@charset "UTF-8";

:root {
  --bg: #101a3a;
  --bg-2: #0c1530;
  --panel: #16224a;
  --line: #2b3a6d;
  --ink: #eef1ff;
  --muted: #9aa6cc;
  --violet: #8a7bff;
  --violet-soft: #b9b0ff;
  --star: #cfd8ff;
  --shell: 1160px;
  --header-height: 70px;
  --mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 18px); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
svg { display: block; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--violet); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--violet-soft);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.6px;
  line-height: 1.4;
}
.eyebrow::before { width: 18px; height: 1px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid rgba(138, 123, 255, .18);
  background: rgba(13, 21, 48, .92);
  backdrop-filter: blur(16px);
}
.nav-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 48px), var(--shell));
  min-height: var(--header-height);
  margin: 0 auto;
  gap: 20px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 11px; font-size: 20px; font-weight: 900; letter-spacing: .2px; }
.brand img { width: 36px; height: 36px; border-radius: 10px; object-fit: contain; background: #1a2752; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border: 1px solid var(--violet);
  border-radius: 50%;
  color: var(--violet-soft);
  font-family: var(--mono);
  font-size: 9px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(11px, 1.8vw, 24px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 8px 0; color: #a7b1d4; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--violet-soft); }
.nav-actions { display: flex; align-items: center; flex: none; gap: 10px; }
.nav-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  gap: 8px;
  padding: 0 18px;
  border: 1px solid var(--violet);
  border-radius: 10px;
  background: linear-gradient(135deg, #8a7bff, #6f5ff0);
  color: #0e1530;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: filter .18s ease;
}
.nav-download:hover { filter: brightness(1.12); }
.nav-download svg, .button svg { width: 18px; height: 18px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 10px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--ink); transition: transform .18s ease; }
.menu-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* hero: star field + arc horizon + right poster + bottom-right capsule */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #0b1230 0%, #101a3a 62%, #0d1631 100%);
}
.hero-sky {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.4px 1.4px at 12% 18%, rgba(232, 237, 255, .95), transparent 100%),
    radial-gradient(1.2px 1.2px at 28% 34%, rgba(200, 210, 255, .8), transparent 100%),
    radial-gradient(1.6px 1.6px at 44% 12%, rgba(255, 255, 255, .9), transparent 100%),
    radial-gradient(1.1px 1.1px at 58% 29%, rgba(190, 200, 255, .75), transparent 100%),
    radial-gradient(1.5px 1.5px at 72% 14%, rgba(255, 255, 255, .85), transparent 100%),
    radial-gradient(1.2px 1.2px at 86% 33%, rgba(200, 210, 255, .7), transparent 100%),
    radial-gradient(1.3px 1.3px at 8% 58%, rgba(220, 228, 255, .55), transparent 100%),
    radial-gradient(1.1px 1.1px at 34% 66%, rgba(220, 228, 255, .45), transparent 100%),
    radial-gradient(1.5px 1.5px at 66% 58%, rgba(255, 255, 255, .5), transparent 100%),
    radial-gradient(1.2px 1.2px at 92% 62%, rgba(220, 228, 255, .55), transparent 100%),
    radial-gradient(560px 320px at 82% 8%, rgba(138, 123, 255, .26), transparent 72%),
    radial-gradient(460px 260px at 10% 76%, rgba(74, 96, 200, .22), transparent 74%);
  pointer-events: none;
}
.hero-arc {
  position: absolute;
  left: 50%;
  bottom: -90%;
  width: 150%;
  aspect-ratio: 2 / 1;
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
  border-top: 1px solid rgba(138, 123, 255, .55);
  background: radial-gradient(60% 70% at 50% 0%, rgba(138, 123, 255, .26), rgba(10, 17, 40, 0) 72%);
  transform: translateX(-50%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(240px, .9fr);
  align-items: center;
  gap: clamp(22px, 4vw, 54px);
  padding: 72px 0 96px;
}
.hero-copy { min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: #aab4d8;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.5px;
}
.hero-kicker b {
  padding: 3px 8px;
  border: 1px solid rgba(138, 123, 255, .6);
  border-radius: 3px;
  color: var(--violet-soft);
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.4px;
}
.hero h1 {
  margin: 0;
  font-size: clamp(52px, 7.6vw, 96px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.4vw, -4px);
  line-height: 1;
  text-shadow: 0 0 34px rgba(138, 123, 255, .38);
}
.hero-subtitle {
  display: inline-block;
  margin: 18px 0 0;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(138, 123, 255, .42);
  color: var(--violet-soft);
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 520px; margin: 16px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; margin-top: 26px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  gap: 12px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 900;
  transition: filter .18s ease, transform .18s ease;
}
.button-primary { background: linear-gradient(135deg, #9a8cff, #7466f5); color: #0e1530; box-shadow: 0 16px 34px rgba(116, 102, 245, .3); }
.button-primary:hover { filter: brightness(1.1); transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 32px; font-size: 15px; }
.text-link { color: #b9c3e4; border-bottom: 1px dashed #4a5887; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--violet-soft); }

