@import url('https://fonts.googleapis.com/css2?family=Cormorant:wght@400;500;600;700&family=Montserrat:wght@300;400;500;600;700&display=swap');

/* ── 变量 ── */
:root {
  --c-green: #87ff71;
  --c-blue: #01cdfe;
  --c-dark: #192617;
  --c-dark2: #0d1a10;
  --c-dark3: #1e3020;
  --c-purple: #b967ff;
  --c-pink: #ff71ce;
  --c-text: #d4f5c8;
  --c-text-dim: #8ab882;
  --c-glass: rgba(135, 255, 113, 0.06);
  --c-glass-border: rgba(135, 255, 113, 0.18);
  --c-glass-hover: rgba(1, 205, 254, 0.1);
  --radius-card: 28px;
  --radius-sm: 8px;
  --font-head: 'Cormorant', 'Georgia', serif;
  --font-body: 'Montserrat', system-ui, sans-serif;
  --nav-h: 60px;
  --max-w: 1200px;
  --content-max: 820px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background-color: var(--c-dark2);
  color: var(--c-text);
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    linear-gradient(180deg, #0a1a0c 0%, #192617 40%, #0d1a10 100%);
}

/* ── 扫描线叠层 ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.08) 2px,
    rgba(0,0,0,0.08) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── 链接 ── */
a { color: var(--c-green); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-blue); }

/* ── 文字 ── */
h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 600; }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 500; }
p { margin-bottom: 1em; }
img { max-width: 100%; height: auto; display: block; }

/* ── 眉题 small ── */
small.eyebrow-label,
small.sidebar-eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-blue);
  margin-bottom: 0.5rem;
}

/* ── 导航 ── */
.site-header {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 26, 16, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--c-glass-border);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1rem;
  height: var(--nav-h);
}

.header-brand {
  display: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
  white-space: nowrap;
  margin-bottom: 0;
}
.nav-links::-webkit-scrollbar { display: none; }

.nav-links a {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 0.75rem;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-text-dim);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: color var(--transition), background var(--transition);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--c-green);
  background: rgba(135,255,113,0.08);
  text-shadow: 0 0 8px rgba(135,255,113,0.5);
}

.nav-search {
  display: flex;
  align-items: center;
  padding-left: 0.5rem;
  flex-shrink: 0;
}

.search-input {
  background: rgba(135,255,113,0.07);
  border: 1px solid var(--c-glass-border);
  border-radius: 20px;
  padding: 0.35rem 0.9rem;
  font-size: 0.75rem;
  color: var(--c-text);
  width: 130px;
  outline: none;
  font-family: var(--font-body);
  transition: border-color var(--transition), width var(--transition);
}
.search-input:focus {
  border-color: var(--c-blue);
  width: 180px;
  box-shadow: 0 0 12px rgba(1,205,254,0.2);
}
.search-input::placeholder { color: var(--c-text-dim); }

/* ── 主体留底部导航空间 ── */
.page-main {
  padding-bottom: calc(var(--nav-h) + 2rem);
  padding-top: 2rem;
}

/* ── 页面布局：侧边栏 + 主内容 ── */
.content-wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.content-wrap.with-sidebar {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* ── 侧边栏 ── */
.sidebar {
  position: sticky;
  top: 2rem;
}
.sidebar-inner {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.sidebar-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--c-text-dim);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.sidebar-link:hover {
  color: var(--c-green);
  border-left-color: var(--c-green);
  background: rgba(135,255,113,0.06);
  padding-left: 1rem;
}
.sidebar-cta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.sidebar-tags {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

/* ── 正文文章 ── */
.content-article {
  min-width: 0;
}

/* ── 面包屑 ── */
.breadcrumb {
  font-size: 0.78rem;
  color: var(--c-text-dim);
  margin-bottom: 1rem;
}
.breadcrumb a { color: var(--c-blue); }
.breadcrumb a:hover { color: var(--c-green); }

/* ── 页面标题 ── */
.page-h1 {
  color: var(--c-green);
  text-shadow: 0 0 20px rgba(135,255,113,0.4), 0 0 60px rgba(135,255,113,0.15);
  margin-bottom: 1rem;
}

