rail::-webkit-scrollbar { width: 0; height: 0; }

  .nav-toggle { display: none; }

  .brand {
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
  }

  .brand__mark {
    width: 46px;
    height: 46px;
    font-size: 0.9rem;
  }

  .brand__text {
    flex-direction: row;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .brand__name {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 1rem;
    letter-spacing: 0.3em;
  }

  .brand__line {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 0.62rem;
    letter-spacing: 0.24em;
  }

  .nav {
    position: static;
    transform: none;
    visibility: visible;
    width: 100%;
    height: auto;
    flex: 1;
    align-items: center;
    gap: 0;
    padding: 1.8rem 0 0;
    overflow: visible;
    background: transparent;
    border-right: 0;
    box-shadow: none;
  }

  .nav__list {
    width: 100%;
    gap: 2px;
  }

  .nav__item + .nav__item { border-top: 0; }

  .nav__link {
    position: relative;
    flex-direction: column;
    align-items: center;
    gap: 0.18rem;
    width: 100%;
    padding: 0.55rem 0;
    font-size: 0.78rem;
    letter-spacing: 0.08em;
  }

  .nav__link:hover { padding-left: 0; }

  .nav__idx {
    display: block;
    font-size: 0.58rem;
    letter-spacing: 0.1em;
  }

  .nav__link[aria-current="page"]::after { display: none; }

  .nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 18px;
    transform: translateY(-50%);
    background: var(--amber);
  }

  .nav__aside {
    width: 100%;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem 0 0;
  }

  .rail__cta {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    padding: 1rem 0.45rem;
    font-size: 0.74rem;
    letter-spacing: 0.24em;
    border-color: rgba(255, 138, 61, 0.55);
  }

  .rail__note { display: none; }

  .nav-scrim { display: none; }

  .scroll-progress {
    top: 0;
    right: 0;
    bottom: auto;
    left: auto;
    width: 2px;
    height: 100%;
  }

  .scroll-progress__bar {
    transform-origin: top center;
    transform: scaleY(var(--p, 0));
    background: linear-gradient(180deg, var(--amber), var(--gold) 48%, var(--blue));
  }
}

@media (min-width: 1024px) and (min-height: 900px) {
  .rail__note {
    display: block;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    max-width: none;
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    color: var(--muted);
  }
}

/* ---------- 15. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  overflow: hidden;
  border-top: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(14, 22, 38, 0) 0%, #0B1220 38%, #070B14 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--amber) 42%, var(--gold) 64%, transparent 100%);
}

.footer__grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.1rem;
  padding-block: clamp(2.4rem, 5vw, 4rem) clamp(1.8rem, 3vw, 2.6rem);
}

.footer__brand { min-width: 0; }

.footer__mark {
  display: inline-block;
  color: var(--paper);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.1;
  transition: color var(--dur) var(--ease);
}

.footer__mark:hover { color: var(--gold); }

.footer__tagline {
  margin-top: 0.75rem;
  max-width: 22ch;
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.75;
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.9rem;
  margin-top: 1.1rem;
  color: var(--muted);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
}

.footer__col-title {
  margin-bottom: 1rem;
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  line-height: 1.4;
  text-transform: uppercase;
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer__link {
  display: inline-block;
  color: var(--muted);
  font-size: 0.92rem;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.footer__link:hover {
  color: var(--amber);
  transform: translateX(4px);
}

.footer__contact { min-width: 0; }

.footer__contact-list {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer__contact-row {
  display: grid;
  grid-template-columns: 3.4rem 1fr;
  gap: 0.6rem;
  align-items: baseline;
}

.footer__contact-row dt {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
}

.footer__contact-row dd {
  color: var(--paper);
  font-size: 0.9rem;
  line-height: 1.65;
  word-break: break-word;
}

.footer__note {
  margin-top: 1rem;
  max-width: 36ch;
  color: var(--muted);
  font-family: var(--font-serif);
  font-size: 0.72rem;
  line-height: 1.75;
}

.footer__bottom {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem 1.6rem;
  padding-block: 1.2rem 1.6rem;
  border-top: 1px solid var(--line);
  background: rgba(7, 11, 20, 0.72);
}

.footer__copy {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.1rem;
}

.footer__legal-link {
  color: var(--muted);
  font-size: 0.78rem;
  transition: color var(--dur) var(--ease);
}

.footer__legal-link:hover { color: var(--amber); }

.footer__icp {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
}

.footer__wordmark {
  position: absolute;
  left: 50%;
  bottom: -0.16em;
  z-index: 0;
  transform: translateX(-50%);
  color: rgba(138, 155, 184, 0.05);
  -webkit-text-stroke: 1px rgba(138, 155, 184, 0.1);
  font-size: clamp(4rem, 17vw, 13rem);
  font-weight: 900;
  line-height: 0.8;
  letter-spacing: 0.06em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
}

/* ---------- 16. 页脚响应式 ---------- */
@media (min-width: 600px) {
  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.2rem 1.8rem;
  }
}

@media (min-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

  .footer__grid {
    grid-template-columns: 1.5fr 0.8fr 0.8fr 1.35fr;
    gap: 2.5rem;
  }

  .footer__brand { grid-column: 1; }
}

@media (min-width: 1280px) {
  body { font-size: 1.0625rem; }
}

/* ---------- 17. 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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .btn:hover,
  .footer__link:hover { transform: none; }
}