/* ============================================================
   亚博看台 · 共享样式  /assets/site.css
   色板：pitch-ink / night-blue / deep-moss / stand-gray
        chalk-white / signal-lime / amber-orange / rose-pink / score-gray
   ============================================================ */

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; padding: 0; }

ul, ol { 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;
  padding: 0;
  cursor: pointer;
}

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

main { display: block; }

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

/* ---------- 2. 令牌与基础排版 ---------- */
:root {
  --pitch-ink: #07110F;
  --night-blue: #0B1B2B;
  --deep-moss: #12332B;
  --stand-gray: #1B2B2B;
  --chalk: #F0F7F3;
  --lime: #C8FF3D;
  --amber: #FF9B3D;
  --rose: #FF5C8A;
  --score-gray: #9FB3AB;

  --muted: rgba(240, 247, 243, .66);
  --line: rgba(240, 247, 243, .14);
  --line-strong: rgba(240, 247, 243, .3);

  --rail-w: 264px;
  --step: clamp(30px, 5.2vw, 80px);

  --font-head: "Helvetica Neue", "Arial Narrow", Arial, system-ui, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --ease: cubic-bezier(.22, .72, .2, 1);
}

@media (max-width: 1024px) {
  :root { --rail-w: 0px; }
}

body {
  min-height: 100vh;
  padding-left: var(--rail-w);
  background-color: var(--pitch-ink);
  background-image:
    radial-gradient(900px 520px at 92% -8%, rgba(18, 51, 43, .9), rgba(18, 51, 43, 0) 64%),
    radial-gradient(680px 480px at -8% 104%, rgba(11, 27, 43, .95), rgba(11, 27, 43, 0) 62%),
    repeating-linear-gradient(115deg, rgba(240, 247, 243, .018) 0 1px, transparent 1px 46px);
  background-attachment: fixed;
  color: var(--chalk);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (max-width: 1024px) {
  body { background-attachment: scroll; }
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: .98;
  letter-spacing: -.01em;
}

h1 { font-size: clamp(38px, 7.2vw, 96px); }
h2 { font-size: clamp(26px, 4vw, 48px); }
h3 { font-size: clamp(19px, 2.4vw, 28px); line-height: 1.1; }
h4 { font-size: 17px; line-height: 1.3; }

p { text-wrap: pretty; }

.num,
.mono,
[data-num] {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  line-height: 1.35;
}

/* ---------- 3. 页头：侧边轨道 + 顶部条 ---------- */
.site-header {
  position: relative;
  z-index: 80;
}

.skip-link {
  position: absolute;
  left: 14px;
  top: -70px;
  z-index: 120;
  padding: 10px 16px;
  background: var(--lime);
  color: #08130F;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  border-radius: 2px;
  transition: top .2s var(--ease);
}

.skip-link:focus { top: 14px; }

/* 顶部条：桌面隐藏，移动端吸顶 */
.topbar { display: none; }

/* 品牌 */
.brand { display: block; }

.brand__mark {
  display: block;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 26px;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--chalk);
  transition: color .2s var(--ease);
}

.brand__tag {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--lime);
  white-space: nowrap;
}

.brand:hover .brand__mark { color: var(--lime); }

/* 目录按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: rgba(11, 27, 43, .9);
  color: var(--chalk);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

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

.nav-toggle[aria-expanded="true"] {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(18, 51, 43, .92);
}

.nav-toggle__icon {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 18px;
  height: 12px;
}

.nav-toggle__icon i {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__icon i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* 侧边轨道 */
.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 60;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 30px 22px 26px;
  background: linear-gradient(175deg, var(--night-blue) 0%, var(--pitch-ink) 58%, #050D0C 100%);
  border-right: 1px solid var(--line);
  overflow: hidden;
}

.rail::before {
  content: "";
  position: absolute;
  left: -30%;
  top: -70px;
  width: 190%;
  height: 230px;
  background: linear-gradient(90deg, var(--deep-moss), rgba(18, 51, 43, .12));
  transform: rotate(-12deg);
  opacity: .9;
  pointer-events: none;
}

.rail::after {
  content: "";
  position: absolute;
  right: -58px;
  bottom: -64px;
  width: 168px;
  height: 168px;
  background: var(--amber);
  opacity: .16;
  transform: rotate(18deg);
  pointer-events: none;
}

.rail > * { position: relative; z-index: 1; }

.rail__brand {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.rail__close { display: none; }

