/* =========================================================
   天博赛场 · 共享 Site Kit  /assets/site.css
   夜间赛场指挥台：深墨绿底 + 荧光青状态 + 琥珀归档
   ========================================================= */

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

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

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }
img, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --bg-deep: #071512;
  --bg-carbon: #121416;
  --surface-moss: #0F2721;
  --surface-raised: #173C33;
  --line-green: #2C5147;
  --text-primary: #EAF6F1;
  --text-secondary: #A9C2B8;
  --accent-cyan: #38F2D0;
  --accent-cyan-dim: #1B8F7D;
  --accent-amber: #F2B84B;
  --focus-glow: #8BFFE9;
  --ink-on-accent: #04120F;

  --font-head: "Barlow Condensed", "IBM Plex Sans Condensed", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Consolas, "Noto Sans SC", monospace;

  --shell-max: 1280px;
  --gap-xs: 8px;
  --gap-sm: 14px;
  --gap-md: clamp(16px, 2vw, 26px);
  --gap-lg: clamp(24px, 3.4vw, 48px);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --dur: 200ms;
  --ease: cubic-bezier(.32, .72, .3, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(62vw 46vw at 92% -12%, rgba(27, 143, 125, .22), transparent 64%),
    radial-gradient(48vw 38vw at -10% 24%, rgba(44, 81, 71, .34), transparent 68%),
    radial-gradient(40vw 28vw at 62% 106%, rgba(242, 184, 75, .07), transparent 72%);
  background-repeat: no-repeat;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: .01em;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--text-primary);
}
h1 { font-size: clamp(2.25rem, 4.6vw, 3.75rem); }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.35rem); }
h3 { font-size: clamp(1.15rem, 1.8vw, 1.5rem); }
h4 { font-size: 1.05rem; }

p { line-height: 1.7; }

strong, b { color: var(--text-primary); font-weight: 600; }

::selection { background: rgba(56, 242, 208, .28); color: var(--text-primary); }

:focus-visible {
  outline: 2px solid var(--focus-glow);
  outline-offset: 2px;
  box-shadow: 0 0 0 5px rgba(139, 255, 233, .16);
  border-radius: 8px;
}

/* ---------- 4. 容器与节奏 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: clamp(16px, 3vw, 32px);
}

.section { padding-block: clamp(34px, 5vw, 72px); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--gap-sm) var(--gap-lg);
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.section-title { font-size: clamp(1.5rem, 2.4vw, 2.1rem); }

.section-lead {
  max-width: 56ch;
  font-size: 15px;
  color: var(--text-secondary);
}

.panel {
  background: var(--bg-carbon);
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 2.6vw, 32px);
}

.divider {
  height: 1px;
  border: 0;
  margin-block: clamp(20px, 3vw, 36px);
  background: linear-gradient(90deg, var(--line-green), rgba(44, 81, 71, .12));
}

/* ---------- 5. 分屏骨架 ---------- */
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
  gap: clamp(18px, 2.4vw, 38px);
  align-items: start;
}

.split-rail { min-width: 0; }
.split-main { min-width: 0; }

.rail-sticky {
  position: sticky;
  top: 102px;
}

@media (max-width: 1040px) {
  .split-layout { grid-template-columns: minmax(0, 1fr); }
  .rail-sticky { position: static; top: auto; }
}

/* ---------- 6. 头部浮岛 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  padding: 14px clamp(12px, 2vw, 26px);
  background: linear-gradient(180deg,
    rgba(7, 21, 18, .97) 0%,
    rgba(7, 21, 18, .74) 56%,
    rgba(7, 21, 18, 0) 100%);
}

.header-shell {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: var(--shell-max);
  margin-inline: auto;
}

.header-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-amber));
  box-shadow: 0 0 12px rgba(56, 242, 208, .45);
  z-index: 80;
  pointer-events: none;
}

.skip-link {
  position: absolute;
  left: 50%;
  top: 10px;
  z-index: 90;
  transform: translate(-50%, -220%);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background: var(--accent-cyan);
  color: var(--ink-on-accent);
  font-size: 13px;
  font-weight: 700;
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* 品牌浮岛 */
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  padding: 7px 16px 7px 8px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-pill);
  background: rgba(15, 39, 33, .92);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.brand-lockup:hover {
  border-color: var(--accent-cyan-dim);
  background: rgba(23, 60, 51, .95);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ink-on-accent);
  background: conic-gradient(from 210deg, var(--accent-cyan), var(--accent-cyan-dim) 58%, var(--accent-amber));
}

