/* ==========================================================================
   安博体育主站 · 共享 Site Kit
   /assets/site.css
   01 变量 / 02 重置与排版 / 03 版面容器 / 04 排版组件 / 05 通用组件
   06 页头 / 07 页脚 / 08 动效与无障碍 / 09 响应式
   ========================================================================== */

/* ---------- 01 变量 ---------- */
:root {
  --ab-ink: #0B2B26;
  --ab-ink-2: #103B33;
  --ab-ink-3: #08211D;
  --ab-sand: #E8D7B9;
  --ab-shell: #F7F0E3;
  --ab-paper: #F2E8D5;
  --ab-flare: #F05A28;
  --ab-flare-2: #C8431C;
  --ab-steel: #7F9AA6;
  --ab-mist: #C9D6DA;
  --ab-lamp: #FFC857;
  --ab-turf: #516B5F;
  --ab-alert: #D94A4A;

  --ab-soft: rgba(232, 215, 185, 0.16);
  --ab-soft-2: rgba(232, 215, 185, 0.30);
  --ab-line: rgba(201, 214, 218, 0.22);
  --ab-ink-line: rgba(11, 43, 38, 0.16);

  --ab-font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --ab-font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --ab-font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  --ab-font-hand: "Xingkai SC", "STXingkai", KaiTi, "Kaiti SC", "STKaiti", cursive;

  --ab-cut: 14px;
  --ab-shell-max: 1320px;
  --ab-gutter: clamp(16px, 4vw, 64px);
  --ab-section-y: clamp(56px, 8vw, 120px);
  --ab-ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --ab-shadow: 0 22px 48px -30px rgba(0, 0, 0, 0.75);
}

/* ---------- 02 重置与排版 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--ab-ink);
  background-image:
    radial-gradient(1100px 520px at 84% -6%, rgba(240, 90, 40, 0.13), transparent 62%),
    radial-gradient(900px 480px at 4% 2%, rgba(127, 154, 166, 0.15), transparent 68%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--ab-shell);
  font-family: var(--ab-font-body);
  font-size: clamp(15px, 0.4vw + 14px, 17px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, p, dl, dd, figure { margin: 0; }

button { font: inherit; color: inherit; }

a { color: inherit; }

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

/* ---------- 03 版面容器 ---------- */
.ab-shell {
  width: 100%;
  max-width: var(--ab-shell-max);
  margin: 0 auto;
  padding-left: var(--ab-gutter);
  padding-right: var(--ab-gutter);
}

.ab-shell--narrow { max-width: 880px; }

.ab-section {
  position: relative;
  padding-top: var(--ab-section-y);
  padding-bottom: var(--ab-section-y);
}

.ab-section--sand {
  background-color: var(--ab-paper);
  background-image: linear-gradient(180deg, rgba(232, 215, 185, 0.55), rgba(242, 232, 213, 0.2));
  color: var(--ab-ink);
}

.ab-section--steel {
  background-image: linear-gradient(180deg, rgba(201, 214, 218, 0.14), rgba(201, 214, 218, 0.05));
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
}

.ab-blueprint { position: relative; }

.ab-blueprint::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--ab-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--ab-line) 1px, transparent 1px);
  background-size: calc(100% / 6) 88px;
  opacity: 0.28;
}

.ab-grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 30px);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
}

.ab-split {
  display: grid;
  gap: clamp(24px, 4vw, 64px);
  grid-template-columns: 5fr 7fr;
  align-items: start;
}

.ab-split--flip { grid-template-columns: 7fr 5fr; }

/* ---------- 04 排版组件 ---------- */
.ab-display {
  font-family: var(--ab-font-display);
  font-weight: 200;
  font-size: clamp(48px, 8.4vw, 120px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--ab-shell);
}

.ab-display strong { font-weight: 800; color: var(--ab-flare); }

.ab-h2 {
  font-size: clamp(26px, 3.4vw, 44px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--ab-shell);
}

.ab-h3 {
  font-size: clamp(17px, 1.5vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 10px;
  color: var(--ab-shell);
}

.ab-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ab-steel);
  margin: 0 0 14px;
}

.ab-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background-color: var(--ab-flare);
  flex: none;
}

.ab-lede {
  font-size: clamp(16px, 1.2vw, 19px);
  line-height: 1.8;
  max-width: 62ch;
  color: rgba(247, 240, 227, 0.84);
  margin: 0 0 20px;
}

