/* =========================================================
   K1体育 · 站点共享样式  /assets/site.css
   夜间球场指挥中心 / 记分牌排版语言
   ========================================================= */

/* ---------- 1 · 设计令牌 ---------- */
:root {
  --ink-0: #0A0C0D;
  --ink-1: #14181B;
  --ink-2: #2A3136;
  --cyan: #38F2D0;
  --cyan-soft: #5BF6D9;
  --cyan-deep: #126E63;
  --red: #FF3B4E;
  --yellow: #FFD24A;
  --bone: #F2EFE6;
  --stone: #8C9499;
  --clay: #A85C3E;

  --shell: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 2px;

  --font-display: "Barlow Condensed", "Arial Narrow", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-editorial: "Songti SC", "SimSun", "Source Han Serif SC", Georgia, serif;
  --font-num: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Roboto Mono", "Courier New", monospace;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;

  --step-hero: clamp(44px, 9vw, 132px);
  --step-section: clamp(28px, 4vw, 56px);
  --step-title: clamp(22px, 2.2vw, 28px);
  --step-body: clamp(16px, 1.05vw, 17px);
  --step-meta: 13px;
  --step-tiny: 12px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 180ms;
  --t-mid: 280ms;
}

/* ---------- 2 · 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--ink-0);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: var(--step-body);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, picture, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
strong, b { font-weight: 700; }
em, i { font-style: normal; }

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

main { display: block; }
#main-content { scroll-margin-top: 104px; }

::selection {
  background: var(--cyan);
  color: #04100E;
}

/* ---------- 3 · 布局工具 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid { display: grid; gap: clamp(16px, 2vw, 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)); }
.grid--5-7 { grid-template-columns: 5fr 7fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }

.section { padding-block: clamp(40px, 6vw, 88px); }

.section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.section__eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--cyan);
  flex: none;
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--step-section);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.chapter-no {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(40px, 7vw, 96px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: var(--ink-2);
}

.diagonal-band {
  position: relative;
  padding-block: clamp(28px, 4vw, 56px);
  background: var(--ink-1);
  border-block: 1px solid var(--ink-2);
}

.diagonal-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 22px;
  background: var(--ink-0);
  clip-path: polygon(0 0, 100% 0, 100% 22%, 0 100%);
  pointer-events: none;
}

/* ---------- 4 · 正文与面包屑 ---------- */
.prose {
  max-width: 38em;
  font-size: var(--step-body);
  line-height: 1.85;
  color: rgba(242, 239, 230, 0.86);
}

.prose > * + * { margin-top: 1.1em; }
.prose p { max-width: 34em; }
.prose h2,
.prose h3 {
  font-family: var(--font-editorial);
  font-weight: 600;
  line-height: 1.35;
  color: var(--bone);
}
.prose h2 { font-size: var(--step-title); margin-top: 1.8em; }
.prose h3 { font-size: 19px; margin-top: 1.6em; }
.prose a { color: var(--cyan); text-decoration: underline; text-underline-offset: 3px; }
.prose blockquote {
  padding-left: 18px;
  border-left: 2px solid var(--clay);
  font-family: var(--font-editorial);
  color: var(--stone);
}
.prose ul, .prose ol { padding-left: 1.2em; list-style: disc; }
.prose li + li { margin-top: 0.4em; }

.breadcrumb { padding-block: 16px 0; }
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--stone);
}
.breadcrumb__item { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb__item:not(:last-child)::after { content: "/"; color: var(--ink-2); }
.breadcrumb__link { color: var(--stone); transition: color var(--t-fast) var(--ease); }
.breadcrumb__link:hover { color: var(--cyan); }
.breadcrumb__current { color: var(--bone); }

/* ---------- 5 · 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--ink-2);
  border-radius: var(--radius);
  background: transparent;
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.02em;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}

.btn:hover { transform: translateY(-1px); }

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #04100E;
  font-weight: 700;
}
.btn--primary:hover { background: var(--cyan-soft); border-color: var(--cyan-soft); }
.btn--primary:focus-visible { outline-color: var(--bone); }

.btn--ghost {
  background: transparent;
  border-color: rgba(242, 239, 230, 0.22);
  color: var(--bone);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ---------- 6 · 状态标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid var(--ink-2);
  border-radius: var(--radius);
  background: rgba(242, 239, 230, 0.03);
  color: var(--stone);
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.12em;
  white-space: nowrap;
}
.tag::before { content: ""; width: 5px; height: 5px; background: currentColor; flex: none; }
.tag--red { color: var(--red); border-color: rgba(255, 59, 78, 0.42); background: rgba(255, 59, 78, 0.1); }
.tag--yellow { color: var(--yellow); border-color: rgba(255, 210, 74, 0.42); background: rgba(255, 210, 74, 0.1); }
.tag--cyan { color: var(--cyan); border-color: rgba(56, 242, 208, 0.42); background: rgba(56, 242, 208, 0.09); }
.tag--stone { color: var(--stone); }
.tag--clay { color: #E4A98C; border-color: rgba(168, 92, 62, 0.55); background: rgba(168, 92, 62, 0.16); }

