/* ==========================================================================
   完美体育主站 · 共享样式表 /assets/site.css
   暗底看板 + 奶油年鉴：夜间演播室与赛场边线的视觉秩序
   ========================================================================== */

/* ---------- 0. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body { margin: 0; min-height: 100%; }

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

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

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

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

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

button { background: none; border: 0; cursor: pointer; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 1. 变量 ---------- */
:root {
  /* 色彩体系 */
  --night-blue: #0B1B2B;
  --arena-green: #10261F;
  --cream: #F3EBDD;
  --ink-brown: #1A140F;
  --signal-orange: #FF7A1A;
  --score-red: #FF3B1F;
  --electric-teal: #39D2C8;
  --label-teal: #93A8A6;
  --board-white: #F6F8F7;
  --shadow-black: #05090D;

  /* 结构 */
  --shell: 1320px;
  --gutter: clamp(16px, 3vw, 32px);
  --rule: 4px;

  /* 字体 */
  --font-headline: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", "STSong", Georgia, serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", "Roboto Mono", Consolas, "Courier New", monospace;

  /* 动效 */
  --dur-short: 180ms;
  --dur-base: 220ms;
  --dur-long: 260ms;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. 文档与中文排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: clamp(15px, 0.35vw + 14px, 17px);
  line-height: 1.75;
  letter-spacing: .01em;
  color: var(--board-white);
  background-color: var(--night-blue);
  background-image: repeating-linear-gradient(
    90deg,
    rgba(147, 168, 166, .045) 0 1px,
    transparent 1px 164px
  );
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-headline);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .01em;
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5vw, 64px); }
h2 { font-size: clamp(27px, 3.4vw, 50px); }
h3 { font-size: clamp(20px, 1.9vw, 30px); }

p, li { text-wrap: pretty; }

strong { font-weight: 700; }

::selection {
  background: var(--signal-orange);
  color: var(--ink-brown);
}

/* ---------- 3. 焦点与无障碍 ---------- */
:focus { outline: none; }

:focus-visible {
  outline: 3px solid var(--electric-teal);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -140px;
  z-index: 200;
  padding: 12px 22px;
  background: var(--signal-orange);
  color: var(--ink-brown);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  border: 2px solid var(--ink-brown);
  box-shadow: 4px 4px 0 var(--shadow-black);
  transition: top var(--dur-short) var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 4. 通用容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.prose { max-width: 38em; }
.prose p + p { margin-top: 1em; }
.prose h3 { margin-top: 1.5em; margin-bottom: .5em; }

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 3fr); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ---------- 5. 分区节奏 ---------- */
.section {
  position: relative;
  padding-block: clamp(46px, 6vw, 96px);
}

.section--tight { padding-block: clamp(28px, 3.5vw, 56px); }

.section--green { background: var(--arena-green); }

.section--cream {
  background: var(--cream);
  color: var(--ink-brown);
  border-top: var(--rule) solid var(--ink-brown);
  border-bottom: var(--rule) solid var(--ink-brown);
}

.section--cream .label { color: rgba(26, 20, 15, .62); }

.section--cream .tag {
  color: rgba(26, 20, 15, .72);
  border-color: rgba(26, 20, 15, .45);
  background: rgba(26, 20, 15, .05);
}

/* ---------- 6. 页头：框架式导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--night-blue);
  border-bottom: var(--rule) solid var(--signal-orange);
  box-shadow: 0 6px 0 var(--shadow-black);
}

.site-header__frame {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 76px;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 38px);
  border-left: 1px solid rgba(147, 168, 166, .22);
  border-right: 1px solid rgba(147, 168, 166, .22);
}

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

.brand-mark__name {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(19px, 1.8vw, 25px);
  line-height: 1.1;
  letter-spacing: .05em;
  color: var(--board-white);
}

.brand-mark__tag {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--label-teal);
  white-space: nowrap;
}

.brand-mark:hover .brand-mark__name { color: var(--electric-teal); }

/* 移动抽屉按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 10px 14px;
  border: 2px solid var(--label-teal);
  color: var(--board-white);
  font-size: 12px;
  letter-spacing: .18em;
  transition: border-color var(--dur-base) var(--ease), color var(--dur-base) var(--ease);
}

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

.nav-toggle__icon {
  display: block;
  position: relative;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: background var(--dur-base) var(--ease);
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur-base) var(--ease), top var(--dur-base) var(--ease);
}

.nav-toggle__icon::before { top: -7px; }
.nav-toggle__icon::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__icon { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::before { top: 0; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon::after { top: 0; transform: rotate(-45deg); }

/* 主导航 */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.35vw, 22px);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 9px 2px;
  font-size: 15px;
  color: var(--label-teal);
  border-bottom: 2px solid transparent;
  transition: color var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--board-white);
  border-bottom-color: var(--electric-teal);
}

