/* ============================================================
   BSPORTS 赛场 · 共享站点套件 /assets/site.css
   深空蓝夜幕 + 荧光青索引 + 橙红行动
   ============================================================ */

:root {
  --ink-900: #071623;
  --ink-800: #0E2438;
  --cyan: #35F0D0;
  --cyan-soft: #B8FFF2;
  --cyan-14: rgba(53, 240, 208, 0.14);
  --ember: #FF5A36;
  --stone: #6F7A78;
  --paper: #F2EEE4;
  --moss: #5C7A5E;
  --clay: #C4744F;
  --graphite: #1C232B;
  --mist: #8FA6A3;

  --line: rgba(143, 166, 163, 0.26);
  --line-strong: rgba(143, 166, 163, 0.42);

  --font-display: "Archivo Black", "Noto Sans SC", "PingFang SC", sans-serif;
  --font-body: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, monospace;

  --w-max: 1240px;
  --gutter: clamp(18px, 4vw, 56px);
  --header-h: 78px;
  --radius: 2px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

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

body {
  margin: 0;
  background:
    radial-gradient(120% 80% at 82% -12%, rgba(53, 240, 208, 0.10), transparent 62%),
    var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
figure { margin: 0; }
hr { border: 0; }

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

::selection {
  background: var(--cyan);
  color: #04201c;
}

/* ---------- 中文排版与通用容器 ---------- */
.shell {
  width: min(100% - var(--gutter) * 2, var(--w-max));
  margin-inline: auto;
}

.section { padding-block: clamp(56px, 8vw, 112px); }
.section--tight { padding-block: clamp(34px, 5vw, 68px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
  flex: 0 0 auto;
}

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.note-vertical {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--stone);
}

.lede {
  max-width: 44ch;
  font-size: clamp(15px, 1.4vw, 17px);
  color: rgba(242, 238, 228, 0.78);
}

.prose {
  max-width: 68ch;
  color: rgba(242, 238, 228, 0.80);
}
.prose p + p { margin-top: 1em; }

.divider {
  height: 1px;
  background: var(--line);
  margin: 0;
}

/* ---------- 布局网格 ---------- */
.grid {
  display: grid;
  gap: clamp(18px, 3vw, 36px);
}
.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.stack {
  display: grid;
  gap: 14px;
  align-content: start;
}
.stack--loose { gap: clamp(20px, 3vw, 34px); }

/* ---------- 面板与标签 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  background: rgba(14, 36, 56, 0.62);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 26px 60px -48px #000;
}
.panel--light {
  background: var(--paper);
  color: var(--graphite);
  border-color: rgba(28, 35, 43, 0.14);
}
.panel--light .lede,
.panel--light .prose { color: rgba(28, 35, 43, 0.78); }
.panel--light .eyebrow { color: #1f6d63; }
.panel--light .eyebrow::before { background: #1f6d63; }
.panel--light .note-vertical { color: rgba(28, 35, 43, 0.48); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
  border: 1px solid rgba(53, 240, 208, 0.36);
  border-radius: var(--radius);
}
.tag--moss { border-color: rgba(92, 122, 94, 0.7); color: #B7D3B6; }
.tag--clay { border-color: rgba(196, 116, 79, 0.7); color: #E8B79C; }
.tag--ember { border-color: rgba(255, 90, 54, 0.65); color: #FFB4A1; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: transform 0.22s var(--ease), background-color 0.25s ease,
    color 0.25s ease, border-color 0.25s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--ghost {
  color: var(--cyan-soft);
  background: rgba(53, 240, 208, 0.06);
  border-color: rgba(53, 240, 208, 0.42);
}
.btn--ghost:hover {
  background: rgba(53, 240, 208, 0.16);
  color: #ffffff;
}

.btn--ember {
  color: #14070a;
  background: var(--ember);
  font-weight: 700;
}
.btn--ember:hover { background: #FF7355; }

