/* =========================================================
   大江体育主站 · /assets/site.css
   设计语言：夜间比赛控制室 / 堆叠面板 / 编辑部索引
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: #071E2B;
}

body,
h1, h2, h3, h4, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { margin: 0; }

ul, ol { padding: 0; list-style: none; }

img, svg, video, canvas { 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; }
table { width: 100%; border-collapse: collapse; }
hr { border: 0; }

:focus-visible {
  outline: 2px solid #FF8A3D;
  outline-offset: 2px;
  box-shadow: 0 0 0 5px rgba(7, 30, 43, 0.85);
}

/* ---------- 2. 变量 ---------- */
:root {
  --river: #0B4F6C;
  --deep-green: #0F3D3E;
  --orange: #FF8A3D;
  --cyan: #4FD1C5;
  --paper: #F4F7F5;
  --navy: #071E2B;
  --gray: #8FA8A5;
  --yellow: #F2C94C;
  --shallow: #A8DADC;

  --bg-base: #0F3D3E;
  --text: #F4F7F5;
  --text-soft: rgba(244, 247, 245, 0.78);
  --text-dim: #8FA8A5;
  --line-soft: rgba(168, 218, 220, 0.24);
  --line-ink: rgba(7, 30, 43, 0.16);

  --font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --font-body: var(--font-display);
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --shell-max: 1240px;
  --shell-narrow: 820px;
  --gutter: clamp(1rem, 3.5vw, 2.75rem);

  --shadow-panel: 0 26px 50px -34px rgba(7, 30, 43, 0.92);
  --shadow-raise: 8px 8px 0 rgba(79, 209, 197, 0.16), 16px 16px 0 rgba(255, 138, 61, 0.1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100%;
  font-family: var(--font-body);
  font-size: clamp(15px, 0.35vw + 14px, 17px);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    radial-gradient(1000px 620px at 8% -12%, rgba(79, 209, 197, 0.18), transparent 62%),
    radial-gradient(760px 480px at 96% 2%, rgba(255, 138, 61, 0.14), transparent 60%),
    linear-gradient(180deg, #0B4F6C 0%, #0F3D3E 52%, #071E2B 100%);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

h1 { font-size: clamp(2rem, 5.2vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.4rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.5rem); font-weight: 400; }

strong { font-weight: 600; }

main { display: block; }

#main-content { scroll-margin-top: 140px; }

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

.shell--narrow {
  width: min(calc(100% - var(--gutter) * 2), var(--shell-narrow));
  margin-inline: auto;
}

.section { padding-block: clamp(2.5rem, 7vw, 5.5rem); }
.section--tight { padding-block: clamp(1.5rem, 4vw, 3rem); }

.stack { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.stack--tight { display: grid; gap: 0.65rem; }

.grid { display: grid; gap: clamp(1rem, 2.4vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--rail { grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.85fr); }
.grid--index { grid-template-columns: minmax(0, 230px) minmax(0, 1fr); }

.rule {
  height: 1px;
  border: 0;
  background-image: repeating-linear-gradient(90deg, currentColor 0 8px, transparent 8px 15px);
  opacity: 0.32;
}

/* ---------- 5. 索引标签 / 标签 / 按钮 ---------- */
.index-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
}

.index-label::after {
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: 0.35;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.22rem 0.55rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid currentColor;
  white-space: nowrap;
}
.tag--orange { color: var(--orange); }
.tag--cyan { color: var(--cyan); }
.tag--yellow { color: var(--yellow); }
.tag--ink { color: var(--navy); }
.tag--gray { color: var(--gray); }
.tag--solid {
  background: var(--yellow);
  border-color: var(--yellow);
  color: var(--navy);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  border: 1px solid var(--line-soft);
  color: var(--text-soft);
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.chip:hover { border-color: var(--cyan); color: var(--paper); }
.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--navy);
  font-weight: 600;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  transition: transform 0.18s ease, background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--navy);
  font-weight: 600;
}
.btn--primary:hover { background: #FFA463; border-color: #FFA463; transform: translateY(-1px); }
.btn--ghost {
  border-color: rgba(168, 218, 220, 0.5);
  color: var(--paper);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  background: rgba(79, 209, 197, 0.14);
  color: var(--paper);
}
.btn--quiet {
  border-color: var(--line-ink);
  color: var(--navy);
}
.btn--quiet:hover { border-color: var(--orange); color: var(--orange); }

