/* ==========================================================================
   亿万电竞 · 赛事通体育 — /assets/site.css
   共享外壳：reset / 设计令牌 / 中文排版 / 页头 / 页脚 / 基础组件
   ========================================================================== */

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

html, body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote, dl, dd, dt, hr {
  margin: 0;
  padding: 0;
}
ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 设计令牌 ---------- */
:root {
  --ink: #06120E;
  --ink-2: #0F2A22;
  --line: #1D4034;
  --teal: #2AE0C8;
  --orange: #FF7F2A;
  --purple: #A87CFF;
  --paper: #F4EFE4;
  --stone: #B9B3A6;
  --clay: #B8714F;
  --milk: #FBF8F1;

  --accent: var(--teal);
  --accent-soft: rgba(42, 224, 200, .14);
  --accent-line: rgba(42, 224, 200, .34);

  --surface: var(--ink-2);
  --surface-2: #0B211A;

  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-pill: 999px;

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --fs-display: clamp(2.5rem, 7.2vw, 4.5rem);
  --fs-h2: clamp(1.5rem, 3.2vw, 2rem);
  --fs-h3: 1.375rem;
  --fs-body: 16.5px;
  --fs-label: 12px;

  --shell: 1240px;
}

[data-accent="teal"] {
  --accent: var(--teal);
  --accent-soft: rgba(42, 224, 200, .14);
  --accent-line: rgba(42, 224, 200, .34);
}
[data-accent="orange"] {
  --accent: var(--orange);
  --accent-soft: rgba(255, 127, 42, .14);
  --accent-line: rgba(255, 127, 42, .38);
}
[data-accent="purple"] {
  --accent: var(--purple);
  --accent-soft: rgba(168, 124, 255, .16);
  --accent-line: rgba(168, 124, 255, .38);
}
[data-accent="clay"] {
  --accent: var(--clay);
  --accent-soft: rgba(184, 113, 79, .18);
  --accent-line: rgba(184, 113, 79, .44);
}
[data-accent="paper"] {
  --accent: var(--paper);
  --accent-soft: rgba(244, 239, 228, .12);
  --accent-line: rgba(244, 239, 228, .32);
}
[data-accent="stone"] {
  --accent: var(--stone);
  --accent-soft: rgba(185, 179, 166, .14);
  --accent-line: rgba(185, 179, 166, .36);
}

/* ---------- 基础 ---------- */
html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 78% at 10% -12%, rgba(42, 224, 200, .10), transparent 62%),
    radial-gradient(92% 70% at 102% 6%, rgba(168, 124, 255, .09), transparent 64%),
    radial-gradient(64% 52% at 50% 104%, rgba(255, 127, 42, .07), transparent 72%);
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .3;
  mix-blend-mode: soft-light;
  background-image:
    repeating-linear-gradient(0deg, rgba(244, 239, 228, .05) 0 1px, transparent 1px 3px),
    repeating-linear-gradient(90deg, rgba(244, 239, 228, .035) 0 1px, transparent 1px 4px);
}

main {
  position: relative;
  z-index: 1;
  display: block;
}

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

::selection {
  background: var(--accent);
  color: var(--ink);
}

/* ---------- 排版工具 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  opacity: .7;
}

.display-1 {
  font-size: var(--fs-display);
  font-weight: 400;
  line-height: 1.03;
  letter-spacing: -.02em;
  color: var(--milk);
}

.display-2 {
  font-size: var(--fs-h2);
  font-weight: 400;
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--milk);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.9;
  color: var(--stone);
}

.mono { font-family: var(--font-mono); }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(28px, 4vw, 52px);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 布局辅助 ---------- */
.wrap {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 22px;
}

.section { padding-block: clamp(38px, 6vw, 72px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 26px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.grid { display: grid; gap: clamp(18px, 2.4vw, 30px); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }

.stack > * + * { margin-top: var(--stack-gap, 16px); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .68em 1.3em;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(251, 248, 241, .03);
  color: var(--paper);
  font-size: .9375rem;
  line-height: 1.25;
  text-align: center;
  cursor: pointer;
  transition: transform .18s ease-out, border-color .18s ease-out, background-color .18s ease-out, color .18s ease-out, box-shadow .18s ease-out;
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 12px 28px -20px var(--accent);
}