.hero-poster {
  position: relative;
  justify-self: end;
  width: min(100%, 336px);
  margin: 0;
  border: 1px solid rgba(138, 123, 255, .35);
  border-radius: 150px 150px 16px 16px;
  overflow: hidden;
  box-shadow: 0 30px 62px rgba(4, 8, 24, .62), 0 0 0 8px rgba(138, 123, 255, .07);
}
.hero-poster img { width: 100%; height: auto; aspect-ratio: 5 / 7; object-fit: cover; object-position: center 22%; }
.hero-orbit {
  position: absolute;
  inset: -14px -14px auto auto;
  width: 78px;
  height: 78px;
  border: 1px solid rgba(185, 176, 255, .45);
  border-radius: 50%;
  transform: rotate(-18deg) scaleY(.42);
  pointer-events: none;
}
.hero-capsule {
  position: absolute;
  right: max(24px, calc((100% - var(--shell)) / 2));
  bottom: 26px;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px 9px 10px;
  margin: 0;
  border: 1px solid rgba(138, 123, 255, .5);
  border-radius: 999px;
  background: rgba(13, 21, 48, .82);
  backdrop-filter: blur(8px);
}
.hero-capsule b { padding: 3px 10px; border-radius: 999px; background: var(--violet); color: #0e1530; font-size: 11px; font-weight: 900; }
.hero-capsule span { color: #c2cbec; font-size: 11.5px; }

/* features: four across */
.features { padding: 74px 0 78px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 30px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.7vw, 33px); font-weight: 900; letter-spacing: -.6px; line-height: 1.32; }
.section-heading > p:last-child { max-width: 600px; margin: 11px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(200px, 290px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 5px; }
.section-heading-center { text-align: center; }
.section-heading-center .eyebrow { justify-content: center; }
.section-heading-center > p:last-child { margin-left: auto; margin-right: auto; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  position: relative;
  padding: 26px 20px 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(138, 123, 255, .1), rgba(138, 123, 255, 0) 58%), var(--panel);
}
.feature-card::after {
  position: absolute;
  top: 0;
  left: 20px;
  width: 36px;
  height: 2px;
  content: "";
  background: var(--violet);
}
.feature-no { display: block; margin-bottom: 14px; color: var(--violet-soft); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 2px; }
.feature-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* shots: 2x2 art wall */
.shots { padding: 74px 0 80px; }
.art-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.art-card { position: relative; margin: 0; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: #0d1631; }
.art-card img { width: 100%; height: auto; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 20%; }
.art-card:nth-child(3) img, .art-card:nth-child(4) img { aspect-ratio: 4 / 5; object-position: center 26%; }
.art-card figcaption {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 13px 16px 15px;
  border-top: 1px solid rgba(138, 123, 255, .22);
  background: rgba(13, 21, 48, .86);
}
.art-card figcaption b { color: var(--violet-soft); font-family: var(--mono); font-size: 10px; }
.art-card figcaption span { display: flex; flex-direction: column; font-size: 13.5px; font-weight: 800; line-height: 1.45; }
.art-card figcaption small { color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq: centered single column with Q rail */
.faq { padding: 72px 0 78px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-list { max-width: 800px; margin: 0 auto; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 0;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::before { content: "Q"; color: var(--violet); font-family: var(--mono); font-size: 12px; font-weight: 700; }
.faq-list summary h3 { flex: 1; margin: 0; font-size: 15.5px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 20px; height: 20px; border: 1px solid var(--line); border-radius: 50%; }
.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 1.5px;
  content: "";
  background: var(--violet-soft);
  transform: translate(-50%, -50%);
}
.faq-list summary i::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
.faq-list details[open] summary i::after { transform: translate(-50%, -50%) rotate(0); }
.faq-list details p { padding: 0 34px 17px 26px; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews: single column rows */
.reviews { padding: 74px 0 78px; }
.review-list { display: grid; gap: 0; padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.review-card {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 22px;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}
.review-meta { display: flex; flex-direction: column; gap: 4px; }
.review-meta b { color: var(--violet-soft); font-size: 13.5px; font-weight: 900; }
.review-meta time { color: #77839f; font-family: var(--mono); font-size: 10px; }
.review-card p { margin: 0; color: #b7c0dc; font-size: 13.5px; line-height: 1.8; }

