/* ============================================================
   易贝体育赛事 · 共享样式 /assets/site.css
   夜蓝赛场 + 荧光青 / 橙红脉冲 · 展览画册式编号体系
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; cursor: pointer; font: inherit; color: inherit; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }
[ id ] { scroll-margin-top: 104px; }

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

/* ---------- 2. 变量 ---------- */
:root {
  /* 品牌色板 */
  --ink: #0A1026;
  --ink-2: #141B42;
  --cyan: #2FF2D4;
  --pulse: #FF5B36;
  --teal: #0E4C55;
  --wine: #5A1B33;
  --violet: #38276E;
  --paper: #F3EFE4;
  --white: #FFFFFF;
  --slate: #8E97B5;

  /* 语义色 */
  --text: #E4E8F5;
  --text-dim: #A9B2CC;
  --on-paper: #161B33;
  --line: rgba(142, 151, 181, .26);
  --line-2: rgba(142, 151, 181, .13);

  /* 字体 */
  --font-display: "Arial Narrow", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-num: ui-monospace, SFMono-Regular, Menlo, Consolas, "PingFang SC", "Microsoft YaHei", monospace;

  /* 度量 */
  --wrap: 1280px;
  --pad: 72px;
  --header-h: 76px;
  --ease: cubic-bezier(.2, .6, .35, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
}

p { max-width: 38em; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 800; line-height: 1.05; letter-spacing: -.015em; color: var(--white); }

.t-display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(48px, 7.2vw, 96px);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--white);
}

.t-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}

.t-sub {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 2.4vw, 34px);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--white);
}

.num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: .01em;
}

.label {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1.4;
  color: var(--slate);
}
.label--cyan { color: var(--cyan); }
.label--pulse { color: var(--pulse); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 300;
  padding: 11px 18px;
  background: var(--cyan);
  color: var(--ink);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .06em;
  transition: top .16s var(--ease);
}
.skip-link:focus { top: 16px; }

/* ---------- 4. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}
.wrap--narrow { max-width: 920px; }

.site-main { display: block; padding-top: var(--header-h); }
.site-main--overlay { padding-top: 0; }

.section { padding: 96px 0; }
.section--tight { padding: 64px 0; }

.section--paper {
  background: var(--paper);
  color: var(--on-paper);
  border-top: 1px solid rgba(22, 27, 51, .16);
  border-bottom: 1px solid rgba(22, 27, 51, .16);
}
.section--paper .section-head__title,
.section--paper .t-title,
.section--paper .t-sub,
.section--paper .t-display,
.section--paper h2,
.section--paper h3 { color: var(--on-paper); }
.section--paper .section-head__lead,
.section--paper .label { color: #4A5372; }
.section--paper .section-head { border-bottom-color: rgba(22, 27, 51, .2); }
.section--paper .rule { background: rgba(22, 27, 51, .2); }
.section--paper p { color: #2A3150; }
.section--paper .card { background: #FFFFFF; border-color: rgba(22, 27, 51, .18); }
.section--paper .card__title { color: var(--on-paper); }

.section--teal { background: linear-gradient(180deg, #0E4C55, #0A3B43); border-top: 1px solid rgba(47, 242, 212, .18); }
.section--wine { background: linear-gradient(180deg, #5A1B33, #43142A); border-top: 1px solid rgba(255, 91, 54, .2); }
.section--violet { background: linear-gradient(180deg, #38276E, #2A1D55); border-top: 1px solid rgba(142, 151, 181, .24); }

.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--split-62 { grid-template-columns: minmax(0, 62fr) minmax(0, 38fr); }
.grid--split-70 { grid-template-columns: minmax(0, 70fr) minmax(0, 30fr); }
.grid--split-38 { grid-template-columns: minmax(0, 38fr) minmax(0, 62fr); }

.lift-1 { margin-top: 12px; }
.lift-2 { margin-top: 22px; }

.rule { height: 1px; background: var(--line); border: 0; }
.rule--accent {
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0 28%, var(--pulse) 28% 46%, transparent 46% 100%);
}

