/* ===========================================================
   HTH赛事 · /assets/site.css
   共享层：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   =========================================================== */

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

:root {
  --ink: #0B1220;
  --rock: #16202E;
  --line: #2A3644;
  --silver: #C3CBD6;
  --paper: #F3EEE5;
  --moss: #6E7F5C;
  --clay: #B96A4B;
  --cyan: #2FE3CE;
  --signal: #FF7A2F;
  --frost: #8B95A6;

  --font-display: "Helvetica Neue", "Arial Narrow", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --rail-w: 92px;
  --maxw: 1240px;
  --gutter: clamp(18px, 4vw, 44px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --t: 160ms var(--ease);
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 148px;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; list-style: none; }
p { margin: 0 0 1em; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }

h1, h2, h3, h4 {
  margin: 0 0 .6em;
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: .06em;
  line-height: 1.2;
  color: var(--paper);
}

:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
::selection { background: var(--cyan); color: #062a26; }

/* ---------------------------------------------- 跳转链接 */
.skip-link {
  position: absolute;
  left: 12px;
  top: -70px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: #04211d;
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
  transition: top var(--t);
}
.skip-link:focus { top: 12px; }

/* ---------------------------------------------- 头部 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(11, 18, 32, .94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.site-header__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.header-top {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 26px);
  padding: 14px 0 13px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  flex: 0 0 auto;
  text-decoration: none;
}
.brand__mark {
  padding: 4px 9px 3px;
  border: 1px solid var(--line);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--paper);
  transition: border-color var(--t), color var(--t);
}
.brand:hover .brand__mark { border-color: var(--cyan); color: var(--cyan); }
.brand__line {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--frost);
}
.header-note {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .02em;
  color: var(--frost);
  white-space: nowrap;
  text-overflow: ellipsis;
}
.quick-nav { margin-left: auto; }
.quick-nav__list { display: flex; align-items: center; gap: clamp(10px, 1.5vw, 22px); }
.quick-nav__link {
  position: relative;
  display: inline-block;
  padding: 4px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--t);
}
.quick-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.quick-nav__link:hover { color: var(--cyan); }
.quick-nav__link:hover::after,
.quick-nav__link:focus-visible::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 8px 12px;
  border: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--silver);
  transition: border-color var(--t), color var(--t);
}
.nav-toggle__box { position: relative; display: inline-block; width: 18px; height: 12px; }
.nav-toggle__bar {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform var(--t);
}
.nav-toggle__bar:nth-child(1) { top: 2px; }
.nav-toggle__bar:nth-child(2) { top: 9px; }
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.site-header[data-open] .nav-toggle { border-color: var(--cyan); color: var(--cyan); }
.site-header[data-open] .nav-toggle__bar:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bar:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

.main-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3vw, 44px);
  padding: 12px 0 15px;
}
.main-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 4px 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 300;
  letter-spacing: .1em;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--t);
}
.main-nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--frost);
  transition: color var(--t);
}
.main-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -11px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.main-nav__link:hover { color: var(--paper); }
.main-nav__link:hover .main-nav__index { color: var(--cyan); }
.main-nav__link:hover::after,
.main-nav__link:focus-visible::after { transform: scaleX(1); }
.main-nav__link[aria-current="page"] { color: var(--cyan); }
.main-nav__link[aria-current="page"] .main-nav__index { color: var(--cyan); }
.main-nav__link[aria-current="page"]::after { transform: scaleX(1); }

@keyframes nav-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* ---------------------------------------------- 右侧固定竖向导览 */
.rail { display: none; }
.rail__brand {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .34em;
  color: var(--paper);
}
.rail__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(10px, 1.8vh, 20px);
}
.rail__link {
  position: relative;
  writing-mode: vertical-rl;
  padding: 2px 0;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--frost);
  text-decoration: none;
  transition: color var(--t), transform var(--t);
}
.rail__link::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -7px;
  width: 14px;
  height: 1px;
  margin-left: -7px;
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform var(--t);
}
.rail__link:hover { color: var(--paper); transform: translateX(-2px); }
.rail__link:hover::before,
.rail__link:focus-visible::before { transform: scaleX(1); }
.rail__link[aria-current="page"] { color: var(--cyan); }
.rail__link[aria-current="page"]::before { transform: scaleX(1); }
.rail__progress {
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
}
.rail__progress-fill {
  display: block;
  width: 100%;
  height: 0;
  background: var(--cyan);
  transition: height 120ms linear;
}

