/* ============ 1. 基础重置 ============ */
*,
*::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, fieldset {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

img, svg, video { display: block; max-width: 100%; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a { color: inherit; text-decoration: none; }

table { border-collapse: collapse; }

[hidden] { display: none !important; }

/* ============ 2. 设计令牌 ============ */
:root {
  --ink: #14181B;
  --green: #1F6F4A;
  --green-deep: #0E3B2A;
  --lime: #C6FF3D;
  --paper: #F4F7F5;
  --blue: #4DA3FF;
  --panel: #2A3136;
  --muted: #9AA6A0;
  --alert: #FF5A5F;
  --gold: #FFC857;

  --line: rgba(244, 247, 245, .14);
  --line-soft: rgba(244, 247, 245, .07);
  --line-lime: rgba(198, 255, 61, .32);

  --shell: 1320px;
  --gutter: clamp(16px, 4vw, 40px);
  --ease: cubic-bezier(.22, .61, .36, 1);

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-heading: "Inter Tight", "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Noto Sans SC", monospace;
}

/* ============ 3. 中文排版与页面底色 ============ */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(244, 247, 245, .032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 247, 245, .032) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .012em;
  word-break: break-word;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: .03em;
  text-wrap: pretty;
}

h1 { font-size: clamp(32px, 5vw, 60px); }
h2 { font-size: clamp(26px, 3.4vw, 42px); }
h3 { font-size: clamp(19px, 2vw, 24px); }
h4 { font-size: 17px; }

p { text-wrap: pretty; }

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

/* ============ 4. 布局工具 ============ */
.container,
.header-shell,
.footer-shell {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.page-main {
  display: block;
  min-height: 60vh;
}

.section {
  padding-block: clamp(40px, 6vw, 84px);
}

.section + .section { border-top: 1px solid var(--line-soft); }

.section-head {
  display: grid;
  gap: 12px;
  max-width: 64ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--lime);
}

.section-kicker::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--lime);
  flex: none;
}

.section-title { font-size: clamp(26px, 3.4vw, 40px); }

.section-lead {
  color: var(--muted);
  font-size: 16.5px;
}

.lead { font-size: 18px; color: var(--paper); }

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

.divider {
  height: 1px;
  border: 0;
  background: var(--line);
  margin-block: clamp(20px, 3vw, 32px);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-rail { grid-template-columns: minmax(240px, 320px) minmax(0, 1fr); }

.rail-panel {
  position: sticky;
  top: 24px;
  align-self: start;
}

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

.list-dot li {
  position: relative;
  padding-left: 20px;
  color: var(--muted);
  font-size: 15.5px;
}

.list-dot li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 8px;
  height: 1px;
  background: var(--lime);
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 14.5px;
  letter-spacing: .04em;
  color: var(--lime);
  transition: color .16s var(--ease);
}

.link-more::after {
  content: "→";
  transition: transform .16s var(--ease);
}

.link-more:hover { color: var(--paper); }
.link-more:hover::after { transform: translateX(3px); }

/* ============ 5. 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14.5px;
  letter-spacing: .05em;
  border: 1px solid transparent;
  text-align: center;
  transition: background-color .16s var(--ease), color .16s var(--ease),
              border-color .16s var(--ease), transform .16s var(--ease);
}

.btn-primary { background: var(--green); color: var(--paper); }
.btn-primary:hover { background: #268a5a; }

.btn-lime { background: var(--lime); color: var(--ink); }
.btn-lime:hover { background: #d8ff78; }

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

.btn-blue { background: var(--blue); color: #08131F; }
.btn-blue:hover { background: #6fb6ff; }

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-block { width: 100%; }

/* ============ 6. 页头 ============ */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -80px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .04em;
  transition: top .16s var(--ease);
}

.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  border-bottom: 1px solid var(--line-lime);
}

/* 上层：品牌说明 */
.header-upper {
  background: var(--green-deep);
  border-bottom: 1px solid var(--line-soft);
}

.header-upper .header-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  min-height: 40px;
  padding-block: 4px;
}

.brand-line {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--paper);
}

.brand-mark {
  display: inline-block;
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(198, 255, 61, .18);
}

.utility-text {
  margin-left: auto;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

.season-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--lime);
  border: 1px solid var(--line-lime);
}

.season-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--lime);
  animation: season-pulse 2s ease-in-out infinite;
}

