:root {
  --primary: #f06292;
  --primary-dark: #ec407a;
  --primary-light: #f8bbd0;
  --primary-soft: #fce4ec;
  --accent: #7b1fa2;
  --accent-light: #e1bee7;
  --text-main: #2d2d3a;
  --text-sub: #5c5c6e;
  --text-muted: #8a8a9e;
  --bg-body: #fdf7fa;
  --bg-card: #ffffff;
  --bg-elevated: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.62);
  --border-soft: rgba(240, 98, 146, 0.14);
  --border-glass: rgba(255, 255, 255, 0.45);
  --shadow-sm: 0 2px 10px rgba(240, 98, 146, 0.08);
  --shadow-md: 0 8px 28px rgba(240, 98, 146, 0.12);
  --shadow-lg: 0 18px 48px rgba(123, 31, 162, 0.14);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --gradient-hero: linear-gradient(135deg, #fce4ec 0%, #f8bbd0 38%, #e1bee7 72%, #d1c4e9 100%);
  --gradient-accent: linear-gradient(120deg, #f06292 0%, #ba68c8 100%);
  --gradient-soft: linear-gradient(135deg, #fff5f9 0%, #f3e5f5 100%);
  --transition-fast: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.42s cubic-bezier(0.22, 1, 0.36, 1);
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

[data-theme="dark"],
body.dark-mode {
  --primary: #f48fb1;
  --primary-dark: #f06292;
  --primary-light: #4a2c3a;
  --primary-soft: #2a1a22;
  --accent: #ce93d8;
  --accent-light: #3a2a42;
  --text-main: #f2eaf0;
  --text-sub: #c9bcc6;
  --text-muted: #9a8e98;
  --bg-body: #17121a;
  --bg-card: #211a26;
  --bg-elevated: #2a2130;
  --bg-glass: rgba(42, 33, 48, 0.66);
  --border-soft: rgba(244, 143, 177, 0.16);
  --border-glass: rgba(244, 143, 177, 0.12);
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.5);
  --gradient-hero: linear-gradient(135deg, #2a1a22 0%, #3a2440 40%, #2d1f3a 72%, #241b2e 100%);
  --gradient-soft: linear-gradient(135deg, #211a26 0%, #2a2130 100%);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
button {
  font-size: 1rem;
}

::selection {
  background: var(--primary-light);
  color: var(--primary-dark);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 20px;
  border: 2px solid var(--bg-body);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border-bottom: 1px solid var(--border-glass);
  transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
}

header:hover {
  box-shadow: var(--shadow-sm);
}

header nav {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

header nav > div {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 68px;
  flex-wrap: wrap;
}

header nav > div > a[aria-label="91漫画首页"] {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

header nav > div > a[aria-label="91漫画首页"]:hover {
  transform: scale(1.04);
  filter: brightness(1.1);
}

header nav ul {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  flex-wrap: wrap;
}

header nav ul li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--text-sub);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

header nav ul li a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-smooth);
}

header nav ul li a:hover {
  color: var(--primary-dark);
  background: var(--primary-soft);
  transform: translateY(-1px);
}

header nav ul li a:hover::after {
  width: 60%;
}

header nav form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--bg-card);
  border: 1.5px solid var(--border-soft);
  border-radius: 999px;
  overflow: hidden;
  padding: 3px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

header nav form[role="search"]:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(240, 98, 146, 0.12);
}

header nav form[role="search"] input[type="search"] {
  border: none;
  outline: none;
  background: transparent;
  padding: 8px 16px;
  font-size: 0.9rem;
  color: var(--text-main);
  width: 200px;
  min-width: 120px;
}

header nav form[role="search"] input[type="search"]::placeholder {
  color: var(--text-muted);
}

header nav form[role="search"] button[type="submit"] {
  padding: 8px 20px;
  border-radius: 999px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  transition: filter var(--transition-fast), transform var(--transition-fast);
}

header nav form[role="search"] button[type="submit"]:hover {
  filter: brightness(1.1);
  transform: scale(1.03);
}

header nav > div > button[aria-label="切换暗黑模式"] {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: var(--bg-card);
  border: 1.5px solid var(--border-soft);
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}

header nav > div > button[aria-label="切换暗黑模式"]:hover {
  transform: rotate(-20deg) scale(1.1);
  background: var(--primary-soft);
  box-shadow: var(--shadow-sm);
}

