/* ==========================================================================
   完美体育站 / assets/site.css
   共享外壳：reset、变量、中文排版、侧轨导航、页脚、通用组件
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body, h1, h2, h3, h4, p, figure, blockquote, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #061822;
  --ink-deep: #04121a;
  --panel: #0C2633;
  --line: #1D4452;
  --cyan: #35F0D0;
  --orange: #FF7A1A;
  --silver: #C7D4DB;
  --paper: #E9EEF0;
  --text: #F4FBFD;
  --muted: #9CB1BC;
  --danger: #FF5D6C;

  --rail-w: 76px;
  --topbar-h: 58px;
  --wrap: 1240px;

  --font-display: "HarmonyOS Sans SC Condensed", "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-body: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", SFMono-Regular, Consolas, monospace;

  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(29, 68, 82, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 68, 82, .22) 1px, transparent 1px);
  background-size: 72px 72px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--text);
}
h1 { font-size: clamp(2.5rem, 4.8vw, 4.5rem); line-height: 1.04; letter-spacing: -.02em; }
h2 { font-size: clamp(1.75rem, 2.8vw, 2.5rem); }
h3 { font-size: 1.25rem; line-height: 1.4; font-weight: 700; }

p { max-width: 68ch; }
strong { color: var(--text); font-weight: 700; }
small { font-size: .8125rem; line-height: 1.55; }

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

:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  transform: translateY(-220%);
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: .7em 1.1em;
  border: 1px solid var(--ink);
  transition: transform .22s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: none;
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

/* ---------- 5. 侧边轨道头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--rail-w);
  z-index: 80;
  background: linear-gradient(180deg, #08202c 0%, #04121a 100%);
  border-right: 1px solid var(--line);
}

.rail {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  padding: 16px 0 14px;
  gap: 12px;
}

.rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 4px 0;
  flex: none;
}

.brand-mark {
  position: relative;
  width: 20px;
  height: 20px;
  flex: none;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--cyan);
  opacity: .85;
}

.brand-name {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: .8125rem;
  letter-spacing: .22em;
  color: var(--text);
  white-space: nowrap;
}

/* 移动端开关按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  background: rgba(12, 38, 51, .85);
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  border-radius: 2px;
  z-index: 3;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
  height: 14px;
}
.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background: currentColor;
  transition: transform .26s var(--ease), opacity .2s linear;
}
.nav-toggle[data-open] {
  color: var(--cyan);
  border-color: var(--cyan);
}
.nav-toggle[data-open] .nav-toggle__bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[data-open] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[data-open] .nav-toggle__bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 导航本体：桌面竖向展览轨道 */
.site-nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  padding-bottom: 2px;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }

.site-nav__list {
  margin-block: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 100%;
}

.site-nav__item { width: 100%; display: flex; justify-content: center; }

.site-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 8px 5px;
  color: var(--muted);
  font-size: .8125rem;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--cyan);
  background: rgba(53, 240, 208, .08);
}
.site-nav__link[aria-current="page"] {
  color: var(--cyan);
}
.site-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 2px;
  background: var(--cyan);
}

.site-nav__index {
  display: none;
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .1em;
  color: rgba(156, 177, 188, .55);
}
.site-nav__link:hover .site-nav__index,
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--cyan); }

.site-nav__label {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: .16em;
  white-space: nowrap;
}

.site-nav__meta {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .1em;
  color: var(--cyan);
  opacity: .78;
  max-width: none;
  white-space: nowrap;
}

.rail-cta {
  writing-mode: vertical-rl;
  text-orientation: upright;
  flex: none;
  display: block;
  padding: 14px 9px;
  background: var(--orange);
  color: var(--ink);
  border: 1px solid var(--orange);
  border-radius: 2px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .8125rem;
  letter-spacing: .14em;
  line-height: 1;
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}
.rail-cta:hover,
.rail-cta:focus-visible {
  background: #ff9243;
  transform: translateY(-1px);
}

/* 滚动进度 */
.rail-progress {
  position: absolute;
  top: 0;
  bottom: 0;
  right: -1px;
  width: 2px;
  background: rgba(53, 240, 208, .1);
  pointer-events: none;
}
.rail-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--cyan);
  transform: scaleY(var(--p, 0));
  transform-origin: top center;
  transition: transform .12s linear;
}

/* 桌面内容避让轨道 */
@media (min-width: 960px) {
  body { padding-left: var(--rail-w); }
}

