/* ============================================================
   亿兆体育看台 · 西南运营站  /assets/site.css
   共享层：reset、变量、排版、页头、页脚、通用组件
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root {
  --ink-900: #061A14;
  --ink-800: #0B2A20;
  --ink-700: #17402F;
  --paper: #F3EDDF;
  --paper-2: #E4DAC6;
  --cyan: #3DF2C0;
  --amber: #FF9A2E;
  --red: #FF4D5E;
  --moss: #8CA79A;
  --white: #FAF7EF;

  --on-paper: #0C2318;
  --on-paper-soft: #3C4F45;
  --accent-paper: #0A6B52;

  --cyan-soft: rgba(61, 242, 192, 0.16);
  --amber-soft: rgba(255, 154, 46, 0.14);

  --font-display: "Songti SC", "Source Han Serif SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --font-body: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "DejaVu Sans Mono", monospace;

  --shell: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --hdr-min: 68px;

  --radius-s: 4px;
  --radius-m: 12px;
  --radius-l: 24px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --t-fast: 0.18s;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--ink-900);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main,
nav,
header,
footer,
section,
article { display: block; }

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

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

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

a { color: var(--cyan); text-decoration: none; }

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

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

address { font-style: normal; }

#main-content { scroll-margin-top: 132px; }

/* ---------- 3. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
  box-shadow: 0 0 0 6px var(--cyan-soft);
}

.skip-link {
  position: absolute;
  top: 0;
  left: var(--gutter);
  z-index: 200;
  transform: translateY(-160%);
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  font-weight: 700;
  transition: transform var(--t-fast) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -2px;
}

.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;
}

/* ---------- 4. 容器与栅格 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--prose { max-width: 820px; }

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

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

.zone { padding-block: clamp(44px, 7vw, 96px); }

.zone--dark { background: var(--ink-900); color: var(--white); }

.zone--raise {
  background: var(--ink-800);
  color: var(--white);
  border-block: 1px solid var(--ink-700);
}

.zone--paper { background: var(--paper); color: var(--on-paper); }

.zone--paper a:not(.btn) {
  color: var(--accent-paper);
  text-decoration: underline;
  text-decoration-color: rgba(10, 107, 82, 0.35);
  text-underline-offset: 3px;
}

.zone--paper a:not(.btn):hover { text-decoration-color: currentColor; }

/* ---------- 5. 排版 ---------- */
.t-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.t-section {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.t-sub {
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 600;
  line-height: 1.45;
}

.lede {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.8;
  color: var(--moss);
  max-width: 38em;
}

.zone--paper .lede { color: var(--on-paper-soft); }

.mono,
.stat__value,
.tnum {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: clamp(20px, 3vw, 36px);
}

.section-head__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.section-head__title::after {
  content: "";
  display: block;
  width: 44px;
  height: 2px;
  margin-top: 14px;
  background: var(--cyan);
}

.zone--paper .section-head__title::after { background: var(--accent-paper); }

.section-head__lede {
  margin: 0;
  color: var(--moss);
  max-width: 38em;
}

.zone--paper .section-head__lede { color: var(--on-paper-soft); }

.prose {
  max-width: 36em;
  font-size: 17px;
  line-height: 1.75;
}

.prose > * + * { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
}

.prose h2 { font-size: clamp(22px, 2.4vw, 28px); margin-top: 1.8em; }
.prose h3 { font-size: clamp(18px, 1.8vw, 21px); margin-top: 1.6em; }

.prose blockquote {
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--cyan);
  color: var(--moss);
}

.zone--paper .prose blockquote {
  border-left-color: var(--accent-paper);
  color: var(--on-paper-soft);
}

/* ---------- 6. 说明牌与标签 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}

.eyebrow::before {
  content: "";
  width: 14px;
  height: 2px;
  background: currentColor;
}

.zone--paper .eyebrow { color: var(--accent-paper); }

.plate {
  display: inline-block;
  padding: 4px 11px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  background: var(--ink-800);
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.zone--paper .plate {
  background: var(--paper-2);
  border-color: rgba(12, 35, 24, 0.18);
  color: var(--on-paper-soft);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    background-color var(--t-fast) var(--ease),
    box-shadow var(--t-fast) var(--ease);
}

.btn::after {
  content: "→";
  transition: transform var(--t-fast) var(--ease);
}

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

.btn:hover::after { transform: translateX(3px); }

.btn--solid {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
  font-weight: 700;
}

.btn--solid:hover {
  color: var(--ink-900);
  box-shadow: 0 0 0 6px var(--cyan-soft);
}

