/* ==========================================================================
   云开看台 · 共享样式表  /assets/site.css
   夜场球场：深墨绿底 · 看台混凝土灰 · 信号橙 + 荧光青
   ========================================================================== */

/* ---------- 01 Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

ul, ol { list-style: none; }

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

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

table { border-collapse: collapse; border-spacing: 0; }

[hidden] { display: none !important; }

/* ---------- 02 Tokens ---------- */
:root {
  --ink-950: #071613;
  --concrete-900: #1B211F;
  --channel-800: #12352A;
  --turf-700: #14503C;
  --concrete-500: #6E7671;
  --concrete-200: #C9CFC9;
  --paint-050: #F2F5F1;
  --signal-500: #FF6A1A;
  --signal-600: #E2560C;
  --neon-400: #2FE8C6;
  --amber-400: #FFC24B;

  --line-soft: rgba(201, 207, 201, .14);
  --line-strong: rgba(201, 207, 201, .30);
  --glow-cyan: rgba(47, 232, 198, .14);
  --glow-orange: rgba(255, 106, 26, .16);

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: var(--font-display);
  --font-data: ui-monospace, "JetBrains Mono", "SFMono-Regular", "Noto Sans Mono CJK SC", Menlo, Consolas, monospace;

  --header-pad: 18px;
  --capsule-h: 66px;
  --gutter: clamp(18px, 4vw, 40px);
  --maxw: 1280px;
  --rail: 72px;
  --aside: 96px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 03 Base typography ---------- */
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--concrete-200);
  background-color: var(--ink-950);
  background-image:
    radial-gradient(1100px 520px at 12% -8%, rgba(20, 80, 60, .38), transparent 70%),
    radial-gradient(900px 460px at 96% 4%, rgba(47, 232, 198, .07), transparent 68%);
  background-repeat: no-repeat;
  padding-top: calc(var(--header-pad) * 2 + var(--capsule-h));
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.14;
  color: var(--paint-050);
}

h1 { font-size: clamp(2.4rem, 6.2vw, 4.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p + p { margin-top: 1em; }

strong { font-weight: 700; color: var(--paint-050); }

::selection { background: var(--signal-500); color: var(--ink-950); }

:focus-visible {
  outline: 2px solid var(--neon-400);
  outline-offset: 3px;
  border-radius: 6px;
}

.display-1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 9vw, 7.2rem);
  line-height: .98;
  letter-spacing: -.03em;
  color: var(--paint-050);
}

.display-2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 5.4vw, 4rem);
  line-height: 1.06;
  letter-spacing: -.025em;
  color: var(--paint-050);
}

.display-3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  line-height: 1.2;
  color: var(--paint-050);
}

.lead {
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  line-height: 1.8;
  color: var(--concrete-200);
  max-width: 34em;
}

.prose { max-width: 34em; }
.prose h2 { margin-bottom: .5em; }
.prose h3 { margin: 1.4em 0 .4em; }
.prose ul { margin: 1em 0; }
.prose li { position: relative; padding-left: 1.4em; margin-top: .45em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 10px;
  height: 2px;
  background: var(--signal-500);
}

.annot {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--concrete-500);
  text-transform: none;
}

.annot--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .24em;
}

/* ---------- 04 Layout ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--wide { max-width: 1520px; }

.section { padding-block: clamp(48px, 7vw, 104px); }

.section--light {
  background: var(--paint-050);
  color: var(--concrete-900);
}

.section--light h1,
.section--light h2,
.section--light h3,
.section--light .display-1,
.section--light .display-2,
.section--light .display-3 { color: var(--ink-950); }

.section--light .lead { color: #2c3532; }
.section--light .annot { color: #5d6660; }
.section--light a { color: #0d4a37; border-bottom: 1px solid rgba(13, 74, 55, .35); }
.section--light a:hover { color: var(--signal-600); border-bottom-color: var(--signal-600); }

