/* ==========================================================================
   AK赛场 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头部侧边轨道 / 页脚 / 通用组件
   ========================================================================== */

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

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

body { margin: 0; }

h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote {
  margin: 0;
}

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

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

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

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

table {
  border-collapse: collapse;
  width: 100%;
}

/* ---------- 2. Tokens ---------- */
:root {
  --ink: #07111F;
  --ink-2: #0E1B2E;
  --glass: #14314F;
  --orange: #FF6A2A;
  --cyan: #2BE4D0;
  --violet: #7A5CFF;
  --lime: #B6FF3B;
  --mist: #E9F0F7;
  --steel: #7C8CA3;
  --alert: #FF4D6D;

  --rail-w: 120px;
  --base-max: 1280px;

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

  --line: rgba(124, 140, 163, 0.28);
  --line-soft: rgba(233, 240, 247, 0.1);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 3. 基础排版与整站底纹 ---------- */
body {
  min-height: 100vh;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0.01em;
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 640px at 88% -8%, rgba(122, 92, 255, 0.2), transparent 62%),
    radial-gradient(900px 540px at -6% 16%, rgba(43, 228, 208, 0.1), transparent 58%),
    linear-gradient(rgba(233, 240, 247, 0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 240, 247, 0.032) 1px, transparent 1px);
  background-size: auto, auto, 72px 72px, 72px 72px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--mist);
}

h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.75rem); }

p {
  max-width: 34em;
}

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

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  border-radius: 2px;
  background: var(--orange);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  transition: top 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 14px;
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 5. 阅读进度条 ---------- */
.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 130;
  background: rgba(233, 240, 247, 0.07);
  pointer-events: none;
}

.scroll-meter i {
  display: block;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange) 0%, var(--cyan) 58%, var(--violet) 100%);
}

/* ---------- 6. 移动端固定顶栏 ---------- */
.masthead {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 60px;
  padding: 12px 18px;
  background: rgba(7, 17, 31, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.masthead__brand {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
}

.masthead__mark {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -0.06em;
  color: var(--orange);
}

.masthead__name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--mist);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

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

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background 0.18s var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease);
}

.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 7. 遮罩 ---------- */
.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(7, 17, 31, 0.74);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s var(--ease);
}

.rail-scrim[data-open] {
  opacity: 1;
  pointer-events: auto;
}

/* ---------- 8. 侧边轨道 / 抽屉导航 ---------- */
.rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: 86vw;
  max-width: 340px;
  padding: 26px 22px 30px;
  background:
    linear-gradient(180deg, rgba(20, 49, 79, 0.45), rgba(14, 27, 46, 0.96) 42%),
    var(--ink-2);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(-100%);
  visibility: hidden;
  transition: transform 0.3s var(--ease), visibility 0s linear 0.3s;
}

.rail[data-open] {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.3s var(--ease), visibility 0s linear 0s;
}

.rail__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-soft);
}

.rail__mark {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: -0.06em;
  background: linear-gradient(135deg, var(--orange) 8%, var(--cyan) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.rail__name {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.34em;
  color: var(--steel);
}

.rail__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease),
    background 0.18s var(--ease);
}

.rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--steel);
  transition: color 0.18s var(--ease);
}

.rail__label {
  line-height: 1.2;
}

.rail__link:hover,
.rail__link:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(43, 228, 208, 0.08);
}

.rail__link:hover .rail__num { color: var(--cyan); }

.rail__link[aria-current="page"] {
  color: var(--mist);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(255, 106, 42, 0.18), transparent 76%);
}

.rail__link[aria-current="page"] .rail__num {
  color: var(--orange);
  font-weight: 700;
}

/* ---------- 9. 联赛切换 ---------- */
.rail__league {
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.league-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 12px;
  border: 1px solid rgba(43, 228, 208, 0.3);
  border-radius: 2px;
  background: rgba(20, 49, 79, 0.62);
  color: var(--mist);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.league-toggle:hover,
.league-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  background: rgba(43, 228, 208, 0.12);
}

.league-toggle__kicker {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.league-toggle__value {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--mist);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.league-toggle__caret {
  flex: none;
  width: 7px;
  height: 7px;
  margin-left: auto;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.22s var(--ease), border-color 0.18s var(--ease);
}

.league-toggle[aria-expanded="true"] .league-toggle__caret {
  border-color: var(--cyan);
  transform: rotate(-135deg) translateY(-2px);
}

.league-panel {
  display: none;
  margin-top: 8px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(7, 17, 31, 0.94);
}

.league-panel[data-open] { display: block; }

.league-panel__title {
  max-width: none;
  padding: 4px 8px 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--steel);
}

.league-panel__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.league-panel__opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 9px 10px;
  border-radius: 2px;
  color: var(--mist);
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.league-panel__opt::after {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--steel);
  opacity: 0.5;
  transition: background 0.18s var(--ease), opacity 0.18s var(--ease);
}

.league-panel__opt:hover {
  background: rgba(43, 228, 208, 0.14);
  color: var(--cyan);
}

.league-panel__opt[aria-pressed="true"] {
  color: var(--orange);
  font-weight: 800;
}

.league-panel__opt[aria-pressed="true"]::after {
  background: var(--lime);
  opacity: 1;
}

/* ---------- 10. 轨道底部 ---------- */
.rail__foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.rail-cta {
  display: inline-block;
  padding: 11px 14px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 106, 42, 0.12);
  color: var(--mist);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

.rail-cta:hover,
.rail-cta:focus-visible {
  background: var(--orange);
  border-left-color: var(--lime);
  color: var(--ink);
}

