/* =========================================================
   /assets/site.css — 澳州幸运10中心 共享外壳
   设计语言：索引卡 + 时间轴 / 深海蓝 · 极光青 · 暖金 · 珊瑚橙
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --az-deep: #0B2239;
  --az-trench: #123A5A;
  --az-cyan: #4FD1C5;
  --az-mist: #A7F3EA;
  --az-gold: #D9A441;
  --az-coral: #E07A5F;
  --az-paper: #F7F4EE;
  --az-fog: #DDE3E8;
  --az-ink: #111820;
  --az-slate: #6B7C8F;
  --az-white: #FFFFFF;

  --az-line: rgba(11, 34, 57, 0.14);
  --az-line-strong: rgba(11, 34, 57, 0.3);
  --az-on-dark: rgba(247, 244, 238, 0.8);
  --az-on-dark-soft: rgba(247, 244, 238, 0.56);
  --az-dark-line: rgba(247, 244, 238, 0.16);

  --az-radius: 3px;
  --az-radius-lg: 6px;
  --az-gutter: clamp(18px, 4.2vw, 56px);
  --az-max: 1280px;

  --az-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  --az-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", Georgia,
    "Times New Roman", serif;
  --az-mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono",
    "Courier New", monospace;

  --az-ease: cubic-bezier(0.22, 0.72, 0.28, 1);
  --az-shadow: 0 14px 32px -24px rgba(11, 34, 57, 0.55);

  --az-z-progress: 130;
  --az-z-skip: 200;
}

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

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

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd, details, summary {
  margin: 0;
}

ul, ol {
  padding: 0;
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

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

summary { display: block; }

::selection {
  background: var(--az-mist);
  color: var(--az-deep);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--az-paper);
  background-image:
    linear-gradient(to right, rgba(11, 34, 57, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(11, 34, 57, 0.045) 1px, transparent 1px);
  background-size: 88px 88px;
  background-position: center top;
  color: var(--az-ink);
  font-family: var(--az-sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--az-deep);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

strong { font-weight: 700; color: var(--az-deep); }

:where(a, button, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--az-coral);
  outline-offset: 3px;
  border-radius: 2px;
}

.az-footer :where(a, button, summary):focus-visible {
  outline-color: var(--az-cyan);
  outline-offset: 4px;
}

.az-visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.az-skip {
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--az-z-skip);
  transform: translateY(-130%);
  padding: 12px 20px;
  background: var(--az-deep);
  color: var(--az-paper);
  border-bottom: 3px solid var(--az-coral);
  font-family: var(--az-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: transform 0.16s var(--az-ease);
}

.az-skip:focus,
.az-skip:focus-visible {
  transform: translateY(0);
  outline-color: var(--az-cyan);
}

/* ---------- 4. 布局骨架 ---------- */
.az-container {
  width: 100%;
  max-width: var(--az-max);
  margin-inline: auto;
  padding-inline: var(--az-gutter);
}

.az-main {
  display: block;
  padding-block: clamp(24px, 4vw, 48px) 0;
}

.az-section { padding-block: clamp(26px, 4.6vw, 52px); }

.az-section + .az-section {
  border-top: 1px solid var(--az-line);
}

.az-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 32px);
}

.az-span-3 { grid-column: span 3; }
.az-span-4 { grid-column: span 4; }
.az-span-5 { grid-column: span 5; }
.az-span-6 { grid-column: span 6; }
.az-span-7 { grid-column: span 7; }
.az-span-8 { grid-column: span 8; }
.az-span-9 { grid-column: span 9; }
.az-span-12 { grid-column: span 12; }

/* ---------- 5. 排版工具 ---------- */
.az-display {
  font-size: clamp(44px, 7.4vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--az-deep);
}

.az-h2 {
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.az-h3 {
  font-size: clamp(19px, 2vw, 25px);
  line-height: 1.25;
}

.az-lede {
  max-width: 62ch;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.72;
  color: var(--az-trench);
}

.az-text {
  max-width: 66ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--az-ink);
}

.az-mono {
  font-family: var(--az-mono);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.az-label {
  font-family: var(--az-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--az-slate);
}

.az-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--az-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--az-trench);
}

