:root {
  --paper: #ffffff;
  --surface: #f7f7f8;
  --ink: #15171a;
  --muted: #5e636e;
  --line: #d9dce4;
  --blue: #002fa7;
  --blue-soft: #e9efff;
  --max-width: 1180px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  padding: 10px 14px;
  background: var(--blue);
  color: #ffffff;
  transform: translateY(-120%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.header-inner,
.page-shell,
.site-footer-inner {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

.header-inner {
  min-height: 76px;
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto;
  align-items: center;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  width: fit-content;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--blue);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
}

.site-nav a {
  position: relative;
  padding: 29px 0 26px;
  color: var(--muted);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--blue);
}

.site-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 3px;
  background: var(--blue);
}

.hero {
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  min-height: 610px;
  display: grid;
  grid-template-columns: 78px minmax(0, 1.45fr) minmax(280px, 0.75fr);
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.index-rail {
  border-right: 1px solid var(--line);
  padding: 38px 0;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-align: center;
}

.index-rail span {
  writing-mode: vertical-rl;
}

.hero-copy {
  align-self: end;
  padding: 64px 64px 70px;
}

.eyebrow {
  margin: 0 0 30px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.hero h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(58px, 9vw, 126px);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.07em;
}

.hero h2 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 500;
  line-height: 1.28;
  letter-spacing: -0.03em;
}

.hero-copy p {
  max-width: 660px;
  margin-bottom: 36px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button-link {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--blue);
  background: var(--blue);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
}

.button-link.secondary {
  background: #ffffff;
  color: var(--blue);
}

.button-link:hover {
  background: #ffffff;
  color: var(--blue);
}

.button-link.secondary:hover {
  background: var(--blue-soft);
}

.hero-facts {
  display: grid;
  align-content: end;
  border-left: 1px solid var(--line);
  background: var(--surface);
}

.fact {
  padding: 28px 30px;
  border-top: 1px solid var(--line);
}

.fact:first-child {
  border-top: 0;
}

.fact-number {
  display: block;
  margin-bottom: 28px;
  color: var(--blue);
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.fact strong,
.fact span {
  display: block;
}

.fact strong {
  margin-bottom: 6px;
  font-size: 16px;
}

.fact span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.section {
  border-bottom: 1px solid var(--line);
}

.section-grid {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  border-right: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.section-content {
  min-width: 0;
  padding: 88px 64px;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.65fr) minmax(300px, 1fr);
  gap: 70px;
  margin-bottom: 54px;
}

.section-heading h2,
.page-title h1 {
  margin-bottom: 0;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.05em;
}

.section-heading p,
.lead {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.company-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.company-copy,
.company-meta {
  padding: 34px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.company-copy p {
  margin-bottom: 16px;
  font-size: 16px;
  line-height: 1.9;
}

.company-copy p:last-child {
  margin-bottom: 0;
}

.definition-list {
  margin: 0;
}

.definition-list div {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.definition-list div:first-child {
  padding-top: 0;
}

.definition-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.definition-list dt {
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
}

.definition-list dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
}

.service-grid,
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.service-card,
.advantage-card {
  min-height: 255px;
  padding: 30px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.service-card .number,
.advantage-card .number {
  display: block;
  margin-bottom: 52px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.service-card h3,
.advantage-card h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.service-card p,
.advantage-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.advantage-card {
  min-height: 210px;
  background: var(--surface);
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 25px 54px 25px 0;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 700;
}

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

.faq-list summary::after {
  content: "+";
  position: absolute;
  top: 20px;
  right: 4px;
  color: var(--blue);
  font-size: 28px;
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-answer {
  max-width: 780px;
  padding: 0 54px 26px 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.contact-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.contact-intro,
.contact-details {
  padding: 38px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact-intro {
  background: var(--blue);
  color: #ffffff;
}

.contact-intro h3 {
  margin-bottom: 18px;
  font-size: 32px;
}

.contact-intro p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.8;
}

.contact-details a {
  color: var(--blue);
}

.page-title {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-title-content {
  padding: 86px 64px 68px;
}

.page-title .lead {
  max-width: 760px;
  margin-top: 28px;
}

.content-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 70px;
}

.content-index {
  align-self: start;
  position: sticky;
  top: 110px;
  padding-top: 4px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.content-index strong {
  display: block;
  margin-bottom: 12px;
  color: var(--blue);
}

