/* =========================================================
   幸运澳洲服务 · 共享样式 /assets/site.css
   概念：南十字星手账 —— 胶囊书脊 + Bento 专题板 + 印刷描边
   ========================================================= */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 8rem;
}
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 品牌色 */
  --ochre: #A8432B;
  --ochre-deep: #8A3622;
  --deep: #0B3550;
  --deep-2: #082A40;
  --clover: #7FAF3A;
  --flag: #F4B41A;
  --verm: #D6532F;
  --paper: #F8F1E5;
  --paper-2: #FDF8EF;
  --sand: #E8D3B9;
  --ink: #17242B;
  --mist: #D9E8F0;
  --white: #FFFFFF;

  /* 派生 */
  --ink-70: rgba(23, 36, 43, .72);
  --ink-50: rgba(23, 36, 43, .52);
  --line: rgba(23, 36, 43, .18);
  --line-strong: rgba(23, 36, 43, .32);
  --paper-line: rgba(248, 241, 229, .28);
  --paper-line-strong: rgba(248, 241, 229, .62);
  --paper-70: rgba(248, 241, 229, .74);
  --paper-55: rgba(248, 241, 229, .58);

  /* 字体 */
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "DIN Alternate", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  /* 字号层级 12/14/16/18/24/32/48/72/96 */
  --step-00: 0.75rem;
  --step--1: 0.875rem;
  --step-0: 1rem;
  --step-1: 1.125rem;
  --step-2: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
  --step-3: clamp(1.5rem, 1.3rem + 1vw, 2rem);
  --step-4: clamp(1.9rem, 1.5rem + 2vw, 3rem);
  --step-5: clamp(2.3rem, 1.7rem + 3.2vw, 3.6rem);
  --step-6: clamp(2.6rem, 1.8rem + 4.4vw, 5.2rem);

  /* 形状 */
  --radius-s: 6px;
  --radius-m: 14px;
  --radius-l: 26px;
  --radius-pill: 999px;
  --radius-sticker: 24px 6px 24px 6px;

  /* 描边与阴影（印刷感） */
  --border-ink: 2px solid var(--ink);
  --shadow-print: 6px 6px 0 rgba(23, 36, 43, .16);
  --shadow-lift: 0 14px 30px -12px rgba(11, 53, 80, .45);

  /* 节奏 */
  --wrap: 1160px;
  --gap: clamp(1rem, 0.6rem + 1.4vw, 1.75rem);
  --pad-x: clamp(1rem, 0.6rem + 2.4vw, 3rem);
  --section-y: clamp(2.5rem, 1.8rem + 3vw, 4.5rem);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 基础排版 ---------- */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 88% -4%, rgba(244, 180, 26, .20), transparent 42%),
    radial-gradient(circle at 2% 3%, rgba(127, 175, 58, .14), transparent 38%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-wrap: balance;
}
h1 { font-size: var(--step-6); }
h2 { font-size: var(--step-4); }
h3 { font-size: var(--step-3); }
h4 { font-size: var(--step-2); }

strong, b { font-weight: 700; }
small { font-size: var(--step--1); }

::selection {
  background: var(--clover);
  color: var(--ink);
}

:focus-visible {
  outline: 3px solid var(--clover);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

/* ---------- 4. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: .6rem;
  left: .6rem;
  z-index: 300;
  padding: .6rem 1rem;
  font-size: var(--step--1);
  font-weight: 700;
  color: var(--paper);
  background: var(--ink);
  border-radius: var(--radius-pill);
  transform: translateY(-160%);
  transition: transform .2s var(--ease);
}
.skip-link:focus {
  transform: translateY(0);
}

/* ---------- 5. 悬浮胶囊头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: .7rem var(--pad-x) 0;
  transition: padding .28s var(--ease);
}

.header-shell {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas: "brand nav utility";
  align-items: center;
  gap: .4rem clamp(.5rem, 1vw, 1.1rem);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: .42rem .5rem .42rem .58rem;
  color: var(--white);
  background: linear-gradient(100deg, var(--deep) 0%, var(--deep) 58%, #0d3f5e 100%);
  border: 2px solid var(--ink);
  border-radius: var(--radius-pill);
  box-shadow:
    inset 0 -3px 0 rgba(127, 175, 58, .45),
    0 8px 0 -3px rgba(23, 36, 43, .16);
  transition: box-shadow .28s var(--ease), border-radius .28s var(--ease);
}