.az-kicker::before {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: var(--az-coral);
  flex: 0 0 20px;
}

.az-index-no {
  display: inline-block;
  font-family: var(--az-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--az-gold);
  font-variant-numeric: tabular-nums;
}

.az-index-no--key {
  font-size: 1.4em;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.az-link {
  color: var(--az-trench);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(79, 209, 197, 0.85);
  text-underline-offset: 3px;
  transition: color 0.16s var(--az-ease), text-decoration-color 0.16s var(--az-ease);
}

.az-link:hover {
  color: var(--az-deep);
  text-decoration-color: var(--az-coral);
}

/* ---------- 6. 按钮 ---------- */
.az-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  min-height: 44px;
  padding: 11px 22px;
  border: 1px solid var(--az-deep);
  border-radius: var(--az-radius);
  background: var(--az-deep);
  color: var(--az-paper);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: transform 0.12s var(--az-ease), background-color 0.18s var(--az-ease),
    border-color 0.18s var(--az-ease), color 0.18s var(--az-ease);
}

.az-btn:hover {
  background: var(--az-trench);
  border-color: var(--az-trench);
  transform: translateY(-1px);
}

.az-btn--coral {
  background: var(--az-coral);
  border-color: var(--az-coral);
  color: var(--az-ink);
}

.az-btn--coral:hover {
  background: #d4694d;
  border-color: #d4694d;
  color: var(--az-ink);
}

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

.az-btn--ghost:hover {
  background: var(--az-mist);
  border-color: rgba(79, 209, 197, 0.7);
  color: var(--az-deep);
}

.az-btn--quiet {
  background: transparent;
  color: var(--az-trench);
  border-color: transparent;
  padding-inline: 6px;
}

.az-btn--quiet:hover {
  background: transparent;
  color: var(--az-deep);
  border-color: transparent;
  text-decoration: underline;
  text-decoration-color: var(--az-coral);
  text-underline-offset: 4px;
}

.az-copybtn {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 10px;
  border: 1px solid rgba(79, 209, 197, 0.55);
  border-radius: 999px;
  background: rgba(79, 209, 197, 0.08);
  color: var(--az-cyan);
  font-family: var(--az-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  transition: background-color 0.16s var(--az-ease), color 0.16s var(--az-ease),
    border-color 0.16s var(--az-ease);
}

.az-copybtn:hover {
  background: var(--az-cyan);
  border-color: var(--az-cyan);
  color: var(--az-deep);
}

.az-copybtn[data-copied="true"] {
  background: var(--az-gold);
  border-color: var(--az-gold);
  color: var(--az-ink);
}

/* ---------- 7. 面包屑 ---------- */
.az-crumbs {
  margin-bottom: clamp(18px, 3vw, 30px);
  font-family: var(--az-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--az-slate);
}

.az-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.az-crumbs__list a {
  color: var(--az-trench);
  border-bottom: 1px solid rgba(18, 58, 90, 0.25);
  transition: color 0.16s var(--az-ease), border-color 0.16s var(--az-ease);
}

.az-crumbs__list a:hover {
  color: var(--az-deep);
  border-bottom-color: var(--az-coral);
}

.az-crumbs__sep {
  color: rgba(107, 124, 143, 0.7);
}

.az-crumbs__current {
  color: var(--az-ink);
}

/* ---------- 8. 卡片 / 面板 / 注释 / 标签 ---------- */
.az-card {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--az-white);
  border: 1px solid var(--az-line);
  border-radius: var(--az-radius-lg);
  box-shadow: 0 1px 0 rgba(11, 34, 57, 0.02);
  transition: transform 0.12s var(--az-ease), border-color 0.18s var(--az-ease),
    box-shadow 0.18s var(--az-ease);
}

.az-card:hover {
  transform: translateY(-2px);
  border-color: rgba(79, 209, 197, 0.8);
  box-shadow: var(--az-shadow);
}

.az-card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.az-card__title {
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 800;
  color: var(--az-deep);
}

.az-card__meta {
  font-family: var(--az-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--az-slate);
  white-space: nowrap;
}

.az-card__list {
  display: grid;
  gap: 6px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--az-trench);
}

