/* ==========================================================================
   开运赛事 · 共享样式表 /assets/site.css
   深靛蓝 × 米白双色场 · 直角细线 · 12° 斜切 · 等宽数据
   ========================================================================== */

/* 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, 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; padding: 0; }

a { color: inherit; }

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

[hidden] { display: none !important; }

/* 2 ── 变量 ─────────────────────────────────────────────────────────────── */
:root {
  /* 主色板 */
  --c-indigo: #101A33;
  --c-night:  #0A1122;
  --c-cream:  #F1EBDF;
  --c-paper:  #FAF7F1;
  --c-stone:  #7C8087;
  --c-moss:   #5E7A52;
  --c-clay:   #B96449;
  --c-cyan:   #3BE0CE;
  --c-orange: #FF7A2F;
  --c-amber:  #E3B341;
  --c-red:    #D2432F;
  --c-ink:    #15171C;

  /* 派生 */
  --line-dark:  rgba(241, 235, 223, 0.14);
  --line-light: rgba(21, 23, 28, 0.14);
  --text-dark-1: #F1EBDF;
  --text-dark-2: rgba(241, 235, 223, 0.66);
  --text-dark-3: rgba(241, 235, 223, 0.42);
  --text-light-1: #15171C;
  --text-light-2: rgba(21, 23, 28, 0.66);
  --wash-dark:   rgba(241, 235, 223, 0.04);

  /* 字体 */
  --font-head: "Arial Narrow", "Helvetica Neue Condensed", "Roboto Condensed",
               "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Noto Sans SC", "PingFang SC",
               "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "IBM Plex Mono",
               Menlo, Consolas, monospace;

  /* 尺寸节奏 */
  --shell-max: 1320px;
  --shell-narrow: 780px;
  --pad-x: clamp(20px, 5vw, 64px);
  --baseline: 24px;
  --gap: clamp(20px, 2.4vw, 32px);

  /* 动效 */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur: 240ms;
}

/* 3 ── 基础排版 ─────────────────────────────────────────────────────────── */
body {
  background-color: var(--c-cream);
  color: var(--c-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.1rem, 5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.6rem); }
h4 { font-size: 1.0625rem; letter-spacing: 0; line-height: 1.35; }

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

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

:focus:not(:focus-visible) { outline: none; }

/* 4 ── 容器 · 章节 · 网格 ───────────────────────────────────────────────── */
.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.shell-narrow {
  width: 100%;
  max-width: var(--shell-narrow);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.section { padding-block: clamp(56px, 8vw, 112px); }
.section--dark { background-color: var(--c-indigo); color: var(--text-dark-1); }
.section--paper { background-color: var(--c-paper); }

.section--dark .note { color: rgba(241, 235, 223, 0.62); }
.section--dark .lede { color: rgba(241, 235, 223, 0.74); }
.section--dark .rule { background-color: var(--line-dark); }
.section--dark h1,
.section--dark h2,
.section--dark h3 { color: var(--text-dark-1); }

.stack > * + * { margin-top: var(--baseline); }

.grid {
  display: grid;
  gap: var(--gap);
}

.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-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.grid-12 > * { grid-column: span 12; }
.grid-12 > .col-4 { grid-column: span 4; }
.grid-12 > .col-6 { grid-column: span 6; }
.grid-12 > .col-8 { grid-column: span 8; }

.rule {
  height: 1px;
  border: 0;
  background-color: var(--line-light);
}

.rule--dark { background-color: var(--line-dark); }

/* 12° 斜切装饰 */
.slant-band { position: relative; overflow: hidden; }

.slant-band::after {
  content: "";
  position: absolute;
  top: -20%;
  left: 58%;
  width: 26%;
  height: 140%;
  background-color: rgba(59, 224, 206, 0.05);
  border-left: 1px solid rgba(59, 224, 206, 0.2);
  transform: skewX(-12deg);
  pointer-events: none;
}

.cut {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%);
}

/* 5 ── 文字组件 ─────────────────────────────────────────────────────────── */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-moss);
}

.eyebrow::before {
  content: "";
  flex: 0 0 auto;
  width: 22px;
  height: 1px;
  background-color: currentColor;
}

.section--dark .eyebrow { color: var(--c-cyan); }

.display-1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.4rem, 6.4vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.display-2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.display-3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.2vw, 1.8rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.lede {
  max-width: 56ch;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.7;
  color: var(--text-light-2);
}

.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.1em; }
.prose p:last-child { margin-bottom: 0; }
.prose ul,
.prose ol { margin: 0 0 1.1em; padding-left: 1.3em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }

.note {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--c-stone);
}

.note--dark { color: var(--text-dark-2); }

.mono-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

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

/* 6 ── 按钮 ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border: 1px solid transparent;
  background-color: transparent;
  color: inherit;
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn-primary {
  background-color: var(--c-orange);
  border-color: var(--c-orange);
  color: var(--c-night);
}

.btn-primary:hover {
  background-color: var(--c-cyan);
  border-color: var(--c-cyan);
}