.ab-mono {
  font-family: var(--ab-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ab-mist);
}

.ab-note {
  display: inline-block;
  font-family: var(--ab-font-hand);
  font-size: 15px;
  line-height: 1.5;
  color: var(--ab-lamp);
  transform: rotate(-1.4deg);
  max-width: 32ch;
}

.ab-stamp {
  display: inline-block;
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ab-lamp);
  border: 1px solid rgba(255, 200, 87, 0.45);
  padding: 6px 10px;
  transform: rotate(-2deg);
}

.ab-section--sand .ab-h2,
.ab-section--sand .ab-h3,
.ab-section--sand .ab-display { color: var(--ab-ink); }

.ab-section--sand .ab-lede { color: rgba(16, 59, 51, 0.82); }

.ab-section--sand .ab-eyebrow { color: var(--ab-turf); }

/* ---------- 05 通用组件 ---------- */
.ab-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 0;
  background-color: var(--ab-flare);
  color: #2A0D04;
  font-family: var(--ab-font-body);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s var(--ab-ease), color 0.2s var(--ab-ease),
    border-color 0.2s var(--ab-ease), box-shadow 0.2s var(--ab-ease);
}

.ab-btn--primary {
  background-color: var(--ab-flare);
  color: #2A0D04;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.18);
}

.ab-btn--primary:hover {
  background-color: var(--ab-flare-2);
  color: #FFF3EA;
}

.ab-btn--ghost {
  background-color: transparent;
  border-color: var(--ab-soft-2);
  color: var(--ab-sand);
}

.ab-btn--ghost:hover {
  background-color: rgba(240, 90, 40, 0.12);
  border-color: var(--ab-flare);
  color: var(--ab-lamp);
}

.ab-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border: 1px solid var(--ab-soft-2);
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  line-height: 1.4;
  color: var(--ab-mist);
}

.ab-tag--flare {
  background-color: var(--ab-flare);
  border-color: var(--ab-flare);
  color: #2A0D04;
  font-weight: 700;
}

.ab-tag--lamp {
  background-color: transparent;
  border-color: var(--ab-lamp);
  color: var(--ab-lamp);
}

.ab-tag--steel {
  background-color: rgba(127, 154, 166, 0.16);
  border-color: transparent;
  color: var(--ab-mist);
}

.ab-tag--sand {
  background-color: var(--ab-sand);
  border-color: var(--ab-sand);
  color: var(--ab-ink);
  font-weight: 700;
}

.ab-card {
  position: relative;
  background-color: rgba(16, 59, 51, 0.74);
  border: 1px solid var(--ab-soft);
  padding: clamp(18px, 2.2vw, 28px);
  clip-path: polygon(var(--ab-cut) 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%, 0 var(--ab-cut));
  transition: transform 0.22s var(--ab-ease), border-color 0.22s var(--ab-ease),
    background-color 0.22s var(--ab-ease);
}

.ab-card:hover {
  transform: translateY(-3px);
  border-color: rgba(240, 90, 40, 0.55);
  background-color: rgba(16, 59, 51, 0.9);
}

.ab-card--paper {
  background-color: var(--ab-paper);
  border-color: var(--ab-ink-line);
  color: var(--ab-ink);
}

.ab-card--paper .ab-card__title { color: var(--ab-ink); }

.ab-card__index {
  display: block;
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ab-steel);
  margin-bottom: 12px;
}

.ab-card__title {
  font-size: clamp(17px, 1.5vw, 21px);
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 8px;
  color: var(--ab-shell);
}

.ab-card__meta {
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ab-steel);
  margin: 0;
}

.ab-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 32px);
  padding: 0;
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ab-steel);
}

.ab-breadcrumb a {
  color: var(--ab-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ab-ease), border-color 0.18s var(--ab-ease);
}

.ab-breadcrumb a:hover {
  color: var(--ab-lamp);
  border-bottom-color: var(--ab-lamp);
}

.ab-breadcrumb__sep { color: var(--ab-flare); }

.ab-prose {
  max-width: 72ch;
  font-size: clamp(15px, 0.4vw + 14px, 17px);
  line-height: 1.85;
  color: rgba(247, 240, 227, 0.86);
}

.ab-prose p { margin: 0 0 1.1em; }

.ab-prose h3 {
  font-size: clamp(18px, 1.5vw, 22px);
  font-weight: 700;
  margin: 1.7em 0 0.6em;
  color: var(--ab-shell);
}

