/* =========================================================
   BEPLAY必博 — Site Kit 共享层
   设计语言：数字宇宙控制台 / 暖纸存档桌面 + 深蓝控制屏
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
  --paper: #F7F3EE;
  --ink: #1F2933;
  --ink-soft: #6B7280;
  --deep-blue: #0A192F;
  --blue-2: #112240;
  --cyan: #00E5FF;
  --orange: #FF6B35;
  --glass: rgba(255, 255, 255, 0.68);
  --glass-border: rgba(10, 25, 47, 0.14);
  --green: #10B981;
  --yellow: #F59E0B;
  --white-72: rgba(255, 255, 255, 0.72);
  --white-40: rgba(255, 255, 255, 0.4);
  --font-head: 'Space Grotesk', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, 'Noto Sans SC', monospace;
  --header-h: 72px;
  --content-w: 1200px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-panel: 0 10px 30px rgba(10, 25, 47, 0.08);
  --grad-signal: linear-gradient(90deg, var(--cyan), var(--orange));
}

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

html {
  background: var(--paper);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  padding-left: 1.4rem;
}

a {
  color: var(--cyan);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  line-height: 1.2;
  font-weight: 700;
  text-wrap: balance;
}

p, li {
  text-wrap: pretty;
}

::selection {
  background: var(--cyan);
  color: var(--deep-blue);
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

[hidden] {
  display: none !important;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 12px);
}

/* ---------- 容器 / 章节 / 正文 ---------- */
.container {
  width: calc(100% - 2rem);
  max-width: var(--content-w);
  margin-inline: auto;
}

@media (min-width: 640px) {
  .container {
    width: calc(100% - 3rem);
  }
}

.stack-section {
  position: relative;
  padding-block: clamp(3.5rem, 8vw, 6rem);
}

.stack-section__head {
  display: grid;
  gap: 0.6rem;
  margin-bottom: 2.25rem;
}

.stack-section__kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.stack-section__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  color: var(--ink);
}

.section--dark {
  background-color: var(--deep-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--white-72);
}

.section--dark .stack-section__title {
  color: #fff;
}

.section--dark .stack-section__kicker {
  color: var(--orange);
}

.content {
  max-width: 68ch;
}

.content p, .content li {
  line-height: 1.85;
}

.content h2,
.content h3 {
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.content p {
  margin-bottom: 1.1rem;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid--split {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: clamp(2rem, 6vw, 4.5rem);
    align-items: center;
  }
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1300;
  padding: 0.7rem 1.1rem;
  background: var(--orange);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 8px;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

/* ---------- 顶部阅读进度 ---------- */
.site-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 3px;
  z-index: 1200;
  pointer-events: none;
}

.site-progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--grad-signal);
  transition: width 0.1s linear;
}

/* ---------- 页头 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  height: var(--header-h);
  color: #fff;
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: var(--paper);
  color: var(--ink);
  border-bottom-color: var(--glass-border);
  box-shadow: 0 6px 24px rgba(10, 25, 47, 0.08);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  height: 100%;
  width: calc(100% - 2rem);
  max-width: var(--content-w);
  margin-inline: auto;
}

/* ---------- 品牌 ---------- */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
  flex-shrink: 0;
}

.site-brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--cyan), var(--blue-2));
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.76rem;
  letter-spacing: 0.02em;
}

.site-brand__mark::after {
  content: '';
  position: absolute;
  top: -3px;
  right: -3px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.3);
}

.site-brand__mark::before {
  content: '';
  position: absolute;
  inset: auto 0 0 auto;
  width: 10px;
  height: 2px;
  background: var(--orange);
  opacity: 0.8;
}

.site-brand__text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.site-brand__cn {
  margin-left: 0.35rem;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 页头导航（桌面） ---------- */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.35rem 0.1rem;
  color: inherit;
  opacity: 0.86;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: opacity 0.2s ease, color 0.2s ease;
}

.site-nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--grad-signal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.site-nav__link:hover {
  opacity: 1;
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--orange);
  opacity: 1;
}

/* ---------- 页头检索 ---------- */
.site-search {
  position: relative;
  display: flex;
  align-items: center;
  margin-left: auto;
  flex-shrink: 1;
  min-width: 0;
}

