/* k8体育官网 · 共享样式 /assets/site.css */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd, address { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, picture { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; }
input, textarea { font: inherit; }

:root {
  --ink-900: #07130F;
  --ink-800: #0E211B;
  --ink-700: #16352B;
  --cyan: #35F2C0;
  --cyan-soft: #9FF3DC;
  --paper: #EDF5F1;
  --yellow: #FFD23F;
  --red: #FF4D4D;
  --line: #5C7A70;
  --line-soft: rgba(92, 122, 112, 0.38);
  --rail-w: 236px;
  --bar-h: 62px;
  --pad-x: clamp(18px, 4.6vw, 64px);
  --radius: 18px;
  --radius-sm: 10px;
  --font-display: "Archivo Narrow", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: Inter, "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", Georgia, "SimSun", serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --t: 160ms ease;
}

html { background: var(--ink-900); }
body {
  min-height: 100vh;
  padding-top: var(--bar-h);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: var(--cyan); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(34px, 5vw, 48px); }
h2 { font-size: clamp(26px, 3.6vw, 32px); }
h3 { font-size: clamp(18px, 2.4vw, 20px); }
p { word-break: break-word; }

.mono, .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
}

/* ---------- 骨架 ---------- */
.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: 0;
  padding-inline: var(--pad-x);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(28px, 4vw, 48px); }
.section--lift {
  background: var(--ink-800);
  border-block: 1px solid var(--line-soft);
}
.section--slant { clip-path: polygon(0 0, 100% 2.6%, 100% 100%, 0 100%); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(24px, 3vw, 40px);
}
.section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.section__lead {
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.7;
  color: var(--cyan-soft);
  max-width: 62ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--cyan);
}

.grid { display: grid; gap: clamp(20px, 3vw, 36px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--asym { grid-template-columns: minmax(0, 8fr) minmax(0, 3fr); }

.rule { height: 1px; border: 0; background: var(--line-soft); }

/* ---------- 内容组件 ---------- */
.prose {
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
}
.prose h2 { margin-top: 2em; margin-bottom: 0.6em; }
.prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; color: var(--cyan-soft); }
.prose p + p { margin-top: 1em; }
.prose ul, .prose ol { list-style: disc; padding-left: 1.2em; margin-top: 0.8em; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(53, 242, 192, 0.45);
  text-underline-offset: 3px;
}
.prose a:hover { text-decoration-color: var(--cyan); }
.prose blockquote {
  margin-top: 1.4em;
  padding-left: 18px;
  border-left: 3px solid var(--cyan);
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--cyan-soft);
}
.prose strong { color: var(--cyan-soft); }

.panel {
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 28px);
}
.panel--lift {
  background: linear-gradient(160deg, var(--ink-700), var(--ink-800));
}

.stat { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.stat__unit { font-size: 0.46em; margin-left: 4px; color: var(--cyan-soft); }
.stat__label {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(237, 245, 241, 0.6);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  color: var(--cyan-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.tag--cyan { background: rgba(53, 242, 192, 0.14); border-color: rgba(53, 242, 192, 0.5); color: var(--cyan); }
.tag--yellow { background: rgba(255, 210, 63, 0.14); border-color: rgba(255, 210, 63, 0.55); color: var(--yellow); }
.tag--red { background: rgba(255, 77, 77, 0.14); border-color: rgba(255, 77, 77, 0.55); color: var(--red); }

/* ---------- 图片容器基础规则 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
}
.media > img,
.media > picture > img,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--hero { aspect-ratio: 16 / 9; }
.media--wide { aspect-ratio: 21 / 9; }
.media--card { aspect-ratio: 4 / 3; }
.media--portrait { aspect-ratio: 3 / 4; }
.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(237, 245, 241, 0.62);
}
.media__badge {
  position: absolute;
  left: 14px;
  top: 14px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(7, 19, 15, 0.72);
  border: 1px solid rgba(53, 242, 192, 0.45);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--t), border-color var(--t), color var(--t), transform var(--t);
}
.btn:hover { transform: translateY(-2px); }
.btn--solid { background: var(--cyan); border-color: var(--cyan); color: #04211A; }
.btn--solid:hover { background: var(--cyan-soft); border-color: var(--cyan-soft); }
.btn--ghost { background: transparent; border-color: rgba(53, 242, 192, 0.45); color: var(--cyan); }
.btn--ghost:hover { background: rgba(53, 242, 192, 0.1); border-color: var(--cyan); }
.btn--warn { background: var(--yellow); border-color: var(--yellow); color: #241A00; }
.btn--warn:hover { background: #FFDE72; border-color: #FFDE72; }