.ab-prose ul,
.ab-prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.3em;
}

.ab-prose ul { list-style: disc; }
.ab-prose ol { list-style: decimal; }
.ab-prose li { margin-bottom: 0.45em; }

.ab-prose a {
  color: var(--ab-lamp);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 200, 87, 0.5);
}

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

.ab-section--sand .ab-prose { color: rgba(16, 59, 51, 0.9); }
.ab-section--sand .ab-prose h3 { color: var(--ab-ink); }
.ab-section--sand .ab-prose a { color: var(--ab-flare-2); border-bottom-color: rgba(200, 67, 28, 0.5); }

.ab-media {
  position: relative;
  overflow: hidden;
  background-image: linear-gradient(140deg, rgba(16, 59, 51, 0.95), rgba(8, 33, 29, 0.95));
  border: 1px solid var(--ab-soft);
  clip-path: polygon(var(--ab-cut) 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%, 0 var(--ab-cut));
}

.ab-media img,
.ab-media video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ab-media--wide { aspect-ratio: 16 / 9; }
.ab-media--photo { aspect-ratio: 4 / 3; }
.ab-media--tall { aspect-ratio: 3 / 4; }
.ab-media--square { aspect-ratio: 1 / 1; }

.ab-media__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  background-color: rgba(8, 33, 29, 0.78);
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--ab-mist);
}

.ab-kv {
  margin: 0;
  display: grid;
  gap: 10px;
}

.ab-kv__row {
  display: grid;
  grid-template-columns: minmax(72px, auto) 1fr;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--ab-soft);
}

.ab-kv dt {
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ab-steel);
}

.ab-kv dd {
  margin: 0;
  font-size: 15px;
  color: var(--ab-shell);
}

.ab-indexlink {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 12px;
  border-left: 2px solid transparent;
  color: var(--ab-mist);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s var(--ab-ease), border-color 0.2s var(--ab-ease);
}

.ab-indexlink:hover { color: var(--ab-shell); }

.ab-indexlink.is-active {
  color: var(--ab-lamp);
  border-left-color: var(--ab-flare);
}

.ab-indexlink__num {
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--ab-steel);
}

/* ---------- 06 页头 ---------- */
.ab-skip {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 300;
  padding: 12px 18px;
  background-color: var(--ab-lamp);
  color: var(--ab-ink);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: top 0.18s var(--ab-ease);
}

.ab-skip:focus { top: 12px; }

.ab-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background-image: linear-gradient(180deg, rgba(11, 43, 38, 0.98), rgba(11, 43, 38, 0.92));
  border-bottom: 1px solid var(--ab-soft);
  backdrop-filter: blur(6px);
}

.ab-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, rgba(201, 214, 218, 0.09) 1px, transparent 1px);
  background-size: calc(100% / 12) 100%;
  opacity: 0.6;
}

.ab-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background-color: rgba(232, 215, 185, 0.14);
  overflow: hidden;
  z-index: 2;
}

.ab-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background-image: linear-gradient(90deg, var(--ab-flare), var(--ab-lamp));
  transition: width 0.12s linear;
}

.ab-header__inner {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(12px, 2vw, 36px);
  min-height: 78px;
  padding-top: 14px;
  padding-bottom: 14px;
  transition: min-height 0.22s var(--ab-ease), padding 0.22s var(--ab-ease);
}

.ab-header[data-scrolled] .ab-header__inner {
  min-height: 60px;
  padding-top: 7px;
  padding-bottom: 7px;
}

.ab-brand {
  display: inline-flex;
  align-items: baseline;
  gap: 14px;
  text-decoration: none;
  color: var(--ab-shell);
  flex: none;
}

.ab-brand__mark {
  position: relative;
  padding-left: 14px;
  font-family: var(--ab-font-display);
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.1;
  white-space: nowrap;
  transition: font-size 0.22s var(--ab-ease);
}

.ab-brand__mark::before {
  content: "";
  position: absolute;
  left: 0;
  top: 3px;
  bottom: 3px;
  width: 4px;
  background-color: var(--ab-flare);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 0 100%);
}

.ab-header[data-scrolled] .ab-brand__mark { font-size: 18px; }

.ab-brand__meta {
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ab-steel);
  white-space: nowrap;
}

