/* ==========================================================================
   环球体育 / assets/site.css
   共享外壳与基础组件 · 高原竞技指挥舱 · 堆叠面板系统
   ========================================================================== */

/* ---------- 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;
  padding: 0;
}

ul, ol { list-style: none; }

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

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

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

/* ---------- 2. tokens ---------- */
:root {
  /* 色彩体系 */
  --c-night:   #0A1733;  /* 高原夜空蓝 */
  --c-deep:    #12254A;  /* 深空蓝 */
  --c-ice:     #1E3B6E;  /* 冰层蓝 */
  --c-snow:    #F4F7FC;  /* 雪山白 */
  --c-mist:    #DDE6F2;  /* 雾白 */
  --c-signal:  #35D08A;  /* 信号绿 */
  --c-lava:    #FF6B2C;  /* 熔岩橙 */
  --c-glacier: #6FD9E6;  /* 冰晶青 */
  --c-amber:   #FFC24B;  /* 琥珀提示 */
  --c-steel:   #8698B5;  /* 中性灰蓝 */

  --ink:        #F4F7FC;
  --ink-soft:   #C8D5E8;
  --ink-mute:   #8698B5;
  --ink-invert: #16243F;

  /* 字体 */
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-num: ui-monospace, "SFMono-Regular", "Cascadia Mono",
              "Roboto Mono", Menlo, Consolas, monospace;

  /* 字阶 12 / 13 / 16 / 20 / 28 / 40 / 64 */
  --step-1: 12px;
  --step-2: 13px;
  --step-3: 16px;
  --step-4: 20px;
  --step-5: 28px;
  --step-6: 40px;
  --step-7: 64px;

  /* 布局 */
  --bar-h: 62px;
  --bar-h-slim: 52px;
  --gutter: 20px;
  --maxw: 1240px;

  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 22px;

  --line:      rgba(111, 217, 230, 0.24);
  --line-soft: rgba(134, 152, 181, 0.22);

  --glass:    rgba(18, 37, 74, 0.66);
  --glass-hi: rgba(30, 59, 110, 0.82);

  --dur: 180ms;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}

@media (min-width: 768px) {
  :root { --gutter: 32px; }
}

@media (min-width: 1200px) {
  :root { --gutter: 40px; }
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-sans);
  font-size: var(--step-3);
  line-height: 1.75;
  font-weight: 400;
  color: var(--ink-soft);
  background-color: var(--c-night);
  background-image:
    radial-gradient(1100px 620px at 84% -6%, rgba(30, 59, 110, 0.85), rgba(10, 23, 51, 0) 68%),
    radial-gradient(760px 520px at -4% 6%, rgba(255, 107, 44, 0.10), rgba(10, 23, 51, 0) 62%),
    linear-gradient(rgba(111, 217, 230, 0.05) 1px, rgba(0, 0, 0, 0) 1px),
    linear-gradient(90deg, rgba(111, 217, 230, 0.05) 1px, rgba(0, 0, 0, 0) 1px);
  background-size: 100% 100%, 100% 100%, 68px 68px, 68px 68px;
  min-height: 100vh;
  padding-top: var(--bar-h);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (min-width: 768px) {
  body { font-size: 17px; }
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.24;
  color: var(--c-snow);
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(28px, 5vw, 40px); }
h2 { font-size: clamp(22px, 3.6vw, 28px); }
h3 { font-size: var(--step-4); }

strong, b { font-weight: 700; color: var(--c-snow); }

::selection {
  background: var(--c-lava);
  color: #0A1733;
}

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

#main-content { display: block; }

/* ---------- 4. 容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  gap: 20px;
}

.grid--2,
.grid--3,
.grid--split { grid-template-columns: 1fr; }

@media (min-width: 720px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 960px) {
  .grid--split {
    grid-template-columns: minmax(0, 62fr) minmax(0, 34fr);
    gap: 36px;
    align-items: start;
  }
}

.divider {
  height: 1px;
  border: 0;
  margin: 32px 0;
  background: linear-gradient(90deg, var(--c-lava), rgba(255, 107, 44, 0) 72%);
}

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -120px;
  left: var(--gutter);
  z-index: 200;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  background: var(--c-lava);
  color: #0A1733;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.04em;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus { top: 0; }

