/* =========================================================
   九游赛场 · 共享样式 /assets/site.css
   战术板 × 计分屏：深墨绿基底、精密细线、八个项目色标
   ========================================================= */

/* ---------- 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, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; }
ul[class], ol[class] { list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { text-wrap: balance; }
p { text-wrap: pretty; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B2B26;
  --panel: #123E36;
  --panel-deep: #0E322C;
  --cyan: #35F2D0;
  --orange: #FF8A3D;
  --gold: #F2D27A;
  --mint: #82E0B8;
  --coral: #FF6B5E;
  --violet: #7B8CFF;
  --sky: #58C8E8;
  --mist: #EAF4EF;
  --sage: #8FA79F;

  --line: rgba(143, 167, 159, 0.24);
  --line-strong: rgba(143, 167, 159, 0.46);
  --glow: rgba(53, 242, 208, 0.16);

  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", system-ui, sans-serif;
  --font-display: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Courier New", monospace;

  --radius: 2px;
  --maxw: 1280px;
  --gutter: clamp(16px, 4vw, 44px);
  --header-h: 76px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink);
  background-image:
    radial-gradient(1200px 520px at 78% -8%, rgba(53, 242, 208, 0.07), transparent 70%),
    radial-gradient(900px 460px at 4% 4%, rgba(123, 140, 255, 0.06), transparent 72%);
  background-repeat: no-repeat;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: .01em;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--mist);
}

h1 { font-size: clamp(2.3rem, 5.6vw, 4.4rem); letter-spacing: -.03em; }
h2 { font-size: clamp(1.5rem, 2.8vw, 2.2rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.4rem); font-weight: 400; }
h4 { font-size: 1.02rem; font-weight: 600; letter-spacing: .02em; }

p { margin: 0 0 1.05em; }
p:last-child { margin-bottom: 0; }

a { transition: color .16s var(--ease), opacity .16s var(--ease); }
a:hover { color: var(--cyan); }

strong, b { font-weight: 600; color: var(--mist); }

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

::selection { background: var(--cyan); color: #06231F; }

[hidden] { display: none !important; }

/* ---------- 4. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(44px, 6.5vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 10px 32px;
  padding-bottom: 16px;
  margin-bottom: clamp(20px, 3vw, 38px);
  border-bottom: 1px solid var(--line);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .04em;
}

/* ---------- 5. 文字组件 ---------- */
.eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.index-num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--sage);
}

.lede {
  font-size: clamp(1.02rem, 1.5vw, 1.16rem);
  line-height: 1.78;
  color: var(--sage);
  max-width: 38em;
  margin: 0;
}

.prose { max-width: 40em; }
.prose > * + * { margin-top: 1.05em; }
.prose h2, .prose h3 { margin-top: 2em; margin-bottom: .5em; }
.prose ul, .prose ol { padding-left: 1.25em; margin: 0 0 1.05em; }
.prose li { margin-bottom: .4em; }
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(53, 242, 208, .4); }
.prose a:hover { border-bottom-color: var(--cyan); }

/* ---------- 6. 项目色标 ---------- */
[data-project="football"]   { --proj: #35F2D0; }
[data-project="basketball"] { --proj: #FF8A3D; }
[data-project="volleyball"] { --proj: #F2D27A; }
[data-project="badminton"]  { --proj: #82E0B8; }
[data-project="tabletennis"]{ --proj: #FF6B5E; }
[data-project="track"]      { --proj: #7B8CFF; }
[data-project="swim"]       { --proj: #58C8E8; }
[data-project="cup"]        { --proj: #EAF4EF; }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: .08em;
  line-height: 1.2;
  cursor: pointer;
  transition: transform .16s var(--ease), background-color .16s var(--ease),
              border-color .16s var(--ease), color .16s var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary { background: var(--cyan); color: #06231F; }
.btn--primary:hover { background: #6BF8DF; color: #06231F; }

