/* ==========================================================================
   水果派主页 · 共享站点样式  /assets/site.css
   色谱：果皮红 / 果肉橙 / 叶片青 / 莓红 / 金橙 / 奶油白 / 米纸灰 / 炭黑 / 深青 / 浅橙
   ========================================================================== */

/* ---------- 1. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, figcaption, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }
summary { cursor: pointer; }
summary::-webkit-details-marker { display: none; }
hr { border: 0; border-top: 1px solid var(--line); }

/* ---------- 2. 变量 ---------- */
:root {
  --peel-red: #E23E3E;
  --flesh-orange: #F28C28;
  --leaf-green: #2E7D5B;
  --berry: #B8326A;
  --gold-orange: #D97A00;
  --cream: #FFF7EC;
  --paper: #EFE7DA;
  --charcoal: #1E1B18;
  --deep-green: #123C32;
  --light-orange: #FBE0C4;

  --ink: var(--charcoal);
  --ink-soft: rgba(30, 27, 24, .70);
  --ink-faint: rgba(30, 27, 24, .46);
  --line: rgba(30, 27, 24, .14);
  --line-strong: rgba(30, 27, 24, .30);
  --accent: var(--flesh-orange);

  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --font-body: "Noto Sans SC", "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1200px;
  --gutter: clamp(18px, 4vw, 44px);
  --header-h: 74px;
  --cut: 14px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  font-family: var(--font-body);
  font-size: clamp(16px, 1.05vw, 17.5px);
  line-height: 1.75;
  letter-spacing: .012em;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: .008em;
  color: var(--ink);
}
p { text-wrap: pretty; }
a:focus-visible, button:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid var(--flesh-orange);
  outline-offset: 3px;
}

/* ---------- 4. 布局容器 ---------- */
main { display: block; padding-top: var(--header-h); }
.bleed-top { margin-top: calc(-1 * var(--header-h)); }
.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--wide { max-width: 1380px; }
.section { padding-block: clamp(46px, 7vw, 96px); }
.stack > * + * { margin-top: clamp(12px, 1.8vw, 20px); }
.grid { display: grid; gap: clamp(16px, 2.4vw, 28px); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 5. 跳转链接与轨迹条 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1200;
  padding: .7em 1.1em;
  background: var(--charcoal);
  color: var(--cream);
  font-size: .9rem;
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-260%);
  transition: transform .2s var(--ease);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
}
.skip-link:focus { transform: translateY(0); }

.trail {
  position: relative;
  width: 100%;
  height: 4px;
  overflow: hidden;
  background: linear-gradient(90deg,
    var(--peel-red) 0 26%,
    var(--flesh-orange) 26% 54%,
    var(--leaf-green) 54% 76%,
    var(--berry) 76% 90%,
    var(--gold-orange) 90% 100%);
}
.trail::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg,
    rgba(255, 247, 236, .9) 0 3px,
    transparent 3px 15px);
}
.trail--header { height: 3px; }

/* ---------- 6. 头部 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 900;
  background: rgba(255, 247, 236, .80);
  -webkit-backdrop-filter: saturate(1.5) blur(10px);
  backdrop-filter: saturate(1.5) blur(10px);
  border-bottom: 1px solid transparent;
  transition: background-color .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.site-header.is-solid {
  background: var(--cream);
  border-bottom-color: var(--line);
  box-shadow: 0 14px 30px -26px rgba(30, 27, 24, .75);
}
.header-bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(12px, 2.2vw, 30px);
  min-height: var(--header-h);
  padding-block: 8px;
}

/* 品牌 */
.brand { display: flex; flex-direction: column; gap: 3px; text-decoration: none; }
.brand__mark {
  position: relative;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: .02em;
}
.brand__mark::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 44px;
  height: 3px;
  background: linear-gradient(90deg, var(--peel-red), var(--flesh-orange));
  transform: skewX(-24deg);
}
.brand__tagline {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--ink-faint);
}

