/* ============================================================
   大嬴体育 · 共享样式表 /assets/site.css
   暗场计分台：侧轨导航 + 网格底色 + 直角组件
   ============================================================ */

/* ---------- 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, figure, blockquote, ol, ul, dl, dd { margin: 0; }

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

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

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

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

:where(h1, h2, h3, h4) {
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.01em;
}

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩体系 */
  --ink: #07111F;
  --ink-deep: #050C15;
  --ink-soft: #0B1926;
  --char: #10151C;
  --stone: #3A434D;
  --bone: #F2EFE7;
  --orange: #FF5A1F;
  --teal: #19E3B1;
  --gold: #D8A84E;
  --moss: #5E7A5A;
  --clay: #A65B45;
  --mist: #8FA3B8;

  --line: rgba(143, 163, 184, 0.20);
  --line-2: rgba(143, 163, 184, 0.36);
  --body-text: #C6D0DA;

  /* 字体 */
  --font-display: "Noto Sans SC", "Source Han Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-display: clamp(2.6rem, 7vw, 5.2rem);
  --fs-h1: clamp(1.9rem, 4.2vw, 3rem);
  --fs-h2: clamp(1.45rem, 2.6vw, 2.05rem);
  --fs-h3: clamp(1.08rem, 1.7vw, 1.3rem);
  --fs-label: 0.72rem;

  /* 尺度 */
  --rail-w: 272px;
  --maxw: 1180px;
  --gutter: clamp(18px, 4.4vw, 64px);
  --section-y: clamp(48px, 7vw, 96px);

  /* 动效 */
  --dur: 0.34s;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --progress: 0;
}

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.72;
  color: var(--bone);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(143, 163, 184, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 184, 0.045) 1px, transparent 1px);
  background-size: 64px 64px, 64px 64px;
  background-position: center top;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--orange);
  color: #0A0F14;
}

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

/* ---------- 4. Layout utilities ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: 820px; }

.section {
  position: relative;
  padding-block: var(--section-y);
}

.section--tight { padding-block: clamp(28px, 4vw, 52px); }

.grid {
  display: grid;
  gap: clamp(14px, 1.8vw, 26px);
  grid-template-columns: repeat(var(--cols, 1), minmax(0, 1fr));
}

@media (min-width: 640px) {
  .grid {
    grid-template-columns: repeat(var(--cols-md, var(--cols, 1)), minmax(0, 1fr));
  }
}

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

.divider {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(24px, 3vw, 44px);
}

/* ---------- 5. Typography helpers ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--teal);
}

.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 34px;
  height: 1px;
  background: currentColor;
}

.eyebrow--gold { color: var(--gold); }

.display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-display);
  line-height: 0.98;
  letter-spacing: -0.02em;
}

.h2 {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  letter-spacing: -0.005em;
}

.h3 {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.lede {
  max-width: 60ch;
  font-size: clamp(1rem, 1.35vw, 1.14rem);
  line-height: 1.75;
  color: var(--body-text);
}

.prose {
  max-width: 70ch;
  color: var(--body-text);
}

.prose p + p { margin-top: 1.1em; }

.prose h2 {
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-size: var(--fs-h2);
  font-weight: 800;
  color: var(--bone);
}

.prose h3 {
  margin-top: 1.6em;
  margin-bottom: 0.4em;
  font-size: var(--fs-h3);
  font-weight: 800;
  color: var(--bone);
}

.prose li {
  position: relative;
  padding-left: 1.2em;
  margin-top: 0.35em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 7px;
  height: 1px;
  background: var(--orange);
}

.prose a {
  color: var(--teal);
  border-bottom: 1px solid rgba(25, 227, 177, 0.42);
}

.prose a:hover { border-bottom-color: var(--teal); }

/* ---------- 6. Buttons ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--bone);
  --btn-bd: var(--line-2);
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border: 1px solid var(--btn-bd);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-align: left;
  transition:
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--primary {
  --btn-bg: var(--orange);
  --btn-fg: #0A0F14;
  --btn-bd: var(--orange);
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: none;
}