.prose {
  max-width: 780px;
}

.prose section {
  padding: 0 0 42px;
  margin-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.prose section:last-child {
  margin-bottom: 0;
  border-bottom: 0;
}

.prose h2 {
  margin-bottom: 18px;
  font-size: 25px;
  line-height: 1.35;
}

.prose h3 {
  margin: 26px 0 12px;
  font-size: 18px;
}

.prose p,
.prose li {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.prose ul,
.prose ol {
  padding-left: 22px;
}

.prose a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.notice {
  padding: 24px;
  border-left: 5px solid var(--blue);
  background: var(--blue-soft);
}

.site-footer {
  background: var(--surface);
}

.site-footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  padding: 54px 0 34px;
}

.footer-brand {
  margin-bottom: 24px;
  font-size: 23px;
  font-weight: 700;
}

.footer-company {
  margin-bottom: 10px;
  font-size: 14px;
  font-weight: 700;
}

.footer-address {
  max-width: 590px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 28px;
  align-content: start;
  font-size: 13px;
}

.footer-links a {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--blue);
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.legacy-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
  background: var(--surface);
}

.legacy-card {
  width: min(100%, 620px);
  padding: 48px;
  border: 1px solid var(--line);
  background: var(--paper);
}

@media (max-width: 980px) {
  .header-inner {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 16px;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    gap: 22px;
  }

  .site-nav a {
    flex: 0 0 auto;
    padding: 18px 0 16px;
  }

  .hero-grid {
    grid-template-columns: 58px minmax(0, 1fr);
  }

  .hero-copy {
    padding: 70px 38px 52px;
  }

  .hero-facts {
    grid-column: 1 / -1;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .fact {
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .fact:first-child {
    border-left: 0;
  }

  .section-grid,
  .page-title {
    grid-template-columns: 58px minmax(0, 1fr);
  }

  .section-content,
  .page-title-content {
    padding: 68px 38px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .service-grid,
  .advantage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .company-grid,
  .contact-panel,
  .site-footer-inner {
    grid-template-columns: 1fr;
  }

  .content-layout {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .content-index {
    position: static;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .header-inner,
  .page-shell,
  .site-footer-inner {
    width: min(calc(100% - 24px), var(--max-width));
  }

  .brand {
    font-size: 17px;
  }

  .site-nav {
    font-size: 13px;
  }

  .hero-grid,
  .section-grid,
  .page-title {
    grid-template-columns: 40px minmax(0, 1fr);
  }

  .index-rail {
    padding-top: 24px;
    font-size: 11px;
  }

  .hero-copy,
  .section-content,
  .page-title-content {
    padding: 48px 22px;
  }

  .hero-grid {
    min-height: auto;
  }

  .hero h1 {
    font-size: clamp(48px, 17vw, 76px);
  }

  .hero h2 {
    font-size: 25px;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .fact,
  .fact:first-child {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .service-grid,
  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .service-card,
  .advantage-card {
    min-height: 0;
  }

  .service-card .number,
  .advantage-card .number {
    margin-bottom: 34px;
  }

  .company-copy,
  .company-meta,
  .contact-intro,
  .contact-details {
    padding: 26px;
  }

  .site-footer-inner {
    gap: 36px;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .legacy-card {
    padding: 34px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Aurora technology redesign — official portal only */
:root {
  color-scheme: dark;
  --paper: #080a1c;
  --surface: rgba(15, 20, 52, 0.72);
  --surface-strong: rgba(20, 27, 68, 0.9);
  --ink: #f7f8ff;
  --muted: #aeb7d8;
  --line: rgba(168, 184, 255, 0.16);
  --blue: #6d7dff;
  --blue-soft: rgba(93, 52, 208, 0.2);
  --violet: #7c3aed;
  --magenta: #ec4899;
  --cyan: #22d3ee;
  --max-width: 1240px;
}

