/* ============================================================
   九体育赛场 — /assets/site.css
   共享外壳：重置 / 设计变量 / 中文排版 / 头部 / 页脚 / 基础组件
   ============================================================ */

/* ---------- 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h, 74px) + 1.25rem);
}

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

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

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

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

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; }

hr { border: 0; }

/* ---------- 设计变量 ---------- */
:root {
  /* 色彩 */
  --ink: #0A2420;
  --ink-2: #14342C;
  --ink-3: #05130F;
  --lime: #C8FF4D;
  --lime-soft: #E6FFB0;
  --amber: #FF8A47;
  --paper: #D9CDB4;
  --fog: #8FA39B;
  --chalk: #F4F6F1;
  --pure: #FFFFFF;

  --line: rgba(200, 255, 77, 0.18);
  --line-soft: rgba(244, 246, 241, 0.13);
  --line-amber: rgba(255, 138, 71, 0.42);

  /* 字体 */
  --font-display: 'HarmonyOS Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 尺度 */
  --pad: clamp(1.15rem, 4vw, 3.5rem);
  --max: 1280px;
  --header-h: 74px;
  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 6px;
}

/* ---------- 页面底与中文排版 ---------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(244, 246, 241, 0.03) 1px, transparent 1px);
  background-size: 100% 5px;
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

h1 { font-size: clamp(2.4rem, 6vw, 5.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.6rem); }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.55rem); letter-spacing: -0.01em; }

p { max-width: 38em; }

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

main { display: block; padding-top: calc(var(--header-h, 74px) + 0.5rem); }

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

/* ---------- 通用工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.lede {
  font-size: clamp(1rem, 1.35vw, 1.12rem);
  line-height: 1.8;
  color: rgba(244, 246, 241, 0.72);
  max-width: 34em;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.num--lime { color: var(--lime); }
.num--amber { color: var(--amber); }

.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fog);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--lime);
}

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

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

/* ---------- 章节画布 ---------- */
.section {
  position: relative;
  padding-block: clamp(3rem, 7vw, 6rem);
}

.section--tint { background: var(--ink-2); }

.section--paper {
  background: var(--paper);
  color: var(--ink);
}

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

.section--paper .lede { color: rgba(20, 52, 44, 0.78); }

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.5vw, 2rem);
}

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

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

/* ---------- 纸张叠层 ---------- */
.paper {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  padding: clamp(1.1rem, 2.5vw, 1.8rem);
  box-shadow: 4px 4px 0 rgba(5, 19, 15, 0.55);
}

.paper::before {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(200, 255, 77, 0.12);
  border-radius: inherit;
  transform: translate(-3px, -3px);
  pointer-events: none;
}

/* ---------- 标签与印章 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(200, 255, 77, 0.07);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--lime-soft);
}

.stamp {
  position: relative;
  display: inline-block;
  padding: 0.8rem 1.05rem 0.85rem;
  border: 2px solid var(--amber);
  border-radius: var(--r-sm);
  background:
    repeating-linear-gradient(-45deg, rgba(255, 138, 71, 0.12) 0 6px, transparent 6px 12px),
    rgba(255, 138, 71, 0.05);
  color: var(--lime-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.stamp__num {
  display: block;
  margin-top: 0.35rem;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

/* ---------- 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    repeating-linear-gradient(135deg, rgba(200, 255, 77, 0.07) 0 8px, transparent 8px 16px),
    var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

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

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(5, 19, 15, 0.4) 1px, transparent 1px);
  background-size: 4px 4px;
  opacity: 0.5;
  mix-blend-mode: multiply;
}

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

.media--plain::after { display: none; }

.section--paper .media {
  border-color: rgba(20, 52, 44, 0.24);
  background:
    repeating-linear-gradient(135deg, rgba(20, 52, 44, 0.08) 0 8px, transparent 8px 16px),
    #C6B99E;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.6rem 1.1rem;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color 0.18s ease,
    color 0.18s ease,
    border-color 0.18s ease,
    transform 0.18s ease;
}

.btn--lime {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.btn--lime:hover {
  background: var(--lime-soft);
  border-color: var(--lime-soft);
  transform: translateY(-1px);
}

.btn--line {
  background: transparent;
  border-color: rgba(200, 255, 77, 0.45);
  color: var(--lime);
}

.btn--line:hover {
  background: rgba(200, 255, 77, 0.12);
  border-color: var(--lime);
}

/* ---------- 跳链 ---------- */
.skip-link {
  position: fixed;
  top: 0.55rem;
  left: 0.55rem;
  z-index: 200;
  padding: 0.55rem 1rem;
  border-radius: var(--r-md);
  background: var(--lime);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transform: translateY(-220%);
  transition: transform 0.18s ease;
}

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

/* ============================================================
   头部
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 70;
  background: rgba(10, 36, 32, 0.9);
  border-bottom: 1px solid var(--line-soft);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.progress {
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: rgba(244, 246, 241, 0.08);
  overflow: hidden;
}

.progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: var(--lime);
  box-shadow: 0 0 12px rgba(200, 255, 77, 0.7);
  transition: width 0.12s linear;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  max-width: 1320px;
  margin-inline: auto;
  padding: 0.7rem var(--pad);
  transition:
    margin 0.3s ease,
    padding 0.3s ease,
    border-radius 0.3s ease,
    background-color 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex: 0 0 auto;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: var(--r-md);
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
  box-shadow: 3px 3px 0 rgba(200, 255, 77, 0.22);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  min-width: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--chalk);
  white-space: nowrap;
}