/* ---------- 5. 章节抬头 ---------- */
.section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-bottom: 24px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--line);
}
.section-head__index {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--cyan);
}
.section-head__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(28px, 3.6vw, 48px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--white);
}
.section-head__lead { max-width: 62ch; font-size: 15px; color: var(--text-dim); }

/* ---------- 6. 章节编号 ---------- */
.chapter { position: relative; }
.chapter__num {
  display: block;
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 72px);
  line-height: .9;
  letter-spacing: -.03em;
  color: var(--slate);
  transition: color .2s var(--ease);
}
.chapter.is-current .chapter__num { color: var(--white); }
.chapter__title { margin-top: 10px; font-size: 18px; font-weight: 800; color: var(--white); }

/* ---------- 7. 按钮 / 胶囊 / 筛选 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
  transition: background-color .18s var(--ease), border-color .18s var(--ease),
              color .18s var(--ease), box-shadow .18s var(--ease);
}
.btn:hover { border-color: rgba(47, 242, 212, .6); color: var(--cyan); }
.btn:disabled,
.btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; }

.btn--pulse { background: var(--pulse); border-color: var(--pulse); color: #180A06; }
.btn--pulse:hover { background: #FF7350; border-color: #FF7350; color: #180A06; }

.btn--cyan { background: var(--cyan); border-color: var(--cyan); color: var(--ink); }
.btn--cyan:hover { background: #66F7E2; border-color: #66F7E2; color: var(--ink); }

.btn--ghost { background: transparent; border-color: rgba(243, 239, 228, .32); color: var(--white); }
.btn--ghost:hover { background: rgba(47, 242, 212, .1); border-color: var(--cyan); color: var(--cyan); }

.btn--paper { background: var(--paper); border-color: var(--paper); color: var(--ink); }
.btn--paper:hover { background: #FFFFFF; border-color: var(--cyan); color: var(--ink); }

.btn--block { width: 100%; }

.chip-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: none;
}
.chip-row::-webkit-scrollbar { display: none; }

.chip {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: var(--ink-2);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  white-space: nowrap;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.chip:hover { border-color: var(--cyan); color: var(--cyan); }
.chip.is-active,
.chip[aria-selected="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 800;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.filter-bar__btn {
  padding: 8px 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.filter-bar__btn:hover { border-color: var(--cyan); color: var(--cyan); }
.filter-bar__btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink);
  font-weight: 800;
}

/* ---------- 8. 卡片 / 纸面 / 面板 / 标签 ---------- */
.card {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 24px;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease);
}
.card::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 3px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .18s var(--ease);
}
.card:hover {
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 1px var(--cyan);
}
.card:hover::after { transform: scaleX(1); }

.card--notch::before {
  content: "";
  position: absolute;
  top: -1px; right: -1px;
  width: 20px; height: 20px;
  background: var(--ink);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  pointer-events: none;
}

.card__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.card__title { font-family: var(--font-display); font-weight: 800; font-size: 20px; line-height: 1.2; color: var(--white); }
.card__meta { font-family: var(--font-num); font-size: 11px; letter-spacing: .12em; color: var(--slate); }
.card__body { font-size: 15px; color: var(--text-dim); }
.card__body p { color: inherit; }
.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line-2);
  font-size: 12px;
  color: var(--slate);
}

.paper {
  position: relative;
  background: var(--paper);
  color: var(--on-paper);
  border: 1px solid var(--on-paper);
  padding: 28px;
  box-shadow: 6px 6px 0 rgba(47, 242, 212, .22);
}
.paper h2, .paper h3 { color: var(--on-paper); }
.paper p { color: #2A3150; }

.panel {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 24px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  line-height: 1.5;
  color: var(--cyan);
  background: rgba(47, 242, 212, .1);
  border: 1px solid rgba(47, 242, 212, .45);
}
.tag--pulse { color: var(--pulse); background: rgba(255, 91, 54, .12); border-color: rgba(255, 91, 54, .5); }
.tag--teal { color: #7FE4E0; background: rgba(14, 76, 85, .55); border-color: rgba(127, 228, 224, .4); }
.tag--wine { color: #F2A9BC; background: rgba(90, 27, 51, .6); border-color: rgba(242, 169, 188, .38); }
.tag--violet { color: #C3B4FF; background: rgba(56, 39, 110, .6); border-color: rgba(195, 180, 255, .38); }
.tag--paper { color: var(--on-paper); background: var(--paper); border-color: var(--on-paper); }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 5vw, 64px);
  line-height: .92;
  letter-spacing: -.02em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.stat__num--pulse { color: var(--pulse); }
.stat__label { font-size: 11px; font-weight: 700; letter-spacing: .14em; color: var(--slate); }