.brand-text { display: block; }

.brand-name {
  display: block;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.1;
  color: var(--text-primary);
}

.brand-sub {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  line-height: 1.3;
  color: var(--text-secondary);
  text-transform: uppercase;
}

/* 栏目浮岛 */
.nav-capsule {
  margin-left: auto;
  padding: 4px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-pill);
  background: rgba(15, 39, 33, .88);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-item { display: block; }

.nav-link {
  display: block;
  padding: 8px 13px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--text-secondary);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-link:hover {
  color: var(--text-primary);
  background: rgba(44, 81, 71, .55);
}
.nav-link[aria-current="page"] {
  background: var(--accent-cyan);
  color: var(--ink-on-accent);
  font-weight: 600;
}
.nav-link[aria-current="page"]:hover {
  background: var(--focus-glow);
  color: var(--ink-on-accent);
}

/* 工具浮岛 */
.header-utility {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 7px 13px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-pill);
  background: rgba(18, 20, 22, .78);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  line-height: 1.4;
  color: var(--text-secondary);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(56, 242, 208, .7);
  animation: status-breathe 3s ease-in-out infinite;
}

@keyframes status-breathe {
  0%, 100% { opacity: .5; box-shadow: 0 0 6px rgba(56, 242, 208, .3); }
  50% { opacity: 1; box-shadow: 0 0 12px rgba(56, 242, 208, .85); }
}

.utility-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--text-secondary);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.utility-link:hover {
  color: var(--accent-cyan);
  background: rgba(44, 81, 71, .42);
}

.cta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: var(--accent-cyan);
  color: var(--ink-on-accent);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.cta-pill:hover {
  background: var(--focus-glow);
  transform: translateY(-1px);
}

/* 移动端展开按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 9px 14px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-pill);
  background: rgba(15, 39, 33, .92);
  color: var(--text-primary);
  font-size: 13px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--accent-cyan-dim); }

.nav-toggle-bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  width: 16px;
  height: 12px;
}
.nav-toggle-bars span {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

.nav-toggle-label { line-height: 1; }

@media (max-width: 1040px) {
  .nav-toggle { display: inline-flex; }

  .nav-capsule {
    position: absolute;
    left: clamp(12px, 2vw, 26px);
    right: clamp(12px, 2vw, 26px);
    top: calc(100% + 4px);
    display: none;
    margin-left: 0;
    padding: 8px;
    border-radius: 20px;
    box-shadow: 0 24px 52px rgba(0, 0, 0, .58);
    max-height: min(72vh, 540px);
    overflow: auto;
  }
  .nav-capsule[data-open] { display: block; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }
  .nav-link {
    padding: 11px 14px;
    border-radius: 14px;
    font-size: 15px;
  }

  .header-utility { margin-left: auto; }
  .utility-link { display: none; }
}

@media (max-width: 640px) {
  .site-header { padding: 10px clamp(10px, 2vw, 16px); }
  .brand-lockup { padding: 6px 14px 6px 6px; gap: 8px; }
  .brand-mark { width: 28px; height: 28px; border-radius: 9px; font-size: 10px; }
  .brand-name { font-size: 15px; }
  .brand-sub { display: none; }
  .status-chip { padding: 8px 10px; gap: 0; }
  .status-text { display: none; }
  .cta-pill { padding: 8px 14px; font-size: 12.5px; }
  .nav-toggle { padding: 9px 12px; }
  .nav-capsule { left: 10px; right: 10px; }
}

@media (max-width: 400px) {
  .status-chip { display: none; }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--bg-carbon);
  border-top: 1px solid var(--line-green);
  color: var(--text-secondary);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 180px;
  background: radial-gradient(62% 100% at 50% 0, rgba(27, 143, 125, .18), transparent 72%);
  pointer-events: none;
}

.footer-shell {
  position: relative;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(30px, 4.6vw, 58px) clamp(16px, 3vw, 32px) 22px;
}

.footer-ticks {
  height: 8px;
  margin-bottom: clamp(22px, 3vw, 36px);
  background-image: repeating-linear-gradient(90deg, var(--line-green) 0 1px, transparent 1px 14px);
  opacity: .6;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(260px, 1.15fr) minmax(0, 2fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.footer-brand { min-width: 0; }

.footer-wordmark {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text-primary);
}

.footer-mono {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-cyan);
}

.footer-tagline {
  margin-top: 10px;
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.footer-contact {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.footer-contact-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  line-height: 1.6;
}