/* 矮屏压缩轨道 */
@media (min-width: 960px) and (max-height: 900px) {
  .site-nav__link { padding: 6px 5px; font-size: .75rem; }
  .site-nav__label { letter-spacing: .12em; }
  .rail-cta { padding: 11px 8px; font-size: .75rem; }
  .rail { padding: 12px 0 10px; gap: 8px; }
  .brand-name { font-size: .75rem; letter-spacing: .18em; }
}

/* ---------- 6. 移动端：顶部短条 + 抽屉 ---------- */
@media (max-width: 959px) {
  body {
    padding-top: var(--topbar-h);
    background-attachment: scroll;
    background-size: 48px 48px;
  }

  .site-header {
    top: 0;
    right: 0;
    bottom: auto;
    left: 0;
    width: auto;
    height: var(--topbar-h);
    border-right: 0;
    border-bottom: 1px solid var(--line);
    background: #08202c;
  }

  .site-header::after {
    content: "";
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(3, 10, 15, .68);
    z-index: 1;
    opacity: 0;
    pointer-events: none;
    transition: opacity .28s var(--ease);
  }
  .site-header[data-open]::after {
    opacity: 1;
    pointer-events: auto;
  }

  .rail {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 14px;
    gap: 10px;
  }

  .rail__brand { flex-direction: row; gap: 10px; padding: 0; }
  .brand-mark { width: 16px; height: 16px; }
  .brand-mark::after { inset: 4px; }
  .brand-name {
    writing-mode: horizontal-tb;
    font-size: .875rem;
    letter-spacing: .14em;
  }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: var(--topbar-h);
    right: 0;
    width: min(86vw, 340px);
    height: calc(100dvh - var(--topbar-h));
    z-index: 2;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 14px 0 22px;
    background: #08202c;
    border-left: 1px solid var(--line);
    box-shadow: -18px 0 44px rgba(3, 10, 15, .55);
    transform: translateX(103%);
    visibility: hidden;
    transition: transform .32s var(--ease), visibility .32s var(--ease);
    overflow-y: auto;
  }
  .site-nav[data-open] {
    transform: none;
    visibility: visible;
  }

  .site-nav__list {
    margin: 0;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }
  .site-nav__item { justify-content: flex-start; }
  .site-nav__link {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    width: 100%;
    padding: 14px 20px;
    border-bottom: 1px solid rgba(29, 68, 82, .65);
    font-size: 1rem;
  }
  .site-nav__link[aria-current="page"] {
    background: rgba(53, 240, 208, .07);
  }
  .site-nav__link[aria-current="page"]::before {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    width: 2px;
    height: 22px;
  }
  .site-nav__index { display: inline-block; order: -1; width: 1.6em; }
  .site-nav__label {
    writing-mode: horizontal-tb;
    letter-spacing: .06em;
    font-size: 1rem;
  }

  .site-nav__meta {
    margin: 18px 20px 0;
    font-size: .6875rem;
    letter-spacing: .14em;
  }

  .rail-cta {
    writing-mode: horizontal-tb;
    margin: 14px 20px 0;
    padding: 14px 18px;
    text-align: center;
    letter-spacing: .1em;
  }

  .rail-progress {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    height: 2px;
    background: rgba(53, 240, 208, .12);
  }
  .rail-progress__bar {
    transform: scaleX(var(--p, 0));
    transform-origin: left center;
    height: 100%;
    width: 100%;
  }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  padding: clamp(36px, 5vw, 64px) 0 22px;
  background: var(--ink-deep);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--line) 38%, transparent 72%);
}

.footer__inner { position: relative; }

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr .9fr .9fr 1.3fr;
  gap: clamp(24px, 3vw, 48px);
  padding-bottom: clamp(28px, 4vw, 46px);
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: .06em;
  color: var(--text);
  max-width: none;
}
.footer__summary {
  margin-top: 10px;
  color: var(--muted);
  font-size: .9375rem;
  max-width: 34ch;
}
.footer__note {
  margin-top: 12px;
  color: var(--muted);
  font-size: .8125rem;
  line-height: 1.7;
  max-width: 36ch;
  padding-left: 12px;
  border-left: 2px solid var(--line);
}
.footer__stamp {
  display: inline-block;
  margin-top: 16px;
  padding: .3em .7em;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  max-width: none;
}

.footer__title {
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--cyan);
  margin-bottom: 14px;
}