/* ---------------------------------------------- 页脚 */
.site-footer {
  margin-top: clamp(40px, 6vw, 88px);
  padding: clamp(38px, 5vw, 64px) 0 26px;
  background: linear-gradient(180deg, #0d1524 0%, #0B1220 100%);
  border-top: 1px solid var(--line);
}
.site-footer__inner {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.footer-lead {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(20px, 4vw, 56px);
  padding-bottom: clamp(26px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
}
.footer-lead__brand { min-width: 0; }
.footer-brand {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 300;
  letter-spacing: .18em;
  color: var(--paper);
}
.footer-summary {
  margin: 0;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--frost);
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 36px);
}
.footer-col__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--cyan);
}
.footer-col__list { display: flex; flex-direction: column; gap: 9px; }
.footer-link {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--silver);
  text-decoration: none;
  transition: color var(--t);
}
.footer-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t);
}
.footer-link:hover { color: var(--cyan); }
.footer-link:hover::after,
.footer-link:focus-visible::after { transform: scaleX(1); }
.footer-col__text {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--frost);
  word-break: break-word;
}
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--frost);
}
.footer-meta__legal { margin: 0; }
.footer-meta__year { margin: 0 0 0 auto; }

/* ---------------------------------------------- 容器与栅格 */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-12 { grid-column: span 12; }

/* ---------------------------------------------- 章节 */
.section {
  padding: clamp(44px, 6.5vw, 84px) 0;
  border-top: 1px solid var(--line);
}
.section--flush { border-top: 0; padding-top: 0; }
.section__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-bottom: clamp(20px, 3vw, 36px);
}
.section__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
}
.section__title {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 36px);
  letter-spacing: .07em;
}
.section__note {
  margin: 0 0 0 auto;
  font-size: 13px;
  color: var(--frost);
}
.rule { height: 1px; margin: 0; border: 0; background: var(--line); }

/* ---------------------------------------------- 米白纸面分区 */
.slab--paper { background: var(--paper); color: #1d2531; }
.slab--paper h1,
.slab--paper h2,
.slab--paper h3,
.slab--paper h4,
.slab--paper .section__title,
.slab--paper .card__title { color: #0B1220; }
.slab--paper .section__index { color: #8a5a3f; }
.slab--paper .section__note,
.slab--paper .card__text,
.slab--paper .prose { color: #4a5563; }
.slab--paper .prose strong { color: #0B1220; }
.slab--paper .prose a { color: #1a6d63; border-bottom-color: #1a6d63; }
.slab--paper .prose ul li::before { background: var(--clay); }
.slab--paper .rule { background: #ded6c8; }
.slab--paper .section { border-top-color: #ded6c8; }
.slab--paper .card { background: #fff; border-color: #ded6c8; }

/* ---------------------------------------------- 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--silver);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: .12em;
  text-decoration: none;
  transition: color var(--t), border-color var(--t), background-color var(--t), transform var(--t);
}
.btn:hover { transform: translateY(-2px); }
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.btn--signal {
  background: var(--signal);
  border-color: var(--signal);
  color: #231004;
  font-weight: 600;
}
.btn--signal:hover { background: #ff8f4c; border-color: #ff8f4c; }
.btn--quiet { padding-left: 0; padding-right: 0; border-color: transparent; color: var(--frost); }
.btn--quiet:hover { color: var(--cyan); }

/* ---------------------------------------------- 卡片与标签 */
.card {
  position: relative;
  display: block;
  padding: clamp(18px, 2.2vw, 26px);
  background: var(--rock);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color var(--t), transform var(--t), background-color var(--t);
}
.card:hover {
  border-color: var(--cyan);
  background: #182434;
  transform: translateY(-2px);
}
.card__meta {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--frost);
}
.card__title {
  margin: 0 0 8px;
  font-size: 20px;
  letter-spacing: .06em;
}
.card__text { margin: 0; font-size: 14px; line-height: 1.75; color: var(--frost); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--frost);
  text-decoration: none;
  transition: color var(--t), border-color var(--t), background-color var(--t);
}
.tag:hover { color: var(--cyan); border-color: var(--cyan); }
.tag.is-active,
.tag[aria-pressed="true"] { background: var(--moss); border-color: var(--moss); color: var(--paper); }
.tag--clay.is-active,
.tag--clay[aria-pressed="true"] { background: var(--clay); border-color: var(--clay); }

/* ---------------------------------------------- 面包屑 */
.crumbs { background: #0d1524; border-bottom: 1px solid var(--line); }
.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 14px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--frost);
}
.crumbs__item { display: inline-flex; align-items: center; gap: 10px; }
.crumbs__link { color: var(--frost); text-decoration: none; transition: color var(--t); }
.crumbs__link:hover { color: var(--cyan); }
.crumbs__sep { color: var(--line); }
.crumbs__current { color: var(--silver); }