.rail__closeIcon {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
}

.rail__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--score-gray);
}

.rail__metaNum { color: var(--lime); margin-right: 6px; }

.rail__nav {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.rail__nav::-webkit-scrollbar { width: 6px; height: 6px; }
.rail__nav::-webkit-scrollbar-thumb { background: var(--line-strong); }

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 12px;
  border: 1px solid transparent;
  border-radius: 2px;
  color: var(--chalk);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}

.nav-link__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--score-gray);
  transition: color .2s var(--ease);
}

.nav-link__label {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .02em;
}

.nav-link:hover {
  background: rgba(18, 51, 43, .78);
  border-color: rgba(200, 255, 61, .35);
  transform: translateX(3px);
}

.nav-link:hover .nav-link__num { color: var(--lime); }

.nav-link[aria-current="page"] {
  background: rgba(18, 51, 43, .95);
  border-color: rgba(200, 255, 61, .5);
}

.nav-link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  bottom: -1px;
  width: 3px;
  background: var(--lime);
}

.nav-link[aria-current="page"] .nav-link__label,
.nav-link[aria-current="page"] .nav-link__num { color: var(--lime); }

.nav-hint { display: none; }

.rail__foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.rail__cta { width: 100%; }

.rail__note {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--score-gray);
}

.nav-scrim { display: none; }

/* ---------- 4. 平板 / 移动端：抽屉 ---------- */
@media (max-width: 1024px) {
  .topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    position: sticky;
    top: 0;
    z-index: 65;
    padding: 12px clamp(16px, 4vw, 26px);
    background: rgba(7, 17, 15, .94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
  }

  .brand--compact .brand__mark { font-size: 18px; }

  .brand--compact .brand__tag {
    margin-top: 5px;
    font-size: 9px;
    letter-spacing: .16em;
  }

  .rail {
    width: min(90vw, 384px);
    transform: translateX(-104%);
    transition: transform .4s var(--ease);
    box-shadow: 26px 0 70px rgba(0, 0, 0, .55);
    padding: 24px 20px 26px;
    overflow-y: auto;
    z-index: 75;
  }

  .site-header[data-open="true"] .rail { transform: translateX(0); }
  .site-header[data-open="false"] .rail { transform: translateX(-104%); }

  body.nav-open { overflow: hidden; }

  .nav-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 60;
    background: rgba(4, 10, 9, .74);
    opacity: 0;
    visibility: hidden;
    transition: opacity .32s var(--ease), visibility .32s var(--ease);
  }

  .site-header[data-open="true"] .nav-scrim { opacity: 1; visibility: visible; }

  .rail__close {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 10px;
    border: 1px solid var(--line-strong);
    border-radius: 2px;
    color: var(--score-gray);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: .12em;
    white-space: nowrap;
  }

  .rail__close:hover { border-color: var(--rose); color: var(--rose); }

  .rail__nav { flex: 0 0 auto; overflow: visible; }

  .nav-list {
    flex-direction: row;
    gap: 10px;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 4px 2px 14px;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .nav-list__item { flex: 0 0 auto; scroll-snap-align: start; }

  .nav-link {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    min-width: 150px;
    padding: 14px 16px;
    border-color: var(--line);
    background: rgba(11, 27, 43, .74);
  }

  .nav-link:hover { transform: none; }

  .nav-link[aria-current="page"]::before {
    top: -1px;
    bottom: auto;
    left: -1px;
    width: 100%;
    height: 3px;
  }

  .nav-hint {
    display: block;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: .16em;
    color: var(--score-gray);
  }

  .nav-hint::before { content: "← "; color: var(--lime); }
}

@media (max-width: 420px) {
  .nav-toggle__label { display: none; }
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: var(--step);
  background: linear-gradient(180deg, var(--pitch-ink) 0%, var(--night-blue) 78%, #08131F 100%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: -6%;
  top: -60px;
  width: 46%;
  height: 190px;
  background: var(--deep-moss);
  opacity: .5;
  transform: rotate(-7deg);
  pointer-events: none;
}

.footer__inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(34px, 5vw, 66px) 26px;
}

.footer__head { position: relative; }

.footer__eyebrow {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .24em;
  color: var(--lime);
}

.footer__brandline {
  margin-top: 14px;
  max-width: 18ch;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4.4vw, 54px);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--chalk);
}

.footer__watermark {
  position: absolute;
  right: 0;
  top: -12px;
  font-family: var(--font-mono);
  font-size: clamp(76px, 14vw, 168px);
  line-height: .8;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200, 255, 61, .3);
  pointer-events: none;
  user-select: none;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  gap: clamp(24px, 4vw, 58px);
  margin-top: clamp(30px, 4.4vw, 56px);
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.footer__col { min-width: 0; }

