/* ============================================================
   爱游戏赛场 · /assets/site.css
   共享头部（左侧轨道）、页脚、基础组件与排版系统
   ============================================================ */

:root {
  --ink: #0B0F19;
  --ink-2: #121826;
  --ink-3: #1B2334;
  --paper: #F5F3EE;
  --paper-2: #C6CDDB;
  --orange: #FF5A1F;
  --orange-soft: #FF8A5C;
  --blue: #0066FF;
  --blue-soft: #4D94FF;
  --lime: #B7FF2A;
  --muted: #8A93A6;
  --line: #2A3242;

  --rail-w: 236px;
  --wrap: 1180px;
  --gutter: 26px;
  --radius: 2px;

  --font-display: 'Impact', 'Arial Black', 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', system-ui, sans-serif;
  --font-data: 'JetBrains Mono', 'Roboto Mono', ui-monospace, monospace;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  overflow-wrap: break-word;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
}
main { display: block; }
:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
}
:target { scroll-margin-top: 90px; }

/* ---------- 通用工具 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}
.data {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 200;
  padding: 0.7em 1em;
  background: var(--lime);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transform: translateY(-180%);
  transition: transform 0.16s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ============================================================
   头部 · 左侧轨道
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: 70;
}
.rail {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: linear-gradient(180deg, #0D1220 0%, var(--ink) 46%, #080B12 100%);
  border-right: 1px solid var(--line);
}
.rail__brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 22px 20px;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand__mark {
  position: relative;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 36px;
  height: 36px;
  background: var(--orange);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 100%);
}
.brand__mark::before,
.brand__mark::after {
  content: '';
  display: block;
  width: 3px;
  height: 17px;
  background: var(--ink);
  transform: skewX(-18deg);
}
.brand__mark::after { background: var(--paper); }
.brand__slash {
  display: block;
  width: 3px;
  height: 17px;
  background: var(--ink);
  transform: skewX(-18deg);
}
.brand__text { display: flex; flex-direction: column; line-height: 1.18; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--paper);
}
.brand__desc {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
}
.nav-toggle__bars { display: flex; flex-direction: column; gap: 3px; width: 18px; }
.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--orange);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle__text { line-height: 1; }
.site-header[data-open] .nav-toggle { border-color: var(--orange); }
.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars span:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 导航轨道 */
.rail-nav {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  min-height: 0;
  padding: 22px 0 4px;
  overflow-y: auto;
  scrollbar-width: thin;
}
.rail-nav__eyebrow {
  margin: 0 20px 12px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
}
.rail-nav__list { display: flex; flex-direction: column; }
.rail-nav__item { display: block; }
.rail-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 20px 11px 22px;
  font-size: 15px;
  font-weight: 500;
  color: var(--paper);
  transition: background-color 0.2s ease, color 0.2s ease;
}
.rail-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 4px;
  height: 0;
  background: var(--orange);
  transform: translateY(-50%);
  transition: height 0.18s ease;
}
.rail-link:hover { background: rgba(255, 255, 255, 0.04); }
.rail-link:hover::before { height: 56%; }
.rail-link:hover .rail-link__num { color: var(--orange); }
.rail-link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(255, 90, 31, 0.16), rgba(255, 90, 31, 0) 72%);
  font-weight: 700;
  color: var(--paper);
}
.rail-link[aria-current="page"]::before { height: 72%; background: var(--orange); }
.rail-link[aria-current="page"] .rail-link__num { color: var(--lime); }
.rail-link[aria-current="page"]::after {
  content: '';
  position: absolute;
  right: 16px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(183, 255, 42, 0.18);
  transform: translateY(-50%);
}
.rail-link__num {
  min-width: 18px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.18s ease;
}
.rail-link__label { display: inline-block; }
.rail-nav__foot {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 18px 20px 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.rail-nav__dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(183, 255, 42, 0.16);
}
.rail__action {
  padding: 18px 20px 22px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(0, 102, 255, 0.06), rgba(0, 102, 255, 0.14));
}
.rail__cta { width: 100%; }
.rail__note {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* 阅读进度 */
.rail-progress {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 2px;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}
.rail-progress__bar {
  display: block;
  width: 100%;
  height: calc(var(--p, 0) * 1%);
  background: linear-gradient(180deg, var(--orange), var(--lime));
}
.nav-scrim { display: none; }

