:root {
  --brand-primary: #FF6B35;
  --brand-secondary: #FF9F1C;
  --brand-deep: #E8521A;
  --accent: #2EC4B6;
  --accent-2: #7B61FF;
  --gradient-banner: linear-gradient(135deg, #FF6B35 0%, #FF9F1C 45%, #FFB347 100%);
  --gradient-accent: linear-gradient(135deg, #2EC4B6 0%, #7B61FF 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255, 107, 53, 0.08) 0%, rgba(123, 97, 255, 0.08) 100%);

  --bg: #FFF9F5;
  --bg-alt: #FFFFFF;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #FFFFFF;
  --surface-glass: rgba(255, 255, 255, 0.55);
  --border: rgba(255, 107, 53, 0.14);
  --border-soft: rgba(0, 0, 0, 0.06);

  --text: #1F1B16;
  --text-secondary: #5A5249;
  --text-muted: #8B8178;
  --text-invert: #FFFFFF;

  --shadow-sm: 0 2px 8px rgba(255, 107, 53, 0.08);
  --shadow-md: 0 8px 24px rgba(255, 107, 53, 0.12);
  --shadow-lg: 0 16px 48px rgba(232, 82, 26, 0.16);
  --shadow-glow: 0 0 0 4px rgba(255, 107, 53, 0.12);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition: 0.35s var(--ease);

  --space-xs: 0.5rem;
  --space-sm: 0.875rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;

  --max-width: 1200px;
  --header-height: 68px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14100D;
    --bg-alt: #1C1713;
    --surface: rgba(38, 30, 25, 0.72);
    --surface-solid: #231C17;
    --surface-glass: rgba(48, 38, 31, 0.55);
    --border: rgba(255, 159, 28, 0.18);
    --border-soft: rgba(255, 255, 255, 0.08);

    --text: #F5EDE6;
    --text-secondary: #C9BEB4;
    --text-muted: #93887D;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
    --shadow-glow: 0 0 0 4px rgba(255, 107, 53, 0.22);

    --gradient-soft: linear-gradient(135deg, rgba(255, 107, 53, 0.14) 0%, rgba(123, 97, 255, 0.14) 100%);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image: radial-gradient(circle at 12% 8%, rgba(255, 107, 53, 0.10), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(123, 97, 255, 0.10), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(46, 196, 182, 0.08), transparent 45%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--brand-deep);
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

a:hover {
  color: var(--brand-primary);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  padding-left: 1.25rem;
}

::selection {
  background: rgba(255, 107, 53, 0.28);
  color: var(--text);
}

/* ===== Header ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-glass);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--border-soft);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.4) inset;
  animation: slideDown 0.6s var(--ease) both;
}

header nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header nav > a[aria-label="西瓜视频首页"] {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-invert);
  padding: 0.4rem 1.1rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-banner);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

header nav > a[aria-label="西瓜视频首页"]::before {
  content: "";
  width: 1.1em;
  height: 1.1em;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff 0 18%, transparent 19%),
    conic-gradient(from 0deg, #2E8B57, #3CB371, #2E8B57);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.55);
  flex-shrink: 0;
}

header nav > a[aria-label="西瓜视频首页"]:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-md);
  color: var(--text-invert);
}

header nav ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}

header nav ul li a {
  display: inline-block;
  padding: 0.45rem 0.85rem;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

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

header nav ul li a:hover {
  color: var(--brand-deep);
  background: rgba(255, 107, 53, 0.08);
  transform: translateY(-1px);
}

header nav ul li a:hover::after {
  width: 55%;
}

/* ===== Breadcrumb ===== */
nav[aria-label="面包屑"] {
  max-width: var(--max-width);
  margin: 1.25rem auto 0;
  padding: 0 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  animation: fadeUp 0.7s var(--ease) both;
}

nav[aria-label="面包屑"] a {
  color: var(--text-secondary);
}

nav[aria-label="面包屑"] a:hover {
  color: var(--brand-primary);
}

nav[aria-label="面包屑"] span {
  color: var(--brand-deep);
  font-weight: 600;
}

/* ===== Main layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

main > section {
  margin-top: var(--space-lg);
  padding: clamp(1.5rem, 4vw, 2.75rem);
  background: var(--surface);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  animation: fadeUp 0.8s var(--ease) both;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}

main > section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-soft);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

main > section:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

main > section:hover::before {
  opacity: 1;
}

main > section > * {
  position: relative;
  z-index: 1;
}

/* staggered reveal */
main > section:nth-of-type(1) { animation-delay: 0.05s; }
main > section:nth-of-type(2) { animation-delay: 0.10s; }
main > section:nth-of-type(3) { animation-delay: 0.15s; }
main > section:nth-of-type(4) { animation-delay: 0.20s; }
main > section:nth-of-type(5) { animation-delay: 0.25s; }
main > section:nth-of-type(6) { animation-delay: 0.30s; }
main > section:nth-of-type(7) { animation-delay: 0.35s; }
main > section:nth-of-type(8) { animation-delay: 0.40s; }
main > section:nth-of-type(9) { animation-delay: 0.45s; }
main > section:nth-of-type(10) { animation-delay: 0.50s; }
main > section:nth-of-type(11) { animation-delay: 0.55s; }
main > section:nth-of-type(12) { animation-delay: 0.60s; }

