/* ===== 字体引入 ===== */
@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@300;400;500;600;700&family=Orbitron:wght@400;500;600;700&display=swap');

/* ===== CSS变量 ===== */
:root {
  --c-paper: #fafaf8;
  --c-mid: #4a4a4a;
  --c-ink: #1a1a1a;
  --c-ink-faint: rgba(26,26,26,0.08);
  --c-ink-light: rgba(26,26,26,0.18);
  --c-ink-mid: rgba(26,26,26,0.55);
  --c-accent: #c8a96e;
  --c-accent-dim: rgba(200,169,110,0.15);
  --nav-w: 220px;
  --content-max: 760px;
  --radius-sm: 4px;
  --ff-head: 'Orbitron', 'Exo 2', monospace;
  --ff-body: 'Exo 2', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fs-base: 16px;
  --lh-base: 1.7;
  --transition-raw: none;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: var(--fs-base); scroll-behavior: smooth; }
body {
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  background-color: var(--c-paper);
  color: var(--c-ink);
  min-height: 100vh;
  position: relative;
}

/* 纸张纹理叠加 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.6;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== 左侧固定导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-w);
  height: 100vh;
  background-color: var(--c-ink);
  border-right: 2px solid var(--c-mid);
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
}

/* 手绘边框感 */
.site-header::after {
  content: '';
  position: absolute;
  top: 0; right: -1px;
  width: 3px; height: 100%;
  background: repeating-linear-gradient(
    to bottom,
    var(--c-accent) 0px,
    var(--c-accent) 3px,
    transparent 3px,
    transparent 8px
  );
  opacity: 0.5;
}

.site-nav {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  padding: 0 0 24px 0;
  min-height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 20px auto 8px;
  background: var(--c-paper);
  border: 2px solid var(--c-accent);
  border-radius: 4px;
  transform: rotate(-2deg);
  transition: var(--transition-raw);
  flex-shrink: 0;
}

.nav-brand:hover {
  transform: rotate(1deg) scale(1.06);
  text-decoration: none;
}

.nav-logo-mark { width: 32px; height: 32px; object-fit: contain; }

.nav-brand-mark {
  font-family: var(--ff-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1;
}

.nav-announce {
  font-size: 10px;
  color: var(--c-accent);
  text-align: center;
  padding: 6px 12px;
  letter-spacing: 0.04em;
  border-top: 1px dashed rgba(200,169,110,0.3);
  border-bottom: 1px dashed rgba(200,169,110,0.3);
  margin: 8px 0 12px;
  line-height: 1.4;
}

.nav-link {
  display: block;
  font-family: var(--ff-body);
  font-size: 12.5px;
  font-weight: 500;
  color: rgba(250,250,248,0.75);
  padding: 10px 16px;
  margin: 2px 10px;
  border-radius: 20px;
  border: 1px solid transparent;
  letter-spacing: 0.02em;
  line-height: 1.4;
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: var(--transition-raw);
  position: relative;
}

.nav-link:hover,
.nav-link--active {
  background: rgba(200,169,110,0.12);
  border-color: rgba(200,169,110,0.4);
  color: var(--c-paper);
  text-decoration: none;
}

.nav-link--active {
  background: rgba(200,169,110,0.2);
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* ===== 页面主体偏移 ===== */
.page-wrap {
  margin-left: var(--nav-w);
  min-height: 100vh;
}

.main-content {
  width: 100%;
  max-width: calc(var(--content-max) + 80px);
  margin: 0 auto;
  padding: 48px 40px;
}

/* ===== 通用元素 ===== */
.breadcrumb {
  display: block;
  font-size: 12px;
  color: var(--c-ink-mid);
  margin-bottom: 16px;
  letter-spacing: 0.03em;
}

.breadcrumb a { color: var(--c-mid); }
.breadcrumb a:hover { color: var(--c-ink); }

.eyebrow-label {
  display: inline-block;
  font-family: var(--ff-head);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-accent);
  border-bottom: 1px solid var(--c-accent);
  padding-bottom: 2px;
  margin-bottom: 8px;
}

.section-h2 {
  font-family: var(--ff-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 24px;
  letter-spacing: 0.05em;
  position: relative;
  padding-left: 16px;
}

