/* ==========================================================================
   LEYU 手机版 · 共享样式 /assets/site.css
   夜靛蓝底 · 侧边赛程轨道 · 纸张叠层与印刷边框
   ========================================================================== */

:root {
  --ink: #08102B;
  --ink-2: #101A3D;
  --rail-line: #1D2B5C;
  --cyan: #1FF0D2;
  --orange: #FF6B2C;
  --paper: #F7F2E8;
  --mist: #AEB8D4;
  --violet: #8B6CFF;
  --paper-2: #E8DFC9;
  --teal: #2A4A55;

  --rail-w: 17rem;
  --wrap: 76rem;
  --line: 1px solid var(--rail-line);

  --font-display: "Barlow Condensed", "Oswald", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

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

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: .012em;
  word-break: break-word;
}

img, svg, video { max-width: 100%; height: auto; display: block; }
button { font: inherit; color: inherit; }
ul, ol { margin: 0 0 1em; padding-left: 1.25em; }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

body.nav-locked { overflow: hidden; }

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

.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 999;
  padding: .6rem 1rem;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-decoration: none;
  border-radius: 2px;
  transform: translateY(-220%);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translateY(0); color: var(--ink); }

/* ---------- 基础排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 .6em;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--paper);
}
h1 { font-size: clamp(2.25rem, 5vw, 4rem); }
h2 { font-size: clamp(1.65rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.5rem); font-weight: 700; line-height: 1.2; }
h4 { font-size: 1.05rem; font-weight: 700; letter-spacing: .04em; }

p { margin: 0 0 1em; }

a { color: var(--cyan); text-underline-offset: .22em; }
a:hover { color: var(--orange); }

strong { font-weight: 700; color: var(--paper); }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1rem, 3vw, 2.5rem);
}

.section { padding-block: clamp(2.5rem, 5vw, 4.5rem); }

.prose { max-width: 68ch; font-size: 1.0625rem; }
.prose p { color: var(--mist); }
.prose h2, .prose h3 { margin-top: 1.6em; }

/* ---------- 章节标记与标签 ---------- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
}
.kicker::before {
  content: "";
  width: 1.7rem;
  height: 2px;
  background: var(--orange);
}

.chapter-mark {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  margin-bottom: .85rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mist);
}
.chapter-mark strong { color: var(--orange); font-weight: 700; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .18rem .5rem;
  background: var(--paper-2);
  color: var(--ink);
  border: 1px solid var(--rail-line);
  border-radius: 1px;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  line-height: 1.5;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .68rem 1.15rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn-primary {
  background: var(--orange);
  color: #160800;
  border-color: var(--orange);
}
.btn-primary:hover { background: #FF8A58; color: #160800; border-color: #FF8A58; }
.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--rail-line);
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 网格 / 卡片 / 数据单元 ---------- */
.grid { display: grid; gap: clamp(1rem, 2vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 21rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }

.card {
  position: relative;
  padding: clamp(1rem, 2vw, 1.5rem);
  background: var(--ink-2);
  border: var(--line);
  border-radius: 2px;
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.card:hover { transform: translateY(-3px); border-color: var(--cyan); }

.stat { display: flex; flex-direction: column; gap: .2rem; }
.stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  line-height: 1;
  color: var(--cyan);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  padding-block: .9rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--mist);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.breadcrumbs a { color: var(--mist); text-decoration: none; }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--paper); }
.breadcrumbs__sep { color: var(--rail-line); }

/* ---------- 可复用图片容器（页面阶段放图） ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--teal);
  border: var(--line);
  border-radius: 2px;
}
.media img { width: 100%; height: 100%; object-fit: cover; }
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(122deg, rgba(8, 16, 43, .62), rgba(8, 16, 43, 0) 62%);
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--banner { aspect-ratio: 21 / 9; }
.media__tag {
  position: absolute;
  left: .6rem;
  bottom: .6rem;
  z-index: 1;
  padding: .22rem .5rem;
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .1em;
}

/* ---------- 折叠组 ---------- */
.disclosure {
  border: var(--line);
  border-radius: 2px;
  background: var(--ink-2);
}
.disclosure + .disclosure { margin-top: .6rem; }
.disclosure summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--paper);
}
.disclosure summary::-webkit-details-marker { display: none; }
.disclosure summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--cyan);
}
.disclosure[open] summary::after { content: "–"; }
.disclosure[open] summary { border-bottom: var(--line); }
.disclosure__body {
  padding: .85rem 1rem 1rem;
  color: var(--mist);
  font-size: .95rem;
}
.disclosure__body > :last-child { margin-bottom: 0; }