.site-header[data-scrolled] .header-shell {
  box-shadow:
    inset 0 -3px 0 rgba(127, 175, 58, .62),
    0 16px 26px -14px rgba(11, 53, 80, .7);
}

/* 品牌岛 */
.brand-lockup {
  grid-area: brand;
  display: flex;
  align-items: center;
  gap: .58rem;
  padding: .18rem .4rem .18rem .12rem;
  border-radius: var(--radius-pill);
  color: var(--white);
}
.brand-mark {
  flex: none;
  width: 34px;
  height: 34px;
  border: 2px solid var(--ink);
  border-radius: 10px;
  background: conic-gradient(from 200deg, var(--ochre) 0 28%, var(--flag) 0 52%, var(--clover) 0 76%, var(--mist) 0 100%);
  box-shadow: 2px 2px 0 rgba(0, 0, 0, .32);
  transform: rotate(-8deg);
  transition: transform .3s var(--ease);
}
.brand-lockup:hover .brand-mark,
.brand-lockup:focus-visible .brand-mark { transform: rotate(6deg) scale(1.05); }

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.02rem;
  letter-spacing: -0.02em;
  color: var(--white);
}
.brand-sub {
  font-size: .64rem;
  font-weight: 500;
  letter-spacing: .16em;
  color: rgba(255, 255, 255, .68);
}

/* 移动菜单按钮 */
.nav-toggle {
  grid-area: toggle;
  display: none;
  align-items: center;
  gap: .45rem;
  padding: .42rem .72rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, .45);
  border-radius: var(--radius-pill);
  transition: border-color .2s, background .2s;
}
.nav-toggle:hover { border-color: var(--flag); background: rgba(255, 255, 255, .1); }
.nav-toggle-bars {
  display: grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle-bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle-text { line-height: 1; }
.site-header[data-open] .nav-toggle {
  border-color: var(--flag);
  color: var(--flag);
}
.site-header[data-open] .nav-toggle-bars span:nth-child(1) { transform: translateY(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(-5px) rotate(-45deg); }

/* 导航岛 */
.site-nav { grid-area: nav; min-width: 0; }
.nav-list {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: .08rem;
  padding: .12rem 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.nav-list::-webkit-scrollbar { display: none; }

.nav-item { flex: none; }

.nav-link {
  position: relative;
  display: block;
  padding: .42rem .7rem;
  font-size: .9rem;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  color: rgba(255, 255, 255, .85);
  border-radius: var(--radius-pill);
  transition: color .2s var(--ease), background .2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: .7rem;
  right: .7rem;
  bottom: .18rem;
  height: 2px;
  border-radius: 2px;
  background: var(--clover);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .26s var(--ease);
}
.nav-link:hover {
  color: var(--white);
  background: rgba(255, 255, 255, .1);
}
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

.nav-link[aria-current="page"] {
  color: var(--ink);
  background: var(--paper);
  box-shadow: inset 0 0 0 2px var(--ink);
}
.nav-link[aria-current="page"]::after {
  background: var(--ochre);
  transform: scaleX(1);
  bottom: .14rem;
}

/* 工具岛 */
.header-utility {
  grid-area: utility;
  display: flex;
  align-items: center;
  gap: .4rem;
}
.lang-switch {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border: 1.5px solid rgba(255, 255, 255, .34);
  border-radius: var(--radius-pill);
}
.lang-chip {
  padding: .2rem .5rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1.4;
  color: rgba(255, 255, 255, .7);
  border-radius: var(--radius-pill);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.lang-chip:hover { color: var(--white); background: rgba(255, 255, 255, .12); }
.lang-chip[aria-pressed="true"] {
  color: var(--ink);
  background: var(--flag);
}

.copy-chip {
  padding: .3rem .62rem;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .02em;
  line-height: 1.5;
  color: rgba(255, 255, 255, .82);
  border: 1.5px dashed rgba(255, 255, 255, .34);
  border-radius: var(--radius-pill);
  transition: color .2s, border-color .2s, background .2s;
}
.copy-chip:hover {
  color: var(--white);
  border-color: var(--clover);
  background: rgba(127, 175, 58, .18);
}