.section-h2::before {
  content: '';
  position: absolute;
  left: 0; top: 3px;
  width: 4px;
  height: calc(100% - 6px);
  background: var(--c-accent);
  transform: skewY(-4deg);
}

/* ===== 首页英雄区 ===== */
.home-article { width: 100%; }

.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin: -48px -40px 64px;
  width: calc(100% + 80px);
}

.hero-bg-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-8deg);
  font-family: var(--ff-head);
  font-size: clamp(120px, 22vw, 320px);
  font-weight: 700;
  color: var(--c-ink-faint);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
  letter-spacing: -0.02em;
  filter: blur(0.5px);
}

.hero-collage {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.hero-img {
  position: absolute;
  object-fit: cover;
  border: 3px solid var(--c-ink);
  box-shadow: 6px 6px 0 var(--c-ink);
}

.hero-img--a {
  width: 42%;
  max-height: 65vh;
  top: 10%;
  left: 5%;
  transform: rotate(-3deg);
  z-index: 2;
  filter: contrast(1.05) saturate(0.9);
}

.hero-img--b {
  width: 38%;
  max-height: 55vh;
  bottom: 8%;
  right: 6%;
  transform: rotate(2.5deg);
  z-index: 2;
  filter: contrast(1.08) grayscale(0.1);
}

.hero-text {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: 40px;
  background: rgba(250,250,248,0.88);
  border: 2px solid var(--c-ink);
  box-shadow: 5px 5px 0 var(--c-ink);
  max-width: 480px;
  transform: rotate(0.5deg);
}

.hero-h1 {
  font-family: var(--ff-head);
  font-size: clamp(20px, 3.5vw, 34px);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.hero-sub {
  font-size: 14px;
  color: var(--c-mid);
  line-height: 1.6;
  margin-bottom: 24px;
}

.hero-cta {
  display: inline-block;
  font-family: var(--ff-head);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--c-paper);
  background: var(--c-ink);
  border: 2px solid var(--c-ink);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  min-height: 44px;
  line-height: 1.2;
  box-shadow: 3px 3px 0 var(--c-accent);
  transition: var(--transition-raw);
}

.hero-cta:hover {
  background: var(--c-accent);
  border-color: var(--c-accent);
  color: var(--c-ink);
  text-decoration: none;
  box-shadow: 2px 2px 0 var(--c-ink);
}

/* ===== 首页内容与卡片 ===== */
.home-content-section {
  margin-bottom: 56px;
}

.home-cards-section {
  margin-bottom: 56px;
}

/* ===== 正文样式 ===== */
.content-prose {
  max-width: var(--content-max);
}

.content-prose h2,
.post-body h2,
.about-body h2,
.privacy-body h2,
.default-body h2,
.cat-content-wrap h2 {
  font-family: var(--ff-head);
  font-size: 20px;
  font-weight: 600;
  color: var(--c-ink);
  margin: 40px 0 16px;
  letter-spacing: 0.05em;
  position: relative;
  padding-left: 16px;
}

.content-prose h2::before,
.post-body h2::before,
.about-body h2::before,
.privacy-body h2::before,
.default-body h2::before,
.cat-content-wrap h2::before {
  content: '';
  position: absolute;
  left: 0; top: 3px;
  width: 4px;
  height: calc(100% - 6px);
  background: var(--c-accent);
  transform: skewY(-4deg);
}

.content-prose h3,
.post-body h3,
.about-body h3,
.privacy-body h3 {
  font-family: var(--ff-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  margin: 28px 0 12px;
  letter-spacing: 0.04em;
}

.content-prose p,
.post-body p,
.about-body p,
.privacy-body p,
.default-body p,
.cat-content-wrap p {
  font-size: 16px;
  line-height: var(--lh-base);
  color: var(--c-mid);
  margin-bottom: 18px;
  max-width: var(--content-max);
}

.content-prose a,
.post-body a,
.about-body a,
.privacy-body a {
  color: var(--c-ink);
  border-bottom: 1px dashed var(--c-accent);
  text-decoration: none;
}

