/* =========================================================
   IM电竞娱乐 · 全站共享样式系统
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  /* 矿物色系 + 电竞点缀 */
  --c-space: #0B1F3A;
  --c-rock: #4A5568;
  --c-moss: #7A8450;
  --c-clay: #C87A5A;
  --c-cream: #F5F0E6;
  --c-purple: #9B59B6;
  --c-yellow: #E2C044;
  --c-ink: #071525;
  --c-fog: #E2E8F0;

  /* 字体 */
  --font-heading: 'Inter Thin', 'Inter', 'Noto Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Mono', 'JetBrains Mono', Consolas, 'Courier New', monospace;

  /* 边框阴影 */
  --border: 2px solid var(--c-rock);
  --shadow-sm: 4px 4px 0 rgba(7, 21, 37, 0.35);
  --shadow-md: 8px 8px 0 rgba(7, 21, 37, 0.45);
  --shadow-glow: 0 0 24px rgba(155, 89, 182, 0.28);

  /* 圆角 */
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
}

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

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-cream);
  background-color: var(--c-space);
  background-image:
    radial-gradient(ellipse 70% 45% at 85% 0%, rgba(155, 89, 182, 0.14), transparent),
    radial-gradient(ellipse 55% 40% at 0% 100%, rgba(226, 192, 68, 0.06), transparent),
    linear-gradient(rgba(74, 85, 104, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 85, 104, 0.07) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--c-fog);
  text-underline-offset: 2px;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--c-purple);
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

::selection {
  background: var(--c-purple);
  color: var(--c-cream);
}

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

/* ---------- 主内容 ---------- */
#main-content {
  display: block;
  min-height: 55vh;
  padding-top: 132px;
  outline: none;
}

#main-content:focus-visible {
  outline: 3px solid var(--c-yellow);
  outline-offset: -3px;
}

@media (max-width: 860px) {
  #main-content {
    padding-top: 108px;
  }
}

/* ---------- 排版 ---------- */
h1,
h2,
h3 {
  font-family: var(--font-heading);
  color: var(--c-cream);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(40px, 6vw, 84px);
  font-weight: 200;
}

h2 {
  font-size: clamp(30px, 4.4vw, 54px);
  font-weight: 200;
  margin-bottom: 24px;
}

h3 {
  font-size: clamp(19px, 1.8vw, 26px);
  font-weight: 600;
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
}

/* ---------- 通用布局 ---------- */
.container {
  width: min(1280px, 100% - 48px);
  margin-inline: auto;
}

.section {
  margin-bottom: 88px;
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  border-bottom: var(--border);
  padding-bottom: 14px;
  margin-bottom: 36px;
}

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(28px, 3.6vw, 48px);
  font-weight: 200;
  line-height: 1.15;
  color: var(--c-cream);
  margin: 0;
}

.section__desc {
  max-width: 640px;
  color: var(--c-fog);
  font-size: 17px;
  margin: 0;
}

.section-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-rock);
  white-space: nowrap;
  transition: color 0.4s ease;
}

/* ---------- 左右分屏 ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(200px, 280px) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.split__aside {
  position: sticky;
  top: 116px;
  display: grid;
  gap: 12px;
  border-top: 3px solid var(--c-purple);
  padding-top: 16px;
}

.split__aside p {
  margin: 0;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--c-fog);
}

.split__content {
  min-width: 0;
}

@media (max-width: 860px) {
  .split {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .split__aside {
    position: static;
    border-top: 2px solid var(--c-purple);
    border-bottom: 1px solid var(--c-rock);
    padding: 12px 0;
  }
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.grid__span-3 {
  grid-column: span 3;
}

.grid__span-4 {
  grid-column: span 4;
}

.grid__span-5 {
  grid-column: span 5;
}

.grid__span-6 {
  grid-column: span 6;
}

.grid__span-7 {
  grid-column: span 7;
}

.grid__span-8 {
  grid-column: span 8;
}

.grid__span-9 {
  grid-column: span 9;
}

.grid__span-12 {
  grid-column: 1 / -1;
}

@media (max-width: 1080px) {
  .grid__span-3,
  .grid__span-4,
  .grid__span-5,
  .grid__span-6,
  .grid__span-7,
  .grid__span-8,
  .grid__span-9 {
    grid-column: span 6;
  }
}

