/* ==========================================================================
   欧皇体育 · 共享样式 /assets/site.css
   赛博竞技场 × 复古街机厅 · 黑金主调 · 粗野主义边框
   ========================================================================== */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption,
blockquote, dl, dt, dd, address {
  margin: 0;
}

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

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

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

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

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* --- 2. 变量 ------------------------------------------------------------ */
:root {
  --ink: #0B0E13;
  --ink-2: #141924;
  --ink-3: #1B2230;
  --gold: #D8A62B;
  --paper: #F3E7D2;
  --cyan: #15E3D4;
  --magenta: #FF3D8B;
  --lemon: #A6F14A;
  --mist: #A9B3C4;
  --iron: #5B6472;
  --hard: #241A08;

  --font-display: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", "Heiti SC", sans-serif;
  --font-body: var(--font-display);
  --font-mono: "JetBrains Mono", "Sarasa Mono SC", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;

  --line-soft: 1px solid rgba(169, 179, 196, 0.26);
  --line-faint: 1px solid rgba(169, 179, 196, 0.14);
  --border: 3px solid var(--iron);
  --shadow-hard: 8px 8px 0 var(--hard);
  --shadow-tight: 3px 3px 0 var(--hard);

  --dur: 200ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
}

/* --- 3. 基础排版 -------------------------------------------------------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

strong, b { font-weight: 700; color: var(--gold); }

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

/* --- 4. 容器与跳转 ------------------------------------------------------ */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.wrap--narrow { max-width: 820px; }

.skip-link {
  position: absolute;
  top: 0;
  left: -9999px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 3px solid var(--hard);
}

.skip-link:focus {
  left: 16px;
  top: 12px;
}

/* --- 5. 滚动进度条 ------------------------------------------------------ */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 150;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--gold) 55%, var(--magenta));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* --- 6. 页头 ------------------------------------------------------------ */
.site-header {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-bottom: var(--border);
}

.masthead {
  position: relative;
  border-bottom: 1px solid rgba(169, 179, 196, 0.18);
}

.masthead::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 7px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--iron) 0 1px,
    transparent 1px 16px
  );
  opacity: 0.45;
  pointer-events: none;
}

.masthead__frame {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 20px var(--gutter) 18px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
}

.masthead__note {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--mist);
}

.masthead__brand {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 12px;
  color: var(--gold);
}

.masthead__mark {
  width: 13px;
  height: 13px;
  flex: none;
  background: var(--magenta);
  box-shadow: 3px 3px 0 var(--hard);
  transform: rotate(45deg);
  transition: background-color var(--dur) var(--ease);
}

.masthead__brand:hover .masthead__mark { background: var(--cyan); }

.masthead__name {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 900;
  letter-spacing: 0.01em;
  line-height: 1.1;
  color: var(--gold);
}

.masthead__utility {
  justify-self: end;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 6px 14px;
}

.masthead__utility a {
  display: inline-block;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  border-bottom: 1px dashed rgba(169, 179, 196, 0.5);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.masthead__utility a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* --- 7. 导航 ------------------------------------------------------------ */
.site-nav {
  position: relative;
  background: var(--ink);
}

.site-nav__toggle {
  display: none;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px var(--gutter);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--paper);
  border-bottom: var(--line-faint);
}

.site-nav__toggle-bars {
  position: relative;
  display: block;
  width: 20px;
  height: 2px;
  flex: none;
  background: var(--gold);
  transition: background-color var(--dur) var(--ease);
}

.site-nav__toggle-bars::before,
.site-nav__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--gold);
  transition: transform var(--dur) var(--ease);
}

.site-nav__toggle-bars::before { top: -6px; }
.site-nav__toggle-bars::after { top: 6px; }

.site-nav[data-open] .site-nav__toggle-bars { background: transparent; }
.site-nav[data-open] .site-nav__toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}
.site-nav[data-open] .site-nav__toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

.site-nav__toggle-text { color: var(--mist); }

.site-nav__list {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 0 var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  justify-content: center;
}

.site-nav__item { display: flex; }

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 15px 18px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 9px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.site-nav__link:hover { color: var(--cyan); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__link[aria-current="page"] { color: var(--gold); }
.site-nav__link[aria-current="page"]::after {
  background: var(--gold);
  transform: scaleX(1);
}

/* --- 8. 页脚 ------------------------------------------------------------ */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--ink-2);
  color: var(--paper);
  border-top: var(--border);
}

.site-footer__beam {
  height: 10px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--gold) 0 3px,
    transparent 3px 26px
  );
  background-color: var(--hard);
}

.site-footer__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 56px) var(--gutter) 28px;
}

.site-footer__brand {
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--gold);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 48px);
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: clamp(24px, 4vw, 36px);
  border-top: var(--line-soft);
}

.site-footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.site-footer__links li + li { margin-top: 10px; }

.site-footer__links a {
  display: inline-block;
  padding-bottom: 1px;
  font-size: 15px;
  color: var(--paper);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.site-footer__links a:hover {
  color: var(--gold);
  border-color: var(--gold);
}

.site-footer__contact li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-footer__contact li + li { margin-top: 14px; }

.site-footer__contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--iron);
}

.site-footer__contact-value {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--mist);
  word-break: break-word;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 24px;
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: 18px;
  border-top: var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.site-footer__legal { color: var(--mist); }

.site-footer__copy { color: var(--mist); }

.site-footer__note {
  flex: 1 1 100%;
  color: var(--iron);
  line-height: 1.7;
}