.az-card__list li {
  position: relative;
  padding-left: 16px;
}

.az-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 1px;
  background: var(--az-cyan);
}

.az-panel {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--az-white);
  border: 1px solid var(--az-line);
  border-radius: var(--az-radius-lg);
}

.az-note {
  padding: 2px 0 2px 16px;
  border-left: 2px solid var(--az-cyan);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--az-trench);
}

.az-note__title {
  display: block;
  margin-bottom: 6px;
  font-family: var(--az-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--az-slate);
}

.az-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid rgba(79, 209, 197, 0.6);
  border-radius: 999px;
  background: var(--az-mist);
  color: var(--az-deep);
  font-family: var(--az-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
}

/* ---------- 9. 图片容器基础规则 ---------- */
.az-figure { margin: 0; }

.az-media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(11, 34, 57, 0.12);
  border-radius: var(--az-radius-lg);
  background-color: var(--az-deep);
  background-image:
    radial-gradient(120% 120% at 12% 8%, rgba(79, 209, 197, 0.34), transparent 58%),
    radial-gradient(90% 90% at 88% 92%, rgba(18, 58, 90, 0.9), transparent 70%),
    linear-gradient(158deg, #0B2239 0%, #123A5A 62%, #0B2239 100%);
}

.az-media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0.5;
  background-image: radial-gradient(rgba(255, 255, 255, 0.22) 0.5px, transparent 0.5px);
  background-size: 3px 3px;
}

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

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

.az-media__label {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 3;
  padding: 6px 10px;
  background: rgba(11, 34, 57, 0.9);
  color: var(--az-mist);
  font-family: var(--az-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  border-top-right-radius: 4px;
}

.az-figure__caption {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin-top: 8px;
  font-family: var(--az-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--az-slate);
}

/* ---------- 10. 滚动进度 ---------- */
.az-progress {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--az-z-progress);
  height: 3px;
  pointer-events: none;
  background: transparent;
}

.az-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(var(--p, 0));
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--az-cyan) 0%, var(--az-gold) 70%, var(--az-coral) 100%);
  transition: transform 0.12s linear;
}

/* ---------- 11. 显现 ---------- */
html.az-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.55s var(--az-ease), transform 0.55s var(--az-ease);
}

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

/* ---------- 12. 头部 ---------- */
.az-header {
  position: relative;
  background: var(--az-paper);
  border-bottom: 1px solid var(--az-line);
}

.az-header::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(
    90deg,
    var(--az-deep) 0 40%,
    var(--az-cyan) 40% 60%,
    var(--az-gold) 60% 78%,
    var(--az-coral) 78% 100%
  );
}

.az-header__inner { position: relative; }

.az-header__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  padding-block: 16px 12px;
}

.az-header__meta {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: 0.16em;
  color: var(--az-slate);
}

.az-header__meta .az-mono {
  font-size: 11px;
  color: var(--az-trench);
}

.az-header__meta-note {
  display: block;
  font-family: var(--az-sans);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--az-slate);
}

.az-masthead {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  justify-self: center;
  padding: 2px 4px;
  border-radius: var(--az-radius);
}

.az-masthead__mark {
  display: grid;
  place-items: center;
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  background: var(--az-deep);
  color: var(--az-cyan);
  border-radius: 2px;
  box-shadow: inset 0 -3px 0 var(--az-gold);
  font-family: var(--az-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background-color 0.18s var(--az-ease);
}

.az-masthead__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.az-masthead__name {
  font-family: var(--az-sans);
  font-size: clamp(19px, 2.1vw, 28px);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--az-deep);
  transition: color 0.18s var(--az-ease);
}

.az-masthead__sub {
  margin-top: 4px;
  font-family: var(--az-serif);
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--az-slate);
}

.az-masthead:hover .az-masthead__name { color: var(--az-trench); }
.az-masthead:hover .az-masthead__mark { background: var(--az-trench); }

.az-header__actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  min-width: 0;
}

.az-header__cta {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 14px;
  border: 1px solid rgba(224, 122, 95, 0.75);
  border-radius: 999px;
  background: rgba(224, 122, 95, 0.1);
  color: var(--az-deep);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
  transition: background-color 0.18s var(--az-ease), color 0.18s var(--az-ease),
    border-color 0.18s var(--az-ease);
}

