/* ============================================================
   828娱乐 — 共享站点样式 / assets/site.css
   视觉体系：深墨蓝底 · 霓虹青绿 · 琥珀金 · 极简文字建筑
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 18px);
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, dl, dd, dt,
figure, figcaption, blockquote, hr {
  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;
}

a { color: inherit; }

table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #04080f;
  --ink-850: #060c17;
  --ink-800: #08111f;
  --ink-700: #0c1a2c;
  --ink-600: #12243a;
  --ink-500: #1a3049;

  --line: rgba(122, 186, 214, 0.15);
  --line-2: rgba(122, 186, 214, 0.28);
  --line-3: rgba(122, 186, 214, 0.48);

  --cyan: #2ff2d0;
  --cyan-2: #12c3a6;
  --cyan-soft: rgba(47, 242, 208, 0.10);
  --cyan-glow: rgba(47, 242, 208, 0.42);

  --amber: #f5b83d;
  --amber-soft: rgba(245, 184, 61, 0.12);

  --text: #dbe7f4;
  --text-2: #97aec6;
  --text-3: #61788f;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system,
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono",
    "Cascadia Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --wrap: 1320px;
  --gut: clamp(18px, 4vw, 46px);
  --header-h: 66px;
  --ease: cubic-bezier(0.22, 0.72, 0.24, 1);
  --radius: 2px;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink-900);
  background-image:
    radial-gradient(1100px 620px at 10% -12%, rgba(47, 242, 208, 0.09), transparent 62%),
    radial-gradient(920px 540px at 98% 2%, rgba(245, 184, 61, 0.07), transparent 64%),
    linear-gradient(180deg, #050b14 0%, #04080f 62%, #03060c 100%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.78;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, rgba(122, 186, 214, 0.045) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(90deg, rgba(122, 186, 214, 0.045) 0 1px, transparent 1px 96px);
  -webkit-mask-image: radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
  mask-image: radial-gradient(circle at 50% 18%, #000 0%, transparent 78%);
}

main { display: block; position: relative; z-index: 1; }

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.012em;
  color: var(--text);
}

p { text-wrap: pretty; }

strong { color: #eef6ff; font-weight: 600; }

::selection {
  background: rgba(47, 242, 208, 0.26);
  color: #eafffb;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #050a12; }
::-webkit-scrollbar-thumb {
  background: #1b3247;
  border: 2px solid #050a12;
}
::-webkit-scrollbar-thumb:hover { background: #2a4a66; }

/* ---------- 4. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  background: var(--cyan);
  color: #03211c;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
  outline-offset: 3px;
}

/* ---------- 5. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(4, 8, 15, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-2);
  transition: box-shadow 0.3s var(--ease), background-color 0.3s var(--ease);
}

.site-header[data-scrolled] {
  background: rgba(4, 8, 15, 0.96);
  box-shadow: 0 18px 46px -30px rgba(0, 0, 0, 0.95);
}

.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line-2) 0 1px,
    transparent 1px 22px
  );
}

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(14px, 2.4vw, 38px);
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
  min-height: var(--header-h);
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  flex: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border: 1px solid var(--cyan-2);
  background: linear-gradient(150deg, rgba(47, 242, 208, 0.18), rgba(47, 242, 208, 0.02));
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
}

.brand__text { display: block; }

.brand__name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.07em;
  line-height: 1.25;
}

.brand__tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--text-3);
  line-height: 1.4;
}

/* 命令栏导航 */
.site-nav {
  position: static;
  min-width: 0;
}

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  flex-wrap: nowrap;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 11px;
  border: 1px solid transparent;
  color: var(--text-2);
  font-size: 14px;
  letter-spacing: 0.05em;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
    background-color 0.2s var(--ease);
}

.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--text-3);
  transition: color 0.2s var(--ease);
}

.site-nav__link:hover {
  color: var(--text);
  border-color: var(--line-2);
  background: rgba(122, 186, 214, 0.05);
}

