/* =============================================================
   HTH赛事入口 — /assets/site.css
   共享外壳：reset / CSS 变量 / 中文排版 / 页头框架 / 页脚 / 通用组件
   ============================================================= */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, p, ul, ol, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; }
a { color: inherit; }

:root {
  /* 珠宝色分区 */
  --walnut: #2A1A12;
  --walnut-2: #3D2A1E;
  --cream: #F2E6D2;
  --oasis: #10554C;
  --oasis-bright: #1E8E78;
  --gold: #D89A2E;
  --signal: #FF6A2B;
  --indigo: #382A5E;
  --wine: #6B2233;
  --mist: #C7B49A;
  --ink: #17110C;
  --muted-on-light: #6C5A46;

  /* 极细边界与微阴影 */
  --line-dark: rgba(242, 230, 210, .16);
  --line-strong-dark: rgba(242, 230, 210, .30);
  --line-light: rgba(23, 17, 12, .14);
  --shadow-panel: 0 1px 0 rgba(0, 0, 0, .25), 0 18px 34px -28px rgba(0, 0, 0, .85);
  --shadow-panel-hover: 0 2px 0 rgba(0, 0, 0, .25), 0 26px 44px -26px rgba(0, 0, 0, .95);

  /* 框架 */
  --frame-max: 1240px;
  --frame-pad: clamp(20px, 4vw, 56px);
  --header-h: 92px;
  --radius: 2px;
  --ease: 150ms cubic-bezier(.4, 0, .2, 1);

  --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: "IBM Plex Mono", "DIN Alternate", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

body {
  background-color: var(--walnut);
  color: var(--cream);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.88;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- 中文排版层级（1.25 倍递进，最多五级） ---------- */
h1, h2, h3, h4 { font-weight: 800; line-height: 1.18; letter-spacing: -.01em; color: inherit; }
h1 { font-size: clamp(34px, 5.6vw, 80px); }
h2 { font-size: clamp(26px, 3.6vw, 44px); }
h3 { font-size: clamp(20px, 2.2vw, 27px); }
h4 { font-size: clamp(17px, 1.6vw, 20px); font-weight: 700; }

.prose { max-width: 68ch; font-size: 17px; line-height: 1.9; }
.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose a, .link-underline {
  color: var(--oasis-bright);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 142, 120, .45);
  transition: color var(--ease), border-color var(--ease);
}
.prose a:hover, .link-underline:hover { color: var(--gold); border-bottom-color: var(--gold); }

.lede { font-size: clamp(18px, 1.9vw, 21px); line-height: 1.75; color: var(--mist); max-width: 62ch; }
.eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold); display: block; }
.sec-num { font-family: var(--font-mono); font-size: 12px; letter-spacing: .18em; color: var(--gold); }
.rule { height: 1px; border: 0; background-color: var(--line-dark); margin: 0; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 9px; border: 1px solid var(--oasis-bright); border-radius: var(--radius);
  font-size: 12px; letter-spacing: .08em; color: var(--oasis-bright); background: transparent;
}
.note { font-size: 13.5px; line-height: 1.8; color: var(--mist); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 焦点与跳过链接 ---------- */
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.skip-link {
  position: absolute; left: var(--frame-pad); top: -70px; z-index: 200;
  display: inline-block; padding: 10px 16px; border-radius: var(--radius);
  background-color: var(--gold); color: var(--ink); font-weight: 700; font-size: 15px;
  text-decoration: none; transition: top var(--ease);
}
.skip-link:focus { top: 10px; }

/* ---------- 宽度容器 ---------- */
.frame { width: 100%; max-width: var(--frame-max); margin-inline: auto; padding-inline: var(--frame-pad); }

/* =============================================================
   页头：框架式导航
   ============================================================= */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background-color: rgba(42, 26, 18, .97);
  border-bottom: 1px solid var(--line-dark);
  transition: background-color var(--ease);
}
.site-header__frame {
  position: relative;
  width: 100%; max-width: var(--frame-max);
  margin-inline: auto; padding-inline: var(--frame-pad);
  min-height: var(--header-h);
  display: flex; align-items: center; gap: clamp(14px, 2vw, 32px);
  transition: min-height var(--ease);
}
.site-header.is-condensed { --header-h: 68px; background-color: rgba(42, 26, 18, .99); }
.site-header.is-condensed .site-header__frame { min-height: var(--header-h); }
.site-header__rail {
  position: fixed; z-index: 1; pointer-events: none;
  top: var(--header-h); bottom: 0;
  left: calc((100vw - min(100vw, var(--frame-max))) / 2 + var(--frame-pad));
  width: 1px;
  background-image: linear-gradient(180deg, rgba(30, 142, 120, .60) 0%, rgba(30, 142, 120, .26) 62%, rgba(30, 142, 120, 0) 100%);
  transition: top var(--ease);
}
.site-header__progress {
  position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  transform: scaleX(0); transform-origin: 0 50%;
  background-image: linear-gradient(90deg, var(--signal), var(--gold));
  z-index: 2;
}
.site-header__cta { margin-left: auto; flex: 0 0 auto; }