/* ==========================================================================
   页头 · 侧边赛程轨道
   ========================================================================== */
.site-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 60;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  background: var(--ink);
  border-right: 1px solid var(--rail-line);
}
.site-rail::after {
  content: "";
  position: absolute;
  top: 0;
  right: -1px;
  width: 3px;
  height: 34%;
  pointer-events: none;
  background: linear-gradient(180deg, var(--cyan), rgba(31, 240, 210, 0) 92%);
  opacity: .75;
}

.rail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .6rem;
  padding: 1.15rem 1rem 1rem;
  border-bottom: 1px solid var(--rail-line);
  transition: box-shadow .25s var(--ease);
}
.site-rail[data-scrolled="true"] .rail-top {
  box-shadow: 0 10px 24px -16px rgba(0, 0, 0, .95);
}

.rail-brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  min-width: 0;
  text-decoration: none;
  color: var(--paper);
}
.rail-brand:hover { color: var(--paper); }
.rail-mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: .02em;
  border-radius: 2px;
  box-shadow: 3px 3px 0 0 var(--violet);
}
.rail-brand-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.18; }
.rail-brand-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: .14em;
}
.rail-brand-line { font-size: .72rem; color: var(--mist); letter-spacing: .06em; }
.rail-brand-sub {
  margin-top: .15rem;
  font-family: var(--font-mono);
  font-size: .6rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .48rem .7rem;
  background: transparent;
  border: 1px solid var(--rail-line);
  border-radius: 2px;
  color: var(--paper);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-bars { display: inline-grid; gap: 3px; width: 1.05rem; }
.nav-toggle-bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 导航 */
.rail-nav {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding: 1rem .7rem 1rem;
  overflow-y: auto;
  scrollbar-width: thin;
}
.rail-nav-label {
  margin: 0 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
  opacity: .72;
}
.rail-list { margin: 0; padding: 0; list-style: none; display: grid; gap: .18rem; }
.rail-list a {
  position: relative;
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .55rem .6rem;
  border-left: 2px solid transparent;
  border-radius: 0 2px 2px 0;
  text-decoration: none;
  color: var(--mist);
  transition: color .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
}
.rail-num {
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .08em;
  color: var(--mist);
  opacity: .55;
  transition: color .2s var(--ease), opacity .2s var(--ease);
}
.rail-label {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: .06em;
}
.rail-list a:hover {
  color: var(--paper);
  background: rgba(31, 240, 210, .07);
  border-left-color: rgba(31, 240, 210, .5);
}
.rail-list a:hover .rail-num { color: var(--cyan); opacity: 1; }
.rail-list a[aria-current="page"] {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(31, 240, 210, .16), rgba(31, 240, 210, .02) 72%, transparent);
}
.rail-list a[aria-current="page"] .rail-num { color: var(--orange); opacity: 1; }

.rail-cta {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rail-line);
}
.rail-cta .btn { width: 100%; font-size: .92rem; padding: .6rem .7rem; }

/* 轨道底部 · 滚动进度 */
.rail-foot {
  padding: .85rem 1rem 1.15rem;
  background: var(--ink-2);
  border-top: 1px solid var(--rail-line);
  display: flex;
  flex-direction: column;
  gap: .6rem;
}
.rail-progress {
  position: relative;
  height: 3px;
  width: 100%;
  background: var(--rail-line);
  overflow: hidden;
}
.rail-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}
.rail-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .6rem;
  line-height: 1.7;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--mist);
}

/* 桌面：内容画布让出轨道宽度 */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }
}

/* ==========================================================================
   页脚 · 纸张叠层
   ========================================================================== */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 6vw, 6rem);
  padding: clamp(2rem, 4vw, 3.25rem) clamp(1rem, 3vw, 2.5rem) 1rem;
  background: var(--ink-2);
  border-top: 1px solid var(--rail-line);
  overflow: hidden;
}
.foot-sheets { position: absolute; inset: 0; pointer-events: none; }
.foot-sheets span {
  position: absolute;
  display: block;
  border: 1px solid rgba(232, 223, 201, .2);
}
.foot-sheets span:nth-child(1) {
  top: 1.2rem;
  right: -2.5rem;
  width: 14rem;
  height: 9rem;
  transform: rotate(-6deg);
  background: rgba(232, 223, 201, .035);
}
.foot-sheets span:nth-child(2) {
  bottom: 2.4rem;
  left: -3rem;
  width: 11rem;
  height: 7rem;
  transform: rotate(4deg);
  border-color: rgba(139, 108, 255, .32);
}
.foot-sheets span:nth-child(3) {
  top: 38%;
  right: 24%;
  width: 6rem;
  height: 6rem;
  transform: rotate(12deg);
  border-color: rgba(31, 240, 210, .28);
}

