/* =========================================================
   永利官网 · steady-yongli.com.cn
   共享样式表 /assets/site.css
   深色控制台气质：硬边色块 + 细线网格 + 等宽数字锚点
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root {
  --ink-black: #070B12;
  --deep-sea: #0B2036;
  --deep-dive: #123B5C;
  --grid-line: #1E3A52;
  --ice: #E8F1F8;
  --mist: #9FB4C7;
  --alert: #FF6A1A;
  --cyan: #22E0D6;
  --emerald: #0F5A4E;
  --wine: #5A1F2E;
  --status: #35D07F;
  --white: #FFFFFF;

  --bg: var(--ink-black);
  --panel: var(--deep-sea);
  --panel-2: var(--deep-dive);
  --line: var(--grid-line);
  --text: var(--ice);
  --muted: var(--mist);

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;

  --wrap: 1280px;
  --pad: clamp(18px, 4vw, 56px);
  --gap: clamp(20px, 3vw, 40px);
  --head-h: 108px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 130px;
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--ink-black);
  background-image:
    linear-gradient(to right, rgba(30, 58, 82, .28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 58, 82, .28) 1px, transparent 1px);
  background-size: 88px 88px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: clamp(15px, .95vw, 17px);
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, dl, figure, blockquote { margin: 0; }
ul, ol { padding: 0; }
img, svg, video { max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--white); }
mark { background: rgba(34, 224, 214, .18); color: var(--cyan); padding: 0 2px; }
[hidden] { display: none !important; }
.is-hidden { display: none !important; }

::selection { background: var(--cyan); color: #04211F; }

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

/* ---------- 3. 容器 / 排版 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}
.wrap--narrow { max-width: 940px; }

.mono {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .02em;
}

main { display: block; }
#main-content:focus { outline: none; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 11px 18px;
  background: var(--cyan);
  color: #04211F;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  border-radius: 2px;
  transform: translateY(-220%);
  transition: transform .18s var(--ease);
}
.skip-link:focus { transform: translateY(0); color: #04211F; }

/* ---------- 4. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(7, 11, 18, .94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  backdrop-filter: saturate(140%) blur(10px);
}

.header-inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.header-rail {
  position: absolute;
  top: clamp(16px, 2.4vw, 26px);
  right: var(--pad);
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 14px;
}

.version-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.2;
  color: var(--alert);
  background: rgba(255, 106, 26, .09);
  border: 1px solid rgba(255, 106, 26, .45);
  border-radius: 2px;
  padding: 5px 9px;
  white-space: nowrap;
}

.utility-link {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  white-space: nowrap;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.utility-link:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.masthead {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  padding: clamp(20px, 2.6vw, 30px) 0 clamp(13px, 1.7vw, 18px);
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.masthead__brand {
  font-size: clamp(24px, 3.1vw, 34px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: .18em;
  margin-right: -.18em;
  color: var(--white);
  transition: color .16s var(--ease);
}
.masthead__brand:hover { color: var(--white); }

.masthead__tagline {
  position: relative;
  padding-left: 28px;
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--mist);
  white-space: nowrap;
}
.masthead__tagline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 18px;
  height: 1px;
  background: var(--cyan);
}

.nav-toggle {
  display: none;
  position: absolute;
  top: clamp(15px, 2.4vw, 22px);
  left: var(--pad);
  z-index: 4;
  align-items: center;
  gap: 9px;
  min-height: 40px;
  padding: 8px 11px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ice);
  font-size: 12px;
  letter-spacing: .16em;
  cursor: pointer;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}
.nav-toggle:hover { border-color: var(--cyan); color: var(--cyan); }

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle__bars span {
  display: block;
  height: 1.5px;
  background: var(--cyan);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}
.nav-toggle__label { line-height: 1; }

.site-header[data-open] .nav-toggle { border-color: var(--cyan); color: var(--cyan); }
.site-header[data-open] .nav-toggle__bars span:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars span:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

.site-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(2px, 2vw, 34px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 15px 2px 14px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .14em;
  color: var(--mist);
  transition: color .16s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: transparent;
  transition: background-color .16s var(--ease);
}
.site-nav__link:hover { color: var(--ice); }
.site-nav__link:hover::after { background: var(--line); }
.site-nav__link[aria-current="page"] { color: var(--white); font-weight: 700; }
.site-nav__link[aria-current="page"]::after { background: var(--cyan); }

