/* ==========================================================================
   最新版体育 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   视觉母题：深海战术板 + 6°、12° 斜切 + 切角面板 + 数据发光
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body,
h1, h2, h3, h4, h5, h6, p, figure, figcaption, blockquote,
dl, dd, ul, ol { margin: 0; }

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

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

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

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

table { border-collapse: collapse; }

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

/* ---------- 2. 变量 ---------- */
:root {
  --void: #061826;
  --tactic: #0E2A3D;
  --anchor: #1B4A63;
  --cyan: #35F0C0;
  --teal: #0F7A62;
  --coral: #FF6A3D;
  --salt: #F1F7F6;
  --mist: #8CA6B3;
  --sand: #EFE5D3;
  --ink: #241A13;
  --signal: #FFC24B;

  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "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;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;

  --wrap: 1240px;
  --gutter: clamp(18px, 4vw, 48px);

  --fs-display: clamp(40px, 7.4vw, 72px);
  --fs-h1: clamp(30px, 4.6vw, 48px);
  --fs-h2: clamp(24px, 3vw, 32px);
  --fs-h3: clamp(19px, 2vw, 24px);
  --fs-body: clamp(16px, 0.35vw + 14px, 18px);
  --fs-sm: 15px;
  --fs-xs: 13px;
  --fs-xxs: 12px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-h: 118px;
}

/* ---------- 3. 中文排版基座 ---------- */
body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--salt);
  background-color: var(--void);
  background-image:
    repeating-linear-gradient(112deg, rgba(53, 240, 192, 0.018) 0 1px, transparent 1px 8px),
    repeating-linear-gradient(22deg, rgba(140, 166, 179, 0.022) 0 1px, transparent 1px 11px);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--salt);
  overflow-wrap: break-word;
}

p, li, dd, dt { overflow-wrap: break-word; }

/* ---------- 4. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: 8px;
  z-index: 200;
  transform: translateY(-180%);
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--void);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xs);
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: transform 0.18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 24, 38, 0.62);
  border-bottom: 1px solid rgba(27, 74, 99, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition:
    background-color 0.28s var(--ease),
    border-color 0.28s var(--ease),
    box-shadow 0.28s var(--ease);
}

.site-header[data-scrolled="true"] {
  background: rgba(6, 24, 38, 0.98);
  border-bottom-color: var(--anchor);
  box-shadow: 0 1px 0 rgba(53, 240, 192, 0.16);
}

.header-bar__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  min-height: 64px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}

.brand__mark {
  width: 28px;
  height: 28px;
  flex: 0 0 auto;
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 58% 100%, 0 100%);
  transition: background-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.brand:hover .brand__mark,
.brand:focus-visible .brand__mark {
  background: var(--coral);
  transform: rotate(-5deg);
}

.brand__text { display: block; }

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: var(--salt);
}

.brand__line {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  line-height: 1.2;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

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

.header-meta {
  display: none;
  padding-left: 18px;
  border-left: 1px solid var(--anchor);
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: 0.12em;
  color: var(--mist);
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 11px 18px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xs);
  letter-spacing: 0.03em;
  line-height: 1;
  color: var(--salt);
  background: transparent;
  border: 1px solid var(--anchor);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition:
    color 0.18s var(--ease),
    background-color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.btn--ghost { color: var(--salt); }

.btn--primary {
  background: var(--coral);
  border-color: var(--coral);
  color: #1a0d07;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #ff8358;
  border-color: #ff8358;
  color: #1a0d07;
}

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 10px 13px;
  border: 1px solid var(--anchor);
  color: var(--salt);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-xxs);
  letter-spacing: 0.12em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  color: var(--coral);
  border-color: var(--coral);
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 15px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(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(-5px) rotate(-45deg);
}

.nav-toggle__label { white-space: nowrap; }

/* 主导航 */
.site-nav {
  border-top: 1px solid rgba(27, 74, 99, 0.42);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-direction: column;
  align-items: stretch;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(4px, 1.1vw, 24px);
}

