/* ============================================================
   BSPORTS 客户端 · 共享站点样式 /assets/site.css
   深海蓝竞技数据平台 · 控制台式侧轨导航 · 粗野主义细节
   ============================================================ */

/* ---------- 根变量 ---------- */
:root {
  --clr-navy: #0B1B3A;
  --clr-navy-2: #0F2440;
  --clr-navy-3: #132D4F;
  --clr-green: #39FF14;
  --clr-green-soft: rgba(57, 255, 20, .14);
  --clr-orange: #FF4B2B;
  --clr-text: #E8F0F8;
  --clr-muted: #8FA8C9;
  --clr-border: #1E3A5F;

  --font-title: 'Anton', 'Arial Narrow', Impact, Haettenschweiler, 'Helvetica Condensed', sans-serif;
  --font-body: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Roboto Mono', Consolas, 'Liberation Mono', monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 96px;

  --container: 1240px;
  --rail-width: 280px;

  --shadow-1: 0 4px 14px rgba(2, 6, 16, .35);
  --shadow-2: 0 10px 30px rgba(2, 6, 16, .45);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: .25s;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  background:
    radial-gradient(1200px 480px at 85% -10%, rgba(57, 255, 20, .06), transparent 60%),
    radial-gradient(900px 420px at 0% 110%, rgba(255, 75, 43, .05), transparent 55%),
    var(--clr-navy);
  color: var(--clr-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--clr-green);
  text-decoration: none;
}

a:hover {
  color: #c8ffb8;
}

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-title);
  font-weight: 400;
  line-height: 1.1;
}

p {
  text-wrap: pretty;
}

strong {
  color: #fff;
  font-weight: 700;
}

/* ---------- 焦点 / 选区 / 滚动条 ---------- */
:focus-visible {
  outline: 2px solid var(--clr-green);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection {
  background: var(--clr-green);
  color: #04101f;
  text-shadow: none;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--clr-navy);
}

::-webkit-scrollbar-thumb {
  background: var(--clr-navy-3);
  border: 2px solid var(--clr-navy);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-green);
}

/* ---------- 桌面端侧轨位移 ---------- */
@media (min-width: 1024px) {
  body {
    padding-left: var(--rail-width);
  }

  #main-content {
    padding-top: 56px;
    min-height: 70vh;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0) scale(.97);
}

.btn-sm {
  padding: 10px 18px;
  font-size: 12px;
  letter-spacing: 1px;
}

.btn-lg {
  padding: 18px 40px;
  font-size: 18px;
}

.btn-solid {
  background: var(--clr-green);
  color: #04121f;
  box-shadow: 0 0 14px rgba(57, 255, 20, .35);
}

.btn-solid:hover {
  background: #a9ff8a;
  color: #04121f;
  box-shadow: 0 0 26px rgba(57, 255, 20, .5);
}

.btn-outline {
  background: transparent;
  border-color: var(--clr-border);
  color: var(--clr-text);
}

.btn-outline:hover {
  border-color: var(--clr-green);
  color: var(--clr-green);
  box-shadow: 0 0 14px rgba(57, 255, 20, .12);
}

.btn-alert {
  background: var(--clr-orange);
  color: #120502;
  box-shadow: 0 0 16px rgba(255, 75, 43, .3);
}

.btn-alert:hover {
  background: #ff6d4d;
  color: #120502;
}

/* ---------- 容器与章节 ---------- */
.container,
.content-shell {
  width: min(100%, var(--container));
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container,
  .content-shell {
    padding-inline: var(--space-5);
  }
}

.section {
  padding-block: var(--space-6);
}

@media (min-width: 768px) {
  .section {
    padding-block: var(--space-7);
  }
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-3);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-green);
}

.section-label::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--clr-green);
}

.section-title {
  font-family: var(--font-title);
  font-size: clamp(40px, 7vw, 88px);
  line-height: .9;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.section-title-sm {
  font-family: var(--font-title);
  font-size: clamp(28px, 4.5vw, 48px);
  line-height: 1;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.section-lede {
  max-width: 720px;
  margin-top: var(--space-3);
  font-size: 18px;
  color: var(--clr-muted);
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2,
.grid-3 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-2,
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--clr-navy-3);
  border: 1px solid var(--clr-border);
  padding: var(--space-4);
  box-shadow: var(--shadow-1);
}