.btn--ghost { color: var(--white); }

.btn--amber {
  border-color: rgba(255, 154, 46, 0.5);
  color: var(--amber);
}

.btn--amber:hover {
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: 0 0 0 6px var(--amber-soft);
}

/* ---------- 8. 数据卡 ---------- */
.card {
  padding: clamp(16px, 2vw, 24px);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-m);
  background: var(--ink-800);
  transition:
    transform var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

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

.zone--paper .card {
  background: var(--paper-2);
  border-color: rgba(12, 35, 24, 0.16);
}

.zone--paper .card:hover { border-color: var(--accent-paper); }

.stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2vw, 24px);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-m);
  background:
    linear-gradient(180deg, rgba(61, 242, 192, 0.06), transparent 42%),
    var(--ink-800);
}

.stat__value {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--moss);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumbs li { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumbs li + li::before {
  content: "/";
  color: var(--ink-700);
}

.breadcrumbs a { color: var(--moss); }
.breadcrumbs a:hover { color: var(--cyan); }
.breadcrumbs [aria-current="page"] { color: var(--white); }

.zone--paper .breadcrumbs,
.zone--paper .breadcrumbs a { color: var(--on-paper-soft); }
.zone--paper .breadcrumbs [aria-current="page"] { color: var(--on-paper); }

/* ---------- 10. 图片容器（供页面阶段放置占位） ---------- */
.media {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-m);
  background:
    radial-gradient(120% 90% at 12% 6%, rgba(61, 242, 192, 0.1), transparent 60%),
    radial-gradient(90% 80% at 90% 98%, rgba(255, 154, 46, 0.1), transparent 62%),
    linear-gradient(160deg, var(--ink-800), var(--ink-900));
}

.media::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(23, 64, 47, 0.55) 38px 39px),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(23, 64, 47, 0.55) 38px 39px);
  z-index: 0;
}

.media > img,
.media > picture,
.media > svg,
.media > video {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--21x9 { aspect-ratio: 21 / 9; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }

.media__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  margin: 14px;
  padding: 6px 12px;
  border: 1px solid var(--ink-700);
  border-left: 2px solid var(--cyan);
  border-radius: 2px;
  background: rgba(6, 26, 20, 0.88);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- 11. 折叠面板 ---------- */
.disclosure {
  border-bottom: 1px solid var(--ink-700);
}

.zone--paper .disclosure { border-bottom-color: rgba(12, 35, 24, 0.18); }

.disclosure__toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  padding: 18px 4px;
  text-align: left;
  color: inherit;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  cursor: pointer;
}

.disclosure__toggle::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: transform var(--t-fast) var(--ease);
}

.zone--paper .disclosure__toggle::after { color: var(--accent-paper); }

.disclosure[data-open] .disclosure__toggle::after { transform: rotate(45deg); }

.disclosure__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t-fast) var(--ease);
}

.disclosure[data-open] .disclosure__panel { grid-template-rows: 1fr; }

.disclosure__inner {
  overflow: hidden;
  visibility: hidden;
  transition: visibility var(--t-fast) linear;
}

.disclosure[data-open] .disclosure__inner { visibility: visible; }

.disclosure__body {
  padding: 0 4px 22px;
  max-width: 38em;
  color: var(--moss);
}

.zone--paper .disclosure__body { color: var(--on-paper-soft); }

/* ---------- 12. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 26, 20, 0.94);
  border-bottom: 1px solid var(--ink-700);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: var(--hdr-min);
  padding-block: 10px;
  transition: min-height var(--t-fast) var(--ease);
}

.site-header[data-scrolled] .site-header__inner { min-height: 56px; }

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--white);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(150deg, var(--cyan), #0d6b52);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
  transform: rotate(-3deg);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.14;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  transition: opacity var(--t-fast) var(--ease);
}

.site-header[data-scrolled] .brand__tag { opacity: 0.75; }

/* 命令栏导航 */
.primary-nav {
  display: flex;
  margin-inline: auto;
  min-width: 0;
}

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, 0.8vw, 8px);
}

.nav-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 10px;
  border-radius: var(--radius-s);
  color: var(--moss);
  font-size: 14px;
  line-height: 1.3;
  white-space: nowrap;
  transition:
    color var(--t-fast) var(--ease),
    background-color var(--t-fast) var(--ease);
}

.nav-link__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--moss);
  opacity: 0.5;
  transition: color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-fast) var(--ease);
}

.nav-link:hover {
  color: var(--white);
  background: var(--ink-800);
}

.nav-link:hover .nav-link__idx {
  color: var(--cyan);
  opacity: 1;
}

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

.nav-link[aria-current="page"] .nav-link__idx {
  color: var(--cyan);
  opacity: 1;
}

