/* =========================================================
   体验体育 · 共享样式表 /assets/site.css
   深空黑画布 + 荧光绿锚点 + 精密网格 + 胶囊浮岛导航
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --ink: #0A0C0F;
  --panel: #14181D;
  --grid: #232A31;
  --text: #F2F5F7;
  --muted: #9AA5AE;
  --green: #C6FF3D;
  --green-dark: #A8DC22;
  --green-deep: #1B2A12;
  --orange: #FF7A1A;
  --blue: #3DA9FF;

  --edge: 20px;
  --maxw: 1360px;
  --col-gap: 24px;

  --font-sans: "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui,
    -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;

  --s12: 0.75rem;
  --s15: 0.9375rem;
  --s18: 1.125rem;
  --s22: 1.375rem;
  --s28: 1.75rem;
  --s36: 2.25rem;
  --s52: 3.25rem;
  --s76: 4.75rem;

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

@media (min-width: 768px) {
  :root { --edge: 32px; }
}
@media (min-width: 1200px) {
  :root { --edge: 64px; }
}

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

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

body {
  margin: 0;
  background-color: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--s18);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 { margin: 0; line-height: 1.2; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { max-width: 100%; display: block; }
button { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; transition: color 0.2s var(--ease); }
a:hover { color: var(--green); }

#main-content { scroll-margin-top: 104px; }

/* ---------- 3. 焦点与跳转 ---------- */
:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: var(--edge);
  top: -120px;
  z-index: 200;
  display: inline-block;
  padding: 10px 18px;
  background-color: var(--green);
  color: var(--ink);
  font-size: var(--s15);
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: 2px;
  transition: top 0.2s var(--ease);
}
.skip-link:focus {
  top: 14px;
  color: var(--ink);
}

/* ---------- 4. 页头：悬浮胶囊浮岛 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 14px var(--edge) 12px;
  background-image: linear-gradient(
    180deg,
    rgba(10, 12, 15, 0.96) 0%,
    rgba(10, 12, 15, 0.78) 58%,
    rgba(10, 12, 15, 0) 100%
  );
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: padding 0.3s var(--ease);
}

.site-header.is-condensed {
  padding-top: 8px;
  padding-bottom: 8px;
}

.header-island {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 9px 10px 9px 16px;
  background-color: rgba(20, 24, 29, 0.92);
  border: 1px solid var(--grid);
  border-radius: 999px;
  transition: border-color 0.3s var(--ease), background-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.site-header.is-condensed .header-island {
  padding-top: 6px;
  padding-bottom: 6px;
  border-color: #2B333C;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  min-width: 0;
}
.brand:hover { color: var(--text); }

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  background-color: var(--green);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: var(--s15);
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: 2px;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}
.brand-name {
  font-size: var(--s15);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text);
}
.brand-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 13px;
  font-size: var(--s15);
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-radius: 999px;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.nav-link:hover {
  color: var(--text);
  background-color: rgba(242, 245, 247, 0.06);
}
.nav-link[aria-current="page"] {
  color: var(--green);
}
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 2px;
  height: 1px;
  background-color: var(--green);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 10px;
  padding-left: 12px;
  border-left: 1px solid var(--grid);
}
.nav-actions .btn { border-radius: 999px; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 15px;
  background-color: transparent;
  border: 1px solid var(--grid);
  border-radius: 999px;
  color: var(--text);
  font-size: var(--s15);
  font-weight: 600;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}
.nav-toggle:hover {
  border-color: var(--green);
  color: var(--green);
}
.nav-toggle-lines {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
  flex: 0 0 auto;
}
.nav-toggle-lines i {
  display: block;
  height: 1.5px;
  background-color: currentColor;
  transition: transform 0.25s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-lines i:first-child {
  transform: translateY(2.75px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-lines i:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  display: block;
  height: 2px;
  background-color: var(--green);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 130px);
  background-color: var(--ink);
  border-top: 1px solid var(--grid);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 96px;
  height: 1px;
  background-color: var(--green);
}

.footer-shell {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) var(--edge) 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.1fr 2fr; gap: 48px; }
}
@media (min-width: 1100px) {
  .footer-grid { grid-template-columns: 1.4fr 3fr; gap: 72px; }
}

.footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--green);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: var(--s18);
  font-weight: 700;
  border-radius: 2px;
}
.footer-title {
  margin: 16px 0 6px;
  font-size: var(--s22);
  font-weight: 700;
  letter-spacing: 0.12em;
}
.footer-line {
  font-size: var(--s15);
  color: var(--muted);
}
.footer-meta {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.footer-col-title {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.18em;
  color: var(--green);
}
.footer-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.footer-list a {
  position: relative;
  display: inline-block;
  font-size: var(--s15);
  color: var(--text);
}
.footer-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background-color: var(--green);
  transition: width 0.25s var(--ease);
}
.footer-list a:hover { color: var(--green); }
.footer-list a:hover::after { width: 100%; }

.footer-contact {
  margin-top: clamp(36px, 5vw, 56px);
}
.footer-contact-line {
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.06em;
  line-height: 2;
  color: var(--muted);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  justify-content: space-between;
  align-items: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.1em;
  color: var(--muted);
}
.footer-copy,
.footer-legal { margin: 0; }

