/* ============================================================
   K1体育 · 中文专区  /assets/site.css
   共享外壳：reset、变量、中文排版、页头轨道、页脚、通用组件
   ============================================================ */

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { font-weight: 900; line-height: 1.15; }
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--green); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 2px; }

/* ---------- 变量 ---------- */
:root {
  --ink: #05070A;
  --ink-2: #0E1319;
  --line: #1A2029;
  --graphite: #2A323D;
  --green: #C6FF00;
  --blue: #00E5FF;
  --orange: #FF5C22;
  --white: #E8EDF2;
  --muted: #8A97A6;
  --teal: #0B2226;
  --green-glow: rgba(198, 255, 0, 0.12);
  --blue-glow: rgba(0, 229, 255, 0.14);

  --rail-w: 88px;
  --bar-h: 56px;
  --ticker-h: 38px;
  --maxw: 1320px;
  --cut: 16px;

  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Archivo Black", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", monospace;

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

/* ---------- 基础排版 ---------- */
html { font-size: 100%; }
body {
  min-height: 100%;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.01em;
  padding-top: calc(var(--bar-h) + var(--ticker-h));
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(232, 237, 242, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 237, 242, 0.055) 1px, transparent 1px);
  background-size: 72px 72px;
}
p { max-width: 72ch; }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: 0.04em; }
.muted { color: var(--muted); }
.stack { display: flex; flex-direction: column; gap: 16px; }
.divider-45 {
  height: 10px;
  border: 0;
  background: repeating-linear-gradient(45deg, var(--line) 0 2px, transparent 2px 10px);
}

/* ---------- 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--green);
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  border-radius: 3px;
  transition: top 0.18s ease-out;
}
.skip-link:focus { top: 14px; color: var(--ink); }

/* ---------- 阅读进度 ---------- */
.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 130;
  background: linear-gradient(90deg, var(--green) 0%, var(--blue) 100%);
  transition: width 0.12s linear;
}

/* ---------- 页头容器 ---------- */
.site-header { position: relative; z-index: 70; }

/* ---------- 移动顶栏 ---------- */
.site-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 10px;
  height: var(--bar-h);
  padding: 0 14px;
  background: rgba(5, 7, 10, 0.94);
  border-bottom: 1px solid var(--line);
}
.site-bar__brand {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--white);
  white-space: nowrap;
}
.site-bar__brand:hover { color: var(--green); }
.site-bar__meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
  border: 1px solid rgba(255, 92, 34, 0.45);
  border-radius: 3px;
  padding: 2px 6px;
}

/* ---------- 菜单按钮 ---------- */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--white);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.18s ease-out, color 0.18s ease-out;
}
.nav-toggle:hover { border-color: var(--green); color: var(--green); }
.nav-toggle__bars {
  display: inline-block;
  width: 16px;
  height: 10px;
  background:
    linear-gradient(var(--green), var(--green)) 0 0 / 100% 2px no-repeat,
    linear-gradient(var(--white), var(--white)) 0 4px / 100% 2px no-repeat,
    linear-gradient(var(--blue), var(--blue)) 0 8px / 100% 2px no-repeat;
  transition: opacity 0.18s ease-out;
}
.nav-toggle[aria-expanded="true"] { border-color: var(--green); color: var(--green); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { opacity: 0.4; }

/* ---------- 侧边品牌轨道 ---------- */
.site-rail { position: static; }
.rail__inner { display: block; }
.rail__brand-wrap { display: none; }

/* 导航（移动端为全屏抽屉） */
.rail__nav {
  position: fixed;
  inset: 0;
  z-index: 95;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: calc(20px + env(safe-area-inset-top)) 20px calc(24px + env(safe-area-inset-bottom));
  background: var(--ink);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform 0.24s ease-out, visibility 0.24s ease-out;
}
.rail__nav[data-open] { transform: translateX(0); visibility: visible; }

.rail__drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.rail__drawer-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.rail__close {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--white);
  font-size: 13px;
  padding: 6px 12px;
  cursor: pointer;
  transition: border-color 0.18s ease-out, color 0.18s ease-out;
}
.rail__close:hover { border-color: var(--blue); color: var(--blue); }