main {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px 60px;
}

section {
  margin-bottom: 64px;
  scroll-margin-top: 90px;
}

section > h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 20px;
  position: relative;
  padding-left: 18px;
  line-height: 1.35;
  color: var(--text-main);
}

section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: 6px;
  background: var(--gradient-accent);
}

section > h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-main);
  letter-spacing: -0.2px;
  display: flex;
  align-items: center;
  gap: 8px;
}

section > h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-accent);
  flex-shrink: 0;
}

section > p {
  color: var(--text-sub);
  margin-bottom: 14px;
  font-size: 1rem;
}

section > p a {
  font-weight: 600;
  border-bottom: 1.5px dashed var(--primary-light);
}

section > p a:hover {
  border-bottom-color: var(--primary-dark);
}

#hero {
  position: relative;
  margin: 32px 0 64px;
  padding: 56px 40px 48px;
  border-radius: var(--radius-xl);
  background: var(--gradient-hero);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.55), transparent 70%);
  z-index: -1;
  animation: floatBlob 9s ease-in-out infinite;
}

#hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: -70px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(206, 147, 216, 0.45), transparent 70%);
  z-index: -1;
  animation: floatBlob 12s ease-in-out infinite reverse;
}

@keyframes floatBlob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(24px, -18px) scale(1.08); }
}

#hero h1 {
  font-size: clamp(1.7rem, 4.4vw, 2.9rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -1px;
  color: #7b1fa2;
  margin-bottom: 18px;
  text-shadow: 0 2px 12px rgba(255, 255, 255, 0.5);
}

[data-theme="dark"] #hero h1,
body.dark-mode #hero h1 {
  color: #f8bbd0;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
}

#hero > p {
  font-size: 1.05rem;
  color: #6a1b6a;
  max-width: 760px;
  margin-bottom: 28px;
  line-height: 1.8;
}

[data-theme="dark"] #hero > p,
body.dark-mode #hero > p {
  color: #e1bee7;
}

#hero > div:first-of-type {
  margin-bottom: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

#hero > div:first-of-type:hover {
  transform: translateY(-4px) scale(1.005);
  box-shadow: var(--shadow-lg);
}

#hero > div:first-of-type img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

#hero > div:nth-of-type(2) {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

#hero > div:nth-of-type(2) article {
  background: var(--bg-glass);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), background var(--transition-smooth);
}

#hero > div:nth-of-type(2) article:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
}

#hero > div:nth-of-type(2) article h2 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 6px;
}

#hero > div:nth-of-type(2) article p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.6;
}

#hero > p:last-of-type {
  font-size: 0.98rem;
  color: #6a1b6a;
  font-weight: 500;
  margin-bottom: 0;
}

[data-theme="dark"] #hero > p:last-of-type,
body.dark-mode #hero > p:last-of-type {
  color: #e1bee7;
}

#hero > p:last-of-type span {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--primary-dark);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  padding: 0 2px;
}

nav[aria-label="面包屑"] {
  margin: 0 0 40px;
}

nav[aria-label="面包屑"] ol {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑"] ol li {
  display: flex;
  align-items: center;
  gap: 6px;
}

nav[aria-label="面包屑"] ol li + li::before {
  content: "›";
  color: var(--primary-light);
  font-size: 1.1rem;
  margin-right: 2px;
}

nav[aria-label="面包屑"] ol li a {
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

nav[aria-label="面包屑"] ol li a:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
  transform: translateY(-1px);
}

#brand,
#products,
#solutions,
#cases,
#articles,
#howto,
#faq,
#knowledge,
#contact,
#sitemap {
  background: var(--bg-card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-smooth), transform var(--transition-smooth), background var(--transition-smooth);
}

#brand:hover,
#products:hover,
#solutions:hover,
#cases:hover,
#articles:hover,
#howto:hover,
#faq:hover,
#knowledge:hover,
#contact:hover,
#sitemap:hover {
  box-shadow: var(--shadow-md);
}

#brand ul,
#products ul,
#howto ul,
#howto ol,
#sitemap ul {
  margin: 14px 0 0;
  display: grid;
  gap: 10px;
}

