/* =========================================================
   K1体育3915 — 共享样式表 /assets/site.css
   夜间赛场 × 数据脉冲 · 目录型内容地图 · 粗野主义骨架
   ========================================================= */

:root {
  --ink-900: #070B22;
  --ink-800: #0F1638;
  --ink-700: #1B2450;
  --line: #2E3A6B;
  --mint: #21F3E0;
  --orange: #FF6A2B;
  --violet-a: #7B4DFF;
  --violet-b: #C24BFF;
  --text: #F2F5FF;
  --text-mute: #A9B4D6;
  --ok: #47E08A;
  --amber: #FFB020;
  --black: #04061A;

  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
    "Liberation Mono", monospace;

  --shell: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --shadow-hard: 8px 8px 0 0 var(--black);
  --shadow-mint: 6px 6px 0 0 rgba(33, 243, 224, 0.3);
  --ease: cubic-bezier(0.22, 0.7, 0.3, 1);
}

/* ---------- 1. Reset & 基础排版 ---------- */

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

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

body {
  margin: 0;
  background-color: var(--ink-900);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
}

p { margin: 0; }

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

a {
  color: var(--mint);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

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

code, kbd, samp { font-family: var(--font-mono); }

::selection { background: var(--mint); color: var(--ink-900); }

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

#main-content:focus { outline: none; }

main { display: block; }

/* ---------- 2. 容器 ---------- */

.shell,
.header-inner,
.footer-inner,
.footer-base {
  width: calc(100% - var(--gutter) * 2);
  max-width: var(--shell);
  margin-inline: auto;
}

/* ---------- 3. Skip link ---------- */

.skip-link {
  position: absolute;
  left: 16px;
  top: -72px;
  z-index: 400;
  display: inline-block;
  padding: 11px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-900);
  background: var(--mint);
  border: 2px solid var(--ink-900);
  text-decoration: none;
  transition: top 0.18s ease;
}

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

/* ---------- 4. 页头 · 居中刊头 ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: #0A1030;
  background-image:
    radial-gradient(130% 170% at 50% -50%, rgba(123, 77, 255, 0.38), transparent 62%),
    linear-gradient(180deg, #0A1030 0%, var(--ink-800) 100%);
  border-bottom: 2px solid var(--line);
  transition: box-shadow 0.28s ease;
}

.site-header[data-stuck="true"] {
  box-shadow: 0 16px 0 -12px rgba(4, 6, 26, 0.95);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 300;
  pointer-events: none;
  transform: scaleX(var(--p, 0));
  transform-origin: 0 50%;
  background: linear-gradient(
    90deg,
    var(--mint) 0%,
    var(--violet-a) 38%,
    var(--violet-b) 70%,
    var(--orange) 100%
  );
}

.header-inner {
  padding-block: clamp(14px, 2.2vw, 24px) 0;
}

.masthead {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: clamp(12px, 2vw, 30px);
  padding-bottom: clamp(12px, 2vw, 18px);
}

.masthead::before {
  content: "";
  grid-column: 1;
  grid-row: 1;
  height: 2px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line) 0 14px,
    transparent 14px 26px
  );
}

.masthead__brand {
  grid-column: 2;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}

.masthead__mark {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 5px 8px 5px 10px;
  color: var(--ink-900);
  background: linear-gradient(135deg, var(--mint) 0%, #59F0FF 46%, var(--violet-b) 100%);
  box-shadow: 3px 3px 0 0 var(--orange);
}

.masthead__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.16;
}

.masthead__name {
  font-size: clamp(20px, 2.7vw, 29px);
  font-weight: 900;
  letter-spacing: 0.04em;
}

.masthead__tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-mute);
}

.masthead__status {
  grid-column: 3;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
  background: rgba(27, 36, 80, 0.72);
  border: 2px solid var(--line);
  white-space: nowrap;
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--ok);
  box-shadow: 0 0 0 3px rgba(71, 224, 138, 0.18);
  animation: k1-pulse 2.4s ease-in-out infinite;
}

