/* =========================================================
   BOB看台 · 共享样式 /assets/site.css
   深靛蓝赛场后台 + 荧光青数据脉络 + 暖橙关键动作
   ========================================================= */

/* ---------- 0. 设计令牌 ---------- */
:root {
  --ink-900: #0B1026;
  --ink-800: #141B3C;
  --ink-700: #1E2A5E;
  --cyan: #38F0D8;
  --cyan-deep: #0E5B58;
  --amber: #FF8A3D;
  --amber-soft: #FFB37A;
  --star: #F2F5FF;
  --haze: #A7B0CE;
  --line: #2A3358;

  --shell: 1280px;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --r-lg: 28px;
  --r-md: 18px;
  --r-sm: 12px;
  --r-pill: 999px;

  --font-display: "Barlow Semi Condensed", "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", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --t: 220ms cubic-bezier(.4, 0, .2, 1);
}

/* ---------- 1. reset ---------- */
*, *::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 { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; border-radius: 4px; }
main:focus { outline: none; }

/* ---------- 2. 基础排版 ---------- */
body {
  min-height: 100vh;
  color: var(--star);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  letter-spacing: .005em;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(120% 70% at 6% -12%, rgba(56, 240, 216, .10), transparent 58%),
    radial-gradient(90% 60% at 98% 4%, rgba(255, 138, 61, .12), transparent 60%),
    radial-gradient(140% 90% at 50% 118%, rgba(30, 42, 94, .9), transparent 72%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--star);
}
.display-title { font-size: clamp(2.6rem, 6vw, 5.2rem); font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.page-title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.lede { max-width: 64ch; font-size: 1.0625rem; color: var(--haze); }
.data-num { font-family: var(--font-mono); font-weight: 600; letter-spacing: 0; color: var(--cyan); }
.rule { height: 1px; margin: 0; border: 0; background: var(--line); }

/* ---------- 3. 布局容器 ---------- */
.shell {
  width: min(100% - (var(--gutter) * 2), var(--shell));
  margin-inline: auto;
}
.section { padding-block: clamp(2.75rem, 7vw, 5.5rem); }
.section__head { display: grid; gap: .7rem; max-width: 68ch; }
.section__title { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 700; letter-spacing: -.015em; }

.grid { display: grid; gap: clamp(1.25rem, 3vw, 2.25rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4-8 { grid-template-columns: 4fr 8fr; }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--7-5 { grid-template-columns: 7fr 5fr; }

.u-contour { position: relative; }
.u-contour::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image: repeating-linear-gradient(115deg, rgba(42, 51, 88, .55) 0 1px, transparent 1px 15px);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 28%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 28%, transparent);
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 100;
  padding: .6rem 1.1rem;
  border-radius: 0 0 var(--r-md) var(--r-md);
  background: var(--cyan);
  color: #04231f;
  font-weight: 700;
  text-decoration: none;
  transition: top 160ms ease;
}
.skip-link:focus { top: 0; }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem 1.05rem;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-size: .875rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--t), color var(--t), border-color var(--t), transform var(--t), filter var(--t);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, #48F6DF, #1FC9B4);
  color: #04231f;
  box-shadow: 0 12px 28px -18px rgba(56, 240, 216, .95);
}
.btn--primary:hover { filter: brightness(1.06); }
.btn--amber {
  background: linear-gradient(135deg, var(--amber), #FF7A24);
  color: #1B1020;
  box-shadow: 0 12px 26px -14px rgba(255, 138, 61, .85);
}
.btn--amber:hover { filter: brightness(1.07); }
.btn--ghost {
  background: rgba(56, 240, 216, .08);
  border-color: rgba(56, 240, 216, .34);
  color: var(--cyan);
}
.btn--ghost:hover { background: rgba(56, 240, 216, .16); color: var(--star); }
.btn--quiet {
  padding-inline: .25rem;
  background: none;
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: rgba(56, 240, 216, .45);
  text-underline-offset: 4px;
}
.btn--quiet:hover { color: var(--star); text-decoration-color: var(--star); }
.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: center; }

/* ---------- 5. 标签 / 展签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .2rem .65rem;
  border-radius: var(--r-pill);
  background: rgba(56, 240, 216, .1);
  color: var(--cyan);
  font-size: .75rem;
  letter-spacing: .08em;
}
.tag--amber { background: rgba(255, 138, 61, .15); color: var(--amber-soft); }

.plate {
  position: relative;
  padding: .9rem 1.1rem 1rem 1.35rem;
  border-left: 1px solid var(--line);
}
.plate::before {
  content: "";
  position: absolute;
  left: -1px;
  top: .95rem;
  width: 2px;
  height: 1.7rem;
  border-radius: 2px;
  background: var(--cyan);
}
.plate__label {
  display: block;
  font-size: .8125rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--haze);
}
.plate__value {
  display: block;
  margin-top: .2rem;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  color: var(--star);
}
.plate-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