/* ---------- 7 · 纸张资料卡 ---------- */
.paper {
  position: relative;
  padding: clamp(16px, 2vw, 26px);
  background: #F2EFE6;
  border: 1px solid #D9D3C4;
  border-radius: var(--radius);
  color: #14181B;
  box-shadow: 6px 6px 0 -1px var(--ink-1), 6px 6px 0 0 var(--ink-2);
}

.paper__label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 3px 9px;
  background: var(--clay);
  color: #F2EFE6;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  transform: translateY(-1px);
}

/* ---------- 8 · 比分与图片容器 ---------- */
.score {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(10px, 2vw, 20px);
  padding: clamp(14px, 2vw, 22px);
  background: var(--ink-1);
  border: 1px solid var(--ink-2);
  border-radius: var(--radius);
}

.score__team { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.score__team--away { align-items: flex-end; text-align: right; }

.score__name {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.6vw, 19px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.score__meta {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
}

.score__num {
  font-family: var(--font-num);
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--bone);
  font-variant-numeric: tabular-nums;
}
.score__num--lead { color: var(--cyan); }

.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--ink-1);
  border: 1px solid var(--ink-2);
  border-radius: var(--radius);
}
.media > img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { grid-column: auto; aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }

.media__caption {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 10px 12px;
  background: linear-gradient(180deg, rgba(10, 12, 13, 0) 0%, rgba(10, 12, 13, 0.94) 100%);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--bone);
}

/* ---------- 9 · 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background-image: linear-gradient(180deg, rgba(10, 12, 13, 0.96) 0%, rgba(10, 12, 13, 0.72) 72%, rgba(10, 12, 13, 0) 100%);
  background-color: transparent;
  transition:
    background-color var(--t-mid) var(--ease),
    box-shadow var(--t-mid) var(--ease);
}

.site-header.is-pinned {
  background-color: rgba(10, 12, 13, 0.97);
  background-image: none;
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
  box-shadow: inset 0 -1px 0 var(--ink-2), 0 20px 34px -30px #000;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: #04100E;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: top var(--t-fast) var(--ease);
}
.skip-link:focus { top: 12px; }

.header-status {
  background: rgba(20, 24, 27, 0.55);
  border-bottom: 1px solid rgba(242, 239, 230, 0.07);
}

.header-status__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  padding-block: 4px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--stone);
}

.status-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(56, 242, 208, 0.14);
  animation: k1-pulse 2.6s var(--ease) infinite;
}

@keyframes k1-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.header-status__text {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.status-sep { color: var(--ink-2); margin-inline: 4px; }
.status-hint { color: var(--yellow); }

.header-status__meta {
  flex: none;
  color: var(--ink-2);
  letter-spacing: 0.18em;
}

.header-bar__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.2vw, 36px);
  min-height: 78px;
  padding-block: 11px;
  transition: min-height var(--t-mid) var(--ease), padding var(--t-mid) var(--ease);
}

.site-header.is-pinned .header-bar__inner {
  min-height: 64px;
  padding-block: 8px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
  color: var(--bone);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: none;
  background: var(--cyan);
  color: #04100E;
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 78% 100%, 0 100%);
  transition: transform var(--t-fast) var(--ease);
}
.brand:hover .brand__mark { transform: translateY(-1px); }

.brand__text { display: block; }
.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.04em;
  color: var(--bone);
}
.brand__line {
  display: block;
  font-family: var(--font-num);
  font-size: 10.5px;
  line-height: 1.4;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
}

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

.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(8px, 1.4vw, 24px);
}

.nav__link {
  position: relative;
  display: block;
  padding: 10px 2px;
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  white-space: nowrap;
  color: var(--stone);
  transition: color var(--t-fast) var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--t-mid) var(--ease);
}

.nav__link:hover,
.nav__link:focus-visible { color: var(--bone); }
.nav__link:hover::after,
.nav__link:focus-visible::after { transform: scaleX(1); }

.nav__link[aria-current="page"] {
  color: var(--cyan);
  font-weight: 700;
}
.nav__link[aria-current="page"]::after { transform: scaleX(1); }

.nav__foot { display: none; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid rgba(242, 239, 230, 0.22);
  border-radius: var(--radius);
  background: rgba(242, 239, 230, 0.04);
  color: var(--bone);
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition:
    border-color var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease),
    background-color var(--t-fast) var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: background-color var(--t-fast) var(--ease);
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transform-origin: center;
  transition: transform var(--t-fast) var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }

.nav-toggle[aria-expanded="true"] { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.scroll-progress {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-deep) 0%, var(--cyan) 100%);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 60ms linear;
}

/* ---------- 10 · 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 110px);
  background-color: var(--ink-1);
  background-image: repeating-linear-gradient(135deg, rgba(56, 242, 208, 0.028) 0 1px, transparent 1px 9px);
  border-top: 1px solid var(--ink-2);
  color: var(--bone);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-deep) 0%, var(--cyan) 38%, var(--yellow) 66%, var(--red) 100%);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 1.9fr) minmax(240px, 1fr);
  gap: clamp(28px, 4vw, 64px);
  padding-block: clamp(38px, 5vw, 68px) clamp(26px, 3.4vw, 44px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 320px;
}

.footer-brand__head {
  display: flex;
  align-items: center;
  gap: 11px;
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--bone);
}

.footer-brand__tag {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border: 1px solid rgba(56, 242, 208, 0.35);
  border-radius: var(--radius);
  background: rgba(56, 242, 208, 0.07);
  color: var(--cyan);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.footer-brand__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--stone);
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: clamp(20px, 2.6vw, 36px);
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--ink-2);
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--stone);
}

.footer-col__title::before {
  content: "";
  width: 6px;
  height: 6px;
  flex: none;
  background: var(--cyan);
}

.footer-col__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col__link {
  display: inline-block;
  font-size: 14px;
  color: rgba(242, 239, 230, 0.78);
  transition: color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.footer-col__link:hover { color: var(--cyan); transform: translateX(3px); }

.footer-contact__list { display: grid; gap: 12px; }

.footer-contact__item { display: grid; gap: 2px; }

.footer-contact__label {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
}

.footer-contact__value {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--bone);
  word-break: break-word;
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 16px 26px;
  border-top: 1px solid var(--ink-2);
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.footer-update {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--yellow);
}
.footer-update::before { content: ""; width: 6px; height: 6px; flex: none; background: var(--yellow); }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.footer-legal__sep { color: var(--ink-2); }

/* ---------- 11 · 显现动效协议 ---------- */
[data-reveal] { transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }

html.has-js [data-reveal]:not(.is-revealed) {
  opacity: 0;
  transform: translateY(12px);
}

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

/* ---------- 12 · 响应式 · 平板 ---------- */
@media (max-width: 1100px) {
  .nav-toggle { display: inline-flex; }
  .header-actions .btn { display: none; }

  .nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: block;
    flex: none;
    max-height: 0;
    overflow: hidden;
    background: var(--ink-1);
    border-top: 1px solid var(--ink-2);
    box-shadow: 0 24px 40px -28px #000;
    transition: max-height var(--t-mid) var(--ease);
  }

  .site-header .nav[data-open="true"] {
    max-height: min(78dvh, 620px);
    overflow-y: auto;
  }

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

  .nav__list > li + li { border-top: 1px solid rgba(242, 239, 230, 0.07); }

  .nav__link {
    padding: 15px var(--gutter);
    font-size: 16px;
    white-space: normal;
  }

  .nav__link::after { display: none; }

  .nav__link[aria-current="page"] {
    background: rgba(56, 242, 208, 0.08);
    box-shadow: inset 3px 0 0 var(--cyan);
  }

  .nav__foot {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 16px var(--gutter) 22px;
    border-top: 1px solid var(--ink-2);
  }

  .nav__foot .btn {
    width: 100%;
    padding: 13px 16px;
    font-size: 15px;
  }

  body.nav-open { overflow: hidden; }

  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--5-7,
  .grid--4-8 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 13 · 响应式 · 手机 ---------- */
@media (max-width: 900px) {
  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .footer-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .footer-contact { grid-column: 1 / -1; }

  .header-status__meta { display: none; }
}

@media (max-width: 720px) {
  :root { --gutter: 18px; }

  .header-bar__inner { min-height: 66px; }
  .site-header.is-pinned .header-bar__inner { min-height: 58px; }

  .brand__mark { width: 36px; height: 36px; font-size: 12px; }
  .brand__name { font-size: 16px; }
  .brand__line { font-size: 9.5px; letter-spacing: 0.16em; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-base { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .footer-cols { grid-template-columns: minmax(0, 1fr); }
  .header-status__inner { font-size: 10.5px; letter-spacing: 0.1em; }
}

/* ---------- 14 · 可访问性 · 降低动效 ---------- */
@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;
  }

  .scroll-progress__bar { transition: none; }

  html.has-js [data-reveal],
  html.has-js [data-reveal]:not(.is-revealed) {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .footer-col__link:hover { transform: none; }
}