/* ===== Hero / intro ===== */
#intro {
  background: var(--gradient-banner);
  color: var(--text-invert);
  border: none;
  box-shadow: var(--shadow-lg);
  padding: clamp(2rem, 6vw, 4rem);
  text-align: center;
}

#intro::before {
  background: radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.28), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(255, 255, 255, 0.18), transparent 50%);
  opacity: 1;
}

#intro::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.5;
  pointer-events: none;
}

#intro h1 {
  color: var(--text-invert);
  font-size: clamp(1.6rem, 4.2vw, 2.9rem);
  line-height: 1.28;
  margin: 0 0 1rem;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
  animation: fadeUp 0.9s var(--ease) both;
}

#intro p {
  max-width: 760px;
  margin: 0 auto 2rem;
  font-size: clamp(0.95rem, 1.6vw, 1.1rem);
  color: rgba(255, 255, 255, 0.94);
  animation: fadeUp 1s var(--ease) 0.1s both;
}

#intro figure {
  margin: 0 auto;
  max-width: 820px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  animation: floatIn 1.1s var(--ease) 0.2s both;
  transition: transform var(--transition), box-shadow var(--transition);
}

#intro figure:hover {
  transform: translateY(-6px) scale(1.012);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.34);
}

#intro figure img {
  width: 100%;
  border-radius: var(--radius-lg);
}

#intro figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(0, 0, 0, 0.18);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  text-align: center;
}

/* ===== Headings ===== */
h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  line-height: 1.35;
  margin: 0 0 1.25rem;
  color: var(--text);
  position: relative;
  padding-bottom: 0.65rem;
  letter-spacing: 0.3px;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: var(--gradient-banner);
  transition: width var(--transition);
}

main > section:hover h2::after {
  width: 96px;
}

h3 {
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  line-height: 1.45;
  margin: 1.6rem 0 0.6rem;
  color: var(--text);
  letter-spacing: 0.2px;
}

h4 {
  font-size: 1rem;
  margin: 1.2rem 0 0.5rem;
  color: var(--brand-deep);
  letter-spacing: 0.3px;
}

p {
  margin: 0 0 0.9rem;
  color: var(--text-secondary);
}

main > section > p:last-child {
  margin-bottom: 0;
}

/* ===== Products / solutions cards feel ===== */
#products h3,
#solutions h3,
#scenarios h3,
#cases h3 {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  color: var(--brand-deep);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

#products h3:hover,
#solutions h3:hover,
#scenarios h3:hover,
#cases h3:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== Blockquote ===== */
blockquote {
  margin: 1.1rem 0;
  padding: 1.1rem 1.4rem;
  position: relative;
  background: var(--surface-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-left: 4px solid var(--brand-primary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-style: normal;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  top: -0.4rem;
  left: 0.7rem;
  font-size: 3rem;
  line-height: 1;
  color: var(--brand-primary);
  opacity: 0.28;
  font-family: Georgia, serif;
}

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--accent-2);
}

/* ===== Time ===== */
time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding: 0.15rem 0.7rem;
  border-radius: var(--radius-pill);
  background: var(--gradient-soft);
  border: 1px solid var(--border-soft);
  letter-spacing: 0.3px;
}

/* ===== News & article cards ===== */
#news article,
#articles article {
  position: relative;
  padding: 1.15rem 1.35rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-solid);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: hidden;
}

#news article::after,
#articles article::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-banner);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

#news article:hover::after,
#articles article:hover::after {
  transform: scaleY(1);
}

#news article h3,
#articles article h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--text);
  transition: color var(--transition);
}

#news article:hover h3,
#articles article:hover h3 {
  color: var(--brand-deep);
}

#news article p,
#articles article p {
  margin: 0 0 0.5rem;
  font-size: 0.92rem;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-primary);
  padding: 0.25rem 0.85rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 53, 0.1);
  transition: background var(--transition), transform var(--transition), color var(--transition);
}

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

#articles article a:hover {
  background: var(--gradient-banner);
  color: var(--text-invert);
  transform: translateX(2px);
}

#articles article a:hover::after {
  transform: translateX(3px);
}

/* ===== FAQ ===== */
#faq h3 {
  margin: 1.1rem 0 0.35rem;
  font-size: 1rem;
  color: var(--text);
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-solid);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  cursor: default;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), color var(--transition);
  position: relative;
  padding-left: 2.4rem;
}

#faq h3::before {
  content: "Q";
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.35rem;
  height: 1.35rem;
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-invert);
  border-radius: 50%;
  background: var(--gradient-banner);
  box-shadow: var(--shadow-sm);
}

