@import url('https://fonts.googleapis.com/css2?family=Nunito+Sans:wght@300;400;500;600;700&family=Varela+Round&display=swap');

/* ===== 变量 ===== */
:root {
  --mint: #5cc6b0;
  --mint-light: #8fdccc;
  --mint-dark: #3da898;
  --sand: #d4c4a8;
  --sand-light: #ede4d3;
  --sand-dark: #bfad90;
  --forest: #172623;
  --forest-mid: #2d4a42;
  --forest-light: #4a7068;
  --warm-white: #faf8f4;
  --warm-cream: #f5f0e8;
  --text-main: #172623;
  --text-mid: #3d5750;
  --text-soft: #6b8278;
  --text-muted: #9ab0aa;
  --radius-card: 18px;
  --radius-btn: 999px;
  --radius-sm: 8px;
  --shadow-soft: 0 2px 12px rgba(23,38,35,0.08), 0 1px 4px rgba(23,38,35,0.05);
  --shadow-card: 0 4px 20px rgba(23,38,35,0.10), 0 1px 6px rgba(23,38,35,0.06);
  --shadow-hover: 0 8px 32px rgba(23,38,35,0.14), 0 2px 8px rgba(23,38,35,0.08);
  --transition: 0.28s ease-out;
  --font-main: 'Varela Round', 'Nunito Sans', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-body: 'Nunito Sans', 'Varela Round', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --header-h: 64px;
  --anchor-h: 44px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 17px; }
body {
  font-family: var(--font-body);
  background: var(--warm-white);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--mint-dark); text-decoration: none; }
a:hover { color: var(--mint); }
a:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; border-radius: 4px; }
ul, ol { padding-left: 1.4em; }

/* ===== 无障碍 ===== */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; }

/* ===== 站点容器 ===== */
.site-wrap { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,248,244,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sand);
  height: var(--header-h);
  box-shadow: var(--shadow-soft);
}
.header-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-mark { border-radius: 8px; }
.brand-name {
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--forest);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.main-nav { flex: 1; overflow: hidden; }
.nav-pills {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  overflow: hidden;
  max-height: 44px;
}
.nav-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  min-height: 40px;
  border-radius: var(--radius-btn);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-mid);
  background: transparent;
  border: 1.5px solid transparent;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.nav-pill:hover {
  background: var(--sand-light);
  color: var(--forest);
  border-color: var(--sand);
}
.nav-pill--active {
  background: var(--mint);
  color: #fff;
  border-color: var(--mint);
}
.nav-pill--active:hover {
  background: var(--mint-dark);
  border-color: var(--mint-dark);
  color: #fff;
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--forest);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端展开菜单 */
.nav-open .main-nav {
  display: block;
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: var(--warm-white);
  border-bottom: 2px solid var(--sand);
  padding: 16px 24px 20px;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
  z-index: 99;
  box-shadow: var(--shadow-card);
}
.nav-open .nav-pills {
  flex-direction: column;
  align-items: flex-start;
  max-height: none;
  gap: 4px;
}
.nav-open .nav-pill { width: 100%; justify-content: flex-start; }

/* ===== 粘性锚点条 ===== */
.sticky-anchor {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: var(--forest);
  height: var(--anchor-h);
  overflow: hidden;
}
.anchor-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 0;
}
.anchor-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--mint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-right: 20px;
  flex-shrink: 0;
}
.anchor-link {
  display: inline-flex;
  align-items: center;
  height: var(--anchor-h);
  padding: 0 16px;
  font-size: 0.82rem;
  color: var(--sand-light);
  border-right: 1px solid rgba(212,196,168,0.2);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.anchor-link:hover { color: #fff; background: rgba(92,198,176,0.15); }
.anchor-link:first-of-type { border-left: 1px solid rgba(212,196,168,0.2); }