.btn--orange { background: var(--orange); color: #231004; }
.btn--orange:hover { background: #FFA268; color: #231004; }

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

/* ---------- 8. 标签 / 卡片 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(18, 62, 54, .72);
  color: var(--mist);
  white-space: nowrap;
}

.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--proj, var(--cyan));
  flex: 0 0 auto;
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 2.2vw, 28px);
  transition: transform .16s var(--ease), border-color .16s var(--ease),
              box-shadow .16s var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--proj, var(--cyan));
  box-shadow: 0 14px 30px rgba(0, 0, 0, .3);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .08em;
  color: var(--sage);
}

.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--line-strong);
}
.breadcrumb a { color: var(--sage); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb [aria-current="page"] { color: var(--mist); }

/* ---------- 10. 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--panel);
  background-image: linear-gradient(155deg, rgba(18, 62, 54, .95), rgba(11, 43, 38, 1) 68%, rgba(53, 242, 208, .12));
}

.media > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--thumb { aspect-ratio: 3 / 2; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }

.media__scrim {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 43, 38, 0) 42%, rgba(11, 43, 38, .9) 100%);
}

.media__badge {
  position: absolute;
  left: 12px;
  bottom: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--mist);
  background: rgba(11, 43, 38, .88);
  border: 1px solid var(--proj, var(--cyan));
  border-radius: var(--radius);
}

.media__badge::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--proj, var(--cyan));
}

/* ---------- 11. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 300;
  padding: 11px 20px;
  background: var(--cyan);
  color: #06231F;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .08em;
  border-radius: var(--radius);
  transition: top .16s var(--ease);
}

.skip-link:focus {
  top: 14px;
  color: #06231F;
}

/* ---------- 12. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 22%, var(--cyan) 78%, transparent);
  opacity: .38;
  pointer-events: none;
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
  z-index: 2;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--mint) 55%, var(--gold));
  transition: transform .1s linear;
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: var(--header-h);
}

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 0;
  flex: 0 0 auto;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: .16em;
  line-height: 1.1;
  color: var(--mist);
  transition: color .16s var(--ease);
}

.brand__mark::after {
  content: "";
  width: 6px;
  height: 6px;
  margin-left: 10px;
  background: var(--cyan);
  flex: 0 0 auto;
}

.brand:hover .brand__mark { color: var(--cyan); }

.brand__line {
  font-size: .67rem;
  letter-spacing: .12em;
  color: var(--sage);
  line-height: 1.4;
}

/* 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--mist);
  font-size: .76rem;
  letter-spacing: .16em;
  cursor: pointer;
  flex: 0 0 auto;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

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

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform .16s var(--ease), opacity .16s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(4px, 1.4vw, 26px);
  flex: 1 1 auto;
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0px, .9vw, 10px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 11px 10px;
  font-size: .92rem;
  letter-spacing: .05em;
  color: var(--mist);
  white-space: nowrap;
  transition: color .16s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 4px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .16s var(--ease);
}

.nav-link:hover { color: var(--cyan); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  height: 2px;
}

.nav-utility {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(8px, 1.4vw, 20px);
  border-left: 1px solid var(--line);
  flex: 0 0 auto;
}

.nav-utility a {
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--sage);
  white-space: nowrap;
}

.nav-utility a:hover { color: var(--gold); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  margin-top: clamp(40px, 6vw, 88px);
  background: var(--panel-deep);
  border-top: 1px solid var(--line);
  color: var(--mist);
  position: relative;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--mint), var(--gold), var(--orange), var(--coral), var(--violet), var(--sky));
  opacity: .55;
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.95fr);
  gap: clamp(32px, 5vw, 76px);
  padding-block: clamp(40px, 6vw, 78px);
}

.footer-brand { min-width: 0; }

.footer-brand__mark {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--mist);
}

.footer-brand__mark:hover { color: var(--cyan); }

.footer-brand__domain {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--cyan);
  opacity: .8;
}

.footer-summary {
  margin-top: 16px;
  max-width: 34ch;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--sage);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 44px);
  min-width: 0;
}