.card::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  width: 36px;
  height: 3px;
  background: var(--clr-green);
  opacity: 0;
  transition: opacity var(--dur);
}

.card:hover::before {
  opacity: 1;
}

.card-highlight {
  border-color: rgba(57, 255, 20, .4);
  box-shadow: 0 0 0 1px rgba(57, 255, 20, .1), var(--shadow-1);
}

.card-alert {
  border-color: rgba(255, 75, 43, .45);
  background: linear-gradient(180deg, rgba(255, 75, 43, .08), var(--clr-navy-3) 45%);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: var(--clr-navy-2);
  border: 1px solid var(--clr-border);
  color: var(--clr-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .5px;
  white-space: nowrap;
}

.tag-live {
  background: var(--clr-orange);
  border-color: var(--clr-orange);
  color: #1a0703;
  font-weight: 700;
}

.tag-live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.tag-data {
  background: var(--clr-green);
  border-color: var(--clr-green);
  color: #04121f;
  font-weight: 700;
}

/* ---------- 数据数字 ---------- */
.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1;
  color: var(--clr-green);
}

.stat-label {
  display: block;
  margin-top: var(--space-2);
  color: var(--clr-muted);
  font-size: 13px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* ---------- 引用块 ---------- */
.callout {
  position: relative;
  border-left: 4px solid var(--clr-green);
  background: var(--clr-navy-2);
  padding: var(--space-4) var(--space-5);
  font-size: 18px;
  line-height: 1.7;
  box-shadow: var(--shadow-1);
}

.callout-alert {
  border-left-color: var(--clr-orange);
}

/* ---------- 图片容器 ---------- */
.figure {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--clr-navy-3);
  border: 1px solid var(--clr-border);
  box-shadow: var(--shadow-1);
}

.figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s var(--ease);
}

.figure:hover img {
  transform: scale(1.03);
}

.figure-169 {
  aspect-ratio: 16 / 9;
}

.figure-43 {
  aspect-ratio: 4 / 3;
}

.figure-11 {
  aspect-ratio: 1 / 1;
}

/* ---------- 首屏基线 ---------- */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-5);
  min-height: 480px;
  padding-block: var(--space-6);
}

@media (min-width: 1024px) {
  .hero {
    grid-template-columns: 1.05fr .95fr;
    min-height: calc(100vh - 56px);
    padding-block: var(--space-7) var(--space-8);
  }
}

/* ---------- 装饰工具 ---------- */
.flow-line {
  height: 2px;
  border: 0;
  background: repeating-linear-gradient(90deg, var(--clr-green) 0 8px, transparent 8px 18px);
  opacity: .35;
}

.plot-bg {
  background-color: var(--clr-navy-2);
  background-image:
    linear-gradient(rgba(30, 58, 95, .25) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 95, .25) 1px, transparent 1px);
  background-size: 32px 32px;
}

.clip-slant {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%);
}

.clip-slant-inverse {
  clip-path: polygon(0 28px, 100% 0, 100% 100%, 0 100%);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
}

.breadcrumbs-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumbs-item {
  display: inline-flex;
  align-items: center;
  color: var(--clr-muted);
}

.breadcrumbs-item + .breadcrumbs-item::before {
  content: '▸';
  margin: 0 10px;
  color: var(--clr-green);
  font-size: 10px;
}

.breadcrumbs-link {
  color: var(--clr-muted);
}

.breadcrumbs-link:hover {
  color: var(--clr-green);
}

.breadcrumbs-item[aria-current="page"] {
  color: var(--clr-text);
}

/* ============================================================
   头部：桌面侧轨 / 移动吸顶 + 抽屉
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1500;
  width: var(--rail-width);
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(200deg, rgba(19, 45, 79, .45) 0%, transparent 30%),
    var(--clr-navy);
  border-right: 1px solid var(--clr-border);
}

/* 无障碍跳转链接 */
.skip-link {
  position: fixed;
  top: 0;
  left: calc(var(--rail-width) + 16px);
  z-index: 5000;
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background: var(--clr-green);
  color: #04101f;
  font-weight: 700;
  font-size: 14px;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transform: translateY(-150%);
  transition: transform .2s var(--ease);
}

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

/* 移动端顶栏（默认隐藏） */
.header-top {
  display: none;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--clr-text);
}