/* ---------- 9. 表格 ---------- */
.table-wrap {
  overflow-x: auto;
  background: var(--ink-2);
  border: 1px solid var(--line);
}
.data-table { min-width: 560px; font-size: 14px; }
.data-table th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--ink-2);
  padding: 12px 16px;
  text-align: left;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--slate);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.data-table td {
  padding: 13px 16px;
  color: var(--text);
  border-bottom: 1px solid var(--line-2);
  white-space: nowrap;
}
.data-table tbody tr { transition: background-color .16s var(--ease); }
.data-table tbody tr:hover { background: rgba(47, 242, 212, .06); }
.data-table .is-key { color: var(--pulse); font-family: var(--font-num); font-variant-numeric: tabular-nums; }

/* ---------- 10. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line);
}
.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--ink-2) 0%, var(--teal) 58%, var(--violet) 100%);
  opacity: .85;
}
.media img,
.media video {
  position: relative;
  z-index: 1;
  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--3x4 { aspect-ratio: 3 / 4; }
.media--wide { aspect-ratio: 21 / 9; }
.media--cut { clip-path: polygon(0 0, 100% 0, 100% 88%, 92% 100%, 0 100%); border: 0; }
.media__tag { position: absolute; top: 12px; left: 12px; z-index: 2; }
.media__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 2;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--on-paper);
  font-size: 12px;
  letter-spacing: .04em;
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb { margin-bottom: 26px; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: rgba(142, 151, 181, .55); }
.breadcrumb__link {
  color: var(--text-dim);
  padding-bottom: 1px;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.breadcrumb__link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumb__item[aria-current="page"] { color: var(--white); }

/* ---------- 12. 显现 ---------- */
[data-reveal] { opacity: 0; transition: opacity .22s var(--ease); }
[data-reveal].is-in { opacity: 1; }

/* ============================================================
   13. 站点头部
   ============================================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(10, 16, 38, .9), rgba(10, 16, 38, 0));
  opacity: 1;
  transition: opacity .2s var(--ease);
  pointer-events: none;
}
.site-header[data-scrolled="true"] {
  background: var(--ink);
  border-bottom-color: var(--line);
}
.site-header[data-scrolled="true"]::before { opacity: 0; }

.site-header__bar {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: var(--wrap);
  min-height: var(--header-h);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand__mark {
  width: 26px; height: 26px;
  background: linear-gradient(140deg, var(--cyan) 0 55%, var(--pulse) 55% 100%);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
}
.brand__text { display: flex; flex-direction: column; gap: 2px; }
.brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .05em;
  line-height: 1.1;
  color: var(--white);
  white-space: nowrap;
}
.brand__tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .16em;
  line-height: 1.2;
  color: var(--cyan);
  white-space: nowrap;
}

.nav { flex: 1 1 auto; min-width: 0; }
.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav__list::-webkit-scrollbar { display: none; }
.nav__item { flex: 0 0 auto; }
.nav__link {
  display: inline-block;
  padding: 9px 14px;
  border: 1px solid transparent;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text-dim);
  white-space: nowrap;
  transition: color .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}
.nav__link:hover {
  color: var(--white);
  border-color: rgba(47, 242, 212, .45);
  background: rgba(47, 242, 212, .08);
}
.nav__link[aria-current="page"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 800;
}

.site-header__actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; margin-left: auto; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  border: 1px solid rgba(243, 239, 228, .28);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars {
  position: relative;
  display: inline-block;
  width: 16px; height: 2px;
  background: var(--cyan);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px; height: 2px;
  background: var(--cyan);
  transition: transform .18s var(--ease), opacity .18s var(--ease);
}
.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle__label { line-height: 1; }