.content-prose a:hover,
.post-body a:hover,
.about-body a:hover,
.privacy-body a:hover {
  border-bottom-style: solid;
  text-decoration: none;
}

.content-prose ul,
.post-body ul,
.content-prose ol,
.post-body ol {
  margin: 0 0 18px 24px;
  color: var(--c-mid);
  font-size: 16px;
  line-height: var(--lh-base);
}

.content-prose li,
.post-body li { margin-bottom: 8px; }

.content-prose strong,
.post-body strong { color: var(--c-ink); font-weight: 600; }

.content-prose blockquote,
.post-body blockquote {
  border-left: 3px solid var(--c-accent);
  padding: 12px 20px;
  margin: 20px 0;
  background: var(--c-ink-faint);
  font-style: italic;
  transform: rotate(-0.3deg);
}

/* ===== 卡片表格（首页精选） ===== */
.cards-table {
  width: 100%;
  border-collapse: collapse;
}

.card-row { transition: var(--transition-raw); }

.card-cell {
  padding: 0 0 16px 0;
}

.card-link {
  display: block;
  padding: 20px 24px;
  border: 1.5px solid var(--c-ink-light);
  border-bottom: 3px solid var(--c-accent);
  border-radius: var(--radius-sm);
  background: var(--c-paper);
  position: relative;
  overflow: hidden;
  transition: var(--transition-raw);
}

.card-link::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: repeating-linear-gradient(
    to right,
    var(--c-ink-light) 0px,
    var(--c-ink-light) 4px,
    transparent 4px,
    transparent 8px
  );
}

.card-link:hover {
  border-color: var(--c-ink);
  border-bottom-color: var(--c-accent);
  box-shadow: 3px 3px 0 var(--c-ink-light);
  transform: translate(-1px, -1px);
  text-decoration: none;
}

.card-label {
  display: block;
  font-size: 10px;
  font-family: var(--ff-head);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 6px;
}

.card-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
  margin-bottom: 8px;
}

.card-desc {
  display: block;
  font-size: 13px;
  color: var(--c-mid);
  line-height: 1.5;
  margin-bottom: 8px;
}

.card-date {
  display: block;
  font-size: 11px;
  color: var(--c-ink-mid);
  font-family: var(--ff-head);
  letter-spacing: 0.05em;
}

/* ===== 栏目页 ===== */
.cat-article { width: 100%; }

.cat-header {
  margin-bottom: 48px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--c-ink-light);
  position: relative;
}

.cat-header::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 60px;
  height: 2px;
  background: var(--c-accent);
}

.cat-h1 {
  font-family: var(--ff-head);
  font-size: clamp(22px, 4vw, 36px);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: 0.06em;
}

.cat-desc {
  font-size: 15px;
  color: var(--c-mid);
  line-height: 1.6;
  max-width: 600px;
}

.cat-content-wrap {
  margin-bottom: 48px;
  max-width: var(--content-max);
}

.cat-list-wrap { margin-bottom: 40px; }

/* 子页表格 */
.child-table {
  width: 100%;
  border-collapse: collapse;
}

.child-row {
  border-bottom: 1px dashed var(--c-ink-light);
}

.child-row.visible .child-index {
  opacity: 1;
  transform: translateY(0);
}

.child-cell {
  padding: 20px 0;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.child-cell--empty {
  color: var(--c-mid);
  font-style: italic;
  font-size: 14px;
}

.child-index {
  font-family: var(--ff-head);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-ink-faint);
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
  text-align: right;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.child-link {
  display: block;
  flex: 1;
  padding: 16px 20px;
  border: 1.5px solid var(--c-ink-light);
  border-bottom: 3px solid var(--c-accent);
  border-radius: var(--radius-sm);
  transition: var(--transition-raw);
}

.child-link:hover {
  border-color: var(--c-ink);
  border-bottom-color: var(--c-accent);
  box-shadow: 3px 3px 0 var(--c-ink-light);
  transform: translate(-1px, -1px);
  text-decoration: none;
}

.child-title {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
  margin-bottom: 6px;
}

.child-desc {
  display: block;
  font-size: 13px;
  color: var(--c-mid);
  line-height: 1.5;
  margin-bottom: 6px;
}