body {
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 8%, rgba(93, 52, 208, 0.34), transparent 30%),
    radial-gradient(circle at 88% 18%, rgba(34, 211, 238, 0.2), transparent 26%),
    radial-gradient(circle at 58% 78%, rgba(236, 72, 153, 0.16), transparent 32%),
    linear-gradient(145deg, #060718 0%, #0a0d26 46%, #080a1c 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: Inter, "Inter Variable", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  animation: aurora-drift 18s ease-in-out infinite alternate;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(126, 146, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 146, 255, 0.055) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.42) 58%, transparent 100%);
}

body::after {
  content: "";
  position: fixed;
  width: 42vw;
  height: 42vw;
  right: -16vw;
  bottom: -22vw;
  z-index: -1;
  pointer-events: none;
  border-radius: 50%;
  background: conic-gradient(from 180deg, rgba(34, 211, 238, 0.24), rgba(124, 58, 237, 0.26), rgba(236, 72, 153, 0.2), rgba(34, 211, 238, 0.24));
  filter: blur(90px);
  animation: ambient-spin 22s linear infinite;
}

a:focus-visible,
summary:focus-visible {
  outline-color: var(--cyan);
}

.skip-link {
  border-radius: 0 0 12px 0;
  background: linear-gradient(135deg, var(--violet), var(--cyan));
}

.site-header {
  top: 0;
  padding-top: 14px;
  border-bottom: 0;
  background: linear-gradient(to bottom, rgba(6, 7, 24, 0.94), rgba(6, 7, 24, 0));
}

.header-inner,
.page-shell,
.site-footer-inner {
  width: min(calc(100% - 48px), var(--max-width));
}

.header-inner {
  min-height: 68px;
  padding: 0 20px;
  border: 1px solid rgba(177, 192, 255, 0.18);
  border-radius: 20px;
  background: rgba(11, 15, 39, 0.72);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(24px) saturate(135%);
  -webkit-backdrop-filter: blur(24px) saturate(135%);
}

.brand {
  gap: 12px;
  color: #ffffff;
  font-size: 18px;
  letter-spacing: 0.02em;
}

.brand-mark {
  position: relative;
  width: 38px;
  height: 38px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 12px;
  background: linear-gradient(135deg, var(--violet), #3b82f6 50%, var(--cyan));
  box-shadow: 0 0 28px rgba(90, 107, 255, 0.55);
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: -60% -30%;
  background: linear-gradient(110deg, transparent 38%, rgba(255, 255, 255, 0.52) 50%, transparent 62%);
  transform: translateX(-55%) rotate(14deg);
  animation: brand-sheen 5.4s ease-in-out infinite;
}

.site-nav {
  gap: 10px;
  font-size: 13px;
}

.site-nav a {
  padding: 13px 15px;
  border-radius: 11px;
  color: #aeb7d8;
  transition: color 220ms ease, background-color 220ms ease, transform 220ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: #ffffff;
  background: rgba(109, 125, 255, 0.13);
  transform: translateY(-1px);
}

.site-nav a[aria-current="page"]::after {
  right: 14px;
  bottom: 7px;
  left: 14px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.7);
}

.hero {
  position: relative;
  padding: 52px 0 34px;
  border-bottom: 0;
}

.hero-grid {
  position: relative;
  isolation: isolate;
  min-height: 680px;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.92fr);
  gap: 26px;
  border: 1px solid rgba(170, 185, 255, 0.18);
  border-radius: 38px;
  background:
    radial-gradient(circle at 12% 0%, rgba(124, 58, 237, 0.22), transparent 36%),
    linear-gradient(145deg, rgba(19, 24, 60, 0.9), rgba(8, 11, 31, 0.82));
  box-shadow: 0 36px 100px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.hero-grid::before {
  content: "";
  position: absolute;
  width: 600px;
  height: 600px;
  top: -340px;
  left: 18%;
  z-index: -1;
  border-radius: 50%;
  background: conic-gradient(from 220deg, rgba(34, 211, 238, 0.3), rgba(124, 58, 237, 0.46), rgba(236, 72, 153, 0.28), rgba(34, 211, 238, 0.3));
  filter: blur(70px);
  animation: ambient-spin 17s linear infinite reverse;
}

.hero .index-rail {
  position: absolute;
  top: 34px;
  left: 34px;
  z-index: 3;
  padding: 9px 13px;
  border: 1px solid rgba(144, 167, 255, 0.22);
  border-radius: 999px;
  background: rgba(8, 12, 34, 0.58);
  color: #dce2ff;
  font-size: 11px;
  letter-spacing: 0.08em;
  backdrop-filter: blur(14px);
}