@keyframes k1-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.82); }
}

/* ---------- 5. 主导航 ---------- */

.main-nav {
  position: relative;
  border-top: 2px solid var(--line);
}

.nav-toggle { display: none; }

.nav-list {
  counter-reset: navidx;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-list > li { counter-increment: navidx; }

.nav-list a {
  display: block;
  padding: 13px clamp(10px, 1.6vw, 20px);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-mute);
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.nav-list a::before {
  content: counter(navidx, decimal-leading-zero);
  margin-right: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.nav-list a:hover {
  color: var(--text);
  background-color: rgba(33, 243, 224, 0.07);
}

.nav-list a:focus-visible { outline-offset: -3px; }

.nav-list a[aria-current="page"] {
  color: var(--ink-900);
  background-color: var(--mint);
  border-bottom-color: var(--orange);
}

.nav-list a[aria-current="page"]::before { color: var(--ink-700); }

/* ---------- 6. 页头快捷键条 ---------- */

.utility-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  padding: 11px 0 13px;
  border-top: 1px dashed rgba(46, 58, 107, 0.85);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.utility-row__label { color: var(--text-mute); opacity: 0.7; }

.utility-link {
  color: var(--mint);
  text-decoration: none;
  border: 1px solid rgba(33, 243, 224, 0.45);
  padding: 3px 10px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.utility-link:hover {
  background-color: var(--mint);
  border-color: var(--mint);
  color: var(--ink-900);
}

/* ---------- 7. 页脚 ---------- */

.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  padding-bottom: 26px;
  color: var(--text);
  background-color: var(--ink-900);
  background-image:
    radial-gradient(90% 130% at 10% 0%, rgba(123, 77, 255, 0.3), transparent 62%),
    linear-gradient(180deg, #0A1030 0%, var(--ink-900) 74%);
  border-top: 2px solid var(--line);
}

.site-footer::before {
  content: "";
  display: block;
  height: 5px;
  background: linear-gradient(
    90deg,
    var(--mint) 0%,
    var(--violet-a) 34%,
    var(--violet-b) 66%,
    var(--orange) 100%
  );
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
  padding-block: clamp(36px, 5vw, 62px) clamp(24px, 3vw, 38px);
}

.footer-brand__mark {
  display: inline-block;
  padding-bottom: 6px;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 900;
  letter-spacing: 0.03em;
  color: var(--text);
  text-decoration: none;
  border-bottom: 3px solid var(--mint);
}

.footer-brand__line {
  margin-top: 16px;
  max-width: 34ch;
  font-size: 14px;
  color: var(--text-mute);
}

.footer-meta {
  display: grid;
  gap: 9px;
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
}

.footer-meta li {
  position: relative;
  padding-left: 16px;
}

.footer-meta li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  background: var(--orange);
}

.footer-note {
  max-width: 44ch;
  margin-top: 20px;
  padding: 12px 14px;
  font-size: 13px;
  color: var(--text-mute);
  background: rgba(255, 176, 32, 0.08);
  border-left: 3px solid var(--amber);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 34px);
  padding-left: clamp(18px, 3vw, 38px);
  border-left: 2px solid var(--line);
}

.footer-col__title {
  margin-bottom: 14px;
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mint);
  border-bottom: 1px solid var(--line);
}

.footer-col__list { display: grid; gap: 10px; }

.footer-col__list a {
  display: inline-block;
  padding: 2px 0;
  font-size: 14px;
  color: var(--text-mute);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-col__list a:hover {
  color: var(--text);
  transform: translateX(4px);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 20px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mute);
}

/* ---------- 8. 返回顶部 ---------- */

.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 32px);
  z-index: 150;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-900);
  background: var(--mint);
  border: 2px solid var(--ink-900);
  box-shadow: 5px 5px 0 0 var(--orange);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s linear 0.25s;
}

.to-top[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0s;
}

.to-top:hover { background: var(--text); }

/* ---------- 9. 通用组件 ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mute);
}

.breadcrumb li { display: flex; align-items: center; }

.breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--line);
}

.breadcrumb a { color: var(--mint); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--text);
  background: transparent;
  border: 2px solid var(--line);
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 0 var(--line);
}

.btn--primary {
  color: var(--ink-900);
  background: var(--mint);
  border-color: var(--mint);
}