.brand-mark { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--cream); flex: 0 0 auto; }
.brand-mark__glyph {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .14em;
  padding: 6px 9px; border: 1px solid var(--gold); border-radius: var(--radius); color: var(--gold);
  transition: background-color var(--ease), color var(--ease);
}
.brand-mark:hover .brand-mark__glyph { background-color: var(--gold); color: var(--ink); }
.brand-mark__text { font-weight: 800; font-size: clamp(17px, 1.5vw, 20px); letter-spacing: .02em; }

/* ---------- 导航 ---------- */
.site-nav { margin-inline: auto; }
.site-nav__list { display: flex; align-items: center; gap: clamp(10px, 1.8vw, 26px); list-style: none; }
.site-nav__link {
  position: relative; display: inline-flex; align-items: baseline; gap: 6px;
  padding: 8px 2px; font-size: 15px; font-weight: 600; color: var(--mist);
  text-decoration: none; transition: color var(--ease);
}
.site-nav__link::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 1px;
  background-color: var(--gold); transform: scaleX(0); transform-origin: 0 50%;
  transition: transform 160ms cubic-bezier(.4, 0, .2, 1);
}
.site-nav__link:hover { color: var(--cream); }
.site-nav__link:hover::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--cream); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); background-color: var(--signal); }
.site-nav__index { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: var(--gold); }
.site-nav__text { white-space: nowrap; }

/* ---------- 移动导航按钮 ---------- */
.nav-toggle {
  display: none; align-items: center; gap: 9px;
  padding: 9px 12px; background-color: transparent;
  border: 1px solid var(--line-strong-dark); border-radius: var(--radius);
  color: var(--cream); cursor: pointer;
  transition: border-color var(--ease), color var(--ease);
}
.nav-toggle:hover { border-color: var(--oasis-bright); color: #fff; }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; width: 16px; }
.nav-toggle__bar { display: block; height: 1.5px; width: 100%; background-color: currentColor; transition: transform var(--ease); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:first-child { transform: translateY(2.75px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:last-child { transform: translateY(-2.75px) rotate(-45deg); }
.nav-toggle__label { font-size: 13px; letter-spacing: .08em; }

/* =============================================================
   通用按钮
   ============================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px; border: 1px solid transparent; border-radius: var(--radius);
  font-size: 15px; font-weight: 700; letter-spacing: .02em; text-decoration: none;
  cursor: pointer; transition: background-color var(--ease), color var(--ease), border-color var(--ease), transform var(--ease);
}
.btn--signal { background-color: var(--signal); color: #1B0E06; }
.btn--signal:hover { background-color: #FF7F47; transform: translateY(-1px); }
.btn--outline { background-color: transparent; border-color: var(--oasis-bright); color: var(--cream); }
.btn--outline:hover { background-color: rgba(30, 142, 120, .16); }
.btn--quiet { background-color: transparent; border-color: var(--line-strong-dark); color: var(--cream); }
.btn--quiet:hover { border-color: var(--gold); color: var(--gold); }
.btn--block { width: 100%; }

/* =============================================================
   色彩分区与堆叠面板
   ============================================================= */
.section { padding-block: clamp(48px, 7vw, 104px); }
.section--walnut { background-color: var(--walnut); color: var(--cream); }
.section--walnut-2 { background-color: var(--walnut-2); color: var(--cream); }
.section--oasis { background-color: var(--oasis); color: var(--cream); }
.section--indigo { background-color: var(--indigo); color: var(--cream); }
.section--wine { background-color: var(--wine); color: var(--cream); }
.section--cream { background-color: var(--cream); color: var(--ink); }

.section--cream .lede, .panel--cream .lede { color: var(--muted-on-light); }
.section--cream .note, .panel--cream .note { color: var(--muted-on-light); }
.section--cream .eyebrow, .panel--cream .eyebrow,
.section--cream .sec-num, .panel--cream .sec-num { color: var(--wine); }
.section--cream .rule, .panel--cream .rule { background-color: var(--line-light); }
.section--cream .tag, .panel--cream .tag { border-color: var(--oasis); color: var(--oasis); }
.section--cream .stat__label, .panel--cream .stat__label { color: var(--muted-on-light); }
.section--cream .index-list, .panel--cream .index-list,
.section--cream .index-list__item, .panel--cream .index-list__item { border-color: var(--line-light); }
.section--cream .index-list__link, .panel--cream .index-list__link { color: var(--ink); }
.section--cream .index-list__link:hover, .panel--cream .index-list__link:hover { background-color: rgba(16, 85, 76, .08); color: var(--ink); }
.section--cream .index-list__num, .panel--cream .index-list__num { color: var(--wine); }
.section--cream .index-list__meta, .panel--cream .index-list__meta { color: var(--muted-on-light); }