.shell {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: clamp(16px, 2vw, 32px);
  width: 100%;
  max-width: 1520px;
  margin-inline: auto;
  padding-inline: clamp(14px, 2.4vw, 28px);
}

.shell__rail { position: relative; }
.shell__main { min-width: 0; }
.shell__aside { display: none; min-width: 0; }

@media (min-width: 1200px) {
  .shell { grid-template-columns: var(--rail) minmax(0, 1fr) var(--aside); }
  .shell__aside { display: block; }
}

.rail-index {
  position: sticky;
  top: calc(var(--header-pad) * 2 + var(--capsule-h) + 18px);
  display: grid;
  gap: 18px;
  padding-block: 8px;
}

.rail-index__item {
  display: grid;
  gap: 6px;
  color: var(--concrete-500);
  transition: color .2s var(--ease);
}

.rail-index__num {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .2em;
}

.rail-index__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--concrete-500);
  transition: width .25s var(--ease), background-color .25s var(--ease);
}

.rail-index__item:hover,
.rail-index__item:focus-visible,
.rail-index__item.is-current { color: var(--neon-400); }

.rail-index__item:hover .rail-index__bar,
.rail-index__item:focus-visible .rail-index__bar,
.rail-index__item.is-current .rail-index__bar {
  width: 40px;
  background: var(--neon-400);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 28px);
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }
.col-main { grid-column: span 8; }
.col-aside { grid-column: span 4; }

@media (max-width: 900px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9,
  .col-main, .col-aside { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .shell { grid-template-columns: minmax(0, 1fr); }
  .shell__rail { display: none; }
}

/* ---------- 05 Chapter band ---------- */
.chapter { padding-block: clamp(30px, 4.6vw, 64px); }

.chapter__band {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 1.6vw, 24px);
  padding-block: 14px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, rgba(18, 53, 42, .75), rgba(18, 53, 42, 0) 72%);
}

.chapter__num {
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--signal-500);
}

.chapter__title {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 700;
  color: var(--paint-050);
  letter-spacing: .01em;
}

/* ---------- 06 Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .55em;
  padding: .72em 1.4em;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color .2s var(--ease), color .2s var(--ease),
              border-color .2s var(--ease), transform .2s var(--ease);
}

.btn--signal {
  background: var(--signal-500);
  color: var(--ink-950);
  box-shadow: 0 10px 26px -18px var(--signal-500);
}

.btn--signal:hover { background: #FF813F; transform: translateY(-1px); }
.btn--signal:active { background: var(--signal-600); transform: translateY(0); }

.btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--concrete-200);
}

.btn--ghost:hover {
  border-color: var(--neon-400);
  color: var(--neon-400);
  transform: translateY(-1px);
}

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

/* ---------- 07 Breadcrumbs ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--concrete-500);
  padding-block: 14px;
}

.crumbs__item { color: var(--concrete-500); }
.crumbs__item a { color: var(--concrete-200); }
.crumbs__item a:hover { color: var(--neon-400); }
.crumbs__item[aria-current="page"] { color: var(--signal-500); }
.crumbs__sep { color: var(--concrete-500); opacity: .6; }

/* ---------- 08 Panels ---------- */
.panel {
  position: relative;
  background: var(--concrete-900);
  border: 1px solid var(--line-soft);
  padding: clamp(20px, 2.6vw, 34px);
}

.panel-cut--tr {
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.panel-cut--bl {
  clip-path: polygon(0 0, 100% 0, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.panel:hover {
  border-color: rgba(47, 232, 198, .55);
  transform: translateY(-2px);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

/* ---------- 09 Data & stats ---------- */
.stat {
  display: grid;
  gap: 4px;
  padding-block: 10px;
  border-top: 1px solid var(--line-soft);
}

.stat__num {
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--signal-500);
  letter-spacing: -.01em;
}

.stat__label {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--concrete-500);
}

.data-bar {
  position: relative;
  height: 8px;
  background: rgba(110, 118, 113, .22);
  overflow: hidden;
}

.data-bar__fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--turf-700), var(--neon-400));
}