.az-header__cta:hover {
  background: var(--az-coral);
  border-color: var(--az-coral);
  color: var(--az-ink);
}

.az-navtoggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--az-line);
  border-radius: 999px;
  background: var(--az-white);
  color: var(--az-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  white-space: nowrap;
  transition: background-color 0.18s var(--az-ease), border-color 0.18s var(--az-ease);
}

.az-navtoggle:hover {
  background: var(--az-mist);
  border-color: rgba(79, 209, 197, 0.7);
}

.az-navtoggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  flex: 0 0 16px;
}

.az-navtoggle__bars span {
  display: block;
  height: 1.5px;
  background: var(--az-deep);
  transition: transform 0.18s var(--az-ease);
}

.az-navtoggle__label { line-height: 1; }

.az-nav {
  overflow-x: auto;
  overflow-y: hidden;
  padding-top: 10px;
  border-top: 1px solid rgba(11, 34, 57, 0.12);
  text-align: center;
  scrollbar-width: none;
}

.az-nav::-webkit-scrollbar { display: none; }

.az-nav__list {
  display: inline-flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 6px;
  padding: 2px 2px 12px;
  vertical-align: top;
  text-align: left;
}

.az-nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--az-trench);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: background-color 0.16s var(--az-ease), color 0.16s var(--az-ease),
    border-color 0.16s var(--az-ease), box-shadow 0.16s var(--az-ease);
}

.az-nav__link:hover {
  background: var(--az-mist);
  border-color: rgba(79, 209, 197, 0.5);
  color: var(--az-deep);
}

.az-nav__link[aria-current="page"] {
  background: var(--az-mist);
  border-color: rgba(79, 209, 197, 0.55);
  color: var(--az-deep);
  box-shadow: inset 0 -2px 0 0 var(--az-coral);
}

/* 移动端：展开为完整索引流 */
.az-header[data-open] .az-nav {
  overflow: visible;
}

.az-header[data-open] .az-nav__list {
  display: flex;
  flex-wrap: wrap;
  width: 100%;
  justify-content: flex-start;
}

.az-header[data-open] .az-nav__link {
  background: var(--az-white);
  border-color: var(--az-line);
}

.az-header[data-open] .az-nav__link[aria-current="page"] {
  background: var(--az-mist);
  border-color: rgba(79, 209, 197, 0.55);
  box-shadow: inset 0 -2px 0 0 var(--az-coral);
}

.az-header[data-open] .az-navtoggle__bars span:first-child {
  transform: translateY(2.75px) rotate(45deg);
}

.az-header[data-open] .az-navtoggle__bars span:last-child {
  transform: translateY(-2.75px) rotate(-45deg);
}

/* ---------- 13. 页脚 ---------- */
.az-footer {
  position: relative;
  isolation: isolate;
  margin-top: clamp(48px, 8vw, 96px);
  background: var(--az-deep);
  color: var(--az-on-dark);
}

.az-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--az-cyan) 0%, var(--az-gold) 60%, var(--az-coral) 100%);
  opacity: 0.9;
}

.az-footer__inner {
  padding-block: clamp(34px, 5.6vw, 64px) 24px;
}

.az-footer__top {
  display: grid;
  grid-template-columns: minmax(240px, 4fr) 8fr;
  align-items: start;
  gap: clamp(24px, 4vw, 56px);
}

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

.az-footer__logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--az-paper);
  line-height: 1.3;
}

.az-footer__tagline {
  max-width: 34ch;
  margin-top: 10px;
  font-family: var(--az-serif);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 244, 238, 0.72);
}

.az-footer__code {
  margin-top: 14px;
  font-family: var(--az-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--az-cyan);
}

.az-footer__tree {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px 28px;
  min-width: 0;
}

.az-tree {
  min-width: 0;
  padding-top: 12px;
  border-top: 1px solid var(--az-dark-line);
}

.az-tree__summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  list-style: none;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--az-paper);
  transition: color 0.16s var(--az-ease);
}

.az-tree__summary::-webkit-details-marker { display: none; }

.az-tree__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--az-mono);
  font-size: 13px;
  color: var(--az-cyan);
  line-height: 1;
}