/* ---------- 5. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  background: var(--deep-sea);
  border-top: 1px solid var(--line);
}
.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg,
    var(--alert) 0 25%,
    var(--cyan) 25% 50%,
    var(--emerald) 50% 75%,
    var(--wine) 75% 100%);
}

.footer-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 5vw, 72px) var(--pad) clamp(30px, 3.4vw, 48px);
  display: grid;
  grid-template-columns: minmax(200px, 1.05fr) minmax(0, 1.9fr) minmax(220px, 1.15fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.footer-brand__name {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: .16em;
  color: var(--white);
  margin-bottom: 10px;
}
.footer-brand__line {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
  line-height: 2;
}

.footer-cols {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: clamp(20px, 2.6vw, 36px);
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--mist);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.footer-col__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.footer-col__list a {
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--ice);
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.footer-col__list a:hover { color: var(--cyan); border-bottom-color: var(--cyan); }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--mist);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--line);
}
.footer-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.footer-contact__list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
}
.footer-contact__key {
  font-family: var(--font-mono);
  color: var(--mist);
  letter-spacing: .06em;
}
.footer-contact__val {
  color: var(--ice);
  overflow-wrap: anywhere;
}

.footer-bar {
  border-top: 1px solid var(--line);
}
.footer-bar__inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 18px var(--pad) 26px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}
.footer-bar__icp { font-family: var(--font-mono); }
.footer-bar__meta { color: var(--mist); }
.footer-bar__meta [data-year] { font-family: var(--font-mono); color: var(--ice); }

/* ---------- 6. 段落骨架 ---------- */
.section {
  padding-block: clamp(56px, 8vw, 140px);
}
.section + .section { border-top: 1px solid var(--line); }

.section__head {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(28px, 4vw, 56px);
  max-width: 900px;
}
.section__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .24em;
  color: var(--cyan);
}
.section__eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--cyan);
  flex: none;
}
.section__title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: .04em;
  color: var(--white);
}
.section__lede {
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.divider {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: 0;
}

/* ---------- 7. 网格 ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }

/* ---------- 8. 面板 / 卡片 ---------- */
.panel {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: clamp(20px, 2.6vw, 32px);
}
.panel--emerald { background: var(--emerald); }
.panel--wine { background: var(--wine); }

.card {
  position: relative;
  display: block;
  overflow: hidden;
  padding: clamp(20px, 2.4vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--ice);
  transition: transform .24s var(--ease),
              border-color .24s var(--ease),
              background-color .24s var(--ease),
              box-shadow .24s var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s var(--ease);
}
.card:hover {
  color: var(--ice);
  background: var(--panel-2);
  border-color: rgba(34, 224, 214, .4);
  transform: translateY(-3px) rotate(-1.5deg);
}
.card:hover::before { transform: scaleX(1); }

.card__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--alert);
  margin-bottom: 16px;
}
.card__title {
  display: block;
  font-size: clamp(18px, 1.7vw, 22px);
  font-weight: 900;
  letter-spacing: .06em;
  line-height: 1.35;
  color: var(--white);
  margin-bottom: 8px;
}
.card__text {
  display: block;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.card__meta {
  display: block;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 9. 数字锚点 / 标签 / 状态 ---------- */
.stat { display: grid; gap: 6px; }
.stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(36px, 6vw, 76px);
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  display: block;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--mist);
  background: rgba(18, 59, 92, .5);
  border: 1px solid var(--line);
  border-radius: 2px;
  white-space: nowrap;
}
.tag--alert { color: var(--alert); border-color: rgba(255, 106, 26, .45); background: rgba(255, 106, 26, .08); }
.tag--cyan { color: var(--cyan); border-color: rgba(34, 224, 214, .4); background: rgba(34, 224, 214, .08); }

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--status);
  box-shadow: 0 0 0 3px rgba(53, 208, 127, .16);
  flex: none;
}

/* ---------- 10. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 22px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .12em;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--ice);
  cursor: pointer;
  text-decoration: none;
  transition: background-color .16s var(--ease),
              color .16s var(--ease),
              border-color .16s var(--ease),
              transform .16s var(--ease);
}
.btn:hover { border-color: var(--cyan); color: var(--cyan); transform: translateY(-1px); }
.btn--primary {
  background: var(--alert);
  border-color: var(--alert);
  color: #170800;
}
.btn--primary:hover { background: #FF833F; border-color: #FF833F; color: #170800; }
.btn--ghost { background: transparent; border-color: var(--line); }

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--line); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb--dark { color: #5F7A90; }
.breadcrumb--dark a { color: #5F7A90; }
.breadcrumb--dark li + li::before { color: #9FB4C7; }