.panel {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background-color: var(--walnut-2);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.panel:hover { transform: translateY(-2px); box-shadow: var(--shadow-panel-hover); border-color: var(--line-strong-dark); }
.panel--cream { background-color: var(--cream); color: var(--ink); border-color: var(--line-light); }
.panel--outline { background-color: transparent; box-shadow: none; }
.panel--lift { margin-top: clamp(-34px, -2.6vw, -14px); }

/* =============================================================
   网格
   ============================================================= */
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--main-aside { grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); }
.stack { display: flex; flex-direction: column; gap: var(--stack-gap, 18px); }

/* =============================================================
   编辑部组件：目录 / 数据 / 时间轴 / 分割对比
   ============================================================= */
.index-list { list-style: none; border-top: 1px solid var(--line-dark); }
.index-list__item { border-bottom: 1px solid var(--line-dark); }
.index-list__link {
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px; align-items: baseline;
  padding: 14px 4px; color: var(--cream); text-decoration: none;
  transition: background-color var(--ease), color var(--ease), padding-left var(--ease);
}
.index-list__link:hover { background-color: rgba(30, 142, 120, .12); padding-left: 12px; color: #fff; }
.index-list__link.is-active { background-color: rgba(255, 106, 43, .10); padding-left: 12px; }
.index-list__num { font-family: var(--font-mono); font-size: 12px; color: var(--gold); }
.index-list__meta { font-family: var(--font-mono); font-size: 12.5px; color: var(--mist); white-space: nowrap; }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value { font-family: var(--font-mono); font-size: clamp(28px, 4vw, 42px); line-height: 1.05; letter-spacing: -.01em; color: var(--signal); }
.stat__label { font-size: 13px; line-height: 1.6; color: var(--mist); }

.timeline { list-style: none; display: flex; gap: 0; overflow-x: auto; padding-bottom: 6px; }
.timeline__item {
  position: relative; flex: 1 0 clamp(150px, 18vw, 210px);
  padding: 24px 18px 8px; border-top: 1px solid var(--line-dark);
}
.timeline__dot {
  position: absolute; top: -4px; left: 18px; width: 7px; height: 7px; border-radius: 50%;
  background-color: var(--gold); transition: background-color var(--ease), transform var(--ease);
}
.timeline__item:hover .timeline__dot { background-color: var(--signal); transform: scale(1.35); }
.timeline__label { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .06em; color: var(--mist); }

.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border: 1px solid var(--line-dark); border-radius: var(--radius); overflow: hidden; }
.split__side { padding: clamp(16px, 2.4vw, 26px); }
.split__side--top { background-image: linear-gradient(140deg, rgba(16, 85, 76, .92), rgba(16, 85, 76, .55)); }
.split__side--bottom { background-image: linear-gradient(140deg, rgba(107, 34, 51, .92), rgba(56, 42, 94, .60)); }

/* =============================================================
   图片容器（供页面阶段放置占位）
   ============================================================= */
.media { margin: 0; }
.media__frame {
  position: relative; overflow: hidden; border-radius: var(--radius);
  border: 1px solid var(--line-dark);
  background-image: linear-gradient(140deg, var(--walnut-2), var(--oasis));
  aspect-ratio: 16 / 9;
}
.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--tall .media__frame { aspect-ratio: 3 / 4; }
.media--square .media__frame { aspect-ratio: 1 / 1; }
.media__img { width: 100%; height: 100%; object-fit: cover; }
.media__frame--empty::after {
  content: attr(data-placeholder);
  position: absolute; inset: auto 12px 12px auto;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--mist);
}
.media__caption { margin-top: 8px; font-size: 13px; line-height: 1.7; color: var(--mist); }

/* =============================================================
   面包屑
   ============================================================= */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; font-size: 13px; color: var(--mist); }
.breadcrumb a { color: var(--mist); text-decoration: none; border-bottom: 1px solid transparent; transition: color var(--ease), border-color var(--ease); }
.breadcrumb a:hover { color: var(--cream); border-bottom-color: var(--gold); }
.breadcrumb__sep { color: var(--gold); }

