:root {
  --primary: #7c9a6d;
  --primary-light: #a3c293;
  --primary-dark: #5a7550;
  --accent: #e8a87c;
  --accent-light: #f0c9a8;
  --bg: #f7f9f5;
  --bg-alt: #eef3ea;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --surface-glass-border: rgba(255, 255, 255, 0.5);
  --text: #2d3a28;
  --text-secondary: #5c6b55;
  --text-muted: #8a9683;
  --border: #dde5d8;
  --shadow-sm: 0 2px 8px rgba(60, 80, 50, 0.06);
  --shadow-md: 0 8px 24px rgba(60, 80, 50, 0.1);
  --shadow-lg: 0 16px 48px rgba(60, 80, 50, 0.14);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1160px;
  --header-height: 68px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --primary: #8fb87c;
    --primary-light: #a8cc96;
    --primary-dark: #6d9a5c;
    --accent: #e8a87c;
    --accent-light: #c98d66;
    --bg: #141a12;
    --bg-alt: #1a2217;
    --surface: #1e271b;
    --surface-glass: rgba(30, 39, 27, 0.75);
    --surface-glass-border: rgba(143, 184, 124, 0.18);
    --text: #e4ecdf;
    --text-secondary: #b4c2ac;
    --text-muted: #7d8c75;
    --border: #2e3a28;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image: radial-gradient(
      circle at 12% 8%,
      rgba(124, 154, 109, 0.1) 0%,
      transparent 42%
    ),
    radial-gradient(
      circle at 88% 92%,
      rgba(232, 168, 124, 0.08) 0%,
      transparent 40%
    );
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  position: relative;
  padding-bottom: 0.6rem;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text);
}

p {
  color: var(--text-secondary);
}

/* ===== Header ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--surface-glass-border);
  box-shadow: var(--shadow-sm);
}

header > div {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

header > div > a[href="#top"] {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  background: linear-gradient(120deg, var(--primary-dark), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
  transition: transform var(--transition), filter var(--transition);
}

header > div > a[href="#top"]:hover {
  transform: scale(1.05);
  filter: brightness(1.1);
}

header nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

header nav ul li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  transition: background var(--transition), color var(--transition),
    transform var(--transition);
}

header nav ul li a:hover,
header nav ul li a:focus-visible {
  background: rgba(124, 154, 109, 0.14);
  color: var(--primary-dark);
  transform: translateY(-1px);
}

/* ===== Main layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
}

main > section,
main > nav {
  margin-top: 48px;
  animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@supports (animation-timeline: view()) {
  main > section,
  main > nav {
    animation: fadeUp linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 40%;
  }
}

main > section > p,
main > section > h2 + p {
  margin-top: 16px;
}

main > section > h3 {
  margin-top: 28px;
  margin-bottom: 12px;
}

main > section > ul,
main > section > ol {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

main > section > ul > li,
main > section > ol > li {
  position: relative;
  padding: 12px 18px 12px 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

main > section > ul > li::before,
main > section > ol > li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  transform: translateY(-50%);
}

main > section > ol {
  counter-reset: step;
}

main > section > ol > li {
  counter-increment: step;
  padding-left: 52px;
}

main > section > ol > li::before {
  content: counter(step);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  left: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

main > section > ul > li:hover,
main > section > ol > li:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

/* ===== Hero ===== */
main > section:first-of-type {
  position: relative;
  margin-top: 32px;
  padding: clamp(36px, 6vw, 72px) clamp(24px, 5vw, 56px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(
    135deg,
    rgba(124, 154, 109, 0.92) 0%,
    rgba(90, 117, 80, 0.88) 45%,
    rgba(232, 168, 124, 0.85) 100%
  );
  box-shadow: var(--shadow-lg);
  color: #fff;
  isolation: isolate;
}

main > section:first-of-type::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(
      circle at 18% 20%,
      rgba(255, 255, 255, 0.28) 0%,
      transparent 45%
    ),
    radial-gradient(
      circle at 82% 78%,
      rgba(255, 255, 255, 0.18) 0%,
      transparent 40%
    );
  pointer-events: none;
}

main > section:first-of-type::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  right: -80px;
  top: -80px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  z-index: -1;
  animation: floatBlob 12s ease-in-out infinite;
}

@keyframes floatBlob {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-24px, 24px) scale(1.08);
  }
}

main > section:first-of-type h1 {
  color: #fff;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
  max-width: 900px;
}

main > section:first-of-type p {
  color: rgba(255, 255, 255, 0.92);
  margin-top: 18px;
  max-width: 820px;
  font-size: 1.02rem;
}

main > section:first-of-type > a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  margin-right: 14px;
  padding: 13px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--primary-dark);
  background: #fff;
  border-radius: var(--radius-pill);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.16);
  transition: transform var(--transition), box-shadow var(--transition),
    background var(--transition);
}

main > section:first-of-type > a:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.24);
  background: var(--accent-light);
  color: var(--text);
}

main > section:first-of-type > a:last-of-type {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: none;
}

main > section:first-of-type > a:last-of-type:hover {
  background: rgba(255, 255, 255, 0.28);
  color: #fff;
}