/* ---------- 6. 顶部命令栏 ---------- */
.command-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  color: var(--c-snow);
  background: linear-gradient(180deg, rgba(10, 23, 51, 0.97), rgba(10, 23, 51, 0.88));
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.command-bar.is-slim {
  background: linear-gradient(180deg, rgba(10, 23, 51, 0.99), rgba(10, 23, 51, 0.94));
  border-bottom-color: rgba(111, 217, 230, 0.36);
}

.command-bar__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
  height: var(--bar-h);
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 24px);
  transition: height var(--dur) var(--ease);
}

.command-bar.is-slim .command-bar__inner { height: var(--bar-h-slim); }

/* 品牌署名 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.brand__mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 15px;
  font-weight: 800;
  color: #0A1733;
  background: linear-gradient(135deg, var(--c-lava), var(--c-amber));
  box-shadow: 0 0 0 1px rgba(255, 194, 75, 0.35);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
}

.brand__name {
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--c-snow);
}

.brand__domain {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  color: var(--c-steel);
}

/* 移动索引开关 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  background: rgba(18, 37, 74, 0.6);
  color: var(--c-snow);
  font-size: var(--step-2);
  font-weight: 700;
  letter-spacing: 0.1em;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.nav-toggle__icon {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle__icon > span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--c-lava);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon > span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon > span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__icon > span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 导航 */
.nav {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  justify-content: center;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 11px;
  border-radius: var(--radius-s);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: 0.03em;
  white-space: nowrap;
  color: var(--c-mist);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.nav__index {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--c-steel);
  transition: color var(--dur) var(--ease);
}

.nav__link:hover {
  color: var(--c-snow);
  background: rgba(30, 59, 110, 0.62);
}

.nav__link[aria-current="page"] { color: var(--c-snow); }

.nav__link[aria-current="page"] .nav__index { color: var(--c-lava); }

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--c-lava);
}

/* 运行状态 */
.command-bar__status {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--c-steel);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-signal);
  box-shadow: 0 0 0 3px rgba(53, 208, 138, 0.16);
  animation: signal-pulse 2.6s var(--ease) infinite;
}

@keyframes signal-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(53, 208, 138, 0.16); }
  50%      { box-shadow: 0 0 0 6px rgba(53, 208, 138, 0.04); }
}

.status-label { color: var(--c-signal); }

.status-sep { color: var(--c-ice); }

.status-stamp { color: var(--c-steel); }

.panel-indicator {
  display: none;
  padding: 2px 8px;
  border: 1px solid rgba(255, 107, 44, 0.5);
  border-radius: 999px;
  color: var(--c-lava);
  font-size: 11px;
  letter-spacing: 0.12em;
}

@media (min-width: 1081px) {
  .panel-indicator { display: inline-block; }
  .panel-indicator[hidden] { display: none; }
}

/* 滚动进度 */
.command-bar__progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--c-lava), var(--c-amber));
}

/* ---------- 7. 移动端索引抽屉 ---------- */
@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .nav {
    position: fixed;
    top: var(--bar-h);
    left: 0;
    right: 0;
    display: block;
    max-height: calc(100vh - var(--bar-h));
    overflow-y: auto;
    padding: 8px var(--gutter) 26px;
    background: rgba(10, 23, 51, 0.985);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 26px 52px rgba(0, 0, 0, 0.55);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                visibility var(--dur) var(--ease);
  }

  .nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav__item + .nav__item {
    border-top: 1px solid rgba(134, 152, 181, 0.14);
  }

  .nav__link {
    padding: 15px 2px;
    border-radius: 0;
    font-size: 16.5px;
  }

  .nav__link:hover {
    background: transparent;
    color: var(--c-lava);
  }

  .nav__link[aria-current="page"] { color: var(--c-lava); }

  .nav__link[aria-current="page"]::after {
    left: 0;
    right: auto;
    top: 50%;
    bottom: auto;
    width: 3px;
    height: 20px;
    border-radius: 0 2px 2px 0;
    transform: translateY(-50%);
  }
}

@media (max-width: 640px) {
  .brand__domain,
  .status-label,
  .status-sep { display: none; }