/* ---------- 6. 时间轴 ---------- */
.timeline { position: relative; display: grid; gap: 1.75rem; padding-left: 1.5rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: .5rem;
  bottom: .5rem;
  width: 1px;
  background: var(--line);
}
.timeline__item { position: relative; }
.timeline__marker {
  position: absolute;
  left: -1.5rem;
  top: .55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}

/* ---------- 7. 折叠面板 ---------- */
.fold { border-top: 1px solid var(--line); }
.fold:last-child { border-bottom: 1px solid var(--line); }
.fold__toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem .25rem;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--star);
  transition: color var(--t);
}
.fold__toggle:hover { color: var(--cyan); }
.fold__sign { position: relative; flex: none; width: 14px; height: 14px; }
.fold__sign::before,
.fold__sign::after { content: ""; position: absolute; background: var(--cyan); border-radius: 2px; }
.fold__sign::before { left: 0; top: 6px; width: 14px; height: 2px; }
.fold__sign::after { left: 6px; top: 0; width: 2px; height: 14px; transition: transform var(--t), opacity var(--t); }
.fold__toggle[aria-expanded="true"] .fold__sign::after { transform: scaleY(0); opacity: 0; }
.fold__panel { padding: .2rem .25rem 1.35rem; color: var(--haze); max-width: 68ch; }

/* ---------- 8. 筛选胶囊 ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem .95rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(20, 27, 60, .72);
  color: var(--haze);
  font-size: .8125rem;
  letter-spacing: .02em;
  cursor: pointer;
  transition: color var(--t), background var(--t), border-color var(--t), transform var(--t);
}
.chip:hover { color: var(--star); border-color: rgba(56, 240, 216, .42); transform: translateY(-2px); }
.chip[aria-pressed="true"] { background: var(--cyan-deep); border-color: var(--cyan); color: var(--star); }

/* ---------- 9. 面包屑 / 正文 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: var(--haze);
}
.breadcrumb a { color: var(--haze); text-decoration: none; transition: color var(--t); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--line); }
.breadcrumb [aria-current="page"] { color: var(--star); }

.prose { max-width: 68ch; color: var(--haze); }
.prose h2 { margin-top: 2.2em; font-size: clamp(1.35rem, 2.2vw, 1.75rem); color: var(--star); }
.prose h3 { margin-top: 1.8em; font-size: 1.125rem; color: var(--star); }
.prose p + p { margin-top: 1em; }
.prose ul { margin-top: 1em; }
.prose li { position: relative; margin-top: .5rem; padding-left: 1.15rem; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}
.prose a { color: var(--cyan); text-decoration-color: rgba(56, 240, 216, .45); text-underline-offset: 3px; }
.prose strong { color: var(--star); font-weight: 600; }

/* ---------- 10. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background-color: var(--ink-800);
  background-image:
    radial-gradient(120% 90% at 18% 8%, rgba(56, 240, 216, .18), transparent 60%),
    radial-gradient(100% 80% at 86% 84%, rgba(255, 138, 61, .18), transparent 62%),
    linear-gradient(160deg, var(--ink-700), var(--ink-900));
}
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(112deg, rgba(242, 245, 255, .05) 0 1px, transparent 1px 9px);
  mix-blend-mode: screen;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.media-frame__tag {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  z-index: 2;
  padding: .25rem .7rem;
  border-radius: var(--r-pill);
  background: rgba(11, 16, 38, .78);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--cyan);
}

/* ---------- 11. 头部：紧凑命令栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 16, 38, .97), rgba(11, 16, 38, .88));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}
.site-header__inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.75rem);
  min-height: 74px;
  padding-block: .55rem;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  min-width: 0;
  color: var(--star);
  text-decoration: none;
}
.brand-lockup__glyph {
  display: grid;
  place-items: center;
  flex: none;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(140deg, var(--cyan), var(--amber-soft));
  color: #04231f;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  box-shadow: 0 12px 26px -16px rgba(56, 240, 216, .9);
}
.brand-lockup__text { display: flex; flex-direction: column; min-width: 0; line-height: 1.15; }
.brand-lockup__name {
  font-family: var(--font-display);
  font-size: 1.1875rem;
  font-weight: 800;
  letter-spacing: -.01em;
  transition: color var(--t);
}
.brand-lockup:hover .brand-lockup__name { color: var(--cyan); }
.brand-lockup__tagline {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  color: var(--haze);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: .55rem;
  padding: .5rem .85rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(20, 27, 60, .92);
  color: var(--star);
  font-size: .8125rem;
  letter-spacing: .04em;
  cursor: pointer;
  transition: border-color var(--t), color var(--t);
}
.nav-toggle:hover { border-color: rgba(56, 240, 216, .45); color: var(--cyan); }
.nav-toggle__label { font-family: var(--font-mono); }
.nav-toggle__bars { display: inline-flex; flex-direction: column; gap: 4px; }
.nav-toggle__bars span {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform var(--t), opacity var(--t);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child { transform: translateY(-3px) rotate(-45deg); }

