/* ================= 1. 重置与变量 ================= */
*, *::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 { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
table { border-collapse: collapse; }
[hidden] { display: none !important; }

:root {
  --fruit: #F2762E;
  --peach: #FFB37A;
  --berry: #C7305A;
  --berry-deep: #8E1F3F;
  --lime: #A8C93A;
  --lime-ice: #EAF3C9;
  --lime-deep: #6E8A1A;
  --cream: #FFF6EC;
  --bake: #F3E4D3;
  --cocoa: #3A2419;
  --cocoa-soft: #6B5449;
  --line: #E4D3C2;

  --font-display: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-body: var(--font-display);
  --font-index: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --fs-body: 17px;
  --lh-body: 1.75;
  --radius: 2px;
  --pw: clamp(20px, 4vw, 56px);
  --maxw: 1280px;
  --gap: clamp(16px, 2.2vw, 28px);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

body {
  background: var(--cream);
  color: var(--cocoa);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--peach); color: var(--cocoa); }

:focus-visible { outline: 2px solid var(--berry); outline-offset: 2px; }
.site-footer :focus-visible { outline-color: var(--lime); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
}
h1 { font-size: clamp(34px, 6vw, 68px); line-height: 1.04; letter-spacing: -0.03em; }
h2 { font-size: clamp(28px, 4vw, 48px); }
h3 { font-size: 22px; }
h4 { font-size: 18px; }
strong { font-weight: 700; }
code, kbd, samp { font-family: var(--font-index); font-size: .92em; }

/* ================= 2. 布局容器 ================= */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pw);
}

.section { padding-block: clamp(48px, 7vw, 88px); }
.section--cream { background: var(--cream); }
.section--bake { background: var(--bake); }
.section--cocoa { background: var(--cocoa); color: var(--cream); }
.section--cocoa .section__lede,
.section--cocoa .lede,
.section--cocoa .prose { color: rgba(255, 246, 236, .76); }
.section--cocoa .section__title { color: var(--cream); }
.section--grid {
  background-image:
    linear-gradient(rgba(228, 211, 194, .55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(228, 211, 194, .55) 1px, transparent 1px);
  background-size: 64px 64px;
}

.section__head { max-width: 940px; margin-bottom: clamp(24px, 3vw, 40px); }
.section__title { font-family: var(--font-display); font-weight: 900; font-size: clamp(28px, 4vw, 48px); line-height: 1.1; letter-spacing: -0.02em; }
.section__lede { margin-top: 14px; font-size: clamp(16px, 1.5vw, 19px); color: var(--cocoa-soft); max-width: 64ch; }

.page-head { padding-block: clamp(28px, 4vw, 56px) clamp(14px, 2vw, 26px); }
.page-head__title { font-size: clamp(32px, 5vw, 64px); }

.prose { max-width: 68ch; }
.prose p + p { margin-top: 1em; }
.prose h3 { margin-top: 1.6em; margin-bottom: .5em; }
.prose ul { margin-top: .8em; display: grid; gap: .5em; }
.prose li { position: relative; padding-left: 20px; }
.prose li::before { content: ""; position: absolute; left: 0; top: .68em; width: 8px; height: 8px; background: var(--fruit); }
.prose a { color: var(--berry-deep); text-underline-offset: 3px; }

.lede { font-size: clamp(17px, 1.7vw, 20px); color: var(--cocoa-soft); max-width: 62ch; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-index); font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--berry); margin-bottom: 12px;
}
.eyebrow::before { content: ""; width: 24px; height: 1px; background: var(--berry); }
.section--cocoa .eyebrow { color: var(--peach); }
.section--cocoa .eyebrow::before { background: var(--peach); }