/* ===== Hero (首页) ===== */
.hero {
  min-height: 100vh;
  background: var(--warm-cream);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 70% 50%, rgba(92,198,176,0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 20% 80%, rgba(212,196,168,0.4) 0%, transparent 50%);
  pointer-events: none;
}
.hero-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 80px 24px 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 60px;
  width: 100%;
  position: relative;
  z-index: 1;
}
.hero-text { max-width: 560px; }
.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--mint-dark);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.hero-h1 {
  font-family: var(--font-main);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--forest);
  line-height: 1.3;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 460px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-bg-text {
  position: absolute;
  font-family: var(--font-main);
  font-size: clamp(180px, 25vw, 320px);
  font-weight: 700;
  color: rgba(92,198,176,0.08);
  line-height: 1;
  user-select: none;
  z-index: 0;
  letter-spacing: -0.05em;
}
.hero-img {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-hover);
  width: 100%;
  max-width: 500px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  min-height: 48px;
  border-radius: var(--radius-btn);
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-main);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
  border: none;
}
.btn--primary {
  background: var(--mint);
  color: #fff;
  box-shadow: 0 4px 16px rgba(92,198,176,0.35);
}
.btn--primary:hover {
  background: var(--mint-dark);
  box-shadow: 0 6px 24px rgba(92,198,176,0.45);
  transform: translateY(-1px);
  color: #fff;
}
.btn--ghost {
  background: transparent;
  color: var(--forest);
  border: 2px solid var(--sand-dark);
}
.btn--ghost:hover {
  background: var(--sand-light);
  border-color: var(--sand-dark);
  color: var(--forest);
  transform: translateY(-1px);
}

/* ===== 正文容器 / wrap ===== */
.wrap {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== content-section + article-layout ===== */
.content-section { padding: 56px 0 0; }
.article-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}
.article-layout--faq { grid-template-columns: 220px 1fr; }
.article-layout--about { grid-template-columns: 220px 1fr; }
.article-layout--narrow { grid-template-columns: 200px 1fr; }

/* ===== 侧边栏 aside ===== */
.article-aside {
  position: sticky;
  top: calc(var(--header-h) + var(--anchor-h) + 24px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.aside-box {
  background: var(--warm-cream);
  border-radius: var(--radius-card);
  padding: 20px;
  border: 1px solid var(--sand);
}
.aside-box--cta {
  background: linear-gradient(135deg, var(--forest) 0%, var(--forest-mid) 100%);
  border-color: var(--forest);
}
.aside-box--cta .aside-title { color: var(--mint-light); }
.aside-box--cta a { color: var(--sand-light); }
.aside-box--cta a:hover { color: #fff; }
.aside-box--highlight { background: rgba(92,198,176,0.08); border-color: var(--mint-light); }
.aside-title {
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-soft);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.aside-title span { display: block; }
.article-aside dl { display: flex; flex-direction: column; gap: 4px; }
.article-aside dt { margin: 0; }
.article-aside dd { margin: 0; }
.article-aside a {
  display: block;
  padding: 6px 0;
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.4;
  border-bottom: 1px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.article-aside a:hover { color: var(--mint-dark); border-color: var(--mint-light); }
.aside-link--active { color: var(--mint-dark) !important; font-weight: 600; }

/* ===== 文章主体 ===== */
.article-header { margin-bottom: 32px; }
.breadcrumb {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-soft); }
.breadcrumb a:hover { color: var(--mint-dark); }
.breadcrumb span[aria-hidden] { color: var(--text-muted); }
.article-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--mint-dark);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.article-h1 {
  font-family: var(--font-main);
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--forest);
  line-height: 1.35;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.meta-date {
  font-size: 0.82rem;
  color: var(--text-soft);
  background: var(--sand-light);
  padding: 4px 12px;
  border-radius: var(--radius-btn);
}
.article-hero-wrap {
  margin-bottom: 32px;
  border-radius: var(--radius-card);
  overflow: hidden;
}
.article-hero-img {
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

