:root {
  --bg: #050816;
  --bg-deep: #03040d;
  --ink: #f8fbff;
  --soft: rgba(248, 251, 255, 0.76);
  --muted: rgba(248, 251, 255, 0.56);
  --line: rgba(164, 196, 255, 0.18);
  --glass: rgba(10, 18, 44, 0.54);
  --glass-strong: rgba(13, 24, 58, 0.72);
  --cyan: #77e7ff;
  --blue: #8da2ff;
  --violet: #c68cff;
  --gold: #ffd89a;
  --rose: #ff8db3;
  --shadow: 0 30px 100px rgba(0, 0, 0, 0.42);
  --radius: 28px;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 18% 16%, rgba(119, 231, 255, 0.16), transparent 30vw),
    radial-gradient(circle at 82% 8%, rgba(198, 140, 255, 0.18), transparent 34vw),
    radial-gradient(circle at 50% 88%, rgba(255, 141, 179, 0.12), transparent 38vw),
    linear-gradient(180deg, #050816 0%, #070a1c 44%, #03040d 100%);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 86px 86px;
  mask-image: linear-gradient(180deg, transparent, #000 16%, #000 78%, transparent);
}

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

#starfield {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100vw;
  height: 100vh;
  background: transparent;
}

.cosmic-noise {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: 0.32;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.14) 0 1px, transparent 1.4px),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.1) 0 1px, transparent 1.3px);
  background-size: 180px 180px, 220px 220px;
  mix-blend-mode: screen;
}

.aurora {
  position: fixed;
  z-index: -1;
  width: 46vw;
  height: 46vw;
  min-width: 420px;
  min-height: 420px;
  border-radius: 999px;
  filter: blur(64px);
  opacity: 0.28;
  pointer-events: none;
  animation: auroraFloat 16s ease-in-out infinite alternate;
}

.aurora-one {
  top: -18vw;
  left: -14vw;
  background: radial-gradient(circle, rgba(119, 231, 255, 0.9), rgba(141, 162, 255, 0.36) 45%, transparent 70%);
}

.aurora-two {
  right: -18vw;
  bottom: 8vw;
  background: radial-gradient(circle, rgba(198, 140, 255, 0.82), rgba(255, 141, 179, 0.32) 48%, transparent 72%);
  animation-delay: -6s;
}

.site-header {
  position: fixed;
  z-index: 50;
  top: 18px;
  left: clamp(14px, 4vw, 54px);
  right: clamp(14px, 4vw, 54px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(4, 8, 22, 0.48);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(22px) saturate(135%);
  transition: transform 220ms ease, background 220ms ease, border-color 220ms ease;
}

.site-header.is-scrolled {
  background: rgba(4, 8, 22, 0.76);
  border-color: rgba(119, 231, 255, 0.22);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #06101f;
  background:
    radial-gradient(circle at 35% 25%, #fff 0 10%, transparent 12%),
    linear-gradient(135deg, var(--cyan), var(--blue) 48%, var(--violet));
  box-shadow: 0 0 28px rgba(119, 231, 255, 0.52), inset 0 0 18px rgba(255, 255, 255, 0.45);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 20px;
  font-weight: 900;
}

.brand-copy {
  display: grid;
  line-height: 1.1;
}

.brand-copy strong {
  font-size: 14px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.brand-copy small {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: clamp(8px, 2.2vw, 24px);
  padding-right: 6px;
  color: var(--soft);
  font-size: 14px;
  font-weight: 700;
}

.nav a {
  position: relative;
  padding: 8px 0;
  transition: color 180ms ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: #fff;
}

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

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  align-items: center;
  gap: clamp(28px, 6vw, 88px);
  padding: 150px clamp(18px, 6vw, 92px) 92px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 7% 6% auto auto;
  width: min(42vw, 520px);
  height: min(42vw, 520px);
  border-radius: 50%;
  background:
    radial-gradient(circle at 40% 34%, rgba(255, 255, 255, 0.28), transparent 0 9%),
    radial-gradient(circle at 50% 50%, rgba(141, 162, 255, 0.26), rgba(119, 231, 255, 0.08) 42%, transparent 66%);
  filter: blur(1px);
  opacity: 0.52;
  pointer-events: none;
}

