/* =========================================================
   IM电竞中国区 · 全站共享样式 /assets/site.css
   赛博编辑部 × 未来竞技场
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --bg-dark: #0A0B10;
  --bg-panel: #12141D;
  --accent-purple: #A44CFF;
  --accent-blue: #00D4FF;
  --accent-yellow: #FFCC00;
  --text-main: #E6E8F0;
  --text-dim: #8A93A6;
  --success: #2DF2A8;
  --error: #FF4C60;
  --gradient-deep: linear-gradient(135deg, #0E0A1F 0%, #1B1035 100%);
  --gradient-accent: linear-gradient(120deg, #A44CFF 0%, #00D4FF 100%);

  --font-display: 'Orbitron', 'DIN Alternate', 'Bahnschrift', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', 'Cascadia Code', Consolas, 'Courier New', monospace;

  --text-h1: clamp(2rem, 5vw, 3rem);
  --text-h2: clamp(1.6rem, 3vw, 2.25rem);
  --text-h3: 1.75rem;
  --text-body: 1rem;
  --text-small: 0.875rem;
  --text-mono-lg: 1.25rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  --container-w: 1280px;
  --container-pad: clamp(1rem, 3vw, 2rem);
  --header-h: 68px;
  --radius: 2px;
  --ease: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 2. Reset 与基础排版 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas {
  display: block;
  max-width: 100%;
}
input, button, textarea, select { font: inherit; }

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-main);
}
h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4, h5, h6 { font-size: 1.125rem; }

a { color: var(--accent-blue); text-decoration: none; }
a:hover { color: var(--accent-yellow); }

::selection {
  background: rgba(164, 76, 255, 0.45);
  color: #fff;
}

.text-mono { font-family: var(--font-mono); }
.text-dim { color: var(--text-dim); }
.text-accent { color: var(--accent-blue); }
.text-yellow { color: var(--accent-yellow); }

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

/* ---------- 3. 布局系统 ---------- */
.container {
  width: min(100%, var(--container-w));
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.main { min-height: 70vh; }

.main-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}
@media (min-width: 1024px) {
  .main-grid {
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
  .main-grid__aside {
    position: sticky;
    top: calc(var(--header-h) + var(--space-6));
    align-self: start;
  }
}

.section {
  position: relative;
  padding-block: clamp(3rem, 8vw, 6rem);
}
.section--tight { padding-block: clamp(2rem, 5vw, 3.75rem); }
.section--panel { background: var(--gradient-deep); }

.content-start {
  padding-top: calc(var(--header-h) + clamp(2rem, 6vw, 4rem));
}

.decor-line {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-blue), transparent);
}

/* ---------- 4. 跳转链接与滚动进度 ---------- */
.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 2300;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--bg-dark);
  background: var(--accent-yellow);
  border-radius: var(--radius);
  text-decoration: none;
  transform: translateY(calc(-100% - 2rem));
  transition: transform 0.3s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline: none;
  box-shadow: 0 0 0 3px rgba(164, 76, 255, 0.5);
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: 2200;
  background: var(--gradient-accent);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
  pointer-events: none;
}

/* ---------- 5. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.site-header.is-scrolled {
  background: rgba(10, 11, 16, 0.97);
  border-bottom-color: rgba(164, 76, 255, 0.28);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  height: var(--header-h);
}

/* ---------- 品牌 ---------- */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
}
.site-brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text-main);
  background: var(--bg-panel);
  border: 1px solid rgba(164, 76, 255, 0.6);
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.3);
}
.site-brand__mark::after {
  content: "";
  position: absolute;
  top: -3px;
  right: -3px;
  width: 6px;
  height: 6px;
  background: var(--accent-yellow);
}
.site-brand__text {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  line-height: 1.2;
}
.site-brand__cn {
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--text-main);
}
.site-brand__en {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  color: var(--text-dim);
  text-transform: uppercase;
}

/* ---------- 6. 导航 ---------- */
.site-nav {
  display: flex;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.site-nav::-webkit-scrollbar { display: none; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.25rem, 1.2vw, 1.25rem);
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}
@media (min-width: 768px) {
  .site-nav { flex: 1 1 auto; }
  .site-nav__list { margin-left: auto; }
}

.site-nav__item { flex-shrink: 0; }
.site-nav__item + .site-nav__item { border-left: 1px solid rgba(138, 147, 166, 0.16); }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 0.375rem;
  padding: 0.5rem 0.625rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s ease;
}
.site-nav__link:hover { color: var(--accent-blue); }
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.625rem;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: right 0.3s ease;
}
.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after { right: 0.625rem; }
.site-nav__link[aria-current="page"]::after { background: var(--accent-yellow); }