.site-nav__link[aria-current="page"] {
  color: var(--board-white);
  border-bottom-color: var(--signal-orange);
}

.site-nav__aux { display: none; }

/* 右侧动作 */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .07em;
  border: 2px solid var(--cream);
  color: var(--cream);
  background: transparent;
  box-shadow: 3px 3px 0 var(--shadow-black);
  transition:
    transform var(--dur-base) var(--ease),
    box-shadow var(--dur-base) var(--ease),
    background-color var(--dur-base) var(--ease),
    border-color var(--dur-base) var(--ease),
    color var(--dur-base) var(--ease);
}

.btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 var(--shadow-black);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--shadow-black);
}

.btn--ghost {
  border-color: var(--electric-teal);
  color: var(--electric-teal);
}

.btn--ghost:hover {
  background: var(--electric-teal);
  color: var(--night-blue);
}

.btn--signal {
  background: var(--signal-orange);
  border-color: var(--signal-orange);
  color: var(--ink-brown);
}

.btn--signal:hover {
  background: var(--score-red);
  border-color: var(--score-red);
  color: var(--board-white);
}

.btn--cream {
  border-color: var(--ink-brown);
  color: var(--ink-brown);
  background: transparent;
  box-shadow: 3px 3px 0 var(--ink-brown);
}

.btn--cream:hover {
  background: var(--ink-brown);
  color: var(--cream);
  box-shadow: 5px 5px 0 var(--ink-brown);
}

/* ---------- 8. 顶部滚动进度 ---------- */
.site-header__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--rule);
  background: rgba(5, 9, 13, .55);
  pointer-events: none;
  overflow: hidden;
}

.site-header__progress-fill {
  display: block;
  width: 0;
  height: 100%;
  background: var(--electric-teal);
  box-shadow: 0 0 14px rgba(57, 210, 200, .65);
  transition: width 100ms linear;
}

/* ---------- 9. 内页标题区与面包屑 ---------- */
.page-head {
  padding-block: clamp(34px, 5vw, 68px) clamp(20px, 3vw, 38px);
  border-bottom: 2px solid rgba(147, 168, 166, .28);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 18px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--label-teal);
}

.breadcrumb a {
  border-bottom: 1px solid transparent;
  transition: color var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}

.breadcrumb a:hover {
  color: var(--electric-teal);
  border-bottom-color: var(--electric-teal);
}

.breadcrumb__sep {
  color: rgba(147, 168, 166, .5);
}

/* ---------- 10. 标签与记分数字 ---------- */
.label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--label-teal);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--label-teal);
  border: 1px solid rgba(147, 168, 166, .5);
  background: rgba(147, 168, 166, .08);
}

.tag--signal {
  color: var(--signal-orange);
  border-color: rgba(255, 122, 26, .58);
  background: rgba(255, 122, 26, .1);
}

.tag--teal {
  color: var(--electric-teal);
  border-color: rgba(57, 210, 200, .55);
  background: rgba(57, 210, 200, .1);
}

.board-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: .9;
  letter-spacing: -.02em;
  color: var(--score-red);
  text-shadow: 0 0 22px rgba(255, 59, 31, .38);
}

.board-num--xl { font-size: clamp(58px, 11vw, 132px); }
.board-num--lg { font-size: clamp(40px, 5vw, 72px); }
.board-num--md { font-size: clamp(26px, 3vw, 40px); }

.section--cream .board-num { text-shadow: none; }

/* ---------- 11. 卡片与展览说明牌 ---------- */
.card {
  background: rgba(16, 38, 31, .72);
  border: 2px solid rgba(147, 168, 166, .3);
  box-shadow: 6px 6px 0 var(--shadow-black);
  padding: clamp(18px, 2vw, 28px);
}

.section--cream .card {
  background: rgba(26, 20, 15, .04);
  border-color: rgba(26, 20, 15, .35);
  box-shadow: 6px 6px 0 var(--ink-brown);
}

.plate {
  position: relative;
  padding: 16px 18px 16px 20px;
  border-left: 3px solid var(--signal-orange);
  background: rgba(5, 9, 13, .42);
}

.plate__no {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--signal-orange);
}

.plate__cat {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--label-teal);
}

.plate__title {
  margin-top: 8px;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.25;
}

.plate__text {
  margin-top: 7px;
  font-size: 15px;
  color: var(--label-teal);
}

.section--cream .plate {
  background: rgba(26, 20, 15, .05);
  border-left-color: var(--ink-brown);
}

.section--cream .plate__no { color: var(--ink-brown); }
.section--cream .plate__cat { color: rgba(26, 20, 15, .6); }
.section--cream .plate__text { color: rgba(26, 20, 15, .74); }