.btn-ghost {
  border-color: currentColor;
  color: inherit;
}

.btn-ghost:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.btn-sm { padding: 9px 14px; font-size: 0.74rem; }
.btn-block { width: 100%; }

/* 7 ── 标签 · 数据卡 · 展签 · 刻度 ──────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-light);
  background-color: transparent;
  font-family: var(--font-head);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-moss);
}

.tag--cyan  { color: var(--c-cyan);  border-color: rgba(59, 224, 206, 0.42); }
.tag--moss  { color: var(--c-moss);  border-color: rgba(94, 122, 82, 0.42); }
.tag--clay  { color: var(--c-clay);  border-color: rgba(185, 100, 73, 0.42); }
.tag--amber { color: var(--c-amber); border-color: rgba(227, 179, 65, 0.48); }
.tag--red   { color: var(--c-red);   border-color: rgba(210, 67, 47, 0.48); }

.card {
  position: relative;
  background-color: var(--c-paper);
  border: 1px solid var(--line-light);
  padding: clamp(20px, 2.4vw, 32px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--c-cyan);
}

.card--dark {
  background-color: var(--wash-dark);
  border-color: var(--line-dark);
  color: var(--text-dark-1);
}

.card-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.data-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background-color: var(--c-paper);
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--c-cyan);
  padding: 18px 20px;
}

.data-label {
  font-family: var(--font-head);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.data-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1;
  color: var(--c-ink);
}

.data-unit {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--c-stone);
}

.section--dark .data-card {
  background-color: var(--wash-dark);
  border-color: var(--line-dark);
  border-left-color: var(--c-cyan);
}

.section--dark .data-value { color: var(--text-dark-1); }
.section--dark .data-label { color: var(--text-dark-3); }
.section--dark .data-unit  { color: var(--text-dark-3); }

.data-card[data-accent="orange"] { border-left-color: var(--c-orange); }
.data-card[data-accent="amber"]  { border-left-color: var(--c-amber); }
.data-card[data-accent="red"]    { border-left-color: var(--c-red); }
.data-card[data-accent="clay"]   { border-left-color: var(--c-clay); }

.placard {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line-light);
}

.section--dark .placard { border-top-color: var(--line-dark); }

.placard-label {
  font-family: var(--font-head);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.placard-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
}

.meter {
  display: block;
  height: 6px;
  background-color: rgba(124, 128, 135, 0.22);
  overflow: hidden;
}

.meter-fill {
  display: block;
  height: 100%;
  background-color: var(--c-cyan);
}

/* 8 ── 图片容器基础规则（供页面阶段放置图片占位） ───────────────────────── */
.media {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  background-color: var(--c-paper);
  border: 1px solid var(--line-light);
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, rgba(124, 128, 135, 0.16) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(124, 128, 135, 0.16) 0 1px, transparent 1px 32px);
  pointer-events: none;
}

.media img,
.media svg,
.media video {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--dark {
  background-color: var(--c-indigo);
  border-color: var(--line-dark);
}

.media--dark::before {
  background-image:
    repeating-linear-gradient(0deg, rgba(241, 235, 223, 0.09) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(241, 235, 223, 0.09) 0 1px, transparent 1px 32px);
}

.media-3-2  { aspect-ratio: 3 / 2; }
.media-16-9 { aspect-ratio: 16 / 9; }
.media-1-1  { aspect-ratio: 1 / 1; }

.media-caption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 10px;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--c-stone);
}

.media-caption::before {
  content: "";
  flex: 0 0 auto;
  width: 16px;
  height: 1px;
  background-color: var(--c-moss);
  transform: translateY(-4px);
}

/* 9 ── 面包屑 ───────────────────────────────────────────────────────────── */
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--c-stone);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: rgba(124, 128, 135, 0.7);
}

.breadcrumb-link {
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.breadcrumb-link:hover { color: var(--c-cyan); }

.breadcrumb-item[aria-current="page"] { color: var(--c-ink); }

/* 10 ── 页头 ────────────────────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 300;
  padding: 10px 16px;
  background-color: var(--c-cyan);
  color: var(--c-night);
  font-family: var(--font-head);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-decoration: none;
  transition: top var(--dur) var(--ease);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--c-indigo);
  color: var(--text-dark-1);
  border-bottom: 1px solid var(--line-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 3vw, 48px);
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 14px var(--pad-x);
}

.header-left {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 28px);
  min-width: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2vw, 30px);
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  position: relative;
  display: block;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(241, 235, 223, 0.35);
  background-image: linear-gradient(
    135deg,
    transparent calc(50% - 1px),
    var(--c-cyan) calc(50% - 1px),
    var(--c-cyan) calc(50% + 1px),
    transparent calc(50% + 1px)
  );
  transition: border-color var(--dur) var(--ease);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: 5px;
  right: 5px;
  width: 6px;
  height: 6px;
  background-color: var(--c-orange);
}

.brand:hover .brand-mark { border-color: var(--c-cyan); }

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dark-3);
}

.header-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 16px;
  border-left: 1px solid var(--line-dark);
}

.header-tagline {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--text-dark-2);
}