.btn--primary:hover {
  --btn-bg: #FF7A47;
  --btn-bd: #FF7A47;
}

.btn--ghost { --btn-bd: var(--line-2); --btn-fg: var(--bone); }

.btn--ghost:hover {
  --btn-bd: var(--bone);
  --btn-bg: rgba(242, 239, 231, 0.07);
}

.btn--quiet {
  --btn-bd: transparent;
  --btn-fg: var(--teal);
  padding-inline: 0;
}

.btn--quiet:hover { --btn-fg: var(--bone); }

.btn__arrow {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1;
}

/* ---------- 7. Tags ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--line-2);
  background: rgba(7, 17, 31, 0.6);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.tag--teal {
  color: var(--teal);
  border-color: rgba(25, 227, 177, 0.45);
  background: rgba(25, 227, 177, 0.08);
}

.tag--gold {
  color: var(--gold);
  border-color: rgba(216, 168, 78, 0.5);
  background: rgba(216, 168, 78, 0.09);
}

.tag--clay {
  color: #E3866B;
  border-color: rgba(166, 91, 69, 0.62);
  background: rgba(166, 91, 69, 0.16);
}

/* ---------- 8. Breadcrumb ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.breadcrumb__sep { color: var(--stone); }

.breadcrumb__link {
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.breadcrumb__link:hover {
  color: var(--teal);
  border-bottom-color: var(--teal);
}

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

/* ---------- 9. Panels / metrics / index list ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 21, 28, 0.96), rgba(11, 25, 38, 0.96));
}

.panel__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.panel__title {
  font-size: var(--fs-h3);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.panel__body {
  color: var(--body-text);
  font-size: 0.95rem;
}

.panel--accent {
  border-color: rgba(255, 90, 31, 0.4);
  box-shadow: inset 3px 0 0 var(--orange);
}

.metric {
  display: grid;
  gap: 4px;
  padding-block: 10px;
  border-top: 1px solid var(--line);
}

.metric__value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--teal);
  line-height: 1.1;
}

.metric__label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.metric--gold .metric__value { color: var(--gold); }
.metric--orange .metric__value { color: var(--orange); }

.index-list { border-top: 1px solid var(--line); }

.index-list__item { border-bottom: 1px solid var(--line); }

.index-list__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: baseline;
  padding: 14px 2px;
  transition: padding-inline-start var(--dur) var(--ease), color var(--dur) var(--ease);
}

.index-list__link:hover {
  padding-inline-start: 10px;
  color: var(--teal);
}

.index-list__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.index-list__text { font-weight: 600; }

.index-list__meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- 10. Media containers（页面阶段放图） ---------- */
.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  background: var(--char);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--portrait { aspect-ratio: 4 / 5; }

.media__img {
  position: relative;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06) brightness(0.86);
  transition: transform 0.6s var(--ease), filter 0.6s var(--ease);
}

.media:hover .media__img {
  transform: scale(1.045);
  filter: saturate(1.06) contrast(1.1) brightness(0.96);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 17, 31, 0) 42%, rgba(7, 17, 31, 0.8) 100%);
}

.media__ph {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: grid;
  place-items: center;
  padding: 12px;
  text-align: center;
  background:
    repeating-linear-gradient(135deg, rgba(143, 163, 184, 0.09) 0 1px, transparent 1px 14px),
    linear-gradient(160deg, #12202D, #0A1420);
  color: var(--stone);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.media__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 12px;
  background: var(--orange);
  color: #0A0F14;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.14em;
}

.media__stamp {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 2;
  padding: 6px 10px;
  border-left: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line-2);
  background: rgba(7, 17, 31, 0.84);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
}

