/* ============================================================
   KK体育 · 共享样式表 /assets/site.css
   取景框：深墨绿底 + 石板灰分段 + 墨绿面板；荧光青只做交互与关键数字
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 4.5rem;
}

html:focus-within { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--kk-ink);
  color: var(--kk-paper);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd { margin: 0; }

::selection { background: var(--kk-mint); color: var(--kk-ink-deep); }

/* ---------- 2. 变量 ---------- */
:root {
  --kk-ink: #0B2B26;
  --kk-panel: #123B33;
  --kk-slate: #2A2F2E;
  --kk-paper: #F2EFE6;
  --kk-mint: #5FF2D2;
  --kk-track: #F26B3A;
  --kk-violet: #8E6BFF;
  --kk-moss: #6E8B74;
  --kk-clay: #C9A77A;
  --kk-line: #3E4A45;

  --kk-ink-deep: #06231F;
  --kk-paper-88: rgba(242, 239, 230, .88);
  --kk-paper-76: rgba(242, 239, 230, .76);
  --kk-paper-60: rgba(242, 239, 230, .60);
  --kk-mint-soft: rgba(95, 242, 210, .12);

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --wrap: 1180px;
  --gutter: clamp(1.15rem, 4vw, 3rem);
  --radius: 14px;
  --radius-sm: 8px;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --shadow-card: 0 28px 56px -44px rgba(0, 0, 0, .95);
  --shadow-panel: 0 32px 60px -40px rgba(0, 0, 0, .95);
  --step-section: clamp(2rem, 4vw, 4.5rem);
  --step-hero: clamp(2.6rem, 8vw, 6rem);
}

/* ---------- 3. 焦点与可访问性 ---------- */
:where(a, button, [tabindex], input, select, textarea, summary):focus-visible {
  outline: 2px solid var(--kk-mint);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 4. 顶部阅读进度 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(62, 74, 69, .5);
  z-index: 120;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--kk-mint) 0%, var(--kk-mint) 58%, var(--kk-track) 100%);
}

/* ---------- 5. Skip link ---------- */
.skip-link {
  position: absolute;
  top: .75rem;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -220%);
  padding: .7rem 1.4rem;
  border-radius: 999px;
  background: var(--kk-mint);
  color: var(--kk-ink-deep);
  font-weight: 700;
  font-size: .9375rem;
  letter-spacing: .06em;
  transition: transform .2s var(--ease);
}

.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- 6. 头部外壳 ---------- */
.site-header {
  position: relative;
  background: var(--kk-ink);
  border-bottom: 1px solid var(--kk-line);
}

.header-utility {
  background: var(--kk-slate);
  border-bottom: 1px solid var(--kk-line);
}

.header-utility__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .4rem 1.25rem;
  min-height: 2.75rem;
  padding-block: .4rem;
  font-size: .8125rem;
}

.header-utility__line {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .14em;
  color: var(--kk-paper-76);
}

.header-quick {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.15rem;
}

.header-quick__item { display: flex; }

.quick-link {
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(95, 242, 210, .32);
  color: var(--kk-mint);
  font-size: .8125rem;
  letter-spacing: .08em;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.quick-link:hover {
  color: var(--kk-paper);
  border-bottom-color: var(--kk-paper);
}

/* ---------- 7. 居中刊头 ---------- */
.masthead {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: .45rem;
  padding-block: clamp(1.6rem, 4vw, 2.75rem) clamp(1.1rem, 2.4vw, 1.6rem);
}

.masthead__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .42em;
  text-transform: uppercase;
  color: var(--kk-clay);
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .12rem;
  color: var(--kk-paper);
  transition: color .2s var(--ease);
}

.masthead__brand:hover { color: var(--kk-mint); }

.masthead__brand-text {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.7rem, 7.5vw, 4.9rem);
  line-height: .92;
  letter-spacing: .02em;
}

.masthead__brand-sub {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .5em;
  padding-left: .5em;
  text-transform: uppercase;
  color: var(--kk-moss);
}

.masthead__tagline {
  max-width: 32em;
  margin-top: .3rem;
  font-size: .9375rem;
  letter-spacing: .04em;
  color: var(--kk-paper-76);
}

/* ---------- 8. 栏目导航 ---------- */
.nav-bar {
  position: relative;
  background: var(--kk-ink);
  border-top: 1px solid var(--kk-line);
  border-bottom: 1px solid var(--kk-line);
}

.nav-bar__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  min-height: 3.25rem;
}

.site-nav { display: block; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(.6rem, 2.4vw, 2rem);
}

.site-nav__item { display: flex; }

.site-nav__link {
  display: inline-block;
  padding: .9rem .25rem;
  border-bottom: 2px solid transparent;
  font-size: .9375rem;
  letter-spacing: .08em;
  color: rgba(242, 239, 230, .82);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.site-nav__link:hover {
  color: var(--kk-mint);
  border-bottom-color: rgba(95, 242, 210, .5);
}

