:root {
  --ink: #121116;
  --ink-soft: #5f5b66;
  --paper: #f5f3ef;
  --paper-deep: #ebe8e1;
  --white: #fff;
  --violet: #6736e9;
  --violet-light: #9e7cff;
  --violet-dark: #321279;
  --line: rgba(18, 17, 22, 0.13);
  --container: min(1180px, calc(100% - 48px));
  --serif: "Songti SC", "STSong", "SimSun", serif;
  --sans: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

.container {
  width: var(--container);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  height: 86px;
  color: var(--white);
  border-bottom: 1px solid rgba(255, 255, 255, 0.11);
  transition: background 0.3s ease, height 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  height: 72px;
  color: var(--ink);
  background: rgba(245, 243, 239, 0.92);
  box-shadow: 0 8px 35px rgba(28, 16, 57, 0.08);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 43px;
  height: 43px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--white);
  box-shadow: 0 0 0 1px rgba(103, 54, 233, 0.12);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-size: 16px;
  letter-spacing: 0.14em;
}

.brand-copy small {
  font-size: 8px;
  letter-spacing: 0.2em;
  opacity: 0.66;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 13px;
}

.site-nav > a {
  position: relative;
  opacity: 0.78;
  transition: opacity 0.2s ease;
}

.site-nav > a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  inset: auto 0 -8px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
}

.site-nav > a:hover {
  opacity: 1;
}

.site-nav > a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-cta {
  padding: 11px 18px;
  color: var(--white);
  background: var(--violet);
  opacity: 1 !important;
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 760px;
  height: 100vh;
  max-height: 980px;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 68% 38%, rgba(131, 84, 255, 0.27), transparent 34%),
    radial-gradient(circle at 18% 90%, rgba(83, 40, 171, 0.28), transparent 35%),
    #101014;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.16;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: linear-gradient(to right, transparent, black 35%, black 80%, transparent);
}

.hero-grid {
  position: relative;
  z-index: 2;
  height: 100%;
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  align-items: center;
  gap: 72px;
  padding-top: 70px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 27px;
  color: var(--violet-light);
  font-size: 11px;
  letter-spacing: 0.22em;
}

.eyebrow span {
  width: 28px;
  height: 1px;
  background: currentColor;
}

.hero h1 {
  margin-bottom: 30px;
  font-family: var(--serif);
  font-size: clamp(56px, 6vw, 88px);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.hero h1 em {
  color: transparent;
  font-style: normal;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.74);
}

.hero-lead {
  max-width: 610px;
  margin-bottom: 35px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 16px;
  line-height: 1.95;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 0 25px;
  font-size: 13px;
  border: 1px solid transparent;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease;
}

.button:hover {
  transform: translateY(-3px);
}

.button.primary {
  color: var(--white);
  background: var(--violet);
}

.button.primary:hover {
  background: #7850ec;
}

.button.ghost {
  color: rgba(255, 255, 255, 0.85);
  border-color: rgba(255, 255, 255, 0.2);
}

.button.ghost:hover {
  border-color: rgba(255, 255, 255, 0.52);
}

.hero-meta {
  display: flex;
  gap: 38px;
  margin-top: 58px;
}

.hero-meta div {
  display: grid;
  gap: 7px;
}

.hero-meta strong {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 500;
}

.hero-meta span {
  color: rgba(255, 255, 255, 0.42);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.yin-field {
  position: relative;
  width: min(520px, 40vw);
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.yin-field::before,
.yin-field::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(158, 124, 255, 0.21);
}

.yin-field::before { inset: 7.5%; }
.yin-field::after { inset: -9%; border-style: dashed; animation: rotate 32s linear infinite; }

.field-grid {
  position: absolute;
  inset: 17%;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, transparent 0 23px, rgba(255,255,255,.07) 24px 25px);
}

.yin-core {
  position: absolute;
  inset: 25%;
  z-index: 2;
  overflow: hidden;
  border-radius: 50%;
  box-shadow: 0 0 75px rgba(115, 68, 245, 0.38);
}