/* ---------- 12. 响应式图片容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--arena-green);
  border: 3px solid var(--ink-brown);
  box-shadow: 8px 8px 0 var(--shadow-black);
}

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

.media-frame--21x9 { aspect-ratio: 21 / 9; }
.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__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  background: rgba(5, 9, 13, .84);
  color: var(--board-white);
  font-size: 12px;
  letter-spacing: .1em;
}

.section--cream .media-frame { border-color: var(--ink-brown); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  background: var(--arena-green);
  color: var(--board-white);
  border-top: var(--rule) solid var(--signal-orange);
  box-shadow: 0 -6px 0 var(--shadow-black);
}

.footer-frame {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(42px, 5vw, 76px) var(--gutter) clamp(26px, 3vw, 44px);
  display: grid;
  grid-template-columns: 1.05fr 1.7fr 1.05fr;
  gap: clamp(26px, 3.2vw, 52px);
}

.footer-brand__name {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: clamp(22px, 2vw, 28px);
  line-height: 1.1;
  letter-spacing: .05em;
}

.footer-brand__tag {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--signal-orange);
}

.footer-brand__note {
  margin-top: 16px;
  max-width: 26em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--label-teal);
}

.footer-nav__title,
.footer-contact__title {
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(147, 168, 166, .3);
}

.footer-nav__cols {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 30px);
}

.footer-col__title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--board-white);
}

.footer-col__list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col__list a {
  font-size: 14px;
  color: var(--label-teal);
  border-bottom: 1px solid transparent;
  transition: color var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}

.footer-col__list a:hover,
.footer-col__list a:focus-visible {
  color: var(--electric-teal);
  border-bottom-color: var(--electric-teal);
}

.footer-contact__list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-contact__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-contact__key {
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: rgba(147, 168, 166, .75);
}

.footer-contact__value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--board-white);
  word-break: break-word;
}

.footer-legal {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 18px var(--gutter) 28px;
  border-top: 1px solid rgba(147, 168, 166, .28);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--label-teal);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-legal__links a {
  border-bottom: 1px solid transparent;
  transition: color var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}

.footer-legal__links a:hover,
.footer-legal__links a:focus-visible {
  color: var(--electric-teal);
  border-bottom-color: var(--electric-teal);
}

/* ---------- 14. 返回顶部 ---------- */
.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(14px, 3vw, 30px);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 16px;
  background: var(--night-blue);
  color: var(--board-white);
  border: 2px solid var(--electric-teal);
  box-shadow: 4px 4px 0 var(--shadow-black);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition:
    opacity var(--dur-base) var(--ease),
    transform var(--dur-base) var(--ease),
    visibility var(--dur-base),
    background-color var(--dur-base) var(--ease);
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  background: var(--electric-teal);
  color: var(--night-blue);
}

.to-top__arrow { font-size: 14px; line-height: 1; }

/* ---------- 15. 显现动画 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--dur-long) var(--ease), transform var(--dur-long) var(--ease);
}

.js [data-reveal][data-visible="true"] {
  opacity: 1;
  transform: none;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1100px) {
  .nav-toggle { display: inline-flex; }

  .site-header__actions { display: none; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    display: none;
    background: var(--arena-green);
    border-top: 2px solid var(--signal-orange);
    border-bottom: var(--rule) solid var(--ink-brown);
    box-shadow: 0 10px 0 var(--shadow-black);
    padding: 18px var(--gutter) 26px;
    max-height: calc(100vh - 96px);
    max-height: calc(100dvh - 96px);
    overflow-y: auto;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__item {
    border-bottom: 1px solid rgba(147, 168, 166, .22);
  }

  .site-nav__item:last-child { border-bottom: 0; }

  .site-nav__link {
    display: block;
    padding: 14px 2px;
    font-size: 16px;
    border-bottom: 0;
  }

  .site-nav__link[aria-current="page"] {
    padding-left: 16px;
    color: var(--signal-orange);
  }

  .site-nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 7px;
    height: 7px;
    background: var(--signal-orange);
    transform: translateY(-50%);
  }

  .site-nav__aux {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
  }
}

@media (max-width: 1024px) {
  .footer-frame { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--split,
  .grid--halves {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 680px) {
  .footer-frame { grid-template-columns: 1fr; }
  .footer-nav__cols { grid-template-columns: 1fr 1fr; }
  .footer-legal {
    flex-direction: column;
    align-items: flex-start;
  }
  .media-frame {
    border-width: 2px;
    box-shadow: 5px 5px 0 var(--shadow-black);
  }
  .card { box-shadow: 4px 4px 0 var(--shadow-black); }
}

@media (max-width: 420px) {
  .footer-nav__cols { grid-template-columns: 1fr; }
  .brand-mark__tag { font-size: 10px; letter-spacing: .12em; }
}

/* ---------- 17. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }

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