/* ---------- 面包屑 ---------- */
.breadcrumb { margin-block: 18px 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(237, 245, 241, 0.6);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__link { color: var(--cyan-soft); text-decoration: none; }
.breadcrumb__link:hover { color: var(--cyan); text-decoration: underline; }
.breadcrumb__sep { color: var(--line); }
.breadcrumb__current { color: var(--paper); }

/* ---------- 页头：侧边轨道 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  transform: translateY(-160%);
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--t);
}
.skip-link:focus { transform: translateY(0); }

.site-rail {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  height: var(--bar-h);
  background: linear-gradient(180deg, #07130F 0%, #0B1A15 60%, #0E211B 100%);
  border-bottom: 1px solid var(--line-soft);
}
.rail__inner {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 14px 0 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
  color: var(--paper);
  border-radius: 8px;
}
.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  border-radius: 11px 11px 11px 3px;
  background: var(--cyan);
  color: #04211A;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: -0.02em;
}
.brand__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand__sub {
  display: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: rgba(159, 243, 220, 0.72);
}

.rail__toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  min-width: 44px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  color: var(--cyan-soft);
  cursor: pointer;
  transition: border-color var(--t), color var(--t), background-color var(--t);
}
.rail__toggle:hover { border-color: var(--cyan); color: var(--cyan); background: rgba(53, 242, 192, 0.08); }
.rail__toggle-text { font-size: 14px; font-weight: 700; letter-spacing: 0.08em; }
.rail__toggle-bars { position: relative; display: block; width: 20px; height: 2px; background: var(--cyan); transition: background-color var(--t); }
.rail__toggle-bars::before,
.rail__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--t);
}
.rail__toggle-bars::before { top: -6px; }
.rail__toggle-bars::after { top: 6px; }
.rail__toggle[aria-expanded="true"] .rail__toggle-bars { background: transparent; }
.rail__toggle[aria-expanded="true"] .rail__toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.rail__toggle[aria-expanded="true"] .rail__toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

.rail__nav {
  position: fixed;
  top: var(--bar-h);
  left: 0;
  bottom: 0;
  z-index: 59;
  width: min(84vw, 332px);
  padding: 22px 20px 30px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  background: var(--ink-800);
  border-right: 1px solid rgba(53, 242, 192, 0.28);
  visibility: hidden;
  transform: translateX(-104%);
  transition: transform 220ms ease, visibility 220ms;
}
.rail__nav[data-open] { visibility: visible; transform: translateX(0); }

.rail__list { display: flex; flex-direction: column; gap: 4px; }
.rail__item { display: block; }
.rail__link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) 3px;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  color: rgba(237, 245, 241, 0.76);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: background-color var(--t), color var(--t), border-color var(--t), transform var(--t);
}
.rail__index { font-family: var(--font-mono); font-size: 11.5px; color: var(--line); transition: color var(--t); }
.rail__label { min-width: 0; }
.rail__track {
  display: block;
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: rgba(92, 122, 112, 0.5);
  transition: background-color var(--t), box-shadow var(--t);
}
.rail__link:hover {
  background: rgba(53, 242, 192, 0.08);
  border-color: rgba(53, 242, 192, 0.28);
  color: var(--paper);
  transform: translateX(2px);
}
.rail__link:hover .rail__index { color: var(--cyan-soft); }
.rail__link[aria-current="page"] {
  background: rgba(53, 242, 192, 0.1);
  border-color: rgba(53, 242, 192, 0.35);
  color: var(--cyan);
}
.rail__link[aria-current="page"] .rail__index { color: var(--cyan); }
.rail__link[aria-current="page"] .rail__track {
  background: var(--cyan);
  box-shadow: 0 0 12px rgba(53, 242, 192, 0.6);
  animation: railBreath 3.2s ease-in-out infinite;
}
@keyframes railBreath {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.rail__note {
  padding-left: 12px;
  border-left: 2px solid rgba(53, 242, 192, 0.5);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.75;
  color: rgba(237, 245, 241, 0.55);
}
.rail__utility { display: flex; flex-direction: column; gap: 8px; }
.rail__util-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(53, 242, 192, 0.4);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transition: background-color var(--t), border-color var(--t);
}
.rail__util-link:hover { background: rgba(53, 242, 192, 0.12); border-color: var(--cyan); }

