/* ============================================================
   幻影体育赛事 · 共享样式 /assets/site.css
   竖立式品牌轨道 + 12 栏非对称正文 + 粗野主义硬阴影
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { list-style: none; padding: 0; }
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; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 变量 ---------- */
:root {
  --night: #0C1F1A;
  --panel: #161F1C;
  --panel-deep: #08130F;
  --rock: #6E7A75;
  --cream: #ECF1ED;
  --moss: #4E7A5C;
  --moss-soft: #9FD0B4;
  --clay: #C0603C;
  --cyan: #35F0C8;
  --orange: #FF9A3C;
  --line: #3E4A45;

  --rail-w: 240px;
  --radius: 2px;
  --shadow-hard: 6px 6px 0 rgba(0, 0, 0, .48);
  --gap: clamp(14px, 1.8vw, 26px);
  --pad: clamp(18px, 3vw, 44px);

  --font-display: "Oswald", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Noto Serif SC", Georgia, "Songti SC", serif;
  --font-body: "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---------- 3. 基底与颗粒质感 ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail-w);
  background: var(--night);
  color: var(--cream);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .55;
  background-image:
    radial-gradient(rgba(236, 241, 237, .05) 1px, transparent 1px),
    radial-gradient(rgba(53, 240, 200, .028) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 2px 3px;
}

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

::selection { background: var(--cyan); color: var(--night); }

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

/* ---------- 4. 中文排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--cream);
}
h1 { font-size: clamp(30px, 4.2vw, 48px); line-height: 1.14; }
h2 { font-size: clamp(24px, 3vw, 32px); }
h3 { font-size: clamp(19px, 2.1vw, 22px); }
h4 { font-size: 17px; letter-spacing: 0; }

p { max-width: 74ch; }
strong, b { font-weight: 700; color: #FFFFFF; }

.serif-lead {
  font-family: var(--font-serif);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.72;
  color: var(--cream);
}

.mono, code, kbd {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.link-inline {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color .12s ease;
}
.link-inline:hover, .link-inline:focus-visible { color: var(--orange); }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 99;
  padding: 10px 18px;
  background: var(--cyan);
  color: var(--night);
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .04em;
  border: 2px solid var(--night);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .6);
  transform: translateY(-180%);
  transition: transform .12s ease;
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 6. 页头：竖立品牌轨道 ---------- */
.site-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 50;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 14px 16px;
  background: linear-gradient(180deg, #08130F 0%, #102B23 68%, #0C1F1A 100%);
  border-right: 2px solid var(--line);
  overflow-y: auto;
  overflow-x: hidden;
}

.site-rail::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--moss) 58%, var(--orange) 100%);
}

.rail-top {
  display: grid;
  gap: 12px;
  flex: 0 0 auto;
}

.rail-geo {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--rock);
  line-height: 1.5;
}

.rail-brand {
  display: grid;
  gap: 3px;
  padding: 12px 12px 16px;
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .46);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color .12s ease, background-color .12s ease;
}
.rail-brand:hover, .rail-brand:focus-visible { border-color: var(--cyan); }

.rail-mark {
  font-family: var(--font-display);
  font-size: 27px;
  line-height: 1;
  letter-spacing: .06em;
  color: var(--cyan);
}
.rail-word {
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--cream);
}
.rail-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--rock);
}

.rail-tagline {
  font-family: var(--font-serif);
  font-size: 13px;
  line-height: 1.6;
  color: var(--moss-soft);
  border-left: 3px solid var(--moss);
  padding-left: 10px;
}

/* 移动端按钮默认隐藏 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 12px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cream);
  transition: border-color .12s ease, color .12s ease;
}
.nav-toggle:hover, .nav-toggle:focus-visible { border-color: var(--orange); color: var(--orange); }
.nav-toggle[aria-expanded="true"] { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle-bar {
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}
.nav-toggle-text { font-family: var(--font-display); font-size: 14px; letter-spacing: .06em; }

/* 导航色块 */
.rail-nav {
  flex: 1 1 auto;
  min-height: 0;
}

.nav-list {
  display: grid;
  gap: 8px;
}

.nav-item { display: block; }

.nav-block {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: center;
  gap: 9px;
  padding: 11px 12px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--cream);
  font-family: var(--font-display);
  font-size: 15.5px;
  letter-spacing: .02em;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .42);
  transition: transform .12s ease, box-shadow .12s ease,
              border-color .12s ease, background-color .12s ease, color .12s ease;
}
.nav-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--rock);
  transition: color .12s ease;
}
.nav-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-block:hover,
.nav-block:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: 7px 7px 0 var(--cyan);
  color: var(--cyan);
}
.nav-block:hover .nav-num,
.nav-block:focus-visible .nav-num { color: var(--orange); }