.site-nav + .site-search {
  margin-left: 0.6rem;
}

.site-search::before {
  content: '';
  position: absolute;
  left: 0.7rem;
  top: 50%;
  width: 10px;
  height: 10px;
  border: 1.5px solid currentColor;
  border-radius: 50%;
  transform: translateY(-62%);
  pointer-events: none;
}

.site-search::after {
  content: '';
  position: absolute;
  left: 1.5rem;
  top: 56%;
  width: 6px;
  height: 1.5px;
  background: currentColor;
  transform: rotate(45deg);
  pointer-events: none;
}

.site-search__input {
  width: min(210px, 24vw);
  min-width: 0;
  padding: 0.45rem 0.8rem 0.45rem 2rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  transition: border-color 0.2s ease, color 0.2s ease, opacity 0.2s ease;
}

.site-search__input::placeholder {
  color: currentColor;
  opacity: 0.55;
}

.site-search__input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.site-search__status {
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--orange);
  pointer-events: none;
}

/* ---------- 移动导航按钮 ---------- */
.site-nav-toggle {
  display: none;
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: var(--radius-sm);
  background: transparent;
  color: inherit;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.site-nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: currentColor;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-nav-toggle__bar + .site-nav-toggle__bar {
  margin-top: 4px;
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 移动端页头与导航 ---------- */
@media (max-width: 899px) {
  .site-nav-toggle {
    display: flex;
  }

  .site-search__input {
    width: min(150px, 34vw);
  }

  .site-search__status {
    display: none;
  }

  html.js .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 990;
    margin-left: 0;
    padding: 0.75rem 1.5rem 1.5rem;
    background: rgba(247, 243, 238, 0.97);
    color: var(--ink);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 24px 48px rgba(10, 25, 47, 0.18);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.25s ease, opacity 0.25s ease, visibility 0.25s ease;
  }

  html.js .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item {
    border-bottom: 1px dashed var(--glass-border);
  }

  .site-nav__item:last-child {
    border-bottom: 0;
  }

  .site-nav__link {
    display: block;
    padding: 0.9rem 0.25rem;
    font-size: 1.05rem;
  }

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

/* ---------- 封面头图 ---------- */
.page-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--deep-blue);
  background-image:
    radial-gradient(circle at 78% 18%, rgba(0, 229, 255, 0.18), transparent 42%),
    radial-gradient(circle at 14% 82%, rgba(255, 107, 53, 0.16), transparent 40%),
    linear-gradient(120deg, transparent 62%, rgba(0, 229, 255, 0.06) 63%, transparent 78%);
  color: #fff;
  padding: calc(var(--header-h) + clamp(3.5rem, 9vw, 7rem)) 0 clamp(3rem, 7vw, 5.5rem);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
}

.page-hero > * {
  position: relative;
  z-index: 1;
}

.page-hero--compact {
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 2.5rem;
}

.page-hero__index {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-hero__index::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  animation: status-pulse 2.4s ease-out infinite;
}

.page-hero__title {
  margin: 1rem 0 0.8rem;
  font-size: clamp(2.2rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  max-width: 14ch;
}

.page-hero__lead {
  margin: 0;
  max-width: 54rem;
  font-size: 1.05rem;
  color: var(--white-72);
}

.page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.8rem;
}

/* ---------- 封面索引清单 ---------- */
.index-list {
  margin: 2.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
  max-width: 44rem;
}

.index-list li {
  display: flex;
  gap: 0.8rem;
  align-items: baseline;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--white-40);
}

.index-list li::before {
  content: attr(data-index);
  color: var(--orange);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.index-list a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.index-list a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.breadcrumb li + li::before {
  content: '/';
  color: var(--ink-soft);
}

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

.breadcrumb a:hover {
  color: var(--orange);
}

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

.breadcrumb--hero [aria-current="page"] {
  color: var(--white-72);
}

.breadcrumb--hero li + li::before {
  color: var(--white-40);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  border: 2px solid transparent;
  border-radius: 999px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #fff;
}

.btn--primary:hover {
  background: #ff7a42;
  border-color: #ff7a42;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 107, 53, 0.35);
}

.btn--ghost {
  background: transparent;
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn--ghost:hover {
  background: var(--cyan);
  color: var(--deep-blue);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 229, 255, 0.28);
}

.btn--light {
  background: #fff;
  border-color: #fff;
  color: var(--deep-blue);
}

.btn--light:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(255, 255, 255, 0.22);
}