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  background-color: transparent;
  font-family: var(--font-sans);
  font-size: var(--s15);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.22s var(--ease), color 0.22s var(--ease),
    border-color 0.22s var(--ease), transform 0.12s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background-color: var(--green);
  border-color: var(--green);
  color: var(--ink);
}
.btn-primary:hover {
  background-color: #D8FF74;
  border-color: #D8FF74;
  color: var(--ink);
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--grid);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.btn-sm {
  padding: 9px 16px;
  font-size: var(--s12);
  letter-spacing: 0.1em;
}

/* ---------- 7. 容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--edge);
  padding-right: var(--edge);
}

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

.prose {
  max-width: 38em;
  font-size: var(--s18);
  line-height: 1.75;
}
.prose p + p { margin-top: 1.1em; }
.prose strong { color: var(--text); font-weight: 700; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.1em;
  color: var(--muted);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--green); }
.breadcrumb-sep { color: var(--grid); }
.breadcrumb [aria-current="page"] { color: var(--text); }

/* ---------- 8. 章节标记与标题 ---------- */
.chapter { margin-top: clamp(52px, 8vw, 116px); }

.chapter-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(18px, 2.4vw, 30px);
}
.chapter-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.18em;
  color: var(--green);
}
.chapter-rule {
  position: relative;
  flex: 1 1 auto;
  height: 1px;
  background-color: var(--grid);
}
.chapter-rule::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 52px;
  height: 1px;
  background-color: var(--green);
}
.chapter-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.16em;
  color: var(--muted);
}

.chapter-title {
  margin-bottom: 18px;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.display {
  font-size: clamp(3.2rem, 9vw, 8rem);
  font-weight: 200;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

.lead {
  max-width: 38em;
  font-size: clamp(1rem, 1.4vw, 1.375rem);
  line-height: 1.7;
  color: var(--muted);
}

.index-label {
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.16em;
  color: var(--muted);
}

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

/* ---------- 9. 面板 / 数据条 / 表格 ---------- */
.panel {
  padding: clamp(20px, 2.4vw, 34px);
  background-color: var(--panel);
  border: 1px solid var(--grid);
  border-radius: 2px;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}
.panel:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
}
.panel-title {
  margin-bottom: 14px;
  font-size: var(--s18);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.data-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 30px;
  padding: 16px 0;
  border-top: 1px solid var(--grid);
  border-bottom: 1px solid var(--grid);
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.1em;
  color: var(--muted);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  border: 1px solid var(--grid);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.12em;
  color: var(--muted);
}
.tag--live {
  border-color: var(--green-deep);
  background-color: var(--green-deep);
  color: var(--green);
}
.tag--price {
  border-color: rgba(255, 122, 26, 0.45);
  color: var(--orange);
}

.dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background-color: var(--green);
}
.dot--live { animation: pulse-dot 2s var(--ease) infinite; }

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.78); }
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--s15);
}
.table th,
.table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--grid);
  text-align: left;
  vertical-align: top;
}
.table th {
  font-family: var(--font-mono);
  font-size: var(--s12);
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--muted);
  white-space: nowrap;
}
.table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.table tbody tr { transition: background-color 0.2s var(--ease); }
.table tbody tr:hover { background-color: var(--panel); }
.table .is-highlight {
  color: var(--orange);
  font-weight: 700;
}

/* ---------- 10. 图像容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--panel);
  border: 1px solid var(--grid);
  border-radius: 2px;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3  { aspect-ratio: 4 / 3; }
.media-frame--1x1  { aspect-ratio: 1 / 1; }
.media-frame--3x4  { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }

.media-frame--scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
    180deg,
    rgba(10, 12, 15, 0) 42%,
    rgba(10, 12, 15, 0.76) 100%
  );
  pointer-events: none;
}
.media-frame figcaption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: var(--s12);
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 11. 进入视口显现 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}
.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.32s var(--ease), transform 0.32s var(--ease);
}

/* ---------- 12. 移动端导航 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .brand-tagline { display: none; }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    margin-left: 0;
    padding: 16px;
    background-color: var(--panel);
    border: 1px solid var(--grid);
    border-radius: 20px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
  }
  .site-nav[data-open] { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav-link {
    display: block;
    padding: 12px 14px;
    font-size: var(--s18);
    border-radius: 6px;
  }
  .nav-link[aria-current="page"] {
    color: var(--green);
    background-color: var(--green-deep);
  }
  .nav-link[aria-current="page"]::after { display: none; }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-left: 0;
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid var(--grid);
  }
  .nav-actions .btn {
    width: 100%;
    padding: 13px 18px;
    font-size: var(--s15);
  }
}

@media (max-width: 420px) {
  .brand-mark { width: 34px; height: 34px; font-size: var(--s12); }
  .brand-name { font-size: var(--s12); letter-spacing: 0.06em; }
}

/* ---------- 13. 降低动态效果 ---------- */
@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;
  }

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

  .panel:hover { transform: none; }
}