/* 12 列网格 */
.grid-12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: var(--gap); }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ================= 3. 通用组件 ================= */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px;
  border: 1px solid var(--cocoa); border-radius: var(--radius);
  background: transparent; color: var(--cocoa);
  font-weight: 700; font-size: 15px; line-height: 1.2;
  text-decoration: none; cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.btn:hover { background: var(--cocoa); color: var(--cream); }
.btn--primary { background: var(--fruit); border-color: var(--fruit); color: var(--cocoa); }
.btn--primary:hover { background: var(--berry); border-color: var(--berry); color: var(--cream); }
.btn--berry { background: var(--berry); border-color: var(--berry); color: var(--cream); }
.btn--berry:hover { background: var(--berry-deep); border-color: var(--berry-deep); color: var(--cream); }
.btn--ghost { border-color: var(--line); color: var(--cocoa-soft); }
.btn--ghost:hover { background: var(--bake); border-color: var(--line); color: var(--cocoa); }

.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line); border-radius: 999px;
  background: var(--cream); color: var(--cocoa-soft);
  font-family: var(--font-index); font-size: 11px; letter-spacing: .06em; line-height: 1.6;
}
.tag--lime { background: var(--lime-ice); border-color: var(--lime); color: var(--lime-deep); }
.tag--berry { background: var(--berry); border-color: var(--berry); color: var(--cream); }

.state-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--lime); }
.state-dot--berry { background: var(--berry); }

.breadcrumb { padding-top: 18px; }
.breadcrumb__list {
  display: flex; flex-wrap: wrap; gap: 8px;
  font-family: var(--font-index); font-size: 12px; letter-spacing: .04em; color: var(--cocoa-soft);
}
.breadcrumb__item { display: flex; align-items: center; }
.breadcrumb__item + .breadcrumb__item::before { content: "/"; color: var(--line); margin-right: 8px; }
.breadcrumb__link { text-decoration: none; color: var(--cocoa-soft); }
.breadcrumb__link:hover { color: var(--berry); }

/* 目录横条 */
.index-strip {
  overflow-x: auto; overflow-y: hidden;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: var(--cream);
  cursor: grab;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.index-strip.is-dragging { cursor: grabbing; }
.index-strip::-webkit-scrollbar { height: 6px; }
.index-strip::-webkit-scrollbar-thumb { background: var(--line); }
.index-strip__track { display: flex; min-width: max-content; align-items: stretch; }
.index-strip__item {
  flex: 0 0 auto;
  width: clamp(190px, 22vw, 264px);
  padding: 20px 24px;
  border-right: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 8px;
  text-decoration: none; background: transparent;
  transition: background .2s var(--ease);
}
.index-strip__item:last-child { border-right: 0; }
.index-strip__item:hover { background: var(--lime-ice); }
.index-strip__num { font-family: var(--font-index); font-size: 13px; letter-spacing: .1em; color: var(--berry); }
.index-strip__label { font-family: var(--font-display); font-weight: 900; font-size: 20px; letter-spacing: -0.01em; }
.index-strip__text { font-size: 14px; color: var(--cocoa-soft); }

/* 章节卡 */
.chapter-card {
  display: flex; flex-direction: column; gap: 12px;
  padding: 26px 24px 28px;
  background: var(--cream);
  border: 1px solid var(--line); border-top: 3px solid var(--fruit);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background .2s var(--ease), transform .2s var(--ease);
}
.chapter-card:hover { background: var(--bake); }
.chapter-card__num { font-family: var(--font-index); font-size: clamp(40px, 5vw, 64px); line-height: .9; letter-spacing: -0.04em; color: var(--fruit); }
.chapter-card__title { font-family: var(--font-display); font-weight: 900; font-size: 21px; letter-spacing: -0.01em; }
.chapter-card__text { font-size: 15px; color: var(--cocoa-soft); }
.chapter-card--berry { border-top-color: var(--berry); }
.chapter-card--berry .chapter-card__num { color: var(--berry); }
.chapter-card--lime { border-top-color: var(--lime); }
.chapter-card--lime .chapter-card__num { color: var(--lime-deep); }
.chapter-card--cocoa { background: var(--cocoa); border-color: var(--cocoa); border-top-color: var(--peach); color: var(--cream); }
.chapter-card--cocoa .chapter-card__text { color: rgba(255, 246, 236, .72); }
.chapter-card--cocoa:hover { background: #2c1a12; }