.command-bar { min-width: 0; }
.command-bar__list { display: flex; flex-wrap: wrap; align-items: center; gap: .1rem; }
.command-bar__item { min-width: 0; }
.command-bar__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .45rem .6rem;
  border-radius: var(--r-pill);
  color: var(--haze);
  font-size: .9375rem;
  text-decoration: none;
  transition: color var(--t), background var(--t), transform var(--t);
}
.command-bar__link:hover { color: var(--star); background: rgba(56, 240, 216, .07); transform: translateY(-2px); }
.command-bar__index {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: 0;
  color: var(--cyan);
  opacity: .55;
  transition: opacity var(--t);
}
.command-bar__link:hover .command-bar__index { opacity: 1; }
.command-bar__link[aria-current="page"] { color: var(--star); font-weight: 700; background: rgba(56, 240, 216, .06); }
.command-bar__link[aria-current="page"] .command-bar__index { opacity: 1; }
.command-bar__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: .6rem;
  right: .6rem;
  bottom: .04rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(56, 240, 216, 0));
}

.header-actions { display: flex; align-items: center; gap: .55rem; }
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .02em;
  color: var(--haze);
  white-space: nowrap;
}
.status-pill__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 240, 216, .16);
}

/* ---------- 12. 页脚 ---------- */
.site-footer {
  margin-top: clamp(3rem, 8vw, 7rem);
  background: linear-gradient(180deg, var(--ink-900), #070A19);
  border-top: 1px solid var(--line);
}
.site-footer__inner { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 4vw, 2rem); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr .8fr 1.2fr;
  gap: clamp(1.5rem, 4vw, 3.5rem);
}
.footer-brand__name {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -.02em;
}
.footer-brand__line { margin-top: .6rem; max-width: 34ch; color: var(--haze); font-size: .9375rem; }
.footer-brand__stats {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .02em;
  color: var(--haze);
}
.footer-brand__dot { margin-inline: .5rem; color: var(--line); }

.footer-col__title {
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer-links { display: grid; gap: .55rem; margin-top: .95rem; font-size: .9375rem; }
.footer-links a {
  display: inline-block;
  color: var(--haze);
  text-decoration: none;
  transition: color var(--t), transform var(--t);
}
.footer-links a:hover { color: var(--cyan); transform: translateX(3px); }
.footer-links--plain { gap: .75rem; font-size: .875rem; color: var(--haze); }
.footer-contact__item { display: grid; gap: .15rem; }
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--cyan);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  font-size: .8125rem;
  color: var(--haze);
}
.footer-legal__copy { font-family: var(--font-mono); letter-spacing: .02em; }
.footer-legal__icp { font-family: var(--font-mono); letter-spacing: .02em; color: var(--amber-soft); }

/* ---------- 13. 滚动工具 ---------- */
.progress-rail {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 80;
  width: 3px;
  height: 100vh;
  background: rgba(42, 51, 88, .45);
  pointer-events: none;
}
.progress-rail__bar {
  display: block;
  width: 100%;
  height: 0;
  background: linear-gradient(180deg, var(--cyan), var(--amber));
  transition: height 120ms linear;
}
.back-to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2.25rem);
  bottom: clamp(1rem, 3vw, 2.25rem);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(20, 27, 60, .94);
  color: var(--star);
  font-size: .8125rem;
  font-weight: 600;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity var(--t), transform var(--t), border-color var(--t), color var(--t);
}
.back-to-top[data-visible] { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { border-color: rgba(56, 240, 216, .45); color: var(--cyan); }

/* ---------- 14. 显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 240ms cubic-bezier(.4, 0, .2, 1), transform 240ms cubic-bezier(.4, 0, .2, 1);
}
[data-reveal][data-revealed] { opacity: 1; transform: none; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1120px) {
  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: .6rem;
  }
  .brand-lockup { order: 1; }
  .header-actions { order: 2; }
  .nav-toggle { display: inline-flex; order: 3; }
  .command-bar {
    order: 4;
    grid-column: 1 / -1;
    display: none;
    margin-top: .5rem;
    padding-top: .8rem;
    border-top: 1px solid var(--line);
  }
  .command-bar[data-open] { display: block; }
  .command-bar__list { flex-direction: column; align-items: stretch; gap: .1rem; }
  .command-bar__link {
    width: 100%;
    padding: .72rem .8rem;
    border-radius: var(--r-sm);
    font-size: 1rem;
  }
  .command-bar__link[aria-current="page"] { background: rgba(56, 240, 216, .1); }
  .command-bar__link[aria-current="page"]::after {
    left: .8rem;
    right: auto;
    width: 20px;
    bottom: .32rem;
  }
  .status-pill { display: none; }
}

@media (max-width: 900px) {
  .grid--2,
  .grid--3,
  .grid--4-8,
  .grid--5-7,
  .grid--7-5 { grid-template-columns: minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 720px) {
  .brand-lockup__tagline { display: none; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .header-actions .btn--ghost { display: none; }
  .btn { padding: .5rem .85rem; font-size: .8125rem; }
  .progress-rail { width: 2px; }
}

/* ---------- 16. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .btn:hover,
  .chip:hover,
  .footer-links a:hover,
  .command-bar__link:hover { transform: none; }
}