@keyframes season-pulse {
  50% { opacity: .3; }
}

.header-cta { flex: none; }

/* 主层：品牌 + 导航 */
.header-main {
  position: relative;
  background: linear-gradient(180deg, #14181B 0%, #101417 100%);
  border-bottom: 1px solid var(--line-soft);
}

.header-main-inner {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  min-height: 72px;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
}

.brand-tile {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  background: var(--green);
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 25px;
  line-height: 1;
  box-shadow: inset 0 0 0 1px var(--line-lime);
}

.brand-text { display: flex; flex-direction: column; line-height: 1.2; }

.brand-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .07em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: var(--muted);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 14px;
  border: 1px solid var(--line-lime);
  color: var(--paper);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: .06em;
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--lime);
  transition: background-color .18s var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--lime);
  transition: transform .18s var(--ease);
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

.site-nav { margin-left: auto; }

.nav-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 16px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: .05em;
  color: var(--muted);
  border: 1px solid transparent;
  box-shadow: inset 0 -2px 0 transparent;
  transition: color .16s var(--ease), background-color .16s var(--ease),
              border-color .16s var(--ease), box-shadow .16s var(--ease);
}

.nav-link:hover {
  color: var(--paper);
  background: rgba(31, 111, 74, .35);
}

.nav-link[aria-current="page"] {
  color: var(--lime);
  background: rgba(198, 255, 61, .09);
  box-shadow: inset 0 -2px 0 var(--lime);
  border-color: transparent;
}

/* ============ 7. 追比分横条 ============ */
.score-rail {
  background: var(--green);
  border-top: 1px solid var(--line-lime);
  border-bottom: 1px solid rgba(20, 24, 27, .75);
}

.score-rail-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 66px;
  padding-block: 10px;
}

.score-live {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: none;
  padding: 6px 12px;
  background: rgba(14, 59, 42, .7);
  border: 1px solid var(--line-lime);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--lime);
}

.score-live-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--alert);
  animation: season-pulse 1.6s ease-in-out infinite;
}

.score-list {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(244, 247, 245, .35) transparent;
}

.score-list::-webkit-scrollbar { height: 4px; }
.score-list::-webkit-scrollbar-thumb { background: rgba(244, 247, 245, .35); }

.score-item {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: none;
  padding: 2px 20px;
  border-left: 1px solid rgba(244, 247, 245, .22);
}

.score-item:first-child { border-left: 0; padding-left: 0; }

.score-teams {
  font-size: 14px;
  font-weight: 600;
  color: var(--paper);
  white-space: nowrap;
}

.score-vs {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: rgba(244, 247, 245, .55);
}

.score-num {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 30px;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.score-sep {
  font-size: 20px;
  color: rgba(244, 247, 245, .6);
}

.score-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: rgba(244, 247, 245, .75);
  white-space: nowrap;
}

.score-actions {
  display: flex;
  gap: 6px;
  flex: none;
}

.score-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  border: 1px solid rgba(244, 247, 245, .38);
  transition: background-color .16s var(--ease), color .16s var(--ease),
              border-color .16s var(--ease);
}

.score-btn:hover {
  background: var(--lime);
  color: var(--ink);
  border-color: var(--lime);
}

.score-num.is-flash { animation: score-rise 120ms var(--ease); }

@keyframes score-rise {
  from { transform: translateY(8px); opacity: .3; }
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 3;
  width: 0;
  height: 2px;
  background: var(--lime);
}

/* ============ 8. 页脚 ============ */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--ink);
  border-top: 1px solid var(--line-lime);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 140px;
  background: linear-gradient(180deg, rgba(31, 111, 74, .3), transparent);
  pointer-events: none;
}

.footer-shell {
  position: relative;
  padding-block: clamp(36px, 5vw, 60px) 26px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(240px, 1.5fr) repeat(2, minmax(140px, 1fr)) minmax(230px, 1.3fr);
  gap: clamp(22px, 3vw, 40px);
}

.footer-brand {
  display: grid;
  gap: 10px;
  align-content: start;
  justify-items: start;
}

.footer-brand-mark {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--green);
  color: var(--paper);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1;
  box-shadow: inset 0 0 0 1px var(--line-lime);
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .07em;
}

.footer-brand-summary {
  max-width: 34ch;
  font-size: 14px;
  color: var(--muted);
}