.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--line-soft);
}

.data-table {
  width: 100%;
  min-width: 560px;
  font-family: var(--font-data);
  font-size: 15px;
  color: var(--concrete-200);
}

.data-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--concrete-500);
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}

.data-table thead th {
  background: var(--channel-800);
  color: var(--paint-050);
  font-weight: 700;
  letter-spacing: .06em;
}

.data-table tbody tr:nth-child(odd) { background: rgba(18, 53, 42, .42); }
.data-table tbody tr:hover { background: rgba(47, 232, 198, .09); }

.data-table th:first-child,
.data-table td:first-child {
  position: sticky;
  left: 0;
  background: var(--concrete-900);
  z-index: 2;
}

.data-table thead th:first-child { background: var(--channel-800); }

/* ---------- 10 Tags & legend ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(145, 80, 60, .08);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--concrete-200);
  white-space: nowrap;
}

.tag--cyan { border-color: rgba(47, 232, 198, .5); color: var(--neon-400); }
.tag--amber { border-color: rgba(255, 194, 75, .55); color: var(--amber-400); }

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--concrete-500);
}

.legend__dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 8px;
  background: var(--neon-400);
  vertical-align: baseline;
}

/* ---------- 11 Media frames ---------- */
.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background-image:
    repeating-linear-gradient(90deg, rgba(20, 80, 60, .55) 0 30px, rgba(20, 80, 60, .22) 30px 60px),
    linear-gradient(180deg, var(--concrete-900), var(--ink-950));
}

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

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(7, 22, 19, 0), rgba(7, 22, 19, .88));
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--concrete-200);
}

/* ---------- 12 Reveal ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

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

/* ==========================================================================
   13 头部：悬浮胶囊导航
   ========================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  padding: var(--header-pad) clamp(12px, 3vw, 34px) 0;
  pointer-events: none;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 320;
  pointer-events: auto;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--signal-500);
  color: var(--ink-950);
  font-weight: 700;
  font-size: 15px;
  transform: translateY(-240%);
  transition: transform .2s var(--ease);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 310;
  background: rgba(201, 207, 201, .10);
  pointer-events: none;
}

.scroll-progress__fill {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--neon-400), var(--signal-500));
  transition: transform .12s linear;
}

.site-header__capsule {
  position: relative;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 22px);
  width: 100%;
  max-width: 1400px;
  min-height: var(--capsule-h);
  margin-inline: auto;
  padding: 9px 10px 9px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(12, 26, 22, .84);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  backdrop-filter: blur(14px) saturate(130%);
  box-shadow: 0 22px 48px -34px #000, inset 0 1px 0 rgba(201, 207, 201, .06);
  transition: min-height .24s var(--ease), background-color .24s var(--ease),
              border-color .24s var(--ease);
}

.site-header[data-collapsed="true"] .site-header__capsule {
  min-height: 52px;
  background: rgba(9, 20, 17, .95);
  border-color: rgba(47, 232, 198, .22);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  padding: 4px 8px 4px 2px;
  border-radius: 999px;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 9px;
  border: 1px solid rgba(47, 232, 198, .38);
  background: linear-gradient(150deg, var(--turf-700), var(--channel-800));
}

.brand__mark::before {
  content: "";
  width: 14px;
  height: 14px;
  border-left: 2px solid var(--signal-500);
  border-bottom: 2px solid var(--neon-400);
}

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

.brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: .06em;
  color: var(--paint-050);
}

.brand__season {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--concrete-500);
  margin-top: 2px;
}

/* 导航 */
.site-nav { margin-left: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: block;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--concrete-200);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}

.site-nav__link:hover {
  color: var(--neon-400);
  background: var(--glow-cyan);
}

.site-nav__link[aria-current="page"] {
  color: var(--paint-050);
  background: rgba(18, 53, 42, .92);
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 16px;
  height: 2px;
  margin-left: -8px;
  border-radius: 2px;
  background: var(--signal-500);
}