.copy-status {
  position: absolute;
  left: 50%;
  top: calc(100% + .5rem);
  z-index: 5;
  padding: .34rem .8rem;
  font-size: .75rem;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
  color: var(--paper);
  background: var(--ink);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 18px -10px rgba(11, 53, 80, .8);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate(-50%, -6px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}
.copy-status.is-active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .58rem 1.05rem;
  font-size: .9rem;
  font-weight: 700;
  line-height: 1.25;
  text-align: center;
  border: 2px solid var(--ink);
  border-radius: var(--radius-pill);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease), color .18s var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn-cta {
  color: var(--white);
  background: var(--ochre);
  box-shadow: 3px 3px 0 rgba(23, 36, 43, .38);
}
.btn-cta:hover,
.btn-cta:focus-visible {
  background: var(--verm);
  box-shadow: 5px 5px 0 rgba(23, 36, 43, .38);
  transform: translate(-1px, -1px);
}

.btn-line {
  color: var(--ink);
  background: transparent;
  box-shadow: 3px 3px 0 rgba(23, 36, 43, .16);
}
.btn-line:hover,
.btn-line:focus-visible {
  color: var(--paper);
  background: var(--ink);
  box-shadow: 5px 5px 0 rgba(23, 36, 43, .16);
  transform: translate(-1px, -1px);
}

.btn-ghost {
  color: var(--paper);
  background: transparent;
  border-color: var(--paper-line-strong);
}
.btn-ghost:hover,
.btn-ghost:focus-visible {
  color: var(--ink);
  background: var(--flag);
  border-color: var(--ink);
}
.btn:focus-visible { outline: 3px solid var(--flag); outline-offset: 3px; }

/* ---------- 7. 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}
.board { padding-block: var(--section-y); }

/* ---------- 8. 眉题 / 标签 / 术语 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-size: var(--step-00);
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ochre);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 3px;
  border-radius: 2px;
  background: var(--clover);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .14rem .55rem;
  font-size: var(--step-00);
  font-weight: 700;
  letter-spacing: .04em;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--ink);
  border-radius: var(--radius-pill);
}
.tag-flag { background: var(--flag); }
.tag-clover { background: var(--clover); }
.tag-ochre { color: var(--white); background: var(--ochre); border-color: var(--ochre-deep); }

.term-chip {
  display: inline-flex;
  align-items: baseline;
  padding: .05rem .35rem;
  font-size: .92em;
  font-weight: 700;
  color: var(--ink);
  background: rgba(127, 175, 58, .16);
  border-bottom: 2px solid var(--clover);
  border-radius: 3px 3px 0 0;
}

/* ---------- 9. Bento 网格与卡片 ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.bento-card {
  position: relative;
  grid-column: span 4;
  padding: clamp(1rem, .72rem + 1vw, 1.65rem);
  background: var(--paper-2);
  border: var(--border-ink);
  border-radius: var(--radius-sticker);
  box-shadow: var(--shadow-print);
  transition: transform .24s var(--ease), box-shadow .24s var(--ease);
}
.bento-card:hover {
  transform: translate(-2px, -3px);
  box-shadow: 9px 10px 0 rgba(23, 36, 43, .16);
}
.bento-card--focus {
  grid-column: span 8;
  color: var(--white);
  background: var(--ochre);
}
.bento-card--focus h2,
.bento-card--focus h3 { color: var(--white); }
.bento-card--sand { background: var(--sand); }
.bento-card--mist { background: var(--mist); }
.bento-card--deep {
  color: var(--paper);
  background: var(--deep);
}
.bento-card--deep h2,
.bento-card--deep h3 { color: var(--paper); }
.bento-card--wide { grid-column: span 8; }
.bento-card--full { grid-column: span 12; }

/* ---------- 10. 摘要条 / 步骤卡 / 延伸阅读 ---------- */
.summary-bar {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .3rem 1rem;
  align-items: start;
  padding: clamp(.9rem, .7rem + .6vw, 1.2rem) clamp(1rem, .8rem + 1vw, 1.5rem);
  background: linear-gradient(90deg, rgba(232, 211, 185, .8), rgba(248, 241, 229, .45));
  border-left: 6px solid var(--ochre);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}
.summary-label {
  padding-top: .18rem;
  font-size: var(--step-00);
  font-weight: 800;
  letter-spacing: .16em;
  color: var(--ochre);
}
.summary-text {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--ink);
}
.summary-text a {
  color: var(--ochre);
  border-bottom: 2px solid var(--clover);
}