.btn--solid {
  color: #04201c;
  background: var(--cyan);
}
.btn--solid:hover { background: var(--cyan-soft); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  transition: gap 0.22s var(--ease), color 0.22s ease;
}
.link-arrow::after { content: "→"; }
.link-arrow:hover { gap: 13px; color: var(--cyan-soft); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}
.breadcrumb a { color: rgba(242, 238, 228, 0.72); transition: color 0.2s ease; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--stone); }

/* ---------- 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(90% 70% at 18% 8%, rgba(53, 240, 208, 0.20), transparent 62%),
    linear-gradient(160deg, #12283c 0%, #071623 58%, #10203a 100%);
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background:
    linear-gradient(90deg, rgba(242, 238, 228, 0.06) 1px, transparent 1px) 0 0 / 48px 100%,
    linear-gradient(rgba(242, 238, 228, 0.06) 1px, transparent 1px) 0 0 / 100% 48px;
}
.media-frame img,
.media-frame svg,
.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

.media-frame__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 2;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(242, 238, 228, 0.86);
  background: rgba(7, 22, 35, 0.66);
  border-left: 1px solid var(--cyan);
}

/* ---------- 筛选组件 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.filter-btn {
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: rgba(242, 238, 228, 0.80);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.filter-btn:hover { color: var(--cyan-soft); border-color: var(--cyan); }
.filter-btn[aria-pressed="true"] {
  color: #14070a;
  background: var(--ember);
  border-color: var(--ember);
}
.filter-status {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}
[data-filter-item][hidden] { display: none !important; }

/* ---------- 显现动画 ---------- */
.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s var(--ease);
}
.has-js [data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

/* ============================================================
   页头
   ============================================================ */
.skip-link {
  position: absolute;
  left: 12px;
  top: -100px;
  z-index: 200;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #04201c;
  background: var(--cyan);
  border-radius: var(--radius);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 10px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: linear-gradient(
    180deg,
    rgba(7, 22, 35, 0.96) 0%,
    rgba(7, 22, 35, 0.74) 64%,
    rgba(7, 22, 35, 0) 100%
  );
  transition: background-color 0.35s ease, box-shadow 0.35s ease;
}

.site-header[data-scrolled="true"] {
  background: rgba(14, 36, 56, 0.97);
  box-shadow:
    0 1px 0 rgba(53, 240, 208, 0.30),
    0 22px 50px -34px #000;
}

.header__inner {
  width: min(100% - var(--gutter) * 2, var(--w-max));
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 40px);
  min-height: var(--header-h);
  padding-block: 10px;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}
.brand__mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  background: rgba(53, 240, 208, 0.08);
  border: 1px solid rgba(53, 240, 208, 0.50);
  border-radius: var(--radius);
  transform: skewX(-8deg);
  transition: background-color 0.25s ease, color 0.25s ease;
}
.brand:hover .brand__mark {
  background: rgba(53, 240, 208, 0.20);
  color: var(--cyan-soft);
}
.brand__text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1;
}
.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.brand__season {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}
.brand__season::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 240, 208, 0.16);
}

/* 导航 */
.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 28px);
  margin-inline: auto;
}
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.8vw, 26px);
}
.nav__item { display: block; }
.nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 2px;
  font-size: 14px;
  color: rgba(242, 238, 228, 0.78);
  transition: color 0.25s ease;
}
.nav__index {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--stone);
  transition: color 0.25s ease;
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s var(--ease);
}
.nav__link:hover { color: var(--cyan-soft); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link:hover .nav__index { color: var(--cyan); }
.nav__link[aria-current="page"] { color: var(--cyan); }
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] .nav__index { color: var(--cyan); }

.nav__cta { display: none; }

/* 页头动作 */
.header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(53, 240, 208, 0.38);
  border-radius: var(--radius);
  background: rgba(53, 240, 208, 0.07);
  transition: background-color 0.25s ease, border-color 0.25s ease;
}
.nav-toggle:hover {
  background: rgba(53, 240, 208, 0.16);
  border-color: var(--cyan);
}
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--cyan);
  transition: transform 0.3s var(--ease), top 0.3s var(--ease),
    bottom 0.3s var(--ease);
}
.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { bottom: 0; }
.site-header[data-open="true"] .nav-toggle__bars::before {
  top: 5px;
  transform: rotate(45deg);
}
.site-header[data-open="true"] .nav-toggle__bars::after {
  bottom: 5.5px;
  transform: rotate(-45deg);
}