.rail__nav-list { display: flex; flex-direction: column; gap: 2px; margin-top: 8px; }
.rail__nav-item { display: block; }
.rail__link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 12px;
  color: var(--white);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--line);
  transition: color 0.18s ease-out;
}
.rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14%;
  bottom: 14%;
  width: 3px;
  background: var(--green);
  opacity: 0;
  transform: scaleY(0.35);
  transition: opacity 0.18s ease-out, transform 0.18s ease-out;
}
.rail__link:hover { color: var(--green); }
.rail__link:hover::before,
.rail__link[aria-current="page"]::before { opacity: 1; transform: scaleY(1); }
.rail__link[aria-current="page"] { color: var(--green); }
.rail__link-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.rail__link-label { display: inline; }

.rail__actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.rail__drawer-foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}
.rail__drawer-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--graphite);
  margin-bottom: 4px;
}
.rail__drawer-line { font-family: var(--font-mono); font-size: 13px; word-break: break-all; }
.rail__drawer-link { color: var(--blue); font-size: 14px; margin-top: 6px; }
.rail__drawer-link:hover { color: var(--green); }

/* 遮罩 */
.rail__scrim {
  position: fixed;
  inset: 0;
  z-index: 92;
  background: rgba(5, 7, 10, 0.72);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.24s ease-out, visibility 0.24s ease-out;
}
.rail__scrim[data-open] { opacity: 1; visibility: visible; }
html.nav-open { overflow: hidden; }

/* ---------- 数据条带 ---------- */
.ticker {
  position: fixed;
  left: 0;
  right: 0;
  top: var(--bar-h);
  z-index: 80;
  display: flex;
  align-items: center;
  height: var(--ticker-h);
  overflow: hidden;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
  border-left: 2px solid var(--green);
}
.ticker__track {
  display: flex;
  align-items: center;
  gap: 48px;
  padding-left: 20px;
  white-space: nowrap;
  will-change: transform;
  animation: ticker-scroll 46s linear infinite;
}
.ticker:hover .ticker__track { animation-play-state: paused; }
.ticker__item {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.ticker__item::before { content: "//"; color: var(--blue); margin-right: 8px; }
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 桌面：轨道成型 ---------- */
@media (min-width: 1024px) {
  body {
    padding-top: var(--ticker-h);
    padding-left: var(--rail-w);
  }
  .site-bar { display: none; }
  .nav-toggle { display: none; }
  .rail__scrim { display: none; }

  .site-rail {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 90;
    width: var(--rail-w);
    background: var(--ink-2);
    border-right: 1px solid var(--line);
  }
  .rail__inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 22px 0;
    overflow-y: auto;
    scrollbar-width: none;
  }
  .rail__inner::-webkit-scrollbar { display: none; }

  .rail__brand-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
  }
  .rail__brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }
  .rail__brand-mark {
    font-family: var(--font-mono);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: var(--green);
    line-height: 1;
  }
  .rail__brand-text {
    writing-mode: vertical-rl;
    font-size: 12px;
    letter-spacing: 0.16em;
    color: var(--white);
  }
  .rail__brand:hover .rail__brand-text { color: var(--green); }
  .rail__version {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.16em;
    color: var(--orange);
    border: 1px solid rgba(255, 92, 34, 0.45);
    border-radius: 3px;
    padding: 3px 5px;
  }
  .rail__note {
    writing-mode: vertical-rl;
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--muted);
    opacity: 0.75;
    transition: opacity 0.24s ease-out, transform 0.24s ease-out;
  }
  html[data-scrolled] .rail__note { opacity: 0; transform: translateY(-6px); }

  .rail__nav {
    position: static;
    inset: auto;
    transform: none;
    visibility: visible;
    background: transparent;
    border-right: 0;
    overflow: visible;
    padding: 0;
    width: 100%;
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
  }
  .rail__drawer-head,
  .rail__drawer-foot { display: none; }

  .rail__nav-list {
    flex-direction: column;
    align-items: center;
    gap: 0;
    margin-top: 0;
  }
  .rail__nav-item { display: block; }
  .rail__link {
    display: block;
    writing-mode: vertical-rl;
    text-align: center;
    padding: 11px 6px;
    border-bottom: 0;
    font-size: 13px;
    letter-spacing: 0.14em;
    border-radius: 2px;
  }
  .rail__link::before { left: -6px; top: 10%; bottom: 10%; width: 2px; }
  .rail__link-index { display: none; }

