:root {
  --bg: #030303;
  --bg-soft: #09090d;
  --text: #f7f7f7;
  --muted: #a4a4ad;
  --line: rgba(255, 255, 255, 0.11);
  --purple: #5846DC;
  --purple-soft: rgba(88, 70, 220, 0.22);
  --card: rgba(255, 255, 255, 0.045);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6vw;
  background: rgba(3, 3, 3, 0.74);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.22em;
  font-size: 14px;
  font-weight: 600;
}

.brand img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  border-radius: 50%;
}

.nav-links {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a {
  position: relative;
  transition: color 0.25s ease, text-shadow 0.25s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.active {
  color: var(--purple);
  text-shadow: 0 0 18px rgba(88, 70, 220, 0.65);
}

.lang-toggle {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 9px 16px;
  cursor: pointer;
  transition: all 0.25s ease;
}

.lang-toggle:hover {
  border-color: var(--purple);
  box-shadow: 0 0 24px var(--purple-soft);
}

.section {
  position: relative;
  min-height: 100vh;
  padding: 120px 6vw 90px;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: #000;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 112% 0%, rgba(88, 70, 220, 0.24), transparent 34%),
    #000;
  pointer-events: none;
}

.glow {
  position: absolute;
  width: 720px;
  height: 720px;
  border-radius: 50%;
  background: rgba(88, 70, 220, 0.24);
  filter: blur(145px);
  opacity: 0.9;
  pointer-events: none;
}

.glow-one {
  display: none;
}

.glow-two {
  top: -30%;
  right: -24%;
  opacity: 0.82;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 980px;
}

.hero-logo-mark {
  width: clamp(160px, 24vw, 300px);
  height: clamp(160px, 24vw, 300px);
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 18px;
}

.hero-wordmark {
  display: block;
  width: min(760px, 86vw);
  height: auto;
  margin: 0 auto;
}

.hero-subbrand {
  margin: 4px 0 0;
  color: var(--text);
  font-size: clamp(24px, 3vw, 42px);
  letter-spacing: 0.24em;
  text-indent: 0.24em;
  font-weight: 500;
}

.hero-subbrand:empty {
  display: none;
}

.slogan {
  margin: 24px 0 36px;
  font-size: clamp(20px, 2.6vw, 36px);
  color: var(--text);
  letter-spacing: 0;
  text-transform: none;
}

html[lang="zh-CN"] .hero-subbrand {
  margin-top: -2px;
}

html[lang="zh-CN"] .slogan {
  margin-top: 34px;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 150px;
  padding: 14px 24px;
  border-radius: 999px;
  background: var(--purple);
  color: white;
  font-weight: 600;
  box-shadow: 0 0 35px rgba(88, 70, 220, 0.36);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.primary-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 52px rgba(88, 70, 220, 0.5);
}

.section-inner {
  max-width: 1120px;
  margin: 0 auto;
}

.eyebrow {
  color: var(--purple);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 13px;
  font-weight: 700;
  margin: 0 0 18px;
}

h2 {
  margin: 0 0 54px;
  font-size: clamp(38px, 5.5vw, 76px);
  letter-spacing: -0.05em;
  line-height: 1;
}

.about {
  overflow: hidden;
  background: #000;
}

.about::before {
  content: "";
  position: absolute;
  left: -18%;
  top: 28%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: rgba(88, 70, 220, 0.26);
  filter: blur(130px);
  opacity: 0.86;
  pointer-events: none;
}

.about-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(56px, 7vw, 120px);
  max-width: 1180px;
  align-items: start;
}

.about-kicker {
  margin: 0;
  color: var(--purple);
  font-size: clamp(34px, 4.6vw, 64px);
  font-weight: 700;
  letter-spacing: 0.11em;
  line-height: 1.05;
  text-transform: uppercase;
}

.about-sections {
  display: grid;
  gap: 58px;
}

.about-block h2 {
  margin: 0 0 22px;
  font-size: clamp(30px, 4vw, 46px);
  letter-spacing: 0;
  line-height: 1.08;
  font-weight: 600;
}

.about-block p {
  max-width: 760px;
  margin: 0 0 16px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.75;
}

