:root {
  --brand: #ff6b35;
  --brand-2: #ffd166;
  --brand-3: #06d6a0;
  --brand-4: #118ab2;
  --accent: #ef476f;
  --ink: #1f2430;
  --ink-soft: #4a5064;
  --ink-mute: #7b8194;
  --bg: #f6f7fb;
  --bg-soft: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.62);
  --border-glass: rgba(255, 255, 255, 0.75);
  --shadow-sm: 0 4px 14px rgba(31, 36, 48, 0.06);
  --shadow-md: 0 10px 30px rgba(31, 36, 48, 0.10);
  --shadow-lg: 0 18px 50px rgba(31, 36, 48, 0.16);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 26px;
  --radius-pill: 999px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --maxw: 1180px;
  --header-h: 68px;
  --grad-hero: linear-gradient(135deg, #ff6b35 0%, #ff8f5a 35%, #ffd166 100%);
  --grad-brand: linear-gradient(120deg, #ff6b35 0%, #ef476f 100%);
  --grad-cool: linear-gradient(120deg, #06d6a0 0%, #118ab2 100%);
}

html[data-theme="dark"] {
  --ink: #eef1f7;
  --ink-soft: #c3c9d8;
  --ink-mute: #8f96ab;
  --bg: #0e1117;
  --bg-soft: #171b24;
  --bg-glass: rgba(23, 27, 36, 0.62);
  --border-glass: rgba(255, 255, 255, 0.10);
  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 18px 50px rgba(0, 0, 0, 0.6);
  --grad-hero: linear-gradient(135deg, #d94f1e 0%, #b83a5c 45%, #6b4b8f 100%);
}

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

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

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 0% 0%, rgba(255, 107, 53, 0.10), transparent 42%),
    radial-gradient(circle at 100% 8%, rgba(6, 214, 160, 0.10), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(17, 138, 178, 0.08), transparent 45%);
  background-attachment: fixed;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
  overflow-x: hidden;
}

html[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 0% 0%, rgba(255, 107, 53, 0.16), transparent 45%),
    radial-gradient(circle at 100% 8%, rgba(6, 214, 160, 0.12), transparent 42%),
    radial-gradient(circle at 50% 100%, rgba(17, 138, 178, 0.14), transparent 48%);
}

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

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

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(255, 107, 53, 0.55);
  outline-offset: 2px;
  border-radius: 6px;
}

h1,
h2,
h3 {
  line-height: 1.3;
  margin: 0 0 0.6em;
  letter-spacing: 0.2px;
}

h1 {
  font-size: clamp(1.7rem, 4.2vw, 2.7rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  font-weight: 800;
  position: relative;
  padding-left: 18px;
}

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

h3 {
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  font-weight: 700;
  color: var(--ink);
}

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

ul,
ol {
  padding-left: 1.3em;
  color: var(--ink-soft);
}

li {
  margin-bottom: 0.4em;
}

time {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--ink-mute);
  margin-bottom: 0.5em;
}

blockquote {
  margin: 0;
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: var(--bg-glass);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: background 0.4s var(--ease), box-shadow 0.3s var(--ease);
}

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

.header-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: var(--header-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--ink);
  flex-shrink: 0;
}

.logo svg {
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.35);
  transition: transform 0.4s var(--ease);
}

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

.logo span {
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#site-header nav {
  flex: 1;
  overflow: hidden;
}

#site-header nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

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

#site-header nav li {
  margin: 0;
  flex-shrink: 0;
}

#site-header nav a {
  display: inline-block;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
  white-space: nowrap;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

#site-header nav a:hover {
  color: #fff;
  background: var(--grad-brand);
  transform: translateY(-2px);
}

.header-tools {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.header-tools button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--ink);
  font-size: 1.05rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}

.header-tools button:hover {
  transform: translateY(-2px) rotate(8deg);
  box-shadow: var(--shadow-md);
  background: var(--grad-brand);
  color: #fff;
}

#menu-toggle {
  display: none;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px 60px;
}

main > section {
  margin: 46px 0;
  padding: 34px 30px;
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.4s var(--ease), transform 0.4s var(--ease), background 0.4s var(--ease);
}

main > section::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}

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

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

#hero {
  margin-top: 30px;
  padding: 46px 34px;
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(6, 214, 160, 0.10)),
    var(--bg-soft);
  border-radius: var(--radius-lg);
  text-align: center;
}

#hero h1 {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5em;
}

#hero > p {
  max-width: 830px;
  margin: 0 auto 30px;
  font-size: 1.02rem;
}

.banner-carousel {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: #000;
}

.banner-carousel .slide {
  display: none;
  animation: fadeSlide 0.7s var(--ease);
}

.banner-carousel .slide.active {
  display: block;
}

.banner-carousel svg {
  width: 100%;
  height: auto;
  display: block;
}

@keyframes fadeSlide {
  from {
    opacity: 0;
    transform: scale(1.03);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.hero-stats > div {
  padding: 20px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.hero-stats > div:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.hero-stats strong {
  display: block;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
}

.hero-stats span {
  font-size: 0.85rem;
  color: var(--ink-mute);
}

nav[aria-label="面包屑导航"],
nav[aria-label="站内锚点导航"] {
  max-width: var(--maxw);
  margin: 26px auto 0;
  padding: 0 20px;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-mute);
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-mute);
}

nav[aria-label="站内锚点导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 14px 16px;
  margin: 14px 0 0;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
}

nav[aria-label="站内锚点导航"] li {
  margin: 0;
}

nav[aria-label="站内锚点导航"] a {
  display: inline-block;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 53, 0.10);
  color: var(--ink-soft);
  transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.25s var(--ease);
}

nav[aria-label="站内锚点导航"] a:hover {
  background: var(--grad-brand);
  color: #fff;
  transform: translateY(-2px);
}