#brand ul li,
#products ul li,
#howto ul li,
#sitemap ul li {
  position: relative;
  padding: 12px 16px 12px 44px;
  background: var(--gradient-soft);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-sub);
  border: 1px solid var(--border-soft);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#brand ul li::before,
#products ul li::before,
#howto ul li::before,
#sitemap ul li::before {
  content: "✦";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 0.9rem;
}

#brand ul li:hover,
#products ul li:hover,
#howto ul li:hover,
#sitemap ul li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
}

#howto ol {
  counter-reset: step;
}

#howto ol li {
  position: relative;
  padding: 14px 18px 14px 52px;
  background: var(--gradient-soft);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-soft);
  color: var(--text-sub);
  font-size: 0.95rem;
  counter-increment: step;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(240, 98, 146, 0.35);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
}

#cases blockquote {
  position: relative;
  margin: 18px 0;
  padding: 22px 24px 22px 56px;
  background: var(--gradient-soft);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  color: var(--text-sub);
  font-size: 0.96rem;
  line-height: 1.8;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

#cases blockquote::before {
  content: "“";
  position: absolute;
  left: 18px;
  top: 8px;
  font-size: 3rem;
  font-family: Georgia, serif;
  color: var(--primary-light);
  line-height: 1;
}

#cases blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#articles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  align-items: start;
}

#articles > h2 {
  grid-column: 1 / -1;
}

#articles > p {
  grid-column: 1 / -1;
  margin-bottom: 8px;
}

#articles article {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 22px;
  background: var(--gradient-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

#articles article::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  z-index: 0;
}

#articles article > * {
  position: relative;
  z-index: 1;
}

#articles article:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

#articles article:hover::before {
  opacity: 0.06;
}

#articles article h3 {
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-main);
  margin: 0;
  display: block;
}

#articles article h3::before {
  display: none;
}

#articles article time {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.3px;
}

#articles article p {
  font-size: 0.9rem;
  color: var(--text-sub);
  line-height: 1.75;
  margin: 0;
  flex: 1;
}

#articles article a {
  align-self: flex-start;
  padding: 8px 20px;
  border-radius: 999px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

#articles article a:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 18px rgba(240, 98, 146, 0.35);
  filter: brightness(1.08);
  color: #fff;
}

#faq details {
  background: var(--gradient-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth), transform var(--transition-fast);
}

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

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

#faq details summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 52px 18px 22px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-main);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast);
  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;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-smooth), background var(--transition-fast), color var(--transition-fast);
}

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

#faq details summary:hover {
  color: var(--primary-dark);
}

#faq details p {
  padding: 0 22px 20px;
  font-size: 0.93rem;
  color: var(--text-sub);
  line-height: 1.8;
  animation: faqFade 0.35s ease;
}

@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#contact address {
  font-style: normal;
  display: grid;
  gap: 12px;
  margin: 20px 0 24px;
  padding: 24px 26px;
  background: var(--gradient-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-soft);
}

#contact address p {
  font-size: 0.95rem;
  color: var(--text-sub);
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

#contact address p a {
  font-weight: 600;
  color: var(--primary-dark);
  border-bottom: 1.5px dashed var(--primary-light);
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

#contact address p a:hover {
  border-bottom-color: var(--primary-dark);
  color: var(--accent);
}

#sitemap > ul {
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
}

#sitemap > h3 + ul {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}

#sitemap ul li a {
  color: var(--text-sub);
  font-weight: 500;
  display: block;
}

#sitemap ul li a:hover {
  color: var(--primary-dark);
}

footer {
  background: var(--gradient-soft);
  border-top: 1px solid var(--border-soft);
  padding: 48px 24px 32px;
  margin-top: 40px;
  position: relative;
}

footer > section {
  max-width: 1240px;
  margin: 0 auto 28px;
  padding: 0;
  background: none;
  border: none;
  box-shadow: none;
}

footer > section:hover {
  box-shadow: none;
}

footer > section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-main);
  padding-left: 14px;
}

footer > section h2::before {
  width: 5px;
}

footer > section p {
  font-size: 0.88rem;
  color: var(--text-sub);
  line-height: 1.8;
  margin-bottom: 8px;
  max-width: 900px;
}

footer > section p a {
  color: var(--primary-dark);
  border-bottom: 1.5px dashed var(--primary-light);
}

footer > section p a:hover {
  border-bottom-color: var(--primary-dark);
}

footer > p {
  max-width: 1240px;
  margin: 0 auto 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

footer > button[aria-label="返回顶部"] {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 900;
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

footer > button[aria-label="返回顶部"]:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.08);
}

footer > button[aria-label="返回顶部"]:active {
  transform: translateY(-1px) scale(0.98);
}