.nav-list__item { display: block; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 12px 2px 13px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 6px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease), background-color 0.18s var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--salt); }

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--cyan); }

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--coral);
}

.nav-foot {
  display: none;
  font-family: var(--font-mono);
  font-size: var(--fs-xxs);
  letter-spacing: 0.18em;
  color: var(--mist);
  white-space: nowrap;
}

/* 阅读进度线 */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.24s var(--ease);
}

.site-header[data-scrolled="true"] .scroll-progress { opacity: 1; }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  padding-top: clamp(40px, 6vw, 74px);
  background:
    linear-gradient(180deg, rgba(14, 42, 61, 0.62) 0%, rgba(6, 24, 38, 0.98) 62%),
    var(--void);
  border-top: 1px solid var(--anchor);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 32%, var(--teal) 62%, transparent);
  opacity: 0.55;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4.5vw, 60px);
}

.footer-brand .brand { margin-bottom: 18px; }

.brand--footer .brand__name { font-size: 19px; }

.footer-tagline {
  max-width: 34ch;
  font-family: var(--font-serif);
  font-size: clamp(17px, 1.4vw, 20px);
  line-height: 1.7;
  color: var(--salt);
}

.footer-hours {
  margin-top: 12px;
  font-size: var(--fs-xs);
  line-height: 1.8;
  color: var(--mist);
}

.footer-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.footer-col__title {
  display: inline-block;
  padding-bottom: 8px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  border-bottom: 1px solid var(--anchor);
}

.footer-col__list { display: grid; gap: 2px; }

.footer-link {
  display: inline-block;
  padding: 5px 0;
  font-size: var(--fs-sm);
  color: var(--mist);
  transition: color 0.18s var(--ease), transform 0.18s var(--ease);
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--salt);
  transform: translateX(4px);
}

.footer-contact {
  margin-top: clamp(30px, 4vw, 52px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid rgba(27, 74, 99, 0.6);
}

.footer-contact__title {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--mist);
  margin-bottom: 16px;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px 28px;
}

.contact-item { display: grid; gap: 3px; }

.contact-item dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.contact-item dd {
  margin: 0;
  font-size: var(--fs-xs);
  line-height: 1.7;
  color: var(--salt);
}

.footer-contact .footer-hours { max-width: 46ch; }

.footer-base {
  margin-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid rgba(27, 74, 99, 0.45);
}

.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 18px 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.footer-legal { color: var(--mist); }
.footer-copy { color: var(--anchor); }
.footer-copy [data-year] { color: var(--mist); }

/* ---------- 8. 通用文本组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
  flex: 0 0 auto;
}

.data-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

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

/* ---------- 9. 标签 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  line-height: 1.4;
  color: var(--mist);
  border: 1px solid var(--anchor);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.chip--cyan {
  color: var(--cyan);
  border-color: var(--teal);
  background: rgba(53, 240, 192, 0.07);
}

.chip--coral {
  color: var(--coral);
  border-color: rgba(255, 106, 61, 0.5);
  background: rgba(255, 106, 61, 0.09);
}

.chip--signal {
  color: var(--signal);
  border-color: rgba(255, 194, 75, 0.42);
  background: rgba(255, 194, 75, 0.08);
}

/* ---------- 10. 面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--tactic);
  border: 1px solid var(--anchor);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

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

.paper {
  padding: clamp(22px, 3.4vw, 44px);
  background: var(--sand);
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.paper h1,
.paper h2,
.paper h3,
.paper h4 { color: var(--ink); }

.paper a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--teal);
  text-underline-offset: 4px;
}

/* ---------- 11. 正文容器 ---------- */
.prose {
  max-width: 62ch;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: inherit;
}

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

.prose h2 {
  margin-top: 1.9em;
  font-size: var(--fs-h2);
  letter-spacing: -0.015em;
}

.prose h3 {
  margin-top: 1.6em;
  font-size: var(--fs-h3);
  letter-spacing: -0.01em;
}