.yin-core img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.node {
  position: absolute;
  z-index: 3;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: rgba(255, 255, 255, 0.74);
  background: rgba(16, 16, 20, 0.88);
  border: 1px solid rgba(158, 124, 255, 0.42);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 14px;
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.3);
}

.node-a { top: 4%; left: 24%; }
.node-b { top: 34%; right: -4%; }
.node-c { bottom: 4%; right: 22%; }
.node-d { bottom: 20%; left: -1%; }

.visual-caption {
  position: absolute;
  z-index: 3;
  right: -4%;
  bottom: 12%;
  display: grid;
  gap: 6px;
  padding: 17px 21px;
  background: rgba(16, 16, 20, 0.88);
  border-left: 2px solid var(--violet-light);
  backdrop-filter: blur(10px);
}

.visual-caption span {
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.12em;
}

.visual-caption small {
  color: rgba(255, 255, 255, 0.4);
  font-size: 8px;
  letter-spacing: 0.18em;
}

.hero-orbit {
  position: absolute;
  border-radius: 50%;
  filter: blur(1px);
}

.orbit-one {
  width: 280px;
  height: 280px;
  top: -170px;
  right: 13%;
  border: 40px solid rgba(103, 54, 233, 0.1);
}

.orbit-two {
  width: 180px;
  height: 180px;
  bottom: -100px;
  left: 42%;
  border: 1px solid rgba(158, 124, 255, 0.2);
}

.scroll-hint {
  position: absolute;
  z-index: 4;
  left: 28px;
  bottom: 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 8px;
  letter-spacing: 0.26em;
  transform: rotate(-90deg);
  transform-origin: left center;
}

.scroll-hint i {
  position: relative;
  width: 50px;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.2);
}

.scroll-hint i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--violet-light);
  animation: scrollLine 2s ease-in-out infinite;
}

.section {
  position: relative;
  padding: 132px 0;
}

.section-index {
  margin-bottom: 22px;
  color: var(--violet);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.kicker {
  margin-bottom: 18px;
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: 0.2em;
}

.section h2 {
  margin-bottom: 0;
  font-family: var(--serif);
  font-size: clamp(38px, 4.2vw, 60px);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.section-intro {
  display: grid;
  grid-template-columns: 1fr 3fr;
  align-items: start;
  margin-bottom: 88px;
}

.about-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 110px;
  align-items: start;
}

.about-quote {
  position: relative;
  min-height: 330px;
  padding: 60px 48px;
  color: var(--white);
  background: var(--violet-dark);
}

.about-quote::after {
  content: "";
  position: absolute;
  width: 72px;
  height: 72px;
  right: -20px;
  bottom: -20px;
  background: var(--violet);
  opacity: 0.65;
}

.quote-mark {
  position: absolute;
  top: 14px;
  right: 30px;
  color: rgba(255, 255, 255, 0.11);
  font-family: Georgia, serif;
  font-size: 130px;
  line-height: 1;
}

.about-quote blockquote {
  position: relative;
  margin: 30px 0 32px;
  font-family: var(--serif);
  font-size: 25px;
  line-height: 1.75;
}

.about-quote p {
  color: rgba(255, 255, 255, 0.48);
  font-size: 11px;
}

.about-copy > p {
  margin-bottom: 23px;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2;
}

.about-copy strong {
  color: var(--ink);
}

.vision-mission {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  margin-top: 42px;
}

.vision-mission article {
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.vision-mission span,
.service-content > p:first-child {
  color: var(--violet);
  font-size: 9px;
  letter-spacing: 0.17em;
}

.vision-mission h3 {
  margin: 13px 0 10px;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 500;
}

.vision-mission p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.75;
}

.services {
  background: var(--paper-deep);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 50px;
  margin-bottom: 70px;
}

.heading-note {
  max-width: 360px;
  margin: 0 0 8px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.85;
}

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

.service-card {
  display: grid;
  grid-template-columns: 78px 95px 1fr;
  gap: 26px;
  align-items: start;
  padding: 48px 25px;
  border-bottom: 1px solid var(--line);
  transition: color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.service-card:hover,
.service-card.featured {
  color: var(--white);
  background: var(--violet-dark);
  transform: translateX(8px);
}