.site-nav__link[aria-current="page"] {
  color: var(--kk-mint);
  font-weight: 700;
  border-bottom-color: var(--kk-mint);
}

.nav-toggle { display: none; }
.nav-toggle__label { letter-spacing: .08em; }

/* ---------- 9. 移动端抽屉 ---------- */
@media (max-width: 767px) {
  .nav-bar {
    position: sticky;
    top: 0;
    z-index: 80;
  }

  .nav-bar__inner {
    justify-content: flex-start;
    gap: .75rem;
    min-height: 3rem;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    padding: .45rem .95rem;
    border: 1px solid var(--kk-line);
    border-radius: 999px;
    background: rgba(18, 59, 51, .92);
    color: var(--kk-paper);
    font-size: .875rem;
    cursor: pointer;
    transition: color .18s var(--ease), border-color .18s var(--ease);
  }

  .nav-toggle:hover {
    color: var(--kk-mint);
    border-color: var(--kk-mint);
  }

  .nav-toggle__bars {
    position: relative;
    display: block;
    width: 14px;
    height: 2px;
    background: currentColor;
    transition: background .2s var(--ease);
  }

  .nav-toggle__bars::before,
  .nav-toggle__bars::after {
    content: "";
    position: absolute;
    left: 0;
    width: 14px;
    height: 2px;
    background: currentColor;
    transition: transform .22s var(--ease);
  }

  .nav-toggle__bars::before { top: -5px; }
  .nav-toggle__bars::after { top: 5px; }

  .nav-toggle.is-open .nav-toggle__bars { background: transparent; }
  .nav-toggle.is-open .nav-toggle__bars::before { transform: translateY(5px) rotate(45deg); }
  .nav-toggle.is-open .nav-toggle__bars::after { transform: translateY(-5px) rotate(-45deg); }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    background: var(--kk-panel);
    border-bottom: 1px solid var(--kk-line);
    box-shadow: var(--shadow-panel);
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: .35rem var(--gutter) .9rem;
  }

  .site-nav__item + .site-nav__item { border-top: 1px solid var(--kk-line); }

  .site-nav__link {
    display: block;
    padding: .95rem .25rem;
    border-bottom: 0;
  }

  .site-nav__link[aria-current="page"] {
    border-bottom: 0;
    box-shadow: inset 3px 0 0 var(--kk-mint);
    padding-left: .8rem;
  }
}

/* ---------- 10. 通用容器与排版 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.main-content { display: block; }

.content-shell { padding-block: clamp(2.25rem, 5vw, 4.5rem); }
.content-shell--tight { padding-block: clamp(1.5rem, 3vw, 2.5rem); }

.prose { max-width: 34em; }
.prose > * + * { margin-top: 1em; }
.prose p { color: var(--kk-paper-88); }

.lead {
  max-width: 34em;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--kk-paper-88);
}

.hr {
  border: 0;
  border-top: 1px solid var(--kk-line);
  margin-block: clamp(1.5rem, 3vw, 2.5rem);
}

/* ---------- 11. 章节头 ---------- */
.section-head {
  display: grid;
  gap: .6rem;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.section-head__num {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--kk-clay);
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--step-section);
  line-height: 1.0;
  letter-spacing: -.01em;
}

.section-head__lead {
  max-width: 34em;
  color: var(--kk-paper-76);
}

/* ---------- 12. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 2.75rem;
  padding: .7rem 1.5rem;
  border: 1px solid var(--kk-line);
  border-radius: 999px;
  background: transparent;
  color: var(--kk-paper);
  font-size: .9375rem;
  font-weight: 600;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease),
              border-color .18s var(--ease), transform .18s var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--primary {
  background: var(--kk-mint);
  border-color: var(--kk-mint);
  color: var(--kk-ink-deep);
}

.btn--primary:hover {
  background: #7BF6DD;
  border-color: #7BF6DD;
}

.btn--track {
  background: var(--kk-track);
  border-color: var(--kk-track);
  color: #2A0E04;
}

.btn--track:hover { background: #FF8557; border-color: #FF8557; }

.btn--ghost { background: rgba(242, 239, 230, .05); }

.btn--ghost:hover {
  color: var(--kk-mint);
  border-color: var(--kk-mint);
}

/* ---------- 13. 胶囊切换 ---------- */
.switch {
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  padding: .15rem 0 .35rem;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.switch::-webkit-scrollbar { display: none; }

.switch__item {
  flex: 0 0 auto;
  padding: .45rem 1.05rem;
  border: 1px solid var(--kk-line);
  border-radius: 999px;
  background: rgba(242, 239, 230, .04);
  color: rgba(242, 239, 230, .86);
  font-size: .875rem;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.switch__item:hover {
  color: var(--kk-mint);
  border-color: var(--kk-mint);
}