/* ---------- 11. Reveal ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

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

/* ---------- 12. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 999;
  padding: 12px 20px;
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  transform: translateY(-240%);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: none;
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

/* ============================================================
   13. Header / 侧轨导航
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 17, 31, 0.95);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.rail {
  position: relative;
  padding: 12px var(--gutter);
}

.rail__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

/* 品牌 */
.rail__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.rail__mark {
  position: relative;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--orange);
  color: #07111F;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1;
  transition: background var(--dur) var(--ease);
}

.rail__mark::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 8px;
  height: 8px;
  background: var(--ink);
}

.rail__brand:hover .rail__mark { background: var(--teal); }

.rail__brand-text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.rail__brand-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.2;
  color: var(--bone);
}

.rail__brand-sub {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

/* 移动端触发器 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line-2);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

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

.nav-toggle__bars span {
  display: block;
  width: 100%;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__bars span:nth-child(2) { opacity: 0; }

.site-header[data-open] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 抽屉（移动端默认） */
.rail__drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  width: min(88vw, 344px);
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 78px 22px 28px;
  overflow-y: auto;
  border-left: 1px solid var(--line-2);
  background:
    linear-gradient(180deg, rgba(11, 25, 38, 1) 0%, rgba(7, 17, 31, 1) 72%),
    var(--ink);
  transform: translateX(102%);
  visibility: hidden;
  transition: transform 0.4s var(--ease), visibility 0.4s var(--ease);
}

.site-header[data-open] .rail__drawer {
  transform: none;
  visibility: visible;
}

.rail__scrim {
  position: fixed;
  inset: 0;
  z-index: 85;
  background: rgba(5, 12, 21, 0.74);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s var(--ease), visibility 0.3s var(--ease);
}

.site-header[data-open] .rail__scrim {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

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

/* 数据节拍 */
.rail__pulse {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
}

.rail__pulse-dot {
  flex: 0 0 auto;
  width: 7px;
  height: 7px;
  background: var(--teal);
  animation: pulseDot 2.6s ease-in-out infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(25, 227, 177, 0.55); }
  50% { opacity: 0.5; box-shadow: 0 0 0 5px rgba(25, 227, 177, 0); }
}

/* 导航 */
.rail__nav {
  flex: 1 1 auto;
  min-height: 0;
}

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

.rail__item { border-bottom: 1px solid var(--line); }

.rail__link {
  position: relative;
  display: grid;
  grid-template-columns: 28px 1fr;
  align-items: center;
  gap: 12px;
  padding: 13px 6px 13px 14px;
  color: #C3CDD8;
  transition:
    color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    padding-inline-start var(--dur) var(--ease);
}

.rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform var(--dur) var(--ease);
}

.rail__link:hover {
  color: var(--bone);
  padding-inline-start: 20px;
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.10), transparent 72%);
}

.rail__link:hover::before { transform: scaleY(1); }

.rail__link[aria-current="page"] {
  color: var(--bone);
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.17), transparent 76%);
}

.rail__link[aria-current="page"]::before { transform: scaleY(1); }

.rail__index {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.rail__link[aria-current="page"] .rail__index { color: var(--orange); }

.rail__label {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.rail__foot {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}

.rail__cta {
  width: 100%;
  justify-content: space-between;
}

.rail__note {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--stone);
}

/* 滚动进度 */
.rail__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: rgba(143, 163, 184, 0.14);
}

.rail__progress-bar {
  --progress: 0;
  display: block;
  width: calc(var(--progress) * 100%);
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--orange));
  transition: width 0.12s linear;
}

/* ---------- 14. 桌面：固定侧轨 ---------- */
@media (min-width: 1024px) {
  body { padding-inline-start: var(--rail-w); }

  .site-header {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    width: var(--rail-w);
    border-bottom: 0;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, #07111F 0%, #0A1624 56%, #07111F 100%);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .rail {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    height: 100%;
    padding: 28px 22px 24px;
  }