.brand:hover {
  color: #fff;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--clr-green) 0%, #7bff5c 100%);
  color: #05121f;
  font-family: var(--font-title);
  font-style: italic;
  font-size: 21px;
  line-height: 1;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 9px 100%, 0 calc(100% - 9px));
  box-shadow: 0 0 16px rgba(57, 255, 20, .25);
}

.brand-text {
  font-family: var(--font-title);
  font-size: 22px;
  letter-spacing: 3px;
  line-height: 1;
  color: #fff;
}

/* 侧轨导航 */
.site-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.nav-brand {
  padding: var(--space-6) var(--space-5) var(--space-5);
  border-bottom: 1px solid var(--clr-border);
}

.nav-brand::after {
  content: '';
  display: block;
  margin-top: var(--space-4);
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--clr-border) 0 6px, transparent 6px 12px);
}

.nav-tagline {
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 1px;
  color: var(--clr-muted);
  text-transform: uppercase;
}

.nav-list {
  padding: var(--space-3) 0;
  margin-inline: var(--space-4);
  border-bottom: 1px solid var(--clr-border);
}

.nav-item + .nav-item {
  border-top: 1px solid rgba(30, 58, 95, .55);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 12px;
  color: var(--clr-text);
  font-family: var(--font-title);
  font-size: 17px;
  line-height: 1;
  letter-spacing: 2px;
  border-left: 3px solid transparent;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.nav-link:hover {
  background: var(--clr-navy-3);
  color: #fff;
  border-left-color: var(--clr-green);
  transform: translateX(3px);
}

.nav-link[aria-current="page"] {
  background: linear-gradient(90deg, var(--clr-green-soft), transparent 85%);
  border-left-color: var(--clr-green);
  color: var(--clr-green);
}

.nav-index {
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--clr-muted);
  transition: color var(--dur) var(--ease);
}

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

.nav-label {
  display: inline-block;
}

.nav-meta {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--clr-border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--clr-muted);
}

.nav-meta a {
  color: var(--clr-muted);
  transition: color var(--dur);
}

.nav-meta a:hover {
  color: var(--clr-green);
}

.nav-meta-site {
  color: var(--clr-muted);
}

.nav-meta-pipe {
  color: var(--clr-border);
}

/* 桌面顶部工具条 */
.header-utility {
  position: fixed;
  top: 0;
  right: 0;
  left: var(--rail-width);
  z-index: 1400;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: 0 var(--space-5);
  background: rgba(11, 27, 58, .92);
  border-bottom: 1px solid var(--clr-border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.header-search {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  color: var(--clr-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  border: 1px solid var(--clr-border);
  transition:
    border-color var(--dur),
    color var(--dur),
    box-shadow var(--dur);
}

.header-search:hover {
  border-color: var(--clr-green);
  color: var(--clr-text);
  box-shadow: 0 0 12px rgba(57, 255, 20, .1);
}

.header-search-glyph {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16px;
  color: var(--clr-green);
}

/* 滚动进度信号条 */
.scroll-track {
  position: absolute;
  top: 0;
  right: -1px;
  bottom: 0;
  z-index: 20;
  width: 3px;
  background: rgba(30, 58, 95, .35);
}

.scroll-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, var(--clr-green) 0%, var(--clr-orange) 100%);
  transform-origin: top center;
  transform: scaleY(var(--scroll-progress, 0));
}

/* ============================================================
   移动端：吸顶条 + 抽屉
   ============================================================ */
@media (max-width: 1023px) {
  .site-header {
    position: sticky;
    top: 0;
    width: 100%;
    height: auto;
    display: block;
    border-right: 0;
    border-bottom: 1px solid var(--clr-border);
    z-index: 1500;
    background: rgba(11, 27, 58, .94);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  }

  .skip-link {
    left: 16px;
  }

  .header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    height: 56px;
    padding: 0 var(--space-3) 0 var(--space-2);
  }

  .header-utility {
    display: none;
  }

  .brand-mobile .brand-text {
    font-size: 17px;
    letter-spacing: 2px;
  }

  .nav-toggle {
    position: relative;
    z-index: 2500;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid var(--clr-border);
    background: var(--clr-navy-2);
    color: var(--clr-text);
    font-size: 13px;
    font-weight: 600;
  }

  .nav-toggle-label {
    transition: color var(--dur);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-label {
    color: var(--clr-green);
  }