/* 导航 */
.site-nav__list { display: flex; align-items: center; gap: clamp(2px, 1vw, 14px); }
.site-nav__item:nth-child(1) { --nav-accent: var(--peel-red); }
.site-nav__item:nth-child(2) { --nav-accent: var(--gold-orange); }
.site-nav__item:nth-child(3) { --nav-accent: var(--flesh-orange); }
.site-nav__item:nth-child(4) { --nav-accent: var(--berry); }
.site-nav__item:nth-child(5) { --nav-accent: var(--leaf-green); }
.site-nav__item:nth-child(6) { --nav-accent: var(--deep-green); }
.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 12px 4px 14px;
  font-size: .95rem;
  font-weight: 500;
  white-space: nowrap;
  text-decoration: none;
  color: var(--ink-soft);
  transition: color .2s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 6px;
  height: 3px;
  background: var(--nav-accent, var(--flesh-orange));
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .26s var(--ease);
  clip-path: polygon(0 0, 100% 0, calc(100% - 5px) 100%, 0 100%);
}
.site-nav__link:hover, .site-nav__link:focus-visible { color: var(--ink); }
.site-nav__link:hover::after, .site-nav__link:focus-visible::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--ink); font-weight: 700; }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* 头部动作区 */
.header-actions { display: flex; align-items: center; gap: clamp(8px, 1.2vw, 16px); }
.header-phone {
  font-family: var(--font-mono);
  font-size: .86rem;
  letter-spacing: .05em;
  text-decoration: none;
  color: var(--ink);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line-strong);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.header-phone:hover { color: var(--peel-red); border-color: var(--peel-red); }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: .55em;
  padding: .55em .8em;
  font-size: .85rem;
  font-weight: 600;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.nav-toggle:hover { background: var(--light-orange); }
.nav-toggle__bars { position: relative; width: 18px; height: 2px; background: currentColor; transition: background-color .2s var(--ease); }
.nav-toggle__bars::before, .nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .24s var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.site-header[data-open] .nav-toggle__bars { background: transparent; }
.site-header[data-open] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1180px) { .header-phone { display: none; } }
@media (max-width: 900px) { .header-cta { display: none; } }

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: calc(var(--header-h) + 3px);
    max-height: calc(100vh - var(--header-h) - 3px);
    overflow-y: auto;
    padding: 10px var(--gutter) 22px;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 30px 44px -34px rgba(30, 27, 24, .85);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s linear;
  }
  .site-header[data-open] .site-nav { opacity: 1; visibility: visible; transform: none; }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__item { border-bottom: 1px dashed var(--line); }
  .site-nav__item:last-child { border-bottom: 0; }
  .site-nav__link { display: block; padding: 14px 0 14px 18px; font-size: 1.02rem; }
  .site-nav__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 7px;
    height: 7px;
    margin-top: -4px;
    background: var(--nav-accent, var(--flesh-orange));
    transform: rotate(45deg);
  }
  .site-nav__link::after { display: none; }
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(48px, 7vw, 96px);
  background: var(--deep-green);
  color: rgba(255, 247, 236, .86);
}
.site-footer::before {
  content: "";
  position: absolute;
  right: -110px;
  top: -60px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(242, 140, 40, .26), rgba(242, 140, 40, 0) 68%);
  pointer-events: none;
}
.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(230px, 1.35fr) 1fr 1.35fr;
  gap: clamp(26px, 4vw, 56px);
  padding-block: clamp(38px, 6vw, 74px) clamp(26px, 4vw, 44px);
}
.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.1;
  color: var(--cream);
}
.footer-brand__line {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .08em;
  color: rgba(255, 247, 236, .72);
}
.footer-brand__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: .92rem;
  color: rgba(255, 247, 236, .62);
}
.footer-col__title {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: .76rem;
  letter-spacing: .2em;
  color: rgba(255, 247, 236, .56);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 247, 236, .18);
}
.footer-links li + li { margin-top: 2px; }
.footer-links a {
  display: inline-block;
  padding: 6px 0;
  font-size: .95rem;
  text-decoration: none;
  color: rgba(255, 247, 236, .82);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
}
.footer-links a:hover, .footer-links a:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--flesh-orange);
  transform: translateX(3px);
}
.footer-contact__row {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(255, 247, 236, .16);
}
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .12em;
  color: rgba(255, 247, 236, .5);
}
.footer-contact__val {
  font-size: .92rem;
  overflow-wrap: anywhere;
  color: rgba(255, 247, 236, .9);
}
.copy-email {
  display: inline-flex;
  margin-left: 10px;
  padding: .3em .6em;
  vertical-align: middle;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .06em;
  color: rgba(255, 247, 236, .92);
  background: rgba(255, 247, 236, .08);
  box-shadow: inset 0 0 0 1px rgba(255, 247, 236, .3);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
  transition: background-color .2s var(--ease), color .2s var(--ease), box-shadow .2s var(--ease);
}
.copy-email:hover { background: var(--flesh-orange); color: #fff; box-shadow: inset 0 0 0 1px var(--flesh-orange); }
.copy-note {
  min-height: 1.3em;
  margin-top: 12px;
  font-size: .8rem;
  color: rgba(255, 247, 236, .78);
}
.footer-bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 28px;
  padding-block: 18px 26px;
  border-top: 1px solid rgba(255, 247, 236, .18);
}
.footer-icp, .footer-update, .footer-copyright {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: rgba(255, 247, 236, .62);
}
@media (max-width: 980px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
}