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

.btn--accent {
  color: #FFFFFF;
  background: linear-gradient(135deg, var(--violet-a), var(--violet-b));
  border-color: transparent;
}

.btn--accent:hover { box-shadow: 5px 5px 0 0 rgba(194, 75, 255, 0.4); }

.plate {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-700);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.plate__label {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ink-900);
  background: var(--mint);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-mute);
  background: rgba(27, 36, 80, 0.7);
  border: 1px solid var(--line);
}

.tag--live {
  color: var(--ink-900);
  background: var(--mint);
  border-color: var(--mint);
}

.tag--warn {
  color: var(--ink-900);
  background: var(--amber);
  border-color: var(--amber);
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.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, 5fr); }

.media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--ink-700), var(--ink-800));
  border: 2px solid var(--line);
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(1.06) contrast(1.03);
}

.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  background: rgba(7, 11, 34, 0.84);
  border-top: 2px solid var(--line);
  border-right: 2px solid var(--line);
}

.side-note {
  writing-mode: vertical-rl;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--text-mute);
  border-left: 1px solid var(--line);
}

.spectrum-text {
  background: linear-gradient(
    100deg,
    var(--mint) 0%,
    var(--violet-a) 44%,
    var(--violet-b) 76%,
    var(--orange) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 10. 渐显 / 数字滚动 ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}

/* ---------- 11. 章节索引 ---------- */

[data-toc-link] {
  display: block;
  padding: 8px 12px 8px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-mute);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

[data-toc-link]:hover {
  color: var(--text);
  background: rgba(33, 243, 224, 0.06);
}

[data-toc-link].is-active {
  color: var(--mint);
  border-left-color: var(--orange);
  background: rgba(33, 243, 224, 0.09);
}

/* ---------- 12. 响应式 ---------- */

@media (max-width: 900px) {
  .masthead {
    grid-template-columns: 1fr;
    row-gap: 12px;
  }

  .masthead::before { display: none; }

  .masthead__brand {
    grid-column: 1;
    justify-self: center;
  }

  .masthead__status {
    grid-column: 1;
    justify-self: center;
  }

  .footer-inner { grid-template-columns: 1fr; }

  .footer-cols {
    padding-left: 0;
    padding-top: 26px;
    border-left: 0;
    border-top: 2px solid var(--line);
  }

  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    margin-block: 12px;
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.18em;
    color: var(--mint);
    background: rgba(27, 36, 80, 0.55);
    border: 2px solid var(--line);
    transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  }

  .nav-toggle[aria-expanded="true"] {
    color: var(--ink-900);
    background: var(--mint);
    border-color: var(--mint);
  }

  .nav-toggle__label::before {
    content: "＋";
    margin-right: 8px;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__label::before { content: "－"; }

  .nav-list {
    flex-direction: column;
    flex-wrap: nowrap;
    justify-content: flex-start;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height 0.32s var(--ease), visibility 0s linear 0.32s;
  }

  .main-nav[data-open="true"] .nav-list {
    max-height: 560px;
    visibility: visible;
    transition: max-height 0.36s var(--ease), visibility 0s;
  }

  .nav-list a {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(46, 58, 107, 0.7);
    border-left: 3px solid transparent;
  }

  .nav-list a[aria-current="page"] {
    border-bottom-color: var(--orange);
    border-left-color: var(--orange);
  }

  .utility-row { justify-content: flex-start; gap: 10px; }

  .utility-row__label { display: none; }
}

@media (max-width: 640px) {
  .footer-cols { grid-template-columns: 1fr; }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
  }

  .masthead__status {
    max-width: 100%;
    white-space: normal;
    text-align: center;
  }
}

@media (max-width: 560px) {
  .masthead__brand {
    flex-direction: column;
    gap: 8px;
  }

  .masthead__text { align-items: center; }
}

/* ---------- 13. 减弱动效 ---------- */

@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;
    transition-delay: 0ms !important;
  }

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

  .to-top {
    opacity: 1;
    visibility: hidden;
    transform: none;
  }

  .to-top[data-visible="true"] { visibility: visible; }
}