.rail-lang {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--steel);
}

/* ---------- 11. 桌面端轨道形态 ---------- */
@media (max-width: 1179.98px) {
  body { padding-top: 60px; }
}

@media (min-width: 1180px) {
  body { padding-inline-start: var(--rail-w); }

  .masthead { display: none; }

  .rail-scrim { display: none; }

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

  .rail {
    width: var(--rail-w);
    max-width: none;
    gap: 0;
    padding: 20px 12px 18px;
    align-items: stretch;
    transform: none;
    visibility: visible;
    border-right: 1px solid rgba(233, 240, 247, 0.08);
    background:
      linear-gradient(180deg, rgba(20, 49, 79, 0.55), rgba(14, 27, 46, 0.94) 40%),
      var(--ink-2);
    box-shadow: inset -1px 0 0 rgba(43, 228, 208, 0.12);
    transition: none;
  }

  .rail__brand {
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 4px 0 14px;
  }

  .rail__mark { font-size: 23px; }
  .rail__name { font-size: 9px; letter-spacing: 0.32em; }

  .rail__list {
    gap: 0;
    padding-top: 12px;
  }

  .rail__link {
    flex-direction: row;
    align-items: flex-start;
    gap: 7px;
    padding: 9px 4px;
    font-size: 12px;
    letter-spacing: 0.1em;
  }

  .rail__link > span {
    writing-mode: vertical-rl;
    text-orientation: upright;
    line-height: 1.12;
  }

  .rail__num { font-size: 9px; letter-spacing: 0.02em; }
  .rail__label { font-weight: 700; }

  .rail__link[aria-current="page"] {
    background: linear-gradient(180deg, rgba(255, 106, 42, 0.2), transparent 82%);
  }

  .rail__league {
    margin-top: 14px;
    padding-top: 14px;
  }

  .league-toggle {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 8px 6px;
  }

  .league-toggle__kicker { font-size: 9px; letter-spacing: 0.14em; }
  .league-toggle__value { font-size: 11px; white-space: normal; }

  .league-toggle__caret {
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }

  .league-panel { padding: 6px; }
  .league-panel__title { font-size: 9px; padding: 2px 4px 6px; }
  .league-panel__opt { padding: 7px 6px; font-size: 11px; }
  .league-panel__opt::after { display: none; }

  .rail__foot { padding-top: 14px; }

  .rail-cta {
    padding: 9px 6px;
    font-size: 11px;
    line-height: 1.5;
  }
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  padding-top: clamp(36px, 5vw, 60px);
  background:
    linear-gradient(180deg, rgba(20, 49, 79, 0.3), transparent 30%),
    var(--ink-2);
  border-top: 1px solid var(--line-soft);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--orange) 0 16%,
    var(--cyan) 16% 32%,
    var(--violet) 32% 44%,
    rgba(233, 240, 247, 0.08) 44% 100%
  );
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 48px);
  width: 100%;
  max-width: var(--base-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 56px);
}

@media (min-width: 700px) {
  .footer__inner { grid-template-columns: 1.4fr 1fr 1fr; }
}

@media (min-width: 1080px) {
  .footer__inner { grid-template-columns: 1.6fr 0.9fr 0.9fr 1.2fr; }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__brand-link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.05em;
}

.footer__brand-mark {
  font-size: 26px;
  color: var(--orange);
}

.footer__brand-name {
  font-size: 15px;
  letter-spacing: 0.24em;
  color: var(--mist);
}

.footer__tagline {
  max-width: 24em;
  font-size: 13px;
  line-height: 1.8;
  color: var(--steel);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer__title {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.24em;
  color: var(--cyan);
  text-transform: uppercase;
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer__link {
  position: relative;
  display: inline-block;
  padding-bottom: 2px;
  font-size: 14px;
  color: var(--steel);
  transition: color 0.18s var(--ease);
}

.footer__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.footer__link:hover,
.footer__link:focus-visible { color: var(--mist); }

.footer__link:hover::after,
.footer__link:focus-visible::after { transform: scaleX(1); }

.footer__meta {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.02em;
  color: var(--steel);
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  max-width: var(--base-max);
  margin: clamp(30px, 4vw, 52px) auto 0;
  padding: 18px clamp(20px, 4vw, 56px) 26px;
  border-top: 1px solid var(--line-soft);
}

.footer__legal {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

/* ---------- 13. 通用内容容器与组件 ---------- */
.page-main {
  display: block;
  padding-top: clamp(24px, 3.4vw, 52px);
  scroll-margin-top: 76px;
}

.wrap {
  width: 100%;
  max-width: var(--base-max);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 56px);
}

.eyebrow {
  max-width: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--cyan);
  text-transform: uppercase;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 16px 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.breadcrumbs a {
  color: var(--steel);
  transition: color 0.18s var(--ease);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible { color: var(--cyan); }

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

.breadcrumbs__sep {
  color: var(--orange);
  opacity: 0.8;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease);
}

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

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--lime);
  color: var(--ink);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.figure {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(135deg, var(--ink-2) 0%, var(--glass) 58%, var(--ink-2) 100%);
}

.figure::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(43, 228, 208, 0.18), transparent 44%, rgba(255, 106, 42, 0.16));
}

.figure__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure--16x9 { aspect-ratio: 16 / 9; }
.figure--4x3 { aspect-ratio: 4 / 3; }
.figure--1x1 { aspect-ratio: 1 / 1; }
.figure--21x9 { aspect-ratio: 21 / 9; }

.figure__caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
}

/* ---------- 14. 动效偏好 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}