.stellar-frame {
  position: absolute;
  inset: 124px clamp(18px, 6vw, 92px) 62px;
  z-index: 0;
  pointer-events: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 34px;
  mask-image: linear-gradient(135deg, #000 0%, transparent 44%, #000 100%);
}

.stellar-frame span {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 26px var(--cyan);
}

.stellar-frame span:nth-child(1) {
  top: -6px;
  left: 12%;
}

.stellar-frame span:nth-child(2) {
  right: -6px;
  top: 42%;
  background: var(--gold);
  box-shadow: 0 0 26px var(--gold);
}

.stellar-frame span:nth-child(3) {
  bottom: -6px;
  left: 68%;
  background: var(--violet);
  box-shadow: 0 0 26px var(--violet);
}

.hero-copy,
.mission-card,
.section {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-label,
.card-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.26em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 44px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan));
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 880px;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(74px, 15vw, 188px);
  font-weight: 900;
  line-height: 0.86;
  letter-spacing: -0.08em;
  background: linear-gradient(118deg, #fff 5%, #dff8ff 24%, var(--cyan) 46%, var(--violet) 72%, #fff 92%);
  background-size: 180% 180%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 60px rgba(119, 231, 255, 0.22);
  animation: titleShimmer 8s ease-in-out infinite alternate;
}

h2 {
  margin: 0;
  font-size: clamp(34px, 5vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.06em;
}

h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.28;
}

.hero-lead {
  max-width: 720px;
  margin: 30px 0 0;
  color: var(--soft);
  font-size: clamp(18px, 2vw, 24px);
}

.hero-note {
  max-width: 700px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 18px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  position: relative;
  min-height: 54px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 900;
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.28), transparent);
  transform: translateX(-120%);
  transition: transform 500ms ease;
}

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

.button:hover::before,
.button:focus-visible::before {
  transform: translateX(120%);
}

.button-primary {
  color: #04101f;
  background: linear-gradient(135deg, var(--cyan), #f2fcff 38%, var(--violet));
  box-shadow: 0 0 34px rgba(119, 231, 255, 0.34);
}

.button-ghost {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 0 1px rgba(119, 231, 255, 0.08);
}

.mission-card,
.star-card,
.timeline-panel,
.contact-panel {
  border: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.04)),
    var(--glass);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(24px) saturate(128%);
}

.mission-card {
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  border-radius: var(--radius);
  overflow: hidden;
}

.mission-card::after {
  content: "";
  position: absolute;
  inset: auto -24% -26% -24%;
  height: 52%;
  background: radial-gradient(ellipse, rgba(119, 231, 255, 0.28), transparent 64%);
  pointer-events: none;
}

.orbit-system {
  position: absolute;
  inset: 30px 20px auto;
  height: 250px;
}

.orbit,
.planet {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.orbit {
  border: 1px solid rgba(119, 231, 255, 0.22);
  border-radius: 50%;
}

.orbit-a {
  width: 220px;
  height: 88px;
  transform: translate(-50%, -50%) rotate(-18deg);
}

.orbit-b {
  width: 290px;
  height: 126px;
  transform: translate(-50%, -50%) rotate(24deg);
  border-color: rgba(198, 140, 255, 0.2);
}

.planet-main {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, #fff, transparent 0 12%),
    radial-gradient(circle at 38% 30%, #f8fdff, var(--cyan) 24%, var(--blue) 58%, #4a2b87 100%);
  box-shadow: 0 0 46px rgba(119, 231, 255, 0.55), inset -18px -18px 34px rgba(0, 0, 0, 0.3);
}