/* ===== 文章页 ===== */
.post-article { width: 100%; }

.post-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 2px solid var(--c-ink-light);
  position: relative;
}

.post-header::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 40px;
  height: 2px;
  background: var(--c-accent);
}

.post-h1 {
  font-family: var(--ff-head);
  font-size: clamp(20px, 3.5vw, 32px);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

.post-date {
  font-size: 12px;
  font-family: var(--ff-head);
  color: var(--c-ink-mid);
  letter-spacing: 0.05em;
  background: var(--c-ink-faint);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.post-date--mod { opacity: 0.75; }

.post-hero-figure {
  margin: 20px 0 0;
  transform: rotate(-0.5deg);
  border: 2px solid var(--c-ink);
  box-shadow: 4px 4px 0 var(--c-ink-light);
}

.article-hero-img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  display: block;
}

.post-body {
  max-width: var(--content-max);
  margin-bottom: 48px;
}

/* 相关推荐 */
.related-nav {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 2px dashed var(--c-ink-light);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.related-link {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-ink);
  border: 1.5px solid var(--c-ink-light);
  border-bottom: 2px solid var(--c-accent);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  min-height: 40px;
  transition: var(--transition-raw);
  line-height: 1.3;
}

.related-link:hover {
  background: var(--c-ink);
  color: var(--c-paper);
  border-color: var(--c-ink);
  text-decoration: none;
}

/* ===== 关于页 ===== */
.about-article { width: 100%; }

.about-header {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--c-ink-light);
}

.about-h1 {
  font-family: var(--ff-head);
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.2;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.about-body {
  max-width: var(--content-max);
  margin-bottom: 48px;
}

.about-nav-aside {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 2px dashed var(--c-ink-light);
}

.about-site-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 480px;
}

.about-nav-link {
  display: flex;
  align-items: center;
  font-size: 14px;
  color: var(--c-ink);
  padding: 12px 16px;
  border: 1.5px solid var(--c-ink-light);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius-sm);
  min-height: 44px;
  transition: var(--transition-raw);
}

.about-nav-link:hover {
  background: var(--c-ink-faint);
  border-left-color: var(--c-ink);
  text-decoration: none;
}

/* ===== 隐私页 ===== */
.privacy-article { width: 100%; }

.privacy-header {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--c-ink-light);
}

.privacy-h1 {
  font-family: var(--ff-head);
  font-size: clamp(20px, 3.5vw, 30px);
  font-weight: 700;
  color: var(--c-ink);
  line-height: 1.2;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.privacy-body {
  max-width: var(--content-max);
  margin-bottom: 40px;
}

.privacy-back-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1.5px solid var(--c-ink-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--c-mid);
  transition: var(--transition-raw);
}

.back-link:hover {
  border-color: var(--c-ink);
  color: var(--c-ink);
  text-decoration: none;
}

/* ===== 默认页 ===== */
.default-article { width: 100%; }

.default-header {
  margin-bottom: 32px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--c-ink-light);
}

.default-h1 {
  font-family: var(--ff-head);
  font-size: clamp(20px, 3.5vw, 30px);
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.default-body {
  max-width: var(--content-max);
  margin-bottom: 32px;
}

.default-back {
  margin-top: 24px;
}

/* ===== 页脚 ===== */
.site-footer {
  margin-left: var(--nav-w);
  background: var(--c-ink);
  color: var(--c-paper);
  padding: 0;
  position: relative;
}

.site-footer::before {
  content: '';
  display: block;
  height: 3px;
  background: repeating-linear-gradient(
    to right,
    var(--c-accent) 0px,
    var(--c-accent) 12px,
    transparent 12px,
    transparent 20px
  );
}

.footer-cta-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 40px 48px;
  border-bottom: 1px solid rgba(250,250,248,0.12);
  background: rgba(200,169,110,0.06);
}

.footer-cta-text {
  font-family: var(--ff-head);
  font-size: 18px;
  font-weight: 600;
  color: var(--c-paper);
  letter-spacing: 0.05em;
  line-height: 1.3;
  max-width: 400px;
}