.header-cta { flex: 0 0 auto; margin-left: 4px; }

/* 移动端栏目按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-left: auto;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--concrete-200);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.nav-toggle:hover { border-color: var(--neon-400); color: var(--neon-400); }

.nav-toggle__text {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

/* 头部响应式 */
@media (max-width: 1180px) {
  .site-nav__link { padding: 9px 11px; font-size: 14px; }
  .brand__season { letter-spacing: .12em; }
}

@media (max-width: 1024px) {
  .brand__season { display: none; }
}

@media (max-width: 860px) {
  :root { --header-pad: 12px; --capsule-h: 58px; }

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

  .site-nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    margin-left: 0;
    padding: 12px;
    border-radius: 22px;
    border: 1px solid var(--line-soft);
    background: rgba(9, 20, 17, .97);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: 0 26px 50px -30px #000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s linear;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .site-nav__link {
    padding: 12px 14px;
    font-size: 16px;
    border-radius: 14px;
    border-left: 2px solid transparent;
  }

  .site-nav__link[aria-current="page"] {
    border-left-color: var(--signal-500);
  }

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

@media (max-width: 620px) {
  .site-header__capsule { padding: 8px 8px 8px 12px; gap: 8px; }
  .brand__name { font-size: 16px; letter-spacing: .04em; }
  .brand__mark { width: 28px; height: 28px; }
  .header-cta { padding: .6em 1em; font-size: 13px; }
  .nav-toggle__text { display: none; }
  .nav-toggle { padding: 9px 12px; }
}

/* ==========================================================================
   14 页脚
   ========================================================================== */
.site-footer {
  margin-top: clamp(56px, 9vw, 132px);
  background: var(--ink-950);
  border-top: 1px solid var(--line-soft);
}

.footer-band {
  position: relative;
  border-bottom: 1px solid rgba(47, 232, 198, .18);
  background:
    linear-gradient(100deg, var(--channel-800) 0%, var(--concrete-900) 62%, var(--ink-950) 100%);
}

.footer-band::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: clamp(80px, 22vw, 320px);
  height: 3px;
  background: linear-gradient(90deg, rgba(255, 106, 26, 0), var(--signal-500));
}

.footer-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 26px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--gutter);
}

.footer-band__label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--amber-400);
}

.footer-band__text {
  flex: 1 1 260px;
  font-size: 15px;
  color: var(--concrete-200);
}

.footer-band__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 1.15fr 1.4fr 1.1fr;
  gap: clamp(24px, 3.2vw, 52px);
  padding-block: clamp(40px, 5vw, 72px);
}

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

.footer-seg__title {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--concrete-500);
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.footer-list li + li { margin-top: 10px; }

.footer-list a {
  display: inline-block;
  font-size: 15px;
  color: var(--concrete-200);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer-list a:hover {
  color: var(--neon-400);
  border-bottom-color: var(--neon-400);
}

.footer-list--plain li {
  font-size: 14px;
  color: var(--concrete-500);
  line-height: 1.7;
  word-break: break-word;
}

.footer-contact { display: grid; gap: 14px; }

.footer-contact__row {
  display: grid;
  gap: 3px;
}

.footer-contact__key {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--concrete-500);
}

.footer-contact__val {
  margin: 0;
  font-size: 15px;
  color: var(--concrete-200);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px 34px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--concrete-500);
}

.footer-bottom__copy { color: var(--concrete-200); }

.footer-bottom__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.footer-bottom__links a { color: var(--concrete-500); }

.footer-bottom__links a:hover {
  color: var(--neon-400);
  border-bottom: 1px solid var(--neon-400);
}

.footer-bottom__sep { opacity: .5; }

.footer-bottom__icp { letter-spacing: .08em; }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-band__inner { flex-direction: column; gap: 12px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 15 无障碍与动效偏好 ---------- */
@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;
  }

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

  .scroll-progress__fill { transition: none !important; }
}

#main-content { scroll-margin-top: calc(var(--header-pad) * 2 + var(--capsule-h) + 16px); }