/* =========================================================
   /assets/site.css — 共享外壳样式
   墨绿夜场 × 玻璃堆叠 × 哨声黄聚焦
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dt, dd { 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; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-deep: #08201C;
  --ink-night: #0C1C33;
  --glass: #1B2F3A;
  --line: #2A4640;
  --line-soft: rgba(42, 70, 64, .58);
  --whistle: #FFD24A;
  --whistle-lift: #FFE59A;
  --whistle-soft: rgba(255, 210, 74, .12);
  --score-red: #FF4B3B;
  --turf: #1FA07A;
  --text: #EAF2EE;
  --text-dim: #9FB3AD;
  --paper: #F2F6F3;
  --paper-ink: #0B1F1A;
  --paper-dim: #4C605A;

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);

  --font-display: "Barlow Condensed", "Archivo", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "IBM Plex Mono", Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 中文排版基座 ---------- */
body {
  background-color: var(--ink-deep);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.8;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.005em;
  font-style: normal;
}

h1 { font-size: clamp(30px, 4.6vw, 54px); font-weight: 900; }
h2 { font-size: clamp(24px, 3vw, 38px); font-weight: 800; }
h3 { font-size: clamp(19px, 2vw, 25px); font-weight: 700; }
h4 { font-size: 17px; font-weight: 700; }

p { text-wrap: pretty; }

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

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

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

/* ---------- 4. 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.grid { display: grid; gap: clamp(20px, 3vw, 36px); }
.grid--split { grid-template-columns: minmax(0, 3fr) minmax(0, 9fr); }
.grid--halves { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--thirds { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.stack { display: grid; gap: clamp(22px, 3vw, 34px); }
.stack > *:nth-child(2n) { margin-left: 8px; }
.stack > *:nth-child(3n) { margin-left: 16px; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: center;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.btn--primary { background-color: var(--whistle); color: var(--paper-ink); }
.btn--primary:hover { background-color: var(--whistle-lift); }

.btn--ghost { border-color: var(--line); color: var(--text); }
.btn--ghost:hover { border-color: var(--whistle); color: var(--whistle); }

.btn--sm { min-height: 44px; padding: 0 14px; font-size: 13.5px; letter-spacing: .06em; }

/* ---------- 6. 头部 ---------- */
.skip-link {
  position: fixed;
  top: -72px;
  left: 12px;
  z-index: 200;
  background-color: var(--whistle);
  color: var(--paper-ink);
  font-weight: 700;
  font-size: 14px;
  padding: 12px 18px;
  border-radius: 2px;
  transition: top .16s var(--ease);
}
.skip-link:focus { top: 12px; }

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: var(--progress, 0%);
  background-color: var(--whistle);
  z-index: 120;
  transition: width .06s linear;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: var(--ink-night);
  background-image: linear-gradient(180deg, #0C1C33 0%, #08201C 100%);
  border-bottom: 1px solid var(--line);
}

/* 上层：品牌说明 + 联系入口 */
.header-top {
  background-color: rgba(12, 28, 51, .74);
  border-bottom: 1px solid var(--line-soft);
}

.header-top__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: 46px;
  flex-wrap: wrap;
  padding-block: 4px;
}

.brand-mark {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-mark__name {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--text);
}
.brand-mark__name::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-right: 9px;
  background-color: var(--whistle);
  flex: none;
}

.brand-mark__motto {
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.header-meta {
  display: flex;
  align-items: center;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--text-dim);
}
.header-meta__item + .header-meta__item {
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.header-top__actions { display: flex; align-items: center; gap: 10px; }

/* 下层：栏目条 */
.header-main__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 24px);
  min-height: 64px;
}

.header-main__cta { margin-left: auto; flex: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--text);
}
.nav-toggle:hover { border-color: var(--whistle); color: var(--whistle); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--whistle);
  transition: transform .2s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: var(--whistle);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle__text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
}

.site-header[data-open="true"] .nav-toggle__bars { transform: scaleX(.55); }

.site-nav { flex: 1; min-width: 0; }

.site-nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
  flex-wrap: wrap;
}

.site-nav__list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .03em;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.site-nav__list a:hover { color: var(--text); }
.site-nav__list a[aria-current="page"] {
  color: var(--whistle);
  border-bottom-color: var(--whistle);
}

/* ---------- 7. 哨声时间线 ---------- */
.whistle-rail {
  background-color: rgba(8, 32, 28, .55);
  border-top: 1px solid var(--line);
}