  .rail__actions {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid var(--line);
    width: 100%;
  }
  .rail__actions .btn {
    writing-mode: vertical-rl;
    text-align: center;
    padding: 14px 7px;
    font-size: 12px;
    letter-spacing: 0.14em;
    line-height: 1;
    border-radius: 2px;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  border: 1px solid transparent;
  border-radius: 3px;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn--primary { background: var(--green); color: var(--ink); }
.btn--primary:hover { background: var(--blue); color: var(--ink); }
.btn--ghost { background: transparent; color: var(--white); border-color: var(--line); }
.btn--ghost:hover { color: var(--blue); border-color: var(--blue); }
.btn--block { width: 100%; }

/* ---------- 容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
@media (min-width: 768px) {
  .container { padding-left: 32px; padding-right: 32px; }
}
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(228px, 1fr)); }
@media (min-width: 768px) {
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-12 { grid-column: span 12; }
}

/* ---------- 区块 ---------- */
.section { position: relative; padding: clamp(44px, 7vw, 96px) 0; }
.section__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 780px;
  margin-bottom: clamp(24px, 4vw, 48px);
}
.section__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--white);
}
.section__lead { color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.125rem); }

/* ---------- 面板 ---------- */
.panel {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: clamp(20px, 3vw, 32px);
}
.panel--cut {
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.panel--teal { background: var(--teal); border-color: #14343A; }
.panel__title {
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 1.9vw, 1.4rem);
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.panel__text { color: var(--muted); font-size: 15px; }

/* ---------- 数据刻度 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1;
  color: var(--green);
  text-align: right;
}
.stat__unit {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.stat__label { font-size: 14px; color: var(--muted); }

/* ---------- 筛选 chip ---------- */
.chip-set { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  transition: color 0.18s ease-out, border-color 0.18s ease-out, background-color 0.18s ease-out;
}
.chip:hover { color: var(--white); border-color: var(--graphite); }
.chip[aria-pressed="true"] { background: var(--green-glow); border-color: var(--green); color: var(--green); }

/* ---------- 面包屑 ---------- */
.breadcrumb { padding: 20px 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: var(--graphite); }
.breadcrumb__link { color: var(--muted); }
.breadcrumb__link:hover { color: var(--blue); }

/* ---------- 图片容器（页面阶段放置占位图） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.08) brightness(0.86);
}
.media-frame__scan {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 38%, rgba(198, 255, 0, 0.18) 50%, transparent 62%);
}
.media-frame--blue .media-frame__scan {
  background: linear-gradient(115deg, transparent 38%, rgba(0, 229, 255, 0.18) 50%, transparent 62%);
}
.media-frame__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 4px 10px;
  background: var(--green);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
}

/* ---------- 显现动效协议 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.24s ease-out, transform 0.24s ease-out;
}
.js [data-reveal][data-visible] { opacity: 1; transform: none; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--ink-2);
  border-top: 1px solid var(--line);
}
.footer__rule {
  height: 6px;
  background: repeating-linear-gradient(45deg, var(--green) 0 10px, transparent 10px 20px, var(--blue) 20px 30px, transparent 30px 40px);
  opacity: 0.35;
}
.footer__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(32px, 6vw, 64px) 20px clamp(24px, 4vw, 40px);
}
@media (min-width: 768px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { padding-left: 32px; padding-right: 32px; }
}
@media (min-width: 1024px) {
  .footer__grid { grid-template-columns: 1.5fr 1fr 1fr 1.7fr; }
}

.footer__mark {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--white);
}
.footer__slogan {
  margin-top: 12px;
  font-size: clamp(1.05rem, 1.8vw, 1.4rem);
  font-weight: 500;
  line-height: 1.55;
  color: var(--white);
  max-width: 24ch;
}
.footer__version {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.footer__col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin-bottom: 16px;
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  color: var(--white);
  opacity: 0.86;
  transition: color 0.18s ease-out, opacity 0.18s ease-out;
}
.footer__link::before {
  content: "";
  width: 0;
  height: 1px;
  background: var(--green);
  transition: width 0.18s ease-out;
}
.footer__link:hover { color: var(--green); opacity: 1; }
.footer__link:hover::before { width: 12px; }

.footer__contact { display: grid; gap: 12px; }
.footer__contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.footer__contact dd {
  margin-top: 2px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--white);
  word-break: break-word;
}

.footer__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 20px 32px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
@media (min-width: 768px) {
  .footer__meta { padding-left: 32px; padding-right: 32px; }
}
.footer__policy { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.footer__policy a { color: var(--muted); }
.footer__policy a:hover { color: var(--blue); }

/* ---------- 降级动效 ---------- */
@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;
  }
  .ticker__track { animation: none; transform: none; }
  .js [data-reveal] { opacity: 1 !important; transform: none !important; }
}