.planet-one,
.planet-two {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  transform-origin: -88px -6px;
  animation: orbitTiny 8s linear infinite;
}

.planet-one {
  background: var(--gold);
  box-shadow: 0 0 18px var(--gold);
}

.planet-two {
  width: 16px;
  height: 16px;
  background: var(--rose);
  box-shadow: 0 0 18px var(--rose);
  animation-duration: 12s;
  animation-direction: reverse;
}

.card-kicker {
  color: var(--gold);
}

.mission-card h2 {
  font-size: clamp(28px, 3vw, 42px);
  letter-spacing: -0.04em;
}

.mission-card dl {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
}

.mission-card dl div {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.mission-card dt {
  color: var(--cyan);
  font-weight: 900;
}

.mission-card dd {
  margin: 0;
  color: var(--soft);
}

.section {
  padding: 110px clamp(18px, 6vw, 92px);
}

.about,
.orbit-section,
.contact {
  margin: 0 clamp(14px, 3vw, 42px) 32px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: calc(var(--radius) + 10px);
  background: linear-gradient(135deg, rgba(13, 24, 58, 0.72), rgba(5, 8, 22, 0.64));
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.section-split,
.orbit-section,
.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.76fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.copy-stack {
  display: grid;
  gap: 18px;
  color: var(--soft);
  font-size: clamp(16px, 1.8vw, 21px);
}

.copy-stack p,
.section-head p,
.orbit-copy p,
.contact p,
.star-card p,
.timeline-panel p {
  margin: 0;
  color: var(--muted);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 28px;
  margin-bottom: 30px;
}

.section-head p {
  max-width: 480px;
  font-size: 17px;
}

.starmap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.star-card {
  position: relative;
  min-height: 310px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 26px;
  padding: 24px;
  border-radius: 26px;
  overflow: hidden;
  transition: transform 220ms ease, border-color 220ms ease, background 220ms ease;
}

.star-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(119, 231, 255, 0.26), transparent 34%);
  opacity: 0;
  transition: opacity 180ms ease;
  pointer-events: none;
}

.star-card:hover {
  transform: translateY(-8px);
  border-color: rgba(119, 231, 255, 0.38);
}

.star-card:hover::before {
  opacity: 1;
}

.card-index {
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.32);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 58px;
  line-height: 1;
}

.star-card h3,
.star-card p,
.star-card a,
.card-index {
  position: relative;
  z-index: 1;
}

.star-card a {
  width: fit-content;
  color: var(--cyan);
  border-bottom: 1px solid rgba(119, 231, 255, 0.62);
  font-weight: 900;
}

.star-card.featured {
  background:
    radial-gradient(circle at 30% 0%, rgba(255, 216, 154, 0.26), transparent 34%),
    linear-gradient(135deg, rgba(119, 231, 255, 0.22), rgba(198, 140, 255, 0.18)),
    var(--glass-strong);
}

.orbit-copy {
  align-self: center;
}

.orbit-copy p {
  margin-top: 22px;
  font-size: 18px;
}

.kit-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.kit-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid rgba(119, 231, 255, 0.22);
  border-radius: 999px;
  color: rgba(248, 251, 255, 0.86);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 18px rgba(119, 231, 255, 0.05);
  font-size: 14px;
  font-weight: 800;
}

.timeline-panel {
  display: grid;
  gap: 0;
  border-radius: 28px;
  overflow: hidden;
}

.timeline-panel article {
  display: grid;
  gap: 8px;
  padding: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.timeline-panel article:last-child {
  border-bottom: 0;
}

.timeline-panel time {
  color: var(--gold);
  font-weight: 900;
  letter-spacing: 0.12em;
}

.contact {
  align-items: center;
}

.contact-panel {
  display: grid;
  gap: 12px;
  padding: 18px;
  border-radius: 28px;
}