.brand__tag {
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--fog);
  white-space: nowrap;
}

/* 悬浮胶囊导航 */
.pill {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.15rem;
  flex: 0 1 auto;
  margin-inline: auto;
  padding: 0.28rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(20, 52, 44, 0.62);
}

.pill__list {
  display: flex;
  align-items: center;
  gap: 0.1rem;
}

.pill__link {
  display: block;
  padding: 0.42rem 0.82rem;
  border-radius: 999px;
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: rgba(244, 246, 241, 0.78);
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.pill__link:hover {
  color: var(--lime);
  background: rgba(200, 255, 77, 0.1);
}

.pill__link[aria-current="page"] {
  background: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.pill__cue {
  display: none;
  padding: 0.42rem 0.8rem;
  border-radius: 999px;
  background: rgba(200, 255, 77, 0.1);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lime);
  white-space: nowrap;
}

.pill__spot {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-left: 0.2rem;
  padding-left: 0.4rem;
  border-left: 1px solid var(--line);
}

.spot__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.42rem 0.7rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--fog);
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease;
}

.spot__link::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(255, 138, 71, 0.18);
}

.spot__link:hover {
  color: var(--lime-soft);
  background: rgba(200, 255, 77, 0.08);
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  flex: 0 0 auto;
  margin-left: auto;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(200, 255, 77, 0.3);
  border-radius: var(--r-md);
  background: rgba(200, 255, 77, 0.08);
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
  transition: background-color 0.2s ease;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--lime);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(4rem, 9vw, 7rem);
  background: var(--ink-3);
  border-top: 1px solid var(--line);
  color: rgba(244, 246, 241, 0.8);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--lime) 0 32%,
    var(--amber) 32% 42%,
    rgba(244, 246, 241, 0.12) 42% 100%
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(2.8rem, 6vw, 4.6rem) var(--pad) clamp(2rem, 4vw, 3rem);
}

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

.footer-claim {
  margin-top: 1.15rem;
  max-width: 16em;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.1vw, 1.5rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--chalk);
}

.footer-season {
  display: inline-block;
  margin-top: 1.1rem;
  padding: 0.35rem 0.7rem;
  border: 1px dashed rgba(200, 255, 77, 0.42);
  border-radius: var(--r-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lime-soft);
}

.footer-head {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fog);
  line-height: 1.6;
}

.footer-head::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--line-soft);
}

.footer-list {
  display: grid;
  gap: 0.55rem;
}

.footer-list li {
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 246, 241, 0.7);
}

.footer-list a {
  color: rgba(244, 246, 241, 0.72);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer-list a:hover {
  color: var(--lime);
  border-bottom-color: rgba(200, 255, 77, 0.5);
}

.footer-list--mono li {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.footer-note {
  margin-top: 1rem;
  max-width: 26em;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(143, 163, 155, 0.92);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem 1.6rem;
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding: 1.3rem var(--pad) 1.6rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--fog);
}

.footer-copy { margin: 0; max-width: none; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-left: auto;
}

.footer-legal a {
  color: var(--fog);
  transition: color 0.18s ease;
}

.footer-legal a:hover { color: var(--lime); }

/* ============================================================
   响应式：平板与手机
   ============================================================ */
@media (max-width: 1180px) {
  .pill__link { padding: 0.4rem 0.62rem; font-size: 12px; }
  .spot__link { padding: 0.4rem 0.55rem; }
}

@media (max-width: 1023px) {
  .header-inner {
    position: relative;
    padding-block: 0.62rem;
  }

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

  .header-actions .btn--line { display: none; }

  .pill {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--pad);
    right: var(--pad);
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
    margin-inline: 0;
    padding: 0.55rem;
    border-radius: var(--r-lg);
    border-color: var(--line);
    background: rgba(10, 36, 32, 0.98);
    box-shadow: 0 22px 54px rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .pill[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .pill__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0.12rem;
  }

  .pill__link {
    padding: 0.7rem 0.85rem;
    border-radius: var(--r-md);
    font-size: 14px;
    letter-spacing: 0.04em;
  }

  .pill__link[aria-current="page"] { border-radius: var(--r-md); }

  .pill__spot {
    flex-direction: row;
    gap: 0.3rem;
    margin-left: 0;
    margin-top: 0.35rem;
    padding-left: 0;
    padding-top: 0.45rem;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .spot__link { padding: 0.5rem 0.75rem; font-size: 11.5px; }

  .footer-grid { grid-template-columns: 1fr 1fr; }

  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }

  .brand__mark { width: 34px; height: 34px; font-size: 0.98rem; }
  .brand__name { font-size: 0.95rem; }
  .brand__tag { font-size: 9px; letter-spacing: 0.14em; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-claim { max-width: 20em; }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
  }

  .footer-legal { margin-left: 0; }

  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 460px) {
  .header-actions { gap: 0; }
  .pill__link { font-size: 13.5px; }
}

/* ---------- 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;
    scroll-behavior: auto !important;
  }
}