.about-block p:last-child {
  margin-bottom: 0;
}

.about-why-text {
  text-align: justify;
  text-align-last: left;
}

.about-list {
  display: grid;
  gap: 8px;
}

.about-list p {
  margin-bottom: 0;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.text-card {
  min-height: 280px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--card);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.text-card.wide {
  grid-column: 1 / -1;
  min-height: auto;
}

.text-card h3 {
  margin: 0 0 22px;
  font-size: 24px;
}

.text-card p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

.text-card p:last-child {
  margin-bottom: 0;
}

.contact {
  overflow: hidden;
  display: flex;
  align-items: center;
  background: #000;
}

.contact::before {
  content: "";
  position: absolute;
  top: 20%;
  right: -18%;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: rgba(88, 70, 220, 0.22);
  filter: blur(130px);
  opacity: 0.76;
  pointer-events: none;
}

.contact-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: calc(100vh - 210px);
  width: 100%;
  max-width: 1120px;
  text-align: center;
}

.contact-heading {
  color: var(--purple);
  font-weight: 700;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.contact-heading p {
  margin: 0 0 8px;
  font-size: clamp(34px, 4.6vw, 64px);
  line-height: 1.05;
}

.contact-heading h2 {
  margin: 0;
  color: var(--purple);
  font-size: clamp(34px, 4.6vw, 64px);
  font-weight: 700;
  letter-spacing: 0.11em;
  line-height: 1.05;
}

.contact-message {
  align-self: center;
  justify-self: center;
  max-width: 760px;
  margin: 0;
  color: var(--text);
  font-size: clamp(24px, 3vw, 42px);
  line-height: 1.45;
  font-weight: 500;
}

.contact-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.contact-item {
  display: flex;
  min-height: 118px;
  align-items: flex-start;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  transition: color 0.25s ease, transform 0.25s ease;
}

.contact-item:hover {
  transform: translateY(-2px);
  color: var(--purple);
}

.contact-item span {
  color: var(--muted);
  font-size: 15px;
}

.contact-item strong {
  color: var(--text);
  font-size: clamp(16px, 2vw, 22px);
  font-weight: 500;
  word-break: break-word;
}

.site-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 42px 6vw;
  border-top: 1px solid var(--line);
  background: #020202;
  color: var(--muted);
}

.site-footer strong {
  display: block;
  color: var(--text);
  letter-spacing: 0.22em;
  margin-bottom: 8px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .site-header {
    height: 68px;
    padding: 0 20px;
  }

  .brand span {
    display: none;
  }

  .nav-links {
    gap: 16px;
    font-size: 13px;
    max-width: calc(100vw - 140px);
  }

  .lang-toggle {
    padding: 8px 12px;
  }

  .section {
    padding: 104px 20px 70px;
  }

  .hero::before {
    background:
      radial-gradient(circle at 122% -8%, rgba(88, 70, 220, 0.22), transparent 40%),
      #000;
  }

  .glow {
    width: 480px;
    height: 480px;
    filter: blur(125px);
  }

  .glow-one {
    left: -58%;
    bottom: -26%;
  }

  .glow-two {
    top: -36%;
    right: -72%;
  }

  .hero-subbrand {
    letter-spacing: 0.16em;
    text-indent: 0.16em;
  }

  .hero-wordmark {
    width: min(620px, 92vw);
  }

  .about::before {
    display: none;
  }

  .about-inner {
    display: block;
    max-width: 100%;
  }

  .about-kicker {
    margin-bottom: 42px;
    font-size: 34px;
    line-height: 1.05;
  }

  .about-sections {
    gap: 44px;
  }

  .about-block h2 {
    font-size: 30px;
  }

  .about-block p {
    font-size: 17px;
    line-height: 1.7;
  }

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

  .text-card {
    padding: 26px;
  }

  .text-card p {
    font-size: 16px;
  }

  .contact-inner {
    min-height: calc(100vh - 174px);
  }

  .contact::before {
    display: none;
  }

  .contact-message {
    font-size: 24px;
  }

  .contact-list {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-item {
    flex-direction: column;
    align-items: flex-start;
    min-height: 92px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}