/* ============================================================
   9397威利斯指南 · 共享样式 /assets/site.css
   夜间操作台：深墨蓝基底 + 琥珀金编号 + 信号橙功能色 + 状态青
   ============================================================ */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  padding-top: var(--rail-h);
  padding-left: 0;
  background-color: #0A1420;
  color: #D7E2EA;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.72;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; }

button { font: inherit; }

[hidden] { display: none !important; }

::selection {
  background: #F2B84B;
  color: #0A1420;
}

/* ---------- tokens ---------- */
:root {
  --ink: #0A1420;
  --panel: #0F1E2E;
  --raise: #16293D;
  --line: #2B4358;
  --amber: #F2B84B;
  --signal: #FF6B35;
  --teal: #35C4A0;
  --text: #D7E2EA;
  --muted: #8FA3B5;
  --glass: rgba(215, 226, 234, 0.10);

  --rail-w: 104px;
  --rail-h: 64px;
  --wrap: 1180px;
  --radius: 4px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --font-serif: "Noto Serif SC", "Source Serif 4", Georgia, serif;
}

@media (min-width: 960px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
    background-image:
      repeating-linear-gradient(to right, rgba(43, 67, 88, 0.30) 0 1px, transparent 1px 96px),
      repeating-linear-gradient(to bottom, rgba(43, 67, 88, 0.22) 0 1px, transparent 1px 96px);
    background-attachment: fixed;
  }
}

/* ---------- 焦点可见 ---------- */
:where(a, button, input, textarea, select, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #EEF4F8;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.9rem); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.5rem); }
h3 { font-size: clamp(1.15rem, 1.7vw, 1.45rem); letter-spacing: -0.01em; }
h4 { font-size: clamp(1rem, 1.3vw, 1.125rem); letter-spacing: 0; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
  opacity: 0.75;
}

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.15rem, 4vw, 3rem);
}

.section {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.prose {
  max-width: 72ch;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text);
}

.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose ul,
.prose ol { padding-left: 1.3em; margin: 0 0 1.2em; }
.prose li { margin-bottom: 0.4em; }
.prose blockquote {
  margin: 1.6em 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--amber);
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.6;
  color: #EEF4F8;
}

.grid-12 {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2.4vw, 2rem);
}

@media (min-width: 760px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .col-4 { grid-column: span 4; }
  .col-5 { grid-column: span 5; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 7; }
  .col-8 { grid-column: span 8; }
  .col-12 { grid-column: span 12; }
}

/* ---------- 面板 / 标签 / 按钮 ---------- */
.panel {
  padding: clamp(1.1rem, 2.4vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(15, 30, 46, 0.96), rgba(12, 24, 38, 0.96));
}

.panel--raise {
  background: linear-gradient(180deg, var(--raise), rgba(13, 27, 42, 0.96));
  border-color: rgba(43, 67, 88, 0.9);
}

.panel--glass {
  background: var(--glass);
  border-color: rgba(43, 67, 88, 0.65);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.26rem 0.56rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(22, 41, 61, 0.65);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.tag--amber { color: var(--amber); border-color: rgba(242, 184, 75, 0.42); }
.tag--teal { color: var(--teal); border-color: rgba(53, 196, 160, 0.42); }
.tag--signal {
  color: #FFCBB8;
  border-color: rgba(255, 107, 53, 0.5);
  background: rgba(255, 107, 53, 0.14);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--raise);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s var(--ease), background-color 0.2s var(--ease),
              border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

.btn--accent {
  background: var(--signal);
  border-color: var(--signal);
  color: #1B0A02;
}

.btn--accent:hover {
  background: #FF8255;
  border-color: #FF8255;
  color: #1B0A02;
}

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

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

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.breadcrumb li { display: flex; align-items: center; gap: 0.5rem; }

.breadcrumb li + li::before {
  content: "/";
  opacity: 0.45;
}

.breadcrumb a {
  text-decoration: none;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}

.breadcrumb a:hover { color: var(--amber); }
.breadcrumb [aria-current="page"] { color: var(--text); }

/* ---------- 可复用图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  margin: 0;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 90% at 15% 0%, rgba(53, 196, 160, 0.10), transparent 60%),
    linear-gradient(150deg, rgba(22, 41, 61, 0.95), rgba(10, 20, 32, 0.98));
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(43, 67, 88, 0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 67, 88, 0.34) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.55;
}

.media__img,
.media > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--portrait { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }

.media__caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- 显现（脚本门控） ---------- */
html[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

