/* ==========================================================================
   YUN赛事 · 全站共享样式  /assets/site.css
   轨道导航 + 深墨绿场地底色 + 亮橙/电光蓝数据强调
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --ink-night: #061A14;
  --ink-deep: #0C2E23;
  --ink-mid: #14493A;
  --ink-soft: #1F6B52;
  --flame: #FF6B1A;
  --flame-mist: #FF9A4D;
  --volt: #3DDCFF;
  --warm: #F6F2E9;
  --mist: #A9C0B6;
  --mint: #E8FBF6;

  --line: rgba(31, 107, 82, 0.55);
  --line-soft: rgba(31, 107, 82, 0.3);
  --line-volt: rgba(61, 220, 255, 0.35);

  --rail-w: 96px;
  --bar-h: 62px;
  --maxw: 1180px;
  --gutter: clamp(1.15rem, 4vw, 2.75rem);

  --r-lg: 22px;
  --r-md: 14px;
  --r-sm: 8px;

  --font-display: "Arial Narrow", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.25, 1);
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

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

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

a { color: inherit; text-decoration: none; }

[hidden] { display: none !important; }

/* ---------- 3. 基础排版与页面底色 ---------- */
body {
  min-height: 100vh;
  padding-block-start: var(--bar-h);
  padding-inline-start: 0;
  background-color: var(--ink-deep);
  background-image:
    radial-gradient(1100px 620px at 84% -14%, rgba(61, 220, 255, 0.10), transparent 62%),
    radial-gradient(900px 520px at 4% 6%, rgba(255, 107, 26, 0.09), transparent 60%);
  background-repeat: no-repeat;
  color: var(--warm);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-stretch: 90%;
}

h1 { font-size: clamp(2.6rem, 6.4vw, 6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 1.7vw, 1.5rem); }
h4 { font-size: 1.05rem; }

::selection {
  background: var(--flame);
  color: var(--ink-night);
}

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

#main-content { scroll-margin-top: calc(var(--bar-h) + 1rem); }

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

/* ---------- 4. 跳转链 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  background: var(--flame);
  color: var(--ink-night);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1.2;
  transform: translateY(-180%);
  transition: transform 0.18s var(--ease);
}

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

/* ---------- 5. 头部：移动端顶部横条 + 侧滑抽屉 ---------- */
.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  z-index: 90;
  height: var(--bar-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-inline: 1rem;
  background: rgba(6, 26, 20, 0.95);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.24rem;
  border-radius: var(--r-md);
}

.brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--ink-night);
  background: var(--flame);
  padding: 0.3rem 0.48rem;
  border-radius: 6px 14px 6px 14px;
  transition: background-color 0.18s var(--ease);
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.96rem;
  letter-spacing: 0.05em;
  color: var(--warm);
}

.brand:hover .brand__mark { background: var(--flame-mist); }

/* 移动端抽屉 */
.rail__nav {
  position: fixed;
  inset-block: var(--bar-h) 0;
  inset-inline-start: 0;
  z-index: 88;
  width: min(84vw, 340px);
  padding: 1.1rem 1rem 2.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  background: var(--ink-night);
  border-inline-end: 1px solid var(--line);
  overflow-y: auto;
  counter-reset: rail;
  transform: translateX(-104%);
  transition: transform 0.22s var(--ease);
}

.site-header[data-open] .rail__nav {
  transform: translateX(0);
  box-shadow: 26px 0 60px rgba(0, 0, 0, 0.5);
}

.rail__link {
  position: relative;
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.7rem 0.6rem;
  border-radius: 12px;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--mist);
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.rail__link::before {
  counter-increment: rail;
  content: counter(rail, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
  transition: color 0.18s var(--ease);
}

.rail__link:hover {
  color: var(--warm);
  background: var(--ink-mid);
  transform: translateX(2px);
}

.rail__link:hover::before { color: var(--flame-mist); }

.rail__link[aria-current="page"] {
  color: var(--warm);
  background: linear-gradient(90deg, rgba(255, 107, 26, 0.2), rgba(255, 107, 26, 0) 78%);
  box-shadow: inset 2px 0 0 var(--flame);
}