.hero .index-rail span {
  writing-mode: horizontal-tb;
}

.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  padding: 116px 12px 84px 70px;
}

.eyebrow {
  width: fit-content;
  margin-bottom: 28px;
  padding: 8px 12px;
  border: 1px solid rgba(34, 211, 238, 0.24);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.07);
  color: #8eeaff;
  font-size: 11px;
  letter-spacing: 0.1em;
  box-shadow: inset 0 0 22px rgba(34, 211, 238, 0.05);
}

.hero h1 {
  max-width: none;
  margin-bottom: 26px;
  background: linear-gradient(105deg, #ffffff 8%, #b9c8ff 40%, #72e9ff 72%, #f4a8ff 100%);
  background-size: 180% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(68px, 8vw, 118px);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.065em;
  text-shadow: 0 0 44px rgba(93, 112, 255, 0.2);
  animation: title-shift 7s ease-in-out infinite alternate;
}

.hero h2 {
  max-width: 660px;
  margin-bottom: 22px;
  color: #f4f6ff;
  font-size: clamp(27px, 3vw, 40px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 620px;
  color: #b9c3e5;
  font-size: 16px;
}

.button-link {
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  background: linear-gradient(120deg, var(--violet), #4f7cff 56%, #159dbb);
  color: #ffffff;
  box-shadow: 0 12px 34px rgba(78, 80, 235, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  transition: transform 240ms ease, box-shadow 240ms ease, filter 240ms ease;
}

.button-link.secondary {
  border-color: rgba(151, 171, 255, 0.24);
  background: rgba(19, 25, 62, 0.7);
  color: #dce4ff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(12px);
}

.button-link:hover,
.button-link.secondary:hover {
  background: linear-gradient(120deg, #8b5cf6, #4f8dff 56%, #22d3ee);
  color: #ffffff;
  filter: saturate(120%);
  transform: translateY(-3px);
  box-shadow: 0 18px 45px rgba(78, 100, 255, 0.42), 0 0 26px rgba(34, 211, 238, 0.14);
}

.hero-facts {
  position: relative;
  align-content: end;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 28px;
  padding: 380px 18px 18px;
  overflow: hidden;
  border: 1px solid rgba(173, 189, 255, 0.17);
  border-radius: 30px;
  background:
    radial-gradient(circle at 50% 22%, rgba(34, 211, 238, 0.15), transparent 34%),
    linear-gradient(160deg, rgba(33, 42, 91, 0.5), rgba(8, 12, 35, 0.7));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.07);
}

.hero-facts::before {
  content: "";
  position: absolute;
  top: 76px;
  left: 50%;
  width: 238px;
  height: 238px;
  border: 1px solid rgba(178, 211, 255, 0.32);
  border-radius: 50%;
  background:
    radial-gradient(circle at 36% 30%, rgba(255, 255, 255, 0.62), transparent 8%),
    radial-gradient(circle at 42% 36%, #7deaff 0%, #596cff 34%, #7c3aed 60%, #ec4899 100%);
  box-shadow:
    0 0 62px rgba(99, 102, 241, 0.55),
    0 0 0 28px rgba(110, 123, 255, 0.06),
    0 0 0 29px rgba(144, 169, 255, 0.14),
    0 0 0 64px rgba(34, 211, 238, 0.025),
    0 0 0 65px rgba(34, 211, 238, 0.09);
  transform: translateX(-50%);
  animation: core-float 5.5s ease-in-out infinite alternate, core-hue 12s ease-in-out infinite;
}

.hero-facts::after {
  content: "凯";
  position: absolute;
  top: 137px;
  left: 50%;
  color: rgba(255, 255, 255, 0.94);
  font-size: 82px;
  font-weight: 800;
  line-height: 1;
  text-shadow: 0 0 30px rgba(255, 255, 255, 0.48), 0 0 62px rgba(34, 211, 238, 0.6);
  transform: translateX(-50%);
}