/* ===== 站内导航 ===== */
main > nav {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--surface-glass-border);
  box-shadow: var(--shadow-sm);
}

main > nav h2 {
  font-size: 1.15rem;
  margin-bottom: 18px;
}

main > nav h2::after {
  width: 40px;
  height: 3px;
}

main > nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

main > nav ul li a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

main > nav ul li a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== 通用 section 卡片化 ===== */
main > section:not(:first-of-type) {
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}

main > section:not(:first-of-type):hover {
  box-shadow: var(--shadow-md);
}

main > section:not(:first-of-type) > h2 {
  margin-bottom: 20px;
}

/* ===== dl 定义列表 ===== */
dl {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

dl dt {
  font-weight: 700;
  color: var(--primary-dark);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

dl dd {
  margin: 0 0 4px;
  padding: 12px 18px;
  background: var(--bg-alt);
  border-left: 3px solid var(--primary);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: border-color var(--transition), background var(--transition);
}

dl dd:hover {
  border-left-color: var(--accent);
  background: var(--surface);
}

/* ===== blockquote 评价 ===== */
blockquote {
  position: relative;
  margin-top: 16px;
  padding: 20px 24px 20px 56px;
  background: linear-gradient(
    135deg,
    rgba(124, 154, 109, 0.08),
    rgba(232, 168, 124, 0.08)
  );
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 18px;
  top: 6px;
  font-size: 3.4rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: var(--primary-light);
  opacity: 0.7;
}

blockquote p {
  font-style: italic;
  color: var(--text-secondary);
  margin: 0;
}

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

/* ===== 新闻列表 ===== */
#news > ul {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

#news > ul > li {
  padding: 22px 24px;
  padding-left: 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition);
}

#news > ul > li::before {
  display: none;
}

#news > ul > li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

#news > ul > li h3 {
  font-size: 1.08rem;
  margin-bottom: 6px;
  color: var(--primary-dark);
}

#news > ul > li p {
  font-size: 0.9rem;
  margin-top: 2px;
}

#news > ul > li p:first-of-type {
  color: var(--text-muted);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
}

/* ===== 技术文章 ===== */
#articles > article {
  margin-top: 18px;
  padding: 24px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--transition), box-shadow var(--transition),
    border-color var(--transition), background var(--transition);
}

#articles > article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
  background: var(--surface);
}

#articles > article h3 {
  font-size: 1.12rem;
  margin-bottom: 8px;
  color: var(--primary-dark);
  transition: color var(--transition);
}

#articles > article:hover h3 {
  color: var(--accent);
}

#articles > article p {
  font-size: 0.92rem;
}

#articles > article p:first-of-type {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 8px;
}

#articles > article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  padding: 7px 18px;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--primary-dark);
  background: rgba(124, 154, 109, 0.12);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

#articles > article a::after {
  content: "\2192";
  transition: transform var(--transition);
}

#articles > article a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  box-shadow: var(--shadow-sm);
}

#articles > article a:hover::after {
  transform: translateX(4px);
}

/* ===== 文章详情 section ===== */
main > section[id^="article-"] {
  background: var(--surface);
}

main > section[id^="article-"] > p:first-of-type {
  color: var(--text-muted);
  font-size: 0.84rem;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--border);
  margin-bottom: 18px;
}

main > section[id^="article-"] > p {
  margin-top: 14px;
  font-size: 0.98rem;
}

main > section[id^="article-"] > p > a {
  display: inline-block;
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary-dark);
  background: rgba(124, 154, 109, 0.12);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

main > section[id^="article-"] > p > a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
}

/* ===== FAQ details ===== */
#faq details {
  margin-top: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

#faq details[open] {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

#faq details summary {
  position: relative;
  padding: 18px 52px 18px 22px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition), background var(--transition);
  -webkit-user-select: none;
  user-select: none;
}

#faq details summary::-webkit-details-marker {
  display: none;
}

#faq details summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--primary-dark);
  background: rgba(124, 154, 109, 0.14);
  border-radius: 50%;
  transition: transform var(--transition), background var(--transition),
    color var(--transition);
}

#faq details[open] summary::after {
  content: "\2212";
  transform: translateY(-50%) rotate(180deg);
  color: #fff;
  background: var(--primary);
}

#faq details summary:hover {
  color: var(--primary-dark);
  background: rgba(124, 154, 109, 0.06);
}

