@charset "UTF-8";

:root {
  --bg: #080e20;
  --bg-2: #0c1530;
  --panel: #101c3d;
  --line: #22335e;
  --ink: #eef3ff;
  --muted: #93a2c6;
  --indigo: #1d2e5c;
  --cyan: #3fe0d0;
  --cyan-dim: #1f7f7a;
  --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: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 13px;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.6px;
  line-height: 1.4;
}
.eyebrow::before { width: 18px; height: 2px; content: ""; background: currentColor; }

/* header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid var(--line);
  background: rgba(8, 14, 32, .94);
  backdrop-filter: blur(14px);
}
.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: 10px; font-family: var(--mono); font-size: 20px; font-weight: 900; letter-spacing: -.2px; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 11px; object-fit: contain; background: var(--indigo); }
.brand-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 19px;
  height: 19px;
  border: 1px solid var(--cyan);
  border-radius: 4px;
  color: var(--cyan);
  font-size: 10px;
  font-style: normal;
  font-weight: 900;
}
.primary-nav { margin-left: auto; }
.primary-nav ul { display: flex; align-items: center; gap: clamp(12px, 1.9vw, 26px); padding: 0; margin: 0; list-style: none; }
.primary-nav a { display: block; padding: 7px 0; border-bottom: 2px solid transparent; color: #a6b5d8; font-size: 13px; font-weight: 700; }
.primary-nav a:hover { border-bottom-color: var(--cyan); color: #fff; }
.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(--cyan);
  border-radius: 8px;
  background: var(--cyan);
  color: #062b2a;
  font-size: 13px;
  font-weight: 900;
  white-space: nowrap;
  transition: background .18s ease, color .18s ease;
}
.nav-download:hover { background: transparent; color: var(--cyan); }
.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(--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: copy + 8 cell matrix + switch strip */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(700px 420px at 82% -8%, rgba(63, 224, 208, .18), transparent 68%),
    radial-gradient(520px 320px at 2% 96%, rgba(63, 224, 208, .09), transparent 72%),
    linear-gradient(175deg, #14244b 0%, #0a1129 68%, var(--bg) 100%);
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background-image:
    linear-gradient(rgba(63, 224, 208, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 224, 208, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(600px 420px at 74% 22%, #000, transparent 78%);
  pointer-events: none;
}
.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 430px);
  grid-template-areas: "copy matrix" "strip strip";
  align-items: center;
  gap: 34px clamp(24px, 4vw, 56px);
  padding: 58px 0 34px;
}
.hero-copy { grid-area: copy; min-width: 0; }
.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 15px;
  color: #b4c2e2;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 1.5px;
}
.hero-kicker b {
  padding: 3px 7px;
  border: 1px solid var(--cyan);
  border-radius: 3px;
  color: var(--cyan);
  font-size: 9.5px;
  font-weight: 900;
  letter-spacing: 1.1px;
}
.hero h1 {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(56px, 8vw, 104px);
  font-weight: 900;
  letter-spacing: clamp(-2px, -.4vw, -4px);
  line-height: .94;
}
.hero-subtitle {
  margin: 18px 0 0;
  color: var(--cyan);
  font-size: clamp(18px, 2.1vw, 24px);
  font-weight: 800;
  line-height: 1.4;
}
.hero-lead { max-width: 520px; margin: 13px 0 0; color: var(--muted); font-size: 14.5px; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 20px; margin-top: 27px; }
.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, background .18s ease, color .18s ease;
}
.button-primary { background: var(--cyan); color: #062b2a; box-shadow: 0 14px 30px rgba(63, 224, 208, .2); }
.button-primary:hover { background: #6beee0; transform: translateY(-2px); }
.button-large { min-height: 54px; padding: 0 32px; font-size: 15px; }
.text-link { color: #c6d2ec; border-bottom: 1px dashed #3a4d7d; font-size: 13px; font-weight: 800; }
.text-link span { display: inline-block; margin-left: 5px; color: var(--cyan); }