.step-card {
  position: relative;
  padding: 1.05rem 1.2rem 1.05rem 3.1rem;
  background: var(--white);
  border: var(--border-ink);
  border-radius: var(--radius-m);
  box-shadow: 4px 4px 0 rgba(23, 36, 43, .14);
}
.step-num {
  position: absolute;
  left: 1rem;
  top: 1.05rem;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--clover);
}

.readmore-slot {
  display: grid;
  gap: .6rem;
  padding-top: 1rem;
  border-top: 2px dashed var(--line-strong);
}
.readmore-slot .tag { align-self: start; }

/* ---------- 11. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--sand);
  border: var(--border-ink);
  border-radius: var(--radius-sticker);
  box-shadow: var(--shadow-print);
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame--wash::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(200deg, rgba(168, 67, 43, .48), rgba(11, 53, 80, .18) 62%);
  mix-blend-mode: multiply;
}
.media-frame-caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: .42rem .8rem;
  font-size: var(--step-00);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ink);
  background: var(--paper);
  border-top: 2px solid var(--ink);
  border-right: 2px solid var(--ink);
  border-radius: 0 var(--radius-s) 0 0;
}

/* ---------- 12. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .3rem;
  font-size: var(--step--1);
  color: var(--ink-70);
}
.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: .3rem;
}
.breadcrumbs li + li::before {
  content: "／";
  font-weight: 700;
  color: var(--ochre);
}
.breadcrumbs a {
  color: var(--ink-70);
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}
.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--ochre);
  border-bottom-color: var(--clover);
}
.breadcrumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 13. 长文 ---------- */
.prose {
  max-width: 68ch;
  font-size: var(--step-1);
  line-height: 1.75;
}
.prose > * + * { margin-top: 1.1em; }
.prose p { max-width: 68ch; }
.prose h2 { font-size: var(--step-3); margin-top: 1.8em; }
.prose h3 { font-size: var(--step-2); margin-top: 1.5em; }
.prose a {
  color: var(--ochre);
  border-bottom: 2px solid var(--clover);
  transition: background .2s;
}
.prose a:hover { background: rgba(127, 175, 58, .18); }
.prose strong { color: var(--ink); }
.prose ul,
.prose ol {
  display: grid;
  gap: .45rem;
  padding-left: 1.25rem;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li::marker { color: var(--ochre); font-weight: 700; }
.prose blockquote {
  max-width: 60ch;
  padding: .8rem 1.1rem;
  color: var(--ink);
  background: rgba(232, 211, 185, .5);
  border-left: 6px solid var(--clover);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