/* ===== 正文排版 prose ===== */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-main);
}
.prose h2, .prose h3, .prose h4 {
  font-family: var(--font-main);
  color: var(--forest);
  margin-top: 2em;
  margin-bottom: 0.7em;
  line-height: 1.35;
}
.prose h2 { font-size: 1.4rem; }
.prose h3 { font-size: 1.15rem; }
.prose h4 { font-size: 1rem; font-weight: 700; }
.prose p { margin-bottom: 1.1em; }
.prose ul, .prose ol { margin-bottom: 1.1em; }
.prose li { margin-bottom: 0.4em; }
.prose strong { font-weight: 700; color: var(--forest); }
.prose em { font-style: italic; }
.prose blockquote {
  border-left: 4px solid var(--mint);
  padding: 12px 20px;
  margin: 1.5em 0;
  background: rgba(92,198,176,0.07);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-mid);
  font-style: italic;
}
.prose a { color: var(--mint-dark); border-bottom: 1px solid var(--mint-light); transition: color var(--transition); }
.prose a:hover { color: var(--mint); }
.prose img { border-radius: var(--radius-sm); margin: 1.5em 0; box-shadow: var(--shadow-soft); }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: 0.92rem; }
.prose th { background: var(--forest); color: #fff; padding: 10px 14px; text-align: left; font-weight: 600; }
.prose td { padding: 10px 14px; border-bottom: 1px solid var(--sand); }
.prose tr:nth-child(even) td { background: var(--warm-cream); }
.prose code {
  background: var(--sand-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: 'Courier New', monospace;
  color: var(--forest-mid);
}
.prose pre {
  background: var(--forest);
  color: var(--sand-light);
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 1.5em 0;
}
.prose pre code { background: none; color: inherit; padding: 0; }
.prose hr { border: none; border-top: 2px solid var(--sand); margin: 2em 0; }
.prose--legal { font-size: 0.95rem; }
.faq-prose details {
  border: 1px solid var(--sand);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-prose summary {
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 600;
  background: var(--warm-cream);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq-prose summary::-webkit-details-marker { display: none; }
.faq-prose summary::after { content: '＋'; color: var(--mint); font-size: 1.2em; }
.faq-prose details[open] summary::after { content: '－'; }
.faq-prose details > *:not(summary) { padding: 14px 18px; }

/* ===== 区块标题 section-title ===== */
.section-title {
  font-family: var(--font-main);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--forest);
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 28px;
}
.section-title-text { flex: 0 0 auto; }
.section-title-deco {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--mint);
  background: rgba(92,198,176,0.12);
  padding: 3px 10px;
  border-radius: var(--radius-btn);
  text-transform: uppercase;
  align-self: center;
}

/* ===== 卡片 card ===== */
.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 0;
  background: var(--warm-cream);
  border-radius: var(--radius-card);
  border: 1px solid var(--sand);
  border-bottom: 4px solid var(--mint);
  box-shadow: var(--shadow-soft);
  text-decoration: none;
  color: var(--text-main);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
  padding-bottom: 20px;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-bottom-color: var(--mint-dark);
}
.card--feature { border-bottom-color: var(--sand-dark); }
.card--feature:hover { border-bottom-color: var(--forest-light); }
.card-title {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  color: var(--forest);
  line-height: 1.4;
  display: block;
}
.card-desc {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.6;
  display: block;
  flex: 1;
}
.card-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: block;
  margin-top: auto;
  padding-top: 8px;
}

/* ===== 卡片网格 card-grid ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.card-grid--guides { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card-grid--features { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }

/* ===== 各区块间距 ===== */
.section-guides,
.section-features,
.related-section,
.cta-section,
.about-links {
  padding: 56px 0;
}

/* ===== strip 链接块 ===== */
.related-guides-strip { margin-top: 40px; }
.strip-title {
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-mid);
  margin-bottom: 14px;
}
.strip-title span { display: block; }
.strip-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.strip-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  min-height: 44px;
  background: var(--warm-cream);
  border: 1.5px solid var(--sand);
  border-radius: var(--radius-btn);
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition);
}
.strip-link:hover { background: var(--sand-light); border-color: var(--sand-dark); }
.strip-link strong {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--forest);
}

/* ===== About banner ===== */
.about-banner {
  background: linear-gradient(135deg, var(--forest) 0%, var(--forest-mid) 100%);
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}
.about-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(92,198,176,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.about-banner-inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 40px;
  position: relative;
  z-index: 1;
}
.about-eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--mint);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.about-h1 {
  font-family: var(--font-main);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
}
.about-sub {
  font-size: 1rem;
  color: var(--sand-light);
  line-height: 1.7;
  max-width: 520px;
}
.about-banner-img { max-width: 320px; }
.about-hero-img { border-radius: var(--radius-card); box-shadow: var(--shadow-hover); }