/* ── 正文 prose ── */
.prose {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-text);
  max-width: var(--content-max);
}
.prose h2 { color: var(--c-blue); margin: 2rem 0 0.75rem; text-shadow: 0 0 12px rgba(1,205,254,0.3); }
.prose h3 { color: var(--c-green); margin: 1.5rem 0 0.5rem; }
.prose ul, .prose ol { padding-left: 1.5rem; margin-bottom: 1em; }
.prose li { margin-bottom: 0.4em; }
.prose a { color: var(--c-blue); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--c-green); }
.prose strong { color: var(--c-green); font-weight: 600; }
.prose blockquote {
  border-left: 3px solid var(--c-purple);
  padding-left: 1rem;
  color: var(--c-text-dim);
  font-style: italic;
  margin: 1.5rem 0;
}
.prose code {
  background: rgba(185,103,255,0.15);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  font-size: 0.9em;
  color: var(--c-purple);
}

/* ── 按钮 ── */
.btn-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1.4rem;
  background: linear-gradient(135deg, var(--c-green), #5ddc48);
  color: var(--c-dark2);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border-radius: 22px;
  border: none;
  cursor: pointer;
  text-shadow: none;
  box-shadow: 0 0 16px rgba(135,255,113,0.45), 0 4px 12px rgba(0,0,0,0.4);
  transition: all var(--transition);
}
.btn-neon:hover {
  color: var(--c-dark2);
  background: linear-gradient(135deg, #a0ff88, var(--c-green));
  box-shadow: 0 0 30px rgba(135,255,113,0.7), 0 6px 20px rgba(0,0,0,0.5);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1.4rem;
  background: transparent;
  color: var(--c-blue);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  border-radius: 22px;
  border: 1px solid var(--c-blue);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(1,205,254,0.2);
  transition: all var(--transition);
}
.btn-ghost:hover {
  background: rgba(1,205,254,0.1);
  box-shadow: 0 0 20px rgba(1,205,254,0.4);
  color: var(--c-blue);
  transform: translateY(-2px);
}

/* ── 玻璃卡片 ── */
.glass-card {
  background: var(--c-glass);
  border: 1px solid var(--c-glass-border);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(135,255,113,0.04) 0%, rgba(1,205,254,0.04) 100%);
  border-radius: inherit;
  pointer-events: none;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 20px rgba(135,255,113,0.12);
  border-color: rgba(135,255,113,0.35);
  background: var(--c-glass-hover);
}
.glass-card h3 a {
  color: var(--c-text);
  font-family: var(--font-head);
}
.glass-card h3 a:hover { color: var(--c-green); }
.card-desc {
  font-size: 0.85rem;
  color: var(--c-text-dim);
  margin-bottom: 0.75rem;
  line-height: 1.6;
}
.card-date {
  font-size: 0.75rem;
  color: var(--c-blue);
  font-weight: 500;
  font-family: var(--font-body);
}
.card-date time { color: inherit; }
.card-num {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-purple);
  display: block;
  margin-bottom: 0.5rem;
}
.card-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-pink);
  display: block;
  margin-bottom: 0.4rem;
}

/* ── 标签胶囊 ── */
.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  border: 1px solid rgba(185,103,255,0.4);
  color: var(--c-purple);
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(185,103,255,0.08);
  transition: all var(--transition);
  min-height: 32px;
  margin-right: 0.4rem;
  margin-bottom: 0.4rem;
}
.tag-pill:hover {
  background: rgba(185,103,255,0.2);
  color: var(--c-purple);
  box-shadow: 0 0 12px rgba(185,103,255,0.3);
}

/* ── section h2 ── */
.section-h2 {
  color: var(--c-text);
  margin-bottom: 1.5rem;
  font-family: var(--font-head);
}