/* ============================================================
   通用按钮 / 标签 / 链接
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.72em 1.15em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.15;
  cursor: pointer;
  transition: transform 0.16s ease, background-color 0.18s ease,
    color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 4px 4px 0 rgba(0, 102, 255, 0.55);
}
.btn--primary:hover {
  background: var(--orange-soft);
  box-shadow: 6px 6px 0 rgba(0, 102, 255, 0.7);
}
.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--orange); color: var(--orange-soft); }
.btn--blue { background: var(--blue); color: #FFFFFF; }
.btn--blue:hover { background: var(--blue-soft); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.3em 0.7em;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.14em;
  box-shadow: 3px 3px 0 var(--orange);
}
.tag--lime { box-shadow: 3px 3px 0 var(--lime); }
.tag--blue { box-shadow: 3px 3px 0 var(--blue); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(77, 148, 255, 0.45);
  font-size: 15px;
  font-weight: 700;
  color: var(--blue-soft);
  transition: color 0.18s ease, border-color 0.18s ease;
}
.link-arrow::after { content: '→'; transition: transform 0.18s ease; }
.link-arrow:hover { color: var(--orange-soft); border-color: var(--orange-soft); }
.link-arrow:hover::after { transform: translateX(4px); }

/* ============================================================
   布局容器 / 文本组件
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--narrow { max-width: 820px; }
.section { padding-block: clamp(48px, 7vw, 96px); }
.section--ink-2 { background: var(--ink-2); }
.section--paper { background: var(--paper); color: var(--ink); }

.label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--muted);
}
.label::before {
  content: '';
  width: 22px;
  height: 2px;
  background: var(--orange);
  flex: none;
}
.label--lime::before { background: var(--lime); }
.section--paper .label { color: #5A6377; }
.section--paper .label::before { background: var(--blue); }

.section__title {
  margin-top: 14px;
  font-size: clamp(1.9rem, 4.4vw, 3.4rem);
  letter-spacing: -0.03em;
}
.section__lead {
  margin-top: 16px;
  max-width: 38em;
  font-size: 17px;
  color: var(--paper-2);
}
.section--paper .section__lead { color: #454C5C; }

.lede { font-size: clamp(1.05rem, 1.7vw, 1.32rem); line-height: 1.75; color: var(--paper-2); }
.section--paper .lede { color: #454C5C; }

.prose { max-width: 40em; }
.prose p + p, .prose p + ul, .prose p + ol { margin-top: 1.1em; }
.prose h2 { margin-top: 2em; font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
.prose h3 { margin-top: 1.6em; font-size: clamp(1.2rem, 2vw, 1.45rem); }
.prose ul, .prose ol { margin-top: 1em; padding-left: 1.2em; }
.prose ul li { list-style: square; }
.prose ol li { list-style: decimal; }
.prose li + li { margin-top: 0.5em; }
.prose a {
  color: var(--blue-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose a:hover { color: var(--orange-soft); }
.section--paper .prose a { color: var(--blue); }

.grid { display: grid; gap: var(--gutter); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--sidebar { grid-template-columns: 1fr; }

.breadcrumb { padding-block: 14px; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__item:not(:last-child)::after { content: '/'; color: var(--line); }
.breadcrumb__link { color: var(--paper-2); }
.breadcrumb__link:hover { color: var(--orange-soft); }
.breadcrumb__item[aria-current="page"] { color: var(--paper); }

/* 图片容器基础规则（页面阶段放置实际图片） */
.figure { margin: 0; position: relative; }
.figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(140deg, var(--ink-2), var(--ink-3));
  border: 1px solid var(--line);
}
.figure__media::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    125deg,
    rgba(255, 90, 31, 0.12) 0 2px,
    transparent 2px 14px
  );
}
.figure__media img { position: relative; width: 100%; height: 100%; object-fit: cover; }
.figure__media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(165deg, rgba(11, 15, 25, 0.05) 28%, rgba(11, 15, 25, 0.84));
  pointer-events: none;
}
.figure--tall .figure__media { aspect-ratio: 3 / 4; }
.figure__caption {
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* 显现动效（JS 是否可用决定是否隐藏） */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.js-ready [data-reveal].is-revealed { opacity: 1; transform: none; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  background: var(--ink-2);
  color: var(--paper);
  border-top: 1px solid var(--line);
}
.footer__stripe {
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--orange) 0 64px,
    var(--ink) 64px 72px,
    var(--lime) 72px 78px,
    var(--ink) 78px 86px
  );
}
.footer__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 52px 24px 40px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.footer__lead { max-width: 32em; }
.footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.7rem, 3.4vw, 2.3rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
}
.footer__desc { margin-top: 14px; font-size: 15px; line-height: 1.7; color: var(--paper-2); }
.footer__cta { margin-top: 20px; }
.footer__cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 28px 24px;
}
.footer__col-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--paper);
}
.footer__col-title::before {
  content: '';
  flex: none;
  width: 16px;
  height: 2px;
  background: var(--orange);
}
.footer__links { margin-top: 14px; display: flex; flex-direction: column; gap: 9px; }
.footer__links a {
  display: inline-block;
  padding: 2px 0;
  border-bottom: 1px solid transparent;
  font-size: 15px;
  color: var(--paper-2);
  transition: color 0.18s ease, border-color 0.18s ease;
}
.footer__links a:hover { color: var(--orange-soft); border-bottom-color: var(--orange-soft); }
.footer__contact-list { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }
.footer__contact-list li { display: flex; flex-direction: column; gap: 2px; }
.footer__k {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.footer__v {
  font-family: var(--font-data);
  font-size: 13.5px;
  color: var(--paper);
  overflow-wrap: anywhere;
}
.footer__v--text {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-2);
}
.footer__note {
  margin-top: 16px;
  padding: 12px 14px;
  border-left: 3px solid var(--blue);
  background: rgba(0, 102, 255, 0.1);
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--paper-2);
}
.footer__legal { border-top: 1px solid var(--line); }
.footer__legal-inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 18px 24px 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.footer__icp { color: var(--paper-2); }

