:root {
  --peach-50: #fff5f7;
  --peach-100: #ffe3e8;
  --peach-200: #ffc9d4;
  --peach-300: #ff9fb2;
  --peach-400: #ff6b81;
  --peach-500: #f04a68;
  --peach-600: #d6336c;
  --peach-700: #a61e4d;
  --peach-800: #7a1538;
  --peach-900: #4d0e23;

  --ink-900: #1a1017;
  --ink-800: #2b1b26;
  --ink-700: #3d2836;
  --ink-600: #55404f;
  --ink-500: #6f5a68;
  --ink-400: #8f7c89;
  --ink-300: #b3a3ad;
  --ink-200: #d6ccd2;
  --ink-100: #ece6e9;
  --ink-50: #f7f4f5;

  --mint: #0ca678;
  --mint-soft: #e6fcf5;
  --blue: #1c7ed6;
  --blue-soft: #e3f0ff;
  --amber: #f59f00;

  --bg: #fdf7f9;
  --bg-alt: #ffffff;
  --bg-elev: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.55);
  --border: rgba(214, 51, 108, 0.14);
  --border-strong: rgba(214, 51, 108, 0.28);
  --text: #2b1b26;
  --text-soft: #6f5a68;
  --text-mute: #8f7c89;
  --shadow-sm: 0 2px 8px rgba(166, 30, 77, 0.06);
  --shadow-md: 0 8px 24px rgba(166, 30, 77, 0.09);
  --shadow-lg: 0 18px 44px rgba(166, 30, 77, 0.13);
  --shadow-glow: 0 0 0 3px rgba(255, 107, 129, 0.18);

  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-xl: 34px;
  --radius-pill: 999px;

  --grad-brand: linear-gradient(135deg, #ff9fb2 0%, #ff6b81 42%, #d6336c 100%);
  --grad-brand-soft: linear-gradient(135deg, #fff5f7 0%, #ffe3e8 55%, #ffc9d4 100%);
  --grad-mint: linear-gradient(135deg, #63e6be 0%, #0ca678 100%);
  --grad-blue: linear-gradient(135deg, #74c0fc 0%, #1c7ed6 100%);
  --grad-amber: linear-gradient(135deg, #ffd43b 0%, #f59f00 100%);
  --grad-dark: linear-gradient(135deg, #2b1b26 0%, #1a1017 100%);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI",
    system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, monospace;

  --header-h: 68px;
  --maxw: 1200px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #120b10;
  --bg-alt: #1a1017;
  --bg-elev: rgba(43, 27, 38, 0.72);
  --bg-glass: rgba(43, 27, 38, 0.55);
  --border: rgba(255, 159, 178, 0.14);
  --border-strong: rgba(255, 159, 178, 0.3);
  --text: #f7f4f5;
  --text-soft: #d6ccd2;
  --text-mute: #b3a3ad;
  --peach-50: #2b1b26;
  --peach-100: #3d2836;
  --ink-50: #1a1017;
  --ink-100: #2b1b26;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 18px 44px rgba(0, 0, 0, 0.6);
  --grad-brand-soft: linear-gradient(135deg, #2b1b26 0%, #3d2836 55%, #4d0e23 100%);
  --mint-soft: #0b2e26;
  --blue-soft: #0b2033;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
  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, 159, 178, 0.22), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(28, 126, 214, 0.14), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(12, 166, 120, 0.12), transparent 46%);
  background-attachment: fixed;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease-soft), color 0.4s var(--ease-soft);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 107, 129, 0.16), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(28, 126, 214, 0.12), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(12, 166, 120, 0.1), transparent 46%);
}

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

a {
  color: var(--peach-600);
  text-decoration: none;
  transition: color 0.25s var(--ease-soft), opacity 0.25s var(--ease-soft);
}

a:hover {
  color: var(--peach-500);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: none;
  box-shadow: var(--shadow-glow);
  border-radius: var(--radius-xs);
}

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--text);
}

h1 {
  font-size: clamp(1.6rem, 1.1rem + 2.4vw, 2.6rem);
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.35rem, 1rem + 1.6vw, 1.9rem);
  position: relative;
  padding-left: 18px;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 6px;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  box-shadow: 0 0 12px rgba(255, 107, 129, 0.5);
}

h3 {
  font-size: clamp(1.1rem, 0.95rem + 0.7vw, 1.35rem);
  color: var(--text);
}

p {
  margin: 0 0 1em;
  color: var(--text-soft);
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.35em;
  color: var(--text-soft);
}

li {
  margin-bottom: 0.4em;
}

strong {
  color: var(--text);
  font-weight: 700;
}

::selection {
  background: var(--peach-300);
  color: var(--ink-900);
}

/* ---------- Header ---------- */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background 0.35s var(--ease-soft), box-shadow 0.35s var(--ease-soft),
    border-color 0.35s var(--ease-soft);
}

