/* ==========================================================================
   江南赛事 · 共享样式 /assets/site.css
   夜赛深蓝 · 青黛 · 暖纸白 · 信号橙
   ========================================================================== */

:root {
  --night: #0A1A2B;
  --jiang: #1D4E56;
  --ink-teal: #12343A;
  --signal: #FF6A2A;
  --signal-hi: #FF7D46;
  --paper: #F7F1E6;
  --paper-white: #FFFDF7;
  --stand: #A7B5B3;
  --rain: #D8E6E3;
  --black: #14181B;
  --ember: #B84A1E;

  --line: 2px;
  --line-bold: 4px;
  --radius-pill: 999px;
  --radius-card: 16px;

  --shadow-hard: 5px 5px 0 var(--ink-teal);
  --shadow-hard-night: 5px 5px 0 var(--night);
  --shadow-soft: 4px 4px 0 rgba(18, 52, 58, 0.18);

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 108px;

  --font-display: "Noto Sans SC Condensed", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-ui: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 120px;
}

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

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

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

button { font: inherit; color: inherit; background: none; border: 0; }

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

table { border-collapse: collapse; }

/* ---------- base ---------- */
body {
  background-color: var(--paper);
  color: var(--black);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.75;
  padding-top: var(--header-h);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: var(--signal);
  color: var(--night);
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -180%);
  display: inline-block;
  padding: 10px 20px;
  background: var(--signal);
  color: var(--night);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: var(--line) solid var(--night);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-hard-night);
  transition: transform 0.2s var(--ease);
}

.skip-link:focus-visible,
.skip-link:focus {
  transform: translate(-50%, 0);
  outline-offset: 4px;
}

/* ---------- layout ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: clamp(48px, 7vw, 96px);
}

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

.section--night h2,
.section--night h3 { color: var(--paper-white); }

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

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 32px);
  align-items: start;
}

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

/* ---------- typographic marks ---------- */
.label-mono {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--jiang);
}

.section--night .label-mono { color: var(--rain); }

.chapter-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--jiang);
  background: var(--paper-white);
  border: var(--line) solid currentColor;
  border-radius: var(--radius-pill);
}

.section--night .chapter-tag {
  color: var(--signal);
  background: transparent;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--ink-teal);
  background: var(--paper-white);
  border: var(--line) solid var(--ink-teal);
  border-radius: var(--radius-pill);
  box-shadow: 3px 3px 0 var(--ink-teal);
  cursor: pointer;
  transition: transform 0.16s var(--ease), box-shadow 0.16s var(--ease),
              background-color 0.16s var(--ease), color 0.16s var(--ease);
}

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

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

.btn--signal {
  color: var(--night);
  background: var(--signal);
  border-color: var(--night);
  box-shadow: 3px 3px 0 var(--night);
}

.btn--signal:hover {
  background: var(--signal-hi);
  box-shadow: 5px 5px 0 var(--night);
}

.btn--signal:active { box-shadow: 1px 1px 0 var(--night); }

.btn--ghost {
  color: var(--jiang);
  background: transparent;
  border-color: var(--stand);
  box-shadow: none;
}

.btn--ghost:hover {
  background: var(--rain);
  border-color: var(--jiang);
  box-shadow: none;
  transform: none;
}

.btn--ghost:active { transform: translate(1px, 1px); box-shadow: none; }

.btn--paper {
  color: var(--night);
  background: var(--paper-white);
  border-color: var(--night);
  box-shadow: 3px 3px 0 var(--signal);
}

.btn--paper:hover { box-shadow: 5px 5px 0 var(--signal); }

/* ---------- chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--jiang);
  background: var(--paper-white);
  border: var(--line) solid var(--stand);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background-color 0.16s var(--ease), border-color 0.16s var(--ease),
              color 0.16s var(--ease), transform 0.16s var(--ease);
}

.chip:hover {
  border-color: var(--jiang);
  transform: translateY(-1px);
}

.chip[aria-pressed="true"],
.chip.is-active {
  color: var(--night);
  background: var(--signal);
  border-color: var(--night);
  box-shadow: 2px 2px 0 var(--night);
}

/* ---------- breadcrumbs ---------- */
.crumbs {
  padding-block: 18px 0;
}

.crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--jiang);
}

.crumbs__item { display: inline-flex; align-items: center; gap: 8px; }

.crumbs__link {
  color: var(--jiang);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.crumbs__link:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

