:root {
  --color-bg: #f5f7fb;
  --color-bg-alt: #eef2f9;
  --color-surface: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.72);
  --color-border: rgba(26, 43, 74, 0.12);
  --color-text: #1a2b4a;
  --color-text-soft: #4a5a75;
  --color-text-muted: #6b7a94;
  --color-primary: #1a2b4a;
  --color-primary-soft: #2f5d9e;
  --color-accent: #f2a541;
  --color-accent-soft: #ffcf7a;
  --color-danger: #d9534f;
  --color-link: #2f5d9e;
  --gradient-hero: linear-gradient(135deg, #1a2b4a 0%, #2f5d9e 55%, #4a86c8 100%);
  --gradient-accent: linear-gradient(135deg, #f2a541 0%, #ffcf7a 100%);
  --gradient-soft: linear-gradient(180deg, rgba(47, 93, 158, 0.08), rgba(242, 165, 65, 0.06));
  --shadow-sm: 0 2px 8px rgba(26, 43, 74, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 43, 74, 0.1);
  --shadow-lg: 0 18px 48px rgba(26, 43, 74, 0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --content-max: 1180px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0d1524;
    --color-bg-alt: #111c30;
    --color-surface: #16233a;
    --color-surface-glass: rgba(22, 35, 58, 0.72);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-text: #eaf0fa;
    --color-text-soft: #b9c6db;
    --color-text-muted: #8b9ab3;
    --color-primary: #4a86c8;
    --color-primary-soft: #6ba3e0;
    --color-accent: #f2a541;
    --color-accent-soft: #ffcf7a;
    --color-link: #8ec0f5;
    --gradient-hero: linear-gradient(135deg, #0b1322 0%, #1a2b4a 55%, #2f5d9e 100%);
    --gradient-soft: linear-gradient(180deg, rgba(74, 134, 200, 0.12), rgba(242, 165, 65, 0.08));
    --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 48px rgba(0, 0, 0, 0.6);
  }
}

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(74, 134, 200, 0.1), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(242, 165, 65, 0.1), transparent 38%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-4);
  line-height: 1.35;
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  position: relative;
  padding-bottom: var(--space-3);
}

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

h3 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  color: var(--color-primary);
}

@media (prefers-color-scheme: dark) {
  h3 {
    color: var(--color-primary-soft);
  }
}

h4 {
  font-size: 1.05rem;
  color: var(--color-text);
}

p {
  margin: 0 0 var(--space-4);
  color: var(--color-text-soft);
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
  color: var(--color-text-soft);
}

li {
  margin-bottom: var(--space-2);
}

blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-4) var(--space-5);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--gradient-soft);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--color-text-soft);
  font-style: normal;
}

blockquote p {
  margin: 0;
}

time {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-glass);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

header > div {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

header a[aria-label] {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: transform var(--transition-base);
}

header a[aria-label]:hover {
  transform: translateY(-2px);
  color: var(--color-text);
}

header a[aria-label] svg {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

header a[aria-label]:hover svg {
  transform: rotate(-6deg) scale(1.05);
  box-shadow: var(--shadow-md);
}

header nav {
  flex: 1 1 auto;
}

header nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-4);
  margin: 0;
  padding: 0;
  list-style: none;
}

header nav li {
  margin: 0;
}

header nav a {
  position: relative;
  display: inline-block;
  padding: var(--space-2) var(--space-1);
  font-size: 0.92rem;
  color: var(--color-text-soft);
  font-weight: 500;
}

header nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

header nav a:hover,
header nav a:focus-visible {
  color: var(--color-primary);
}

header nav a:hover::after,
header nav a:focus-visible::after {
  transform: scaleX(1);
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 1 280px;
}

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

header form[role="search"] input {
  flex: 1 1 auto;
  min-width: 0;
  padding: var(--space-2) var(--space-4);
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}

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

header form[role="search"] input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
  box-shadow: 0 0 0 4px rgba(242, 165, 65, 0.18);
}

header form[role="search"] button {
  flex: 0 0 auto;
  padding: var(--space-2) var(--space-4);
  font-size: 0.9rem;
  font-family: inherit;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-hero);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

header form[role="search"] button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.08);
}

header form[role="search"] button:active {
  transform: translateY(0);
}

nav[aria-label="面包屑导航"] {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5) 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

nav[aria-label="面包屑导航"] li {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

nav[aria-label="面包屑导航"] li + li::before {
  content: "/";
  color: var(--color-text-muted);
  opacity: 0.6;
}