.foot-top {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 78rem;
  margin: 0 auto;
}
.foot-brand { display: flex; flex-direction: column; gap: .7rem; max-width: 27rem; }
.foot-brand-mark {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  align-self: flex-start;
  text-decoration: none;
  color: var(--paper);
}
.foot-brand-mark:hover { color: var(--paper); }
.foot-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  background: var(--paper-2);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 800;
  letter-spacing: .02em;
  border-radius: 2px;
  box-shadow: 2px 2px 0 var(--orange);
}
.foot-brand-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: .1em;
}
.foot-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}
.foot-summary { margin: 0; color: var(--mist); font-size: .95rem; line-height: 1.7; }

.foot-contact {
  display: grid;
  gap: .4rem;
  margin-top: .3rem;
  padding: .75rem .85rem;
  background: rgba(232, 223, 201, .04);
  border: 1px solid var(--rail-line);
  border-left: 3px solid var(--orange);
  border-radius: 0 2px 2px 0;
}
.foot-contact-row {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  margin: 0;
  font-size: .85rem;
  line-height: 1.6;
}
.foot-contact-key {
  flex: 0 0 2.4rem;
  font-family: var(--font-mono);
  font-size: .58rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
}
.foot-contact-val { color: var(--paper); }
.foot-contact-val.num { font-size: .8rem; }

.foot-col-title {
  margin: 0 0 .65rem;
  padding-bottom: .45rem;
  border-bottom: 1px solid var(--rail-line);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--paper);
}
.foot-col ul { display: grid; gap: .45rem; margin: 0; padding: 0; list-style: none; }
.foot-col a {
  display: inline-block;
  color: var(--mist);
  font-size: .92rem;
  text-decoration: none;
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.foot-col a:hover { color: var(--cyan); transform: translateX(3px); }

.foot-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  max-width: 78rem;
  margin: clamp(1.75rem, 3vw, 2.5rem) auto 0;
  padding-top: 1rem;
  border-top: 1px solid var(--rail-line);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .08em;
  color: var(--mist);
}
.foot-base p { margin: 0; }
.foot-copy { color: var(--mist); }
.foot-icp { color: var(--paper-2); }
.foot-note { opacity: .8; }

@media (min-width: 820px) {
  .foot-top { grid-template-columns: 1.6fr repeat(3, minmax(0, 1fr)); gap: 2rem 1.6rem; }
}

/* ==========================================================================
   平板与手机
   ========================================================================== */
@media (max-width: 1023px) {
  .site-rail {
    position: sticky;
    top: 0;
    inset: auto;
    width: 100%;
    height: auto;
    flex-direction: row;
    flex-wrap: wrap;
    background: rgba(8, 16, 43, .97);
    border-right: 0;
    border-bottom: 1px solid var(--rail-line);
  }
  .site-rail::after { display: none; }
  .rail-top {
    width: 100%;
    padding: .6rem .85rem;
    border-bottom: 0;
  }
  .rail-brand-name { font-size: 1.2rem; }
  .rail-brand-line { font-size: .66rem; }
  .rail-brand-sub { font-size: .55rem; }
  .nav-toggle { display: inline-flex; }

  .rail-nav {
    position: fixed;
    inset: 0;
    z-index: 55;
    width: 100%;
    height: 100dvh;
    padding: 4.6rem 1rem 2rem;
    gap: 1rem;
    background: var(--ink-2);
    border-right: 0;
    transform: translateY(-102%);
    transition: transform .34s var(--ease);
    overflow-y: auto;
  }
  .rail-nav[data-open="true"] { transform: translateY(0); }
  .rail-nav-label { margin-left: .7rem; font-size: .62rem; }
  .rail-list { gap: .3rem; }
  .rail-list a { padding: .72rem .7rem; }
  .rail-label { font-size: 1.12rem; }
  .rail-cta { margin-top: 1.25rem; }
  .rail-foot { display: none; }
}

@media (max-width: 480px) {
  .rail-brand-line { display: none; }
  .nav-toggle-text { display: none; }
  .foot-contact-key { flex-basis: 2rem; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .card:hover,
  .foot-col a:hover { transform: none; }
}