@media (prefers-reduced-motion: no-preference) {
  #hero,
  section,
  #articles article,
  #faq details,
  #cases blockquote,
  #hero > div:nth-of-type(2) article {
    animation: fadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
  }

  #hero { animation-delay: 0.05s; }
  section { animation-delay: 0.1s; }
}

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

@media (max-width: 900px) {
  header nav > div {
    min-height: 60px;
    gap: 12px;
  }

  header nav ul {
    order: 3;
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  header nav ul::-webkit-scrollbar {
    display: none;
  }

  header nav ul li a {
    white-space: nowrap;
    padding: 7px 12px;
    font-size: 0.88rem;
  }

  header nav form[role="search"] {
    order: 2;
    flex: 1;
    min-width: 0;
  }

  header nav form[role="search"] input[type="search"] {
    width: 100%;
    min-width: 0;
  }

  header nav > div > button[aria-label="切换暗黑模式"] {
    order: 2;
    width: 38px;
    height: 38px;
  }

  #hero {
    padding: 40px 24px 36px;
    margin: 20px 0 48px;
    border-radius: var(--radius-lg);
  }

  #hero > div:nth-of-type(2) {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #articles,
  #howto,
  #faq,
  #knowledge,
  #contact,
  #sitemap {
    padding: 28px 22px;
    border-radius: var(--radius-md);
  }

  #articles {
    grid-template-columns: 1fr;
  }

  section {
    margin-bottom: 48px;
  }

  footer > button[aria-label="返回顶部"] {
    right: 16px;
    bottom: 20px;
    padding: 10px 16px;
    font-size: 0.8rem;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }

  main {
    padding: 0 16px 40px;
  }

  header nav {
    padding: 0 16px;
  }

  header nav > div > a[aria-label="91漫画首页"] {
    font-size: 1.25rem;
  }

  header nav form[role="search"] button[type="submit"] {
    padding: 8px 14px;
    font-size: 0.82rem;
  }

  #hero {
    padding: 32px 18px 28px;
    border-radius: var(--radius-md);
  }

  #hero h1 {
    font-size: 1.55rem;
  }

  #hero > p {
    font-size: 0.94rem;
  }

  #hero > div:nth-of-type(2) {
    grid-template-columns: 1fr;
  }

  #hero > div:nth-of-type(2) article {
    padding: 16px 14px;
  }

  #hero > p:last-of-type span {
    font-size: 1.1rem;
  }

  section > h2 {
    font-size: 1.35rem;
    padding-left: 14px;
  }

  section > h3 {
    font-size: 1.05rem;
  }

  #brand,
  #products,
  #solutions,
  #cases,
  #articles,
  #howto,
  #faq,
  #knowledge,
  #contact,
  #sitemap {
    padding: 22px 16px;
  }

  #brand ul li,
  #products ul li,
  #howto ul li,
  #sitemap ul li {
    padding: 10px 12px 10px 38px;
    font-size: 0.9rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 46px;
    font-size: 0.9rem;
  }

  #articles article {
    padding: 20px 16px;
  }

  #cases blockquote {
    padding: 18px 16px 18px 46px;
    font-size: 0.9rem;
  }

  #contact address {
    padding: 18px 16px;
  }

  #contact address p {
    font-size: 0.88rem;
  }

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

  #faq details p {
    padding: 0 16px 16px;
    font-size: 0.88rem;
  }

  #sitemap > ul,
  #sitemap > h3 + ul {
    grid-template-columns: 1fr;
  }

  footer {
    padding: 32px 16px 24px;
  }

  footer > p {
    font-size: 0.76rem;
  }
}

@media (hover: none) {
  header nav ul li a:hover,
  #hero > div:nth-of-type(2) article:hover,
  #articles article:hover,
  #brand ul li:hover,
  #products ul li:hover,
  #howto ul li:hover,
  #howto ol li:hover,
  #sitemap ul li:hover {
    transform: none;
  }
}

@media print {
  header,
  footer > button[aria-label="返回顶部"],
  nav[aria-label="面包屑"] {
    display: none;
  }

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

  section {
    box-shadow: none;
    border: 1px solid #ddd;
  }
}