.stagger > *:nth-child(even) { margin-top: 32px; }

/* 表格 */
.table-scroll { overflow-x: auto; border: 1px solid var(--line); background: var(--cream); }
.data-table { width: 100%; min-width: 640px; font-size: 15px; }
.data-table th, .data-table td { padding: 14px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.data-table thead th {
  background: var(--berry-deep); color: var(--cream);
  font-family: var(--font-index); font-size: 12px; font-weight: 500; letter-spacing: .08em;
}
.data-table tbody tr:nth-child(even) { background: var(--bake); }
.data-table td:first-child { font-family: var(--font-index); font-size: 13px; color: var(--berry-deep); white-space: nowrap; }
.data-table__mark { background: var(--lime-ice); font-weight: 700; color: var(--cocoa); }

/* 筛选 */
.filter-bar {
  position: relative;
  display: inline-flex; flex-wrap: nowrap; gap: 4px;
  max-width: 100%; overflow-x: auto;
  padding: 6px;
  background: var(--bake);
  border: 1px solid var(--line); border-radius: var(--radius);
}
.filter-bar__pill {
  position: absolute; top: 6px; left: 0;
  height: calc(100% - 12px); width: 0;
  background: var(--lime); border-radius: 1px; opacity: 0; z-index: 0;
  transition: transform .3s var(--ease), width .3s var(--ease), opacity .2s var(--ease);
}
.filter-btn {
  position: relative; z-index: 1;
  padding: 8px 16px;
  background: transparent; border: 0; border-radius: 1px;
  color: var(--cocoa-soft); font-size: 14px; font-weight: 700; white-space: nowrap; cursor: pointer;
  transition: color .2s var(--ease);
}
.filter-btn:hover { color: var(--cocoa); }
.filter-btn.is-active { color: var(--cocoa); }

/* 路径 / 技能树 */
.path-list { display: flex; flex-direction: column; }
.path-step { position: relative; padding: 18px 0 18px 60px; border-bottom: 1px solid var(--line); }
.path-step::before { content: ""; position: absolute; left: 20px; top: 0; bottom: 0; width: 1px; background: var(--line); }
.path-step:first-child::before { top: 50%; }
.path-step:last-child::before { bottom: 50%; }
.path-step:last-child { border-bottom: 0; }
.path-step__num {
  position: absolute; left: 0; top: 20px;
  width: 40px; padding: 3px 0; text-align: center;
  background: var(--fruit); color: var(--cocoa);
  border-radius: 999px;
  font-family: var(--font-index); font-size: 12px; line-height: 1.4;
}
.path-step__title { font-family: var(--font-display); font-weight: 900; font-size: 19px; margin-bottom: 4px; }
.path-step__text { font-size: 15px; color: var(--cocoa-soft); }

/* 手风琴 */
.accordion { border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__trigger {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  width: 100%; padding: 18px 4px;
  background: transparent; border: 0; text-align: left; cursor: pointer;
  font-family: var(--font-display); font-weight: 700; font-size: 18px; line-height: 1.4;
}
.accordion__trigger::after { content: "+"; font-family: var(--font-index); font-size: 20px; color: var(--berry); }
.accordion__trigger[aria-expanded="true"]::after { content: "–"; }
.accordion__trigger:hover { color: var(--berry-deep); }
.accordion__panel { padding: 0 4px 20px; color: var(--cocoa-soft); max-width: 68ch; }

/* 图片容器基础规则（供页面阶段放图） */
.media-frame {
  position: relative; overflow: hidden;
  background: var(--bake);
  border: 1px solid var(--line); border-radius: var(--radius);
  aspect-ratio: 4 / 3;
}
.media-frame--wide { aspect-ratio: 16 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame__img { width: 100%; height: 100%; object-fit: cover; }
.media-frame__cap {
  position: absolute; inset: auto 0 0 0;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(58, 36, 25, 0), rgba(58, 36, 25, .86));
  color: var(--cream); font-family: var(--font-index); font-size: 12px; letter-spacing: .04em;
}

/* ================= 4. 页头 ================= */
.skip-link {
  position: absolute; left: 12px; top: -80px; z-index: 100;
  padding: 10px 16px;
  background: var(--cocoa); color: var(--cream);
  font-size: 14px; font-weight: 700; text-decoration: none;
  border-radius: var(--radius);
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

.scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 60;
  width: 0; height: 3px;
  background: linear-gradient(90deg, var(--peach), var(--fruit) 52%, var(--berry) 82%, var(--lime));
}

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--cream);
  border-bottom: 1px solid var(--line);
  padding-top: 3px;
}
.site-header__inner {
  display: flex; align-items: center;
  gap: clamp(14px, 2vw, 28px);
  padding-block: 13px;
}

.brand { display: flex; flex-direction: column; align-items: flex-start; gap: 2px; margin-right: auto; text-decoration: none; }
.brand__mark { font-family: var(--font-display); font-weight: 900; font-size: clamp(20px, 2.2vw, 26px); line-height: 1.1; letter-spacing: -0.02em; color: var(--cocoa); }
.brand__meta { display: flex; flex-wrap: wrap; gap: 10px; font-family: var(--font-index); font-size: 11px; letter-spacing: .04em; color: var(--cocoa-soft); }
.brand__region { color: var(--berry); }
.brand:hover .brand__mark { color: var(--berry-deep); }

.header-aside { display: flex; align-items: center; gap: clamp(10px, 1.4vw, 18px); }

.primary-nav__list { display: flex; align-items: center; gap: 2px; }
.primary-nav__item { display: flex; }
.primary-nav__link {
  display: inline-flex; align-items: baseline; gap: 6px;
  padding: 7px 10px;
  border: 1px solid transparent; border-radius: var(--radius);
  color: var(--cocoa); font-size: 15px; font-weight: 500; text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.primary-nav__link:hover { background: var(--bake); border-color: var(--line); }
.primary-nav__num { font-family: var(--font-index); font-size: 11px; letter-spacing: .04em; color: var(--cocoa-soft); }
.primary-nav__link[aria-current="page"] { background: var(--lime-ice); border-color: var(--lime); color: var(--berry-deep); font-weight: 700; }
.primary-nav__link[aria-current="page"] .primary-nav__num { color: var(--berry); }

.nav-toggle {
  display: none; align-items: center; gap: 8px;
  padding: 8px 12px;
  background: var(--bake); border: 1px solid var(--line); border-radius: var(--radius);
  font-size: 13px; font-weight: 700; cursor: pointer;
}
.nav-toggle:hover { background: var(--peach); }
.nav-toggle__bars { display: flex; flex-direction: column; gap: 3px; }
.nav-toggle__bars i { display: block; width: 16px; height: 2px; background: var(--cocoa); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

.save-badge-wrap { position: relative; }
.save-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px;
  background: var(--cream); border: 1px solid var(--cocoa); border-radius: var(--radius);
  color: var(--cocoa); font-size: 13px; font-weight: 700; letter-spacing: .02em; cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.save-badge:hover { background: var(--bake); }
.save-badge__mark { display: block; width: 10px; height: 10px; border: 1.5px solid currentColor; border-radius: 1px; }
.save-badge.is-on { background: var(--berry); border-color: var(--berry); color: var(--cream); animation: badge-pop .18s var(--ease); }
.save-badge.is-on .save-badge__mark { background: currentColor; }
@keyframes badge-pop {
  0% { transform: scale(1); }
  55% { transform: scale(1.09); }
  100% { transform: scale(1); }
}
.save-bubble {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: 5;
  padding: 7px 11px;
  background: var(--cocoa); color: var(--cream);
  border-radius: var(--radius);
  font-family: var(--font-index); font-size: 12px; white-space: nowrap;
  opacity: 0; transform: translateY(-4px); pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
}
.save-bubble.is-on { opacity: 1; transform: translateY(0); }

/* ================= 5. 页脚 ================= */
.site-footer {
  background: var(--cocoa);
  color: var(--cream);
  margin-top: clamp(48px, 8vw, 96px);
}
.footer__inner { padding-block: clamp(40px, 6vw, 72px) 0; }
.footer__brand {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 10px 24px;
  padding-bottom: clamp(22px, 3vw, 34px);
  border-bottom: 1px solid rgba(255, 246, 236, .18);
}
.footer__mark { font-family: var(--font-display); font-weight: 900; font-size: clamp(32px, 6vw, 52px); line-height: 1; letter-spacing: -0.03em; color: var(--cream); }
.footer__tag { font-family: var(--font-index); font-size: 12px; letter-spacing: .06em; color: var(--peach); }