.btn-cta {
  border-color: var(--accent-line);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-cta:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

.btn-quiet {
  border-color: var(--line);
  color: var(--stone);
}

/* ---------- 面包屑 ---------- */
.crumb { padding-block: 20px 4px; }

.crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .14em;
  color: var(--stone);
}

.crumb-link { color: var(--stone); transition: color .18s ease-out; }
.crumb-link:hover { color: var(--accent); }
.crumb-sep { color: var(--line); }
.crumb-current { color: var(--paper); }

/* ---------- 正文 ---------- */
.prose { max-width: 72ch; color: var(--paper); }
.prose p { margin-bottom: 1.2em; }
.prose h2 { margin: 1.6em 0 .6em; font-size: var(--fs-h2); font-weight: 400; line-height: 1.3; letter-spacing: -.01em; color: var(--milk); }
.prose h3 { margin: 1.4em 0 .5em; font-size: var(--fs-h3); font-weight: 400; line-height: 1.35; color: var(--milk); }
.prose ul, .prose ol { margin: 0 0 1.2em 1.15em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: .45em; }
.prose li::marker { color: var(--accent); }
.prose strong { color: var(--milk); font-weight: 500; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { text-decoration-thickness: 2px; }
.prose blockquote {
  margin: 1.4em 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--accent-line);
  color: var(--stone);
}

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background-color: var(--surface-2);
  background-image:
    linear-gradient(140deg, rgba(42, 224, 200, .12), rgba(6, 18, 14, .92) 58%),
    repeating-linear-gradient(115deg, rgba(244, 239, 228, .05) 0 2px, transparent 2px 9px);
  isolation: isolate;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(244, 239, 228, .08);
  border-radius: calc(var(--radius-lg) - 7px);
  pointer-events: none;
}

.media-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.96) contrast(1.06);
}

.media-cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--stone);
}

.ratio-16x9 { aspect-ratio: 16 / 9; }
.ratio-4x3 { aspect-ratio: 4 / 3; }
.ratio-1x1 { aspect-ratio: 1 / 1; }
.ratio-4x5 { aspect-ratio: 4 / 5; }

/* ---------- 面板与展开组 ---------- */
.panel {
  padding: 22px 22px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  transition: border-color .24s ease-out, transform .24s ease-out, background-color .24s ease-out;
}

.panel:hover {
  transform: translateY(-2px);
  border-color: var(--accent-line);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: var(--milk);
  text-align: left;
  cursor: pointer;
  transition: color .18s ease-out;
}

.panel-head:hover { color: var(--accent); }

.panel-title {
  font-size: var(--fs-h3);
  font-weight: 400;
  line-height: 1.35;
  color: inherit;
}

.panel-hint {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .16em;
  color: var(--stone);
}

.panel-body {
  margin-top: 16px;
  color: var(--stone);
  animation: panelIn .24s ease-out both;
}

.panel-body[hidden] { display: none; }
.panel-body > * + * { margin-top: 14px; }

.disc-sign {
  position: relative;
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border: 1px solid var(--accent-line);
  border-radius: 50%;
  transition: transform .24s ease-out, background-color .24s ease-out, border-color .24s ease-out;
}

.disc-sign::before,
.disc-sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
  transition: opacity .24s ease-out, transform .24s ease-out;
}

.disc-sign::before { width: 11px; height: 1.5px; }
.disc-sign::after { width: 1.5px; height: 11px; }

[aria-expanded="true"] .disc-sign {
  background: var(--accent-soft);
  border-color: var(--accent);
  transform: rotate(180deg);
}

[aria-expanded="true"] .disc-sign::after { opacity: 0; }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 过滤芯片 ---------- */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: .45em 1em;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(251, 248, 241, .03);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .12em;
  color: var(--stone);
  cursor: pointer;
  transition: color .18s ease-out, border-color .18s ease-out, background-color .18s ease-out, transform .18s ease-out;
}

.chip:hover {
  color: var(--paper);
  border-color: var(--accent-line);
  transform: translateY(-2px);
}