/* ============================================================
   HEADER / 侧边轨道
   ============================================================ */
.site-header {
  position: relative;
  z-index: 80;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  padding: 0.7rem 1.2rem;
  background: var(--amber);
  color: #0A1420;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 4px 0;
  transform: translateY(-130%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -4px;
}

.rail {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  height: var(--rail-h);
  padding: 0 1rem;
  background: rgba(10, 20, 32, 0.94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
}

.rail__top {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--text);
}

.brand__num {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.brand__word {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand__tag { display: none; }

/* 移动端目录按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(22, 41, 61, 0.6);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.nav-toggle:hover { border-color: var(--amber); color: var(--amber); }

.nav-toggle__icon {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: var(--amber);
  transition: transform 0.22s var(--ease);
}

.nav-toggle__icon::before { top: 0; }
.nav-toggle__icon::after { bottom: 0; }

.site-header[data-open] .nav-toggle__icon::before {
  transform: translateY(4px) rotate(45deg);
}

.site-header[data-open] .nav-toggle__icon::after {
  transform: translateY(-4px) rotate(-45deg);
}

/* 导航：移动端为抽屉 */
.site-nav {
  position: fixed;
  top: var(--rail-h);
  bottom: 0;
  left: 0;
  z-index: 95;
  display: flex;
  flex-direction: column;
  width: min(320px, 86vw);
  padding: 1.25rem 1rem 2rem;
  background: #0B1826;
  border-right: 1px solid var(--line);
  overflow-y: auto;
  overscroll-behavior: contain;
  visibility: hidden;
  transform: translateX(-102%);
  transition: transform 0.28s var(--ease), visibility 0.28s var(--ease);
}

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

.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.site-nav__item { display: block; }

.site-nav__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.68rem 0.75rem 0.68rem 1rem;
  border-radius: 3px;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.3;
  text-decoration: none;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.site-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45rem;
  bottom: 0.45rem;
  width: 2px;
  background: var(--amber);
  opacity: 0;
  transform: scaleY(0.35);
  transform-origin: center;
  transition: opacity 0.2s var(--ease), transform 0.24s var(--ease);
}

.site-nav__link:hover {
  background: var(--glass);
  color: #FFFFFF;
}

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

.site-nav__link[aria-current="page"]::before {
  opacity: 1;
  transform: scaleY(1);
}

.site-nav__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--muted);
}

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

.site-nav__label { display: inline-block; }

.site-nav__foot {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-top: auto;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.nav-status {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  line-height: 1.55;
  color: var(--muted);
}

.dot {
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 0.42em;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px rgba(53, 196, 160, 0.18);
}

.nav-quick {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-quick a {
  display: inline-block;
  padding: 0.15rem 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}

.nav-quick a:hover { color: var(--amber); }

.site-nav__foot .btn {
  width: 100%;
  font-size: 0.8rem;
  padding: 0.65rem 0.5rem;
}

/* 进度尺 */
.rail__gauge {
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 100%;
  height: 2px;
  background: rgba(43, 67, 88, 0.55);
  pointer-events: none;
}

.rail__gauge-fill {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--amber), var(--signal));
  transform: scaleX(var(--progress, 0));
  transform-origin: left center;
}

/* 抽屉遮罩 */
.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 88;
  background: rgba(4, 10, 17, 0.66);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}

@media (max-width: 959.98px) {
  html.nav-open body { overflow: hidden; }
}

/* 桌面端：竖向轨道 */
@media (min-width: 960px) {
  .skip-link { border-radius: 0 0 4px 0; }

  .rail {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: var(--rail-w);
    height: 100vh;
    height: 100dvh;
    padding: 1.15rem 0 1rem;
    background: linear-gradient(180deg, rgba(22, 41, 61, 0.9), rgba(10, 20, 32, 0.96));
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .rail__top {
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding-inline: 0.4rem;
    flex: none;
  }

  .brand {
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
  }

  .brand__num { font-size: 1.05rem; letter-spacing: 0.04em; }
  .brand__word { font-size: 0.52rem; letter-spacing: 0.22em; }

  .brand__tag {
    display: block;
    margin: 0.85rem auto 0;
    padding: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.53rem;
    letter-spacing: 0.26em;
    line-height: 1.7;
    color: var(--muted);
    opacity: 0.85;
  }