/* =============================================================
   页脚
   ============================================================= */
.site-footer { position: relative; z-index: 2; background-color: var(--walnut); border-top: 1px solid var(--line-dark); color: var(--mist); }
.site-footer__frame { width: 100%; max-width: var(--frame-max); margin-inline: auto; padding: clamp(40px, 6vw, 76px) var(--frame-pad) 0; }
.site-footer__top {
  display: grid; grid-template-columns: minmax(220px, 1fr) minmax(0, 2.6fr);
  gap: clamp(24px, 4vw, 64px);
  padding-bottom: clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--line-dark);
}
.site-footer__brand { display: flex; flex-direction: column; gap: 14px; }
.site-footer__tagline { font-size: 14px; line-height: 1.85; color: var(--mist); max-width: 34ch; }
.site-footer__columns { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(16px, 2.4vw, 32px); }
.site-footer__col-title { font-size: 13px; font-weight: 700; letter-spacing: .16em; color: var(--gold); margin-bottom: 14px; }
.site-footer__list { list-style: none; }
.site-footer__link {
  display: block; padding: 5px 0; font-size: 14.5px; color: var(--cream); opacity: .84;
  text-decoration: none;
  transition: color var(--ease), opacity var(--ease), padding-left var(--ease);
}
.site-footer__link:hover { color: var(--oasis-bright); opacity: 1; padding-left: 6px; }
.site-footer__contact {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px;
  padding: clamp(20px, 3vw, 30px) 0 14px;
  border-bottom: 1px solid var(--line-dark);
}
.site-footer__contact-item {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 13.5px; letter-spacing: .01em; color: var(--cream);
}
.site-footer__note { font-size: 13px; line-height: 1.8; color: var(--mist); padding-bottom: 20px; }
.site-footer__legal { display: flex; flex-wrap: wrap; gap: 10px 22px; padding-top: 20px; font-size: 13.5px; }
.site-footer__legal a { color: var(--mist); text-decoration: none; border-bottom: 1px solid transparent; transition: color var(--ease), border-color var(--ease); }
.site-footer__legal a:hover { color: var(--cream); border-bottom-color: var(--gold); }
.site-footer__bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px;
  margin-top: 22px; padding: 18px 0 clamp(22px, 3vw, 30px);
  border-top: 1px solid var(--line-dark);
}
.site-footer__filing, .site-footer__copy { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .06em; color: var(--mist); }

/* ---------- 一键复制 ---------- */
.copy-btn {
  padding: 3px 8px; background-color: transparent;
  border: 1px solid var(--line-dark); border-radius: var(--radius);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; color: var(--mist);
  cursor: pointer; transition: color var(--ease), border-color var(--ease);
}
.copy-btn:hover { color: var(--cream); border-color: var(--oasis-bright); }
.copy-btn[data-copied] { color: var(--signal); border-color: var(--signal); }

/* =============================================================
   进入视口显现
   ============================================================= */
[data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity 420ms ease, transform 420ms cubic-bezier(.2, .7, .3, 1); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* =============================================================
   响应式
   ============================================================= */
@media (max-width: 1180px) {
  .grid--main-aside { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }
  .site-footer__top { grid-template-columns: 1fr; }
}

@media (max-width: 960px) {
  :root { --header-h: 64px; }
  .site-header.is-condensed { --header-h: 56px; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed; z-index: 70;
    top: var(--header-h); left: 0; right: 0;
    display: none;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 6px var(--frame-pad) 26px;
    background-color: var(--walnut-2);
    border-bottom: 1px solid var(--line-strong-dark);
    box-shadow: 0 28px 44px -30px rgba(0, 0, 0, .95);
  }
  .site-nav[data-open] { display: block; }
  .site-nav__list { display: block; }
  .site-nav__item { border-bottom: 1px solid var(--line-dark); }
  .site-nav__item:last-child { border-bottom: 0; }
  .site-nav__link { display: flex; width: 100%; gap: 12px; padding: 16px 0; font-size: 19px; font-weight: 800; color: var(--cream); }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { color: var(--signal); }
  .site-nav__index { font-size: 12px; }
  .site-footer__contact { gap: 10px 20px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--main-aside { grid-template-columns: minmax(0, 1fr); }
  .panel--lift { margin-top: 0; }
}

@media (max-width: 760px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
  .split { grid-template-columns: minmax(0, 1fr); }
  .site-footer__columns { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px 20px; }
}

@media (max-width: 640px) {
  body { font-size: 16.5px; line-height: 1.85; }
  .site-header__cta { padding: 9px 13px; font-size: 13.5px; }
  .nav-toggle__label { display: none; }
  .site-header__rail { opacity: .6; }
  .site-footer__bottom { flex-direction: column; }
}

/* =============================================================
   减弱动效
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .panel:hover { transform: none; }
}