.service-no {
  color: var(--violet);
  font-family: var(--serif);
  font-size: 17px;
}

.service-card:hover .service-no,
.service-card.featured .service-no,
.service-card:hover .service-content > p:first-child,
.service-card.featured .service-content > p:first-child {
  color: var(--violet-light);
}

.service-icon {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  color: var(--violet);
  border: 1px solid currentColor;
}

.service-icon svg {
  width: 34px;
  height: 34px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.service-card:hover .service-icon,
.service-card.featured .service-icon {
  color: var(--violet-light);
}

.service-content {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  column-gap: 48px;
}

.service-content > p:first-child {
  grid-column: 1 / -1;
  margin-bottom: 13px;
}

.service-content h3 {
  margin-bottom: 18px;
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 500;
}

.service-desc {
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
}

.service-card:hover .service-desc,
.service-card.featured .service-desc {
  color: rgba(255, 255, 255, 0.56);
}

.service-content ul {
  grid-column: 2;
  grid-row: 2 / span 2;
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-content li {
  position: relative;
  padding: 9px 0 9px 18px;
  color: var(--ink-soft);
  font-size: 13px;
  border-bottom: 1px solid var(--line);
}

.service-content li::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 2px;
  width: 5px;
  height: 5px;
  background: var(--violet);
}

.service-card:hover li,
.service-card.featured li {
  color: rgba(255, 255, 255, 0.66);
  border-color: rgba(255, 255, 255, 0.12);
}

.service-card:hover li::before,
.service-card.featured li::before {
  background: var(--violet-light);
}

.section-heading.compact {
  margin-bottom: 58px;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.advantage-card {
  position: relative;
  min-height: 360px;
  padding: 42px 34px;
  overflow: hidden;
  border: 1px solid var(--line);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.advantage-card:hover {
  transform: translateY(-9px);
  border-color: rgba(103, 54, 233, 0.38);
  box-shadow: 0 24px 65px rgba(49, 18, 121, 0.11);
}

.advantage-card > span {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  margin-bottom: 72px;
  color: var(--white);
  background: var(--violet);
  border-radius: 50%;
  font-family: var(--serif);
}

.advantage-card h3 {
  margin-bottom: 18px;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
}

.advantage-card p {
  max-width: 290px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.9;
}

.advantage-card i {
  position: absolute;
  right: -6px;
  bottom: 18px;
  color: rgba(18, 17, 22, 0.04);
  font-size: 32px;
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.culture {
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
}

.culture::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 22% 48%, rgba(103, 54, 233, 0.24), transparent 30%);
}

.culture-mark {
  position: absolute;
  top: 50%;
  left: 8%;
  color: rgba(255, 255, 255, 0.025);
  font-family: var(--serif);
  font-size: 480px;
  line-height: 1;
  transform: translateY(-50%);
}

.culture-layout {
  position: relative;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 110px;
  align-items: center;
}

.culture .kicker {
  color: rgba(255, 255, 255, 0.44);
}

.culture-copy > p:last-child {
  max-width: 460px;
  margin-top: 32px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 14px;
  line-height: 2;
}

.values {
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.value-item {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 25px;
  align-items: center;
  padding: 27px 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.value-item > span {
  color: var(--violet-light);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.value-item h3 {
  margin-bottom: 7px;
  font-family: var(--serif);
  font-size: 23px;
  font-weight: 500;
}

.value-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.45);
  font-size: 12px;
}

.contact {
  padding-bottom: 110px;
}

.contact-panel {
  color: var(--white);
  background: var(--violet);
}

.contact-topline {
  display: flex;
  justify-content: space-between;
  padding: 20px 35px;
  font-size: 9px;
  letter-spacing: 0.18em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.contact-content {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 80px;
  align-items: end;
  padding: 68px;
}

.contact .kicker {
  color: rgba(255, 255, 255, 0.6);
}

.contact-action p {
  margin-bottom: 27px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.85;
}

.button.light {
  color: var(--ink);
  background: var(--white);
}

.contact-action small {
  display: block;
  margin-top: 13px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 10px;
}