.ab-brand--footer .ab-brand__mark { font-size: 19px; }
.ab-brand--footer .ab-brand__meta { color: var(--ab-steel); }

.ab-navtoggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  background-color: transparent;
  border: 1px solid var(--ab-soft-2);
  border-radius: 0;
  color: var(--ab-sand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  cursor: pointer;
  transition: border-color 0.2s var(--ab-ease), color 0.2s var(--ab-ease);
}

.ab-navtoggle:hover { border-color: var(--ab-flare); color: var(--ab-lamp); }

.ab-navtoggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background-color: currentColor;
  transition: background-color 0.2s var(--ab-ease);
}

.ab-navtoggle__bars::before,
.ab-navtoggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background-color: currentColor;
  transition: transform 0.2s var(--ab-ease);
}

.ab-navtoggle__bars::before { top: -6px; }
.ab-navtoggle__bars::after { top: 6px; }

.ab-header[data-open] .ab-navtoggle__bars { background-color: transparent; }
.ab-header[data-open] .ab-navtoggle__bars::before { transform: translateY(6px) rotate(45deg); }
.ab-header[data-open] .ab-navtoggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

.ab-navtoggle__text { line-height: 1; }

.ab-nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 30px);
  margin-left: auto;
}

.ab-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(6px, 1.5vw, 24px);
  list-style: none;
  margin: 0;
  padding: 0;
}

.ab-nav__item { margin: 0; }

.ab-nav__link {
  position: relative;
  display: inline-flex;
  align-items: flex-start;
  gap: 5px;
  padding: 9px 2px;
  color: var(--ab-sand);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.18s var(--ab-ease);
}

.ab-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background-color: var(--ab-flare);
  transition: right 0.22s var(--ab-ease);
}

.ab-nav__link:hover { color: var(--ab-shell); }
.ab-nav__link:hover::after { right: 0; }

.ab-nav__link[aria-current="page"] { color: var(--ab-lamp); }
.ab-nav__link[aria-current="page"]::after { right: 0; background-color: var(--ab-lamp); }
.ab-nav__link[aria-current="page"] .ab-nav__index { color: var(--ab-flare); }

.ab-nav__index {
  font-family: var(--ab-font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--ab-steel);
  transform: translateY(1px);
}

.ab-nav__aside {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-left: clamp(10px, 1.6vw, 22px);
  border-left: 1px solid var(--ab-soft-2);
}

.ab-nav__stamp {
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--ab-steel);
  white-space: nowrap;
}

.ab-nav__hours {
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: #A8BFB4;
  white-space: nowrap;
}

.ab-nav__cta {
  padding: 10px 18px;
  font-size: 13px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* ---------- 07 页脚 ---------- */
.ab-footer {
  position: relative;
  overflow: hidden;
  background-image: linear-gradient(180deg, #0B2B26 0%, #08211D 100%);
  border-top: 1px solid var(--ab-soft-2);
  color: var(--ab-sand);
}

.ab-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(201, 214, 218, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(201, 214, 218, 0.05) 1px, transparent 1px);
  background-size: calc(100% / 6) 64px;
  opacity: 0.7;
}

.ab-footer__trace {
  position: absolute;
  top: 0;
  left: 0;
  width: min(340px, 44%);
  height: 3px;
  background-image: linear-gradient(90deg, var(--ab-flare), rgba(240, 90, 40, 0));
  z-index: 1;
}

.ab-footer__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(40px, 6vw, 76px);
  padding-bottom: clamp(24px, 3vw, 36px);
}

.ab-footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 1.1fr) minmax(240px, 0.95fr) minmax(260px, 0.95fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}

.ab-footer__brand { min-width: 0; }

.ab-footer__intro {
  margin: 16px 0 18px;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(232, 215, 185, 0.78);
}

.ab-footer__stamp {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.ab-footer__mono {
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--ab-steel);
}

.ab-footer__cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(18px, 3vw, 40px);
}

.ab-footer__col { min-width: 0; }

.ab-footer__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--ab-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--ab-shell);
}

.ab-footer__title::after {
  content: "";
  flex: 1;
  height: 1px;
  background-image: linear-gradient(90deg, var(--ab-soft-2), transparent);
}

.ab-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.ab-footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(232, 215, 185, 0.84);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.18s var(--ab-ease), transform 0.18s var(--ab-ease);
}