.rail__scrim {
  position: fixed;
  inset: var(--bar-h) 0 0 0;
  z-index: 58;
  background: rgba(4, 12, 10, 0.62);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 200ms ease, visibility 200ms;
}
.rail__nav[data-open] + .rail__scrim { opacity: 1; visibility: visible; pointer-events: auto; }

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 112px);
  padding: clamp(64px, 8vw, 96px) 0 40px;
  color: rgba(237, 245, 241, 0.82);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, #0E211B 0%, #0B1A15 60%, #091713 100%);
  clip-path: polygon(0 34px, 100% 0, 100% 100%, 0 100%);
}
.site-footer > * { position: relative; z-index: 1; }

.footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 3vw, 40px);
  padding-bottom: clamp(32px, 4vw, 48px);
}
.footer__brand { min-width: 0; }
.footer__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.footer__brand-text {
  margin-top: 12px;
  max-width: 34ch;
  font-family: var(--font-serif);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(159, 243, 220, 0.78);
}
.footer__mini {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(237, 245, 241, 0.5);
}
.footer__col { min-width: 0; }
.footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  display: inline-block;
  font-size: 15px;
  color: rgba(237, 245, 241, 0.76);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t), border-color var(--t);
}
.footer__link:hover { color: var(--cyan); border-bottom-color: rgba(53, 242, 192, 0.5); }

.footer__meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}
.footer__contact { font-size: 14.5px; color: rgba(237, 245, 241, 0.72); }
.footer__note { font-size: 13px; color: rgba(159, 243, 220, 0.7); }
.footer__legal {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(237, 245, 241, 0.55);
}

/* ---------- 脚本注入组件 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-soft));
}
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 80;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid rgba(53, 242, 192, 0.45);
  background: rgba(7, 19, 15, 0.88);
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--t), transform var(--t), visibility var(--t), border-color var(--t);
}
.to-top[data-visible] { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { border-color: var(--cyan); }

html.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 240ms ease, transform 240ms ease;
}
html.has-js [data-reveal].is-revealed { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 959px) {
  .brand__sub { display: none; }
  .rail__scrim { display: block; }
}

@media (min-width: 600px) and (max-width: 959px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 899px) {
  .grid--asym, .grid--3 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 639px) {
  .grid--2 { grid-template-columns: minmax(0, 1fr); }
}

@media (min-width: 960px) {
  body { padding-top: 0; padding-left: var(--rail-w); }

  .site-rail {
    top: 0;
    left: 0;
    bottom: 0;
    right: auto;
    width: var(--rail-w);
    height: auto;
    border-bottom: 0;
    border-right: 1px solid var(--line-soft);
  }
  .rail__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 26px;
    padding: 28px 22px 24px;
    overflow-y: auto;
  }
  .brand__mark { flex-basis: 40px; width: 40px; height: 40px; border-radius: 12px 12px 12px 4px; font-size: 17px; }
  .brand__name { font-size: 19px; }
  .brand__sub { display: block; }

  .rail__toggle { display: none; }

  .rail__nav {
    position: static;
    width: auto;
    padding: 0;
    border: 0;
    background: none;
    overflow: visible;
    visibility: visible;
    transform: none;
    transition: none;
    flex: 1;
    gap: 22px;
  }
  .rail__note { margin-top: auto; }
  .rail__scrim { display: none; }

  .scroll-progress { left: var(--rail-w); }
}

@media (max-width: 1023px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 599px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .to-top { right: 14px; bottom: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .rail__link[aria-current="page"] .rail__track { animation: none; }
  html.has-js [data-reveal] { opacity: 1; transform: none; }
}