.hero-matrix {
  grid-area: matrix;
  padding: 20px;
  border: 1px solid #2b4272;
  border-radius: 14px;
  background: linear-gradient(165deg, rgba(29, 46, 92, .9), rgba(12, 21, 48, .94));
  box-shadow: 0 26px 50px rgba(0, 0, 0, .45);
}
.matrix-head { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding-bottom: 12px; border-bottom: 1px dashed #2f4776; }
.matrix-head b { font-size: 14px; font-weight: 900; }
.matrix-head span { color: #7f90b6; font-family: var(--mono); font-size: 9.5px; letter-spacing: 1px; }
.matrix-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 7px; padding: 0; margin: 14px 0 0; list-style: none; }
.matrix-grid li {
  padding: 11px 6px 10px;
  border: 1px solid #27395f;
  border-radius: 7px;
  background: rgba(9, 16, 36, .7);
  text-align: center;
}
.matrix-grid b { display: block; font-size: 12.5px; font-weight: 900; line-height: 1.4; }
.matrix-grid span { display: block; margin-top: 3px; color: #6c7da4; font-family: var(--mono); font-size: 8.5px; line-height: 1.4; }
.matrix-grid .is-on { border-color: rgba(63, 224, 208, .45); background: rgba(63, 224, 208, .08); }
.matrix-grid .is-on b { color: var(--cyan); }
.matrix-grid .is-on span { color: #78c6bd; }

.switch-strip {
  grid-area: strip;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 18px;
  padding: 13px 18px;
  border: 1px solid #263a63;
  border-radius: 10px;
  background: rgba(9, 16, 36, .66);
}
.switch-label { flex: none; padding-right: 14px; border-right: 1px solid #2a3d66; color: var(--cyan); font-family: var(--mono); font-size: 10px; font-weight: 700; letter-spacing: 1.4px; }
.switch-strip ol { display: flex; flex: 1 1 300px; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; list-style: none; }
.switch-strip li { display: flex; align-items: baseline; gap: 7px; padding: 5px 11px; border: 1px solid #26395f; border-radius: 999px; }
.switch-strip li b { font-size: 12px; font-weight: 900; }
.switch-strip li span { color: #6f80a6; font-family: var(--mono); font-size: 9px; }
.switch-strip .done { border-color: rgba(63, 224, 208, .3); }
.switch-strip .done span { color: #6fbfb6; }
.switch-strip .now { border-color: var(--cyan); background: rgba(63, 224, 208, .14); }
.switch-strip .now b, .switch-strip .now span { color: var(--cyan); }

/* features: 4 across */
.features { padding: 72px 0 76px; border-bottom: 1px solid var(--line); background: var(--bg-2); }
.section-heading { margin-bottom: 32px; }
.section-heading h2, .download h2 { margin: 0; font-size: clamp(24px, 2.8vw, 35px); font-weight: 900; letter-spacing: -.8px; line-height: 1.3; }
.section-heading > p:last-child { max-width: 620px; margin: 11px 0 0; color: var(--muted); font-size: 14px; }
.section-heading-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(210px, 300px); align-items: end; gap: 26px; }
.section-heading-split > p:last-child { margin: 0 0 4px; }
.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.feature-card {
  position: relative;
  padding: 24px 20px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: 0 0 8px 8px;
  background: linear-gradient(180deg, rgba(63, 224, 208, .06), transparent 42%), var(--panel);
}
.feature-no { display: block; margin-bottom: 14px; color: var(--cyan); font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 1.6px; }
.feature-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 900; }
.feature-card p { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.85; }

/* shots */
.shots { padding: 72px 0 80px; }
.poster-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; align-items: start; }
.poster-card { margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); overflow: hidden; }
.poster-card img { width: 100%; height: auto; aspect-ratio: 3 / 4; object-fit: cover; }
.poster-card figcaption { display: flex; align-items: baseline; gap: 10px; padding: 12px 14px 13px; border-top: 1px solid var(--line); }
.poster-card figcaption b { color: var(--cyan); font-family: var(--mono); font-size: 10px; }
.poster-card figcaption span { display: flex; flex-direction: column; font-size: 13px; font-weight: 800; line-height: 1.4; }
.poster-card figcaption small { color: var(--muted); font-size: 10.5px; font-weight: 500; }