.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap);
  padding-block: clamp(26px, 4vw, 46px);
}
.footer-col { border-top: 1px solid rgba(255, 246, 236, .16); padding-top: 16px; }
.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-index); font-size: 12px; font-weight: 500; letter-spacing: .14em;
  color: var(--peach);
}
.footer-list { display: flex; flex-direction: column; gap: 9px; }
.footer-list__link { color: rgba(255, 246, 236, .86); font-size: 15px; text-decoration: none; }
.footer-list__link:hover { color: var(--lime); }
.footer-list__meta { color: rgba(255, 246, 236, .6); font-size: 14px; }

.footer-contact { display: flex; flex-direction: column; gap: 12px; font-size: 14px; }
.contact-line { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; }
.contact-line__label { font-family: var(--font-index); font-size: 11px; letter-spacing: .1em; color: rgba(255, 246, 236, .55); }
.contact-line__value { color: var(--cream); word-break: break-word; }
.copy-btn {
  padding: 3px 9px;
  background: transparent;
  border: 1px solid rgba(255, 246, 236, .35); border-radius: 999px;
  color: rgba(255, 246, 236, .8);
  font-family: var(--font-index); font-size: 11px; cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}
.copy-btn:hover { border-color: var(--lime); color: var(--lime); }
.copy-tip { display: block; min-height: 1em; font-family: var(--font-index); font-size: 11px; color: var(--lime); opacity: 0; transition: opacity .2s var(--ease); }
.copy-tip.is-on { opacity: 1; }

.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  padding-block: 20px;
  border-top: 1px solid rgba(255, 246, 236, .18);
}
.footer-bottom__note { font-family: var(--font-index); font-size: 12px; letter-spacing: .04em; color: rgba(255, 246, 236, .6); }

/* ================= 6. 显现动效 ================= */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity .32s ease-out, transform .32s ease-out;
}
.js-ready [data-reveal].is-revealed { opacity: 1; transform: translateX(0); }

/* ================= 7. 响应式 ================= */
@media (max-width: 1200px) {
  .span-3 { grid-column: span 6; }
  .span-4 { grid-column: span 6; }
  .span-5 { grid-column: span 6; }
  .span-7 { grid-column: span 12; }
  .span-8 { grid-column: span 12; }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1100px) and (min-width: 901px) {
  .primary-nav__link { font-size: 14px; padding: 7px 7px; }
  .primary-nav__num { display: none; }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .site-header__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand aside"
      "nav nav";
    align-items: center;
    row-gap: 10px;
    column-gap: 12px;
  }
  .brand { grid-area: brand; margin-right: 0; }
  .header-aside { grid-area: aside; gap: 10px; }
  .primary-nav {
    grid-area: nav;
    display: none;
    border-top: 1px solid var(--line);
    padding-top: 6px;
  }
  .site-header[data-open] .primary-nav { display: block; }
  .primary-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 6px;
    border-radius: 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }
  .primary-nav__link:hover { background: var(--bake); }
  .primary-nav__link[aria-current="page"] { background: var(--lime-ice); }
  .primary-nav__item:last-child .primary-nav__link { border-bottom: 0; }

  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8 { grid-column: span 6; }
  .span-12 { grid-column: span 6; }
  .stagger > *:nth-child(even) { margin-top: 0; }
  .footer__tag { flex-basis: 100%; }
}

@media (max-width: 600px) {
  :root { --pw: 20px; }
  .footer__grid { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .footer-bottom { flex-direction: column; }
  .index-strip__item { width: 200px; padding: 16px 18px; }
  .path-step { padding-left: 50px; }
  .path-step__num { width: 34px; }
  .path-step::before { left: 17px; }
  .save-badge { padding: 8px 11px; }
}

/* ================= 8. 减弱动效 ================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js-ready [data-reveal] { opacity: 1 !important; transform: none !important; }
  .save-bubble { transform: none !important; }
}