.header-origin {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
}

.site-nav { display: flex; }

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 20px);
}

.nav-item { display: block; }

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 2px;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-dark-2);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background-color: var(--c-cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-link:hover { color: var(--text-dark-1); }
.nav-link:hover::after { transform: scaleX(1); }

.nav-link[aria-current="page"] { color: var(--c-cyan); }

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  background-color: var(--c-orange);
}

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

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line-dark);
  color: var(--text-dark-1);
  font-family: var(--font-head);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 12px;
}

.nav-toggle-bars span {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--c-cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle-bars span:nth-child(1) { top: 0; }
.nav-toggle-bars span:nth-child(2) { top: 5px; }
.nav-toggle-bars span:nth-child(3) { top: 10px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(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(-5px) rotate(-45deg);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  display: block;
  height: 2px;
  background-image: linear-gradient(90deg, var(--c-cyan), var(--c-orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 120ms linear;
}

/* 11 ── 页脚 ────────────────────────────────────────────────────────────── */
.site-footer {
  position: relative;
  overflow: hidden;
  background-color: var(--c-night);
  color: var(--text-dark-1);
}

.footer-slant {
  position: absolute;
  inset: 0;
  display: block;
  overflow: hidden;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(241, 235, 223, 0.045) 0 1px,
    transparent 1px 88px
  );
}

.footer-slant::after {
  content: "";
  position: absolute;
  top: -30%;
  left: 56%;
  width: 30%;
  height: 160%;
  background-color: rgba(59, 224, 206, 0.05);
  border-left: 1px solid rgba(59, 224, 206, 0.16);
  transform: skewX(-12deg);
}

.footer-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 80px);
  padding-block: clamp(48px, 7vw, 88px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 42ch;
}

.footer-summary {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-dark-2);
}

.footer-archive {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--text-dark-3);
}

.footer-archive-value { color: var(--c-cyan); }

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(24px, 3vw, 48px);
}

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

.footer-col-title {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-dark);
  font-family: var(--font-head);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  position: relative;
  display: inline-block;
  font-size: 0.9rem;
  color: var(--text-dark-2);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.footer-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 0;
  height: 1px;
  background-color: var(--c-cyan);
  transition: width var(--dur) var(--ease);
}

.footer-link:hover {
  color: var(--c-cyan);
  padding-left: 16px;
}

.footer-link:hover::before { width: 10px; }

.footer-link[aria-current="page"] { color: var(--c-cyan); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.footer-contact-label {
  font-family: var(--font-head);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-stone);
}

.footer-contact-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-dark-1);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 20px;
  border-top: 1px solid var(--line-dark);
  font-size: 0.76rem;
  color: var(--text-dark-2);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.footer-region {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--text-dark-3);
}

.footer-copy {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--text-dark-2);
}

.footer-note {
  color: var(--text-dark-3);
}

/* 12 ── 筛选 · 显现 · 计数 ─────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.filter-btn {
  padding: 8px 14px;
  border: 1px solid var(--line-light);
  background-color: transparent;
  color: var(--text-light-2);
  font-family: var(--font-head);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.filter-btn:hover {
  border-color: var(--c-cyan);
  color: var(--c-ink);
}

.filter-btn[aria-pressed="true"] {
  background-color: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-night);
}

.section--dark .filter-btn {
  border-color: var(--line-dark);
  color: var(--text-dark-2);
}

.section--dark .filter-btn:hover {
  border-color: var(--c-cyan);
  color: var(--text-dark-1);
}

.section--dark .filter-btn[aria-pressed="true"] {
  background-color: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-night);
}

.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 400ms var(--ease), transform 400ms var(--ease);
}

.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

[data-filter-item].is-entering {
  animation: kaiyun-filter-in 240ms var(--ease) both;
}

@keyframes kaiyun-filter-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* 13 ── 响应式 ──────────────────────────────────────────────────────────── */
@media (max-width: 1180px) {
  .header-meta { display: none; }
}

@media (max-width: 1100px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-brand { max-width: 60ch; }
}

@media (max-width: 980px) {
  .grid-3,
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .grid-12 > .col-4,
  .grid-12 > .col-6,
  .grid-12 > .col-8 { grid-column: span 12; }

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

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: block;
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    background-color: var(--c-night);
    border-top: 1px solid var(--line-dark);
    border-bottom: 1px solid var(--line-dark);
    transition: max-height 320ms var(--ease), visibility 320ms var(--ease);
  }

  .site-nav[data-open] {
    max-height: 72vh;
    overflow-y: auto;
    visibility: visible;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 0;
  }

  .nav-item { border-bottom: 1px solid var(--line-dark); }
  .nav-item:last-child { border-bottom: 0; }

  .nav-link {
    display: block;
    padding: 16px var(--pad-x);
    font-size: 0.95rem;
    letter-spacing: 0.12em;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    background-color: rgba(59, 224, 206, 0.08);
    box-shadow: inset 3px 0 0 0 var(--c-orange);
  }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-col--contact { grid-column: span 2; }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: minmax(0, 1fr); }

  .header-cta { display: none; }

  .header-inner { padding-block: 12px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-col--contact { grid-column: span 1; }

  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* 14 ── 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-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .scroll-progress { transition: none; }
}