@charset "UTF-8";

:root {
  --bg: #070a16;
  --bg-2: #0a1020;
  --panel: #0e1428;
  --line: #1d2748;
  --ink: #e9f1ff;
  --muted: #93a3c4;
  --cyan: #23d3d3;
  --purple: #6c3bff;
  --shell: 1180px;
  --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(--cyan); outline-offset: 4px; }
.page-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 2.4px;
  text-transform: uppercase;
}
.eyebrow::before { width: 18px; height: 1px; content: ""; background: linear-gradient(90deg, var(--cyan), transparent); }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 10, 22, .88);
  backdrop-filter: blur(12px);
}
.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: 18px;
}
.brand { display: inline-flex; align-items: center; flex: none; gap: 10px; font-size: 21px; font-weight: 900; letter-spacing: 1px; color: #fff; }
.brand img { width: 36px; height: 36px; border-radius: 9px; object-fit: contain; }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border: 1px solid rgba(35, 211, 211, .5);
  border-radius: 5px;
  color: var(--cyan);
  font-size: 11px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 2vw, 26px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 6px 0; color: #a9b8d6; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { color: var(--cyan); }
.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 rgba(35, 211, 211, .55);
  border-radius: 8px;
  background: linear-gradient(120deg, rgba(35, 211, 211, .18), rgba(108, 59, 255, .28));
  color: #d6feff;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: box-shadow .18s ease, border-color .18s ease;
}
.nav-download:hover { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(35, 211, 211, .14); }
.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: 8px; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; width: 18px; height: 2px; margin: 5px auto; background: var(--cyan); 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 */
.hero {
  position: relative;
  overflow: hidden;
  padding: 52px 0 96px;
  background:
    radial-gradient(760px 460px at 50% -12%, rgba(108, 59, 255, .34), transparent 68%),
    radial-gradient(620px 380px at 50% 42%, rgba(35, 211, 211, .16), transparent 72%),
    linear-gradient(180deg, #0a0f22, #070a16 86%);
}
.hero-copy { position: relative; z-index: 3; max-width: 660px; margin: 0 auto; text-align: center; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 14px;
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--cyan);
  color: #9fb0d2;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 1.6px;
}
.hero-kicker b { color: var(--cyan); font-size: 10px; letter-spacing: 2px; }
.hero h1 {
  margin: 0;
  color: #fff;
  font-size: clamp(50px, 8.4vw, 100px);
  font-weight: 900;
  letter-spacing: .04em;
  line-height: 1;
  text-shadow: 0 0 42px rgba(35, 211, 211, .3);
}
.hero-subtitle {
  margin: 18px 0 0;
  color: var(--cyan);
  font-size: clamp(17px, 2.1vw, 23px);
  font-weight: 900;
  letter-spacing: 1px;
}
.hero-lead { max-width: 560px; margin: 12px auto 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 14px; 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: 8px;
  font-size: 14px;
  font-weight: 900;
  transition: transform .18s ease, box-shadow .18s ease;
}
.button-primary { background: linear-gradient(120deg, var(--cyan), #46b6ff 48%, var(--purple)); color: #04121c; box-shadow: 0 14px 30px rgba(35, 211, 211, .22); }
.button-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px rgba(108, 59, 255, .3); }
.button-ghost { border-color: rgba(35, 211, 211, .4); color: #bff9f9; background: rgba(35, 211, 211, .06); }
.button-ghost:hover { border-color: var(--cyan); background: rgba(35, 211, 211, .12); }
.button-large { min-height: 54px; padding: 0 32px; font-size: 15px; }