@media (max-width: 640px) {
  .grid__span-3,
  .grid__span-4,
  .grid__span-5,
  .grid__span-6,
  .grid__span-7,
  .grid__span-8,
  .grid__span-9 {
    grid-column: span 12;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--c-cream);
  background: transparent;
  border: 2px solid var(--c-rock);
  cursor: pointer;
  transition: border-color 0.3s ease, background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, transform 0.2s ease;
}

.btn:hover {
  color: var(--c-cream);
  border-color: var(--c-purple);
  box-shadow: var(--shadow-glow);
}

.btn--primary {
  background: var(--c-yellow);
  border-color: var(--c-yellow);
  color: var(--c-ink);
  font-weight: 700;
}

.btn--primary:hover {
  background: transparent;
  color: var(--c-yellow);
  box-shadow: 0 0 28px rgba(226, 192, 68, 0.3);
}

.btn--ghost {
  border-color: var(--c-rock);
  color: var(--c-fog);
}

.btn--ghost:hover {
  border-color: var(--c-purple);
  color: var(--c-purple);
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: rgba(245, 240, 230, 0.04);
  border: var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.card:hover {
  transform: translate(-3px, -3px);
  border-color: var(--c-moss);
  box-shadow: var(--shadow-md);
  background: rgba(245, 240, 230, 0.06);
}

.card--highlight::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 52px;
  height: 7px;
  background: var(--c-clay);
  border-radius: 0 0 6px 0;
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-fog);
  border: 1px solid var(--c-rock);
  background: transparent;
}

.tag--clay {
  background: var(--c-clay);
  border-color: var(--c-clay);
  color: var(--c-ink);
  font-weight: 600;
}

.tag--moss {
  border-color: var(--c-moss);
  color: var(--c-moss);
}

.tag--purple {
  border-color: var(--c-purple);
  color: var(--c-purple);
}

/* ---------- 面包屑 ---------- */
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  margin-bottom: 32px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-fog);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--c-rock);
  font-family: var(--font-mono);
}

.breadcrumb a {
  color: var(--c-fog);
  text-decoration: none;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-purple);
}

.breadcrumb li[aria-current="page"] {
  color: var(--c-yellow);
}

/* ---------- 数据条 ---------- */
.data-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 48px;
  border-top: var(--border);
  border-bottom: var(--border);
  padding: 28px 0;
  margin-bottom: 24px;
}

.data-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-yellow);
}

.data-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-fog);
}

/* ---------- 图片占位框 ---------- */
.image-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  border: var(--border);
  border-radius: var(--radius-md);
  background-color: rgba(245, 240, 230, 0.02);
  background-image:
    linear-gradient(45deg, rgba(245, 240, 230, 0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(245, 240, 230, 0.05) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(245, 240, 230, 0.05) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(245, 240, 230, 0.05) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.image-frame[data-ratio="16/9"] {
  aspect-ratio: 16 / 9;
}

.image-frame[data-ratio="1/1"] {
  aspect-ratio: 1 / 1;
}

.image-frame[data-ratio="3/2"] {
  aspect-ratio: 3 / 2;
}

.image-frame::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 10px;
  width: 28px;
  height: 28px;
  border-top: 3px solid var(--c-yellow);
  border-left: 3px solid var(--c-yellow);
  z-index: 2;
  pointer-events: none;
}

.image-frame::after {
  content: attr(data-caption);
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  padding: 28px 16px 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-fog);
  background: linear-gradient(transparent, rgba(7, 21, 37, 0.75));
  z-index: 2;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}

/* ---------- 框景结构 ---------- */
.frame {
  position: relative;
  border: 3px solid var(--c-rock);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 5vw, 72px);
  background: rgba(245, 240, 230, 0.02);
  box-shadow: 12px 12px 0 rgba(7, 21, 37, 0.45);
}