.nav-block[aria-current="page"] {
  background: var(--moss);
  border-color: var(--moss);
  color: #F3FCF7;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .42);
  transform: none;
}
.nav-block[aria-current="page"] .nav-num { color: #CFF3DE; }

/* 轨道底部 */
.rail-foot {
  display: grid;
  gap: 10px;
  margin-top: auto;
  padding-top: 13px;
  border-top: 2px solid var(--line);
  flex: 0 0 auto;
}

.rail-round {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  color: var(--rock);
}
.rail-round-num {
  font-family: var(--font-mono);
  font-size: 36px;
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--cyan);
}
.rail-round-text { font-size: 12px; letter-spacing: .06em; }

.rail-cta {
  display: block;
  text-align: center;
  padding: 10px 12px;
  border: 2px solid #14100B;
  border-radius: var(--radius);
  background: var(--orange);
  color: #17100A;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .08em;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .5);
  transition: transform .12s ease, box-shadow .12s ease,
              background-color .12s ease, color .12s ease;
}
.rail-cta:hover, .rail-cta:focus-visible {
  transform: translate(-2px, -2px);
  background: var(--cyan);
  color: #06120E;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .5);
}

.rail-help {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--rock);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.rail-help a {
  border-bottom: 2px solid transparent;
  transition: color .12s ease, border-color .12s ease;
}
.rail-help a:hover, .rail-help a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 7. 页脚 ---------- */
.site-foot {
  margin-top: clamp(32px, 5vw, 76px);
  border-top: 2px solid var(--line);
  background: var(--panel);
  padding: clamp(26px, 4vw, 52px) var(--pad) 22px;
}

.foot-grid {
  display: grid;
  grid-template-columns: minmax(210px, 1.6fr) repeat(3, minmax(118px, 1fr));
  gap: clamp(18px, 2.4vw, 34px);
}

.foot-brand {
  display: grid;
  gap: 12px;
  align-content: start;
  justify-items: start;
}
.foot-name {
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: -.01em;
  color: var(--cream);
}
.foot-note {
  font-size: 14px;
  line-height: 1.72;
  color: var(--rock);
  max-width: 34ch;
}

.foot-col { display: block; }

.foot-col-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--cyan);
  padding-bottom: 8px;
  margin-bottom: 10px;
  border-bottom: 2px solid var(--line);
}

.foot-list { display: grid; gap: 7px; }
.foot-item { display: block; }

.foot-link {
  font-size: 14.5px;
  color: var(--cream);
  border-bottom: 2px solid transparent;
  padding-bottom: 1px;
  transition: color .12s ease, border-color .12s ease;
}
.foot-link:hover, .foot-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.foot-contact {
  display: grid;
  gap: 7px;
  margin-top: clamp(20px, 3vw, 36px);
  padding-top: 16px;
  border-top: 2px solid var(--line);
}
.foot-contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 9px;
  font-size: 14px;
  color: var(--rock);
  max-width: none;
}
.foot-contact-strong {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--moss-soft);
}

.foot-legal {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--rock);
  max-width: none;
}
.foot-copy {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--rock);
  max-width: none;
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--cream);
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .06em;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .5);
  transition: transform .12s ease, box-shadow .12s ease, background-color .12s ease,
              border-color .12s ease, color .12s ease;
}
.btn:hover, .btn:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 6px 6px 0 var(--cyan);
}

.btn--primary {
  background: var(--orange);
  border-color: #17100A;
  color: #17100A;
}
.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--cyan);
  border-color: #06120E;
  color: #06120E;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .55);
}

.btn--ghost {
  background: transparent;
  border-color: var(--moss);
  box-shadow: none;
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  background: var(--moss);
  border-color: var(--cyan);
  color: #F3FCF7;
  box-shadow: none;
  transform: none;
}

.btn--line { box-shadow: none; }
.btn--block { display: flex; width: 100%; }
.btn--sm { padding: 7px 13px; font-size: 13px; letter-spacing: .04em; }

/* ---------- 9. 面包屑 ---------- */
.crumb { padding-top: 16px; }
.crumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--rock);
}
.crumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.crumb-sep { color: var(--line); }
.crumb-link { transition: color .12s ease; }
.crumb-link:hover, .crumb-link:focus-visible { color: var(--cyan); }
.crumb-item[aria-current="page"] .crumb-link,
.crumb-current { color: var(--cream); }

/* ---------- 10. 容器与网格 ---------- */
.wrap {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(20px, 3vw, 46px) var(--pad);
}
.wrap--narrow { max-width: 880px; }

.section { padding: clamp(26px, 4vw, 62px) 0; }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: clamp(16px, 2vw, 28px);
  border-bottom: 2px solid var(--line);
}
.section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--rock);
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 30px);
  letter-spacing: -.01em;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--gap);
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--gap);
}