.chip[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

/* ---------- 统计与状态 ---------- */
.stat-figure { display: flex; flex-direction: column; gap: 8px; }

.stat-value {
  display: inline-flex;
  align-items: baseline;
  gap: .1em;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 500;
  line-height: .98;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
  color: var(--milk);
}

.stat-unit {
  font-family: var(--font-sans);
  font-size: .3em;
  letter-spacing: .14em;
  color: var(--stone);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--stone);
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: middle;
  animation: dotPulse 2.4s ease-out infinite;
}

@keyframes dotPulse {
  0% { box-shadow: 0 0 0 0 rgba(42, 224, 200, .5); }
  70% { box-shadow: 0 0 0 7px rgba(42, 224, 200, 0); }
  100% { box-shadow: 0 0 0 0 rgba(42, 224, 200, 0); }
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: .3em .72em;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--accent);
}

/* ---------- 横向主题带 ---------- */
.band {
  margin-block: clamp(44px, 7vw, 86px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(42, 224, 200, .07), rgba(6, 18, 14, 0) 46%, rgba(168, 124, 255, .08));
}

.band-inner {
  display: flex;
  align-items: center;
  gap: clamp(24px, 4vw, 54px);
  padding-block: 18px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 20px, #000 calc(100% - 20px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 20px, #000 calc(100% - 20px), transparent 100%);
}

.band-item {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 10px;
  scroll-snap-align: start;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .14em;
  color: var(--stone);
  white-space: nowrap;
}

.band-item strong {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--milk);
}

/* ---------- 滚动进度 ---------- */
.scroll-progress {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  z-index: 120;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--teal), var(--orange) 55%, var(--purple));
  will-change: transform;
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: -70px;
  z-index: 200;
  padding: .6em 1.1em;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--ink);
  font-size: .875rem;
  transition: top .18s ease-out;
}

.skip-link:focus { top: 14px; }

/* ==========================================================================
   页头
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(6, 18, 14, .97), rgba(6, 18, 14, .89));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent 0, var(--accent) 18%, var(--line) 58%, transparent 100%);
  opacity: .62;
  pointer-events: none;
}

.hd-rail { display: none; }

.hd-inner {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 10px 22px 0;
}

.hd-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 18px;
  padding-block: 6px 10px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent-line);
  border-radius: 12px;
  background-image:
    radial-gradient(circle at 50% 50%, rgba(42, 224, 200, .28), transparent 64%),
    linear-gradient(135deg, rgba(42, 224, 200, .16), rgba(6, 18, 14, .3));
  transition: transform .24s ease-out, border-color .24s ease-out;
}

.brand:hover .brand-mark {
  transform: rotate(-8deg) scale(1.05);
  border-color: var(--accent);
}

.brand-mark-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.brand-mark-lg {
  width: 40px;
  height: 40px;
  border-radius: 14px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.3; min-width: 0; }

.brand-name {
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--milk);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--stone);
}

.hd-side {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}

.hd-meta {
  display: none;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.4;
  text-align: right;
}

.hd-meta-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

.hd-meta-line {
  font-family: var(--font-mono);
  font-size: .9375rem;
  letter-spacing: .06em;
  color: var(--accent);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: .58em 1em;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: rgba(251, 248, 241, .03);
  color: var(--paper);
  cursor: pointer;
  transition: border-color .18s ease-out, color .18s ease-out, background-color .18s ease-out;
}

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

.nav-toggle-sign {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle-bar {
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform .24s ease-out, opacity .24s ease-out;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:first-child {
  transform: translateY(3.25px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:last-child {
  transform: translateY(-3.25px) rotate(-45deg);
}

.nav-toggle-label {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: .14em;
}

.site-nav { padding-block: 2px 12px; }

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 4px;
}

.nav-item { list-style: none; }

.nav-link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  padding: .48em .95em;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: .9375rem;
  line-height: 1.4;
  color: var(--paper);
  transition: color .18s ease-out, border-color .18s ease-out, background-color .18s ease-out, transform .18s ease-out;
}

.nav-link:hover {
  transform: translateY(-2px);
  color: var(--accent);
  border-color: var(--accent-line);
}

.nav-link[aria-current="page"] {
  color: var(--milk);
  background: var(--accent-soft);
  border-color: var(--accent-line);
}