.frame::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  width: 88px;
  height: 8px;
  background: var(--c-yellow);
  border-radius: 0 0 8px 0;
}

@media (max-width: 640px) {
  .frame {
    box-shadow: 6px 6px 0 rgba(7, 21, 37, 0.45);
  }
}

/* ---------- 图文错位 ---------- */
.content-offset {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: clamp(20px, 4vw, 56px);
  align-items: center;
  margin-bottom: 48px;
}

.content-offset__media,
.content-offset__body {
  min-width: 0;
}

.content-offset__body {
  padding: clamp(20px, 3vw, 40px);
  border: var(--border);
  border-radius: var(--radius-md);
  background: rgba(245, 240, 230, 0.03);
}

.content-offset--flip .content-offset__media {
  order: 2;
}

@media (max-width: 760px) {
  .content-offset {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .content-offset--flip .content-offset__media {
    order: 0;
  }
}

/* ---------- 技能树 ---------- */
.skill-tree {
  position: relative;
  display: grid;
  gap: 20px;
}

.skill-tree::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--c-rock);
}

.skill-tree__node {
  position: relative;
  margin-left: 28px;
  border: var(--border);
  border-radius: var(--radius-md);
  background: rgba(245, 240, 230, 0.03);
  padding: 24px 26px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.skill-tree__node::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 26px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--c-space);
  border: 3px solid var(--c-moss);
}

.skill-tree__node:hover,
.skill-tree__node.is-active {
  border-color: var(--c-purple);
  box-shadow: var(--shadow-glow);
  background: rgba(155, 89, 182, 0.05);
}

.skill-tree__node.is-current::before {
  background: var(--c-yellow);
  border-color: var(--c-yellow);
  box-shadow: 0 0 12px rgba(226, 192, 68, 0.6);
}

/* ---------- 内页首屏 ---------- */
.page-hero {
  padding: 0;
  margin-bottom: 72px;
}

.page-hero__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--c-yellow);
  margin-bottom: 12px;
}

.page-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(40px, 6vw, 88px);
  font-weight: 200;
  line-height: 1.05;
  max-width: 14em;
  margin-bottom: 16px;
}

.page-hero__desc {
  max-width: 640px;
  font-size: 17px;
  color: var(--c-fog);
}

/* ---------- 滚动状态 ---------- */
[data-scroll-section] {
  scroll-margin-top: 116px;
  border-left: 3px solid var(--c-rock);
  padding-left: clamp(16px, 2.4vw, 28px);
  transition: border-color 0.4s ease;
}

[data-scroll-section].is-active {
  border-left-color: var(--c-purple);
}

[data-scroll-section].is-active .section-index {
  color: var(--c-yellow);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  will-change: opacity, transform;
}

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

[data-reveal-delay="1"] {
  transition-delay: 0.12s;
}

[data-reveal-delay="2"] {
  transition-delay: 0.24s;
}

[data-reveal-delay="3"] {
  transition-delay: 0.36s;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -96px;
  left: 20px;
  z-index: 3000;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  background: var(--c-yellow);
  color: var(--c-ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 20px;
}

/* ---------- 阅读进度 ---------- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 2001;
  background: linear-gradient(90deg, var(--c-purple) 0%, var(--c-yellow) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
  transition: transform 0.12s linear;
  border-radius: 0 2px 2px 0;
}

/* ---------- 头部悬浮胶囊导航 ---------- */
.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: min(calc(100% - 32px), 1320px);
  border-radius: var(--radius-pill);
  background: rgba(11, 31, 58, 0.85);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(74, 85, 104, 0.7);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(245, 240, 230, 0.06);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px 8px 18px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-cream);
  flex-shrink: 0;
}

.site-header__brand:hover {
  color: var(--c-cream);
}

.site-header__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 30px;
  padding: 0 6px;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 16px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-yellow);
  background: rgba(226, 192, 68, 0.12);
  border: 1px solid rgba(226, 192, 68, 0.45);
}