  .rail__head { display: block; }

  .nav-toggle { display: none; }

  .rail__drawer {
    position: static;
    top: auto;
    right: auto;
    bottom: auto;
    z-index: auto;
    width: auto;
    height: auto;
    flex: 1 1 auto;
    min-height: 0;
    margin-top: 26px;
    padding: 0;
    overflow: visible;
    border: 0;
    background: none;
    transform: none;
    visibility: visible;
    transition: none;
  }

  .rail__nav {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--stone) transparent;
  }

  .rail__nav::-webkit-scrollbar { width: 4px; }
  .rail__nav::-webkit-scrollbar-thumb { background: var(--stone); }

  .rail__pulse { margin-top: 18px; }

  .rail__list { margin-top: 22px; }

  .rail__foot {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
  }

  .rail__scrim { display: none; }

  .rail__progress {
    left: auto;
    right: -1px;
    top: 0;
    bottom: 0;
    width: 2px;
    height: auto;
  }

  .rail__progress-bar {
    width: 100%;
    height: calc(var(--progress) * 100%);
    background: linear-gradient(180deg, var(--teal), var(--orange));
    transition: height 0.12s linear;
  }
}

/* ============================================================
   15. Footer
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(40px, 6vw, 88px);
  overflow: hidden;
  border-top: 1px solid var(--line-2);
  background: var(--char);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(135deg, rgba(255, 90, 31, 0.05) 0 2px, transparent 2px 12px),
    radial-gradient(120% 90% at 88% 0%, rgba(25, 227, 177, 0.10), transparent 62%);
}

.footer__inner {
  position: relative;
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(34px, 5vw, 64px) var(--gutter) 28px;
}

.footer__top {
  display: grid;
  gap: 18px;
  padding-bottom: clamp(22px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 900px) {
  .footer__top {
    grid-template-columns: minmax(260px, 0.9fr) minmax(0, 1.3fr);
    gap: 40px;
    align-items: end;
  }
}

.footer__brand {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.footer__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  background: var(--orange);
  color: #07111F;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1;
}

.footer__name {
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.footer__tagline {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal);
}

.footer__summary {
  max-width: 54ch;
  font-size: 0.95rem;
  line-height: 1.78;
  color: #AEB9C4;
}

.footer__grid {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding-block: clamp(24px, 3.4vw, 42px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 760px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1000px) {
  .footer__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}

.footer-col__list {
  display: grid;
  gap: 9px;
}

.footer-col__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.92rem;
  color: #C3CDD8;
  transition: color var(--dur) var(--ease);
}

.footer-col__link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--orange);
  transition: width var(--dur) var(--ease);
}

.footer-col__link:hover { color: var(--bone); }
.footer-col__link:hover::before { width: 14px; }

.footer-col__link[aria-current="page"] { color: var(--orange); }
.footer-col__link[aria-current="page"]::before { width: 14px; }

.footer-col__tip {
  position: relative;
  padding-left: 14px;
  font-size: 0.86rem;
  line-height: 1.6;
  color: #93A1AE;
}

.footer-col__tip::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background: var(--teal);
}

.footer__contact {
  display: grid;
  gap: 0;
  align-content: start;
}

.footer__row {
  display: grid;
  gap: 2px;
  padding-block: 8px;
  border-top: 1px solid var(--line);
}

.footer__row:first-of-type { border-top: 0; padding-top: 0; }

.footer__key {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.footer__val {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--bone);
  word-break: break-word;
}

.footer__val--text {
  font-family: var(--font-body);
  font-size: 0.88rem;
  letter-spacing: 0;
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.footer__legal { color: var(--mist); }
.footer__icp { color: var(--stone); }
.footer__note { color: var(--teal); }

/* ---------- 16. 降级 / 无障碍 ---------- */
@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;
  }

  .media:hover .media__img { transform: none; }
  .btn:hover { transform: none; }

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