.nav-link[aria-current="page"] .nav-index { color: var(--accent); }

.nav-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--stone);
}

.nav-note {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

@keyframes navDrop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 页头：移动端 ---------- */
@media (max-width: 899.98px) {
  .site-nav {
    display: none;
    margin-top: 4px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
    animation: navDrop .24s ease-out both;
  }

  .site-nav[data-open] { display: block; }

  .nav-list { flex-direction: column; gap: 6px; }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: .72em 1em;
    border-color: var(--line);
    border-radius: var(--radius-md);
    background: rgba(15, 42, 34, .62);
  }
}

/* ---------- 页头：桌面端 ---------- */
@media (min-width: 720px) {
  .hd-meta { display: flex; }
}

@media (min-width: 900px) {
  .nav-toggle { display: none; }
  .nav-note { display: none; }
  .site-nav { padding-block: 4px 12px; }
}

@media (min-width: 1080px) {
  .hd-rail {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 58px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    border-right: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(29, 64, 52, .38), rgba(6, 18, 14, 0));
  }

  .hd-rail-text {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .3em;
    color: var(--stone);
  }

  .hd-rail-meta {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .18em;
    color: var(--accent);
  }

  .hd-inner { padding-left: 80px; }
}

@media (max-width: 560px) {
  .btn-cta { padding: .55em 1em; font-size: .8125rem; }
  .brand-name { font-size: .95rem; }
  .brand-sub { font-size: 10px; letter-spacing: .12em; }
  .nav-toggle { padding: .5em .85em; }
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(60px, 9vw, 120px);
  padding-block: clamp(40px, 6vw, 72px) 26px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(15, 42, 34, .58), rgba(6, 18, 14, .94) 62%);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 1px;
  background: linear-gradient(90deg, var(--teal) 0, var(--orange) 45%, var(--purple) 100%);
  opacity: .55;
}

.ft-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 22px;
}

.ft-grid {
  display: grid;
  gap: 34px 30px;
  grid-template-columns: 1fr;
}

.ft-brand-head {
  display: flex;
  align-items: center;
  gap: 14px;
}

.ft-brand-name {
  font-size: 1.0625rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--milk);
}

.ft-brand-sub {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--accent);
}

.ft-note {
  margin-top: 14px;
  max-width: 36ch;
  font-size: .875rem;
  line-height: 1.85;
  color: var(--stone);
}

.ft-col-title {
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--accent);
}

.ft-list { display: flex; flex-direction: column; gap: 2px; }

.ft-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding-block: 5px;
  font-size: .9375rem;
  color: var(--stone);
  transition: color .18s ease-out, transform .18s ease-out;
}

.ft-link::before {
  content: "";
  width: 10px;
  height: 1px;
  background: currentColor;
  opacity: .55;
  transition: width .18s ease-out;
}

.ft-link:hover {
  color: var(--accent);
  transform: translateX(2px);
}

.ft-link:hover::before { width: 18px; }

.ft-contact-list { display: flex; flex-direction: column; }

.ft-contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
  padding-block: 8px;
  border-bottom: 1px dashed rgba(29, 64, 52, .95);
}

.ft-contact-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--stone);
}

.ft-contact-val {
  font-family: var(--font-mono);
  font-size: .875rem;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-all;
}

.ft-copybtn {
  margin-left: auto;
  padding: .25em .75em;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--stone);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: color .18s ease-out, border-color .18s ease-out, background-color .18s ease-out;
}

.ft-copybtn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.ft-copybtn[data-copied] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

.ft-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: 38px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.ft-legal,
.ft-icp {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--stone);
}

@media (min-width: 640px) {
  .ft-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ft-brand { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .ft-grid { grid-template-columns: 1.5fr .85fr .85fr .8fr 1.5fr; }
  .ft-brand { grid-column: auto; }
}

/* ==========================================================================
   显现与动效
   ========================================================================== */
.has-js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease-out, transform .6s ease-out;
}

.has-js .reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .has-js .reveal,
  .has-js .reveal.is-in {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .chip:hover,
  .nav-link:hover,
  .panel:hover,
  .ft-link:hover {
    transform: none;
  }
}