:root {
  --bg: #0f1020;
  --bg-alt: #16182e;
  --surface: rgba(255, 255, 255, 0.06);
  --surface-solid: #1b1d36;
  --border: rgba(255, 255, 255, 0.12);
  --text: #eef0ff;
  --text-muted: #a3a8c9;
  --primary: #7c5cff;
  --primary-2: #ff5c9d;
  --accent: #35d0ba;
  --gradient: linear-gradient(135deg, #7c5cff 0%, #ff5c9d 55%, #ffb35c 100%);
  --gradient-soft: linear-gradient(135deg, rgba(124, 92, 255, 0.18), rgba(255, 92, 157, 0.14));
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 8px 22px rgba(0, 0, 0, 0.3);
  --radius: 18px;
  --radius-sm: 12px;
  --blur: saturate(160%) blur(16px);
  --maxw: 1180px;
  --transition: 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f5fb;
    --bg-alt: #ffffff;
    --surface: rgba(255, 255, 255, 0.72);
    --surface-solid: #ffffff;
    --border: rgba(20, 22, 50, 0.1);
    --text: #181a33;
    --text-muted: #5a5f7d;
    --shadow: 0 18px 45px rgba(60, 70, 120, 0.16);
    --shadow-sm: 0 8px 22px rgba(60, 70, 120, 0.12);
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(124, 92, 255, 0.22), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(255, 92, 157, 0.18), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(53, 208, 186, 0.12), transparent 45%);
  background-attachment: fixed;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

a:hover {
  color: var(--primary-2);
}

ul,
ol {
  padding-left: 1.4em;
  margin: 0 0 1em;
}

li {
  margin: 0.35em 0;
}

p {
  margin: 0 0 1em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.35;
  margin: 0 0 0.6em;
  font-weight: 700;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.7rem, 4.2vw, 2.9rem);
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  position: relative;
  padding-left: 0.7em;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 5px;
  border-radius: 4px;
  background: var(--gradient);
}

h3 {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  color: var(--text);
}

h4 {
  font-size: 1.02rem;
  color: var(--primary);
}

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

::selection {
  background: rgba(124, 92, 255, 0.4);
  color: #fff;
}

/* ---------- Header / Navigation ---------- */

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 16, 32, 0.62);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
}

@media (prefers-color-scheme: light) {
  header {
    background: rgba(255, 255, 255, 0.7);
  }
}

header nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header nav > a {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
  transition: transform var(--transition), filter var(--transition);
}

header nav > a:hover {
  transform: translateY(-1px);
  filter: brightness(1.15);
}

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

header nav ul li {
  margin: 0;
}

header nav ul li a {
  display: inline-block;
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-radius: 999px;
  transition: color var(--transition), background var(--transition), transform var(--transition);
}

header nav ul li a:hover {
  color: var(--text);
  background: var(--surface);
  transform: translateY(-2px);
}

/* ---------- Breadcrumb ---------- */

body > nav[aria-label="面包屑导航"] {
  max-width: var(--maxw);
  margin: 1rem auto 0;
  padding: 0 1.25rem;
}

body > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: fit-content;
}

body > nav[aria-label="面包屑导航"] ol li {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

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

/* ---------- Main layout ---------- */

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

section {
  position: relative;
  padding: 1.75rem 1.5rem;
  background: var(--surface);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  animation: fadeUp 0.7s ease both;
  overflow: hidden;
}

section::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-soft);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}

section:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: rgba(124, 92, 255, 0.35);
}

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

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

/* ---------- Hero ---------- */

#home {
  padding: 3rem 2rem;
  background: var(--gradient);
  background-size: 200% 200%;
  animation: gradientShift 14s ease infinite, fadeUp 0.7s ease both;
  border: none;
  box-shadow: 0 24px 60px rgba(124, 92, 255, 0.35);
  text-align: center;
}

#home::after {
  display: none;
}

#home:hover {
  transform: translateY(-2px);
}

#home h1 {
  background: none;
  -webkit-text-fill-color: #fff;
  color: #fff;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.25);
  margin-bottom: 1rem;
}

#home p {
  max-width: 860px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1.02rem;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.18);
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ---------- Articles / cards ---------- */

article {
  padding: 1.25rem 1.35rem;
  margin: 0 0 1rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

article:last-child {
  margin-bottom: 0;
}

article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(255, 92, 157, 0.4);
}

article h3 {
  margin-bottom: 0.5rem;
}

article h4 {
  margin-top: 1rem;
}

article h4:first-of-type {
  margin-top: 0;
}

article p:last-child {
  margin-bottom: 0;
}

article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.1rem 0.65rem;
  margin-bottom: 0.6rem;
}