.prose ul,
.prose ol {
  padding-left: 1.25em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li { margin-top: 0.45em; }

.prose li::marker { color: var(--cyan); }

.paper .prose li::marker { color: var(--teal); }

.prose a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--cyan);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 0.18s var(--ease), text-decoration-color 0.18s var(--ease);
}

.prose a:hover,
.prose a:focus-visible {
  color: var(--cyan);
  text-decoration-color: var(--coral);
}

.paper .prose a:hover,
.paper .prose a:focus-visible { color: var(--teal); }

.prose blockquote {
  padding-left: 20px;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-serif);
  font-size: clamp(18px, 1.6vw, 21px);
  line-height: 1.75;
  color: var(--mist);
}

.paper .prose blockquote {
  border-left-color: var(--teal);
  color: #4a3a2e;
}

.prose strong { font-weight: 700; }

.prose code {
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.9em;
  letter-spacing: 0.04em;
  background: rgba(53, 240, 192, 0.1);
  color: var(--cyan);
}

.paper .prose code {
  background: rgba(15, 122, 98, 0.14);
  color: #0b4f40;
}

/* ---------- 12. 图片容器（供页面阶段放置占位） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--tactic);
  border: 1px solid var(--anchor);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(53, 240, 192, 0.075) 0 1px,
    transparent 1px 16px
  );
  pointer-events: none;
}

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

.media__caption {
  position: absolute;
  z-index: 2;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 26px 16px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--salt);
  background: linear-gradient(180deg, transparent, rgba(6, 24, 38, 0.88));
}

.media--wide { aspect-ratio: 21 / 9; }
.media--portrait { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

/* ---------- 13. 面包屑 ---------- */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb__item { display: inline-flex; align-items: center; gap: 6px; }

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--anchor);
}

.breadcrumb__link {
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.breadcrumb__link:hover,
.breadcrumb__link:focus-visible { color: var(--cyan); }

.breadcrumb__item[aria-current="page"] { color: var(--salt); }

/* ---------- 14. 显现动画协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.42s var(--ease), transform 0.42s var(--ease);
}

[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 断点：平板 ---------- */
@media (min-width: 640px) {
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
}

@media (min-width: 860px) {
  .footer-main {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 2fr);
    align-items: start;
  }
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 16. 断点：桌面 ---------- */
@media (min-width: 1080px) {
  :root { --header-h: 118px; }
  .header-meta { display: block; }
  .nav-foot { display: block; }
}

@media (min-width: 900px) {
  .site-nav__inner {
    flex-direction: row;
    align-items: center;
  }
  .nav-list { gap: clamp(6px, 1.4vw, 26px); }
  .nav-link { padding: 12px 2px 14px; }
}

/* ---------- 17. 断点：移动导航 ---------- */
@media (max-width: 899px) {
  .site-header { --header-h: 112px; }

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

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    max-height: calc(100vh - 112px);
    overflow-y: auto;
    background: #082031;
    border-top: 1px solid var(--anchor);
    border-bottom: 1px solid var(--cyan);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  }

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

  .site-nav__inner {
    flex-direction: column;
    align-items: stretch;
    padding-block: 6px 16px;
  }

  .nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .nav-list__item { display: block; }

  .nav-link {
    display: block;
    width: 100%;
    padding: 15px 0;
    font-size: var(--fs-body);
    border-bottom: 1px solid rgba(27, 74, 99, 0.45);
  }

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

  .nav-link[aria-current="page"] {
    color: var(--cyan);
    border-bottom-color: var(--coral);
  }

  .nav-foot {
    display: block;
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid rgba(27, 74, 99, 0.45);
  }
}

@media (max-width: 639px) {
  .header-actions__link { display: none; }
  .header-actions .btn { padding: 10px 13px; font-size: 12px; }
  .brand__name { font-size: 16px; }
  .contact-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 409px) {
  .brand__line { display: none; }
  .btn--primary { font-size: 11px; }
}

/* ---------- 18. 减少动态偏好 ---------- */
@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}