.site-nav__link:hover .site-nav__idx { color: var(--cyan); }

.site-nav__link[aria-current="page"] {
  color: var(--cyan);
  border-color: var(--cyan-2);
  background: var(--cyan-soft);
}

.site-nav__link[aria-current="page"] .site-nav__idx { color: var(--amber); }

/* 操作区 */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
  flex: none;
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  white-space: nowrap;
}

.site-header__status::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(47, 242, 208, 0.15);
  animation: sk-pulse 2.8s ease-in-out infinite;
}

@keyframes sk-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 3px rgba(47, 242, 208, 0.15); }
  50% { opacity: 0.55; box-shadow: 0 0 0 6px rgba(47, 242, 208, 0.06); }
}

.site-header__cta {
  padding: 10px 16px;
  font-size: 11px;
  white-space: nowrap;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--cyan-2);
  background: rgba(47, 242, 208, 0.06);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars > span {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.26s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars > span:nth-child(1) {
  transform: translateY(5.5px) 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(-5.5px) rotate(-45deg);
}

/* 滚动进度 */
.scroll-progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(90deg, var(--cyan), var(--amber));
  box-shadow: 0 0 12px var(--cyan-glow);
}

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(64px, 10vw, 140px);
  border-top: 1px solid var(--line-2);
  background-image:
    linear-gradient(180deg, rgba(8, 17, 31, 0.72), rgba(3, 6, 12, 0.98));
  background-color: var(--ink-900);
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 4px;
  pointer-events: none;
  opacity: 0.45;
  background-image: repeating-linear-gradient(
    90deg,
    var(--line-2) 0 1px,
    transparent 1px 22px
  );
}

.site-footer__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(46px, 6vw, 78px) var(--gut) 26px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) minmax(0, 1.3fr);
  gap: clamp(30px, 5vw, 80px);
  padding-bottom: clamp(36px, 5vw, 62px);
  border-bottom: 1px solid var(--line);
}

.site-footer__brand .brand { margin-bottom: 20px; }

.site-footer__desc {
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-3);
}

.site-footer__scale {
  display: flex;
  justify-content: space-between;
  max-width: 280px;
  margin-top: 24px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--text-3);
}

.site-footer__title {
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--amber);
}

.site-footer__list li + li { margin-top: 10px; }

.site-footer__list a {
  display: inline-block;
  font-size: 14.5px;
  color: var(--text-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.site-footer__list a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan-2);
}

.site-footer__list--meta li + li { margin-top: 16px; }

.site-footer__label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
}

.site-footer__value {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.site-footer__note {
  max-width: 40ch;
  margin-top: 18px;
  padding-left: 12px;
  border-left: 2px solid var(--amber-soft);
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--text-3);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 28px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--text-3);
}

.site-footer__icp { color: var(--text-3); }

/* ---------- 7. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 32px);
}

.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)); }

/* ---------- 8. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease),
    color 0.2s var(--ease), transform 0.18s var(--ease);
}

.btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(47, 242, 208, 0.05);
}

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

.btn--primary {
  background: var(--cyan);
  border-color: var(--cyan);
  color: #03211c;
  font-weight: 700;
}

.btn--primary:hover {
  background: #5ff7dd;
  border-color: #5ff7dd;
  color: #03211c;
}

.btn--amber {
  border-color: rgba(245, 184, 61, 0.55);
  color: var(--amber);
}

.btn--amber:hover {
  border-color: var(--amber);
  background: var(--amber-soft);
  color: var(--amber);
}

/* ---------- 9. 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--text-3);
}

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

.crumbs li + li::before {
  content: "/";
  color: var(--line-3);
}

.crumbs a {
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.crumbs a:hover { color: var(--cyan); }

.crumbs [aria-current="page"] { color: var(--text); }

/* ---------- 10. 正文流 ---------- */
.prose {
  max-width: 68ch;
}

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

.prose h2 {
  margin-top: 2.2em;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  line-height: 1.28;
}

.prose h3 {
  margin-top: 1.8em;
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  color: #e7f1fb;
}