#faq h3:hover {
  background: var(--gradient-soft);
  color: var(--brand-deep);
  transform: translateX(3px);
  box-shadow: var(--shadow-md);
}

#faq h3 + p {
  margin: 0 0 0.9rem;
  padding: 0 1rem 0 2.4rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

/* ===== HowTo ===== */
#howto ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
  margin: 1rem 0;
  display: grid;
  gap: 0.75rem;
}

#howto ol li {
  counter-increment: step;
  position: relative;
  padding: 0.85rem 1rem 0.85rem 3.2rem;
  border-radius: var(--radius-md);
  background: var(--surface-solid);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
  color: var(--text-secondary);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-invert);
  border-radius: 50%;
  background: var(--gradient-accent);
  box-shadow: var(--shadow-sm);
}

#howto ol li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

/* ===== Sitemap & links lists ===== */
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

#sitemap ul li a,
#links ul li a {
  display: inline-block;
  padding: 0.45rem 1.05rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface-solid);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-sm);
  transition: color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  color: var(--text-invert);
  background: var(--gradient-banner);
  border-color: transparent;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ===== Contact ===== */
#contact p {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.9rem;
  margin: 0 0 0.6rem;
  border-radius: var(--radius-md);
  background: var(--surface-solid);
  border: 1px solid var(--border-soft);
  font-size: 0.92rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

#contact p::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gradient-banner);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.16);
}

/* ===== Footer ===== */
footer {
  margin-top: var(--space-xl);
  padding: 3rem 1.5rem 2rem;
  background: linear-gradient(180deg, transparent 0%, rgba(255, 107, 53, 0.06) 100%);
  border-top: 1px solid var(--border-soft);
  text-align: center;
}

footer > p {
  max-width: var(--max-width);
  margin: 0 auto 0.6rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

footer > p a {
  color: var(--text-secondary);
  margin: 0 0.35rem;
  position: relative;
}

footer > p a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1.5px;
  background: var(--gradient-banner);
  transition: width var(--transition);
}

footer > p a:hover {
  color: var(--brand-primary);
}

footer > p a:hover::after {
  width: 100%;
}

footer section {
  max-width: var(--max-width);
  margin: 1.5rem auto 0;
  padding: 1.1rem 1.4rem;
  text-align: left;
  background: var(--surface);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

footer section:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

footer section h3 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  color: var(--brand-deep);
}

footer section p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg);
}

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

/* ===== Animations ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(32px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --max-width: 960px;
  }

  header nav ul li a {
    padding: 0.4rem 0.65rem;
    font-size: 0.86rem;
  }
}

@media (max-width: 860px) {
  header nav {
    padding: 0.6rem 1rem;
    justify-content: center;
  }

  header nav ul {
    justify-content: center;
    gap: 0.15rem;
    width: 100%;
  }

  header nav ul li a {
    padding: 0.35rem 0.6rem;
    font-size: 0.82rem;
  }

  main {
    padding: 0 1rem 3rem;
  }

  nav[aria-label="面包屑"] {
    padding: 0 1rem;
    margin-top: 1rem;
  }

  main > section {
    margin-top: 1.5rem;
    border-radius: var(--radius-md);
  }

  #intro {
    border-radius: var(--radius-md);
  }
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  header nav > a[aria-label="西瓜视频首页"] {
    font-size: 1.1rem;
    padding: 0.35rem 0.9rem;
  }

  header nav ul {
    gap: 0.1rem;
  }

  header nav ul li a {
    padding: 0.3rem 0.5rem;
    font-size: 0.78rem;
  }

  main > section {
    padding: 1.25rem 1.1rem;
    margin-top: 1.25rem;
  }

  #intro {
    padding: 1.75rem 1.1rem;
  }

  #intro h1 {
    font-size: 1.45rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  h3 {
    font-size: 1rem;
  }

  #news article,
  #articles article {
    padding: 1rem 1.05rem;
  }

  #faq h3 {
    padding-left: 2.2rem;
    font-size: 0.95rem;
  }

  #faq h3 + p {
    padding-left: 2.2rem;
  }

  #howto ol li {
    padding-left: 2.9rem;
    font-size: 0.9rem;
  }

  #sitemap ul,
  #links ul {
    gap: 0.45rem;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 0.4rem 0.85rem;
    font-size: 0.82rem;
  }

  footer {
    padding: 2rem 1rem 1.5rem;
  }

  footer section {
    padding: 0.9rem 1rem;
  }
}

@media (max-width: 380px) {
  header nav ul li a {
    padding: 0.28rem 0.42rem;
    font-size: 0.74rem;
  }

  main > section {
    padding: 1.05rem 0.9rem;
  }
}

/* ===== Motion & print ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  header,
  nav[aria-label="面包屑"],
  footer section,
  #sitemap,
  #links {
    display: none;
  }

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

  main > section {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
    background: #fff;
  }
}