/* ---------- 6. 面板 / 卡片 ---------- */
.panel {
  position: relative;
  padding: clamp(1.25rem, 3vw, 2.25rem);
  background: var(--paper);
  color: var(--navy);
  border: 1px solid var(--line-ink);
  box-shadow: var(--shadow-panel);
}
.panel--ink {
  background: rgba(7, 30, 43, 0.72);
  color: var(--paper);
  border-color: rgba(79, 209, 197, 0.28);
}
.panel--river {
  background: linear-gradient(158deg, #0B4F6C 0%, #0F3D3E 100%);
  color: var(--paper);
  border-color: rgba(79, 209, 197, 0.3);
}
.panel--stack { box-shadow: var(--shadow-raise); }
.panel--edge { border-left: 4px solid var(--orange); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: clamp(1rem, 2.4vw, 1.6rem);
  background: rgba(7, 30, 43, 0.34);
  border: 1px solid var(--line-soft);
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}
.card:hover {
  border-color: rgba(79, 209, 197, 0.6);
  background: rgba(11, 79, 108, 0.44);
  transform: translateY(-2px);
}
.card--paper {
  background: var(--paper);
  color: var(--navy);
  border-color: var(--line-ink);
}
.card--paper:hover { background: #FFFFFF; border-color: rgba(255, 138, 61, 0.6); }
.card__index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--orange);
}
.card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.35;
  letter-spacing: -0.01em;
}
.card__meta {
  font-size: 0.8125rem;
  color: var(--text-dim);
}
.card--paper .card__meta { color: rgba(7, 30, 43, 0.62); }
.card__link {
  margin-top: auto;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
  border-bottom: 1px solid rgba(79, 209, 197, 0.45);
  align-self: flex-start;
}
.card--paper .card__link { color: var(--river); border-bottom-color: rgba(11, 79, 108, 0.4); }

/* ---------- 7. 章节头 / 数据 / 时间轴 ---------- */
.section-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: clamp(1rem, 2.6vw, 1.9rem);
}
.section-head__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.section-head__title {
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  font-weight: 300;
}
.section-head__note {
  max-width: 58ch;
  font-size: 0.9375rem;
  color: inherit;
  opacity: 0.74;
}

.data-figure {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.data-figure__value {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 4.4vw, 2.9rem);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--orange);
}
.data-figure__unit { font-size: 0.8125rem; letter-spacing: 0.1em; opacity: 0.72; }
.data-figure__label {
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  opacity: 0.7;
}

.data-bar {
  position: relative;
  height: 8px;
  width: 100%;
  overflow: hidden;
  background: rgba(143, 168, 165, 0.3);
}
.data-bar__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: calc(var(--v, 0) * 1%);
  background: linear-gradient(90deg, var(--cyan), var(--orange));
}
.data-bar--paper { background: rgba(7, 30, 43, 0.14); }

.timeline {
  position: relative;
  display: grid;
  gap: 1.5rem;
  padding-left: 1.7rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 0.5rem;
  bottom: 0.5rem;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(255, 138, 61, 0.6), transparent);
}
.timeline__item { position: relative; }
.timeline__item::before {
  content: "";
  position: absolute;
  left: -1.55rem;
  top: 0.55rem;
  width: 0.55rem;
  height: 0.55rem;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 138, 61, 0.18);
}

/* ---------- 8. 折叠 / 旁注 / 正文 ---------- */
.fold { border-top: 1px solid var(--line-soft); }
.panel .fold,
.card--paper .fold { border-top-color: var(--line-ink); }

.fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
}
.fold__summary::-webkit-details-marker { display: none; }
.fold__summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--orange);
}
.fold[open] .fold__summary::after { content: "–"; }
.fold__body {
  padding: 0 0 1.15rem;
  font-size: 0.9375rem;
  color: inherit;
  opacity: 0.82;
}

.note {
  padding: 0.45rem 0 0.45rem 1rem;
  border-left: 3px solid var(--orange);
  font-size: 0.875rem;
  line-height: 1.75;
  opacity: 0.86;
}

.prose { max-width: 68ch; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  margin-top: 2.2em;
}
.prose h3 { margin-top: 1.8em; }
.prose p { line-height: 1.85; }
.prose a {
  color: inherit;
  border-bottom: 1px solid var(--orange);
}
.prose strong { color: var(--cyan); }
.prose ul { display: grid; gap: 0.5em; }
.prose ul li {
  position: relative;
  padding-left: 1.1rem;
}
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--cyan);
}
.prose--paper { color: rgba(7, 30, 43, 0.88); }
.prose--paper strong { color: var(--river); }

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--gray);
}
.breadcrumbs a {
  border-bottom: 1px solid rgba(168, 218, 220, 0.4);
  transition: color 0.18s ease, border-color 0.18s ease;
}
.breadcrumbs a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumbs__sep::before { content: "/"; opacity: 0.5; }
.breadcrumbs [aria-current="page"] { color: var(--shallow); }

/* ---------- 10. 图像容器（页面阶段放置 img / svg） ---------- */
.figure { display: grid; gap: 0.6rem; }