  .status-stamp { font-size: 11px; }
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  margin-top: 96px;
  background: linear-gradient(180deg, rgba(18, 37, 74, 0.35), var(--c-night) 42%), var(--c-deep);
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 15px;
}

.site-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 56px var(--gutter) 26px;
}

.footer-top {
  display: grid;
  gap: 34px;
}

@media (min-width: 820px) {
  .footer-top {
    grid-template-columns: minmax(190px, 1fr) 2.4fr;
    gap: 48px;
  }
}

.footer-brand__mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 800;
  color: #0A1733;
  background: linear-gradient(135deg, var(--c-lava), var(--c-amber));
}

.footer-brand__name {
  margin-top: 14px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--c-snow);
}

.footer-brand__line {
  margin-top: 6px;
  font-size: var(--step-2);
  color: var(--c-steel);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 26px 20px;
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--step-1);
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--c-glacier);
}

.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--c-lava);
}

.footer-col__list {
  margin-top: 12px;
  display: grid;
  gap: 2px;
}

.footer-link {
  display: inline-block;
  padding: 5px 0;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-link:hover {
  color: var(--c-snow);
  border-bottom-color: var(--c-lava);
}

.footer-mid {
  margin-top: 46px;
  padding-top: 32px;
  border-top: 1px dashed var(--line-soft);
  display: grid;
  gap: 32px;
}

@media (min-width: 820px) {
  .footer-mid {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 40px;
  }
}

.footer-block__title {
  font-size: var(--step-2);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-steel);
}

.footer-facts {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.footer-fact {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 12px;
  font-size: 14.5px;
}

.footer-fact dt {
  font-size: var(--step-2);
  color: var(--c-steel);
}

.footer-fact dd { color: var(--ink-soft); }

@media (max-width: 460px) {
  .footer-fact { grid-template-columns: 1fr; gap: 2px; }
}

.footer-note {
  margin-top: 14px;
  font-size: var(--step-2);
  line-height: 1.7;
  color: var(--c-steel);
}

.footer-legal {
  margin-top: 14px;
  display: grid;
  gap: 4px;
}

.footer-block .btn { margin-top: 16px; }

.footer-base {
  margin-top: 42px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--c-steel);
}

.footer-base__motto { color: rgba(134, 152, 181, 0.72); }

/* ---------- 9. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform var(--dur) var(--ease),
              background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

.btn--primary {
  background: var(--c-lava);
  color: #0A1733;
  box-shadow: 0 10px 26px rgba(255, 107, 44, 0.22);
}

.btn--primary:hover {
  background: #FF8347;
  transform: translateY(-2px);
}

.btn--ghost {
  background: var(--glass);
  border-color: var(--line);
  color: var(--c-snow);
}

.btn--ghost:hover {
  border-color: var(--c-lava);
  background: var(--glass-hi);
  transform: translateY(-2px);
}

.btn--quiet {
  padding: 8px 0;
  color: var(--c-glacier);
  border-bottom: 1px solid rgba(111, 217, 230, 0.45);
  border-radius: 0;
}

.btn--quiet:hover { color: var(--c-lava); border-bottom-color: var(--c-lava); }

/* ---------- 10. 画板面板 ---------- */
[data-panel] {
  position: relative;
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.panel {
  position: relative;
  margin-bottom: 28px;
  padding: 30px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, rgba(18, 37, 74, 0.62), rgba(10, 23, 51, 0.74));
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

@media (min-width: 768px) {
  .panel { padding: 40px 34px; }
}

.panel:hover {
  border-color: rgba(111, 217, 230, 0.42);
  background: linear-gradient(180deg, rgba(30, 59, 110, 0.68), rgba(10, 23, 51, 0.78));
}

[data-panel][data-active="true"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 3px 0 0 3px;
  background: var(--c-lava);
}

.panel--light {
  background: var(--c-snow);
  border-color: transparent;
  color: var(--ink-invert);
}

.panel--light .panel__title,
.panel--light h2,
.panel--light h3,
.panel--light strong { color: #0A1733; }

.panel__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  margin-bottom: 18px;
}

.panel__index {
  font-family: var(--font-num);
  font-size: var(--step-1);
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--c-lava);
}

.panel__title {
  font-size: clamp(22px, 3.4vw, 34px);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--c-snow);
}