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

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

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

main {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-4) var(--space-5) var(--space-9);
}

section {
  margin: var(--space-8) 0;
  padding: var(--space-6);
  background: var(--color-surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  animation: fadeUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
  animation-timeline: view();
  animation-range: entry 0% entry 28%;
}

@supports not (animation-timeline: view()) {
  section {
    animation: none;
  }
}

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

section#hero {
  position: relative;
  margin-top: var(--space-6);
  padding: var(--space-8) var(--space-6);
  background: var(--gradient-hero);
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  isolation: isolate;
}

section#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 82% 18%, rgba(242, 165, 65, 0.32), transparent 46%),
    radial-gradient(circle at 12% 88%, rgba(255, 255, 255, 0.14), transparent 42%);
  z-index: -1;
}

section#hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -12%;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.16), transparent 68%);
  filter: blur(6px);
  animation: floatOrb 12s ease-in-out infinite alternate;
  z-index: -1;
}

@keyframes floatOrb {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(-40px, 40px, 0) scale(1.12);
  }
}

section#hero h1 {
  color: #ffffff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.28);
}

section#hero h1::after {
  display: none;
}

section#hero p {
  max-width: 72ch;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.02rem;
}

section#hero > div {
  margin-top: var(--space-6);
  display: flex;
  justify-content: center;
}

section#hero svg {
  width: 100%;
  max-width: 640px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: #eef3fb;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

section#hero svg:hover {
  transform: translateY(-6px) scale(1.012);
  box-shadow: 0 28px 64px rgba(0, 0, 0, 0.32);
}

section > h2:first-child {
  margin-top: 0;
}

section#about,
section#product,
section#solution,
section#cases,
section#news,
section#articles,
section#howto,
section#faq,
section#contact,
section#author-info {
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
}

section#about:hover,
section#product:hover,
section#solution:hover,
section#cases:hover,
section#news:hover,
section#articles:hover,
section#howto:hover,
section#faq:hover,
section#contact:hover,
section#author-info:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(242, 165, 65, 0.4);
}

section#product h3,
section#solution h3,
section#cases h3,
section#news h3,
section#articles h3,
section#howto h3,
section#contact h3 {
  margin-top: var(--space-5);
  padding-left: var(--space-4);
  border-left: 4px solid var(--color-accent);
  border-radius: 2px;
}

section#product h4,
section#solution h4,
section#howto h4 {
  margin-top: var(--space-5);
  color: var(--color-primary);
}

@media (prefers-color-scheme: dark) {
  section#product h4,
  section#solution h4,
  section#howto h4 {
    color: var(--color-accent-soft);
  }
}

section#product h4::before,
section#solution h4::before,
section#howto h4::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: var(--space-3);
  border-radius: 50%;
  background: var(--gradient-accent);
  vertical-align: middle;
}

section#news article,
section#articles article {
  position: relative;
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

section#news article::before,
section#articles article::before {
  content: "";
  position: absolute;
  left: 0;
  top: var(--space-5);
  bottom: var(--space-5);
  width: 3px;
  border-radius: 3px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

section#news article:hover,
section#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(242, 165, 65, 0.45);
}

section#news article:hover::before,
section#articles article:hover::before {
  opacity: 1;
}

section#news article h3,
section#articles article h3 {
  margin: 0 0 var(--space-2);
  padding-left: 0;
  border-left: none;
  font-size: 1.12rem;
}

section#news article p,
section#articles article p {
  margin-bottom: var(--space-3);
}

section#articles article a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--color-primary);
  padding: var(--space-2) var(--space-4);
  border-radius: 999px;
  background: var(--gradient-soft);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast), background var(--transition-fast);
}

section#articles article a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

section#articles article a:hover {
  color: #fff;
  background: var(--gradient-hero);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

section#faq details {
  margin-bottom: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

section#faq details:hover {
  border-color: rgba(242, 165, 65, 0.45);
  box-shadow: var(--shadow-md);
}

section#faq details[open] {
  border-color: rgba(242, 165, 65, 0.6);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

section#faq summary {
  position: relative;
  padding-right: var(--space-7);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast);
}