.fact {
  position: relative;
  z-index: 2;
  min-width: 0;
  min-height: 126px;
  padding: 17px 14px;
  border: 1px solid rgba(173, 190, 255, 0.15);
  border-radius: 17px;
  background: rgba(15, 20, 52, 0.66);
  backdrop-filter: blur(14px);
  transition: transform 240ms ease, border-color 240ms ease, background-color 240ms ease;
}

.fact:first-child {
  border-top: 1px solid rgba(173, 190, 255, 0.15);
}

.fact:hover {
  border-color: rgba(79, 219, 255, 0.36);
  background: rgba(27, 35, 82, 0.8);
  transform: translateY(-5px);
}

.fact-number {
  margin-bottom: 22px;
  color: #72e9ff;
  font-size: 11px;
  letter-spacing: 0.08em;
}

.fact strong {
  color: #ffffff;
  font-size: 14px;
}

.fact span:last-child {
  color: #9ea9cd;
  font-size: 11px;
}

.section {
  padding: 24px 0;
  border-bottom: 0;
}

.section-grid,
.page-title {
  overflow: hidden;
  border: 1px solid rgba(168, 184, 255, 0.15);
  border-radius: 32px;
  background: linear-gradient(145deg, rgba(17, 22, 55, 0.78), rgba(9, 12, 33, 0.76));
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(18px);
}

.section-grid {
  grid-template-columns: 72px minmax(0, 1fr);
}

.index-rail {
  border-right: 1px solid rgba(162, 180, 255, 0.14);
  background: linear-gradient(to bottom, rgba(124, 58, 237, 0.12), rgba(34, 211, 238, 0.04));
  color: #7ee8ff;
  text-shadow: 0 0 18px rgba(34, 211, 238, 0.42);
}

.section-content {
  padding: 84px 68px;
}

.section-heading {
  grid-template-columns: minmax(260px, 0.78fr) minmax(300px, 1fr);
  gap: 76px;
  margin-bottom: 48px;
}

.section-heading h2,
.page-title h1 {
  background: linear-gradient(110deg, #ffffff, #b7c5ff 55%, #76e7ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: clamp(40px, 4.8vw, 64px);
  font-weight: 750;
  line-height: 1.05;
}

.section-heading p,
.lead {
  color: #aeb8da;
}

.company-grid,
.contact-panel {
  gap: 14px;
  border: 0;
}

.company-copy,
.company-meta,
.contact-intro,
.contact-details {
  border: 1px solid rgba(166, 184, 255, 0.14);
  border-radius: 22px;
  background: rgba(18, 24, 59, 0.6);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.045);
}

.company-copy p {
  color: #d7dcf2;
}

.definition-list div {
  border-bottom-color: rgba(164, 181, 255, 0.13);
}

.definition-list dt {
  color: #8996c0;
}

.definition-list dd {
  color: #f8f9ff;
}

.service-grid,
.advantage-grid {
  gap: 14px;
  border: 0;
}

.service-card,
.advantage-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(166, 184, 255, 0.14);
  border-radius: 22px;
  background: linear-gradient(150deg, rgba(28, 35, 82, 0.72), rgba(12, 16, 44, 0.7));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: transform 260ms ease, border-color 260ms ease, box-shadow 260ms ease;
}

.service-card::before,
.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--violet), var(--cyan), transparent);
  opacity: 0.7;
}

.service-card:hover,
.advantage-card:hover {
  border-color: rgba(82, 218, 255, 0.36);
  box-shadow: 0 20px 50px rgba(35, 47, 133, 0.25), 0 0 34px rgba(34, 211, 238, 0.08);
  transform: translateY(-7px);
}

.service-card .number,
.advantage-card .number {
  color: #74e9ff;
  text-shadow: 0 0 18px rgba(34, 211, 238, 0.5);
}

.service-card h3,
.advantage-card h3 {
  color: #f9faff;
}

.service-card p,
.advantage-card p {
  color: #9facd1;
}

.faq-list {
  overflow: hidden;
  border: 1px solid rgba(166, 184, 255, 0.14);
  border-radius: 22px;
  background: rgba(13, 18, 48, 0.56);
}

.faq-list details {
  border-bottom-color: rgba(166, 184, 255, 0.12);
}

.faq-list summary {
  padding: 24px 62px 24px 26px;
  color: #eff2ff;
}

.faq-list summary::after {
  right: 24px;
  color: #69e6ff;
  text-shadow: 0 0 16px rgba(34, 211, 238, 0.48);
}