.az-tree[open] > .az-tree__summary::after { content: "–"; }

.az-tree__summary:hover { color: var(--az-cyan); }

.az-tree__no {
  font-family: var(--az-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--az-gold);
}

.az-tree__list {
  display: grid;
  gap: 2px;
  margin-top: 10px;
}

.az-tree__link {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(247, 244, 238, 0.74);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--az-ease), border-color 0.16s var(--az-ease);
}

.az-tree__link:hover {
  color: var(--az-cyan);
  border-bottom-color: rgba(79, 209, 197, 0.5);
}

.az-tree__link[aria-current="page"] {
  color: var(--az-mist);
  border-bottom-color: var(--az-coral);
}

.az-footer__contact {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  overflow: hidden;
  border: 1px solid var(--az-dark-line);
  border-radius: var(--az-radius-lg);
  background: var(--az-dark-line);
}

.az-footer__contactcard {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 18px 20px;
  background: var(--az-trench);
}

.az-footer .az-label { color: var(--az-cyan); }

.az-footer__value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--az-paper);
  overflow-wrap: anywhere;
}

.az-footer__value--mono {
  font-family: var(--az-mono);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  font-weight: 400;
}

.az-footer__note {
  max-width: 68ch;
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--az-on-dark-soft);
}

.az-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: 18px;
  border-top: 1px solid var(--az-dark-line);
  font-family: var(--az-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--az-on-dark-soft);
}

.az-footer__copy,
.az-footer__icp { line-height: 1.6; }

.az-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.az-footer__legal a {
  color: rgba(247, 244, 238, 0.74);
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--az-ease), border-color 0.16s var(--az-ease);
}

.az-footer__legal a:hover {
  color: var(--az-cyan);
  border-bottom-color: rgba(79, 209, 197, 0.5);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1100px) {
  .az-span-3 { grid-column: span 4; }
  .az-span-9 { grid-column: span 8; }
}

@media (max-width: 900px) {
  .az-header__grid {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding-block: 12px 8px;
  }

  .az-header__meta { display: none; }

  .az-masthead { justify-self: start; }

  .az-masthead__sub { letter-spacing: 0.18em; }

  .az-navtoggle { display: inline-flex; }

  .az-nav {
    padding-top: 0;
    border-top: 0;
    text-align: left;
  }

  .az-nav__list {
    display: flex;
    width: 100%;
    justify-content: flex-start;
    padding-bottom: 12px;
  }

  .az-span-5,
  .az-span-6 { grid-column: span 12; }

  .az-span-4 { grid-column: span 6; }
  .az-span-7,
  .az-span-8,
  .az-span-9 { grid-column: span 12; }

  .az-footer__top {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

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

  .az-footer__contactcard:last-child { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .az-span-3,
  .az-span-4 { grid-column: span 12; }

  .az-footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .az-footer__legal { gap: 14px; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }

  .az-masthead__mark {
    flex-basis: 34px;
    width: 34px;
    height: 34px;
    font-size: 12.5px;
  }

  .az-masthead__name { font-size: 17px; }

  .az-masthead__sub { display: none; }

  .az-header__cta {
    padding: 7px 10px;
    font-size: 11.5px;
    letter-spacing: 0.04em;
    min-height: 34px;
  }

  .az-navtoggle {
    padding: 8px 10px;
    min-height: 34px;
  }

  .az-navtoggle__label { display: none; }

  .az-header[data-open] .az-navtoggle__label { display: none; }

  .az-nav__link { padding: 0 13px; font-size: 13.5px; }

  .az-footer__tree { grid-template-columns: 1fr; }

  .az-footer__contact {
    grid-template-columns: 1fr;
  }

  .az-footer__contactcard:last-child { grid-column: auto; }
}

/* ---------- 15. 打印与动效偏好 ---------- */
@media print {
  .az-skip,
  .az-progress,
  .az-navtoggle,
  .az-header__cta { display: none; }

  .az-header::before { display: none; }

  .az-nav { overflow: visible; }

  body { background-image: none; }
}

@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;
  }

  .az-progress__bar { transition: none; }

  .az-btn:hover,
  .az-card:hover { transform: none; }

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