#site-header.is-scrolled {
  box-shadow: var(--shadow-md);
  background: var(--bg-elev);
}

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--header-h);
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: 0.02em;
  flex-shrink: 0;
  transition: transform 0.3s var(--ease);
}

.brand:hover {
  transform: translateY(-2px);
  color: var(--text);
}

.brand svg {
  width: 38px;
  height: 38px;
  filter: drop-shadow(0 4px 10px rgba(255, 107, 129, 0.4));
  transition: transform 0.5s var(--ease);
}

.brand:hover svg {
  transform: rotate(-8deg) scale(1.06);
}

#site-header nav {
  flex: 1 1 auto;
  min-width: 0;
}

#site-header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
}

#site-header nav a {
  display: inline-block;
  padding: 7px 11px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-soft);
  white-space: nowrap;
  transition: color 0.25s var(--ease-soft), background 0.25s var(--ease-soft),
    transform 0.25s var(--ease);
}

#site-header nav a:hover {
  color: var(--peach-600);
  background: var(--peach-50);
  transform: translateY(-2px);
}

#site-header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

#site-header form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

#site-header input[type="search"] {
  width: 180px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font-size: 0.88rem;
  font-family: inherit;
  transition: width 0.35s var(--ease), border-color 0.25s var(--ease-soft),
    box-shadow 0.25s var(--ease-soft);
}

#site-header input[type="search"]::placeholder {
  color: var(--text-mute);
}

#site-header input[type="search"]:focus {
  width: 230px;
  border-color: var(--peach-400);
  box-shadow: var(--shadow-glow);
  outline: none;
}

#site-header form[role="search"] button {
  padding: 9px 16px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(214, 51, 108, 0.28);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease-soft),
    filter 0.25s var(--ease-soft);
}

#site-header form[role="search"] button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(214, 51, 108, 0.38);
  filter: brightness(1.05);
}

#site-header form[role="search"] button:active {
  transform: translateY(0) scale(0.97);
}

#theme-toggle,
#menu-toggle {
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev);
  color: var(--text-soft);
  font-size: 0.84rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: color 0.25s var(--ease-soft), background 0.25s var(--ease-soft),
    border-color 0.25s var(--ease-soft), transform 0.25s var(--ease);
}

#theme-toggle:hover,
#menu-toggle:hover {
  color: var(--peach-600);
  border-color: var(--peach-400);
  background: var(--peach-50);
  transform: translateY(-2px);
}

#menu-toggle {
  display: none;
}

/* ---------- Breadcrumb ---------- */
body > nav[aria-label="面包屑导航"] {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 20px 0;
}

body > nav[aria-label="面包屑导航"] ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-mute);
}

body > nav[aria-label="面包屑导航"] li {
  margin: 0;
  display: inline-flex;
  align-items: center;
}

body > nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 6px;
  color: var(--peach-300);
  font-weight: 700;
}

body > nav[aria-label="面包屑导航"] a {
  color: var(--text-mute);
  font-weight: 600;
}

body > nav[aria-label="面包屑导航"] a:hover {
  color: var(--peach-600);
}

body > nav[aria-label="面包屑导航"] [aria-current="page"] {
  color: var(--peach-600);
  font-weight: 700;
}

/* ---------- Main layout ---------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 80px;
}

main > section {
  margin: 34px 0;
  padding: 34px clamp(18px, 4vw, 40px);
  border-radius: var(--radius-lg);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  transition: box-shadow 0.4s var(--ease-soft), transform 0.4s var(--ease),
    border-color 0.4s var(--ease-soft);
  opacity: 0;
  transform: translateY(26px);
  will-change: opacity, transform;
}

main > section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  main > section {
    opacity: 1;
    transform: none;
    transition: none;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- Banner ---------- */
#banner {
  position: relative;
  overflow: hidden;
  border: none;
  border-radius: var(--radius-xl);
  background: var(--grad-brand-soft);
  box-shadow: var(--shadow-md);
  padding: clamp(26px, 5vw, 54px);
}

#banner::before {
  content: "";
  position: absolute;
  inset: -40% -20% auto auto;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 129, 0.35), transparent 68%);
  filter: blur(10px);
  pointer-events: none;
  animation: floatBlob 12s var(--ease-soft) infinite alternate;
}

#banner::after {
  content: "";
  position: absolute;
  inset: auto auto -30% -10%;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(28, 126, 214, 0.24), transparent 68%);
  filter: blur(12px);
  pointer-events: none;
  animation: floatBlob 15s var(--ease-soft) infinite alternate-reverse;
}

@keyframes floatBlob {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-30px, 26px, 0) scale(1.12);
  }
}