.faq-answer {
  padding: 0 58px 26px 26px;
  color: #aeb8da;
}

.contact-intro {
  background:
    radial-gradient(circle at 0% 0%, rgba(34, 211, 238, 0.18), transparent 38%),
    linear-gradient(135deg, rgba(93, 52, 208, 0.72), rgba(37, 55, 130, 0.72));
}

.contact-details a,
.prose a {
  color: #72e9ff;
}

.page-title {
  position: relative;
  isolation: isolate;
  margin-top: 48px;
  grid-template-columns: 72px minmax(0, 1fr);
  border-bottom: 1px solid rgba(168, 184, 255, 0.15);
}

.page-title::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -130px;
  top: -220px;
  z-index: -1;
  border-radius: 50%;
  background: conic-gradient(from 90deg, rgba(34, 211, 238, 0.24), rgba(124, 58, 237, 0.38), rgba(236, 72, 153, 0.22), rgba(34, 211, 238, 0.24));
  filter: blur(54px);
  animation: ambient-spin 16s linear infinite;
}

.page-title-content {
  padding: 94px 70px 76px;
}

.page-title .lead {
  max-width: 820px;
}

.content-layout {
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 48px;
}

.content-index {
  top: 108px;
  padding: 22px;
  border: 1px solid rgba(166, 184, 255, 0.14);
  border-radius: 18px;
  background: rgba(17, 23, 57, 0.7);
  color: #9da8cd;
  backdrop-filter: blur(15px);
}

.content-index strong {
  color: #70e8ff;
}

.prose {
  max-width: 830px;
}

.prose section {
  margin-bottom: 16px;
  padding: 30px 32px;
  border: 1px solid rgba(166, 184, 255, 0.13);
  border-radius: 20px;
  background: rgba(15, 20, 52, 0.54);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.prose section:last-child {
  border: 1px solid rgba(166, 184, 255, 0.13);
}

.prose h2,
.prose h3 {
  color: #f3f5ff;
}

.prose p,
.prose li {
  color: #aeb8da;
}

.notice {
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-left: 4px solid var(--cyan);
  border-radius: 14px;
  background: rgba(34, 211, 238, 0.07);
}

.site-footer {
  margin-top: 32px;
  border-top: 1px solid rgba(165, 183, 255, 0.12);
  background: linear-gradient(to bottom, rgba(7, 9, 27, 0.4), rgba(5, 7, 20, 0.92));
}

.site-footer-inner {
  padding: 64px 0 38px;
}

.footer-brand {
  background: linear-gradient(100deg, #ffffff, #7ee8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 28px;
}

.footer-company {
  color: #e2e6f7;
}

.footer-address,
.footer-bottom {
  color: #8995ba;
}

.footer-links a {
  border-bottom-color: rgba(166, 184, 255, 0.12);
  color: #9ba7cc;
  transition: color 200ms ease, border-color 200ms ease, transform 200ms ease;
}

.footer-links a:hover {
  border-bottom-color: rgba(34, 211, 238, 0.5);
  color: #77e8ff;
  transform: translateX(3px);
}

.footer-bottom {
  border-top-color: rgba(166, 184, 255, 0.12);
}

.legacy-page {
  background:
    radial-gradient(circle at 20% 20%, rgba(124, 58, 237, 0.34), transparent 36%),
    radial-gradient(circle at 80% 78%, rgba(34, 211, 238, 0.2), transparent 34%),
    #07091b;
}

.legacy-card {
  border: 1px solid rgba(172, 189, 255, 0.18);
  border-radius: 28px;
  background: rgba(15, 20, 52, 0.78);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
}

@supports (animation-timeline: view()) {
  .section-grid {
    animation: section-reveal linear both;
    animation-timeline: view();
    animation-range: entry 8% cover 30%;
  }
}

@keyframes aurora-drift {
  0% { background-position: 0% 0%, 100% 0%, 50% 100%, 0 0; }
  100% { background-position: 8% 5%, 92% 7%, 58% 92%, 0 0; }
}