.rail__link[aria-current="page"]::before { color: var(--flame); }

.rail__cta {
  margin-top: 0.8rem;
  display: block;
  text-align: center;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--flame);
  color: var(--ink-night);
  font-weight: 700;
  font-size: 0.88rem;
  line-height: 1.3;
  transition: background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.rail__cta:hover {
  background: var(--flame-mist);
  transform: translateY(-2px);
}

.rail__foot { display: none; }

/* 汉堡按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--ink-soft);
  border-radius: 999px;
  color: var(--warm);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-toggle:hover { border-color: var(--volt); color: var(--volt); }

.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background-color 0.18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 0.18s var(--ease), top 0.18s var(--ease);
}

.nav-toggle__bars::before { top: -5px; }
.nav-toggle__bars::after { top: 5px; }

.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* ---------- 6. 头部：桌面端侧边坐标轨道 ---------- */
@media (min-width: 900px) {
  body {
    padding-block-start: 0;
    padding-inline-start: var(--rail-w);
  }

  #main-content { scroll-margin-top: 2rem; }

  .site-header {
    top: 0;
    bottom: 0;
    inset-inline: 0 auto;
    height: auto;
    width: var(--rail-w);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 1.15rem;
    padding: 1.15rem 0.6rem 1rem;
    background: linear-gradient(180deg, var(--ink-night), #041410 68%, #061A14);
    border-bottom: 0;
    border-inline-end: 1px solid var(--line);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .brand-lockup { justify-content: center; }

  .brand {
    flex-direction: column;
    gap: 0.45rem;
    width: 100%;
    padding: 0.55rem 0.2rem;
    text-align: center;
  }

  .brand__mark { font-size: 1.12rem; }
  .brand__name { font-size: 0.76rem; letter-spacing: 0.1em; }

  .rail__nav {
    position: static;
    width: auto;
    padding: 0;
    gap: 0.28rem;
    background: transparent;
    border-inline-end: 0;
    overflow: visible;
    transform: none;
    transition: none;
  }

  .rail__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
    padding: 0.55rem 0.5rem;
    font-size: 0.82rem;
    line-height: 1.28;
  }

  .rail__link:hover { transform: translateY(-1px); }

  .rail__link[aria-current="page"] {
    background: linear-gradient(90deg, rgba(255, 107, 26, 0.22), rgba(255, 107, 26, 0) 78%);
  }

  .rail__cta {
    margin-top: 0.6rem;
    padding: 0.7rem 0.35rem;
    font-size: 0.78rem;
    border-radius: 14px;
  }

  .nav-toggle { display: none; }

  .rail__foot {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    gap: 0.7rem;
  }

  .rail__progress {
    width: 3px;
    height: clamp(60px, 18vh, 160px);
    border-radius: 999px;
    background: var(--ink-soft);
    overflow: hidden;
    display: flex;
    align-items: flex-start;
  }

  .rail__progress-bar {
    display: block;
    width: 100%;
    height: 0;
    background: linear-gradient(180deg, var(--volt), var(--flame));
    transition: height 0.12s linear;
  }

  .rail__top {
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    color: var(--mist);
    padding: 0.7rem 0.36rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
  }

  .rail__top:hover {
    color: var(--flame);
    border-color: var(--flame);
  }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 6vw, 6rem);
  padding-block: clamp(2.5rem, 5vw, 4rem) 1.6rem;
  background: var(--ink-night);
  border-top: 1px solid var(--line);
  color: var(--mist);
}

.footer-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 3rem);
}

.footer-brand__mark {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  line-height: 1;
  letter-spacing: 0.05em;
  color: var(--flame);
  border: 1px solid var(--flame);
  padding: 0.4rem 0.6rem;
  border-radius: 6px 16px 6px 16px;
}

.footer-brand__name {
  margin-top: 0.85rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--warm);
}

.footer-lede {
  margin-top: 0.55rem;
  max-width: 34ch;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--mist);
}

.footer-col__title {
  margin-bottom: 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--volt);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.footer-list a {
  display: inline-block;
  font-size: 0.94rem;
  color: var(--mist);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-list a:hover {
  color: var(--warm);
  transform: translateX(3px);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-contact__row {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.footer-contact__val {
  font-size: 0.94rem;
  color: var(--warm);
  word-break: break-word;
}