.footer-col { align-content: start; }

.footer-col-title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--lime);
}

.footer-nav,
.footer-links {
  display: grid;
  gap: 9px;
}

.footer-nav a,
.footer-links a {
  font-size: 14.5px;
  color: var(--paper);
  opacity: .8;
  transition: opacity .16s var(--ease), color .16s var(--ease);
}

.footer-nav a:hover,
.footer-links a:hover { opacity: 1; color: var(--lime); }

.footer-contact { display: grid; gap: 10px; }

.contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  min-width: 0;
  font-size: 14px;
}

.contact-label {
  flex: none;
  min-width: 40px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
}

.contact-value {
  min-width: 0;
  color: var(--paper);
  word-break: break-all;
}

.copy-btn {
  flex: none;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--lime);
  border: 1px solid var(--line-lime);
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.copy-btn:hover { background: var(--lime); color: var(--ink); }
.copy-btn.is-copied { background: var(--lime); color: var(--ink); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13.5px;
}

.footer-legal-links a { color: var(--muted); }
.footer-legal-links a:hover { color: var(--lime); }

.footer-meta {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  background: var(--lime);
  color: var(--ink);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13.5px;
  letter-spacing: .06em;
  border: 1px solid var(--ink);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .5);
  transition: background-color .16s var(--ease), transform .16s var(--ease);
}

.to-top:hover {
  background: var(--paper);
  transform: translateY(-2px);
}

/* ============ 9. 内容容器与组件 ============ */
.panel {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--panel);
  border: 1px solid var(--line);
}

.panel-alt {
  background: var(--green-deep);
  border-color: rgba(198, 255, 61, .2);
}

.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.panel-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .04em;
}

.panel-body {
  color: var(--muted);
  font-size: 15.5px;
}

.card {
  padding: 20px;
  background: rgba(42, 49, 54, .5);
  border: 1px solid var(--line);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.card:hover {
  background: rgba(42, 49, 54, .82);
  border-color: var(--line-lime);
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 44px);
}

.stat { display: grid; gap: 4px; }

.stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 4.6vw, 72px);
  line-height: 1;
  letter-spacing: .01em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.stat-xl .stat-value { font-size: clamp(56px, 9vw, 128px); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--lime);
  border: 1px solid var(--line-lime);
}

.tag-blue { color: var(--blue); border-color: rgba(77, 163, 255, .45); }
.tag-gold { color: var(--gold); border-color: rgba(255, 200, 87, .45); }
.tag-alert { color: var(--alert); border-color: rgba(255, 90, 95, .45); }

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 7px 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--muted);
  background: rgba(42, 49, 54, .55);
  border: 1px solid var(--line);
  transition: color .16s var(--ease), background-color .16s var(--ease),
              border-color .16s var(--ease);
}

.chip:hover { color: var(--paper); border-color: var(--line-lime); }

.chip[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.data-table {
  width: 100%;
  font-size: 14.5px;
}

.data-table caption {
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--muted);
}

.data-table th,
.data-table td {
  padding: 11px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.data-table th {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--muted);
}

.data-table td { color: var(--paper); }

.data-table tbody tr { transition: background-color .16s var(--ease); }
.data-table tbody tr:hover { background: rgba(31, 111, 74, .2); }

.data-table .num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.kv {
  display: grid;
  grid-template-columns: minmax(108px, auto) 1fr;
  gap: 10px 22px;
  font-size: 15px;
}

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

.kv-value { color: var(--paper); }

/* 面包屑 */
.breadcrumb { margin-top: 24px; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-item:not(:first-child)::before {
  content: "/";
  color: rgba(154, 166, 160, .55);
}

.breadcrumb-link { color: var(--muted); }
.breadcrumb-link:hover { color: var(--lime); }
.breadcrumb-item[aria-current="page"] { color: var(--paper); }

/* 章节目录跟随 */
.toc { border-left: 1px solid var(--line); }

.toc-title {
  padding-left: 18px;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--muted);
}

.toc-list { display: grid; gap: 2px; }

.toc-link {
  display: block;
  margin-left: -1px;
  padding: 7px 10px 7px 18px;
  border-left: 2px solid transparent;
  font-size: 14px;
  color: var(--muted);
  transition: color .16s var(--ease), border-color .16s var(--ease),
              background-color .16s var(--ease);
}