.panel__meta {
  margin-left: auto;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-1);
  letter-spacing: 0.05em;
  color: var(--c-steel);
}

.panel__body { min-width: 0; }

/* ---------- 11. 数据卡片 ---------- */
.card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--glass);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(111, 217, 230, 0.44);
  background: var(--glass-hi);
}

.card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-snow);
}

.card__text {
  margin-top: 8px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* ---------- 12. 统计与标签 ---------- */
.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat__value {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 6vw, var(--step-7));
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-snow);
}

.stat__value--lava { color: var(--c-lava); }
.stat__value--signal { color: var(--c-signal); }

.stat__unit {
  margin-left: 4px;
  font-size: 0.42em;
  font-weight: 600;
  color: var(--c-steel);
}

.stat__label {
  font-size: var(--step-2);
  letter-spacing: 0.08em;
  color: var(--c-steel);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.tag--signal { color: var(--c-signal); border-color: rgba(53, 208, 138, 0.45); }
.tag--lava   { color: var(--c-lava);   border-color: rgba(255, 107, 44, 0.5); }
.tag--amber  { color: var(--c-amber);  border-color: rgba(255, 194, 75, 0.5); }

.meta {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: var(--step-1);
  letter-spacing: 0.05em;
  color: var(--c-steel);
}

.meta--signal { color: var(--c-signal); }
.meta--amber  { color: var(--c-amber); }

/* ---------- 13. 图片容器 ---------- */
.figure { margin: 0; }

.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background-color: var(--c-deep);
  background-image:
    linear-gradient(rgba(111, 217, 230, 0.10) 1px, rgba(0, 0, 0, 0) 1px),
    linear-gradient(90deg, rgba(111, 217, 230, 0.10) 1px, rgba(0, 0, 0, 0) 1px),
    radial-gradient(120% 90% at 18% 8%, rgba(30, 59, 110, 0.92), rgba(10, 23, 51, 0) 66%),
    radial-gradient(90% 80% at 88% 92%, rgba(255, 107, 44, 0.18), rgba(10, 23, 51, 0) 62%);
  background-size: 32px 32px, 32px 32px, 100% 100%, 100% 100%;
}

.figure__frame > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.figure__caption {
  margin-top: 10px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.04em;
  color: var(--c-steel);
}

/* ---------- 14. 正文容器 ---------- */
.lede {
  max-width: 60ch;
  font-size: clamp(17px, 2.2vw, var(--step-4));
  line-height: 1.7;
  color: var(--ink-soft);
}

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

@media (min-width: 768px) {
  .prose { font-size: 17px; }
}

.prose > * + * { margin-top: 1.15em; }

.prose h2 {
  margin-top: 1.9em;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--c-snow);
}

.prose h3 {
  margin-top: 1.6em;
  font-size: 19px;
  color: var(--c-snow);
}

.prose a {
  color: var(--c-glacier);
  border-bottom: 1px solid rgba(111, 217, 230, 0.4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.prose a:hover {
  color: var(--c-lava);
  border-bottom-color: var(--c-lava);
}

.prose ul {
  display: grid;
  gap: 8px;
}

.prose ul > li {
  position: relative;
  padding-left: 18px;
}

.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  background: var(--c-signal);
  transform: rotate(45deg);
}

.prose--light { color: var(--ink-invert); }
.prose--light h2,
.prose--light h3,
.prose--light strong { color: #0A1733; }
.prose--light a { color: #1E3B6E; border-bottom-color: rgba(30, 59, 110, 0.4); }

/* ---------- 15. 面包屑 ---------- */
.breadcrumb { margin-bottom: 26px; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: var(--step-1);
  letter-spacing: 0.05em;
  color: var(--c-steel);
}

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

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--c-ice);
}

.breadcrumb__link {
  color: var(--c-steel);
  transition: color var(--dur) var(--ease);
}

.breadcrumb__link:hover { color: var(--c-glacier); }

.breadcrumb__current { color: var(--c-snow); }

/* ---------- 16. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-property: opacity, background-color, border-color, color, visibility !important;
    transition-duration: 140ms !important;
  }

  .btn:hover,
  .card:hover { transform: none !important; }
}