#banner > h1,
#banner > p,
#banner .carousel {
  position: relative;
  z-index: 1;
}

#banner > h1 {
  margin-bottom: 0.5em;
  max-width: 22ch;
}

#banner > p {
  max-width: 74ch;
  font-size: 1.02rem;
  color: var(--text-soft);
}

.carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.carousel article {
  position: relative;
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow: hidden;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease-soft),
    border-color 0.45s var(--ease-soft);
}

.carousel article::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.45) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.75s var(--ease);
  pointer-events: none;
}

.carousel article:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}

.carousel article:hover::after {
  transform: translateX(120%);
}

.carousel article svg {
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  transition: transform 0.5s var(--ease);
}

.carousel article:hover svg {
  transform: scale(1.03);
}

.carousel article h3 {
  margin-bottom: 0.35em;
  font-size: 1.08rem;
}

.carousel article p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-soft);
}

/* ---------- Stats ---------- */
#stats {
  background: var(--grad-brand);
  border: none;
  color: #fff;
  box-shadow: var(--shadow-lg);
}

#stats h2 {
  color: #fff;
}

#stats h2::before {
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0 14px rgba(255, 255, 255, 0.7);
}

#stats ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
}

#stats li {
  margin: 0;
  padding: 18px 14px;
  text-align: center;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.28);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  font-size: 0.88rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  transition: transform 0.35s var(--ease), background 0.35s var(--ease-soft);
}

#stats li:hover {
  transform: translateY(-6px) scale(1.02);
  background: rgba(255, 255, 255, 0.26);
}

#stats strong {
  display: block;
  font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem);
  font-weight: 900;
  line-height: 1.15;
  color: #fff;
  text-shadow: 0 4px 14px rgba(122, 21, 56, 0.35);
  font-variant-numeric: tabular-nums;
}

/* ---------- Articles ---------- */
#articles article {
  position: relative;
  padding: 20px 22px;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease-soft),
    border-color 0.4s var(--ease-soft);
}

#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity 0.35s var(--ease-soft);
}

#articles article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

#articles article:hover::before {
  opacity: 1;
}

#articles article h3 {
  margin-bottom: 0.3em;
  font-size: 1.12rem;
}

#articles article h3 + p {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--peach-500);
  margin-bottom: 0.6em;
}

#articles article p {
  font-size: 0.94rem;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--peach-600);
}

#articles article a::after {
  content: "→";
  transition: transform 0.3s var(--ease);
}

#articles article a:hover::after {
  transform: translateX(5px);
}

/* ---------- FAQ ---------- */
#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.35s var(--ease-soft), border-color 0.35s var(--ease-soft),
    background 0.35s var(--ease-soft);
}

#faq details:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

#faq details[open] {
  background: var(--peach-50);
  border-color: var(--border-strong);
}

#faq summary {
  position: relative;
  padding: 16px 52px 16px 20px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text);
  list-style: none;
  transition: color 0.25s var(--ease-soft);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1;
  transition: transform 0.35s var(--ease), filter 0.3s var(--ease-soft);
}

#faq details[open] summary::after {
  transform: translateY(-50%) rotate(135deg);
  filter: brightness(0.95);
}

#faq summary:hover {
  color: var(--peach-600);
}

#faq details p {
  margin: 0;
  padding: 0 20px 18px;
  font-size: 0.94rem;
  color: var(--text-soft);
  animation: fadeSlide 0.4s var(--ease) both;
}

@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- HowTo ---------- */
#howto ol {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

#howto ol li {
  position: relative;
  counter-increment: step;
  padding: 12px 16px 12px 58px;
  margin-bottom: 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 0.94rem;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease-soft),
    border-color 0.35s var(--ease-soft);
}

#howto ol li::before {
  content: counter(step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad-brand);
  color: #fff;
  font-weight: 800;
  font-size: 0.86rem;
  box-shadow: 0 4px 12px rgba(214, 51, 108, 0.3);
}

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

/* ---------- Contact ---------- */
#contact ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
}

#contact ul li {
  margin: 0;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 0.92rem;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease-soft),
    box-shadow 0.35s var(--ease-soft);
}

#contact ul li:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

/* ---------- Cases list / Sitemap / Links ---------- */
#cases ul,
#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

#cases ul li {
  margin: 0;
  padding: 12px 18px;
  border-radius: var(--radius-pill);
  background: var(--peach-50);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-soft);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease-soft),
    border-color 0.3s var(--ease-soft);
}

#cases ul li:hover {
  transform: translateY(-4px) scale(1.02);
  background: var(--peach-100);
  border-color: var(--border-strong);
}