.footer__colTitle {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  color: var(--lime);
}

.footer__navlist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 20px;
}

.footer__navlink {
  display: inline-block;
  padding: 3px 0;
  color: var(--muted);
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.footer__navlink:hover { color: var(--lime); border-bottom-color: rgba(200, 255, 61, .55); }

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

.footer__metaList {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14.5px;
  color: var(--muted);
}

.footer__metaList li + li { margin-top: 9px; }

.footer__text { color: var(--muted); }

.footer__note {
  margin-top: 16px;
  max-width: 46ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--score-gray);
}

.footer__note--lime {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lime);
}

.footer__cta { margin-top: 18px; }

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 26px;
  margin-top: clamp(30px, 4vw, 54px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--score-gray);
}

.footer__legal,
.footer__copy { color: var(--score-gray); }

@media (max-width: 900px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__watermark { top: auto; bottom: 0; opacity: .7; }
}

@media (max-width: 620px) {
  .footer__grid { grid-template-columns: 1fr; }
  .footer__navlist { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* ---------- 6. 通用组件 ---------- */
.shell {
  width: 100%;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: clamp(18px, 4.2vw, 46px);
}

.shell--wide { max-width: 1400px; }

.prose { max-width: 70ch; }
.prose p + p { margin-top: 1em; }

.section { padding-block: var(--step); }

.section__head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 40px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .24em;
  color: var(--lime);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--lime);
}

.section-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 7vw, 92px);
  line-height: .88;
  letter-spacing: -.03em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(200, 255, 61, .55);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: rgba(27, 43, 43, .55);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--score-gray);
}

.tag--lime { border-color: rgba(200, 255, 61, .55); color: var(--lime); }
.tag--amber { border-color: rgba(255, 155, 61, .55); color: var(--amber); }
.tag--rose { border-color: rgba(255, 92, 138, .55); color: var(--rose); }
.tag--mono { font-variant-numeric: tabular-nums; }

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 30px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

@media (max-width: 880px) {
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }
}

.card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  border: 1px solid var(--line);
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(11, 27, 43, .92), rgba(7, 17, 15, .92));
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 40px;
  height: 3px;
  background: var(--lime);
}

.card:hover { transform: translateY(-4px); border-color: rgba(200, 255, 61, .35); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  transition: transform .18s var(--ease), background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.btn--lime {
  background: var(--lime);
  color: #08130F;
  box-shadow: 4px 4px 0 rgba(200, 255, 61, .18);
}

.btn--lime:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(200, 255, 61, .26);
}

.btn--ghost {
  background: transparent;
  color: var(--chalk);
  border-color: var(--line-strong);
}

.btn--ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.btn--block { width: 100%; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--score-gray);
}

.breadcrumb__link { color: var(--score-gray); transition: color .18s var(--ease); }
.breadcrumb__link:hover { color: var(--lime); }
.breadcrumb__sep { color: rgba(159, 179, 171, .5); }
.breadcrumb__item[aria-current="page"] { color: var(--chalk); }

/* 图片容器：页面阶段放入 .media > img 即可 */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
  background:
    radial-gradient(120% 90% at 12% 8%, rgba(18, 51, 43, .85), rgba(7, 17, 15, .95)),
    var(--stand-gray);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    linear-gradient(rgba(200, 255, 61, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 255, 61, .06) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05);
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 6px 12px;
  border-top: 1px solid rgba(200, 255, 61, .45);
  border-right: 1px solid rgba(200, 255, 61, .45);
  background: rgba(7, 17, 15, .84);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--chalk);
}

/* ---------- 7. 动效 ---------- */
[data-reveal] { opacity: 1; transform: none; }

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .62s var(--ease), transform .62s var(--ease);
  will-change: opacity, transform;
}

.has-js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

.scroll-progress {
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  z-index: 90;
  background: linear-gradient(90deg, var(--lime), var(--amber) 55%, var(--rose));
  transform: scaleX(var(--sp, 0));
  transform-origin: 0 50%;
  pointer-events: none;
}

@media (min-width: 1025px) {
  .scroll-progress { left: var(--rail-w); }
}

/* ---------- 8. 可访问性 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .has-js [data-reveal] { opacity: 1; transform: none; }
  .rail { transition: none; }
  .nav-scrim { transition: none; }
}