.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: var(--media-ratio, 16 / 9);
  overflow: hidden;
  border: 1px solid rgba(7, 30, 43, 0.2);
  background-color: #071E2B;
  background-image:
    radial-gradient(120% 90% at 18% 0%, rgba(79, 209, 197, 0.35), transparent 60%),
    radial-gradient(90% 70% at 86% 18%, rgba(255, 138, 61, 0.28), transparent 62%),
    linear-gradient(180deg, #0B4F6C 0%, #071E2B 100%);
}
.media > img,
.media > picture > img,
.media > svg,
.media > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--tall { --media-ratio: 3 / 4; }
.media--wide { --media-ratio: 21 / 9; }
.media--square { --media-ratio: 1 / 1; }

.media__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(168, 218, 220, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 218, 220, 0.14) 1px, transparent 1px);
  background-size: 48px 48px, 48px 48px;
}

.media__tag { position: absolute; left: 0; bottom: 0; z-index: 2; }

.media__caption {
  margin-top: 0.55rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--gray);
}

/* ---------- 11. 刊头 ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 0;
  z-index: 99;
  transform: translate(-50%, -160%);
  padding: 0.6rem 1.1rem;
  background: var(--orange);
  color: var(--navy);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  transition: transform 0.2s ease;
}
.skip-link:focus { transform: translate(-50%, 0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, #0B4F6C 0%, #0D4455 62%, #0F3D3E 100%);
  border-bottom: 1px solid rgba(79, 209, 197, 0.32);
  box-shadow: 0 20px 42px -30px rgba(7, 30, 43, 0.95);
  color: var(--paper);
}

.masthead {
  width: min(calc(100% - var(--gutter) * 2), var(--shell-max));
  margin-inline: auto;
  padding-block: 0.9rem 1.1rem;
  transition: padding 0.25s ease;
}

.masthead__strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed rgba(168, 218, 220, 0.28);
  transition: padding 0.25s ease;
}

.masthead__kicker {
  display: flex;
  align-items: center;
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  color: var(--shallow);
}

.masthead__kicker-num {
  display: inline-grid;
  place-items: center;
  margin-right: 0.55rem;
  padding: 0.08rem 0.32rem;
  background: var(--cyan);
  color: var(--navy);
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0;
}

.masthead__actions {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-left: auto;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.32rem 0.7rem;
  background: var(--cyan);
  border: 1px solid rgba(7, 30, 43, 0.25);
  color: var(--navy);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.status-badge__dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, 0.24);
  animation: dj-pulse 2.4s ease-in-out infinite;
}

@keyframes dj-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.82); }
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.42rem 0.68rem;
  border: 1px solid rgba(79, 209, 197, 0.45);
  color: var(--paper);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  background: rgba(79, 209, 197, 0.16);
  border-color: var(--cyan);
}

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 1px;
  background: currentColor;
}

.masthead__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  padding: 1rem 0 0.85rem;
  text-align: center;
}

.masthead__brand-name {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.4vw, 3.75rem);
  font-weight: 300;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--paper);
  text-shadow: 0 1px 0 rgba(7, 30, 43, 0.45);
  transition: font-size 0.25s ease, color 0.2s ease;
}
.masthead__brand:hover .masthead__brand-name { color: var(--shallow); }

.masthead__brand-sub {
  font-size: 0.625rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--shallow);
  transition: opacity 0.25s ease;
}

.site-nav {
  padding-top: 0.6rem;
  border-top: 1px solid rgba(168, 218, 220, 0.22);
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.15rem 0.35rem;
}

.site-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.42rem;
  padding: 0.42rem 0.72rem;
  border: 1px solid transparent;
  color: rgba(244, 247, 245, 0.82);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--paper);
  background: rgba(79, 209, 197, 0.13);
  border-color: rgba(79, 209, 197, 0.5);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  color: var(--gray);
}

.site-nav__link[aria-current="page"] {
  color: var(--paper);
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.55);
}
.site-nav__link[aria-current="page"] .site-nav__num { color: var(--orange); }
.site-nav__link[aria-current="page"] .site-nav__label {
  border-bottom: 1px solid var(--orange);
}

.site-header__progress {
  height: 2px;
  width: 100%;
  transform: scaleX(var(--progress, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  transition: transform 0.12s linear;
}

.site-header[data-condensed] .masthead { padding-block: 0.35rem 0.55rem; }
.site-header[data-condensed] .masthead__strip { padding-bottom: 0.5rem; }
.site-header[data-condensed] .masthead__brand { padding: 0.35rem 0 0.3rem; }
.site-header[data-condensed] .masthead__brand-name { font-size: clamp(1.35rem, 3.4vw, 2rem); }
.site-header[data-condensed] .masthead__brand-sub { opacity: 0.55; }

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  padding-bottom: 0.5rem;
  background: linear-gradient(180deg, #0B4F6C 0%, #0F3D3E 40%, #071E2B 100%);
  border-top: 1px solid rgba(79, 209, 197, 0.35);
  color: var(--paper);
}