/* ---------- 卡片与玻璃面板 ---------- */
.panel {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-panel);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.interactive-card {
  transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.interactive-card:hover {
  transform: translateY(-3px);
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--cyan), 0 14px 36px rgba(0, 229, 255, 0.16);
}

.interactive-card:hover .status-dot {
  animation: status-pulse 1.1s ease-out infinite;
}

/* ---------- 等宽索引标签 ---------- */
.index-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.06);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.index-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

/* ---------- 状态灯 ---------- */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  color: var(--green);
  flex-shrink: 0;
  animation: status-pulse 2.2s ease-out infinite;
}

.status-dot--online {
  color: var(--green);
}

.status-dot--update {
  color: var(--yellow);
}

.status-dot--new {
  color: var(--orange);
}

.status-dot--cyan {
  color: var(--cyan);
}

@keyframes status-pulse {
  0% {
    box-shadow: 0 0 0 0 currentColor;
  }
  70% {
    box-shadow: 0 0 0 10px transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

/* ---------- 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  background-color: var(--deep-blue);
  background-image:
    radial-gradient(circle at 78% 22%, rgba(0, 229, 255, 0.2), transparent 44%),
    radial-gradient(circle at 16% 84%, rgba(255, 107, 53, 0.16), transparent 40%),
    linear-gradient(120deg, transparent 55%, rgba(0, 229, 255, 0.08) 56%, transparent 78%);
}

.media-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 40%, rgba(255, 255, 255, 0.12) 48%, transparent 56%);
  transform: translateX(-100%);
  animation: frame-sweep 4.4s ease-in-out infinite alternate;
  pointer-events: none;
}

.media-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}

.media-frame--wide {
  aspect-ratio: 16 / 9;
}

.media-frame--tall {
  aspect-ratio: 3 / 4;
}

.media-frame--orange {
  background-image:
    radial-gradient(circle at 70% 24%, rgba(255, 107, 53, 0.24), transparent 46%),
    radial-gradient(circle at 20% 80%, rgba(0, 229, 255, 0.12), transparent 40%),
    linear-gradient(120deg, transparent 55%, rgba(255, 107, 53, 0.1) 56%, transparent 78%);
}

@keyframes frame-sweep {
  to {
    transform: translateX(100%);
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--deep-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--white-72);
  padding-top: 4rem;
}

.site-footer > * {
  position: relative;
  z-index: 1;
}

.site-footer__top {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
  width: calc(100% - 2rem);
  max-width: var(--content-w);
  margin-inline: auto;
  padding-bottom: 3rem;
}

@media (min-width: 700px) {
  .site-footer__top {
    grid-template-columns: 1.2fr 0.9fr 1.4fr;
    gap: 2.5rem;
  }
}

.site-brand--footer {
  color: #fff;
}

.site-footer__statement {
  margin-top: 1rem;
  max-width: 34rem;
  font-size: 0.95rem;
  color: var(--white-40);
}

.site-footer__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.25rem;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--white-40);
}

.site-footer__badges li {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.site-footer__title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.site-footer__list a {
  color: var(--white-72);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.site-footer__list a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

.site-footer__list--contact li {
  display: block;
  font-size: 0.92rem;
  color: var(--white-72);
  word-break: break-word;
}

.site-footer__label {
  display: block;
  margin-bottom: 0.15rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white-40);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  width: calc(100% - 2rem);
  max-width: var(--content-w);
  margin-inline: auto;
  padding: 1.4rem 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--white-40);
}

.site-footer__copyright,
.site-footer__icp {
  margin: 0;
}

/* ---------- 滚动协议：显现 / 章节高亮 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

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

[data-scrollspy] {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 12px);
}

[data-scrollspy]::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--grad-signal);
  transform: scaleY(0);
  transform-origin: center top;
  transition: transform 0.3s ease;
  pointer-events: none;
}

[data-scrollspy].is-active::before {
  transform: scaleY(1);
}

[data-scrollspy-link] {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

[data-scrollspy-link].is-active {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 宽屏细节 ---------- */
@media (min-width: 1200px) {
  .site-nav__list {
    gap: 1.75rem;
  }
}

/* ---------- 降低动态偏好 ---------- */
@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;
  }

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

  .status-dot,
  .page-hero__index::before,
  .media-frame::before {
    animation: none !important;
  }
}