.crumbs__sep { color: var(--stand); }

.crumbs__item[aria-current="page"] .crumbs__link,
.crumbs__item[aria-current="page"] {
  color: var(--black);
  font-weight: 700;
}

/* ---------- prose ---------- */
.prose {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  color: var(--black);
  max-width: 68ch;
}

.prose > * + * { margin-top: 1em; }

.prose h3 {
  font-family: var(--font-display);
  font-size: 24px;
  margin-top: 1.6em;
}

.prose ul { list-style: none; }

.prose ul li {
  position: relative;
  padding-left: 20px;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 8px;
  height: 2px;
  background: var(--signal);
}

/* ---------- media container ---------- */
.media {
  display: block;
  position: relative;
  overflow: hidden;
  background: var(--rain);
  border: var(--line) solid var(--ink-teal);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
}

.media__frame {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background-color: var(--rain);
  background-image:
    linear-gradient(to right, rgba(18, 52, 58, 0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(18, 52, 58, 0.10) 1px, transparent 1px);
  background-size: 44px 44px;
}

.media__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--jiang);
  background: var(--paper-white);
  border-top: var(--line) solid var(--ink-teal);
}

.media--wide .media__frame { aspect-ratio: 21 / 9; }
.media--tall .media__frame { aspect-ratio: 4 / 5; }

/* ==========================================================================
   HEADER · 悬浮胶囊浮岛
   ========================================================================== */
.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 80;
  padding: 16px var(--gutter) 0;
  pointer-events: none;
}

.nav-shell {
  pointer-events: auto;
  position: relative;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: clamp(8px, 1.6vw, 24px);
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 10px 12px 10px 16px;
  background: var(--paper-white);
  border: var(--line) solid var(--ink-teal);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-hard);
  transition: padding 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.site-header[data-condensed="true"] .nav-shell {
  padding: 6px 10px 6px 12px;
  box-shadow: 3px 3px 0 var(--ink-teal);
}

.site-header[data-condensed="true"] .brand__tag {
  display: none;
}

.site-header[data-condensed="true"] .brand__mark {
  width: 34px;
  height: 34px;
  font-size: 13px;
}

/* brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-inline-end: auto;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--paper-white);
  background: var(--night);
  border-radius: 11px;
  box-shadow: inset 0 0 0 2px var(--signal);
  transition: width 0.25s var(--ease), height 0.25s var(--ease);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--ink-teal);
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--jiang);
}

/* nav */
.primary-nav {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 20px);
  flex-wrap: wrap;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.primary-nav__item { display: block; }

.primary-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  color: var(--ink-teal);
  background: transparent;
  border: var(--line) solid transparent;
  border-radius: var(--radius-pill);
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease),
              border-color 0.16s var(--ease);
}

.primary-nav__link:hover {
  background: var(--rain);
  border-color: var(--stand);
}

.primary-nav__link[aria-current="page"] {
  color: var(--paper-white);
  background: var(--night);
  border-color: var(--night);
  box-shadow: inset 0 -3px 0 var(--signal);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-actions .btn { padding: 8px 16px; }

/* toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ink-teal);
  background: var(--paper-white);
  border: var(--line) solid var(--ink-teal);
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--ink-teal);
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

/* ==========================================================================
   FOOTER · 夜赛深蓝记分板
   ========================================================================== */
.site-footer {
  margin-top: clamp(56px, 8vw, 104px);
  background: var(--night);
  color: var(--paper);
  border-top: var(--line-bold) solid var(--signal);
}

.footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 1.25fr) minmax(280px, 2fr) minmax(260px, 1.35fr);
  gap: clamp(28px, 4vw, 56px);
  padding-block: clamp(40px, 6vw, 64px) clamp(28px, 4vw, 44px);
}

/* brand block */
.footer__brand { max-width: 34ch; }

.footer__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--night);
  background: var(--signal);
  border-radius: 12px;
  box-shadow: inset 0 0 0 2px var(--night);
}

.footer__name {
  margin-top: 14px;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--paper-white);
}

.footer__summary {
  margin-top: 10px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 241, 230, 0.78);
}

.footer__coords {
  margin-top: 18px;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--signal);
  border-top: 1px dashed rgba(216, 230, 227, 0.32);
}

/* columns */
.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 2.6vw, 36px);
}