/* ────────────────────────────────
   首页 Hero
──────────────────────────────── */
.hero-article {
  max-width: var(--max-w);
  margin: 0 auto 4rem;
  padding: 0 1.25rem;
}
.hero-section {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  width: 100%;
  padding: 4rem 0 3rem;
  position: relative;
  z-index: 2;
}
.hero-text {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.hero-eyebrow {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-blue);
  text-transform: uppercase;
  margin-bottom: 0;
}
.hero-h1 {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--c-green);
  text-shadow: 0 0 30px rgba(135,255,113,0.5), 0 0 80px rgba(135,255,113,0.2);
  line-height: 1.1;
}
.hero-sub {
  font-size: 1rem;
  color: var(--c-text-dim);
  max-width: 400px;
  line-height: 1.7;
  margin-bottom: 0;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.hero-media {
  position: relative;
  height: 400px;
}
.hero-img-wrap {
  position: absolute;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.hero-img-wrap.a {
  width: 65%;
  top: 0;
  right: 0;
  border: 1px solid rgba(135,255,113,0.2);
  box-shadow: 0 0 30px rgba(135,255,113,0.15), 0 20px 60px rgba(0,0,0,0.5);
}
.hero-img-wrap.b {
  width: 55%;
  bottom: 0;
  left: 0;
  border: 1px solid rgba(1,205,254,0.2);
  box-shadow: 0 0 30px rgba(1,205,254,0.15), 0 20px 60px rgba(0,0,0,0.5);
  z-index: 1;
}
.hero-img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg-text {
  position: absolute;
  bottom: -1rem;
  right: -1rem;
  font-family: var(--font-head);
  font-size: clamp(5rem, 15vw, 12rem);
  font-weight: 700;
  color: rgba(135,255,113,0.04);
  pointer-events: none;
  user-select: none;
  line-height: 1;
  z-index: 0;
}
.hero-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(135,255,113,0.015) 3px,
    rgba(135,255,113,0.015) 4px
  );
  pointer-events: none;
  z-index: 1;
}

/* ── 首页分区列表 ── */
.home-content-article {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.home-prose-section {
  margin-bottom: 4rem;
}
.home-prose { max-width: var(--content-max); }
.section-cards-section,
.latest-stories-section {
  margin-bottom: 4rem;
}
.section-cards-list,
.stories-grid,
.child-cards-list,
.tag-stories-list {
  list-style: none;
  display: grid;
  gap: 1.5rem;
}
.section-cards-list,
.stories-grid {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.child-cards-list,
.tag-stories-list {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.section-card h3 { margin-bottom: 0.5rem; }
.card-children {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.75rem;
}
.section-child-link {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-blue);
  padding: 0.2rem 0.6rem;
  border: 1px solid rgba(1,205,254,0.3);
  border-radius: 12px;
  background: rgba(1,205,254,0.07);
  transition: all var(--transition);
}
.section-child-link:hover {
  background: rgba(1,205,254,0.18);
  color: var(--c-blue);
}

/* ── 栏目页 ── */
.section-header-section { margin-bottom: 2rem; }
.section-desc {
  color: var(--c-text-dim);
  font-size: 1rem;
  max-width: 600px;
  margin-bottom: 0;
}
.prose-section { margin-bottom: 3rem; }
.children-section { margin-top: 1rem; }

/* ── 文章页 ── */
.story-article {}
.story-header-section { margin-bottom: 2rem; }
.story-h1 { margin-bottom: 0.75rem; }
.story-meta-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}
.story-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-blue);
  font-family: var(--font-body);
}
.story-modified {
  font-size: 0.78rem;
  color: var(--c-text-dim);
}
.story-hero {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--c-glass-border);
  margin-bottom: 2rem;
}
.story-hero-img { width: 100%; height: auto; }
.story-body-section { margin-bottom: 2.5rem; }
.story-prose { max-width: var(--content-max); }
.story-footer-section {
  border-top: 1px solid var(--c-glass-border);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.story-tags { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem; }
.story-nav-links { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-left: auto; }

/* ── 关于页 ── */
.about-article {}
.about-header-section { margin-bottom: 2rem; }
.about-intro { font-size: 1.1rem; color: var(--c-text-dim); max-width: 600px; margin-bottom: 0; }
.about-content-section { margin-bottom: 3rem; }
.about-links-section { margin-top: 1rem; }
.about-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}
.about-nav-card {
  display: block;
}
.about-nav-card h3 { color: var(--c-green); margin-bottom: 0.4rem; font-size: 1rem; }
.about-nav-card p { font-size: 0.82rem; color: var(--c-text-dim); margin-bottom: 0; }

/* ── 隐私页 ── */
.privacy-article {}
.privacy-header-section { margin-bottom: 1.5rem; }
.privacy-updated { font-size: 0.8rem; color: var(--c-text-dim); }
.privacy-body-section { margin-bottom: 2.5rem; }
.privacy-prose { max-width: var(--content-max); }
.privacy-footer-section { border-top: 1px solid var(--c-glass-border); padding-top: 1.5rem; }
.privacy-nav { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ── 标签页 ── */
.tag-article {}
.tag-header-section { margin-bottom: 2rem; }
.tag-desc { color: var(--c-text-dim); font-size: 1rem; max-width: 540px; margin-bottom: 0; }
.tag-content-section { margin-bottom: 2.5rem; }
.tag-list-section { margin-top: 1rem; }
.tag-story-card { }