/* steps: vertical timeline */
.steps { padding: 70px 0 76px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; gap: 0; padding: 0 0 0 26px; margin: 0; list-style: none; border-left: 1px solid var(--line); }
.step-list li { position: relative; display: grid; grid-template-columns: 64px minmax(0, 1fr); gap: 18px; padding: 0 0 26px; }
.step-list li:last-child { padding-bottom: 0; }
.step-list li::before {
  position: absolute;
  top: 6px;
  left: -33px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--bg-2);
  border-radius: 50%;
  background: var(--violet);
  content: "";
}
.step-list span { color: var(--violet-soft); font-family: var(--mono); font-size: 26px; font-weight: 700; line-height: 1; }
.step-list h3 { margin: 0 0 5px; font-size: 16px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download: centered */
.download { padding: 30px 0 34px; }
.download-inner {
  position: relative;
  padding: 52px 24px 46px;
  border: 1px solid rgba(138, 123, 255, .34);
  border-radius: 18px;
  background:
    radial-gradient(360px 180px at 50% 0%, rgba(138, 123, 255, .3), transparent 76%),
    linear-gradient(160deg, #17224b, #0e1732 72%);
  text-align: center;
  overflow: hidden;
}
.download-inner::before {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 620px;
  height: 620px;
  border: 1px solid rgba(138, 123, 255, .16);
  border-radius: 50%;
  content: "";
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.download .eyebrow { justify-content: center; }
.download h2 { position: relative; max-width: 620px; margin: 0 auto; }
.download-inner > p { position: relative; margin: 12px auto 24px; color: var(--muted); font-size: 14px; }
.download .button { position: relative; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; padding: 20px 0 0; margin: 26px auto 0; border-top: 1px solid rgba(138, 123, 255, .2); list-style: none; }
.download-notes li { color: #a9b3d5; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 8px; content: "✦"; color: var(--violet-soft); }

/* footer */
.site-footer { padding: 42px 0 52px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 20px 40px; align-items: start; }
.footer-brand strong { font-size: 18px; font-weight: 900; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.footer-nav a { color: #b0bad9; font-size: 12px; }
.footer-nav a:hover { color: var(--violet-soft); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-meta p { margin: 0; }
.footer-meta a { color: var(--muted); }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #78839f; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) 280px; gap: 24px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 8px 24px 16px;
    border-bottom: 1px solid var(--line);
    background: #0c1530;
    box-shadow: 0 16px 26px rgba(0, 0, 0, .5);
  }
  .primary-nav.is-open { display: block; }
  .primary-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
  .primary-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .hero-grid { grid-template-columns: 1fr; padding: 52px 0 86px; }
  .hero-poster { justify-self: start; width: min(280px, 68%); }
  .hero-capsule { right: 24px; bottom: 20px; }
  .hero-arc { bottom: -74%; width: 200%; }
  .review-card { grid-template-columns: 1fr; gap: 8px; }
  .review-meta { flex-direction: row; align-items: baseline; gap: 12px; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .brand { font-size: 17px; gap: 8px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-download { min-height: 38px; padding: 0 12px; font-size: 12px; gap: 6px; }
  .nav-download svg { width: 16px; height: 16px; }
  .menu-toggle { width: 38px; height: 38px; }
  .hero h1 { font-size: clamp(44px, 13.5vw, 62px); }
  .feature-grid { grid-template-columns: 1fr; }
  .art-grid { grid-template-columns: 1fr; }
  .section-heading-split { grid-template-columns: 1fr; gap: 10px; }
  .section-heading-split > p:last-child { margin: 0; }
  .step-list li { grid-template-columns: 44px minmax(0, 1fr); gap: 12px; }
  .step-list span { font-size: 21px; }
  .hero-capsule { position: static; margin: 0 24px 26px; width: fit-content; }
  .download-notes li { font-size: 10.5px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 28px; height: 28px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 34px; padding: 0 9px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 42px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; }
}