/* --- 9. 按钮 ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.2;
  color: var(--gold);
  background: transparent;
  border: 3px solid var(--gold);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    background-color var(--dur) var(--ease), color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.btn:hover {
  background: var(--gold);
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: var(--shadow-tight);
}

.btn--gold {
  background: var(--gold);
  color: var(--ink);
}

.btn--gold:hover {
  background: var(--paper);
  border-color: var(--paper);
}

.btn--ghost {
  border-color: var(--iron);
  color: var(--mist);
}

.btn--ghost:hover {
  background: transparent;
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: var(--shadow-tight);
}

.btn--block { width: 100%; }

/* --- 10. 面包屑 --------------------------------------------------------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.crumbs a {
  color: var(--mist);
  border-bottom: 1px dashed rgba(169, 179, 196, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.crumbs a:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

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

.crumbs [aria-current="page"] { color: var(--gold); }

/* --- 11. 网格 ----------------------------------------------------------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 32px);
}

.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: 7fr 5fr; }
.grid--split-rev { grid-template-columns: 5fr 7fr; }

/* --- 12. 卡片 / 面板 ---------------------------------------------------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-2);
  border: 3px solid var(--iron);
  box-shadow: var(--shadow-hard);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.panel:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-tight);
  border-color: var(--gold);
}

/* --- 13. 图片容器 ------------------------------------------------------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(21, 227, 212, 0.09), transparent 58%),
    linear-gradient(315deg, rgba(255, 61, 139, 0.09), transparent 58%),
    var(--ink-2);
  border: 3px solid var(--iron);
  box-shadow: var(--shadow-hard);
}

.media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: var(--ink);
  border-top: 3px solid var(--iron);
  border-right: 3px solid var(--iron);
}

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--portrait { aspect-ratio: 3 / 4; }

/* --- 14. 标签 / 注释 / 数据 --------------------------------------------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.4;
  color: var(--mist);
  border: 1px solid var(--iron);
}

.tag--gold { border-color: var(--gold); color: var(--gold); }
.tag--cyan { border-color: var(--cyan); color: var(--cyan); }
.tag--magenta { border-color: var(--magenta); color: var(--magenta); }
.tag--lemon { border-color: var(--lemon); color: var(--lemon); }

.annot {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--mist);
}

.annot--edge {
  position: absolute;
  top: 14px;
  right: -14px;
  writing-mode: vertical-rl;
  letter-spacing: 0.24em;
  color: var(--iron);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 56px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.tickline {
  width: 100%;
  height: 8px;
  background-image: repeating-linear-gradient(
    90deg,
    var(--iron) 0 1px,
    transparent 1px 18px
  );
  opacity: 0.6;
}

/* --- 15. 章节标题条 ----------------------------------------------------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 24px;
  margin-bottom: clamp(20px, 3vw, 36px);
  padding-top: 22px;
  border-top: var(--line-soft);
}

.section-head__title {
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.08;
  color: var(--paper);
}

.section-head__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* --- 16. 正文长文 ------------------------------------------------------- */
.prose {
  max-width: 70ch;
  font-size: 17px;
  line-height: 1.75;
  color: rgba(243, 231, 210, 0.9);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--paper);
}

.prose h2 {
  margin-top: 1.7em;
  font-size: clamp(22px, 2.6vw, 30px);
}

.prose h3 {
  margin-top: 1.4em;
  font-size: clamp(18px, 2vw, 22px);
}

.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(21, 227, 212, 0.45);
  transition: border-color var(--dur) var(--ease);
}

.prose a:hover { border-color: var(--cyan); }

.prose ul,
.prose ol { padding-left: 1.3em; }

.prose li { margin-top: 0.4em; list-style: disc; }
.prose ol li { list-style: decimal; }

.prose code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--lemon);
}

.prose blockquote {
  padding-left: 16px;
  color: var(--mist);
  border-left: 3px solid var(--magenta);
}

/* --- 17. 响应式 --------------------------------------------------------- */
@media (max-width: 1100px) {
  .masthead__frame { gap: 12px; }
  .site-nav__link { padding: 14px 14px; }
  .site-nav__link::after { left: 14px; right: 14px; }
}

@media (max-width: 900px) {
  .masthead__frame {
    grid-template-columns: 1fr;
    justify-items: center;
    gap: 10px;
    padding: 18px var(--gutter) 16px;
    text-align: center;
  }

  .masthead__note {
    justify-self: center;
    text-align: center;
  }

  .masthead__brand { justify-self: center; }

  .masthead__utility {
    justify-self: center;
    justify-content: center;
  }

  .site-nav__toggle { display: flex; }

  .site-nav__list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px var(--gutter) 18px;
  }

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

  .site-nav__item {
    width: 100%;
    border-bottom: var(--line-faint);
  }

  .site-nav__item:last-child { border-bottom: 0; }

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 2px;
    font-size: 16px;
  }

  .site-nav__link::after {
    left: 2px;
    right: auto;
    bottom: 8px;
    width: 32px;
  }

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

  .section-head__note { margin-left: 0; }

  .annot--edge {
    position: static;
    writing-mode: horizontal-tb;
    letter-spacing: 0.08em;
  }
}

@media (max-width: 760px) {
  .site-footer__grid { grid-template-columns: 1fr; }

  .site-footer__meta { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .masthead__utility { gap: 6px 10px; }
  .masthead__utility a { font-size: 11px; }
  .btn { padding: 11px 16px; font-size: 12px; }
}

/* --- 18. 动效降级 ------------------------------------------------------- */
@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;
  }

  .panel:hover,
  .btn:hover { transform: none; }

  .scroll-progress { display: none; }
}