.site-nav__index {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.1em;
  color: var(--accent-purple);
}
.site-nav__link[aria-current="page"] { color: var(--accent-yellow); }
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--accent-yellow); }

@media (max-width: 767px) {
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1001;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: calc(var(--header-h) + var(--space-5)) var(--container-pad) var(--space-7);
    background:
      radial-gradient(60% 40% at 85% 18%, rgba(164, 76, 255, 0.26), transparent 60%),
      radial-gradient(55% 35% at 12% 85%, rgba(0, 212, 255, 0.16), transparent 70%),
      rgba(10, 11, 16, 0.98);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s;
  }
  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity 0.3s ease;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.125rem;
    width: 100%;
    max-width: 420px;
    margin-inline: auto;
    white-space: normal;
  }
  .site-nav__item {
    width: 100%;
    border-left: 0;
    border-bottom: 1px solid rgba(138, 147, 166, 0.12);
  }
  .site-nav__link {
    justify-content: space-between;
    width: 100%;
    padding: 0.875rem 0.25rem;
    font-size: 1.25rem;
  }
  .site-nav__link::after { display: none; }
  .site-nav__index { font-size: 0.75rem; }
  .site-brand,
  .site-header__cta { position: relative; z-index: 1002; }
}

/* ---------- 移动端导航按钮 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  flex-shrink: 0;
  background: transparent;
  border: 1px solid rgba(138, 147, 166, 0.35);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s ease;
}
.nav-toggle:hover { border-color: var(--accent-purple); }
.nav-toggle__line {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-main);
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
  line-height: 1;
}
.nav-toggle.is-active .nav-toggle__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active .nav-toggle__line:nth-child(2) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle.is-active .nav-toggle__label { opacity: 0; }

@media (max-width: 767px) {
  .nav-toggle { display: flex; }
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0.625rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-main);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--gradient-accent);
  color: #0A0B10;
  border: none;
}
.btn-primary:hover {
  color: #0A0B10;
  box-shadow: 0 8px 28px rgba(164, 76, 255, 0.4), 0 0 12px rgba(0, 212, 255, 0.25);
  transform: translateY(-2px);
}

.btn-ghost {
  border-color: rgba(230, 232, 240, 0.28);
  color: var(--text-main);
}
.btn-ghost:hover {
  color: var(--accent-blue);
  border-color: var(--accent-blue);
  box-shadow: inset 0 0 24px rgba(0, 212, 255, 0.06);
}

.btn--sm {
  min-height: 32px;
  padding: 0.375rem 0.875rem;
  font-size: 0.6875rem;
}

/* ---------- 头部 CTA ---------- */
.site-header__cta {
  position: relative;
  flex-shrink: 0;
}
.site-header__cta-arrow { font-size: 1rem; line-height: 1; }

@media (max-width: 480px) {
  .site-header__cta { padding: 0.5rem 0.75rem; }
  .site-header__cta-label {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
}

/* ---------- 8. 通用组件 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}
.breadcrumb__item { display: inline-flex; align-items: center; }
.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin: 0 0.625rem;
  color: var(--accent-purple);
}
.breadcrumb__link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}
.breadcrumb__link:hover { color: var(--accent-blue); }
.breadcrumb__item[aria-current="page"] { color: var(--text-main); }

.section-head {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  position: relative;
}
.section-head__index {
  flex-shrink: 0;
  padding-top: 0.125rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  letter-spacing: 0.2em;
  color: var(--accent-purple);
  writing-mode: vertical-rl;
  text-orientation: upright;
}
.section-head__kicker {
  margin-bottom: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-blue);
}
.section-head__title { margin-bottom: 0.25rem; }
.section-head__note {
  max-width: 72ch;
  margin-top: 0.625rem;
  font-size: 0.8125rem;
  color: var(--text-dim);
}

.vertical-note {
  position: absolute;
  top: var(--space-6);
  right: 0;
  display: none;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-dim);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  pointer-events: none;
}
@media (min-width: 1024px) {
  .vertical-note { display: block; }
}

.leader-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.leader-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  padding: 0.875rem 0.25rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 147, 166, 0.18);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.leader-link:hover { color: var(--accent-blue); padding-left: 0.5rem; }
.leader-link::after {
  content: "";
  flex: 1;
  border-bottom: 1px dotted rgba(138, 147, 166, 0.5);
  transform: translateY(-4px);
}
.leader-link__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.data-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: var(--radius);
}

/* ---------- 9. 数据卡片 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}
@media (min-width: 1024px) {
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
}