.footer-contact-label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-cyan-dim);
}

.footer-contact-value {
  color: var(--text-primary);
  word-break: break-word;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 32px);
}

.footer-col { min-width: 0; }

.footer-col-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.footer-links {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  display: inline-block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.footer-link:hover {
  color: var(--accent-cyan);
  transform: translateX(2px);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  margin-top: clamp(26px, 4vw, 48px);
  padding-top: 18px;
  border-top: 1px solid rgba(44, 81, 71, .55);
}

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-secondary);
}

.footer-icp {
  padding: 3px 9px;
  border: 1px solid rgba(44, 81, 71, .85);
  border-radius: 7px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--text-secondary);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-legal-link {
  font-size: 12.5px;
  color: var(--text-secondary);
  transition: color var(--dur) var(--ease);
}
.footer-legal-link:hover { color: var(--accent-cyan); }

@media (max-width: 900px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-tagline { max-width: 52ch; }
}

@media (max-width: 600px) {
  .footer-columns { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.3;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan-dim);
  background: var(--surface-raised);
}

.btn--primary {
  background: var(--accent-cyan);
  border-color: transparent;
  color: var(--ink-on-accent);
}
.btn--primary:hover {
  background: var(--focus-glow);
  border-color: transparent;
  color: var(--ink-on-accent);
}

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

.btn--quiet {
  padding-inline: 12px;
  border-color: transparent;
  color: var(--text-secondary);
}
.btn--quiet:hover { background: rgba(44, 81, 71, .45); color: var(--text-primary); }

/* ---------- 9. 索引元素 ---------- */
.mono {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--text-secondary);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent-cyan);
}
.eyebrow::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  opacity: .75;
}

.tag {
  display: inline-block;
  padding: 3px 9px;
  border: 1px solid var(--line-green);
  border-radius: 7px;
  background: rgba(7, 21, 18, .6);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.tag--cyan { color: var(--accent-cyan); border-color: var(--accent-cyan-dim); }
.tag--amber { color: var(--accent-amber); border-color: rgba(242, 184, 75, .5); }

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 2vw, 28px);
}

.stat { min-width: 0; }

.stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.4vw, 1.95rem);
  letter-spacing: .02em;
  line-height: 1.2;
  color: var(--accent-cyan);
}

.stat-label {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ---------- 10. 筛选胶囊 ---------- */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-pill);
  background: rgba(15, 39, 33, .7);
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.chip:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan-dim);
}
.chip[aria-pressed="true"] {
  background: var(--accent-cyan);
  border-color: transparent;
  color: var(--ink-on-accent);
  font-weight: 600;
}

/* ---------- 11. 卡片 ---------- */
.card {
  display: block;
  padding: clamp(16px, 2vw, 24px);
  border: 1px solid var(--line-green);
  border-radius: var(--radius-md);
  background: var(--surface-moss);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan-dim);
  background: var(--surface-raised);
}

.card-title {
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0;
  color: var(--text-primary);
}

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.card-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumb { margin-bottom: clamp(14px, 2vw, 22px); }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--text-secondary);
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line-green);
}

.breadcrumb-link { color: var(--text-secondary); }
.breadcrumb-link:hover { color: var(--accent-cyan); }

.breadcrumb-current { color: var(--text-primary); }

/* ---------- 13. 正文长文 ---------- */
.prose {
  max-width: 70ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-secondary);
}
.prose > * + * { margin-top: 1.05em; }
.prose h2,
.prose h3 {
  margin-top: 1.7em;
  color: var(--text-primary);
}
.prose a {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose ul,
.prose ol {
  padding-left: 1.35em;
  list-style: revert;
}
.prose li + li { margin-top: .4em; }
.prose strong { color: var(--text-primary); }

/* ---------- 14. 图片容器基础 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-green);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(148deg, var(--surface-raised), var(--bg-carbon) 72%),
    repeating-linear-gradient(90deg, rgba(44, 81, 71, .5) 0 1px, transparent 1px 18px);
  aspect-ratio: 16 / 10;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--slant {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
}
.media-frame--slant img { object-position: center 35%; }

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--text-secondary);
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(12px, 2vw, 20px);
}

/* ---------- 15. 显现协议 ---------- */
.has-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 240ms ease, transform 240ms ease;
}
.has-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 16. 工具类 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 17. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

  .status-dot { animation: none; opacity: 1; }

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

  .card:hover,
  .btn:hover,
  .cta-pill:hover,
  .footer-link:hover {
    transform: none;
  }
}