/* ---------- 8. 按钮 ---------- */
.btn {
  --btn-bg: var(--flesh-orange);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  padding: .7em 1.2em;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: .92rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: transform .18s var(--ease), background-color .2s var(--ease), color .2s var(--ease), box-shadow .2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--flesh { --btn-bg: var(--flesh-orange); }
.btn--peel { --btn-bg: var(--peel-red); }
.btn--leaf { --btn-bg: var(--leaf-green); }
.btn--berry { --btn-bg: var(--berry); }
.btn--gold { --btn-bg: var(--gold-orange); }
.btn--cream { --btn-bg: var(--cream); --btn-fg: var(--charcoal); }
.btn--ghost { --btn-bg: transparent; --btn-fg: var(--ink); box-shadow: inset 0 0 0 1px var(--line-strong); }
.btn--ghost:hover { background: var(--light-orange); box-shadow: inset 0 0 0 1px var(--ink); }
.btn--sm { padding: .5em .9em; font-size: .84rem; clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%); }
.btn--block { width: 100%; }

/* ---------- 9. 色彩分区 ---------- */
.band { position: relative; }
.band--paper { background: var(--paper); }
.band--flesh { background: var(--light-orange); --accent: var(--flesh-orange); }
.band--leaf { background: rgba(46, 125, 91, .11); --accent: var(--leaf-green); }
.band--berry { background: rgba(184, 50, 106, .09); --accent: var(--berry); }
.band--gold { background: rgba(217, 122, 0, .11); --accent: var(--gold-orange); }
.band--deep { background: var(--deep-green); color: rgba(255, 247, 236, .9); --accent: var(--flesh-orange); }
.band--deep h1, .band--deep h2, .band--deep h3 { color: var(--cream); }
.band--deep .lede { color: rgba(255, 247, 236, .78); }

/* ---------- 10. 章节头与文字块 ---------- */
.section__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 72ch;
  margin-bottom: clamp(24px, 3.4vw, 46px);
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .22em;
  color: var(--accent);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  background: var(--accent);
  transform: skewX(-24deg);
}
.t-display { font-size: clamp(2.6rem, 7vw, 5.6rem); line-height: 1.02; letter-spacing: -.012em; }
.t-section { font-size: clamp(1.6rem, 3.2vw, 2.5rem); }
.t-sub { font-size: clamp(1.15rem, 2vw, 1.5rem); }
.lede { max-width: 62ch; font-size: clamp(1rem, 1.4vw, 1.15rem); color: var(--ink-soft); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

/* ---------- 11. 切角面板 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: transform .22s var(--ease), background-color .22s var(--ease);
}
.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  clip-path: inherit;
  box-shadow: inset 0 0 0 1px var(--line);
  pointer-events: none;
}
.panel::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 56px;
  height: 4px;
  background: var(--accent);
}
.panel:hover { transform: translateY(-2px); }
.panel--flesh { --accent: var(--flesh-orange); background: var(--light-orange); }
.panel--leaf { --accent: var(--leaf-green); background: rgba(46, 125, 91, .1); }
.panel--berry { --accent: var(--berry); background: rgba(184, 50, 106, .09); }
.panel--gold { --accent: var(--gold-orange); background: rgba(217, 122, 0, .1); }