  .nav-toggle { display: none; }

  .site-nav {
    position: static;
    z-index: auto;
    flex: 1 1 auto;
    justify-content: flex-start;
    width: auto;
    min-height: 0;
    padding: 0;
    background: none;
    border: 0;
    overflow-x: hidden;
    overflow-y: auto;
    visibility: visible;
    transform: none;
    transition: none;
    scrollbar-width: thin;
  }

  .site-nav__list {
    align-items: center;
    gap: 0.3rem;
    margin: auto 0;
    padding: 1rem 0;
  }

  .site-nav__link {
    flex-direction: column;
    gap: 0.45rem;
    padding: 0.5rem 0.25rem;
    font-size: 0.8rem;
  }

  .site-nav__link::before {
    left: auto;
    right: -6px;
    top: 0.25rem;
    bottom: 0.25rem;
    transform: scaleY(0.35);
  }

  .site-nav__label {
    writing-mode: vertical-rl;
    letter-spacing: 0.2em;
    line-height: 1.15;
  }

  .site-nav__foot {
    align-items: center;
    gap: 0.7rem;
    margin-top: auto;
    padding: 0.9rem 0.4rem 0;
    border-top: 1px solid rgba(43, 67, 88, 0.65);
  }

  .nav-status {
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.56rem;
    letter-spacing: 0.06em;
    text-align: center;
    line-height: 1.6;
  }

  .dot { margin-top: 0; }

  .nav-quick {
    align-items: center;
    gap: 0.2rem;
  }

  .nav-quick a {
    font-size: 0.58rem;
    letter-spacing: 0.04em;
  }

  .site-nav__foot .btn {
    width: 100%;
    padding: 0.5rem 0.3rem;
    font-size: 0.66rem;
    line-height: 1.35;
  }

  .rail__gauge {
    top: 0;
    right: -1px;
    bottom: auto;
    left: auto;
    width: 2px;
    height: 100%;
  }

  .rail__gauge-fill {
    background: linear-gradient(180deg, var(--amber), var(--signal));
    transform: scaleY(var(--progress, 0));
    transform-origin: top center;
  }

  .nav-scrim { display: none; }
}

@media (min-width: 960px) and (max-height: 800px) {
  .brand__tag { display: none; }
  .nav-quick { display: none; }
  .site-nav__list { gap: 0.1rem; padding: 0.5rem 0; }
  .site-nav__link { font-size: 0.74rem; gap: 0.3rem; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 8vw, 6rem);
  background: linear-gradient(180deg, rgba(15, 30, 46, 0.96) 0%, #08111B 82%);
  border-top: 1px solid var(--line);
  color: var(--text);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(80px, 16vw, 220px);
  height: 2px;
  background: linear-gradient(90deg, var(--amber), rgba(242, 184, 75, 0));
}

.footer__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(2rem, 4.5vw, 3.4rem) clamp(1.15rem, 4vw, 3rem) clamp(1.2rem, 3vw, 2rem);
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 4vw, 3rem);
}

.footer__mark {
  margin: 0 0 0.7rem;
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: #EEF4F8;
}

.footer__mark .mono {
  color: var(--amber);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.footer__summary {
  max-width: 44ch;
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted);
}

.footer__ruler {
  height: 8px;
  margin-top: 1.4rem;
  max-width: 320px;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 12px);
  opacity: 0.85;
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.6rem 1.5rem;
}

.footer__col-title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__links a {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  font-size: 0.94rem;
  color: var(--text);
  text-decoration: none;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer__links a:hover {
  color: var(--amber);
  border-bottom-color: rgba(242, 184, 75, 0.5);
}

.footer__contact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.1rem;
  margin-top: clamp(1.8rem, 3.5vw, 2.6rem);
  padding-top: clamp(1.2rem, 2.5vw, 1.6rem);
  border-top: 1px solid rgba(43, 67, 88, 0.8);
}

.footer__label {
  margin: 0 0 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.footer__value {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
  overflow-wrap: anywhere;
}

.footer__note {
  max-width: 74ch;
  margin: 1.3rem 0 0;
  font-size: 0.8rem;
  line-height: 1.72;
  color: var(--muted);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1.25rem;
  margin-top: clamp(1.5rem, 3vw, 2rem);
  padding-top: 1.1rem;
  border-top: 1px solid rgba(43, 67, 88, 0.8);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.footer__legal p { margin: 0; }

@media (min-width: 760px) {
  .footer__contact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 860px) {
  .footer__top {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
}

/* ============================================================
   无障碍：减少动态
   ============================================================ */
@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;
  }

  .btn:hover { transform: none; }

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