/* ── 页脚 ── */
.site-footer {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-glass-border);
  padding-bottom: calc(var(--nav-h) + 0.5rem);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3rem 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.footer-brand-block {
  text-align: center;
}
.footer-brand-big {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 8vw, 6rem);
  font-weight: 700;
  color: transparent;
  background: linear-gradient(135deg, var(--c-green) 0%, var(--c-blue) 50%, var(--c-purple) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  display: block;
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: none;
  filter: drop-shadow(0 0 20px rgba(135,255,113,0.3));
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: center;
}
.footer-nav a {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--c-text-dim);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  min-height: 40px;
  display: flex;
  align-items: center;
  transition: color var(--transition), background var(--transition);
}
.footer-nav a:hover {
  color: var(--c-green);
  background: rgba(135,255,113,0.07);
}
.footer-copy {
  text-align: center;
}
.footer-copy p {
  font-size: 0.75rem;
  color: rgba(132,184,122,0.5);
  margin-bottom: 0;
}

/* ── 日期 meta ── */
.story-meta {
  font-size: 0.8rem;
  color: var(--c-blue);
  margin-bottom: 1.5rem;
  font-family: var(--font-body);
  font-weight: 500;
}

/* ── Scroll Reveal 动效 ── */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.55s ease, transform 0.55s ease;
  }
  .reveal.visible {
    opacity: 1;
    transform: none;
  }

  /* 霓虹呼吸动效 */
  .hero-h1 {
    animation: neon-pulse 3s ease-in-out infinite alternate;
  }
  @keyframes neon-pulse {
    from { text-shadow: 0 0 20px rgba(135,255,113,0.4), 0 0 60px rgba(135,255,113,0.15); }
    to   { text-shadow: 0 0 30px rgba(135,255,113,0.7), 0 0 90px rgba(135,255,113,0.3), 0 0 5px #fff; }
  }

  /* Glitch 效果（小幅） */
  .page-h1 {
    animation: glitch-subtle 6s infinite;
  }
  @keyframes glitch-subtle {
    0%,94%,100% { transform: none; filter: none; }
    95% { transform: translate(-2px, 0); filter: hue-rotate(90deg); }
    97% { transform: translate(2px, 0); filter: hue-rotate(-45deg); }
  }

  /* 色相旋转 footer brand */
  .footer-brand-big {
    animation: hue-drift 8s linear infinite;
  }
  @keyframes hue-drift {
    from { filter: drop-shadow(0 0 20px rgba(135,255,113,0.3)) hue-rotate(0deg); }
    to   { filter: drop-shadow(0 0 20px rgba(135,255,113,0.3)) hue-rotate(60deg); }
  }
}

/* ── 响应式 ── */
@media (max-width: 900px) {
  .content-wrap.with-sidebar {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
    order: 2;
  }
  .content-article {
    order: 1;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 3rem 0 2rem;
  }
  .hero-media {
    height: 280px;
    width: 100%;
  }
}

@media (max-width: 600px) {
  .site-header {
    bottom: 0;
  }
  .page-main {
    padding-top: 1.25rem;
    padding-bottom: calc(var(--nav-h) + 1.5rem);
  }
  .nav-links a {
    font-size: 0.68rem;
    padding: 0 0.5rem;
  }
  .search-input { width: 90px; }
  .search-input:focus { width: 120px; }
  .hero-section { min-height: auto; }
  .hero-media { height: 220px; }
  .hero-img-wrap.a { width: 70%; }
  .hero-img-wrap.b { width: 60%; }
  .section-cards-list,
  .stories-grid,
  .child-cards-list,
  .tag-stories-list {
    grid-template-columns: 1fr;
  }
  .about-nav-grid { grid-template-columns: 1fr; }
  .story-footer-section { flex-direction: column; align-items: flex-start; }
  .story-nav-links { margin-left: 0; }
  .footer-inner { padding: 2rem 1rem 1rem; }
  h1 { font-size: clamp(1.6rem, 8vw, 2.5rem); }
  .hero-h1 { font-size: clamp(2rem, 10vw, 3.5rem); }
}

/* ── 无障碍焦点 ── */
:focus-visible {
  outline: 2px solid var(--c-green);
  outline-offset: 3px;
  border-radius: 4px;
}