.footer-contact__val--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.footer-base {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: 1.4rem;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.footer-base__icp { color: var(--flame-mist); }
.footer-base__note { color: var(--ink-soft); }

@media (min-width: 720px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 1080px) {
  .footer-grid { grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr; }
}

/* ---------- 8. 布局容器与区块 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--wide { max-width: 1380px; }

.section { padding-block: clamp(3rem, 7vw, 6.5rem); }

.section + .section { border-top: 1px solid var(--line-soft); }

.section--tight { padding-block: clamp(1.6rem, 4vw, 3rem); }

.grid {
  display: grid;
  gap: clamp(1rem, 2.2vw, 1.75rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.grid--index { grid-template-columns: repeat(auto-fit, minmax(168px, 1fr)); }

/* ---------- 9. 通用文本组件 ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--volt);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.eyebrow--flame { color: var(--flame); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.58rem;
  border: 1px solid var(--ink-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.tag--flame {
  color: var(--flame);
  border-color: rgba(255, 107, 26, 0.5);
}

.stat {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  letter-spacing: 0.02em;
  color: var(--flame);
  line-height: 1.1;
}

.stat__label {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.prose {
  max-width: 68ch;
  color: rgba(246, 242, 233, 0.88);
}

.prose > p + p { margin-top: 1.05em; }

.prose h2 { margin-top: 2.1em; margin-bottom: 0.6em; }
.prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; }

.prose ul,
.prose ol {
  margin: 1.1em 0;
  padding-left: 1.05em;
}

.prose li {
  position: relative;
  margin-block: 0.45em;
  padding-left: 0.95em;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.42em;
  height: 0.42em;
  background: var(--flame);
  border-radius: 1px;
}

.prose ol { list-style: decimal; }
.prose ol li { padding-left: 0.2em; }

.prose a {
  color: var(--volt);
  text-decoration: underline;
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

.prose strong { color: var(--warm); }

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.35rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1;
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease),
    color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.btn--flame {
  background: var(--flame);
  color: var(--ink-night);
}

.btn--flame:hover {
  background: var(--flame-mist);
  transform: translateY(-2px);
}

.btn--volt {
  background: var(--volt);
  color: var(--ink-night);
}

.btn--volt:hover {
  background: var(--warm);
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--ink-soft);
  color: var(--warm);
}

.btn--ghost:hover {
  border-color: var(--volt);
  color: var(--volt);
  transform: translateY(-2px);
}

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-inline: 0.5rem;
  color: var(--ink-soft);
}

.breadcrumb a { transition: color 0.18s var(--ease); }
.breadcrumb a:hover { color: var(--volt); }
.breadcrumb [aria-current="page"] { color: var(--flame); }

/* ---------- 12. 内容卡片 ---------- */
.card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: clamp(1.1rem, 2.2vw, 1.75rem);
  background: var(--ink-mid);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-3px);
  border-color: var(--flame);
  background: #17513F;
}

.card__kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--volt);
}

.card__title {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--warm);
}

.card__text {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--mist);
}

.card__meta {
  margin-top: auto;
  padding-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

/* ---------- 13. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, var(--ink-mid), var(--ink-deep) 62%, #0A241C);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(31, 107, 82, 0.18) 1px, transparent 1px),
    linear-gradient(rgba(31, 107, 82, 0.18) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none;
}

.media-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }

.media-frame__cap {
  position: absolute;
  z-index: 2;
  inset-inline: 0;
  bottom: 0;
  padding: 0.75rem 0.95rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--warm);
  background: linear-gradient(to top, rgba(6, 26, 20, 0.92), rgba(6, 26, 20, 0));
}

/* ---------- 14. 浅色说明页分区（数据保护 / 使用说明） ---------- */
.panel-light {
  background: var(--mint);
  color: var(--ink-night);
  border-radius: var(--r-lg);
  padding: clamp(1.2rem, 3vw, 2.4rem);
}

.panel-light a { color: #0A5C4A; text-decoration: underline; text-underline-offset: 0.2em; }

/* ---------- 15. 减少动态效果 ---------- */
@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;
  }
}