.footer__list { display: flex; flex-direction: column; gap: 9px; }
.footer__item { display: block; }
.footer__link {
  display: inline-block;
  font-size: .9375rem;
  color: var(--muted);
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible {
  color: var(--text);
  transform: translateX(3px);
}

.contact-list { display: flex; flex-direction: column; gap: 12px; }
.contact-list__item { display: block; }
.contact-list__label {
  display: block;
  font-family: var(--font-mono);
  font-size: .625rem;
  letter-spacing: .18em;
  color: var(--silver);
  margin-bottom: 3px;
}
.contact-list__value {
  display: block;
  font-size: .875rem;
  line-height: 1.65;
  color: var(--muted);
  word-break: break-word;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.footer__copyright,
.footer__icp,
.footer__build {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--muted);
  max-width: none;
}
.footer__icp { color: var(--silver); }
.footer__build { color: rgba(156, 177, 188, .75); }

@media (max-width: 1100px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .footer__grid { grid-template-columns: 1fr; gap: 28px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 8. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 56px);
}

.section { padding-block: clamp(40px, 6vw, 88px); }

.stack > * + * { margin-top: 1rem; }

.grid { display: grid; gap: clamp(16px, 2vw, 28px); }
.grid--split {
  grid-template-columns: minmax(0, 34fr) minmax(0, 66fr);
  align-items: start;
}
.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
@media (max-width: 860px) {
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 9. 基础组件 ---------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: .7rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--cyan);
  max-width: none;
}
.eyebrow::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}

.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.panel--paper {
  background: var(--paper);
  color: var(--ink);
  border-color: #c3d0d6;
  box-shadow: 6px 6px 0 rgba(29, 68, 82, .55);
}
.panel--paper h2,
.panel--paper h3,
.panel--paper strong { color: var(--ink); }

.card {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .3em .62em;
  border: 1px solid var(--line);
  background: rgba(199, 212, 219, .06);
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  border-radius: 2px;
}
.tag--cyan { color: var(--cyan); border-color: rgba(53, 240, 208, .45); background: rgba(53, 240, 208, .08); }
.tag--orange { color: var(--orange); border-color: rgba(255, 122, 26, .5); background: rgba(255, 122, 26, .1); }
.tag--paper { color: var(--ink); background: var(--paper); border-color: var(--paper); }

.meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--muted);
  max-width: none;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 0 rgba(53, 240, 208, .5);
  animation: status-pulse 2.4s ease-in-out infinite;
  flex: none;
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(53, 240, 208, .45); }
  50% { box-shadow: 0 0 0 6px rgba(53, 240, 208, 0); }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .6em;
  padding: .85em 1.35em;
  border: 1px solid transparent;
  border-radius: 2px;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.2;
  transition: background-color .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.btn:hover,
.btn:focus-visible { transform: translateY(-1px); }
.btn--cta { background: var(--orange); color: var(--ink); }
.btn--cta:hover,
.btn--cta:focus-visible { background: #ff9243; }
.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn--ghost:hover,
.btn--ghost:focus-visible { border-color: var(--cyan); color: var(--cyan); }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(20px, 3vw, 36px);
}

/* 面包屑 */
.breadcrumb { padding-block: 18px 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--muted);
}
.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}
.breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: var(--line);
}
.breadcrumb__link { color: var(--muted); transition: color .2s var(--ease); }
.breadcrumb__link:hover,
.breadcrumb__link:focus-visible { color: var(--cyan); }
.breadcrumb__current { color: var(--silver); }

/* 图片容器（页面阶段放赛事数据截图） */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(29, 68, 82, .55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 68, 82, .55) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .5;
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(4, 18, 26, .72) 100%);
}
.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: var(--ink-deep);
}
.media-frame__stamp {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 3;
  padding: .3em .7em;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

@media (max-width: 720px) {
  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--wide { aspect-ratio: 16 / 10; }
  .media-frame--tall { aspect-ratio: 1 / 1; }
}

/* 长文排版 */
.prose { max-width: 72ch; }
.prose p + p { margin-top: 1.1em; }
.prose h2, .prose h3 { margin-top: 1.8em; }
.prose ul, .prose ol { margin-top: 1em; padding-left: 1.25em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .4em; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 10. 显现（页面阶段给块级元素加 data-reveal） ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 11. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .rail-progress__bar { transition: none; }
}