.site-header__brand-text {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-cream);
  white-space: nowrap;
}

.site-header__nav {
  margin: 0;
}

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

.site-header__nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1.4;
  color: var(--c-fog);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.3s ease, color 0.3s ease;
}

.site-header__nav-link:hover,
.site-header__nav-link:focus-visible {
  color: var(--c-cream);
  background: rgba(245, 240, 230, 0.06);
}

.site-header__nav-link[aria-current="page"] {
  color: var(--c-cream);
  background: var(--c-purple);
  box-shadow: 0 2px 14px rgba(155, 89, 182, 0.35);
}

.site-header__toggle {
  display: none;
  margin-left: 4px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-rock);
  background: rgba(245, 240, 230, 0.03);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-header__toggle:hover {
  border-color: var(--c-purple);
}

.site-header__toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-cream);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-header__toggle-label {
  font-size: 9px;
  letter-spacing: 0.14em;
  color: var(--c-fog);
  line-height: 1;
  margin-top: 1px;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

@media (max-width: 860px) {
  .site-header {
    top: 10px;
    width: calc(100% - 20px);
  }

  .site-header__inner {
    padding: 6px 6px 6px 14px;
  }

  .site-header__toggle {
    display: flex;
    flex-shrink: 0;
  }

  .site-header__nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    margin: 0;
    padding: 12px;
    border-radius: 24px;
    background: rgba(11, 31, 58, 0.97);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border: 1px solid var(--c-rock);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  }

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

  .site-header__nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-header__nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    border-radius: 12px;
    font-size: 15px;
  }

  .site-header__nav-link[aria-current="page"] {
    background: transparent;
    box-shadow: none;
    border: 1px solid var(--c-purple);
  }
}

@media (max-width: 420px) {
  .site-header__brand-text {
    display: none;
  }

  .site-header__brand-mark {
    min-width: 40px;
    height: 34px;
    font-size: 18px;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 96px;
  background: var(--c-ink);
  border-top: 3px solid var(--c-rock);
  color: var(--c-fog);
}

.site-footer__main {
  width: min(1280px, 100% - 48px);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.3fr;
  gap: 48px;
  padding: 64px 0 48px;
}

.site-footer__logo {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-cream);
  margin-bottom: 12px;
}

.site-footer__logo span {
  color: var(--c-yellow);
}

.site-footer__about {
  max-width: 320px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-fog);
  margin-bottom: 12px;
}

.site-footer__trust {
  max-width: 360px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-rock);
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-yellow);
  margin-bottom: 18px;
  text-transform: uppercase;
}

.site-footer__col {
  min-width: 0;
}

.site-footer__links {
  display: grid;
  gap: 8px;
}

.site-footer__links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--c-fog);
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.site-footer__links a::before {
  content: "›";
  font-family: var(--font-mono);
  color: var(--c-rock);
  transition: color 0.3s ease;
}

.site-footer__links a:hover,
.site-footer__links a:focus-visible {
  color: var(--c-purple);
  padding-left: 4px;
}

.site-footer__links a:hover::before,
.site-footer__links a:focus-visible::before {
  color: var(--c-purple);
}

.site-footer__contact {
  margin-top: 22px;
  display: grid;
  gap: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-fog);
}

.site-footer__bottom {
  border-top: 1px solid rgba(74, 85, 104, 0.35);
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 12.5px;
  color: var(--c-rock);
}

.site-footer__icp {
  letter-spacing: 0.06em;
}

.site-footer__copyright {
  letter-spacing: 0.04em;
}

.site-footer__legacy {
  width: 100%;
  text-align: center;
  font-size: 12px;
  color: rgba(74, 85, 104, 0.8);
}

@media (max-width: 900px) {
  .site-footer__main {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 48px;
    padding-bottom: 36px;
  }

  .site-footer__bottom {
    padding: 16px 20px;
    justify-content: center;
    text-align: center;
  }
}

/* ---------- 动效偏好 ---------- */
@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;
  }

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

  .progress-bar {
    transition: none;
  }
}