.ab-footer__link::before {
  content: "";
  width: 12px;
  height: 1px;
  background-color: var(--ab-steel);
  flex: none;
  transition: width 0.2s var(--ab-ease), background-color 0.2s var(--ab-ease);
}

.ab-footer__link:hover { color: var(--ab-lamp); transform: translateX(2px); }
.ab-footer__link:hover::before { width: 18px; background-color: var(--ab-flare); }

.ab-footer__contact { min-width: 0; }

.ab-contact {
  margin: 0;
  display: grid;
  gap: 12px;
}

.ab-contact__row {
  display: grid;
  gap: 2px;
}

.ab-contact__label {
  font-family: var(--ab-font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ab-steel);
}

.ab-contact__value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ab-shell);
  word-break: break-word;
}

.ab-contact__value--num {
  font-family: var(--ab-font-mono);
  font-size: 16px;
  letter-spacing: 0.04em;
  color: var(--ab-lamp);
}

.ab-footer__cta { margin-top: 20px; }

.ab-totop {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 10px 16px;
  background-color: transparent;
  border: 1px solid var(--ab-soft-2);
  border-radius: 0;
  color: var(--ab-sand);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.2s var(--ab-ease), color 0.2s var(--ab-ease),
    background-color 0.2s var(--ab-ease);
}

.ab-totop:hover {
  border-color: var(--ab-lamp);
  color: var(--ab-lamp);
  background-color: rgba(255, 200, 87, 0.08);
}

.ab-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--ab-soft);
}

.ab-footer__legal {
  margin: 0;
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(232, 215, 185, 0.66);
}

.ab-footer__note {
  margin: 0;
  font-family: var(--ab-font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ab-steel);
}

/* ---------- 08 动效与无障碍 ---------- */
@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;
  }

  .ab-card:hover,
  .ab-footer__link:hover,
  .ab-progress__bar { transform: none; transition: none; }
}

/* ---------- 09 响应式 ---------- */
@media (min-width: 1081px) and (max-width: 1300px) {
  .ab-nav__link { font-size: 14px; }
  .ab-nav__stamp { display: none; }
}

@media (max-width: 1080px) {
  .ab-navtoggle { display: inline-flex; }

  .ab-nav {
    display: none;
    flex-basis: 100%;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 6px 0 4px;
    padding: 8px 0 4px;
    border-top: 1px solid var(--ab-soft-2);
    max-height: min(68vh, 520px);
    overflow-y: auto;
  }

  .ab-header[data-open] .ab-nav { display: flex; }

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

  .ab-nav__item { border-bottom: 1px solid rgba(232, 215, 185, 0.1); }

  .ab-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 2px;
    font-size: 16px;
  }

  .ab-nav__link::after { display: none; }

  .ab-nav__link[aria-current="page"] {
    padding-left: 10px;
    box-shadow: inset 2px 0 0 var(--ab-lamp);
  }

  .ab-nav__index { font-size: 10px; }

  .ab-nav__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 16px 0 8px;
    border-left: 0;
    border-top: 1px dashed var(--ab-soft);
  }

  .ab-nav__cta { width: 100%; padding: 13px 18px; font-size: 14px; }

  .ab-footer__top { grid-template-columns: 1fr 1fr; }
  .ab-footer__contact { grid-column: 1 / -1; }
  .ab-footer__contact .ab-totop { margin-top: 14px; }
}

@media (max-width: 680px) {
  .ab-header__inner { min-height: 64px; padding-top: 10px; padding-bottom: 10px; }
  .ab-brand__mark { font-size: 18px; letter-spacing: 0.1em; }
  .ab-header[data-scrolled] .ab-brand__mark { font-size: 16px; }

  .ab-footer__top { grid-template-columns: 1fr; }
  .ab-footer__contact { grid-column: auto; }
  .ab-footer__base { flex-direction: column; align-items: flex-start; }
  .ab-split,
  .ab-split--flip { grid-template-columns: 1fr; }
  .ab-kv__row { grid-template-columns: 1fr; gap: 2px; }
}

@media (max-width: 560px) {
  .ab-brand__meta { display: none; }
  .ab-brand { gap: 0; }
  .ab-footer__cols { grid-template-columns: 1fr; }
  .ab-navtoggle__text { display: none; }
  .ab-navtoggle { padding: 10px 12px; }
}

@media (max-width: 380px) {
  .ab-footer__list { gap: 7px; }
  .ab-contact__value { font-size: 13px; }
}