.site-footer {
  padding: 34px 0;
  color: rgba(255, 255, 255, 0.5);
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 35px;
  align-items: center;
  font-size: 10px;
  letter-spacing: 0.08em;
}

.footer-brand {
  color: var(--white);
}

.footer-brand .brand-mark {
  width: 38px;
  height: 38px;
}

.footer-grid p {
  margin: 0;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

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

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

@keyframes scrollLine {
  0% { transform: translateX(-100%); }
  60%, 100% { transform: translateX(100%); }
}

@media (max-width: 980px) {
  :root {
    --container: min(100% - 36px, 780px);
  }

  .site-nav {
    gap: 18px;
  }

  .site-nav > a:not(.nav-cta) {
    display: none;
  }

  .hero {
    min-height: 760px;
    height: auto;
    max-height: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    min-height: 760px;
    padding-top: 130px;
    padding-bottom: 80px;
  }

  .hero-visual {
    display: none;
  }

  .hero-copy {
    max-width: 720px;
  }

  .section-intro,
  .about-layout,
  .culture-layout {
    grid-template-columns: 1fr;
  }

  .section-intro {
    gap: 18px;
  }

  .about-layout {
    gap: 52px;
  }

  .about-quote {
    max-width: 580px;
  }

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

  .service-content ul {
    grid-column: auto;
    grid-row: auto;
    margin-top: 10px;
  }

  .advantage-card {
    padding: 34px 25px;
  }

  .culture-layout {
    gap: 60px;
  }

  .contact-content {
    padding: 54px 45px;
    gap: 45px;
  }
}

@media (max-width: 720px) {
  :root {
    --container: calc(100% - 32px);
  }

  .site-header,
  .site-header.scrolled {
    height: 68px;
  }

  .site-nav {
    position: fixed;
    inset: 68px 0 auto;
    display: grid;
    gap: 0;
    padding: 18px;
    color: var(--ink);
    background: var(--paper);
    box-shadow: 0 20px 40px rgba(18, 17, 22, 0.12);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-15px);
    transition: 0.25s ease;
  }

  .site-nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .site-nav > a,
  .site-nav > a:not(.nav-cta) {
    display: block;
    padding: 15px;
  }

  .nav-cta {
    margin-top: 7px;
    text-align: center;
  }

  .menu-toggle {
    width: 42px;
    height: 42px;
    display: grid;
    place-content: center;
    gap: 6px;
    padding: 0;
    color: inherit;
    background: transparent;
    border: 0;
  }

  .menu-toggle span:not(.sr-only) {
    width: 23px;
    height: 1px;
    background: currentColor;
    transition: transform 0.25s ease;
  }

  .hero {
    min-height: 800px;
  }

  .hero-grid {
    min-height: 800px;
    padding-top: 116px;
  }

  .hero h1 {
    font-size: clamp(48px, 14vw, 67px);
  }

  .hero-lead {
    font-size: 14px;
  }

  .hero-meta {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .scroll-hint {
    display: none;
  }

  .section {
    padding: 90px 0;
  }

  .section-intro,
  .section-heading {
    margin-bottom: 50px;
  }

  .section-heading {
    display: block;
  }

  .heading-note {
    margin-top: 25px;
  }

  .about-quote {
    min-height: auto;
    padding: 40px 30px;
  }

  .about-quote blockquote {
    font-size: 21px;
  }

  .vision-mission {
    grid-template-columns: 1fr;
  }

  .service-card {
    grid-template-columns: 44px 1fr;
    padding: 38px 16px;
  }

  .service-icon {
    grid-column: 2;
    grid-row: 1;
  }

  .service-content {
    grid-column: 2;
  }

  .service-card:hover,
  .service-card.featured {
    transform: none;
  }

  .service-content h3 {
    font-size: 23px;
  }

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

  .advantage-card {
    min-height: 310px;
  }

  .advantage-card > span {
    margin-bottom: 48px;
  }

  .culture-mark {
    left: -25%;
    font-size: 350px;
  }

  .value-item {
    grid-template-columns: 42px 1fr;
  }

  .contact-content {
    grid-template-columns: 1fr;
    padding: 40px 26px;
  }

  .contact-topline {
    padding: 17px 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

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

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}