.switch__item[aria-selected="true"],
.switch__item.is-active {
  background: var(--kk-mint);
  border-color: var(--kk-mint);
  color: var(--kk-ink-deep);
  font-weight: 700;
}

/* ---------- 14. 等宽数字 ---------- */
.num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.num--live { color: var(--kk-track); }
.num--key { color: var(--kk-mint); }

/* ---------- 15. 卡片 ---------- */
.card {
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  border: 1px solid var(--kk-line);
  border-radius: var(--radius);
  background: var(--kk-panel);
  box-shadow: var(--shadow-card);
}

.card--flat {
  background: rgba(18, 59, 51, .55);
  box-shadow: none;
}

.card--slate { background: var(--kk-slate); }

.card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1.15;
  letter-spacing: .01em;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--kk-paper-60);
}

/* ---------- 16. 图片容器（页面阶段放入 img / 内联 SVG） ---------- */
.figure {
  position: relative;
  display: block;
  overflow: hidden;
  isolation: isolate;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--kk-line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--kk-panel) 0%, var(--kk-slate) 100%);
}

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

.figure--wide { aspect-ratio: 21 / 9; }
.figure--tall { aspect-ratio: 4 / 5; }
.figure--square { aspect-ratio: 1 / 1; }

.figure--board {
  background-image:
    linear-gradient(rgba(110, 139, 116, .26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 139, 116, .26) 1px, transparent 1px);
  background-size: 28px 28px;
  background-color: var(--kk-panel);
}

.figure__caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 1.5rem 1rem .8rem;
  font-size: .8125rem;
  color: var(--kk-paper-88);
  background: linear-gradient(to top, rgba(11, 43, 38, .94), rgba(11, 43, 38, 0));
}

.figure__chip {
  position: absolute;
  top: .75rem;
  left: .75rem;
  padding: .2rem .65rem;
  border: 1px solid var(--kk-line);
  border-radius: 999px;
  background: rgba(11, 43, 38, .84);
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--kk-mint);
}

/* ---------- 17. 网格 ---------- */
.grid {
  display: grid;
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); }

.grid--12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.4vw, 1.75rem);
}

@media (max-width: 900px) {
  .grid--12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
  .grid--12 { grid-template-columns: 1fr; }
}

/* ---------- 18. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  padding-block: .25rem;
  font-size: .8125rem;
  color: var(--kk-paper-60);
}

.breadcrumb__link {
  color: rgba(242, 239, 230, .82);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--kk-mint);
  border-bottom-color: var(--kk-mint);
}

.breadcrumb__sep { color: var(--kk-line); }
.breadcrumb__current { color: var(--kk-mint); }

/* ---------- 19. 页脚 ---------- */
.site-footer {
  margin-top: clamp(2rem, 5vw, 4rem);
  background: var(--kk-slate);
  border-top: 1px solid var(--kk-line);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.85fr);
  gap: clamp(1.75rem, 4vw, 3.5rem);
  padding-block: clamp(2rem, 4vw, 3.25rem);
}

.footer-brand {
  display: grid;
  gap: .85rem;
  align-content: start;
}

.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--kk-paper);
  transition: color .18s var(--ease);
}

.footer-brand__mark:hover { color: var(--kk-mint); }

.footer-brand__note {
  max-width: 26em;
  font-size: .9375rem;
  color: var(--kk-paper-76);
}

.footer-contact {
  display: grid;
  gap: .55rem;
  padding-top: .7rem;
  border-top: 1px solid var(--kk-line);
}

.footer-contact__item {
  display: grid;
  grid-template-columns: 4.75rem minmax(0, 1fr);
  gap: .75rem;
  align-items: baseline;
  font-size: .875rem;
}

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--kk-clay);
}

.footer-contact__value {
  color: var(--kk-paper-88);
  word-break: break-word;
}

.footer-brand__service {
  max-width: 30em;
  font-size: .8125rem;
  line-height: 1.6;
  color: rgba(242, 239, 230, .58);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2.5rem);
  align-content: start;
}

.footer-col {
  display: grid;
  gap: .65rem;
  align-content: start;
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--kk-mint);
}

.footer-col__list { display: grid; gap: .45rem; }

.footer-col__link {
  font-size: .9375rem;
  color: rgba(242, 239, 230, .82);
  transition: color .18s var(--ease);
}

.footer-col__link:hover { color: var(--kk-mint); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .5rem 1.5rem;
  padding-block: 1.1rem;
  border-top: 1px solid var(--kk-line);
}

.footer-legal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--kk-paper-60);
}

@media (max-width: 900px) {
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-contact__item { grid-template-columns: 1fr; gap: .1rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 20. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html:focus-within { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .scroll-progress__bar { transition: none !important; }
  .btn:hover { transform: none; }
}