.stack { display: grid; gap: var(--gap); }
.stack--tight { gap: 10px; }

/* ---------- 11. 面板 / 标签 / 数据 ---------- */
.panel {
  position: relative;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  padding: clamp(15px, 2vw, 24px);
}
.panel--cut {
  box-shadow: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.panel--moss {
  background: linear-gradient(158deg, #1A2C24 0%, #101B17 100%);
}
.panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--line);
}
.panel-title {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: .01em;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--cream);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.6;
}
.tag--cyan { border-color: var(--cyan); color: var(--cyan); }
.tag--clay { border-color: var(--clay); color: var(--clay); }
.tag--moss { border-color: var(--moss); color: var(--moss-soft); background: rgba(78, 122, 92, .18); }
.tag--orange { border-color: var(--orange); color: var(--orange); }

.figure-num {
  font-family: var(--font-mono);
  font-size: clamp(42px, 7vw, 88px);
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}
.figure-num--warm { color: var(--orange); }
.figure-num--clay { color: var(--clay); }

.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  border: 2px solid var(--line);
  background: var(--panel);
}
.stat {
  padding: 12px 14px;
  border-right: 2px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat-label { display: block; font-size: 13px; color: var(--rock); }
.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(21px, 2.6vw, 32px);
  line-height: 1.2;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
  transition: transform .12s ease;
}
.stat-value[data-trend="up"] { color: var(--orange); }
.stat-value[data-trend="down"] { color: var(--clay); }
.stat-value[data-trend="flat"] { color: var(--rock); }
.stat:hover .stat-value { transform: scale(1.02); }

.score-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(10px, 2vw, 24px);
  padding: clamp(12px, 1.8vw, 20px);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}
.score-team {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.6vw, 19px);
  letter-spacing: .02em;
}
.score-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 5vw, 60px);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}
.score-sep { font-family: var(--font-mono); color: var(--rock); }

/* ---------- 12. 3×3 射门区域图母题 ---------- */
.pitch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  aspect-ratio: 1 / 1;
  border: 2px solid var(--line);
  background: #0E2A21;
  box-shadow: var(--shadow-hard);
}
.pitch-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(236, 241, 237, .14);
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(236, 241, 237, .78);
}
.pitch-cell[data-heat="hi"] { background: rgba(255, 154, 60, .74); color: #1A1004; }
.pitch-cell[data-heat="mid"] { background: rgba(192, 96, 60, .52); color: #FBEFE9; }
.pitch-cell[data-heat="low"] { background: rgba(78, 122, 92, .48); color: #E7F3EA; }
.pitch-cell[data-heat="none"] { background: rgba(110, 122, 117, .14); color: var(--rock); }

.pitch-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock);
}
.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border: 1px solid var(--line);
  vertical-align: middle;
}
.legend-dot[data-heat="hi"] { background: rgba(255, 154, 60, .9); }
.legend-dot[data-heat="mid"] { background: rgba(192, 96, 60, .8); }
.legend-dot[data-heat="low"] { background: rgba(78, 122, 92, .8); }
.legend-dot[data-heat="none"] { background: rgba(110, 122, 117, .35); }

/* ---------- 13. 技能树式路径 ---------- */
.path-list {
  display: grid;
  border: 2px solid var(--line);
  background: var(--panel);
}
.path-step {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  border-bottom: 2px solid var(--line);
  transition: background-color .12s ease;
}
.path-step:last-child { border-bottom: 0; }
.path-step:hover { background: rgba(78, 122, 92, .16); }
.path-index {
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1.2;
  color: var(--cyan);
}
.path-step[data-state="past"] .path-index { color: var(--rock); }
.path-step[data-state="now"] .path-index { color: var(--orange); }
.path-body h3, .path-body h4 { margin-bottom: 4px; }
.path-body p { font-size: 14.5px; color: var(--rock); }

/* ---------- 14. 折叠与标签页 ---------- */
.fold {
  margin-bottom: 10px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}
.fold > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: .02em;
  list-style: none;
}
.fold > summary::-webkit-details-marker { display: none; }
.fold > summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}
.fold[open] > summary {
  border-bottom: 2px solid var(--line);
  color: var(--cyan);
}
.fold[open] > summary::after { content: "–"; color: var(--orange); }
.fold-body {
  padding: 14px 16px;
  font-size: 15px;
  color: var(--rock);
}
.fold-body p { max-width: 68ch; }

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.tab {
  padding: 8px 14px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--rock);
  transition: border-color .12s ease, color .12s ease, background-color .12s ease;
}
.tab:hover, .tab:focus-visible { border-color: var(--orange); color: var(--orange); }
.tab[aria-selected="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(53, 240, 200, .08);
}
.tab-panel { padding-top: 4px; }
.tab-panel[hidden] { display: none; }