.site-footer__stack {
  display: grid;
  gap: 4px;
  justify-items: center;
  padding-top: 1.25rem;
}

.site-footer__stack-bar {
  display: block;
  width: min(calc(100% - var(--gutter) * 2), var(--shell-max));
  height: 2px;
  background-image: linear-gradient(90deg, var(--cyan), rgba(79, 209, 197, 0));
}
.site-footer__stack-bar:nth-child(2) {
  width: min(78%, 980px);
  opacity: 0.55;
  background-image: linear-gradient(90deg, var(--orange), rgba(255, 138, 61, 0));
}
.site-footer__stack-bar:nth-child(3) {
  width: min(46%, 620px);
  opacity: 0.4;
  background-image: linear-gradient(90deg, var(--shallow), rgba(168, 218, 220, 0));
}

.site-footer__inner {
  width: min(calc(100% - var(--gutter) * 2), var(--shell-max));
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3.5rem) 0 clamp(1.5rem, 4vw, 2.5rem);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) minmax(0, 1.1fr);
  gap: clamp(1.75rem, 4vw, 3.25rem);
  align-items: start;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.site-footer__tagline {
  margin-top: 0.7rem;
  max-width: 34ch;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.site-footer__lede .btn { margin-top: 1.1rem; }

.site-footer .index-label { color: var(--shallow); }

.site-footer__links {
  display: grid;
  gap: 0.6rem;
  margin-top: 0.95rem;
  font-size: 0.875rem;
}
.site-footer__links a {
  display: inline-block;
  padding-bottom: 1px;
  color: rgba(244, 247, 245, 0.85);
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}
.site-footer__links a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.contact-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 0.95rem;
  font-size: 0.875rem;
}
.contact-list li {
  display: grid;
  grid-template-columns: 3.1rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
}
.contact-list__key {
  padding-top: 0.22rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--cyan);
}
.contact-list__val {
  color: rgba(244, 247, 245, 0.86);
  line-height: 1.65;
  word-break: break-word;
}

.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  align-items: center;
  width: min(calc(100% - var(--gutter) * 2), var(--shell-max));
  margin-inline: auto;
  padding: 1.1rem 0 1.6rem;
  border-top: 1px dashed rgba(168, 218, 220, 0.26);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--gray);
}
.site-footer__icp { font-family: var(--font-mono); color: var(--shallow); }

/* ---------- 13. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 0.68, 0.2, 1);
  transition-delay: var(--reveal-delay, 0s);
}
html.js [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

html.js [data-reveal] .data-bar__fill {
  width: 0;
  transition: width 0.9s cubic-bezier(0.22, 0.68, 0.2, 1) 0.15s;
}
html.js [data-reveal].is-revealed .data-bar__fill {
  width: calc(var(--v, 0) * 1%);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 960px) {
  .grid--2,
  .grid--3,
  .grid--rail,
  .grid--index { grid-template-columns: minmax(0, 1fr); }

  .site-footer__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .site-footer__lede { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    padding-top: 0.5rem;
  }
  .site-nav[data-open] {
    display: block;
    max-height: min(62vh, 430px);
    overflow-y: auto;
    animation: dj-nav-in 0.24s ease both;
  }

  .site-nav__list {
    flex-direction: column;
    gap: 0;
    justify-content: flex-start;
  }
  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    gap: 0.9rem;
    padding: 0.8rem 0.2rem;
    border-bottom: 1px solid rgba(168, 218, 220, 0.16);
  }
  .site-nav__link:hover { background: rgba(79, 209, 197, 0.1); }

  .masthead__brand { padding: 0.85rem 0 0.7rem; }

  .site-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .site-footer__lede { grid-column: auto; }
}

@keyframes dj-nav-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 560px) {
  .masthead__kicker { display: none; }
  .masthead__strip { justify-content: flex-end; }
  .status-badge { font-size: 0.625rem; letter-spacing: 0.08em; padding: 0.28rem 0.55rem; }
  .contact-list li { grid-template-columns: minmax(0, 1fr); gap: 0.15rem; }
  .contact-list__key { padding-top: 0; }
  #main-content { scroll-margin-top: 110px; }
}

@media (min-width: 1100px) {
  .masthead__brand-name { letter-spacing: -0.035em; }
}

/* ---------- 15. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .status-badge__dot { animation: none; }
  .site-nav[data-open] { animation: none; }

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

  html.js [data-reveal] .data-bar__fill,
  html.js [data-reveal].is-revealed .data-bar__fill {
    width: calc(var(--v, 0) * 1%);
    transition: none;
  }

  .btn,
  .card,
  .site-nav__link,
  .site-footer__links a,
  .site-header__progress,
  .skip-link {
    transition: none;
  }
  .btn--primary:hover,
  .card:hover { transform: none; }
}