.wechat-panel {
  justify-items: stretch;
}

.qr-real-card {
  display: grid;
  place-items: center;
  padding: 12px;
  border: 1px solid rgba(119, 231, 255, 0.26);
  border-radius: 24px;
  background:
    radial-gradient(circle at 50% 0%, rgba(119, 231, 255, 0.2), transparent 44%),
    rgba(255, 255, 255, 0.06);
  box-shadow: inset 0 0 22px rgba(119, 231, 255, 0.06);
}

.qr-real-card img {
  display: block;
  width: min(100%, 360px);
  height: auto;
  border-radius: 8px;
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.36);
}

.qr-placeholder {
  position: relative;
  min-height: 240px;
  display: grid;
  place-items: center;
  gap: 8px;
  padding: 24px;
  border: 1px solid rgba(119, 231, 255, 0.26);
  border-radius: 22px;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(119, 231, 255, 0.12), rgba(198, 140, 255, 0.1)),
    rgba(255, 255, 255, 0.05);
}

.qr-placeholder::before {
  content: "";
  position: absolute;
  inset: 24px;
  border-radius: 18px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.72) 12px, transparent 12px) 0 0 / 34px 34px,
    linear-gradient(rgba(255, 255, 255, 0.52) 12px, transparent 12px) 0 0 / 34px 34px,
    radial-gradient(circle at 24px 24px, rgba(119, 231, 255, 0.9) 0 8px, transparent 9px) 0 0 / 68px 68px;
  opacity: 0.18;
  mask-image: radial-gradient(circle, transparent 0 34%, #000 36%);
}

.qr-placeholder span {
  position: relative;
  z-index: 1;
  width: 74px;
  height: 74px;
  border-radius: 22px;
  background:
    radial-gradient(circle at 35% 30%, #fff, transparent 0 12%),
    linear-gradient(135deg, var(--cyan), var(--blue), var(--violet));
  box-shadow: 0 0 34px rgba(119, 231, 255, 0.42);
}

.qr-placeholder strong,
.qr-placeholder small {
  position: relative;
  z-index: 1;
}

.qr-placeholder strong {
  font-size: 22px;
}

.qr-placeholder small {
  color: var(--muted);
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.contact-panel a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  font-weight: 900;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.contact-panel a:first-child {
  color: #06101f;
  background: linear-gradient(135deg, var(--cyan), #fff, var(--violet));
}

.contact-panel a:hover,
.contact-panel a:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(119, 231, 255, 0.4);
}

.footer {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 28px clamp(18px, 6vw, 92px);
  color: var(--muted);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(3, 4, 13, 0.72);
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer a:hover {
  color: var(--cyan);
  text-decoration: underline;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@keyframes auroraFloat {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(7vw, 4vw, 0) scale(1.08);
  }
}

@keyframes titleShimmer {
  from {
    background-position: 0% 50%;
  }
  to {
    background-position: 100% 50%;
  }
}

@keyframes orbitTiny {
  from {
    transform: rotate(0deg) translateX(122px) rotate(0deg);
  }
  to {
    transform: rotate(360deg) translateX(122px) rotate(-360deg);
  }
}

@media (max-width: 1120px) {
  .hero,
  .section-split,
  .orbit-section,
  .contact {
    grid-template-columns: 1fr;
  }

  .mission-card {
    min-height: 430px;
  }

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

@media (max-width: 760px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    border-radius: 28px;
  }

  .brand-copy {
    display: none;
  }

  .nav {
    gap: 10px 14px;
    font-size: 13px;
  }

  .hero {
    min-height: 92svh;
    padding-top: 124px;
  }

  h1 {
    font-size: clamp(64px, 22vw, 112px);
  }

  .hero-actions,
  .section-head {
    display: grid;
  }

  .button,
  .contact-panel a {
    width: 100%;
  }

  .mission-card {
    min-height: 380px;
  }

  .orbit-system {
    transform: scale(0.82);
  }

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

  .section {
    padding: 82px 18px;
  }

  .about,
  .orbit-section,
  .contact {
    margin: 0 12px 20px;
  }
}

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

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

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