/* ---------- 14. 可见性工具 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------- 15. 滚动显现 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity .52s var(--ease),
    transform .52s var(--ease);
  transition-delay: calc(var(--reveal-delay, 0) * 1ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 16. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 2rem + 5vw, 6rem);
  overflow: hidden;
  color: var(--paper);
  background: linear-gradient(175deg, var(--deep) 0%, var(--deep-2) 100%);
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 90% -6%, rgba(244, 180, 26, .18), transparent 44%),
    radial-gradient(circle at 3% 96%, rgba(168, 67, 43, .38), transparent 46%);
}
.footer-flagline {
  height: 8px;
  background: linear-gradient(90deg,
    var(--ochre) 0 22%,
    var(--flag) 0 42%,
    var(--clover) 0 58%,
    var(--mist) 0 74%,
    var(--verm) 0 100%);
}
.footer-shell {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(2rem, 1.4rem + 3vw, 3.5rem) var(--pad-x) clamp(1.4rem, 1rem + 2vw, 2rem);
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2.4fr);
  gap: clamp(1.5rem, 1rem + 2.5vw, 3rem);
  align-items: start;
  padding-bottom: clamp(1.6rem, 1rem + 2vw, 2.6rem);
  border-bottom: 1px solid var(--paper-line);
}
.footer-brand { min-width: 0; }
.footer-mark {
  display: block;
  width: 42px;
  height: 42px;
  margin-bottom: .9rem;
  border: 2px solid var(--paper-line-strong);
  border-radius: 12px;
  background: conic-gradient(from 140deg, var(--flag) 0 25%, var(--clover) 0 50%, var(--mist) 0 75%, var(--verm) 0 100%);
  transform: rotate(-6deg);
}
.footer-brand-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.footer-brand-sub {
  margin-top: .3rem;
  font-size: var(--step-00);
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--flag);
}
.footer-brand-text {
  max-width: 30ch;
  margin-top: .7rem;
  font-size: .88rem;
  line-height: 1.7;
  color: var(--paper-70);
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: clamp(.9rem, .6rem + 1vw, 1.6rem);
}
.footer-col { min-width: 0; }
.footer-col-title {
  display: flex;
  align-items: baseline;
  gap: .38rem;
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 800;
  letter-spacing: .02em;
  line-height: 1.4;
  color: var(--paper);
}
.footer-col-index {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--flag);
}
.footer-col-text {
  margin-top: .45rem;
  font-size: .8rem;
  line-height: 1.65;
  color: var(--paper-55);
}
.footer-link {
  display: inline-flex;
  align-items: center;
  gap: .28rem;
  padding-bottom: 1px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--paper);
  border-bottom: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.footer-col .footer-link { margin-top: .55rem; }
.footer-col .footer-link::after {
  content: "→";
  font-size: .85em;
  color: var(--clover);
  transition: transform .2s var(--ease);
}
.footer-col .footer-link:hover::after,
.footer-col .footer-link:focus-visible::after { transform: translateX(3px); }
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--flag);
  border-bottom-color: var(--clover);
}
.footer-meta {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  gap: 1.2rem 2rem;
  align-items: start;
  padding-top: clamp(1.2rem, 1rem + 1.5vw, 2rem);
}
.footer-contact {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1.8rem;
  min-width: 0;
}
.footer-contact-line {
  display: flex;
  gap: .5rem;
  min-width: 0;
  font-size: .84rem;
  line-height: 1.7;
  color: var(--paper-70);
}
.footer-contact-label {
  flex: none;
  padding-top: .1rem;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--flag);
}
.footer-contact-value { min-width: 0; word-break: break-word; }
.footer-legal-block {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .35rem;
}
.footer-legal {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .02em;
  color: var(--paper-55);
}
.footer-icp {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .02em;
  color: var(--paper-55);
}
.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem 1rem;
  margin-top: .2rem;
}
.footer-legal-links .footer-link {
  font-size: .8rem;
  color: var(--paper-70);
}

/* ---------- 17. 响应式 ---------- */
@media (min-width: 1100px) {
  .nav-list { justify-content: center; }
}

@media (max-width: 1024px) {
  .bento-card { grid-column: span 6; }
  .bento-card--focus,
  .bento-card--wide { grid-column: span 12; }
  .bento-card--full { grid-column: span 12; }
  .footer-top { grid-template-columns: minmax(0, 1fr); }
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 960px) {
  .site-header { padding: .6rem .75rem 0; }
  .header-shell {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand toggle"
      "nav nav"
      "utility utility";
    padding: .5rem .6rem;
    border-radius: 1.4rem;
  }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none;
    padding-top: .4rem;
    margin-top: .4rem;
    border-top: 1.5px dashed rgba(255, 255, 255, .26);
  }
  .site-header[data-open] .site-nav { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: .1rem;
    padding: 0;
    overflow: visible;
  }
  .nav-link {
    padding: .58rem .8rem;
    font-size: .95rem;
    border-radius: .85rem;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] { box-shadow: inset 0 0 0 2px var(--ink); }
  .header-utility {
    display: none;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem;
    padding: .55rem .2rem .2rem;
  }
  .site-header[data-open] .header-utility { display: flex; }
  .copy-status {
    left: .9rem;
    transform: translateY(-6px);
  }
  .copy-status.is-active { transform: translateY(0); }
  .brand-name { font-size: .96rem; }
}

@media (max-width: 820px) {
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-meta { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 760px) {
  .bento-card,
  .bento-card--focus,
  .bento-card--wide,
  .bento-card--full { grid-column: span 12; }
  .media-frame { aspect-ratio: 4 / 3; }
  .media-frame--wide { aspect-ratio: 16 / 9; }
  .media-frame--tall { aspect-ratio: 3 / 4; }
  .prose { font-size: var(--step-0); }
  .summary-bar { grid-template-columns: minmax(0, 1fr); }
  .summary-label { padding-top: 0; }
}

@media (max-width: 560px) {
  .footer-nav { grid-template-columns: minmax(0, 1fr); }
  .footer-contact { flex-direction: column; gap: .3rem; }
  .nav-toggle-text { display: none; }
  .btn { padding: .52rem .9rem; font-size: .85rem; }
  .copy-status { max-width: calc(100vw - 2.4rem); white-space: normal; }
}

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