.portal { position: relative; z-index: 2; width: min(430px, 80vw); margin: clamp(28px, 4vw, 44px) auto 0; aspect-ratio: 1 / 1; }
.portal-rings {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, rgba(35, 211, 211, .95), rgba(108, 59, 255, .95), rgba(35, 211, 211, .2), rgba(35, 211, 211, .95));
  -webkit-mask: radial-gradient(circle, transparent 66%, #000 67%, #000 71%, transparent 72%);
  mask: radial-gradient(circle, transparent 66%, #000 67%, #000 71%, transparent 72%);
  animation: portal-spin 24s linear infinite;
}
.portal::before {
  position: absolute;
  inset: -22px;
  border: 1px solid rgba(35, 211, 211, .22);
  border-radius: 50%;
  content: "";
}
.portal::after {
  position: absolute;
  inset: -46px;
  border: 1px dashed rgba(108, 59, 255, .28);
  border-radius: 50%;
  content: "";
}
@keyframes portal-spin { to { transform: rotate(360deg); } }
.portal-core {
  position: absolute;
  inset: 11%;
  margin: 0;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 70px rgba(35, 211, 211, .3), inset 0 0 50px rgba(108, 59, 255, .5);
}
.portal-core img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; }
.portal-mini {
  position: absolute;
  right: -18px;
  bottom: 4%;
  width: 118px;
  margin: 0;
  border: 1px solid rgba(35, 211, 211, .45);
  border-radius: 10px;
  background: #0a1020;
  box-shadow: 0 18px 30px rgba(0, 0, 0, .55);
  overflow: hidden;
  transform: rotate(6deg);
}
.portal-mini img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; object-position: center 4%; }
.portal-mini figcaption { padding: 6px 8px 7px; color: var(--cyan); font-family: var(--mono); font-size: 9px; text-align: center; white-space: nowrap; }
.grid-floor {
  position: absolute;
  bottom: -40px;
  left: 50%;
  width: 160%;
  height: 300px;
  background-image:
    linear-gradient(rgba(35, 211, 211, .28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 211, 211, .28) 1px, transparent 1px);
  background-size: 64px 64px;
  transform: translateX(-50%) perspective(300px) rotateX(64deg);
  transform-origin: center bottom;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 60%);
  mask-image: linear-gradient(180deg, transparent, #000 60%);
  opacity: .5;
  pointer-events: none;
}

/* features */
.features { padding: 62px 0 66px; border-top: 1px solid var(--line); }
.section-heading { margin-bottom: 26px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.9vw, 34px); font-weight: 900; letter-spacing: -.4px; line-height: 1.32; }
.section-heading > p:last-child { max-width: 620px; margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(190px, 300px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-left: 2px solid rgba(35, 211, 211, .55);
  border-radius: 6px;
  background: linear-gradient(150deg, #0e1428, #0b1122);
  transition: border-left-color .18s ease, background .18s ease;
}
.feature-card:hover { border-left-color: var(--purple); background: linear-gradient(150deg, #101833, #0c1226); }
.feature-no { color: var(--purple); font-family: var(--mono); font-size: 15px; font-weight: 700; line-height: 1.5; }
.feature-card h3 { margin: 0 0 6px; font-size: 16.5px; font-weight: 900; color: #fff; }
.feature-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* shots */
.shots { padding: 62px 0 68px; background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.shot-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.shot-card { margin: 0; border: 1px solid var(--line); border-radius: 8px; background: #0b1122; overflow: hidden; }
.shot-card img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; object-position: center 4%; border-bottom: 1px solid var(--line); }
.shot-card figcaption { display: flex; align-items: baseline; gap: 8px; padding: 10px 12px 11px; }
.shot-card figcaption b { color: var(--cyan); font-family: var(--mono); font-size: 10px; }
.shot-card figcaption span { display: flex; flex-direction: column; font-size: 12.5px; font-weight: 800; color: #dbe6ff; line-height: 1.4; }
.shot-card figcaption small { color: #8494b4; font-size: 10px; font-weight: 500; }

/* faq */
.faq { padding: 62px 0 68px; }
.faq-layout { display: grid; grid-template-columns: minmax(0, .76fr) minmax(0, 1.24fr); gap: clamp(22px, 4vw, 52px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 22px); align-self: start; }
.faq-list { display: grid; gap: 8px; }
.faq-list details { border: 1px solid var(--line); border-radius: 6px; background: #0b1122; }
.faq-list details[open] { border-color: rgba(35, 211, 211, .38); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 14px 16px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 14.5px; font-weight: 800; color: #eaf2ff; }
.faq-list summary i { position: relative; flex: none; width: 18px; height: 18px; border: 1px solid rgba(35, 211, 211, .45); border-radius: 4px; }
.faq-list summary i::before,
.faq-list summary i::after { position: absolute; top: 50%; left: 50%; width: 8px; height: 1.4px; content: ""; background: var(--cyan); 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 18px 15px; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews: three columns */
.reviews { padding: 62px 0 68px; border-top: 1px solid var(--line); }
.review-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 0; margin: 0; list-style: none; }
.review-card { position: relative; padding: 18px 18px 16px; border: 1px solid var(--line); border-radius: 6px; background: #0b1122; }
.review-card::before { position: absolute; top: 10px; right: 14px; content: "”"; color: rgba(108, 59, 255, .5); font-family: Georgia, serif; font-size: 32px; line-height: 1; }
.review-meta { display: flex; flex-direction: column; gap: 3px; padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px solid var(--line); }
.review-meta b { color: var(--cyan); font-size: 12.5px; font-weight: 900; }
.review-meta time { color: #7d8dad; font-family: var(--mono); font-size: 9.5px; }
.review-card p { margin: 0; color: #c6d3ea; font-size: 12.5px; line-height: 1.8; }