#products h3,
#advantages h3,
#solutions h3,
#cases h3,
#knowledge h3,
#culture h3,
#contact h3 {
  margin-top: 1.4em;
  padding-left: 14px;
  position: relative;
}

#products h3::before,
#advantages h3::before,
#solutions h3::before,
#cases h3::before,
#knowledge h3::before,
#culture h3::before,
#contact h3::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35em;
  bottom: 0.35em;
  width: 4px;
  border-radius: 4px;
  background: var(--grad-cool);
}

#products {
  display: block;
}

#reviews blockquote {
  padding: 18px 22px;
  margin-bottom: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  border-left: 5px solid var(--brand);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

#reviews blockquote:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
}

#reviews blockquote p {
  margin: 0;
  color: var(--ink-soft);
  font-style: italic;
}

#news article,
#articles article {
  padding: 22px 24px;
  margin-bottom: 18px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

#news article:hover,
#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.45);
}

#news article h3,
#articles article h3 {
  margin-top: 0;
}

#articles article a {
  display: inline-block;
  margin-top: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.32);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#articles article a:hover {
  color: #fff;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 10px 24px rgba(255, 107, 53, 0.45);
}

#faq details {
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.35s var(--ease), border-color 0.35s var(--ease);
}

#faq details[open] {
  border-color: rgba(255, 107, 53, 0.45);
  box-shadow: var(--shadow-md);
}

#faq summary {
  cursor: pointer;
  padding: 16px 20px;
  font-weight: 700;
  color: var(--ink);
  list-style: none;
  position: relative;
  padding-right: 48px;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

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

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--brand);
  transition: transform 0.35s var(--ease);
}

#faq details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

#faq summary:hover {
  background: rgba(255, 107, 53, 0.08);
}

#faq details p {
  padding: 0 20px 18px;
  margin: 0;
  animation: fadeIn 0.4s var(--ease);
}

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

#howto ol,
#howto ul {
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 18px 18px 18px 40px;
}

#contact p {
  margin-bottom: 0.5em;
}

#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  padding: 0;
  margin: 0;
}

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

#sitemap a,
#links a {
  display: inline-block;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-glass);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-soft);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

#sitemap a:hover,
#links a:hover {
  background: var(--grad-brand);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

footer {
  margin-top: 30px;
  padding: 50px 20px 30px;
  background:
    linear-gradient(160deg, rgba(255, 107, 53, 0.10), rgba(17, 138, 178, 0.10)),
    var(--bg-soft);
  border-top: 1px solid var(--border-glass);
}

footer > section {
  max-width: var(--maxw);
  margin: 0 auto 26px;
  padding: 24px 26px;
  border-radius: var(--radius-md);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-sm);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

footer > section:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

footer > section h2 {
  font-size: 1.1rem;
  margin-bottom: 0.5em;
}

footer > section h2::before {
  background: var(--grad-cool);
}

footer > p {
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
  font-size: 0.85rem;
  color: var(--ink-mute);
  padding-top: 10px;
  border-top: 1px dashed var(--border-glass);
}

#back-to-top {
  position: fixed;
  right: 22px;
  bottom: 26px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--grad-brand);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(255, 107, 53, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s var(--ease), box-shadow 0.35s var(--ease);
  z-index: 998;
}

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

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: 0 16px 34px rgba(255, 107, 53, 0.55);
}

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  will-change: opacity, transform;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 1024px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  #menu-toggle {
    display: inline-flex;
  }

  #site-header nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 16px;
    right: 16px;
    padding: 14px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.45s var(--ease), opacity 0.35s var(--ease), visibility 0.35s var(--ease), padding 0.35s var(--ease);
  }

  #site-header nav.open {
    max-height: 420px;
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
  }

  #site-header nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    overflow: visible;
  }

  #site-header nav a {
    display: block;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
  }

  main > section {
    padding: 26px 20px;
    margin: 30px 0;
    border-radius: var(--radius-md);
  }

  #hero {
    padding: 32px 20px;
  }

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

  nav[aria-label="站内锚点导航"] ul {
    padding: 12px;
  }
}

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

  .header-inner {
    padding: 8px 14px;
    gap: 10px;
  }

  .logo span {
    display: none;
  }

  .logo svg {
    width: 36px;
    height: 36px;
  }

  main {
    padding: 0 14px 46px;
  }

  nav[aria-label="面包屑导航"],
  nav[aria-label="站内锚点导航"] {
    padding: 0 14px;
  }

  main > section {
    padding: 22px 16px;
    border-radius: var(--radius-md);
  }

  #hero {
    padding: 26px 16px;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .hero-stats > div {
    padding: 14px 8px;
  }

  .hero-stats strong {
    font-size: 1.3rem;
  }

  .hero-stats span {
    font-size: 0.76rem;
  }

  h2 {
    padding-left: 14px;
    font-size: 1.25rem;
  }

  h2::before {
    width: 5px;
  }

  #news article,
  #articles article {
    padding: 18px 16px;
  }

  #faq summary {
    padding: 14px 16px;
    padding-right: 44px;
    font-size: 0.95rem;
  }

  #faq summary::after {
    right: 16px;
  }

  #faq details p {
    padding: 0 16px 16px;
  }

  footer {
    padding: 34px 14px 24px;
  }

  footer > section {
    padding: 18px 16px;
  }

  #back-to-top {
    right: 14px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}