#faq details p {
  padding: 0 22px 20px;
  font-size: 0.94rem;
  animation: fadeUp 0.4s ease both;
}

/* ===== HowTo ===== */
#howto h3 {
  margin-top: 24px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
}

#howto ol > li:hover::before {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
}

/* ===== 联系我们 ===== */
#contact dl {
  grid-template-columns: 1fr;
}

/* ===== 网站地图 / 友情链接 ===== */
#sitemap ul,
main > section[aria-labelledby="links-title"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#sitemap ul > li,
main > section[aria-labelledby="links-title"] ul > li {
  padding: 0;
  background: none;
  border: none;
  box-shadow: none;
}

#sitemap ul > li::before,
main > section[aria-labelledby="links-title"] ul > li::before {
  display: none;
}

#sitemap ul > li a,
main > section[aria-labelledby="links-title"] ul > li a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}

#sitemap ul > li a:hover,
main > section[aria-labelledby="links-title"] ul > li a:hover {
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--primary-dark));
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== 版权声明 ===== */
main > section[aria-labelledby="legal-title"] h3 {
  margin-top: 22px;
}

main > section[aria-labelledby="legal-title"] h3:first-of-type {
  margin-top: 0;
}

/* ===== Footer ===== */
footer {
  position: relative;
  margin-top: 40px;
  padding: 48px 24px 40px;
  text-align: center;
  background: linear-gradient(
    160deg,
    var(--primary-dark) 0%,
    #3f5637 60%,
    #2d3a28 100%
  );
  color: rgba(255, 255, 255, 0.82);
  overflow: hidden;
}

footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 20% 10%,
    rgba(255, 255, 255, 0.08) 0%,
    transparent 40%
  );
  pointer-events: none;
}

footer > p {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto 10px;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.8;
}

footer > p:first-child {
  font-weight: 600;
  color: #fff;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

footer a {
  color: var(--accent-light);
  transition: color var(--transition), opacity var(--transition);
}

footer a:hover {
  color: #fff;
  opacity: 0.9;
}

footer > p:last-child {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.84rem;
}

/* ===== 响应式 ===== */
@media (max-width: 960px) {
  header > div {
    flex-direction: column;
    height: auto;
    padding: 12px 20px;
    gap: 10px;
  }

  header nav ul {
    justify-content: center;
    gap: 2px;
  }

  header nav ul li a {
    padding: 6px 11px;
    font-size: 0.84rem;
  }

  html {
    scroll-padding-top: 130px;
  }

  main {
    padding: 0 20px 64px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  header > div {
    padding: 10px 16px;
  }

  header > div > a[href="#top"] {
    font-size: 1.2rem;
  }

  header nav ul {
    gap: 0;
  }

  header nav ul li a {
    padding: 5px 9px;
    font-size: 0.78rem;
  }

  main {
    padding: 0 16px 56px;
  }

  main > section,
  main > nav {
    margin-top: 32px;
  }

  main > section:first-of-type {
    margin-top: 20px;
    padding: 32px 22px;
    border-radius: var(--radius-md);
  }

  main > section:first-of-type > a {
    display: block;
    width: 100%;
    margin-right: 0;
    margin-top: 14px;
    text-align: center;
    justify-content: center;
  }

  main > nav {
    padding: 20px;
  }

  main > nav ul {
    gap: 8px;
  }

  main > nav ul li a {
    padding: 6px 14px;
    font-size: 0.82rem;
  }

  main > section:not(:first-of-type) {
    padding: 22px 18px;
    border-radius: var(--radius-md);
  }

  main > section > ul > li,
  main > section > ol > li {
    padding: 11px 14px 11px 38px;
    font-size: 0.92rem;
  }

  main > section > ol > li {
    padding-left: 46px;
  }

  main > section > ul > li::before {
    left: 15px;
    width: 8px;
    height: 8px;
  }

  main > section > ol > li::before {
    left: 13px;
    width: 22px;
    height: 22px;
    font-size: 0.72rem;
  }

  #news > ul > li {
    padding: 18px;
  }

  #articles > article {
    padding: 18px;
  }

  blockquote {
    padding: 18px 18px 18px 48px;
  }

  #faq details summary {
    padding: 15px 46px 15px 16px;
    font-size: 0.92rem;
  }

  #faq details p {
    padding: 0 16px 16px;
    font-size: 0.9rem;
  }

  footer {
    padding: 36px 16px 32px;
  }

  footer > p {
    font-size: 0.82rem;
  }
}

@media (max-width: 380px) {
  header nav ul li a {
    padding: 4px 7px;
    font-size: 0.74rem;
  }
}

/* ===== 无障碍与动效偏好 ===== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

a:focus-visible,
summary:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ===== 打印 ===== */
@media print {
  header,
  footer,
  main > nav,
  main > section:first-of-type > a {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
}