.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 65;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.62em 0.95em;
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--ink);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease,
    visibility 0s linear 0.2s;
}
.to-top::after { content: '↑'; }
.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 0.2s ease, transform 0.2s ease, background-color 0.2s ease,
    visibility 0s linear 0s;
}
.to-top:hover { background: var(--orange); }

/* ============================================================
   响应式
   ============================================================ */
@media (min-width: 720px) {
  .grid--2 { grid-template-columns: 1fr 1fr; }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 36px 40px; }
  .footer__lead { grid-column: 1 / -1; }
}

@media (max-width: 1023px) {
  .site-header {
    position: sticky;
    inset: auto;
    top: 0;
    width: 100%;
    border-bottom: 1px solid var(--line);
  }
  .rail {
    flex-direction: row;
    align-items: center;
    height: auto;
    padding: 10px 16px;
    border-right: 0;
    background: linear-gradient(90deg, rgba(255, 90, 31, 0.12), transparent 48%), var(--ink);
  }
  .rail__brand {
    flex: 1 1 auto;
    width: 100%;
    padding: 0;
    border-bottom: 0;
  }
  .nav-toggle {
    display: inline-flex;
    position: relative;
    z-index: 90;
  }
  .rail-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 80;
    width: min(340px, 88vw);
    padding: 78px 0 150px;
    background: var(--ink-2);
    border-left: 1px solid var(--line);
    box-shadow: -24px 0 60px rgba(0, 0, 0, 0.55);
    transform: translateX(102%);
    transition: transform 0.26s cubic-bezier(0.2, 0.8, 0.2, 1);
    overflow-y: auto;
  }
  .site-header[data-open] .rail-nav { transform: translateX(0); }
  .rail-nav__eyebrow { margin: 0 22px 14px; }
  .rail-link { padding: 14px 22px 14px 24px; font-size: 16px; }
  .rail-nav__foot { margin: 20px 22px 0; }
  .rail__action {
    position: fixed;
    right: 0;
    bottom: 0;
    z-index: 81;
    width: min(340px, 88vw);
    padding: 16px 22px calc(18px + env(safe-area-inset-bottom, 0px));
    background: var(--ink-2);
    border-top: 1px solid var(--line);
    transform: translateX(102%);
    visibility: hidden;
    transition: transform 0.26s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0s linear 0.26s;
  }
  .site-header[data-open] .rail__action {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.26s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0s linear 0s;
  }
  .rail-progress {
    top: auto;
    left: 0;
    right: 0;
    bottom: 0;
    width: auto;
    height: 2px;
  }
  .rail-progress__bar {
    width: calc(var(--p, 0) * 1%);
    height: 100%;
    background: linear-gradient(90deg, var(--orange), var(--lime));
  }
  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 75;
    background: rgba(11, 15, 25, 0.72);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
  }
  .site-header[data-open] .nav-scrim { opacity: 1; pointer-events: auto; }
}

@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
  .skip-link { left: calc(var(--rail-w) + 16px); }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--sidebar { grid-template-columns: minmax(0, 1fr) 260px; gap: 48px; }
  .footer__inner {
    grid-template-columns: 1.05fr 1.5fr 0.95fr;
    gap: 48px;
    padding: 60px 24px 46px;
  }
  .footer__lead { grid-column: auto; }
  .to-top { right: 28px; bottom: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js-ready [data-reveal] { opacity: 1; transform: none; }
  .rail-link::before { transition: none; }
}