.stat-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: var(--space-5);
  background: linear-gradient(160deg, rgba(18, 20, 29, 0.92) 0%, rgba(14, 10, 31, 0.65) 100%);
  border: 1px solid rgba(138, 147, 166, 0.14);
  border-top: 2px solid var(--accent-purple);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 36px;
  height: 36px;
  background: linear-gradient(225deg, rgba(164, 76, 255, 0.28), transparent 60%);
  pointer-events: none;
}
.stat-card__value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent-blue);
}
.stat-card__value--accent { color: var(--accent-yellow); }
.stat-card__unit {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-dim);
  margin-left: 0.25rem;
}
.stat-card__label {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}
.stat-card__accent {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 6px;
  height: 6px;
  background: var(--accent-yellow);
}

/* ---------- 10. 图像容器 ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(164, 76, 255, 0.09), rgba(0, 212, 255, 0.05)),
    var(--bg-panel);
  border: 1px solid rgba(164, 76, 255, 0.22);
  border-radius: var(--radius);
  isolation: isolate;
}
.img-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.img-frame::after {
  content: "IMAGE SLOT";
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  color: rgba(0, 212, 255, 0.5);
  pointer-events: none;
}
.img-frame:has(> img)::after { display: none; }
.img-frame > img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--vertical { aspect-ratio: 3 / 4; }
.img-frame__corner {
  position: absolute;
  z-index: 2;
  width: 14px;
  height: 14px;
  border: 0 solid var(--accent-yellow);
  pointer-events: none;
}
.img-frame__corner--tl { top: 6px; left: 6px; border-top-width: 1px; border-left-width: 1px; }
.img-frame__corner--br { bottom: 6px; right: 6px; border-bottom-width: 1px; border-right-width: 1px; }
.img-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  margin: 0;
  padding: 0.375rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-yellow);
  background: rgba(10, 11, 16, 0.85);
  border-top: 1px solid rgba(164, 76, 255, 0.35);
  border-right: 1px solid rgba(164, 76, 255, 0.35);
}

/* ---------- 11. 标签页 ---------- */
.pane-tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  border-bottom: 1px solid rgba(138, 147, 166, 0.22);
  margin-bottom: var(--space-5);
}
.pane-tabs__tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.pane-tabs__tab:hover { color: var(--accent-blue); }
.pane-tabs__tab[aria-selected="true"] {
  color: var(--text-main);
  border-bottom-color: var(--accent-purple);
}
.pane-tabs__panel[hidden] { display: none; }
.pane-tabs__panel {
  padding: var(--space-5);
  background: rgba(18, 20, 29, 0.45);
  border: 1px solid rgba(138, 147, 166, 0.12);
  border-radius: var(--radius);
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  padding-top: var(--space-8);
  background: var(--gradient-deep);
  border-top: 1px solid rgba(164, 76, 255, 0.35);
}
.site-footer::before {
  content: "IM";
  position: absolute;
  right: -0.04em;
  bottom: -0.24em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(10rem, 26vw, 20rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(164, 76, 255, 0.14);
  pointer-events: none;
  user-select: none;
}
.site-footer__top {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-7);
}
@media (min-width: 768px) {
  .site-footer__top { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .site-footer__top { grid-template-columns: minmax(0, 1.5fr) repeat(3, minmax(0, 1fr)); }
}
.site-footer__logo {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-4);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-main);
  background: linear-gradient(135deg, rgba(164, 76, 255, 0.22), rgba(0, 212, 255, 0.12));
  border: 1px solid rgba(164, 76, 255, 0.5);
  border-radius: var(--radius);
  box-shadow: inset 0 0 0 1px rgba(0, 212, 255, 0.3);
}
.site-footer__tagline {
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-purple);
}
.site-footer__desc {
  max-width: 34ch;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--text-dim);
}
.site-footer__heading {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-blue);
  border-bottom: 1px solid rgba(138, 147, 166, 0.2);
}
.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-footer__links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0;
  font-size: 0.875rem;
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}
.site-footer__links a::before {
  content: "→";
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-purple);
  opacity: 0.75;
}
.site-footer__links a:hover {
  color: var(--accent-yellow);
  transform: translateX(4px);
}
.site-footer__contact {
  margin-top: var(--space-4);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--text-dim);
}
.site-footer__bottom {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  border-top: 1px solid rgba(138, 147, 166, 0.16);
}
@media (min-width: 768px) {
  .site-footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}
.site-footer__version {
  color: var(--accent-yellow);
  border: 1px solid rgba(255, 204, 0, 0.35);
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius);
}
.site-footer__icp { color: var(--text-dim); }
.site-footer__copyright { color: var(--text-main); }
.site-footer__note {
  margin: 0;
  max-width: 60ch;
  font-size: 0.75rem;
  color: var(--text-dim);
}

/* ---------- 13. 滚动显现协议 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 14. 无障碍与动效偏好 ---------- */
:focus-visible {
  outline: 2px solid var(--accent-yellow);
  outline-offset: 3px;
}

body.nav-open { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .js-ready [data-reveal],
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}