/* faq */
.faq { padding: 70px 0 76px; border-top: 1px solid var(--line); background: var(--bg-2); }
.faq-layout { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr); gap: clamp(26px, 4vw, 54px); }
.faq-heading { position: sticky; top: calc(var(--header-height) + 26px); align-self: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 17px 0; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary h3 { margin: 0; font-size: 15.5px; font-weight: 900; }
.faq-list summary i { position: relative; flex: none; width: 22px; height: 22px; border: 1px solid #2b4069; border-radius: 6px; }
.faq-list summary i::before, .faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.5px;
  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 28px 17px 0; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* reviews */
.reviews { padding: 72px 0 78px; }
.review-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; padding: 0; margin: 0; list-style: none; }
.review-card { padding: 18px 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.review-card:nth-child(odd) { border-left: 2px solid var(--cyan); }
.review-meta { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 6px; padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px dashed var(--line); }
.review-meta b { color: var(--cyan); font-size: 13px; font-weight: 900; }
.review-meta time { color: #6f80a6; font-family: var(--mono); font-size: 9.5px; }
.review-card p { margin: 0; color: #b3c0da; font-size: 13px; line-height: 1.8; }

/* steps: vertical */
.steps { padding: 68px 0 74px; border-top: 1px solid var(--line); background: var(--bg-2); }
.step-list { display: grid; grid-template-columns: 1fr; gap: 0; padding: 0; margin: 0; list-style: none; border-top: 1px solid var(--line); }
.step-list li { display: grid; grid-template-columns: 64px 150px minmax(0, 1fr); align-items: baseline; gap: 14px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.step-list span { color: var(--cyan); font-family: var(--mono); font-size: 22px; font-weight: 700; line-height: 1; }
.step-list h3 { margin: 0; font-size: 17px; font-weight: 900; }
.step-list p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }

/* download: split */
.download { padding: 22px 0; }
.download-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 46px clamp(24px, 4.6vw, 56px);
  border: 1px solid rgba(63, 224, 208, .35);
  border-radius: 14px;
  background:
    radial-gradient(520px 260px at 6% -20%, rgba(63, 224, 208, .22), transparent 70%),
    linear-gradient(120deg, var(--indigo), #0e1a3a 92%);
}
.download .eyebrow { color: var(--cyan); }
.download h2 { color: #fff; }
.download-copy > p:last-child { max-width: 520px; margin: 12px 0 0; color: #a8b8d8; font-size: 14px; }
.download-side { justify-self: end; text-align: right; }
.download-notes { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px 16px; padding: 0; margin: 16px 0 0; list-style: none; }
.download-notes li { color: #8fa2c6; font-family: var(--mono); font-size: 10.5px; }
.download-notes li::before { margin-right: 6px; content: "◦"; color: var(--cyan); }

/* footer */
.site-footer { padding: 42px 0 50px; 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 { font-family: var(--mono); font-size: 17px; 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: #aebbd6; 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: 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: #6f80a6; font-size: 11.5px; line-height: 1.8; }

/* responsive */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr) minmax(280px, 360px); }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .poster-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step-list li { grid-template-columns: 54px 130px 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: var(--bg);
    box-shadow: 0 16px 26px rgba(0, 0, 0, .55);
  }
  .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; grid-template-areas: "copy" "matrix" "strip"; padding: 44px 0 30px; }
  .faq-layout { grid-template-columns: 1fr; }
  .faq-heading { position: static; }
  .download-inner { grid-template-columns: 1fr; }
  .download-side { justify-self: start; text-align: left; }
  .download-notes { justify-content: flex-start; }
}
@media (max-width: 600px) {
  .page-shell, .nav-shell { width: calc(100% - 32px); }
  .hero h1 { font-size: clamp(46px, 14vw, 62px); }
  .hero-lead { font-size: 14px; }
  .matrix-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid { grid-template-columns: 1fr; }
  .poster-row { grid-auto-flow: column; grid-auto-columns: 76%; grid-template-columns: none; gap: 10px; overflow-x: auto; scroll-snap-type: x mandatory; }
  .poster-card { scroll-snap-align: start; }
  .review-list { grid-template-columns: 1fr; }
  .section-heading-split { grid-template-columns: 1fr; gap: 9px; }
  .section-heading-split > p:last-child { margin: 0; }
  .step-list li { grid-template-columns: 46px minmax(0, 1fr); gap: 6px 12px; padding: 17px 0; }
  .step-list p { grid-column: 2 / -1; }
  .switch-strip { gap: 10px; padding: 12px 14px; }
  .switch-label { border-right: none; padding-right: 0; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
  .brand { font-size: 16px; gap: 7px; }
  .brand img { width: 30px; height: 30px; }
  .brand-tag { display: none; }
  .nav-actions { gap: 7px; }
  .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: 44px; }
  .hero-subtitle { font-size: 16px; }
  .button { width: 100%; }
  .switch-strip li { padding: 4px 9px; }
}