@keyframes ambient-spin {
  to { transform: rotate(360deg); }
}

@keyframes brand-sheen {
  0%, 68% { transform: translateX(-62%) rotate(14deg); }
  86%, 100% { transform: translateX(62%) rotate(14deg); }
}

@keyframes title-shift {
  to { background-position: 100% 50%; }
}

@keyframes core-float {
  from { transform: translateX(-50%) translateY(-7px) scale(0.98); }
  to { transform: translateX(-50%) translateY(9px) scale(1.03); }
}

@keyframes core-hue {
  0%, 100% { filter: hue-rotate(0deg) saturate(115%); }
  50% { filter: hue-rotate(24deg) saturate(135%); }
}

@keyframes section-reveal {
  from { opacity: 0.3; transform: translateY(48px) scale(0.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 1040px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding: 120px 54px 28px;
  }

  .hero-facts {
    min-height: 520px;
    margin-top: 0;
    padding-top: 350px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

@media (max-width: 840px) {
  .site-header {
    padding-top: 8px;
  }

  .header-inner {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 14px 16px 0;
    border-radius: 18px;
  }

  .site-nav {
    width: 100%;
    gap: 4px;
    overflow-x: auto;
  }

  .site-nav a {
    flex: 0 0 auto;
    padding: 15px 12px 14px;
  }

  .section-grid,
  .page-title {
    grid-template-columns: 52px minmax(0, 1fr);
  }

  .section-content,
  .page-title-content {
    padding: 62px 34px;
  }

  .service-grid,
  .advantage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .content-index {
    position: static;
    border-bottom: 1px solid rgba(166, 184, 255, 0.14);
  }
}

@media (max-width: 640px) {
  .header-inner,
  .page-shell,
  .site-footer-inner {
    width: min(calc(100% - 24px), var(--max-width));
  }

  .hero {
    padding-top: 30px;
  }

  .hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 0;
    border-radius: 26px;
  }

  .hero .index-rail {
    top: 22px;
    left: 22px;
  }

  .hero-copy {
    padding: 94px 24px 24px;
  }

  .hero h1 {
    font-size: clamp(52px, 17vw, 72px);
  }

  .hero h2 {
    font-size: 25px;
  }

  .hero-copy > p:not(.eyebrow) {
    font-size: 15px;
  }

  .hero-facts {
    min-height: 600px;
    grid-template-columns: 1fr;
    margin: 12px;
    padding: 340px 14px 14px;
    border-radius: 22px;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    overflow: visible;
  }

  .site-nav a {
    min-width: 0;
    padding: 14px 2px 13px;
    font-size: 11px;
    text-align: center;
    white-space: nowrap;
  }

  .hero-facts::before {
    top: 65px;
    width: 210px;
    height: 210px;
  }

  .hero-facts::after {
    top: 120px;
    font-size: 74px;
  }

  .fact {
    min-height: 0;
  }

  .section-grid,
  .page-title {
    grid-template-columns: 1fr;
    border-radius: 24px;
  }

  .index-rail,
  .section-grid > .index-rail,
  .page-title > .index-rail {
    padding: 14px 22px;
    border-right: 0;
    border-bottom: 1px solid rgba(162, 180, 255, 0.14);
    text-align: left;
  }

  .index-rail span,
  .section-grid .index-rail span,
  .page-title .index-rail span {
    writing-mode: horizontal-tb;
  }

  .section-content,
  .page-title-content {
    padding: 42px 22px;
  }

  .section-heading h2,
  .page-title h1 {
    font-size: clamp(36px, 11vw, 48px);
  }

  .service-grid,
  .advantage-grid,
  .company-grid,
  .contact-panel,
  .site-footer-inner {
    grid-template-columns: 1fr;
  }

  .service-card,
  .advantage-card,
  .company-copy,
  .company-meta,
  .contact-intro,
  .contact-details,
  .prose section {
    padding: 24px;
  }

  .site-footer-inner {
    gap: 34px;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .legacy-card {
    padding: 34px 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  body,
  body::after,
  .brand-mark::after,
  .hero-grid::before,
  .hero h1,
  .hero-facts::before,
  .page-title::after,
  .section-grid {
    animation: none !important;
  }

  .button-link,
  .service-card,
  .advantage-card,
  .fact,
  .site-nav a {
    transition: none;
  }
}