/* 阅读进度轨 */
.scroll-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  background: rgba(143, 166, 163, 0.18);
}
.scroll-rail__bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--ember));
  transition: width 0.12s linear;
}

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 120px);
  overflow: hidden;
  color: var(--paper);
  background: var(--ink-800);
  border-top: 1px solid rgba(53, 240, 208, 0.25);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 88% -14%, rgba(53, 240, 208, 0.16), transparent 62%),
    repeating-linear-gradient(
      180deg,
      rgba(143, 166, 163, 0.09) 0,
      rgba(143, 166, 163, 0.09) 1px,
      transparent 1px,
      transparent 44px
    );
}

.footer__inner {
  position: relative;
  z-index: 1;
  width: min(100% - var(--gutter) * 2, var(--w-max));
  margin-inline: auto;
  padding-block: clamp(40px, 6vw, 72px) 26px;
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) repeat(3, minmax(140px, 1fr));
  gap: clamp(24px, 4vw, 56px);
}

.footer__col { min-width: 0; }
.footer__col--brand { min-width: 0; }

.footer__brand {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 14px;
}
.brand__mark--footer {
  width: 32px;
  height: 32px;
  font-size: 11px;
}
.site-footer .brand__name { font-size: 17px; }

.footer__lede {
  max-width: 30ch;
  font-size: 14.5px;
  color: rgba(242, 238, 228, 0.74);
}

.footer__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.footer__list {
  display: grid;
  gap: 9px;
}
.footer__link {
  display: inline-block;
  font-size: 14px;
  color: rgba(242, 238, 228, 0.76);
  transition: color 0.2s ease, transform 0.2s var(--ease);
}
.footer__link:hover {
  color: var(--cyan-soft);
  transform: translateX(3px);
}

.footer__meta {
  display: grid;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: rgba(242, 238, 228, 0.68);
}
.footer__meta span { overflow-wrap: anywhere; }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  margin-top: clamp(30px, 5vw, 54px);
  padding-top: 18px;
  border-top: 1px solid rgba(143, 166, 163, 0.24);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.footer__note { color: rgba(143, 166, 163, 0.86); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1080px) {
  .nav__link { font-size: 13.5px; }
  .header__actions .btn { padding: 10px 13px; font-size: 11.5px; }
}

@media (max-width: 940px) {
  :root { --header-h: 72px; }

  .header__actions { display: none; }
  .nav-toggle { display: inline-flex; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    z-index: 118;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 16px var(--gutter) 26px;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    background: rgba(9, 26, 41, 0.985);
    border-top: 1px solid rgba(53, 240, 208, 0.24);
    border-bottom: 1px solid rgba(53, 240, 208, 0.18);
    box-shadow: 0 40px 70px -30px #000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease),
      visibility 0.28s linear;
  }
  .site-header[data-open="true"] .nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav__item { border-bottom: 1px solid rgba(143, 166, 163, 0.16); }
  .nav__link {
    justify-content: flex-start;
    padding: 15px 2px;
    font-size: 16px;
  }
  .nav__link::after { display: none; }
  .nav__index { font-size: 10.5px; }

  .nav__cta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-top: 20px;
  }
  .nav__cta .btn { padding: 13px 12px; }

  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .footer__col--brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid--7-5,
  .grid--8-4 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .note-vertical { writing-mode: horizontal-tb; }
}

@media (max-width: 600px) {
  :root { --header-h: 66px; }

  .brand__mark { width: 34px; height: 34px; font-size: 11px; }
  .brand__name { font-size: 16.5px; }
  .brand__season { font-size: 9px; letter-spacing: 0.1em; }

  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__bottom { font-size: 11px; }
  .footer__lede { max-width: none; }
}

/* ---------- 动效无障碍 ---------- */
@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;
    scroll-behavior: auto !important;
  }
  .has-js [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .btn:hover,
  .footer__link:hover { transform: none; }
}