/* ---------- 12. 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(180deg, var(--deep-sea), #0A1A2B);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(34, 224, 214, .08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(34, 224, 214, .08) 1px, transparent 1px);
  background-size: 34px 34px;
}
.media > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--wide { aspect-ratio: 21 / 9; }
.media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ice);
  background: rgba(7, 11, 18, .82);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

/* ---------- 13. 筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.filter-btn {
  min-height: 40px;
  padding: 9px 16px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 2px;
  cursor: pointer;
  transition: color .16s var(--ease),
              border-color .16s var(--ease),
              background-color .16s var(--ease);
}
.filter-btn:hover { color: var(--ice); border-color: var(--cyan); }
.filter-btn.is-active {
  color: var(--cyan);
  background: rgba(34, 224, 214, .12);
  border-color: var(--cyan);
}

/* ---------- 14. 检索 ---------- */
.search-field {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 0 16px;
  background: rgba(11, 32, 54, .62);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.search-field:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 224, 214, .12);
}
.search-field input {
  flex: 1 1 auto;
  min-width: 0;
  min-height: 54px;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--ice);
  font-family: var(--font-sans);
  font-size: 16px;
  letter-spacing: .02em;
}
.search-field input::placeholder { color: var(--mist); opacity: .72; }

/* ---------- 15. 锚点条 ---------- */
.anchor-bar {
  position: sticky;
  top: var(--head-h, 108px);
  z-index: 60;
  background: rgba(7, 11, 18, .92);
  border-block: 1px solid var(--line);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.anchor-bar__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.anchor-bar__list::-webkit-scrollbar { display: none; }
.anchor-bar__link {
  display: inline-block;
  padding: 14px 14px 12px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.anchor-bar__link:hover { color: var(--ice); }
.anchor-bar__link.is-active,
.anchor-bar__link[aria-current] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 16. 显现 / 返回顶部 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.to-top {
  position: fixed;
  right: var(--pad);
  bottom: 28px;
  z-index: 80;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: var(--deep-sea);
  border: 1px solid var(--line);
  border-radius: 2px;
  color: var(--cyan);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity .2s var(--ease),
              visibility .2s var(--ease),
              border-color .2s var(--ease);
}
.to-top.is-on { opacity: 1; visibility: visible; }
.to-top:hover { border-color: var(--cyan); }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .footer-inner {
    grid-template-columns: minmax(200px, 1fr) minmax(0, 1.6fr);
  }
  .footer-contact { grid-column: 1 / -1; }
  .footer-contact__list {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

@media (max-width: 920px) {
  .utility-link { display: none; }

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

  .masthead {
    padding-top: clamp(16px, 4vw, 22px);
    padding-bottom: 14px;
  }

  .site-nav {
    max-height: 0;
    overflow: hidden;
    border-top: 1px solid var(--line);
    transition: max-height .3s var(--ease);
  }
  .site-header[data-open] .site-nav {
    max-height: min(72vh, 540px);
    overflow-y: auto;
  }

  .site-nav__list {
    display: block;
    padding: 6px 0 16px;
  }
  .site-nav__list li + li { border-top: 1px solid var(--line); }
  .site-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 56px;
    padding: 0 2px;
    font-size: 15px;
    letter-spacing: .1em;
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] {
    color: var(--cyan);
    box-shadow: inset 2px 0 0 var(--cyan);
    padding-left: 12px;
  }

  .col-4, .col-5, .col-7, .col-8 { grid-column: span 12; }
}

@media (max-width: 640px) {
  :root { --head-h: 96px; }

  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand__line { letter-spacing: .14em; }
  .footer-bar__inner { justify-content: flex-start; }
  .grid-12 { grid-template-columns: 1fr; gap: 18px; }
  .anchor-bar { top: 0; }
  .to-top { right: 16px; bottom: 16px; }
}

@media (max-width: 560px) {
  .masthead { gap: 6px 10px; }
  .masthead__brand { font-size: 21px; letter-spacing: .12em; margin-right: -.12em; }
  .masthead__tagline { font-size: 10px; letter-spacing: .22em; padding-left: 22px; }
  .masthead__tagline::before { width: 14px; }
  .nav-toggle { padding: 8px 9px; font-size: 11px; letter-spacing: .1em; }
  .version-badge { font-size: 11px; padding: 4px 7px; }
}

/* ---------- 18. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
  .card:hover { transform: none; }
  .btn:hover { transform: none; }
}