/* ==========================================================================
   模拟试玩中心 — 共享站点样式 /assets/site.css
   深空蓝基底 · 霓虹青路径 · 电光紫结构 · 暖橙操作
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--ink-800);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  -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; }
img, svg, video, canvas { max-width: 100%; height: auto; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 背景层 */
  --ink-900: #06121F;
  --ink-800: #0B1B2B;
  --ink-700: #11283C;
  --ink-600: #162F47;

  /* 线与文字 */
  --line: #2A4A63;
  --line-soft: rgba(42, 74, 99, .55);
  --text: #EAF7FF;
  --muted: #9FB8C9;

  /* 强调 */
  --cyan: #00E5FF;
  --violet: #7C4DFF;
  --violet-soft: #B39DFF;
  --orange: #FF8A3D;
  --green: #3DDC97;
  --amber: #FFD166;

  /* 字体 */
  --font-head: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 度量 */
  --radius: 4px;
  --radius-lg: 8px;
  --header-h: 76px;
  --container: 1240px;
  --gutter: clamp(18px, 4.5vw, 48px);
  --ease: cubic-bezier(.22, .61, .36, 1);
  --grid-line: rgba(42, 74, 99, .38);
}

/* ---------- 3. 中文排版基线 ---------- */
body,
body p,
body li,
body dd,
body td {
  text-wrap: pretty;
}

h1, .h1, h2, .h2, h3, .h3, h4, .h4, .display {
  font-family: var(--font-head);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--text);
}

h1, .h1 { font-size: clamp(2.2rem, 5.6vw, 4.2rem); }
h2, .h2 { font-size: clamp(1.6rem, 3.2vw, 2.5rem); }
h3, .h3 { font-size: clamp(1.15rem, 1.9vw, 1.5rem); line-height: 1.35; }
h4, .h4 { font-size: 1rem; line-height: 1.5; font-weight: 700; }

.display {
  font-size: clamp(2.6rem, 7.4vw, 5.4rem);
  letter-spacing: -.03em;
}

p {
  margin: 0 0 1.05em;
  max-width: 68ch;
  color: var(--text);
}

p:last-child { margin-bottom: 0; }

strong, b { font-weight: 700; color: var(--text); }

/* 等宽数据标签 */
.label-mono,
code, kbd, samp {
  font-family: var(--font-mono);
  font-size: .8em;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 4. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 2px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -130%);
  padding: 10px 22px;
  background: var(--cyan);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: transform .16s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: -3px;
}

/* ---------- 5. 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: 880px; }
.container--wide { max-width: 1480px; }

.section { padding-block: clamp(48px, 7vw, 104px); }

.section__head {
  display: grid;
  gap: 12px;
  max-width: 72ch;
  margin-bottom: clamp(24px, 3.6vw, 46px);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

.rule {
  height: 1px;
  border: 0;
  margin: clamp(28px, 4vw, 56px) 0;
  background: linear-gradient(90deg, var(--line), rgba(42, 74, 99, .15) 62%, transparent);
}

/* ---------- 6. 小标签 / 眉毛文字 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: .75;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(22, 47, 71, .5);
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: var(--muted);
  white-space: nowrap;
}
.tag--cyan { color: var(--cyan); border-color: rgba(0, 229, 255, .45); }
.tag--violet { color: var(--violet-soft); border-color: rgba(124, 77, 255, .55); }
.tag--orange { color: var(--orange); border-color: rgba(255, 138, 61, .5); }

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .02em;
  line-height: 1.2;
  cursor: pointer;
  text-align: center;
  transition: background-color .16s var(--ease), color .16s var(--ease),
              border-color .16s var(--ease), box-shadow .16s var(--ease),
              transform .16s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--cyan);
  color: var(--ink-900);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, .35), 0 14px 34px -22px rgba(0, 229, 255, .9);
}
.btn--primary:hover {
  background: #63F0FF;
  box-shadow: 0 0 0 1px rgba(0, 229, 255, .6), 0 18px 40px -20px rgba(0, 229, 255, .95);
}

.btn--orange {
  background: var(--orange);
  color: var(--ink-900);
  box-shadow: 0 14px 34px -24px rgba(255, 138, 61, .9);
}
.btn--orange:hover { background: #FFA362; }

.btn--ghost {
  background: rgba(22, 47, 71, .55);
  border-color: var(--line);
  color: var(--text);
}
.btn--ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(22, 47, 71, .85);
}