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

section#faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  line-height: 1;
  color: var(--color-primary);
  background: var(--gradient-soft);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base);
}

section#faq details[open] summary {
  color: var(--color-primary);
}

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

section#faq details p {
  margin: var(--space-4) 0 0;
  animation: fadeUp 0.4s ease both;
}

section#cases blockquote {
  font-size: 0.98rem;
}

section#contact a[href^="tel"],
section#contact a[href^="mailto"] {
  font-weight: 600;
  border-bottom: 2px dashed rgba(242, 165, 65, 0.5);
  padding-bottom: 1px;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

section#contact a[href^="tel"]:hover,
section#contact a[href^="mailto"]:hover {
  border-color: var(--color-accent);
}

section#author-info {
  background: var(--gradient-soft);
}

footer {
  position: relative;
  margin-top: var(--space-8);
  padding: var(--space-8) var(--space-5) var(--space-6);
  background: var(--gradient-hero);
  color: rgba(255, 255, 255, 0.84);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 78% 12%, rgba(242, 165, 65, 0.22), transparent 46%);
  pointer-events: none;
}

footer > section {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto var(--space-6);
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  animation: none;
}

footer > section:hover {
  transform: none;
  box-shadow: none;
  border-color: transparent;
}

footer h2 {
  font-size: 1.05rem;
  color: #ffffff;
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-4);
}

footer h2::after {
  width: 40px;
  height: 3px;
}

footer h3 {
  font-size: 0.95rem;
  color: var(--color-accent-soft);
  margin: var(--space-4) 0 var(--space-2);
}

footer p,
footer li {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.9rem;
}

footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  padding: 0;
  list-style: none;
}

footer li {
  margin: 0;
}

footer a {
  color: rgba(255, 255, 255, 0.86);
  position: relative;
}

footer a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

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

footer a:hover::after {
  transform: scaleX(1);
}

footer > p {
  position: relative;
  max-width: var(--content-max);
  margin: var(--space-6) auto 0;
  padding-top: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  text-align: center;
  font-size: 0.84rem;
  color: rgba(255, 255, 255, 0.62);
}

@media (max-width: 960px) {
  header > div {
    gap: var(--space-3);
  }

  header form[role="search"] {
    flex: 1 1 100%;
    order: 3;
  }

  header nav {
    flex: 1 1 100%;
    order: 2;
  }

  header nav ul {
    gap: var(--space-1) var(--space-3);
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-1);
    scrollbar-width: thin;
  }

  header nav a {
    white-space: nowrap;
  }

  section {
    padding: var(--space-5);
    border-radius: var(--radius-md);
  }

  section#hero {
    padding: var(--space-6) var(--space-5);
    border-radius: var(--radius-lg);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  header > div {
    padding: var(--space-3) var(--space-4);
  }

  header a[aria-label] span {
    font-size: 0.98rem;
  }

  nav[aria-label="面包屑导航"] {
    padding: var(--space-3) var(--space-4) 0;
  }

  main {
    padding: var(--space-2) var(--space-4) var(--space-7);
  }

  section {
    margin: var(--space-6) 0;
    padding: var(--space-4);
  }

  section#hero {
    margin-top: var(--space-4);
    padding: var(--space-5) var(--space-4);
  }

  section#hero p {
    font-size: 0.95rem;
  }

  section#product h3,
  section#solution h3,
  section#cases h3,
  section#news h3,
  section#articles h3,
  section#howto h3,
  section#contact h3 {
    padding-left: var(--space-3);
  }

  section#news article,
  section#articles article {
    padding: var(--space-4);
  }

  section#faq details {
    padding: var(--space-3) var(--space-4);
  }

  blockquote {
    padding: var(--space-3) var(--space-4);
  }

  footer {
    padding: var(--space-6) var(--space-4) var(--space-5);
  }

  footer ul {
    gap: var(--space-2) var(--space-4);
  }
}

@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,
  footer,
  nav[aria-label="面包屑导航"],
  section#hero svg {
    display: none;
  }

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

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