#sitemap ul li,
#links ul li {
  margin: 0;
}

#sitemap ul a,
#links ul a {
  display: inline-block;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-soft);
  transition: transform 0.3s var(--ease), color 0.3s var(--ease-soft),
    background 0.3s var(--ease-soft), border-color 0.3s var(--ease-soft),
    box-shadow 0.3s var(--ease-soft);
}

#sitemap ul a:hover,
#links ul a:hover {
  transform: translateY(-4px);
  color: #fff;
  background: var(--grad-brand);
  border-color: transparent;
  box-shadow: 0 8px 20px rgba(214, 51, 108, 0.3);
}

/* ---------- Meta info ---------- */
#meta-info ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

#meta-info ul li {
  margin: 0;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: var(--bg-alt);
  border: 1px dashed var(--border-strong);
  font-size: 0.88rem;
  color: var(--text-soft);
  font-family: var(--font-mono);
}

/* ---------- Footer ---------- */
footer {
  margin-top: 40px;
  padding: 40px 20px 32px;
  background: var(--grad-dark);
  color: rgba(255, 255, 255, 0.82);
  text-align: center;
  border-top: 4px solid transparent;
  border-image: var(--grad-brand) 1;
}

footer p {
  margin: 0 0 16px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 0.9rem;
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

footer nav a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.86rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.86);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease-soft),
    color 0.3s var(--ease-soft), border-color 0.3s var(--ease-soft);
}

footer nav a:hover {
  transform: translateY(-3px);
  color: #fff;
  background: rgba(255, 107, 129, 0.35);
  border-color: rgba(255, 159, 178, 0.6);
}

/* ---------- Back to top ---------- */
#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 24px;
  z-index: 900;
  padding: 12px 18px;
  border: none;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #fff;
  font-size: 0.84rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(214, 51, 108, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px) scale(0.94);
  transition: opacity 0.35s var(--ease-soft), transform 0.35s var(--ease),
    visibility 0.35s var(--ease-soft), box-shadow 0.35s var(--ease-soft);
}

#back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 16px 34px rgba(214, 51, 108, 0.5);
}

#back-to-top:active {
  transform: translateY(-1px) scale(0.98);
}

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .header-inner {
    gap: 12px;
  }
  #site-header input[type="search"] {
    width: 140px;
  }
  #site-header input[type="search"]:focus {
    width: 180px;
  }
}

@media (max-width: 900px) {
  #site-header nav {
    order: 3;
    flex-basis: 100%;
    display: none;
    padding: 8px 0 12px;
    border-top: 1px solid var(--border);
    margin-top: 6px;
  }
  #site-header nav.is-open {
    display: block;
    animation: fadeSlide 0.35s var(--ease) both;
  }
  #site-header nav ul {
    flex-direction: column;
    gap: 2px;
  }
  #site-header nav a {
    display: block;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
  }
  #menu-toggle {
    display: inline-block;
    margin-left: auto;
  }
  #site-header form[role="search"] {
    order: 2;
    flex: 1 1 100%;
  }
  #site-header input[type="search"],
  #site-header input[type="search"]:focus {
    width: 100%;
  }
  main {
    padding: 0 14px 64px;
  }
  main > section {
    padding: 26px 18px;
    border-radius: var(--radius-md);
    margin: 22px 0;
  }
  #banner {
    border-radius: var(--radius-lg);
  }
  .carousel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
  }
  .header-inner {
    padding: 8px 14px;
    gap: 8px;
  }
  .brand span {
    font-size: 1rem;
  }
  .brand svg {
    width: 32px;
    height: 32px;
  }
  #theme-toggle,
  #menu-toggle {
    padding: 8px 12px;
    font-size: 0.78rem;
  }
  #site-header form[role="search"] button {
    padding: 9px 14px;
  }
  body > nav[aria-label="面包屑导航"] {
    padding: 10px 14px 0;
  }
  #stats ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  #stats li {
    padding: 14px 8px;
  }
  #faq summary {
    padding: 14px 46px 14px 16px;
    font-size: 0.92rem;
  }
  #faq details p {
    padding: 0 16px 16px;
  }
  #howto ol li {
    padding: 12px 14px 12px 50px;
  }
  #back-to-top {
    right: 14px;
    bottom: 16px;
    padding: 10px 15px;
    font-size: 0.78rem;
  }
  footer {
    padding: 30px 14px 24px;
  }
  footer nav a {
    padding: 7px 14px;
    font-size: 0.8rem;
  }
}

@media (hover: none) {
  .carousel article:hover,
  #articles article:hover,
  #howto ol li:hover,
  #contact ul li:hover,
  #cases ul li:hover,
  #sitemap ul a:hover,
  #links ul a:hover,
  #stats li:hover {
    transform: none;
  }
}

@media print {
  #site-header,
  #back-to-top,
  footer nav,
  #banner::before,
  #banner::after {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    opacity: 1;
    transform: none;
  }
}