.footer__col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--rain);
  padding-bottom: 10px;
  border-bottom: var(--line) solid rgba(216, 230, 227, 0.22);
}

.footer__links {
  margin-top: 14px;
  display: grid;
  gap: 2px;
}

.footer__link {
  display: inline-block;
  padding-block: 6px;
  font-size: 15px;
  color: rgba(247, 241, 230, 0.86);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.footer__link:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* contact */
.footer__contact-list {
  margin-top: 14px;
  display: grid;
  gap: 12px;
}

.footer__contact-item {
  display: grid;
  gap: 2px;
}

.footer__contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stand);
}

.footer__contact-value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-white);
  word-break: break-word;
}

.footer__copy {
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--night);
  background: var(--rain);
  border: 1px solid var(--rain);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease),
              border-color 0.16s var(--ease);
}

.footer__copy:hover {
  background: var(--signal);
  border-color: var(--signal);
}

.footer__copy[data-copied="true"] {
  color: var(--paper-white);
  background: var(--ember);
  border-color: var(--ember);
}

.footer__note {
  margin-top: 18px;
  padding-left: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: rgba(216, 230, 227, 0.62);
  border-left: 3px solid var(--signal);
}

/* legal */
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-block: 20px 28px;
  border-top: 1px dashed rgba(216, 230, 227, 0.28);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(216, 230, 227, 0.66);
}

.footer__legal-item { margin: 0; }

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-inline-start: auto;
}

.footer__legal-link {
  color: rgba(247, 241, 230, 0.78);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.footer__legal-link:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ==========================================================================
   滚动进度 & 返回顶部（JS 注入）
   ========================================================================== */
.scroll-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  z-index: 90;
  width: 100%;
  height: 4px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

.to-top {
  position: fixed;
  inset-inline-end: clamp(14px, 3vw, 30px);
  inset-block-end: clamp(14px, 3vw, 30px);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--night);
  background: var(--signal);
  border: var(--line) solid var(--night);
  border-radius: 12px;
  box-shadow: 4px 4px 0 var(--night);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease),
              visibility 0.2s var(--ease), box-shadow 0.16s var(--ease);
}

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

.to-top:hover { box-shadow: 6px 6px 0 var(--night); }

.to-top:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--night);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1080px) {
  .footer__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  :root { --header-h: 92px; }

  html { scroll-padding-top: 104px; }

  .site-header { padding-top: 12px; }

  .nav-shell {
    flex-wrap: wrap;
    padding: 8px 10px 8px 12px;
    border-radius: 22px;
  }

  .brand__name { font-size: 17px; }

  .nav-toggle { display: inline-flex; margin-inline-start: auto; }

  .primary-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    margin-top: 10px;
    padding-top: 12px;
    border-top: 2px dashed var(--stand);
  }

  .primary-nav[data-open="true"] { display: flex; }

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

  .primary-nav__link {
    display: block;
    padding: 12px 10px;
    font-size: 15px;
    border-radius: 10px;
    border-bottom: 1px solid rgba(167, 181, 179, 0.42);
  }

  .primary-nav__link[aria-current="page"] {
    border-radius: 10px;
    border-bottom: var(--line) solid var(--night);
    box-shadow: inset 4px 0 0 var(--signal);
  }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding-bottom: 4px;
  }

  .nav-actions .btn { width: 100%; justify-content: center; padding: 11px 16px; }

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

  .footer__top { grid-template-columns: minmax(0, 1fr); }
  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__legal-links { margin-inline-start: 0; }
}

@media (max-width: 560px) {
  body { font-size: 15px; }

  .brand__tag { display: none; }

  .footer__cols { grid-template-columns: minmax(0, 1fr); }
  .footer__name { font-size: 22px; }

  .media__caption { font-size: 11px; }

  .to-top { width: 44px; height: 44px; border-radius: 10px; }
}

/* ==========================================================================
   可访问性降级
   ========================================================================== */
@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;
  }

  .btn:hover,
  .to-top:hover { transform: none; }
}

@media print {
  .site-header,
  .to-top,
  .scroll-progress,
  .skip-link { display: none !important; }

  body { padding-top: 0; background: #fff; color: #000; }

  .site-footer { background: #fff; color: #000; border-top: 2px solid #000; }
  .footer__link,
  .footer__legal-link,
  .footer__summary,
  .footer__contact-value { color: #000; }
}