.whistle-rail__inner {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 22px);
  min-height: 46px;
}

.whistle-rail__title {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--text-dim);
  white-space: nowrap;
}

.whistle-rail__track {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  flex: 1;
  min-width: 0;
  background-image: repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 9px);
  background-size: 100% 5px;
  background-position: left bottom;
  background-repeat: no-repeat;
  opacity: .96;
}

.whistle-rail__node { min-width: 0; }

.whistle-rail__node a {
  position: relative;
  display: block;
  padding: 10px 8px 10px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--text-dim);
  border-top: 1px solid var(--line);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color .18s var(--ease);
}
.whistle-rail__node a::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 1px;
  height: 6px;
  background-color: var(--line);
  transition: height .18s var(--ease), background-color .18s var(--ease);
}
.whistle-rail__node a:hover { color: var(--text); }
.whistle-rail__node a[aria-current="page"] { color: var(--whistle); }
.whistle-rail__node a[aria-current="page"]::before {
  height: 12px;
  background-color: var(--whistle);
}

.whistle-rail__readout {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--text-dim);
  white-space: nowrap;
}
.whistle-rail__readout b { color: var(--whistle); font-weight: 500; }

/* 滚动收起的紧凑条 */
.site-header[data-compact="true"] .header-top,
.site-header[data-compact="true"] .whistle-rail { display: none; }
.site-header[data-compact="true"] .header-main__inner { min-height: 56px; }

/* ---------- 8. 页脚 ---------- */
.site-footer {
  background-color: var(--ink-night);
  background-image: linear-gradient(180deg, #0C1C33 0%, #08201C 100%);
  border-top: 1px solid var(--line);
  padding-block: clamp(42px, 6vw, 68px) 26px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: clamp(24px, 3vw, 46px);
}

.footer-brand__name {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--text);
}
.footer-brand__name::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-right: 9px;
  background-color: var(--whistle);
  flex: none;
}

.footer-brand__motto {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--whistle);
}

.footer-brand__desc {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: .16em;
  color: var(--text-dim);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 14px;
}

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

.footer-list a {
  font-size: 14.5px;
  color: var(--text-dim);
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-list a:hover { color: var(--whistle); border-bottom-color: var(--whistle); }

.footer-list--plain li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--text-dim);
  line-height: 1.7;
  word-break: break-word;
}
.footer-list--plain a { font-family: var(--font-body); font-size: 14.5px; }

.footer-legal {
  margin-top: clamp(30px, 4vw, 48px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
}

.footer-legal__note {
  flex: 1 1 340px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.footer-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
}
.footer-legal__links a {
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.footer-legal__links a:hover { color: var(--whistle); border-bottom-color: var(--whistle); }

.footer-legal__copy {
  flex: 1 1 100%;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-dim);
  text-align: right;
}

/* ---------- 9. 基础组件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--whistle);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background-color: var(--whistle);
  flex: none;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--text-dim);
}
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumb li { display: inline-flex; align-items: center; }
.breadcrumb li::after { content: "/"; margin-left: 8px; color: var(--line); }
.breadcrumb li:last-child::after { content: ""; margin-left: 0; }
.breadcrumb a { color: var(--text-dim); border-bottom: 1px solid transparent; transition: color .18s var(--ease), border-color .18s var(--ease); }
.breadcrumb a:hover { color: var(--whistle); border-bottom-color: var(--whistle); }
.breadcrumb [aria-current="page"] { color: var(--text); }

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.8;
}
.prose p + p { margin-top: 1.4em; }
.prose h2 { margin-top: 1.6em; margin-bottom: .5em; }
.prose h3 { margin-top: 1.4em; margin-bottom: .45em; }
.prose ul, .prose ol { margin-top: 1.2em; }
.prose li + li { margin-top: .55em; }
.prose ul li { padding-left: 1.2em; position: relative; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .82em;
  width: 8px;
  height: 1px;
  background-color: var(--whistle);
}
.prose a { color: var(--whistle); border-bottom: 1px solid rgba(255, 210, 74, .45); }
.prose a:hover { border-bottom-color: var(--whistle); }
.prose strong { color: var(--whistle); font-weight: 700; }

.on-paper {
  background-color: var(--paper);
  color: var(--paper-ink);
}
.on-paper h1, .on-paper h2, .on-paper h3, .on-paper h4 { color: var(--paper-ink); }
.on-paper .eyebrow { color: #2C6B58; }
.on-paper .eyebrow::before { background-color: #2C6B58; }
.on-paper .prose strong { color: #16624B; }
.on-paper .prose a { color: #16624B; border-bottom-color: rgba(22, 98, 75, .4); }

.panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: clamp(18px, 2.4vw, 30px);
  background-color: var(--glass);
}
.panel--glass {
  background-color: rgba(27, 47, 58, .72);
  border-color: var(--line);
}
.panel--solid {
  background-color: var(--ink-night);
  border-color: var(--line);
}
.panel--paper {
  background-color: var(--paper);
  border-color: #D9E4DE;
  color: var(--paper-ink);
}
.panel--paper .panel__title { color: var(--paper-ink); }
.panel--paper p { color: var(--paper-dim); }

.data-table {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  border-top: 1px solid var(--line);
}
.data-table caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--text-dim);
  padding-bottom: 10px;
}
.data-table th {
  text-align: left;
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--text-dim);
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.data-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--text);
}
.data-table .is-num { text-align: right; }
.data-table tbody tr:hover { background-color: var(--whistle-soft); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--text-dim);
  white-space: nowrap;
}
.tag--up { color: var(--turf); border-color: rgba(31, 160, 122, .55); }
.tag--down { color: var(--score-red); border-color: rgba(255, 75, 59, .55); }
.tag--key {
  color: var(--paper-ink);
  background-color: var(--whistle);
  border-color: var(--whistle);
}

/* 图片容器 —— 页面阶段直接放入 <img> 即可 */
.media-frame {
  position: relative;
  overflow: hidden;
  background-color: var(--glass);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }
.media-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  padding: 6px 12px;
  background-color: rgba(8, 32, 28, .82);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  border-top: 1px solid var(--line);
}
@supports not (aspect-ratio: 1) {
  .media-frame--16x9 { height: 0; padding-bottom: 56.25%; }
  .media-frame--4x3 { height: 0; padding-bottom: 75%; }
  .media-frame--wide { height: 0; padding-bottom: 42.85%; }
  .media-frame--3x4 { height: 0; padding-bottom: 133.33%; }
}

/* ---------- 10. 动效协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }

[data-section] .section__index,
[data-section] .mono.is-index {
  color: var(--text-dim);
  transition: color .2s var(--ease);
}
[data-section].is-current .section__index,
[data-section].is-current .mono.is-index { color: var(--whistle); }

@keyframes whistle-pulse {
  0%, 100% { background-color: var(--whistle); }
  50% { background-color: var(--whistle-lift); }
}
[data-pulse] { animation: whistle-pulse .6s ease 1; }

/* ---------- 11. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-brand__desc { max-width: 56ch; }
}

@media (max-width: 980px) {
  .grid--split { grid-template-columns: minmax(0, 1fr); }
  .grid--thirds { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .header-top__inner { min-height: 42px; }
  .brand-mark__motto { display: none; }
  .header-meta { font-size: 12px; }

  .nav-toggle { display: inline-flex; }

  .header-main__inner { min-height: 58px; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: calc(var(--gutter) * -1);
    right: calc(var(--gutter) * -1);
    display: none;
    background-color: var(--ink-night);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 32px rgba(0, 0, 0, .38);
    z-index: 95;
  }
  .site-header[data-open="true"] .site-nav { display: block; }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
    padding: 6px 0;
  }
  .site-nav__list a {
    min-height: 52px;
    padding: 0 var(--gutter);
    border-bottom: 0;
    border-left: 2px solid transparent;
    font-size: 16px;
  }
  .site-nav__list a[aria-current="page"] {
    border-left-color: var(--whistle);
    border-bottom-color: transparent;
    background-color: var(--whistle-soft);
  }

  .whistle-rail__track { display: none; }
  .whistle-rail__readout { margin-left: auto; }
  .whistle-rail__inner { min-height: 40px; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .grid--halves,
  .grid--thirds { grid-template-columns: minmax(0, 1fr); }
  .stack > *:nth-child(2n),
  .stack > *:nth-child(3n) { margin-left: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-legal__copy { text-align: left; }
}

@media (max-width: 560px) {
  .header-top__actions .btn { padding: 0 12px; font-size: 12.5px; }
  .header-main__cta { padding: 0 12px; font-size: 12.5px; }
  .footer-grid { grid-template-columns: 1fr; }
  .header-meta__item + .header-meta__item { margin-left: 0; padding-left: 0; border-left: 0; }
}

/* ---------- 12. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}