/* steps: vertical */
.steps { padding: 60px 0 66px; background: var(--bg-2); border-top: 1px solid var(--line); }
.step-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.step-list li {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0b1122;
}
.step-list span { color: var(--purple); font-family: var(--mono); font-size: 22px; font-weight: 700; line-height: 1.2; }
.step-list h3 { margin: 0 0 4px; font-size: 16px; font-weight: 900; color: #fff; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download */
.download { padding: 24px 0 36px; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  align-items: center;
  gap: clamp(20px, 4vw, 44px);
  padding: clamp(28px, 4.4vw, 50px);
  border: 1px solid rgba(35, 211, 211, .35);
  border-radius: 10px;
  background:
    radial-gradient(420px 240px at 88% 0%, rgba(108, 59, 255, .38), transparent 70%),
    linear-gradient(140deg, #0c1a2c, #0b1122 62%, #140f30);
}
.download h2 { color: #fff; }
.download-inner > .download-copy > p { margin: 12px 0 0; color: var(--muted); font-size: 14px; }
.download-notes { display: flex; flex-wrap: wrap; gap: 8px 20px; padding: 14px 0 0; margin: 16px 0 0; border-top: 1px solid var(--line); list-style: none; }
.download-notes li { color: #9fb0d2; font-family: var(--mono); font-size: 11px; }
.download-notes li::before { margin-right: 7px; content: "//"; color: var(--cyan); }

/* footer */
.site-footer { padding: 36px 0 46px; border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 18px 40px; align-items: start; }
.footer-brand strong { color: #fff; font-size: 18px; font-weight: 900; letter-spacing: 1px; }
.footer-brand p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-nav a { color: #9fb0d2; font-size: 12px; }
.footer-nav a:hover { color: var(--cyan); }
.footer-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-meta p { margin: 0; }
.disclaimer { grid-column: 1 / -1; margin: 0; color: #6f7f9f; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .review-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card { grid-template-columns: 44px minmax(0, 1fr); gap: 12px; }
}
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .primary-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 6px 24px 14px;
    border-bottom: 1px solid var(--line);
    background: #080c1a;
    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); }
  .faq-layout { grid-template-columns: 1fr; gap: 20px; }
  .faq-heading { position: static; }
  .shot-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .download-inner { grid-template-columns: 1fr; }
  .review-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero { padding: 40px 0 84px; }
  .hero h1 { font-size: clamp(42px, 14vw, 62px); }
  .hero-lead { font-size: 14px; }
  .portal { width: min(340px, 84vw); }
  .portal-mini { right: 0; width: 82px; }
  .portal-mini figcaption { font-size: 8px; padding: 4px 5px; }
  .grid-floor { height: 220px; background-size: 48px 48px; }
  .section-heading-split { grid-template-columns: 1fr; gap: 8px; }
  .section-heading-split > p:last-child { margin: 0; }
  .feature-grid { grid-template-columns: 1fr; }
  .shot-row { grid-template-columns: 1fr; }
  .shot-card img { aspect-ratio: 4 / 5; object-position: center 6%; }
  .review-list { grid-template-columns: 1fr; }
  .step-list li { grid-template-columns: 52px minmax(0, 1fr); gap: 12px; padding: 14px 16px; }
  .step-list span { font-size: 19px; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 17px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 8px; }
  .nav-download { min-height: 34px; padding: 0 10px; font-size: 11px; gap: 5px; }
  .nav-download svg { width: 14px; height: 14px; }
  .menu-toggle { width: 34px; height: 34px; }
  .hero h1 { font-size: 40px; }
  .hero-actions .button { width: 100%; }
  .portal { width: 88vw; }
  .portal-mini { display: none; }
}