/* ---------- 12. 数据锚点与标签 ---------- */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.4vw, 3.3rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--accent);
}
.stat__label { font-size: .84rem; letter-spacing: .12em; color: var(--ink-faint); }
.stat--flesh { --accent: var(--flesh-orange); }
.stat--leaf { --accent: var(--leaf-green); }
.stat--berry { --accent: var(--berry); }
.stat--gold { --accent: var(--gold-orange); }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: .4em;
  padding: .35em .85em;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--paper);
  box-shadow: inset 0 0 0 1px var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background-color .2s var(--ease), color .2s var(--ease), box-shadow .2s var(--ease);
}
.chip:hover { background: var(--light-orange); color: var(--ink); }
.chip.is-active, .chip[aria-pressed="true"] {
  background: var(--accent);
  color: #fff;
  box-shadow: inset 0 0 0 1px var(--accent);
}

/* ---------- 13. 规格表与两版参数 ---------- */
.spec-table { width: 100%; font-size: .95rem; border-top: 2px solid var(--ink); }
.spec-table caption {
  padding-bottom: 10px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--ink-faint);
}
.spec-table th, .spec-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.spec-table thead th {
  background: var(--paper);
  font-size: .84rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
}
.spec-table tbody tr:nth-child(even) { background: rgba(239, 231, 218, .5); }
.spec-table tbody tr:hover { background: var(--light-orange); }
.spec-table .is-key, .spec-table [data-emphasis] { font-weight: 700; }
.param--legacy { font-weight: 400; color: var(--ink-soft); }
.param--current { font-weight: 700; }

/* ---------- 14. 面包屑 ---------- */
.breadcrumb { font-size: .84rem; color: var(--ink-faint); }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  font-family: var(--font-mono);
  color: var(--line-strong);
}
.breadcrumb a {
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.breadcrumb a:hover { color: var(--peel-red); border-bottom-color: var(--peel-red); }
.breadcrumb [aria-current="page"] { color: var(--ink); font-weight: 600; }

/* ---------- 15. 图片容器（页面阶段放图） ---------- */
.figure { display: flex; flex-direction: column; gap: 10px; }
.figure__frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}
.figure__frame img { width: 100%; height: 100%; object-fit: cover; }
.figure__frame--empty::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(135deg, rgba(30, 27, 24, .06) 0 2px, transparent 2px 13px),
    radial-gradient(circle at 78% 22%, rgba(242, 140, 40, .3), rgba(242, 140, 40, 0) 56%),
    radial-gradient(circle at 20% 82%, rgba(46, 125, 91, .24), rgba(46, 125, 91, 0) 54%);
}
.figure__cap {
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--ink-faint);
}
.figure--macro .figure__frame { aspect-ratio: 1 / 1; }
.figure--archive .figure__frame { aspect-ratio: 3 / 2; }
.figure--wide .figure__frame { aspect-ratio: 21 / 9; }
.figure--portrait .figure__frame { aspect-ratio: 3 / 4; }

/* ---------- 16. 问答组件 ---------- */
.qa { border-top: 1px solid var(--line); }
.qa__item { border-bottom: 1px solid var(--line); }
.qa__q {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  list-style: none;
  transition: color .2s var(--ease);
}
.qa__q::after {
  content: "+";
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--accent);
}
.qa__item[open] .qa__q::after { content: "–"; }
.qa__q:hover { color: var(--flesh-orange); }
.qa__a { padding-bottom: 18px; max-width: 70ch; color: var(--ink-soft); }

/* ---------- 17. 响应式细节 ---------- */
@media (max-width: 640px) {
  :root { --header-h: 66px; }
  .brand__mark { font-size: 1.32rem; }
  .stat__num { font-size: clamp(1.7rem, 9vw, 2.4rem); }
}

/* ---------- 18. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .btn:hover, .panel:hover, .footer-links a:hover { transform: none; }
}