/* ---------- Blockquote / testimonials ---------- */

blockquote {
  margin: 0 0 1rem;
  padding: 1rem 1.25rem 1rem 1.4rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-left: 4px solid transparent;
  border-image: var(--gradient) 1;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}

blockquote:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

blockquote p {
  margin: 0;
  color: var(--text-muted);
  font-style: italic;
}

blockquote p::before {
  content: "\201C";
  font-size: 1.6rem;
  color: var(--primary-2);
  margin-right: 0.15rem;
  vertical-align: -0.2em;
}

/* ---------- Lists inside sections ---------- */

section > ul,
article > ul {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

section > ul li,
article > ul li {
  padding-left: 0.2rem;
}

section > ul li::marker,
article > ul li::marker {
  color: var(--primary-2);
}

ol li::marker {
  color: var(--primary);
  font-weight: 700;
}

/* ---------- Sitemap & links grid ---------- */

#sitemap ul,
#links ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
}

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

#sitemap ul li a,
#links ul li a {
  display: block;
  padding: 0.55rem 0.9rem;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: transform var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
}

#sitemap ul li a:hover,
#links ul li a:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  background: var(--gradient-soft);
  color: var(--primary-2);
}

/* ---------- Contact / address ---------- */

address {
  font-style: normal;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
}

address p {
  margin: 0;
  padding: 0.75rem 1rem;
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  transition: transform var(--transition), border-color var(--transition);
}

address p:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

/* ---------- Footer ---------- */

footer {
  margin-top: 1rem;
  padding: 2rem 1.25rem 2.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
  border-top: 1px solid var(--border);
  background: rgba(15, 16, 32, 0.45);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}

@media (prefers-color-scheme: light) {
  footer {
    background: rgba(255, 255, 255, 0.6);
  }
}

footer p {
  margin: 0.3rem 0;
}

footer nav ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.25rem;
}

footer nav ul li {
  margin: 0;
}

footer nav ul li a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}

footer nav ul li a:hover {
  color: var(--primary-2);
}

/* ---------- Animations ---------- */

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

section:nth-of-type(2) { animation-delay: 0.05s; }
section:nth-of-type(3) { animation-delay: 0.1s; }
section:nth-of-type(4) { animation-delay: 0.15s; }
section:nth-of-type(5) { animation-delay: 0.2s; }
section:nth-of-type(6) { animation-delay: 0.25s; }
section:nth-of-type(7) { animation-delay: 0.3s; }
section:nth-of-type(8) { animation-delay: 0.35s; }
section:nth-of-type(9) { animation-delay: 0.4s; }
section:nth-of-type(10) { animation-delay: 0.45s; }

@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;
  }
}

/* ---------- Scrollbar ---------- */

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

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

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary), var(--primary-2));
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
  filter: brightness(1.15);
}

/* ---------- Focus visibility ---------- */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary-2);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  header nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  header nav ul {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.25rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

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

  header nav ul li a {
    white-space: nowrap;
  }

  main {
    padding: 1rem 1rem 2.5rem;
    gap: 1.1rem;
  }

  section {
    padding: 1.35rem 1.15rem;
    border-radius: var(--radius-sm);
  }

  #home {
    padding: 2.2rem 1.25rem;
  }

  article {
    padding: 1.05rem 1.1rem;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 15px;
    line-height: 1.7;
  }

  header nav {
    padding: 0.6rem 0.9rem;
  }

  body > nav[aria-label="面包屑导航"] {
    padding: 0 0.9rem;
    margin-top: 0.75rem;
  }

  body > nav[aria-label="面包屑导航"] ol {
    font-size: 0.78rem;
    padding: 0.45rem 0.8rem;
  }

  main {
    padding: 0.9rem 0.9rem 2rem;
  }

  section {
    padding: 1.15rem 1rem;
  }

  #home {
    padding: 1.8rem 1rem;
  }

  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  #sitemap ul li a,
  #links ul li a {
    padding: 0.45rem 0.6rem;
    font-size: 0.82rem;
    text-align: center;
  }

  address {
    grid-template-columns: 1fr;
  }

  blockquote {
    padding: 0.85rem 1rem;
  }
}

@media (max-width: 380px) {
  #sitemap ul,
  #links ul {
    grid-template-columns: 1fr;
  }
}

/* ---------- Print ---------- */

@media print {
  body {
    background: #fff;
    color: #000;
  }

  header,
  footer,
  body > nav[aria-label="面包屑导航"] {
    display: none;
  }

  section {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }

  #home {
    background: #eee;
  }

  #home h1,
  #home p {
    color: #000;
    -webkit-text-fill-color: #000;
    text-shadow: none;
  }
}