/* ---------- 8. 玻璃卡片 ---------- */
.glass {
  position: relative;
  background: linear-gradient(158deg, rgba(22, 47, 71, .92), rgba(11, 27, 43, .74));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 0 rgba(234, 247, 255, .06),
              0 26px 64px -48px rgba(0, 0, 0, .95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ---------- 9. 图片 / 视觉容器基础规则 ---------- */
.figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, var(--ink-700) 0%, var(--ink-800) 58%, var(--ink-900) 100%);
  overflow: hidden;
  isolation: isolate;
}
.figure::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: .42;
  pointer-events: none;
}
.figure::after {
  content: "";
  position: absolute;
  inset: auto -18% -58% 22%;
  height: 72%;
  z-index: 0;
  background: radial-gradient(closest-side, rgba(0, 229, 255, .26), transparent 72%);
  pointer-events: none;
}

.figure__frame {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.figure__frame img,
.figure__frame svg,
.figure__frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.figure__placeholder {
  padding: 18px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.figure__caption {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  background: rgba(6, 18, 31, .62);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--muted);
}

.figure--square .figure__frame { aspect-ratio: 1 / 1; }
.figure--portrait .figure__frame { aspect-ratio: 3 / 4; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--muted);
  list-style: none;
}
.breadcrumb a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.breadcrumb a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }
.breadcrumb__sep { color: var(--line); }
.breadcrumb [aria-current="page"] { color: var(--text); }

/* ---------- 11. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background-color: rgba(11, 27, 43, .35);
  border-bottom: 1px solid transparent;
  transition: background-color .18s var(--ease),
              border-color .18s var(--ease),
              box-shadow .18s var(--ease);
}
.site-header.is-scrolled {
  background-color: rgba(6, 18, 31, .94);
  border-bottom-color: var(--line);
  box-shadow: 0 18px 40px -34px rgba(0, 0, 0, 1);
  backdrop-filter: blur(14px) saturate(150%);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 34px);
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: var(--header-h);
  transition: min-height .18s var(--ease);
}
.site-header.is-scrolled .site-header__inner { min-height: 64px; }

/* 品牌锁定区 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
}
.brand__mark {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 2px;
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 3px;
  transition: transform .2s var(--ease);
}
.brand__mark span { display: block; border-radius: 1px; }
.brand__mark span:nth-child(1) { background: var(--cyan); }
.brand__mark span:nth-child(2) { background: var(--violet); }
.brand__mark span:nth-child(3) { background: var(--orange); }
.brand__mark span:nth-child(4) { background: rgba(234, 247, 255, .16); }
.brand:hover .brand__mark { transform: rotate(90deg); }

.brand__text { display: grid; gap: 1px; line-height: 1.15; }
.brand__name {
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--text);
}
.brand__tagline {
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 500;
  letter-spacing: .13em;
  text-transform: uppercase;
  color: var(--muted);
}

/* 主导航 */
.nav-primary {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 26px);
  margin-left: auto;
  min-width: 0;
}
.nav-primary__list {
  display: flex;
  align-items: center;
  gap: clamp(2px, .8vw, 10px);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 9px;
  font-size: .89rem;
  font-weight: 500;
  letter-spacing: .01em;
  color: var(--muted);
  white-space: nowrap;
  transition: color .15s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 9px;
  right: 9px;
  bottom: 2px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform .18s var(--ease), background-color .18s var(--ease);
}
.nav-link:hover { color: var(--text); }
.nav-link:hover::after { transform: scaleX(1); }

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

.nav-link--accent { color: var(--text); font-weight: 600; }
.nav-link--accent::after { transform: scaleX(1); }
.nav-link--accent .nav-link__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, .18);
  flex: none;
}

.header-cta {
  flex: none;
  font-size: .85rem;
  padding: 9px 18px;
  margin-left: clamp(4px, 1.2vw, 14px);
}

/* 滚动进度 */
.scroll-progress {
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 55%, var(--orange));
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  will-change: transform;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 9px 14px;
  background: rgba(22, 47, 71, .62);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .14em;
  cursor: pointer;
  transition: border-color .16s var(--ease), color .16s var(--ease),
              background-color .16s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.nav-toggle__bars { display: grid; gap: 4px; width: 16px; }
.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform .18s var(--ease), opacity .18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

html.nav-open { overflow: hidden; }

/* ---------- 12. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--ink-900);
  border-top: 1px solid var(--line);
  color: var(--text);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: -1px 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 22%, var(--violet) 66%, transparent);
  opacity: .7;
}
.site-footer::after {
  content: "";
  position: absolute;
  top: -45%;
  right: -12%;
  width: 62%;
  height: 190%;
  background: radial-gradient(circle at 50% 50%, rgba(124, 77, 255, .16), transparent 62%);
  pointer-events: none;
}

.footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, .75fr) minmax(0, .95fr) minmax(0, 1.1fr);
  gap: clamp(24px, 3.4vw, 56px);
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: clamp(44px, 6vw, 84px) var(--gutter) clamp(28px, 4vw, 52px);
}

.footer__brand { display: grid; align-content: start; gap: 16px; }
.brand--footer { margin-bottom: 2px; }
.brand--footer .brand__name { font-size: 1.08rem; }

.footer__intro {
  margin: 0;
  max-width: 40ch;
  font-size: .93rem;
  line-height: 1.9;
  color: var(--muted);
}
.footer__note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: rgba(159, 184, 201, .78);
}

.footer__col { display: grid; align-content: start; }

.footer__col-title {
  position: relative;
  margin: 0 0 16px;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--cyan);
}
.footer__col-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 138, 61, .16);
}

.footer__links { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }

.footer__link {
  display: inline-block;
  font-size: .92rem;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.footer__link:hover { color: var(--text); border-bottom-color: var(--cyan); }

.footer__contact {
  align-self: start;
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(22, 47, 71, .88), rgba(11, 27, 43, .58));
  box-shadow: inset 0 1px 0 rgba(234, 247, 255, .06);
}
.footer__contact .footer__col-title { color: var(--amber); }
.footer__contact .footer__col-title::before { background: var(--amber); box-shadow: 0 0 0 3px rgba(255, 209, 102, .16); }

.footer__contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.footer__contact-item { display: grid; gap: 2px; }
.footer__contact-key {
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(159, 184, 201, .86);
}
.footer__contact-val {
  font-size: .88rem;
  line-height: 1.7;
  color: var(--text);
  overflow-wrap: anywhere;
}

.footer__bottom {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: 20px var(--gutter) 34px;
  border-top: 1px solid var(--line);
}

.footer__copy,
.footer__icp {
  margin: 0;
  max-width: none;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--muted);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-left: auto;
}
.footer__legal-link {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--muted);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}
.footer__legal-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

/* ---------- 13. 滚动显现（JS 协议） ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition: opacity .22s ease-out, transform .22s ease-out;
  will-change: opacity, transform;
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式：平板 ---------- */
@media (max-width: 1100px) {
  .nav-link { font-size: .84rem; padding: 10px 7px; }
  .header-cta { padding: 8px 14px; font-size: .8rem; }
}

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(28px, 4vw, 44px);
  }
  .footer__brand { grid-column: 1 / -1; }
  .footer__contact { grid-column: 1 / -1; }
  .footer__intro { max-width: 60ch; }
}

/* ---------- 15. 响应式：手机 / 移动导航 ---------- */
@media (max-width: 900px) {
  :root { --header-h: 64px; }

  .site-header__inner {
    justify-content: space-between;
    gap: 10px;
  }

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

  .nav-primary {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    background: rgba(6, 18, 31, .975);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 34px 60px -40px rgba(0, 0, 0, 1);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height .2s var(--ease), visibility .2s var(--ease);
  }
  .nav-primary[data-open] {
    max-height: calc(100vh - var(--header-h));
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    visibility: visible;
  }

  .nav-primary__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 4px 0 0;
  }
  .nav-link {
    padding: 14px var(--gutter);
    font-size: .98rem;
    border-bottom: 1px solid rgba(42, 74, 99, .5);
  }
  .nav-link::after {
    left: 0;
    right: auto;
    top: 0;
    bottom: 0;
    width: 2px;
    height: 100%;
    transform: scaleY(0);
    transform-origin: 50% 0;
  }
  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after,
  .nav-link--accent::after { transform: scaleY(1); }
  .nav-link[aria-current="page"] {
    background: rgba(0, 229, 255, .08);
    color: var(--cyan);
  }
  .nav-link--accent {
    background: rgba(255, 138, 61, .07);
  }
  .nav-link--accent::after { background: var(--orange); }

  .header-cta {
    margin: 16px var(--gutter) 22px;
    width: auto;
    align-self: stretch;
    padding-block: 12px;
    font-size: .92rem;
  }

  .scroll-progress { height: 2px; }
}

@media (max-width: 640px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-bottom: 28px;
  }
  .footer__legal { margin-left: 0; }
  .figure--wide .figure__frame { aspect-ratio: 16 / 10; }
}

@media (max-width: 520px) {
  .brand__tagline { display: none; }
  .brand__name { font-size: .96rem; }
  .nav-toggle__label { display: none; }
  .nav-toggle { padding: 10px 12px; }
}

/* ---------- 16. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

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

  .brand:hover .brand__mark { transform: none; }
}