/* ---------------------------------------------- 正文 */
.prose { max-width: 38em; }
.prose p { margin: 0 0 1.15em; }
.prose h2 { margin: 1.8em 0 .7em; font-size: clamp(22px, 2.6vw, 28px); }
.prose h3 { margin: 1.6em 0 .6em; font-size: 20px; }
.prose ul,
.prose ol { margin: 0 0 1.2em; padding-left: 1.1em; }
.prose li { position: relative; margin-bottom: .5em; }
.prose ul li { list-style: none; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: -1.1em;
  top: .85em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}
.prose strong { color: var(--paper); font-weight: 600; }
.prose a { color: var(--cyan); text-decoration: none; border-bottom: 1px solid rgba(47, 227, 206, .4); }

/* ---------------------------------------------- 图形容器 */
.figure { margin: 0; overflow: hidden; border: 1px solid var(--line); background: var(--rock); }
.figure__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, #16202E 0%, #0B1220 100%);
}
.figure__frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 54, 68, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 54, 68, .55) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: .55;
}
.figure__frame::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 2px;
  background: var(--cyan);
}
.figure__media { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; }
.figure__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--frost);
}
.figure--portrait .figure__frame { aspect-ratio: 3 / 4; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--square .figure__frame { aspect-ratio: 1 / 1; }

/* ---------------------------------------------- 表格与资料行 */
.table { width: 100%; font-size: 14px; }
.table caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--frost);
}
.table th,
.table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.table th {
  background: #101927;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--silver);
}
.table tbody tr { transition: background-color var(--t); }
.table tbody tr:hover { background: #131e2d; }
.table tbody td:first-child { border-left: 2px solid transparent; transition: border-color var(--t); }
.table tbody tr:hover td:first-child { border-left-color: var(--cyan); }

.ledger { border-top: 1px solid var(--line); }
.ledger__row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: background-color var(--t), padding-left var(--t);
}
.ledger__row:hover { background: #131e2d; padding-left: 12px; }
.ledger__no { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--cyan); }
.ledger__label { font-size: 16px; color: var(--silver); }
.ledger__value { font-family: var(--font-mono); font-size: 12px; color: var(--frost); }

/* ---------------------------------------------- 折叠面板 */
.panel-trigger {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  width: 100%;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  text-align: left;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 300;
  letter-spacing: .05em;
  color: var(--paper);
  transition: color var(--t);
}
.panel-trigger:hover { color: var(--cyan); }
.panel-trigger__sign {
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}
.panel-trigger__sign::before { content: "+"; }
.panel-trigger[aria-expanded="true"] .panel-trigger__sign::before { content: "–"; }
.panel {
  max-width: 46em;
  padding: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--frost);
  animation: panel-in 180ms var(--ease) both;
}
.panel[hidden] { display: none; }
.panel > :last-child { margin-bottom: 0; }
@keyframes panel-in {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------------------------------------------- 桌面竖向导览 */
@media (min-width: 1200px) {
  body { padding-right: var(--rail-w); }
  .rail {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--rail-w);
    padding: 20px 0 26px;
    background: linear-gradient(180deg, #0e1a2b 0%, #0B1220 55%, #0d1725 100%);
    border-left: 1px solid var(--line);
    z-index: 90;
  }
}
@media (min-width: 1200px) and (max-height: 700px) {
  .rail__brand { display: none; }
}

/* ---------------------------------------------- 平板 */
@media (max-width: 1023px) {
  .header-note,
  .quick-nav { display: none; }
  .nav-toggle { display: inline-flex; }
  .main-nav { display: none; border-top: 1px solid var(--line); }
  .site-header[data-open] .main-nav { display: block; animation: nav-in 180ms var(--ease) both; }
  .main-nav__list { flex-direction: column; gap: 0; padding: 4px 0 16px; }
  .main-nav__item { border-bottom: 1px solid var(--line); }
  .main-nav__item:last-child { border-bottom: 0; }
  .main-nav__link { width: 100%; padding: 15px 0; font-size: 19px; }
  .main-nav__link::after { display: none; }
  .main-nav__link[aria-current="page"] { padding-left: 12px; }
  .main-nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 14px;
    bottom: 14px;
    width: 2px;
    background: var(--cyan);
  }
  .footer-lead { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .span-3, .span-4, .span-5 { grid-column: span 6; }
  .span-6, .span-7, .span-8, .span-9 { grid-column: span 12; }
}

@media (max-width: 700px) {
  body { font-size: 16px; }
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .ledger__row { grid-template-columns: 48px minmax(0, 1fr); }
  .ledger__value { grid-column: 2; }
}

@media (max-width: 620px) {
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-9, .span-12 { grid-column: span 12; }
  .section__note { margin-left: 0; }
}

/* ---------------------------------------------- 降级动效 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}