.footer-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 28px;
  background: var(--c-accent);
  color: var(--c-ink);
  font-family: var(--ff-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: var(--radius-sm);
  border: 2px solid var(--c-accent);
  box-shadow: 3px 3px 0 rgba(250,250,248,0.2);
  transition: var(--transition-raw);
  white-space: nowrap;
}

.footer-cta-btn:hover {
  background: var(--c-paper);
  border-color: var(--c-paper);
  text-decoration: none;
  box-shadow: 2px 2px 0 var(--c-accent);
}

.footer-cols {
  display: flex;
  gap: 0;
  padding: 40px 48px;
  border-bottom: 1px solid rgba(250,250,248,0.1);
}

.footer-dl {
  flex: 1;
  padding-right: 32px;
}

.footer-dl:last-child { padding-right: 0; }

.footer-dl dt {
  font-family: var(--ff-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px dashed rgba(200,169,110,0.3);
}

.footer-dl dd {
  font-size: 13px;
  color: rgba(250,250,248,0.65);
  margin-bottom: 8px;
  line-height: 1.5;
}

.footer-dl dd a {
  color: rgba(250,250,248,0.65);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  padding: 4px 0;
  transition: color 0.1s;
}

.footer-dl dd a:hover {
  color: var(--c-paper);
  text-decoration: none;
}

.footer-bottom {
  padding: 20px 48px;
  font-size: 12px;
  color: rgba(250,250,248,0.35);
  letter-spacing: 0.04em;
}

/* ===== 并行动画（Stagger） ===== */
.js-stagger { opacity: 0; transform: translateY(16px); }
.js-stagger.visible { opacity: 1; transform: translateY(0); transition: opacity 0.5s ease, transform 0.5s ease; }

/* ===== 视差 ===== */
.hero-collage { will-change: transform; }

/* ===== 移动端断点 ===== */
@media (max-width: 900px) {
  :root { --nav-w: 0px; }

  .site-header {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 2px solid var(--c-mid);
  }

  .site-header::after { display: none; }

  .site-nav {
    flex-direction: row;
    align-items: center;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 8px 12px;
    gap: 4px;
    scrollbar-width: none;
  }

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

  .nav-brand {
    width: 40px; height: 40px;
    margin: 0 8px 0 0;
    flex-shrink: 0;
  }

  .nav-announce { display: none; }

  .nav-link {
    flex-shrink: 0;
    font-size: 11px;
    padding: 8px 12px;
    margin: 0;
    white-space: nowrap;
  }

  .page-wrap {
    margin-left: 0;
    padding-top: 60px;
  }

  .site-footer { margin-left: 0; }

  .main-content { padding: 32px 20px; }

  .hero-section {
    margin: -32px -20px 48px;
    width: calc(100% + 40px);
    min-height: 100vh;
  }

  .hero-img--a { width: 55%; top: 5%; left: 2%; }
  .hero-img--b { width: 48%; bottom: 5%; right: 2%; }

  .hero-text {
    padding: 24px 20px;
    max-width: 320px;
  }

  .footer-cta-block { padding: 28px 20px; }
  .footer-cols { flex-direction: column; padding: 28px 20px; gap: 28px; }
  .footer-dl { padding-right: 0; }
  .footer-bottom { padding: 16px 20px; }
}

@media (max-width: 600px) {
  .hero-bg-text { font-size: 100px; }

  .hero-img--a, .hero-img--b {
    width: 60%;
    max-height: 35vh;
  }

  .hero-img--b { display: none; }

  .hero-text {
    max-width: 90%;
    padding: 20px 16px;
  }

  .child-cell {
    flex-direction: column;
    gap: 8px;
  }

  .child-index {
    width: auto;
    font-size: 18px;
  }

  .related-links { flex-direction: column; }

  .footer-cta-block {
    flex-direction: column;
    text-align: center;
  }

  .footer-cta-text { font-size: 15px; }
}

/* ===== 减少动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  .js-stagger { opacity: 1 !important; transform: none !important; transition: none !important; }
  .child-index { opacity: 1 !important; transform: none !important; transition: none !important; }
  .hero-collage { will-change: auto; }
  html { scroll-behavior: auto; }
}