.prose ul,
.prose ol {
  padding-left: 1.2em;
}

.prose ul { list-style: none; padding-left: 0; }

.prose ul > li {
  position: relative;
  padding-left: 1.15em;
}

.prose ul > li + li { margin-top: 0.5em; }

.prose ul > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

.prose ol { list-style: decimal; }
.prose ol > li + li { margin-top: 0.5em; }

.prose a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 242, 208, 0.35);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

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

.prose hr {
  height: 1px;
  border: 0;
  background: var(--line-2);
}

/* ---------- 11. 面板 / 卡片 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.2vw, 28px);
  border: 1px solid var(--line);
  background-image: linear-gradient(160deg, rgba(12, 26, 44, 0.72), rgba(6, 12, 23, 0.5));
  background-color: rgba(8, 17, 31, 0.4);
}

.panel::before {
  content: "";
  position: absolute;
  left: -1px;
  top: -1px;
  width: 14px;
  height: 14px;
  border-top: 1px solid var(--cyan);
  border-left: 1px solid var(--cyan);
  opacity: 0.72;
  pointer-events: none;
}

.panel::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 14px;
  height: 14px;
  border-bottom: 1px solid var(--line-3);
  border-right: 1px solid var(--line-3);
  pointer-events: none;
}

/* ---------- 12. 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-2);
  white-space: nowrap;
}

.tag--cyan {
  border-color: var(--cyan-2);
  background: var(--cyan-soft);
  color: var(--cyan);
}

.tag--amber {
  border-color: rgba(245, 184, 61, 0.5);
  background: var(--amber-soft);
  color: var(--amber);
}

/* ---------- 13. 通用文本工具 ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--cyan);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ---------- 14. 图片容器（页面阶段投放） ---------- */
.fig {
  position: relative;
  padding: 10px;
  border: 1px solid var(--line-2);
  background-image: linear-gradient(150deg, rgba(47, 242, 208, 0.05), transparent 55%);
  background-color: var(--ink-800);
}

.fig__frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--ink-700);
  background-image:
    linear-gradient(rgba(122, 186, 214, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 186, 214, 0.1) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.fig__frame > img,
.fig__frame > svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.fig__ph {
  position: relative;
  z-index: 1;
  padding: 6px 10px;
  border: 1px dashed var(--line-2);
  color: var(--text-3);
}

.fig__label {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 2;
  padding: 4px 8px;
  border: 1px solid var(--line-2);
  background: rgba(4, 8, 15, 0.84);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.fig__caption {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--text-3);
}

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

/* ---------- 15. 显现动画 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.72s var(--ease), transform 0.72s var(--ease);
}

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

/* ---------- 16. 平板与移动端 ---------- */
@media (max-width: 1180px) {
  .site-nav__link {
    padding: 9px 9px;
    font-size: 13.5px;
  }
}

@media (max-width: 1120px) {
  .site-header__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 14px var(--gut) 26px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line-2);
    background: rgba(6, 12, 23, 0.985);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    max-height: min(74vh, 620px);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease),
      visibility 0.3s linear;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .site-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 15px 4px;
    border: 0;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }

  .site-nav__link:hover { border-bottom-color: var(--line-2); }

  .site-nav__link[aria-current="page"] {
    background: var(--cyan-soft);
    border-bottom-color: var(--cyan-2);
    padding-left: 10px;
  }

  .site-nav__idx { min-width: 26px; font-size: 11px; }

  .nav-toggle { display: grid; }

  .site-header__status { display: none; }
}

@media (max-width: 900px) {
  .site-footer__top {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

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

@media (max-width: 640px) {
  :root { --header-h: 62px; }

  .brand__tag { display: none; }

  .brand__mark { width: 34px; height: 34px; font-size: 11px; }

  .brand__name { font-size: 15px; }

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

  .site-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 560px) {
  .site-header__cta { display: none; }
}

/* ---------- 17. 降级与无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

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

  .site-nav {
    transition: none !important;
  }
}