.toc-link:hover { color: var(--paper); }

.toc-link.is-active {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(198, 255, 61, .07);
}

/* 手风琴 */
.accordion { border-top: 1px solid var(--line); }

.accordion-item { border-bottom: 1px solid var(--line); }

.accordion-trigger {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 4px;
  text-align: left;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16.5px;
  letter-spacing: .03em;
  color: var(--paper);
  transition: color .16s var(--ease);
}

.accordion-trigger::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--lime);
}

.accordion-trigger[aria-expanded="true"] { color: var(--lime); }
.accordion-trigger[aria-expanded="true"]::after { content: "−"; }

.accordion-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .18s var(--ease);
}

.accordion-item[data-open] .accordion-panel { grid-template-rows: 1fr; }

.accordion-body {
  overflow: hidden;
  color: var(--muted);
  font-size: 15.5px;
}

.accordion-item[data-open] .accordion-body { padding-bottom: 20px; }

/* 技能树式路径 */
.steps { display: grid; }

.step {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 18px;
  padding-bottom: 28px;
}

.step::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 40px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.step:last-child { padding-bottom: 0; }
.step:last-child::before { display: none; }

.step-index {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime);
  background: rgba(14, 59, 42, .7);
  border: 1px solid var(--line-lime);
  z-index: 1;
}

.step-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: .03em;
}

.step-body {
  color: var(--muted);
  font-size: 15px;
}

.step-body button {
  margin-top: 8px;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--lime);
  border: 1px solid var(--line-lime);
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.step-body button:hover { background: var(--lime); color: var(--ink); }

.step[data-done] .step-index {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

/* ============ 10. 图片容器基础规则 ============ */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background: var(--green-deep);
  border: 1px solid var(--line);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(20, 24, 27, .05), rgba(20, 24, 27, .6));
}

.media-frame-16x9 { aspect-ratio: 16 / 9; }
.media-frame-4x3 { aspect-ratio: 4 / 3; }
.media-frame-1x1 { aspect-ratio: 1 / 1; }
.media-frame-wide { aspect-ratio: 21 / 9; }

.media-caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--paper);
}

/* ============ 11. 响应式 ============ */
@media (max-width: 1180px) {
  .utility-text { display: none; }
  .footer-top { grid-template-columns: minmax(220px, 1.3fr) repeat(2, minmax(130px, 1fr)); }
  .footer-col.footer-contact { grid-column: 1 / -1; }
}

@media (max-width: 1000px) {
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-rail { grid-template-columns: 1fr; }
  .rail-panel { position: static; }
}

@media (max-width: 900px) {
  body { font-size: 16.5px; }

  .site-header {
    position: relative;
    display: flex;
    flex-direction: column;
  }

  .score-rail { order: -1; }
  .header-upper { order: 0; }
  .header-main { order: 1; }

  .header-main-inner { min-height: 62px; }

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

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 105;
    display: none;
    padding: 8px var(--gutter) 16px;
    background: #101417;
    border-top: 1px solid var(--line-lime);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 44px rgba(0, 0, 0, .6);
  }

  .site-nav[data-open] {
    display: block;
    animation: nav-drop .18s var(--ease);
  }

  @keyframes nav-drop {
    from { opacity: 0; transform: translateY(-8px); }
  }

  .nav-list {
    flex-direction: column;
    gap: 2px;
  }

  .nav-link {
    width: 100%;
    height: auto;
    padding: 12px 12px;
    color: var(--paper);
    border-bottom: 1px solid var(--line-soft);
    box-shadow: none;
  }

  .nav-link[aria-current="page"] {
    background: var(--lime);
    color: var(--ink);
    box-shadow: none;
  }

  .score-rail-inner { min-height: 56px; gap: 12px; }
  .score-num { font-size: 24px; }
  .score-meta { display: none; }
  .score-actions { display: none; }

  .scroll-progress { display: none; }

  .footer-legal { flex-direction: column; align-items: flex-start; }
  .footer-meta { margin-left: 0; }
}

@media (max-width: 680px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .kv { grid-template-columns: 1fr; gap: 4px 0; }
  .kv-value { margin-bottom: 10px; }
  .section { padding-block: 36px; }
  .brand-sub { display: none; }
  .to-top { font-size: 12.5px; padding: 9px 13px; }
}

/* ============ 12. 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;
  }
}