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

/* 状态条 */
.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 6px 13px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  background: var(--ink-800);
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.header-status__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: statusPulse 2.6s var(--ease) infinite;
}

.header-status__compact { display: none; }

.site-header[data-scrolled] .header-status__full { display: none; }
.site-header[data-scrolled] .header-status__compact { display: inline; }

@keyframes statusPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(61, 242, 192, 0.55); }
  50% { box-shadow: 0 0 0 5px rgba(61, 242, 192, 0); }
}

/* 阅读进度 */
.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 5;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0 78%, var(--amber) 78% 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.1s linear;
  pointer-events: none;
}

/* 移动索引按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-pill);
  background: var(--ink-800);
  color: var(--white);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  cursor: pointer;
}

.nav-toggle__bars {
  position: relative;
  width: 16px;
  height: 10px;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
  transition: transform var(--t-fast) var(--ease), top var(--t-fast) var(--ease);
}

.nav-toggle__bars::before { top: 0; }
.nav-toggle__bars::after { top: 8px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 4px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 4px;
  transform: rotate(-45deg);
}

.site-header[data-nav-open] { border-bottom-color: var(--cyan); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 110px);
  padding: clamp(36px, 6vw, 72px) 0 24px;
  background: var(--ink-900);
  border-top: 1px solid var(--ink-700);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: min(320px, 42vw);
  height: 2px;
  background: linear-gradient(90deg, var(--cyan) 0 72%, var(--amber) 72% 100%);
}

.footer-top {
  padding-bottom: clamp(24px, 4vw, 44px);
  border-bottom: 1px dashed var(--ink-700);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  max-width: 46ch;
}

.footer-brand__text {
  color: var(--moss);
  font-size: 15px;
  line-height: 1.75;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
  padding-top: clamp(24px, 4vw, 44px);
}

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

.footer-col__title {
  display: inline-block;
  margin-bottom: 16px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--ink-700);
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
}

.footer-list li + li { margin-top: 10px; }

.footer-link {
  position: relative;
  display: inline-block;
  padding-left: 14px;
  color: var(--white);
  font-size: 15px;
  line-height: 1.6;
  transition: color var(--t-fast) var(--ease);
}

.footer-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--ink-700);
  transition: background-color var(--t-fast) var(--ease), width var(--t-fast) var(--ease);
}

.footer-link:hover { color: var(--cyan); }
.footer-link:hover::before { width: 10px; background: var(--cyan); }

.footer-link--cta { color: var(--amber); }
.footer-link--cta:hover { color: var(--amber); }
.footer-link--cta::before { background: var(--amber); }

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  font-size: 14px;
  line-height: 1.6;
}

.footer-contact__key {
  flex: 0 0 auto;
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.footer-contact__val {
  color: var(--white);
  word-break: break-word;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(28px, 4vw, 48px);
  padding-top: 18px;
  border-top: 1px solid var(--ink-700);
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.footer-bottom__item { margin: 0; }

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1100px) {
  .nav-link__label { font-size: 13px; }
  .nav-link { padding: 9px 7px; }
}

@media (max-width: 960px) {
  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .primary-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin: 0;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    background: var(--ink-900);
    border-bottom: 1px solid var(--ink-700);
    box-shadow: 0 28px 48px -28px rgba(0, 0, 0, 0.92);
  }

  .primary-nav[data-open] { display: block; }

  .primary-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 18px;
  }

  .primary-nav__list > li + li { border-top: 1px dashed var(--ink-700); }

  .nav-link {
    padding: 14px 4px;
    font-size: 16px;
  }

  .nav-link::after {
    left: 4px;
    right: auto;
    bottom: 8px;
    width: 20px;
  }

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

  .primary-nav { padding-top: 0; }

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

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

@media (max-width: 860px) {
  .header-status__full { display: none; }
  .header-status__compact { display: inline; }
}

@media (max-width: 600px) {
  :root { --hdr-min: 60px; }

  .brand__name { font-size: 17px; }
  .brand__mark { width: 30px; height: 30px; font-size: 16px; }

  .header-status {
    padding: 5px 10px;
    font-size: 11px;
    letter-spacing: 0.02em;
  }

  .nav-toggle__label { display: none; }

  .grid--2,
  .grid--3,
  .grid--4 { grid-template-columns: minmax(0, 1fr); }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }

  .prose { font-size: 16px; }
}

/* ---------- 15. 动效偏好 ---------- */
@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;
  }

  .header-status__dot { animation: none; }

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

  .read-progress { transition: none; }
}