/* ===== About links grid ===== */
.about-links-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.about-link-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 20px;
  background: var(--warm-cream);
  border: 1px solid var(--sand);
  border-bottom: 4px solid var(--mint);
  border-radius: var(--radius-card);
  text-decoration: none;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-soft);
}
.about-link-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}
.about-link-card strong { font-size: 1rem; font-weight: 700; color: var(--forest); }
.about-link-card span { font-size: 0.88rem; color: var(--text-mid); line-height: 1.5; }

/* ===== CTA 网格 ===== */
.cta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--forest);
  color: var(--sand-light);
  padding: 60px 0 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  max-width: 100%;
}
.site-footer > * { padding: 0 32px; }
.footer-col {
  padding-bottom: 40px;
}
.footer-col h3 {
  font-family: var(--font-main);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--mint);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer-col h3 span { display: block; }
.footer-col p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(212,196,168,0.8);
  margin-bottom: 12px;
}
.footer-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--mint);
  border-bottom: 1px solid var(--mint-dark);
  transition: color var(--transition);
}
.footer-link:hover { color: var(--mint-light); }
.site-footer nav dl {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.site-footer nav dt { margin: 0; }
.site-footer nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 0.86rem;
  color: rgba(212,196,168,0.75);
  transition: color var(--transition);
  line-height: 1.4;
  padding: 4px 0;
}
.site-footer nav a:hover { color: #fff; }
.footer-bottom {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(212,196,168,0.15);
  padding: 20px 32px;
}
.footer-bottom p {
  font-size: 0.82rem;
  color: rgba(212,196,168,0.5);
  margin: 0;
}
.footer-bottom a {
  color: rgba(212,196,168,0.6);
  transition: color var(--transition);
}
.footer-bottom a:hover { color: var(--mint-light); }

/* ===== Scroll Reveal ===== */
.reveal-section {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 标题装饰 h2>span, h3>span ===== */
.section-title > span,
h2 > span,
h3 > span {
  display: inline;
}
.prose h2 > span,
.prose h3 > span {
  display: inline;
  border-bottom: 2px solid var(--mint-light);
  padding-bottom: 2px;
}

/* ===== @media 移动端 ===== */
@media (max-width: 960px) {
  .site-footer {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: auto auto auto;
  }
  .footer-bottom { grid-column: 1 / -1; }
  .about-links-grid { grid-template-columns: 1fr 1fr; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 40px); }
  .hero-text { max-width: 100%; }
  .hero-bg-text { font-size: 120px; }
  .about-banner-inner { grid-template-columns: 1fr; }
  .about-banner-img { display: none; }
}

@media (max-width: 768px) {
  :root { --header-h: 56px; }
  html { font-size: 16px; }
  .main-nav { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .article-layout,
  .article-layout--faq,
  .article-layout--about,
  .article-layout--narrow {
    grid-template-columns: 1fr;
  }
  .article-aside {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .card-grid,
  .card-grid--guides,
  .card-grid--features,
  .cta-grid { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .section-guides,
  .section-features,
  .related-section,
  .cta-section,
  .about-links { padding: 36px 0; }
  .hero-inner { padding: 60px 20px 40px; }
}

@media (max-width: 480px) {
  .hero-h1 { font-size: 1.5rem; }
  .article-layout { gap: 24px; }
  .article-aside { grid-template-columns: 1fr; }
  .site-footer { grid-template-columns: 1fr; }
  .footer-col { padding: 0 20px 32px; }
  .footer-bottom { padding: 16px 20px; }
  .about-links-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .anchor-inner { gap: 0; overflow-x: auto; }
  .anchor-label { display: none; }
  .wrap { padding: 0 16px; }
  .strip-links { flex-direction: column; }
  .strip-link { width: 100%; }
}

/* ===== prefers-reduced-motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal-section {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ===== 纹理装饰 ===== */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  opacity: 0.4;
  z-index: 0;
}