.footer-col { min-width: 0; }

.footer-col__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--gold);
  line-height: 1.4;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-links a {
  font-size: .92rem;
  color: var(--mist);
  opacity: .84;
}

.footer-links a:hover { color: var(--cyan); opacity: 1; }

.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.footer-contact li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--sage);
}

.footer-contact__val {
  font-size: .9rem;
  line-height: 1.65;
  color: var(--mist);
  opacity: .86;
  word-break: break-word;
}

.footer-version {
  background: rgba(11, 43, 38, .58);
  border-top: 1px solid var(--line);
}

.footer-version__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-block: 16px;
}

.footer-version__note {
  margin: 0;
  max-width: 78ch;
  font-size: .78rem;
  line-height: 1.7;
  letter-spacing: .03em;
  color: var(--sage);
}

.footer-version__tag {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--cyan);
  border: 1px solid rgba(53, 242, 208, .34);
  border-radius: var(--radius);
  padding: 3px 10px;
  white-space: nowrap;
}

.footer-meta {
  border-top: 1px solid var(--line);
  background: rgba(11, 43, 38, .78);
}

.footer-meta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px;
}

.footer-copy,
.footer-icp {
  margin: 0;
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--sage);
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: .08em;
}

/* ---------- 14. 显现动画 ---------- */
html.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

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

/* ---------- 15. 断点 ---------- */
@media (max-width: 1080px) {
  .nav-link { padding: 11px 7px; font-size: .88rem; }
  .nav-link::after { left: 7px; right: 7px; }
  .brand__line { display: none; }
}

@media (max-width: 960px) {
  :root { --header-h: 64px; }

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

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 10px var(--gutter) 22px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 26px 48px rgba(0, 0, 0, .5);
    animation: navDrop .16s var(--ease);
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

  .site-nav[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
  }

  .nav-list li + li { border-top: 1px solid var(--line); }

  .nav-link {
    display: block;
    padding: 14px 6px 14px 18px;
    font-size: 1rem;
    letter-spacing: .06em;
  }

  .nav-link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 14px;
    margin-top: -7px;
    background: var(--line-strong);
    transition: background-color .16s var(--ease), height .16s var(--ease);
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] { background: rgba(53, 242, 208, .07); }
  .nav-link[aria-current="page"]::before {
    background: var(--cyan);
    height: 22px;
    margin-top: -11px;
  }

  .nav-list li:nth-child(1) .nav-link::before { background-color: var(--cyan); }
  .nav-list li:nth-child(2) .nav-link::before { background-color: var(--gold); }
  .nav-list li:nth-child(3) .nav-link::before { background-color: var(--orange); }
  .nav-list li:nth-child(4) .nav-link::before { background-color: var(--violet); }
  .nav-list li:nth-child(5) .nav-link::before { background-color: var(--mint); }
  .nav-list li:nth-child(6) .nav-link::before { background-color: var(--coral); }

  .nav-utility {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 14px 0 0;
    margin-top: 8px;
  }

  .nav-utility a {
    display: block;
    padding: 9px 6px 9px 18px;
    font-size: .82rem;
  }

  .footer-inner { grid-template-columns: minmax(0, 1fr); }
  .footer-summary { max-width: 46ch; }
}

@keyframes navDrop {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 900px) {
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col--contact { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .grid--12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .section__head { align-items: flex-start; }
  .footer-version__inner { flex-direction: column; align-items: flex-start; }
  .footer-meta__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 620px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .footer-col--contact { grid-column: auto; }
  .brand__mark { font-size: 1.15rem; letter-spacing: .12em; }
  .btn { width: 100%; }
}

@media (max-width: 420px) {
  .grid--12 { grid-template-columns: minmax(0, 1fr); }
  .nav-toggle__label { display: none; }
}

/* ---------- 16. 减少动态偏好 ---------- */
@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;
  }

  .btn:hover,
  .card:hover { transform: none; }

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