.scroll-progress {
  position: absolute;
  left: 0; bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--pulse));
  transition: width .12s linear;
}

/* ============================================================
   14. 站点页脚
   ============================================================ */
.site-footer {
  position: relative;
  background: var(--ink);
  border-top: 1px solid var(--line);
  color: var(--text);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg,
    var(--cyan) 0 18%,
    var(--pulse) 18% 30%,
    var(--teal) 30% 52%,
    var(--wine) 52% 68%,
    var(--violet) 68% 100%);
  opacity: .9;
}

.site-footer__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 68px var(--pad) 28px;
}

.site-footer__lead {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px 40px;
  align-items: end;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.brand--footer .brand__name { font-size: 20px; }
.site-footer__note {
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
  justify-self: end;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 40px;
  padding: 48px 0;
}
.footer-group__title {
  margin-bottom: 16px;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--cyan);
}
.footer-group__list { display: flex; flex-direction: column; gap: 10px; }
.footer-group__list--plain { gap: 12px; }

.footer-link {
  display: inline-block;
  font-size: 14px;
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.footer-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-contact { display: flex; flex-direction: column; gap: 2px; }
.footer-contact__key { font-size: 10px; font-weight: 700; letter-spacing: .16em; color: var(--slate); }
.footer-contact__val { font-size: 14px; color: var(--text); word-break: break-word; }
.footer-note { font-size: 12px; line-height: 1.7; color: var(--slate); max-width: 34ch; }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
}
.site-footer__copy { max-width: none; }
.site-footer__icp { font-family: var(--font-num); max-width: none; }

/* ============================================================
   15. 响应式
   ============================================================ */
@media (max-width: 1099px) {
  .site-header__bar { gap: 14px; padding-inline: 32px; }

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

  .nav {
    position: fixed;
    left: 14px;
    right: 14px;
    bottom: 14px;
    z-index: 210;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    padding: 14px 14px 92px;
    background: var(--ink-2);
    border: 1px solid rgba(47, 242, 212, .3);
    box-shadow: 0 24px 60px rgba(4, 8, 20, .62);
    opacity: 0;
    visibility: hidden;
    transform: translateY(calc(100% + 28px));
    transition: transform .22s var(--ease), opacity .22s var(--ease), visibility .22s var(--ease);
  }
  .nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    overflow: visible;
  }
  .nav__item { flex: none; }
  .nav__link {
    display: block;
    padding: 13px 14px;
    font-size: 14px;
    border-color: var(--line);
    background: rgba(255, 255, 255, .02);
  }
  .header-search { display: none; }
  .header-cta {
    position: fixed;
    right: 14px;
    bottom: 14px;
    z-index: 220;
    padding: 14px 20px;
    box-shadow: 0 14px 32px rgba(255, 91, 54, .32);
  }

  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--split-62, .grid--split-70, .grid--split-38 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 860px) {
  :root { --pad: 32px; }

  body { font-size: 16px; }
  .section { padding: 68px 0; }
  .section--tight { padding: 48px 0; }

  .site-footer__lead { grid-template-columns: minmax(0, 1fr); }
  .site-footer__note { justify-self: start; }
  .site-footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; }
  .site-footer__inner { padding-top: 52px; }
  .lift-1, .lift-2 { margin-top: 0; }
}

@media (max-width: 719px) {
  :root { --pad: 20px; --header-h: 64px; }

  .site-header__bar { padding-inline: 20px; gap: 10px; }
  .brand__name { font-size: 15px; }
  .brand__tag { font-size: 9px; }
  .nav-toggle { padding: 9px 12px; }
  .nav-toggle__label { display: none; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .grid { gap: 18px; }

  .section-head { margin-bottom: 32px; }
  .card { padding: 20px; }
  .paper { padding: 22px; box-shadow: 4px 4px 0 rgba(47, 242, 212, .22); }

  .site-footer__grid { grid-template-columns: minmax(0, 1fr); gap: 30px; padding: 36px 0; }
  .site-footer__bottom { flex-direction: column; align-items: flex-start; }

  .data-table { min-width: 480px; }
}

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; }
  .scroll-progress { transition: none; }
}