  .nav-toggle-icon {
    position: relative;
    display: block;
    width: 18px;
    height: 14px;
  }

  .nav-toggle-icon::before,
  .nav-toggle-icon::after,
  .nav-toggle-bar {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--clr-green);
    transition:
      transform var(--dur) var(--ease),
      opacity var(--dur) var(--ease);
  }

  .nav-toggle-icon::before {
    top: 0;
  }

  .nav-toggle-bar {
    top: 6px;
  }

  .nav-toggle-icon::after {
    top: 12px;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
    top: 6px;
    transform: rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-bar {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
    top: 6px;
    transform: rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 2100;
    flex: none;
    width: min(86vw, 320px);
    height: 100vh;
    overflow-y: auto;
    background:
      linear-gradient(200deg, rgba(19, 45, 79, .55) 0%, transparent 35%),
      var(--clr-navy);
    border-right: 1px solid var(--clr-border);
    box-shadow: none;
    transform: translateX(-108%);
    transition: transform .3s var(--ease);
  }

  .site-nav[data-open] {
    transform: translateX(0);
    box-shadow: var(--shadow-2);
  }

  .nav-brand {
    padding-top: var(--space-5);
  }

  .brand-side {
    margin-bottom: var(--space-2);
  }

  .scroll-track {
    top: auto;
    bottom: 0;
    right: 0;
    left: 0;
    width: auto;
    height: 3px;
  }

  .scroll-bar {
    width: 100%;
    height: 100%;
    transform-origin: left center;
    transform: scaleX(var(--scroll-progress, 0));
  }

  body.nav-open {
    overflow: hidden;
  }
}

@media (max-width: 400px) {
  .header-top .nav-toggle-label {
    display: none;
  }

  .brand-mobile .brand-text {
    display: none;
  }

  .header-top .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 17px;
  }

  .header-top .btn {
    padding-inline: 12px;
  }
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: var(--space-8);
  background:
    linear-gradient(180deg, rgba(11, 27, 58, 0) 0%, rgba(11, 27, 58, .7) 100%),
    var(--clr-navy-2);
  border-top: 1px solid var(--clr-border);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-green) 0%, transparent 35%, var(--clr-orange) 100%);
  opacity: .25;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-7) var(--space-4) var(--space-6);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1.5fr;
    gap: var(--space-5);
    padding-inline: var(--space-5);
  }
}

.footer-brand .brand {
  margin-bottom: var(--space-3);
}

.brand-footer .brand-text {
  font-size: 18px;
  letter-spacing: 2px;
}

.footer-trust {
  margin-top: var(--space-3);
  color: var(--clr-muted);
  font-size: 15px;
  line-height: 1.8;
}

.footer-site {
  display: inline-flex;
  margin-top: var(--space-4);
  padding: 6px 12px;
  background: rgba(57, 255, 20, .08);
  border: 1px solid rgba(57, 255, 20, .3);
  color: var(--clr-green);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-heading {
  position: relative;
  padding-bottom: 10px;
  margin-bottom: var(--space-4);
  color: var(--clr-text);
  font-size: 18px;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.footer-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--clr-green);
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  display: inline-block;
  color: var(--clr-muted);
  font-size: 15px;
  transition:
    color var(--dur),
    transform var(--dur);
}

.footer-links a:hover {
  color: var(--clr-green);
  transform: translateX(4px);
}

.footer-contact li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--clr-muted);
  font-size: 14px;
  line-height: 1.7;
}

.footer-contact a {
  color: var(--clr-text);
}

.footer-contact a:hover {
  color: var(--clr-green);
}

.contact-label {
  padding-top: 2px;
  color: var(--clr-orange);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--clr-border);
  color: var(--clr-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.footer-legal-links {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-legal-links a {
  color: var(--clr-muted);
}

.footer-legal-links a:hover {
  color: var(--clr-green);
}

/* ============================================================
   入场动画与滚动显现
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  #main-content {
    animation: page-in .35s var(--ease) both;
  }
}

@keyframes page-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity .3s var(--ease),
    transform .3s var(--ease);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

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

  .site-nav {
    transition: none;
  }

  .nav-toggle-icon::before,
  .nav-toggle-icon::after,
  .nav-toggle-bar {
    transition: none;
  }

  .figure img,
  .figure:hover img {
    transform: none;
  }
}