/* ---------- 15. 旁注 ---------- */
.rail-note {
  padding: 2px 0 2px 14px;
  border-left: 3px solid var(--moss);
  font-size: 14px;
  line-height: 1.72;
  color: var(--rock);
}
.rail-note + .rail-note { margin-top: 14px; }
.rail-note-title {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--cream);
}

.toc-list {
  display: grid;
  gap: 2px;
  border-left: 2px solid var(--line);
}
.toc-link {
  display: block;
  margin-left: -2px;
  padding: 6px 10px;
  border-left: 3px solid transparent;
  font-size: 14px;
  color: var(--rock);
  transition: color .12s ease, border-color .12s ease, background-color .12s ease;
}
.toc-link:hover, .toc-link:focus-visible { color: var(--cyan); }
.toc-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(53, 240, 200, .07);
}

.divider-slant {
  height: 20px;
  margin: clamp(18px, 3vw, 34px) 0;
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(78, 122, 92, .55), rgba(12, 31, 26, 0) 78%);
  clip-path: polygon(0 0, 100% 32%, 100% 68%, 0 100%);
}

/* ---------- 16. 图片容器基座 ---------- */
.img-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: #0A1512;
  box-shadow: var(--shadow-hard);
}
.img-frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame--wide { aspect-ratio: 21 / 9; }
.img-frame--tall { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }
.img-frame--cut {
  box-shadow: none;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}
.img-frame--empty {
  background-image:
    linear-gradient(136deg, rgba(78, 122, 92, .38), rgba(12, 31, 26, .92)),
    repeating-linear-gradient(45deg, rgba(236, 241, 237, .06) 0 2px, transparent 2px 9px);
}
.img-frame--empty::after {
  content: attr(data-label);
  position: absolute;
  right: 10px;
  bottom: 10px;
  left: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(236, 241, 237, .7);
}
.img-cap {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--rock);
}
.img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: var(--gap);
}

/* ---------- 17. 阅读进度条 ---------- */
.scroll-meter {
  position: fixed;
  top: 0;
  left: var(--rail-w);
  z-index: 70;
  width: 0;
  height: 3px;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--orange) 100%);
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1180px) {
  .wrap { padding-left: clamp(16px, 2.4vw, 30px); padding-right: clamp(16px, 2.4vw, 30px); }
}

@media (max-width: 1040px) {
  .foot-grid { grid-template-columns: minmax(200px, 1.4fr) repeat(2, minmax(120px, 1fr)); }
  .foot-brand { grid-column: span 3; }
}

@media (max-width: 960px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }
}

@media (max-width: 900px) {
  body { padding-left: 0; padding-top: 66px; }

  .site-rail {
    top: 0;
    right: 0;
    bottom: auto;
    left: 0;
    width: auto;
    height: auto;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-right: 0;
    border-bottom: 2px solid var(--line);
    overflow: visible;
  }
  .site-rail::before { height: 3px; }

  .rail-top {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1 1 auto;
    min-width: 0;
  }
  .rail-geo { display: none; }

  .rail-brand {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 6px 4px;
    border-color: transparent;
    background: transparent;
    box-shadow: none;
    clip-path: none;
  }
  .rail-brand:hover, .rail-brand:focus-visible { border-color: transparent; }
  .rail-mark { font-size: 19px; }
  .rail-word { font-size: 14px; }
  .rail-sub { display: none; }
  .rail-tagline { display: none; }

  .nav-toggle { display: inline-flex; flex: 0 0 auto; }

  .rail-nav {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    max-height: 72vh;
    overflow-y: auto;
    padding: 12px 14px 16px;
    background: var(--panel-deep);
    border-bottom: 2px solid var(--line);
    box-shadow: 0 12px 0 rgba(0, 0, 0, .35);
  }
  .rail-nav[data-open] { display: block; }

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

  .rail-foot { display: none; }

  .scroll-meter { left: 0; }
}

@media (max-width: 700px) {
  .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-brand { grid-column: span 2; }
  .score-strip { gap: 10px; }
}

@media (max-width: 640px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .grid-12 > * { grid-column: span 6; }
  .path-step { grid-template-columns: 44px minmax(0, 1fr); gap: 10px; padding: 12px; }
  .path-index { font-size: 19px; }
  .stat { border-right: 0; border-bottom: 2px solid var(--line); }
  .stat:last-child { border-bottom: 0; }
}

@media (max-width: 480px) {
  .nav-list { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; }
  .foot-brand { grid-column: span 1; }
  .btn { width: 100%; }
  .rail-brand .rail-word { font-size: 13px; }
}

/* ---------- 19. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0ms !important;
  }
  .nav-block:hover,
  .nav-block:focus-visible,
  .btn:hover,
  .btn:focus-visible,
  .rail-cta:hover,
  .rail-cta:focus-visible { transform: none; }
  .stat:hover .stat-value { transform: none; }
}